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Commit | Line | Data |
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025c1fac | 1 | /* path.cc: path support. |
1fd5e000 | 2 | |
81adfe28 | 3 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, |
4ee93264 | 4 | 2006, 2007, 2008, 2009, 2010 Red Hat, Inc. |
1fd5e000 | 5 | |
81adfe28 | 6 | This file is part of Cygwin. |
1fd5e000 | 7 | |
81adfe28 CF |
8 | This software is a copyrighted work licensed under the terms of the |
9 | Cygwin license. Please consult the file "CYGWIN_LICENSE" for | |
10 | details. */ | |
1fd5e000 | 11 | |
81adfe28 CF |
12 | /* This module's job is to |
13 | - convert between POSIX and Win32 style filenames, | |
14 | - support the `mount' functionality, | |
15 | - support symlinks for files and directories | |
1fd5e000 | 16 | |
81adfe28 | 17 | Pathnames are handled as follows: |
1fd5e000 | 18 | |
81adfe28 CF |
19 | - A \ or : in a path denotes a pure windows spec. |
20 | - Paths beginning with // (or \\) are not translated (i.e. looked | |
21 | up in the mount table) and are assumed to be UNC path names. | |
1fd5e000 | 22 | |
81adfe28 CF |
23 | The goal in the above set of rules is to allow both POSIX and Win32 |
24 | flavors of pathnames without either interfering. The rules are | |
25 | intended to be as close to a superset of both as possible. | |
1fd5e000 | 26 | |
81adfe28 CF |
27 | Note that you can have more than one path to a file. The mount |
28 | table is always prefered when translating Win32 paths to POSIX | |
29 | paths. Win32 paths in mount table entries may be UNC paths or | |
30 | standard Win32 paths starting with <drive-letter>: | |
1fd5e000 | 31 | |
81adfe28 CF |
32 | Text vs Binary issues are not considered here in path style |
33 | decisions, although the appropriate flags are retrieved and | |
34 | stored in various structures. | |
1fd5e000 | 35 | |
81adfe28 CF |
36 | Removing mounted filesystem support would simplify things greatly, |
37 | but having it gives us a mechanism of treating disk that lives on a | |
38 | UNIX machine as having UNIX semantics [it allows one to edit a text | |
39 | file on that disk and not have cr's magically appear and perhaps | |
40 | break apps running on UNIX boxes]. It also useful to be able to | |
41 | layout a hierarchy without changing the underlying directories. | |
1fd5e000 | 42 | |
81adfe28 CF |
43 | The semantics of mounting file systems is not intended to precisely |
44 | follow normal UNIX systems. | |
1fd5e000 | 45 | |
81adfe28 CF |
46 | Each DOS drive is defined to have a current directory. Supporting |
47 | this would complicate things so for now things are defined so that | |
48 | c: means c:\. | |
49 | */ | |
1fd5e000 | 50 | |
4c8d72de | 51 | #include "winsup.h" |
ade47a34 | 52 | #include "miscfuncs.h" |
1fd5e000 | 53 | #include <ctype.h> |
95bdb496 | 54 | #include <winioctl.h> |
10b06c5e CV |
55 | #include <wingdi.h> |
56 | #include <winuser.h> | |
10b06c5e | 57 | #include <winnetwk.h> |
c20ec37f | 58 | #include <shlobj.h> |
f0338f54 | 59 | #include <sys/cygwin.h> |
9e2baf8d | 60 | #include "cygerrno.h" |
6b91b8d5 | 61 | #include "security.h" |
bccd5e0d | 62 | #include "path.h" |
7ac61736 | 63 | #include "fhandler.h" |
0381fec6 | 64 | #include "dtable.h" |
b0e82b74 | 65 | #include "cygheap.h" |
29ac7f89 | 66 | #include "shared_info.h" |
29d52c8a | 67 | #include "cygtls.h" |
752b16ce | 68 | #include "tls_pbuf.h" |
6f1d4862 | 69 | #include "environ.h" |
1ec4f618 | 70 | #include <assert.h> |
cbe2437b | 71 | #include <ntdll.h> |
91d2f6ee | 72 | #include <wchar.h> |
e4b57503 | 73 | #include <wctype.h> |
1fd5e000 | 74 | |
1870c688 CV |
75 | bool dos_file_warning = true; |
76 | ||
66a83f3e CF |
77 | suffix_info stat_suffixes[] = |
78 | { | |
79 | suffix_info ("", 1), | |
80 | suffix_info (".exe", 1), | |
81 | suffix_info (NULL) | |
82 | }; | |
83 | ||
1870c688 CV |
84 | struct symlink_info |
85 | { | |
86 | char contents[SYMLINK_MAX + 1]; | |
87 | char *ext_here; | |
88 | int extn; | |
89 | unsigned pflags; | |
90 | DWORD fileattr; | |
91 | int issymlink; | |
92 | bool ext_tacked_on; | |
93 | int error; | |
1870c688 CV |
94 | bool isdevice; |
95 | _major_t major; | |
96 | _minor_t minor; | |
97 | _mode_t mode; | |
5a0d1edb CV |
98 | int check (char *path, const suffix_info *suffixes, fs_info &fs, |
99 | path_conv_handle &conv_hdl); | |
1870c688 CV |
100 | int set (char *path); |
101 | bool parse_device (const char *); | |
1870c688 CV |
102 | int check_sysfile (HANDLE h); |
103 | int check_shortcut (HANDLE h); | |
104 | int check_reparse_point (HANDLE h); | |
105 | int check_nfs_symlink (HANDLE h); | |
106 | int posixify (char *srcbuf); | |
107 | bool set_error (int); | |
108 | }; | |
109 | ||
110 | muto NO_COPY cwdstuff::cwd_lock; | |
111 | ||
1870c688 | 112 | static const GUID GUID_shortcut |
7b9e380f | 113 | = { 0x00021401L, 0, 0, {0xc0, 0, 0, 0, 0, 0, 0, 0x46}}; |
1870c688 CV |
114 | |
115 | enum { | |
116 | WSH_FLAG_IDLIST = 0x01, /* Contains an ITEMIDLIST. */ | |
117 | WSH_FLAG_FILE = 0x02, /* Contains a file locator element. */ | |
118 | WSH_FLAG_DESC = 0x04, /* Contains a description. */ | |
119 | WSH_FLAG_RELPATH = 0x08, /* Contains a relative path. */ | |
120 | WSH_FLAG_WD = 0x10, /* Contains a working dir. */ | |
121 | WSH_FLAG_CMDLINE = 0x20, /* Contains command line args. */ | |
122 | WSH_FLAG_ICON = 0x40 /* Contains a custom icon. */ | |
123 | }; | |
124 | ||
125 | struct win_shortcut_hdr | |
126 | { | |
127 | DWORD size; /* Header size in bytes. Must contain 0x4c. */ | |
128 | GUID magic; /* GUID of shortcut files. */ | |
129 | DWORD flags; /* Content flags. See above. */ | |
130 | ||
131 | /* The next fields from attr to icon_no are always set to 0 in Cygwin | |
132 | and U/Win shortcuts. */ | |
133 | DWORD attr; /* Target file attributes. */ | |
134 | FILETIME ctime; /* These filetime items are never touched by the */ | |
135 | FILETIME mtime; /* system, apparently. Values don't matter. */ | |
136 | FILETIME atime; | |
137 | DWORD filesize; /* Target filesize. */ | |
138 | DWORD icon_no; /* Icon number. */ | |
139 | ||
140 | DWORD run; /* Values defined in winuser.h. Use SW_NORMAL. */ | |
141 | DWORD hotkey; /* Hotkey value. Set to 0. */ | |
142 | DWORD dummy[2]; /* Future extension probably. Always 0. */ | |
81adfe28 CF |
143 | }; |
144 | ||
1870c688 CV |
145 | /* Return non-zero if PATH1 is a prefix of PATH2. |
146 | Both are assumed to be of the same path style and / vs \ usage. | |
147 | Neither may be "". | |
148 | LEN1 = strlen (PATH1). It's passed because often it's already known. | |
149 | ||
150 | Examples: | |
151 | /foo/ is a prefix of /foo <-- may seem odd, but desired | |
152 | /foo is a prefix of /foo/ | |
153 | / is a prefix of /foo/bar | |
154 | / is not a prefix of foo/bar | |
155 | foo/ is a prefix foo/bar | |
156 | /foo is not a prefix of /foobar | |
157 | */ | |
158 | ||
159 | int | |
e4b57503 CV |
160 | path_prefix_p (const char *path1, const char *path2, int len1, |
161 | bool caseinsensitive) | |
1870c688 CV |
162 | { |
163 | /* Handle case where PATH1 has trailing '/' and when it doesn't. */ | |
164 | if (len1 > 0 && isdirsep (path1[len1 - 1])) | |
165 | len1--; | |
166 | ||
167 | if (len1 == 0) | |
168 | return isdirsep (path2[0]) && !isdirsep (path2[1]); | |
169 | ||
170 | if (isdirsep (path2[len1]) || path2[len1] == 0 || path1[len1 - 1] == ':') | |
54a83cc6 CV |
171 | return caseinsensitive ? strncasematch (path1, path2, len1) |
172 | : !strncmp (path1, path2, len1); | |
1870c688 CV |
173 | |
174 | return 0; | |
175 | } | |
176 | ||
177 | /* Return non-zero if paths match in first len chars. | |
178 | Check is dependent of the case sensitivity setting. */ | |
179 | int | |
e4b57503 | 180 | pathnmatch (const char *path1, const char *path2, int len, bool caseinsensitive) |
1870c688 | 181 | { |
e4b57503 CV |
182 | return caseinsensitive |
183 | ? strncasematch (path1, path2, len) : !strncmp (path1, path2, len); | |
1870c688 CV |
184 | } |
185 | ||
186 | /* Return non-zero if paths match. Check is dependent of the case | |
187 | sensitivity setting. */ | |
188 | int | |
e4b57503 | 189 | pathmatch (const char *path1, const char *path2, bool caseinsensitive) |
1870c688 | 190 | { |
e4b57503 CV |
191 | return caseinsensitive |
192 | ? strcasematch (path1, path2) : !strcmp (path1, path2); | |
1870c688 CV |
193 | } |
194 | ||
195 | /* TODO: This function is used in mkdir and rmdir to generate correct | |
196 | error messages in case of paths ending in /. or /.. components. | |
197 | Right now, normalize_posix_path will just normalize | |
198 | those components away, which changes the semantics. */ | |
199 | bool | |
200 | has_dot_last_component (const char *dir, bool test_dot_dot) | |
201 | { | |
202 | /* SUSv3: . and .. are not allowed as last components in various system | |
203 | calls. Don't test for backslash path separator since that's a Win32 | |
204 | path following Win32 rules. */ | |
284c5ea0 CF |
205 | const char *last_comp = strchr (dir, '\0'); |
206 | ||
207 | if (last_comp == dir) | |
208 | return false; /* Empty string. Probably shouldn't happen here? */ | |
209 | ||
210 | /* Detect run of trailing slashes */ | |
211 | while (last_comp > dir && *--last_comp == '/') | |
212 | continue; | |
213 | ||
214 | /* Detect just a run of slashes or a path that does not end with a slash. */ | |
215 | if (*last_comp != '.') | |
216 | return false; | |
217 | ||
218 | /* We know we have a trailing dot here. Check that it really is a standalone "." | |
219 | path component by checking that it is at the beginning of the string or is | |
220 | preceded by a "/" */ | |
221 | if (last_comp == dir || *--last_comp == '/') | |
222 | return true; | |
223 | ||
224 | /* If we're not checking for '..' we're done. Ditto if we're now pointing to | |
225 | a non-dot. */ | |
226 | if (!test_dot_dot || *last_comp != '.') | |
227 | return false; /* either not testing for .. or this was not '..' */ | |
228 | ||
229 | /* Repeat previous test for standalone or path component. */ | |
230 | return last_comp == dir || last_comp[-1] == '/'; | |
1870c688 CV |
231 | } |
232 | ||
233 | /* Normalize a POSIX path. | |
234 | All duplicate /'s, except for 2 leading /'s, are deleted. | |
235 | The result is 0 for success, or an errno error value. */ | |
236 | ||
237 | int | |
238 | normalize_posix_path (const char *src, char *dst, char *&tail) | |
239 | { | |
240 | const char *in_src = src; | |
241 | char *dst_start = dst; | |
242 | syscall_printf ("src %s", src); | |
243 | ||
244 | if ((isdrive (src) && isdirsep (src[2])) || *src == '\\') | |
245 | goto win32_path; | |
246 | ||
247 | tail = dst; | |
248 | if (!isslash (src[0])) | |
249 | { | |
250 | if (!cygheap->cwd.get (dst)) | |
251 | return get_errno (); | |
252 | tail = strchr (tail, '\0'); | |
253 | if (isslash (dst[0]) && isslash (dst[1])) | |
254 | ++dst_start; | |
255 | if (*src == '.') | |
256 | { | |
257 | if (tail == dst_start + 1 && *dst_start == '/') | |
258 | tail--; | |
259 | goto sawdot; | |
260 | } | |
261 | if (tail > dst && !isslash (tail[-1])) | |
262 | *tail++ = '/'; | |
263 | } | |
264 | /* Two leading /'s? If so, preserve them. */ | |
265 | else if (isslash (src[1]) && !isslash (src[2])) | |
266 | { | |
267 | *tail++ = *src++; | |
268 | ++dst_start; | |
274116ea CV |
269 | /* Is that a //?/ or //./ prefix into the native NT namespace? |
270 | If so, preserve it. */ | |
271 | if ((src[1] == '.' || src[1] == '?') && isslash (src[2])) | |
272 | { | |
273 | *tail++ = *src++; | |
274 | *tail++ = *src++; | |
275 | dst_start += 2; | |
276 | } | |
1870c688 | 277 | } |
b98ebf54 | 278 | |
1870c688 CV |
279 | while (*src) |
280 | { | |
281 | if (*src == '\\') | |
282 | goto win32_path; | |
283 | /* Strip runs of /'s. */ | |
284 | if (!isslash (*src)) | |
285 | *tail++ = *src++; | |
286 | else | |
287 | { | |
288 | while (*++src) | |
289 | { | |
290 | if (isslash (*src)) | |
291 | continue; | |
81adfe28 | 292 | |
1870c688 CV |
293 | if (*src != '.') |
294 | break; | |
81adfe28 | 295 | |
1870c688 CV |
296 | sawdot: |
297 | if (src[1] != '.') | |
298 | { | |
299 | if (!src[1]) | |
300 | { | |
301 | *tail++ = '/'; | |
302 | goto done; | |
303 | } | |
304 | if (!isslash (src[1])) | |
305 | break; | |
306 | } | |
307 | else if (src[2] && !isslash (src[2])) | |
308 | break; | |
309 | else | |
310 | { | |
311 | while (tail > dst_start && !isslash (*--tail)) | |
312 | continue; | |
313 | src++; | |
314 | } | |
315 | } | |
81adfe28 | 316 | |
b861c0a3 | 317 | *tail++ = '/'; |
1870c688 CV |
318 | } |
319 | if ((tail - dst) >= NT_MAX_PATH) | |
b98ebf54 | 320 | { |
1870c688 CV |
321 | debug_printf ("ENAMETOOLONG = normalize_posix_path (%s)", src); |
322 | return ENAMETOOLONG; | |
b98ebf54 | 323 | } |
1870c688 | 324 | } |
81adfe28 | 325 | |
1870c688 CV |
326 | done: |
327 | *tail = '\0'; | |
81adfe28 | 328 | |
1870c688 CV |
329 | debug_printf ("%s = normalize_posix_path (%s)", dst, in_src); |
330 | return 0; | |
81adfe28 | 331 | |
1870c688 CV |
332 | win32_path: |
333 | int err = normalize_win32_path (in_src, dst, tail); | |
334 | if (!err) | |
335 | for (char *p = dst; (p = strchr (p, '\\')); p++) | |
336 | *p = '/'; | |
337 | return err ?: -1; | |
338 | } | |
81adfe28 | 339 | |
1870c688 CV |
340 | inline void |
341 | path_conv::add_ext_from_sym (symlink_info &sym) | |
342 | { | |
343 | if (sym.ext_here && *sym.ext_here) | |
344 | { | |
345 | known_suffix = path + sym.extn; | |
346 | if (sym.ext_tacked_on) | |
fafbf755 | 347 | strcpy ((char *) known_suffix, sym.ext_here); |
1870c688 CV |
348 | } |
349 | } | |
350 | ||
fafbf755 CF |
351 | static void __stdcall mkrelpath (char *dst, bool caseinsensitive) |
352 | __attribute__ ((regparm (2))); | |
353 | ||
1870c688 | 354 | static void __stdcall |
e4b57503 | 355 | mkrelpath (char *path, bool caseinsensitive) |
1870c688 CV |
356 | { |
357 | tmp_pathbuf tp; | |
358 | char *cwd_win32 = tp.c_get (); | |
359 | if (!cygheap->cwd.get (cwd_win32, 0)) | |
360 | return; | |
361 | ||
362 | unsigned cwdlen = strlen (cwd_win32); | |
e4b57503 | 363 | if (!path_prefix_p (cwd_win32, path, cwdlen, caseinsensitive)) |
1870c688 CV |
364 | return; |
365 | ||
366 | size_t n = strlen (path); | |
367 | if (n < cwdlen) | |
368 | return; | |
369 | ||
370 | char *tail = path; | |
371 | if (n == cwdlen) | |
372 | tail += cwdlen; | |
373 | else | |
374 | tail += isdirsep (cwd_win32[cwdlen - 1]) ? cwdlen : cwdlen + 1; | |
375 | ||
376 | memmove (path, tail, strlen (tail) + 1); | |
377 | if (!*path) | |
378 | strcpy (path, "."); | |
379 | } | |
380 | ||
1870c688 CV |
381 | void |
382 | path_conv::set_normalized_path (const char *path_copy) | |
383 | { | |
0986989f | 384 | if (path_copy) |
1870c688 | 385 | { |
0986989f | 386 | size_t n = strlen (path_copy) + 1; |
412f3e61 | 387 | char *p = (char *) crealloc_abort ((void *) normalized_path, n); |
fafbf755 | 388 | normalized_path = (const char *) memcpy (p, path_copy, n); |
1870c688 | 389 | } |
1870c688 CV |
390 | } |
391 | ||
a22af4a9 CV |
392 | static inline void |
393 | str2uni_cat (UNICODE_STRING &tgt, const char *srcstr) | |
394 | { | |
395 | int len = sys_mbstowcs (tgt.Buffer + tgt.Length / sizeof (WCHAR), | |
396 | (tgt.MaximumLength - tgt.Length) / sizeof (WCHAR), | |
397 | srcstr); | |
398 | if (len) | |
399 | tgt.Length += (len - 1) * sizeof (WCHAR); | |
400 | } | |
401 | ||
1870c688 | 402 | PUNICODE_STRING |
8802178f | 403 | get_nt_native_path (const char *path, UNICODE_STRING& upath, bool dos) |
1870c688 CV |
404 | { |
405 | upath.Length = 0; | |
406 | if (path[0] == '/') /* special path w/o NT path representation. */ | |
407 | str2uni_cat (upath, path); | |
24790b9c | 408 | else if (path[0] != '\\') /* X:\... or relative path. */ |
1870c688 | 409 | { |
24790b9c | 410 | if (path[1] == ':') /* X:\... */ |
e4b57503 | 411 | { |
8deb4118 | 412 | RtlAppendUnicodeStringToString (&upath, &ro_u_natp); |
e4b57503 CV |
413 | str2uni_cat (upath, path); |
414 | /* The drive letter must be upper case. */ | |
415 | upath.Buffer[4] = towupper (upath.Buffer[4]); | |
416 | } | |
417 | else | |
418 | str2uni_cat (upath, path); | |
419 | transform_chars (&upath, 7); | |
1870c688 CV |
420 | } |
421 | else if (path[1] != '\\') /* \Device\... */ | |
422 | str2uni_cat (upath, path); | |
423 | else if ((path[2] != '.' && path[2] != '?') | |
424 | || path[3] != '\\') /* \\server\share\... */ | |
425 | { | |
8deb4118 | 426 | RtlAppendUnicodeStringToString (&upath, &ro_u_uncp); |
1870c688 | 427 | str2uni_cat (upath, path + 2); |
e4b57503 | 428 | transform_chars (&upath, 8); |
1870c688 CV |
429 | } |
430 | else /* \\.\device or \\?\foo */ | |
431 | { | |
8deb4118 | 432 | RtlAppendUnicodeStringToString (&upath, &ro_u_natp); |
1870c688 CV |
433 | str2uni_cat (upath, path + 4); |
434 | } | |
8802178f CV |
435 | if (dos) |
436 | { | |
437 | /* Unfortunately we can't just use transform_chars with the tfx_rev_chars | |
438 | table since only leading and trainlig spaces and dots are affected. | |
439 | So we step to every backslash and fix surrounding dots and spaces. | |
440 | That makes these broken filesystems a bit slower, but, hey. */ | |
441 | PWCHAR cp = upath.Buffer + 7; | |
442 | PWCHAR cend = upath.Buffer + upath.Length / sizeof (WCHAR); | |
443 | while (++cp < cend) | |
444 | if (*cp == L'\\') | |
445 | { | |
446 | PWCHAR ccp = cp - 1; | |
447 | while (*ccp == L'.' || *ccp == L' ') | |
448 | *ccp-- |= 0xf000; | |
449 | while (cp[1] == L' ') | |
450 | *++cp |= 0xf000; | |
451 | } | |
452 | while (*--cp == L'.' || *cp == L' ') | |
453 | *cp |= 0xf000; | |
454 | } | |
1870c688 CV |
455 | return &upath; |
456 | } | |
43b2d5ba | 457 | |
1870c688 CV |
458 | PUNICODE_STRING |
459 | path_conv::get_nt_native_path () | |
460 | { | |
461 | if (!wide_path) | |
462 | { | |
463 | uni_path.Length = 0; | |
464 | uni_path.MaximumLength = (strlen (path) + 10) * sizeof (WCHAR); | |
465 | wide_path = (PWCHAR) cmalloc_abort (HEAP_STR, uni_path.MaximumLength); | |
466 | uni_path.Buffer = wide_path; | |
5b4c992b | 467 | ::get_nt_native_path (path, uni_path, has_dos_filenames_only ()); |
1870c688 CV |
468 | } |
469 | return &uni_path; | |
470 | } | |
91d2f6ee | 471 | |
1870c688 CV |
472 | PWCHAR |
473 | path_conv::get_wide_win32_path (PWCHAR wc) | |
474 | { | |
475 | get_nt_native_path (); | |
ca027229 | 476 | if (!wide_path) |
1870c688 | 477 | return NULL; |
ca027229 CV |
478 | wcpcpy (wc, wide_path); |
479 | if (wc[1] == L'?') | |
480 | wc[1] = L'\\'; | |
1870c688 CV |
481 | return wc; |
482 | } | |
483 | ||
484 | void | |
485 | warn_msdos (const char *src) | |
486 | { | |
6612934a | 487 | if (user_shared->warned_msdos || !dos_file_warning || !cygwin_finished_initializing) |
1870c688 CV |
488 | return; |
489 | tmp_pathbuf tp; | |
490 | char *posix_path = tp.c_get (); | |
491 | small_printf ("cygwin warning:\n"); | |
492 | if (cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_RELATIVE, src, | |
493 | posix_path, NT_MAX_PATH)) | |
53a918f3 | 494 | small_printf (" MS-DOS style path detected: %ls\n POSIX equivalent preferred.\n", |
1870c688 CV |
495 | src); |
496 | else | |
53a918f3 | 497 | small_printf (" MS-DOS style path detected: %ls\n Preferred POSIX equivalent is: %ls\n", |
1870c688 CV |
498 | src, posix_path); |
499 | small_printf (" CYGWIN environment variable option \"nodosfilewarning\" turns off this warning.\n" | |
500 | " Consult the user's guide for more details about POSIX paths:\n" | |
501 | " http://cygwin.com/cygwin-ug-net/using.html#using-pathnames\n"); | |
502 | user_shared->warned_msdos = true; | |
503 | } | |
504 | ||
505 | static DWORD | |
e4b57503 | 506 | getfileattr (const char *path, bool caseinsensitive) /* path has to be always absolute. */ |
1870c688 CV |
507 | { |
508 | tmp_pathbuf tp; | |
509 | UNICODE_STRING upath; | |
510 | OBJECT_ATTRIBUTES attr; | |
511 | FILE_BASIC_INFORMATION fbi; | |
512 | NTSTATUS status; | |
513 | IO_STATUS_BLOCK io; | |
514 | ||
515 | tp.u_get (&upath); | |
e4b57503 CV |
516 | InitializeObjectAttributes (&attr, &upath, |
517 | caseinsensitive ? OBJ_CASE_INSENSITIVE : 0, | |
518 | NULL, NULL); | |
8802178f | 519 | get_nt_native_path (path, upath, false); |
1870c688 CV |
520 | |
521 | status = NtQueryAttributesFile (&attr, &fbi); | |
522 | if (NT_SUCCESS (status)) | |
523 | return fbi.FileAttributes; | |
524 | ||
525 | if (status != STATUS_OBJECT_NAME_NOT_FOUND | |
526 | && status != STATUS_NO_SUCH_FILE) /* File not found on 9x share */ | |
527 | { | |
528 | /* File exists but access denied. Try to get attribute through | |
529 | directory query. */ | |
530 | UNICODE_STRING dirname, basename; | |
531 | HANDLE dir; | |
3432d6f1 | 532 | FILE_BOTH_DIRECTORY_INFORMATION fdi; |
1870c688 CV |
533 | |
534 | RtlSplitUnicodePath (&upath, &dirname, &basename); | |
535 | InitializeObjectAttributes (&attr, &dirname, | |
e4b57503 CV |
536 | caseinsensitive ? OBJ_CASE_INSENSITIVE : 0, |
537 | NULL, NULL); | |
1870c688 CV |
538 | status = NtOpenFile (&dir, SYNCHRONIZE | FILE_LIST_DIRECTORY, |
539 | &attr, &io, FILE_SHARE_VALID_FLAGS, | |
540 | FILE_SYNCHRONOUS_IO_NONALERT | |
541 | | FILE_OPEN_FOR_BACKUP_INTENT | |
542 | | FILE_DIRECTORY_FILE); | |
543 | if (NT_SUCCESS (status)) | |
544 | { | |
545 | status = NtQueryDirectoryFile (dir, NULL, NULL, 0, &io, | |
546 | &fdi, sizeof fdi, | |
3432d6f1 | 547 | FileBothDirectoryInformation, |
1870c688 CV |
548 | TRUE, &basename, TRUE); |
549 | NtClose (dir); | |
550 | if (NT_SUCCESS (status) || status == STATUS_BUFFER_OVERFLOW) | |
551 | return fdi.FileAttributes; | |
552 | } | |
553 | } | |
554 | SetLastError (RtlNtStatusToDosError (status)); | |
555 | return INVALID_FILE_ATTRIBUTES; | |
556 | } | |
557 | ||
558 | /* Convert an arbitrary path SRC to a pure Win32 path, suitable for | |
559 | passing to Win32 API routines. | |
560 | ||
561 | If an error occurs, `error' is set to the errno value. | |
562 | Otherwise it is set to 0. | |
563 | ||
564 | follow_mode values: | |
565 | SYMLINK_FOLLOW - convert to PATH symlink points to | |
566 | SYMLINK_NOFOLLOW - convert to PATH of symlink itself | |
567 | SYMLINK_IGNORE - do not check PATH for symlinks | |
568 | SYMLINK_CONTENTS - just return symlink contents | |
569 | */ | |
570 | ||
571 | /* TODO: This implementation is only preliminary. For internal | |
572 | purposes it's necessary to have a path_conv::check function which | |
573 | takes a UNICODE_STRING src path, otherwise we waste a lot of time | |
574 | for converting back and forth. The below implementation does | |
575 | realy nothing but converting to char *, until path_conv handles | |
576 | wide-char paths directly. */ | |
577 | void | |
578 | path_conv::check (const UNICODE_STRING *src, unsigned opt, | |
579 | const suffix_info *suffixes) | |
580 | { | |
581 | tmp_pathbuf tp; | |
582 | char *path = tp.c_get (); | |
583 | ||
584 | user_shared->warned_msdos = true; | |
585 | sys_wcstombs (path, NT_MAX_PATH, src->Buffer, src->Length / sizeof (WCHAR)); | |
586 | path_conv::check (path, opt, suffixes); | |
587 | } | |
588 | ||
589 | void | |
590 | path_conv::check (const char *src, unsigned opt, | |
591 | const suffix_info *suffixes) | |
592 | { | |
593 | /* The tmp_buf array is used when expanding symlinks. It is NT_MAX_PATH * 2 | |
594 | in length so that we can hold the expanded symlink plus a trailer. */ | |
595 | tmp_pathbuf tp; | |
596 | char *path_copy = tp.c_get (); | |
597 | char *pathbuf = tp.c_get (); | |
598 | char *tmp_buf = tp.t_get (); | |
0986989f | 599 | char *THIS_path = tp.c_get (); |
1870c688 CV |
600 | symlink_info sym; |
601 | bool need_directory = 0; | |
602 | bool saw_symlinks = 0; | |
0986989f | 603 | bool add_ext = false; |
1870c688 CV |
604 | bool is_relpath; |
605 | char *tail, *path_end; | |
1fd5e000 | 606 | |
1870c688 CV |
607 | #if 0 |
608 | static path_conv last_path_conv; | |
609 | static char last_src[CYG_MAX_PATH]; | |
ad30b4ff | 610 | |
1870c688 CV |
611 | if (*last_src && strcmp (last_src, src) == 0) |
612 | { | |
613 | *this = last_path_conv; | |
ad30b4ff | 614 | return; |
1870c688 CV |
615 | } |
616 | #endif | |
ad30b4ff | 617 | |
1870c688 CV |
618 | myfault efault; |
619 | if (efault.faulted ()) | |
620 | { | |
621 | error = EFAULT; | |
622 | return; | |
623 | } | |
624 | int loop = 0; | |
625 | path_flags = 0; | |
626 | known_suffix = NULL; | |
627 | fileattr = INVALID_FILE_ATTRIBUTES; | |
e4b57503 | 628 | caseinsensitive = OBJ_CASE_INSENSITIVE; |
1870c688 CV |
629 | if (wide_path) |
630 | cfree (wide_path); | |
631 | wide_path = NULL; | |
0986989f | 632 | if (path) |
fafbf755 CF |
633 | { |
634 | cfree (modifiable_path ()); | |
635 | path = NULL; | |
636 | } | |
5a0d1edb | 637 | close_conv_handle (); |
1870c688 CV |
638 | memset (&dev, 0, sizeof (dev)); |
639 | fs.clear (); | |
0986989f | 640 | if (normalized_path) |
fafbf755 CF |
641 | { |
642 | cfree ((void *) normalized_path); | |
643 | normalized_path = NULL; | |
644 | } | |
1870c688 CV |
645 | int component = 0; // Number of translated components |
646 | ||
647 | if (!(opt & PC_NULLEMPTY)) | |
648 | error = 0; | |
649 | else if (!*src) | |
650 | { | |
651 | error = ENOENT; | |
652 | return; | |
653 | } | |
893ac8e0 | 654 | |
1870c688 CV |
655 | bool is_msdos = false; |
656 | /* This loop handles symlink expansion. */ | |
657 | for (;;) | |
658 | { | |
659 | MALLOC_CHECK; | |
660 | assert (src); | |
bbe009b7 | 661 | |
1870c688 CV |
662 | is_relpath = !isabspath (src); |
663 | error = normalize_posix_path (src, path_copy, tail); | |
664 | if (error > 0) | |
665 | return; | |
666 | if (error < 0) | |
667 | { | |
668 | if (component == 0) | |
669 | is_msdos = true; | |
670 | error = 0; | |
671 | } | |
1fd5e000 | 672 | |
1870c688 CV |
673 | /* Detect if the user was looking for a directory. We have to strip the |
674 | trailing slash initially while trying to add extensions but take it | |
675 | into account during processing */ | |
676 | if (tail > path_copy + 2 && isslash (tail[-1])) | |
677 | { | |
678 | need_directory = 1; | |
679 | *--tail = '\0'; | |
680 | } | |
681 | path_end = tail; | |
682 | ||
683 | /* Scan path_copy from right to left looking either for a symlink | |
684 | or an actual existing file. If an existing file is found, just | |
685 | return. If a symlink is found, exit the for loop. | |
686 | Also: be careful to preserve the errno returned from | |
687 | symlink.check as the caller may need it. */ | |
688 | /* FIXME: Do we have to worry about multiple \'s here? */ | |
689 | component = 0; // Number of translated components | |
690 | sym.contents[0] = '\0'; | |
691 | ||
692 | int symlen = 0; | |
693 | ||
5a0d1edb CV |
694 | for (unsigned pflags_or = opt & (PC_NO_ACCESS_CHECK | PC_KEEP_HANDLE); |
695 | ; | |
696 | pflags_or = 0) | |
1870c688 CV |
697 | { |
698 | const suffix_info *suff; | |
699 | char *full_path; | |
700 | ||
701 | /* Don't allow symlink.check to set anything in the path_conv | |
702 | class if we're working on an inner component of the path */ | |
703 | if (component) | |
704 | { | |
705 | suff = NULL; | |
1870c688 CV |
706 | full_path = pathbuf; |
707 | } | |
708 | else | |
709 | { | |
710 | suff = suffixes; | |
0986989f | 711 | full_path = THIS_path; |
1870c688 | 712 | } |
1fd5e000 | 713 | |
1870c688 CV |
714 | /* Convert to native path spec sans symbolic link info. */ |
715 | error = mount_table->conv_to_win32_path (path_copy, full_path, dev, | |
716 | &sym.pflags); | |
7ceb1cac | 717 | |
1870c688 CV |
718 | if (error) |
719 | return; | |
2b5803d4 | 720 | |
1870c688 | 721 | sym.pflags |= pflags_or; |
ac7bc2d4 | 722 | |
1870c688 CV |
723 | if (dev.major == DEV_CYGDRIVE_MAJOR) |
724 | { | |
725 | if (!component) | |
726 | fileattr = FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_READONLY; | |
727 | else | |
728 | { | |
0986989f | 729 | fileattr = getfileattr (THIS_path, |
e4b57503 | 730 | sym.pflags & MOUNT_NOPOSIX); |
1870c688 CV |
731 | dev.devn = FH_FS; |
732 | } | |
733 | goto out; | |
734 | } | |
735 | else if (dev == FH_DEV) | |
736 | { | |
737 | dev.devn = FH_FS; | |
4e993dc7 | 738 | #if 0 |
0986989f | 739 | fileattr = getfileattr (THIS_path, sym.pflags & MOUNT_NOPOSIX); |
1870c688 CV |
740 | if (!component && fileattr == INVALID_FILE_ATTRIBUTES) |
741 | { | |
742 | fileattr = FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_READONLY; | |
743 | goto out; | |
744 | } | |
4e993dc7 | 745 | #endif |
1870c688 CV |
746 | } |
747 | else if (isvirtual_dev (dev.devn)) | |
748 | { | |
749 | /* FIXME: Calling build_fhandler here is not the right way to handle this. */ | |
750 | fhandler_virtual *fh = (fhandler_virtual *) build_fh_dev (dev, path_copy); | |
43f65cdd CV |
751 | virtual_ftype_t file_type = fh->exists (); |
752 | if (file_type == virt_symlink) | |
1870c688 CV |
753 | { |
754 | fh->fill_filebuf (); | |
755 | symlen = sym.set (fh->get_filebuf ()); | |
756 | } | |
757 | delete fh; | |
758 | switch (file_type) | |
759 | { | |
43f65cdd CV |
760 | case virt_directory: |
761 | case virt_rootdir: | |
1870c688 CV |
762 | if (component == 0) |
763 | fileattr = FILE_ATTRIBUTE_DIRECTORY; | |
764 | break; | |
43f65cdd | 765 | case virt_file: |
1870c688 CV |
766 | if (component == 0) |
767 | fileattr = 0; | |
768 | break; | |
43f65cdd | 769 | case virt_symlink: |
1870c688 | 770 | goto is_virtual_symlink; |
43f65cdd | 771 | case virt_pipe: |
1870c688 CV |
772 | if (component == 0) |
773 | { | |
774 | fileattr = 0; | |
775 | dev.parse (FH_PIPE); | |
776 | } | |
777 | break; | |
43f65cdd | 778 | case virt_socket: |
1870c688 CV |
779 | if (component == 0) |
780 | { | |
781 | fileattr = 0; | |
782 | dev.parse (FH_TCP); | |
783 | } | |
784 | break; | |
43f65cdd CV |
785 | case virt_fsdir: |
786 | case virt_fsfile: | |
787 | /* Access to real file or directory via block device | |
788 | entry in /proc/sys. Convert to real file and go with | |
789 | the flow. */ | |
790 | dev.parse (FH_FS); | |
791 | goto is_fs_via_procsys; | |
792 | case virt_blk: | |
793 | /* Block special device. If the trailing slash has been | |
794 | requested, the target is the root directory of the | |
795 | filesystem on this block device. So we convert this to | |
796 | a real file and attach the backslash. */ | |
797 | if (component || need_directory) | |
798 | { | |
799 | dev.parse (FH_FS); | |
800 | if (component == 0) | |
801 | { | |
802 | strcat (full_path, "\\"); | |
803 | fileattr = FILE_ATTRIBUTE_DIRECTORY | |
804 | | FILE_ATTRIBUTE_DEVICE; | |
805 | } | |
806 | else | |
807 | fileattr = 0; | |
808 | goto out; | |
809 | } | |
810 | /*FALLTHRU*/ | |
811 | case virt_chr: | |
812 | if (component == 0) | |
813 | fileattr = FILE_ATTRIBUTE_DEVICE; | |
814 | break; | |
1870c688 CV |
815 | default: |
816 | if (component == 0) | |
817 | fileattr = INVALID_FILE_ATTRIBUTES; | |
818 | goto virtual_component_retry; | |
819 | } | |
820 | if (component == 0 || dev.devn != FH_NETDRIVE) | |
821 | path_flags |= PATH_RO; | |
822 | goto out; | |
823 | } | |
824 | /* devn should not be a device. If it is, then stop parsing now. */ | |
825 | else if (dev.devn != FH_FS) | |
826 | { | |
827 | fileattr = 0; | |
828 | path_flags = sym.pflags; | |
829 | if (component) | |
830 | { | |
831 | error = ENOTDIR; | |
832 | return; | |
833 | } | |
834 | goto out; /* Found a device. Stop parsing. */ | |
835 | } | |
2b5803d4 | 836 | |
1870c688 CV |
837 | /* If path is only a drivename, Windows interprets it as the |
838 | current working directory on this drive instead of the root | |
839 | dir which is what we want. So we need the trailing backslash | |
840 | in this case. */ | |
841 | if (full_path[0] && full_path[1] == ':' && full_path[2] == '\0') | |
842 | { | |
843 | full_path[2] = '\\'; | |
844 | full_path[3] = '\0'; | |
845 | } | |
274116ea CV |
846 | /* Otherwise, if the user requires a directory and explicitely |
847 | specified a path into the native NT namespace, add the trailing | |
848 | backslash. It's needed to access the root dir. */ | |
849 | else if (need_directory | |
850 | && full_path[0] == '\\' && full_path[1] == '\\' | |
851 | && (full_path[2] == '.' || full_path[2] == '?')) | |
852 | strcat (full_path, "\\"); | |
faf07ace | 853 | |
35c0485d CV |
854 | /* If the incoming path was given in DOS notation, always treat |
855 | it as caseinsensitive,noacl path. This must be set before | |
856 | calling sym.check, otherwise the path is potentially treated | |
857 | casesensitive. */ | |
858 | if (is_msdos) | |
859 | sym.pflags |= PATH_NOPOSIX | PATH_NOACL; | |
860 | ||
43f65cdd CV |
861 | is_fs_via_procsys: |
862 | ||
5a0d1edb | 863 | symlen = sym.check (full_path, suff, fs, conv_handle); |
7ac61736 | 864 | |
1870c688 | 865 | is_virtual_symlink: |
2cf9359a | 866 | |
1870c688 CV |
867 | if (sym.isdevice) |
868 | { | |
d955b6cf CV |
869 | if (component) |
870 | { | |
871 | error = ENOTDIR; | |
872 | return; | |
873 | } | |
1870c688 CV |
874 | dev.parse (sym.major, sym.minor); |
875 | dev.setfs (1); | |
876 | dev.mode = sym.mode; | |
877 | fileattr = sym.fileattr; | |
878 | goto out; | |
879 | } | |
70c370d6 | 880 | |
1870c688 CV |
881 | if (sym.pflags & PATH_SOCKET) |
882 | { | |
883 | if (component) | |
884 | { | |
885 | error = ENOTDIR; | |
886 | return; | |
887 | } | |
888 | fileattr = sym.fileattr; | |
889 | dev.parse (FH_UNIX); | |
890 | dev.setfs (1); | |
891 | goto out; | |
892 | } | |
fc633b63 | 893 | |
e4b57503 CV |
894 | if (!component) |
895 | { | |
896 | fileattr = sym.fileattr; | |
897 | path_flags = sym.pflags; | |
e4b57503 CV |
898 | } |
899 | ||
900 | /* If symlink.check found an existing non-symlink file, then | |
901 | it sets the appropriate flag. It also sets any suffix found | |
902 | into `ext_here'. */ | |
903 | if (!sym.issymlink && sym.fileattr != INVALID_FILE_ATTRIBUTES) | |
1870c688 | 904 | { |
e4b57503 CV |
905 | error = sym.error; |
906 | if (component == 0) | |
0986989f | 907 | add_ext = true; |
e4b57503 | 908 | else if (!(sym.fileattr & FILE_ATTRIBUTE_DIRECTORY)) |
1870c688 | 909 | { |
e4b57503 | 910 | error = ENOTDIR; |
1870c688 CV |
911 | goto out; |
912 | } | |
e4b57503 | 913 | goto out; // file found |
1870c688 | 914 | } |
e4b57503 CV |
915 | /* Found a symlink if symlen > 0. If component == 0, then the |
916 | src path itself was a symlink. If !follow_mode then | |
917 | we're done. Otherwise we have to insert the path found | |
918 | into the full path that we are building and perform all of | |
919 | these operations again on the newly derived path. */ | |
920 | else if (symlen > 0) | |
1870c688 | 921 | { |
e4b57503 CV |
922 | saw_symlinks = 1; |
923 | if (component == 0 && !need_directory && !(opt & PC_SYM_FOLLOW)) | |
1870c688 | 924 | { |
e4b57503 CV |
925 | set_symlink (symlen); // last component of path is a symlink. |
926 | if (opt & PC_SYM_CONTENTS) | |
1870c688 | 927 | { |
0986989f | 928 | strcpy (THIS_path, sym.contents); |
1870c688 CV |
929 | goto out; |
930 | } | |
0986989f | 931 | add_ext = true; |
1870c688 CV |
932 | goto out; |
933 | } | |
002a34fa CV |
934 | /* Following a symlink we can't trust the collected filesystem |
935 | information any longer. */ | |
936 | fs.clear (); | |
a6fc3a61 CV |
937 | /* Close handle, if we have any. Otherwise we're collecting |
938 | handles while following symlinks. */ | |
939 | conv_handle.close (); | |
002a34fa | 940 | break; |
1870c688 | 941 | } |
b98c66ee | 942 | else if (sym.error && sym.error != ENOENT) |
e4b57503 CV |
943 | { |
944 | error = sym.error; | |
945 | goto out; | |
946 | } | |
947 | /* No existing file found. */ | |
1fd5e000 | 948 | |
1870c688 CV |
949 | virtual_component_retry: |
950 | /* Find the new "tail" of the path, e.g. in '/for/bar/baz', | |
951 | /baz is the tail. */ | |
952 | if (tail != path_end) | |
953 | *tail = '/'; | |
954 | while (--tail > path_copy + 1 && *tail != '/') {} | |
955 | /* Exit loop if there is no tail or we are at the | |
956 | beginning of a UNC path */ | |
957 | if (tail <= path_copy + 1) | |
958 | goto out; // all done | |
959 | ||
960 | /* Haven't found an existing pathname component yet. | |
961 | Pinch off the tail and try again. */ | |
962 | *tail = '\0'; | |
963 | component++; | |
964 | } | |
1fd5e000 | 965 | |
1870c688 CV |
966 | /* Arrive here if above loop detected a symlink. */ |
967 | if (++loop > SYMLOOP_MAX) | |
968 | { | |
969 | error = ELOOP; // Eep. | |
970 | return; | |
971 | } | |
1fd5e000 | 972 | |
1870c688 | 973 | MALLOC_CHECK; |
fe6934da | 974 | |
7ceb1cac | 975 | |
1870c688 | 976 | /* Place the link content, possibly with head and/or tail, in tmp_buf */ |
1fd5e000 | 977 | |
1870c688 CV |
978 | char *headptr; |
979 | if (isabspath (sym.contents)) | |
980 | headptr = tmp_buf; /* absolute path */ | |
981 | else | |
982 | { | |
983 | /* Copy the first part of the path (with ending /) and point to the end. */ | |
984 | char *prevtail = tail; | |
985 | while (--prevtail > path_copy && *prevtail != '/') {} | |
986 | int headlen = prevtail - path_copy + 1;; | |
987 | memcpy (tmp_buf, path_copy, headlen); | |
988 | headptr = &tmp_buf[headlen]; | |
989 | } | |
1fd5e000 | 990 | |
1870c688 CV |
991 | /* Make sure there is enough space */ |
992 | if (headptr + symlen >= tmp_buf + (2 * NT_MAX_PATH)) | |
993 | { | |
994 | too_long: | |
995 | error = ENAMETOOLONG; | |
63168161 | 996 | set_path ("::ENAMETOOLONG::"); |
1870c688 CV |
997 | return; |
998 | } | |
e03f5f73 | 999 | |
1870c688 CV |
1000 | /* Copy the symlink contents to the end of tmp_buf. |
1001 | Convert slashes. */ | |
1002 | for (char *p = sym.contents; *p; p++) | |
1003 | *headptr++ = *p == '\\' ? '/' : *p; | |
1004 | *headptr = '\0'; | |
1005 | ||
1006 | /* Copy any tail component (with the 0) */ | |
1007 | if (tail++ < path_end) | |
1008 | { | |
1009 | /* Add a slash if needed. There is space. */ | |
1010 | if (*(headptr - 1) != '/') | |
1011 | *headptr++ = '/'; | |
1012 | int taillen = path_end - tail + 1; | |
1013 | if (headptr + taillen > tmp_buf + (2 * NT_MAX_PATH)) | |
1014 | goto too_long; | |
1015 | memcpy (headptr, tail, taillen); | |
1016 | } | |
70300fdb | 1017 | |
1870c688 CV |
1018 | /* Evaluate everything all over again. */ |
1019 | src = tmp_buf; | |
1020 | } | |
b63a3f55 | 1021 | |
1870c688 | 1022 | if (!(opt & PC_SYM_CONTENTS)) |
0986989f | 1023 | add_ext = true; |
fc672fb2 | 1024 | |
1870c688 | 1025 | out: |
fafbf755 | 1026 | set_path (THIS_path); |
0986989f CV |
1027 | if (add_ext) |
1028 | add_ext_from_sym (sym); | |
1870c688 CV |
1029 | if (dev.devn == FH_NETDRIVE && component) |
1030 | { | |
1031 | /* This case indicates a non-existant resp. a non-retrievable | |
1032 | share. This happens for instance if the share is a printer. | |
1033 | In this case the path must not be treated like a FH_NETDRIVE, | |
1034 | but like a FH_FS instead, so the usual open call for files | |
1035 | is used on it. */ | |
1036 | dev.parse (FH_FS); | |
1037 | } | |
1038 | else if (isvirtual_dev (dev.devn) && fileattr == INVALID_FILE_ATTRIBUTES) | |
1039 | { | |
b98c66ee | 1040 | error = ENOENT; |
1870c688 CV |
1041 | return; |
1042 | } | |
1043 | else if (!need_directory || error) | |
1044 | /* nothing to do */; | |
1045 | else if (fileattr == INVALID_FILE_ATTRIBUTES) | |
fafbf755 | 1046 | strcat (modifiable_path (), "\\"); /* Reattach trailing dirsep in native path. */ |
1870c688 CV |
1047 | else if (fileattr & FILE_ATTRIBUTE_DIRECTORY) |
1048 | path_flags &= ~PATH_SYMLINK; | |
1049 | else | |
1050 | { | |
1051 | debug_printf ("%s is a non-directory", path); | |
1052 | error = ENOTDIR; | |
1053 | return; | |
1054 | } | |
95a8465b | 1055 | |
1870c688 CV |
1056 | if (dev.isfs ()) |
1057 | { | |
1058 | if (strncmp (path, "\\\\.\\", 4)) | |
1059 | { | |
1060 | if (!tail || tail == path) | |
1061 | /* nothing */; | |
1062 | else if (tail[-1] != '\\') | |
1063 | *tail = '\0'; | |
1064 | else | |
1065 | { | |
1066 | error = ENOENT; | |
1067 | return; | |
1068 | } | |
1069 | } | |
91a2f87b | 1070 | |
002a34fa CV |
1071 | /* If FS hasn't been checked already in symlink_info::check, do so now. */ |
1072 | if (fs.inited ()|| fs.update (get_nt_native_path (), NULL)) | |
1870c688 | 1073 | { |
292c9974 CV |
1074 | /* Incoming DOS paths are treated like DOS paths in native |
1075 | Windows applications. No ACLs, just default settings. */ | |
1076 | if (is_msdos) | |
1077 | fs.has_acls (false); | |
1870c688 | 1078 | debug_printf ("this->path(%s), has_acls(%d)", path, fs.has_acls ()); |
fa986bf9 CV |
1079 | /* CV: We could use this->has_acls() but I want to make sure that |
1080 | we don't forget that the PATH_NOACL flag must be taken into | |
1081 | account here. */ | |
1082 | if (!(path_flags & PATH_NOACL) && fs.has_acls ()) | |
1870c688 CV |
1083 | set_exec (0); /* We really don't know if this is executable or not here |
1084 | but set it to not executable since it will be figured out | |
1085 | later by anything which cares about this. */ | |
1086 | } | |
6259826e CF |
1087 | /* If the FS has been found to have unrelibale inodes, note |
1088 | that in path_flags. */ | |
1089 | if (!fs.hasgood_inode ()) | |
1090 | path_flags |= PATH_IHASH; | |
1091 | /* If the OS is caseinsensitive or the FS is caseinsensitive, | |
1092 | don't handle path casesensitive. */ | |
1093 | if (cygwin_shared->obcaseinsensitive || fs.caseinsensitive ()) | |
1094 | path_flags |= PATH_NOPOSIX; | |
1095 | caseinsensitive = (path_flags & PATH_NOPOSIX) | |
1096 | ? OBJ_CASE_INSENSITIVE : 0; | |
1870c688 CV |
1097 | if (exec_state () != dont_know_if_executable) |
1098 | /* ok */; | |
1099 | else if (isdir ()) | |
1100 | set_exec (1); | |
1101 | else if (issymlink () || issocket ()) | |
1102 | set_exec (0); | |
1103 | } | |
95a8465b | 1104 | |
1870c688 CV |
1105 | if (opt & PC_NOFULL) |
1106 | { | |
1107 | if (is_relpath) | |
2348e4f3 | 1108 | { |
fafbf755 | 1109 | mkrelpath (this->modifiable_path (), !!caseinsensitive); |
2348e4f3 CV |
1110 | /* Invalidate wide_path so that wide relpath can be created |
1111 | in later calls to get_nt_native_path or get_wide_win32_path. */ | |
1112 | if (wide_path) | |
1113 | cfree (wide_path); | |
1114 | wide_path = NULL; | |
1115 | } | |
1870c688 CV |
1116 | if (need_directory) |
1117 | { | |
1118 | size_t n = strlen (this->path); | |
1119 | /* Do not add trailing \ to UNC device names like \\.\a: */ | |
1120 | if (this->path[n - 1] != '\\' && | |
1121 | (strncmp (this->path, "\\\\.\\", 4) != 0)) | |
1122 | { | |
fafbf755 CF |
1123 | this->modifiable_path ()[n] = '\\'; |
1124 | this->modifiable_path ()[n + 1] = '\0'; | |
1870c688 CV |
1125 | } |
1126 | } | |
1127 | } | |
7ac61736 | 1128 | |
1870c688 CV |
1129 | if (saw_symlinks) |
1130 | set_has_symlinks (); | |
a888c079 | 1131 | |
0986989f | 1132 | if ((opt & PC_POSIX)) |
1870c688 CV |
1133 | { |
1134 | if (tail < path_end && tail > path_copy + 1) | |
1135 | *tail = '/'; | |
1136 | set_normalized_path (path_copy); | |
1137 | if (is_msdos && !(opt & PC_NOWARN)) | |
1138 | warn_msdos (src); | |
1139 | } | |
81adfe28 CF |
1140 | |
1141 | #if 0 | |
1870c688 CV |
1142 | if (!error) |
1143 | { | |
1144 | last_path_conv = *this; | |
1145 | strcpy (last_src, src); | |
1146 | } | |
81adfe28 | 1147 | #endif |
1870c688 | 1148 | } |
81adfe28 | 1149 | |
1870c688 CV |
1150 | path_conv::~path_conv () |
1151 | { | |
0986989f | 1152 | if (normalized_path) |
1870c688 | 1153 | { |
fafbf755 | 1154 | cfree ((void *) normalized_path); |
1870c688 CV |
1155 | normalized_path = NULL; |
1156 | } | |
0986989f CV |
1157 | if (path) |
1158 | { | |
fafbf755 | 1159 | cfree (modifiable_path ()); |
0986989f CV |
1160 | path = NULL; |
1161 | } | |
1870c688 CV |
1162 | if (wide_path) |
1163 | { | |
1164 | cfree (wide_path); | |
1165 | wide_path = NULL; | |
1166 | } | |
5a0d1edb | 1167 | close_conv_handle (); |
1870c688 CV |
1168 | } |
1169 | ||
1170 | bool | |
1171 | path_conv::is_binary () | |
1172 | { | |
1173 | tmp_pathbuf tp; | |
1174 | PWCHAR bintest = tp.w_get (); | |
1175 | DWORD bin; | |
c32849c5 | 1176 | |
3bee7767 CV |
1177 | return GetBinaryTypeW (get_wide_win32_path (bintest), &bin) |
1178 | && (bin == SCS_32BIT_BINARY || bin == SCS_64BIT_BINARY); | |
1870c688 CV |
1179 | } |
1180 | ||
1181 | /* Normalize a Win32 path. | |
1182 | /'s are converted to \'s in the process. | |
1183 | All duplicate \'s, except for 2 leading \'s, are deleted. | |
1184 | ||
1185 | The result is 0 for success, or an errno error value. | |
1186 | FIXME: A lot of this should be mergeable with the POSIX critter. */ | |
1187 | int | |
1188 | normalize_win32_path (const char *src, char *dst, char *&tail) | |
1189 | { | |
1190 | const char *src_start = src; | |
1191 | bool beg_src_slash = isdirsep (src[0]); | |
1192 | ||
1193 | tail = dst; | |
1194 | /* Skip long path name prefixes in Win32 or NT syntax. */ | |
1195 | if (beg_src_slash && (src[1] == '?' || isdirsep (src[1])) | |
1196 | && src[2] == '?' && isdirsep (src[3])) | |
1197 | { | |
1198 | src += 4; | |
1199 | if (src[1] != ':') /* native UNC path */ | |
1d011c0a | 1200 | src += 2; /* Fortunately the first char is not copied... */ |
1870c688 | 1201 | else |
1d011c0a | 1202 | beg_src_slash = false; |
1870c688 CV |
1203 | } |
1204 | if (beg_src_slash && isdirsep (src[1])) | |
1205 | { | |
1206 | if (isdirsep (src[2])) | |
1207 | { | |
1208 | /* More than two slashes are just folded into one. */ | |
81adfe28 | 1209 | src += 2; |
1870c688 CV |
1210 | while (isdirsep (src[1])) |
1211 | ++src; | |
1212 | } | |
1213 | else | |
1214 | { | |
1215 | /* Two slashes start a network or device path. */ | |
1216 | *tail++ = '\\'; | |
1217 | src++; | |
1218 | if (src[1] == '.' && isdirsep (src[2])) | |
1219 | { | |
81adfe28 | 1220 | *tail++ = '\\'; |
1870c688 CV |
1221 | *tail++ = '.'; |
1222 | src += 2; | |
1223 | } | |
1224 | } | |
1225 | } | |
54a83cc6 | 1226 | if (tail == dst) |
1870c688 | 1227 | { |
54a83cc6 CV |
1228 | if (isdrive (src)) |
1229 | /* Always convert drive letter to uppercase for case sensitivity. */ | |
1230 | *tail++ = cyg_toupper (*src++); | |
1231 | else if (*src != '/') | |
1870c688 | 1232 | { |
54a83cc6 CV |
1233 | if (beg_src_slash) |
1234 | tail += cygheap->cwd.get_drive (dst); | |
1235 | else if (!cygheap->cwd.get (dst, 0)) | |
1236 | return get_errno (); | |
1237 | else | |
1238 | { | |
1239 | tail = strchr (tail, '\0'); | |
1240 | if (tail[-1] != '\\') | |
1241 | *tail++ = '\\'; | |
1242 | } | |
1870c688 CV |
1243 | } |
1244 | } | |
81adfe28 | 1245 | |
1870c688 CV |
1246 | while (*src) |
1247 | { | |
1248 | /* Strip duplicate /'s. */ | |
1249 | if (isdirsep (src[0]) && isdirsep (src[1])) | |
1250 | src++; | |
1251 | /* Ignore "./". */ | |
1252 | else if (src[0] == '.' && isdirsep (src[1]) | |
1253 | && (src == src_start || isdirsep (src[-1]))) | |
1254 | src += 2; | |
1255 | ||
1256 | /* Backup if "..". */ | |
1257 | else if (src[0] == '.' && src[1] == '.' | |
1258 | /* dst must be greater than dst_start */ | |
1259 | && tail[-1] == '\\') | |
1260 | { | |
1261 | if (!isdirsep (src[2]) && src[2] != '\0') | |
1262 | *tail++ = *src++; | |
1263 | else | |
1264 | { | |
1265 | /* Back up over /, but not if it's the first one. */ | |
1266 | if (tail > dst + 1) | |
1267 | tail--; | |
1268 | /* Now back up to the next /. */ | |
1269 | while (tail > dst + 1 && tail[-1] != '\\' && tail[-2] != ':') | |
1270 | tail--; | |
1271 | src += 2; | |
1272 | if (isdirsep (*src)) | |
1273 | src++; | |
1274 | } | |
1275 | } | |
1276 | /* Otherwise, add char to result. */ | |
1277 | else | |
1278 | { | |
1279 | if (*src == '/') | |
1280 | *tail++ = '\\'; | |
1281 | else | |
1282 | *tail++ = *src; | |
1283 | src++; | |
1284 | } | |
1285 | if ((tail - dst) >= NT_MAX_PATH) | |
1286 | return ENAMETOOLONG; | |
1287 | } | |
1288 | if (tail > dst + 1 && tail[-1] == '.' && tail[-2] == '\\') | |
1289 | tail--; | |
1290 | *tail = '\0'; | |
1291 | debug_printf ("%s = normalize_win32_path (%s)", dst, src_start); | |
1292 | return 0; | |
1293 | } | |
1294 | ||
1295 | /* Various utilities. */ | |
1296 | ||
1297 | /* nofinalslash: Remove trailing / and \ from SRC (except for the | |
1298 | first one). It is ok for src == dst. */ | |
1299 | ||
1300 | void __stdcall | |
1301 | nofinalslash (const char *src, char *dst) | |
1302 | { | |
1303 | int len = strlen (src); | |
1304 | if (src != dst) | |
1305 | memcpy (dst, src, len + 1); | |
1306 | while (len > 1 && isdirsep (dst[--len])) | |
1307 | dst[len] = '\0'; | |
1308 | } | |
1309 | ||
1310 | /* conv_path_list: Convert a list of path names to/from Win32/POSIX. */ | |
1311 | ||
1312 | static int | |
1313 | conv_path_list (const char *src, char *dst, size_t size, int to_posix) | |
1314 | { | |
1315 | tmp_pathbuf tp; | |
1316 | char src_delim, dst_delim; | |
1317 | cygwin_conv_path_t conv_fn; | |
1318 | size_t len; | |
1319 | ||
1320 | if (to_posix) | |
1321 | { | |
1322 | src_delim = ';'; | |
1323 | dst_delim = ':'; | |
1324 | conv_fn = CCP_WIN_A_TO_POSIX | CCP_RELATIVE; | |
1325 | } | |
1326 | else | |
1327 | { | |
1328 | src_delim = ':'; | |
1329 | dst_delim = ';'; | |
1330 | conv_fn = CCP_POSIX_TO_WIN_A | CCP_RELATIVE; | |
1331 | } | |
81adfe28 | 1332 | |
1870c688 CV |
1333 | char *srcbuf; |
1334 | len = strlen (src) + 1; | |
1335 | if (len <= NT_MAX_PATH * sizeof (WCHAR)) | |
1336 | srcbuf = (char *) tp.w_get (); | |
1337 | else | |
1338 | srcbuf = (char *) alloca (len); | |
1339 | ||
1340 | int err = 0; | |
1341 | char *d = dst - 1; | |
1342 | bool saw_empty = false; | |
1343 | do | |
1344 | { | |
1345 | char *s = strccpy (srcbuf, &src, src_delim); | |
1346 | size_t len = s - srcbuf; | |
1347 | if (len >= NT_MAX_PATH) | |
1348 | { | |
1349 | err = ENAMETOOLONG; | |
81adfe28 | 1350 | break; |
1870c688 CV |
1351 | } |
1352 | if (len) | |
1353 | { | |
1354 | ++d; | |
1355 | err = cygwin_conv_path (conv_fn, srcbuf, d, size - (d - dst)); | |
1356 | } | |
1357 | else if (!to_posix) | |
1358 | { | |
1359 | ++d; | |
1360 | err = cygwin_conv_path (conv_fn, ".", d, size - (d - dst)); | |
1361 | } | |
1362 | else | |
1363 | { | |
1364 | if (to_posix == ENV_CVT) | |
1365 | saw_empty = true; | |
1366 | continue; | |
1367 | } | |
1368 | if (err) | |
1369 | break; | |
1370 | d = strchr (d, '\0'); | |
1371 | *d = dst_delim; | |
1372 | } | |
1373 | while (*src++); | |
1374 | ||
1375 | if (saw_empty) | |
1376 | err = EIDRM; | |
1377 | ||
1378 | if (d < dst) | |
1379 | d++; | |
1380 | *d = '\0'; | |
1381 | return err; | |
1382 | } | |
1383 | ||
1384 | /********************** Symbolic Link Support **************************/ | |
1385 | ||
1386 | /* Create a symlink from FROMPATH to TOPATH. */ | |
1387 | ||
1388 | /* If TRUE create symlinks as Windows shortcuts, if false create symlinks | |
1389 | as normal files with magic number and system bit set. */ | |
a0c53f92 | 1390 | bool allow_winsymlinks = false; |
1870c688 CV |
1391 | |
1392 | extern "C" int | |
1393 | symlink (const char *oldpath, const char *newpath) | |
1394 | { | |
1395 | return symlink_worker (oldpath, newpath, allow_winsymlinks, false); | |
1396 | } | |
1397 | ||
1398 | int | |
1399 | symlink_worker (const char *oldpath, const char *newpath, bool use_winsym, | |
1400 | bool isdevice) | |
1401 | { | |
1402 | int res = -1; | |
1403 | size_t len; | |
1404 | path_conv win32_newpath, win32_oldpath; | |
1405 | char *buf, *cp; | |
1406 | SECURITY_ATTRIBUTES sa = sec_none_nih; | |
1870c688 CV |
1407 | OBJECT_ATTRIBUTES attr; |
1408 | IO_STATUS_BLOCK io; | |
1409 | NTSTATUS status; | |
1410 | HANDLE fh; | |
1870c688 | 1411 | tmp_pathbuf tp; |
025c1fac | 1412 | unsigned check_opt; |
0fb0fb83 | 1413 | bool mk_winsym = use_winsym; |
4401b147 | 1414 | bool has_trailing_dirsep = false; |
1870c688 CV |
1415 | |
1416 | /* POSIX says that empty 'newpath' is invalid input while empty | |
1417 | 'oldpath' is valid -- it's symlink resolver job to verify if | |
1418 | symlink contents point to existing filesystem object */ | |
1419 | myfault efault; | |
1420 | if (efault.faulted (EFAULT)) | |
1421 | goto done; | |
1422 | if (!*oldpath || !*newpath) | |
1423 | { | |
1424 | set_errno (ENOENT); | |
1425 | goto done; | |
1426 | } | |
81adfe28 | 1427 | |
1870c688 CV |
1428 | if (strlen (oldpath) > SYMLINK_MAX) |
1429 | { | |
1430 | set_errno (ENAMETOOLONG); | |
1431 | goto done; | |
1432 | } | |
81adfe28 | 1433 | |
1870c688 | 1434 | /* Trailing dirsep is a no-no. */ |
4401b147 CV |
1435 | len = strlen (newpath); |
1436 | has_trailing_dirsep = isdirsep (newpath[len - 1]); | |
1437 | if (has_trailing_dirsep) | |
1870c688 | 1438 | { |
4401b147 CV |
1439 | newpath = strdup (newpath); |
1440 | ((char *) newpath)[len - 1] = '\0'; | |
1870c688 | 1441 | } |
025c1fac CF |
1442 | |
1443 | check_opt = PC_SYM_NOFOLLOW | PC_POSIX | (isdevice ? PC_NOWARN : 0); | |
1870c688 | 1444 | /* We need the normalized full path below. */ |
025c1fac | 1445 | win32_newpath.check (newpath, check_opt, stat_suffixes); |
0fb0fb83 CV |
1446 | /* MVFS doesn't handle the SYSTEM DOS attribute, but it handles the R/O |
1447 | attribute. Therefore we create symlinks on MVFS always as shortcuts. */ | |
1448 | mk_winsym |= win32_newpath.fs_is_mvfs (); | |
1449 | ||
1450 | if (mk_winsym && !win32_newpath.exists () | |
1870c688 CV |
1451 | && (isdevice || !win32_newpath.fs_is_nfs ())) |
1452 | { | |
1453 | char *newplnk = tp.c_get (); | |
1454 | stpcpy (stpcpy (newplnk, newpath), ".lnk"); | |
025c1fac | 1455 | win32_newpath.check (newplnk, check_opt); |
1870c688 | 1456 | } |
81adfe28 | 1457 | |
1870c688 CV |
1458 | if (win32_newpath.error) |
1459 | { | |
e4b57503 | 1460 | set_errno (win32_newpath.error); |
1870c688 CV |
1461 | goto done; |
1462 | } | |
81adfe28 | 1463 | |
1870c688 CV |
1464 | syscall_printf ("symlink (%s, %S)", oldpath, |
1465 | win32_newpath.get_nt_native_path ()); | |
81adfe28 | 1466 | |
1870c688 CV |
1467 | if ((!isdevice && win32_newpath.exists ()) |
1468 | || win32_newpath.is_auto_device ()) | |
1469 | { | |
1470 | set_errno (EEXIST); | |
1471 | goto done; | |
1472 | } | |
4401b147 CV |
1473 | if (has_trailing_dirsep && !win32_newpath.exists ()) |
1474 | { | |
1475 | set_errno (ENOENT); | |
1476 | goto done; | |
1477 | } | |
81adfe28 | 1478 | |
1870c688 CV |
1479 | if (!isdevice && win32_newpath.fs_is_nfs ()) |
1480 | { | |
1481 | /* On NFS, create symlinks by calling NtCreateFile with an EA of type | |
1482 | NfsSymlinkTargetName containing ... the symlink target name. */ | |
1483 | PFILE_FULL_EA_INFORMATION pffei = (PFILE_FULL_EA_INFORMATION) tp.w_get (); | |
1484 | pffei->NextEntryOffset = 0; | |
1485 | pffei->Flags = 0; | |
1486 | pffei->EaNameLength = sizeof (NFS_SYML_TARGET) - 1; | |
1487 | char *EaValue = stpcpy (pffei->EaName, NFS_SYML_TARGET) + 1; | |
1488 | pffei->EaValueLength = sizeof (WCHAR) * | |
1489 | (sys_mbstowcs ((PWCHAR) EaValue, NT_MAX_PATH, oldpath) - 1); | |
1490 | status = NtCreateFile (&fh, FILE_WRITE_DATA | FILE_WRITE_EA | SYNCHRONIZE, | |
1491 | win32_newpath.get_object_attr (attr, sa), | |
1492 | &io, NULL, FILE_ATTRIBUTE_SYSTEM, | |
1493 | FILE_SHARE_VALID_FLAGS, FILE_CREATE, | |
1494 | FILE_SYNCHRONOUS_IO_NONALERT | |
1495 | | FILE_OPEN_FOR_BACKUP_INTENT, | |
1496 | pffei, NT_MAX_PATH * sizeof (WCHAR)); | |
1497 | if (!NT_SUCCESS (status)) | |
1498 | { | |
1499 | __seterrno_from_nt_status (status); | |
1500 | goto done; | |
1501 | } | |
1502 | NtClose (fh); | |
1503 | res = 0; | |
81adfe28 | 1504 | goto done; |
1870c688 | 1505 | } |
81adfe28 | 1506 | |
0fb0fb83 | 1507 | if (mk_winsym) |
1870c688 CV |
1508 | { |
1509 | ITEMIDLIST *pidl = NULL; | |
1510 | size_t full_len = 0; | |
1511 | unsigned short oldpath_len, desc_len, relpath_len, pidl_len = 0; | |
1512 | char desc[MAX_PATH + 1], *relpath; | |
1513 | ||
1514 | if (!isdevice) | |
1515 | { | |
1516 | /* First create an IDLIST to learn how big our shortcut is | |
1517 | going to be. */ | |
1518 | IShellFolder *psl; | |
1519 | ||
1520 | /* The symlink target is relative to the directory in which | |
1521 | the symlink gets created, not relative to the cwd. Therefore | |
1522 | we have to mangle the path quite a bit before calling path_conv. */ | |
025c1fac CF |
1523 | if (isabspath (oldpath)) |
1524 | win32_oldpath.check (oldpath, | |
1525 | PC_SYM_NOFOLLOW, | |
1526 | stat_suffixes); | |
1527 | else | |
1870c688 CV |
1528 | { |
1529 | len = strrchr (win32_newpath.normalized_path, '/') | |
1530 | - win32_newpath.normalized_path + 1; | |
1531 | char *absoldpath = tp.t_get (); | |
1532 | stpcpy (stpncpy (absoldpath, win32_newpath.normalized_path, len), | |
1533 | oldpath); | |
1534 | win32_oldpath.check (absoldpath, PC_SYM_NOFOLLOW, stat_suffixes); | |
1535 | } | |
1870c688 CV |
1536 | if (SUCCEEDED (SHGetDesktopFolder (&psl))) |
1537 | { | |
1538 | WCHAR wc_path[win32_oldpath.get_wide_win32_path_len () + 1]; | |
1539 | win32_oldpath.get_wide_win32_path (wc_path); | |
1540 | /* Amazing but true: Even though the ParseDisplayName method | |
1541 | takes a wide char path name, it does not understand the | |
1542 | Win32 prefix for long pathnames! So we have to tack off | |
1543 | the prefix and convert the path to the "normal" syntax | |
1544 | for ParseDisplayName. */ | |
1545 | WCHAR *wc = wc_path + 4; | |
1546 | if (wc[1] != L':') /* native UNC path */ | |
1547 | *(wc += 2) = L'\\'; | |
1548 | HRESULT res; | |
1549 | if (SUCCEEDED (res = psl->ParseDisplayName (NULL, NULL, wc, NULL, | |
1550 | &pidl, NULL))) | |
1551 | { | |
1552 | ITEMIDLIST *p; | |
81adfe28 | 1553 | |
1870c688 CV |
1554 | for (p = pidl; p->mkid.cb > 0; |
1555 | p = (ITEMIDLIST *)((char *) p + p->mkid.cb)) | |
1556 | ; | |
1557 | pidl_len = (char *) p - (char *) pidl + 2; | |
1558 | } | |
1559 | psl->Release (); | |
1560 | } | |
1561 | } | |
1562 | /* Compute size of shortcut file. */ | |
1563 | full_len = sizeof (win_shortcut_hdr); | |
1564 | if (pidl_len) | |
1565 | full_len += sizeof (unsigned short) + pidl_len; | |
1566 | oldpath_len = strlen (oldpath); | |
1567 | /* Unfortunately the length of the description is restricted to a | |
1568 | length of MAX_PATH up to NT4, and to a length of 2000 bytes | |
1569 | since W2K. We don't want to add considerations for the different | |
1570 | lengths and even 2000 bytes is not enough for long path names. | |
1571 | So what we do here is to set the description to the POSIX path | |
1572 | only if the path is not longer than MAX_PATH characters. We | |
1573 | append the full path name after the regular shortcut data | |
1574 | (see below), which works fine with Windows Explorer as well | |
1575 | as older Cygwin versions (as long as the whole file isn't bigger | |
1576 | than 8K). The description field is only used for backward | |
1577 | compatibility to older Cygwin versions and those versions are | |
1578 | not capable of handling long path names anyway. */ | |
1579 | desc_len = stpcpy (desc, oldpath_len > MAX_PATH | |
1580 | ? "[path too long]" : oldpath) - desc; | |
1581 | full_len += sizeof (unsigned short) + desc_len; | |
1582 | /* Devices get the oldpath string unchanged as relative path. */ | |
1583 | if (isdevice) | |
1584 | { | |
1585 | relpath_len = oldpath_len; | |
1586 | stpcpy (relpath = tp.c_get (), oldpath); | |
1587 | } | |
1588 | else | |
1589 | { | |
1590 | relpath_len = strlen (win32_oldpath.get_win32 ()); | |
1591 | stpcpy (relpath = tp.c_get (), win32_oldpath.get_win32 ()); | |
1592 | } | |
1593 | full_len += sizeof (unsigned short) + relpath_len; | |
1594 | full_len += sizeof (unsigned short) + oldpath_len; | |
1595 | /* 1 byte more for trailing 0 written by stpcpy. */ | |
1596 | if (full_len < NT_MAX_PATH * sizeof (WCHAR)) | |
1597 | buf = (char *) tp.w_get (); | |
1598 | else | |
1599 | buf = (char *) alloca (full_len + 1); | |
1600 | ||
1601 | /* Create shortcut header */ | |
1602 | win_shortcut_hdr *shortcut_header = (win_shortcut_hdr *) buf; | |
1603 | memset (shortcut_header, 0, sizeof *shortcut_header); | |
1604 | shortcut_header->size = sizeof *shortcut_header; | |
1605 | shortcut_header->magic = GUID_shortcut; | |
1606 | shortcut_header->flags = (WSH_FLAG_DESC | WSH_FLAG_RELPATH); | |
1607 | if (pidl) | |
1608 | shortcut_header->flags |= WSH_FLAG_IDLIST; | |
1609 | shortcut_header->run = SW_NORMAL; | |
1610 | cp = buf + sizeof (win_shortcut_hdr); | |
1611 | ||
1612 | /* Create IDLIST */ | |
1613 | if (pidl) | |
1614 | { | |
1615 | *(unsigned short *)cp = pidl_len; | |
1616 | memcpy (cp += 2, pidl, pidl_len); | |
1617 | cp += pidl_len; | |
1618 | CoTaskMemFree (pidl); | |
1619 | } | |
81adfe28 | 1620 | |
1870c688 CV |
1621 | /* Create description */ |
1622 | *(unsigned short *)cp = desc_len; | |
1623 | cp = stpcpy (cp += 2, desc); | |
81adfe28 | 1624 | |
1870c688 CV |
1625 | /* Create relpath */ |
1626 | *(unsigned short *)cp = relpath_len; | |
1627 | cp = stpcpy (cp += 2, relpath); | |
81adfe28 | 1628 | |
1870c688 CV |
1629 | /* Append the POSIX path after the regular shortcut data for |
1630 | the long path support. */ | |
4d9c7280 CV |
1631 | unsigned short *plen = (unsigned short *) cp; |
1632 | cp += 2; | |
1633 | *(PWCHAR) cp = 0xfeff; /* BOM */ | |
1634 | cp += 2; | |
1635 | *plen = sys_mbstowcs ((PWCHAR) cp, NT_MAX_PATH, oldpath) * sizeof (WCHAR); | |
1636 | cp += *plen; | |
1870c688 CV |
1637 | } |
1638 | else | |
1639 | { | |
4d9c7280 CV |
1640 | /* Default technique creating a symlink. */ |
1641 | buf = (char *) tp.w_get (); | |
1642 | cp = stpcpy (buf, SYMLINK_COOKIE); | |
1643 | *(PWCHAR) cp = 0xfeff; /* BOM */ | |
1644 | cp += 2; | |
1870c688 | 1645 | /* Note that the terminating nul is written. */ |
4d9c7280 | 1646 | cp += sys_mbstowcs ((PWCHAR) cp, NT_MAX_PATH, oldpath) * sizeof (WCHAR); |
1870c688 | 1647 | } |
81adfe28 | 1648 | |
1870c688 CV |
1649 | if (isdevice && win32_newpath.exists ()) |
1650 | { | |
1651 | status = NtOpenFile (&fh, FILE_WRITE_ATTRIBUTES, | |
81adfe28 | 1652 | win32_newpath.get_object_attr (attr, sa), |
1870c688 CV |
1653 | &io, 0, FILE_OPEN_FOR_BACKUP_INTENT); |
1654 | if (!NT_SUCCESS (status)) | |
1655 | { | |
1656 | __seterrno_from_nt_status (status); | |
1657 | goto done; | |
1658 | } | |
669bdeb8 | 1659 | status = NtSetAttributesFile (fh, FILE_ATTRIBUTE_NORMAL); |
1870c688 CV |
1660 | NtClose (fh); |
1661 | if (!NT_SUCCESS (status)) | |
1662 | { | |
1663 | __seterrno_from_nt_status (status); | |
1664 | goto done; | |
1665 | } | |
1666 | } | |
1870c688 CV |
1667 | status = NtCreateFile (&fh, DELETE | FILE_GENERIC_WRITE, |
1668 | win32_newpath.get_object_attr (attr, sa), | |
1669 | &io, NULL, FILE_ATTRIBUTE_NORMAL, | |
1670 | FILE_SHARE_VALID_FLAGS, | |
1671 | isdevice ? FILE_OVERWRITE_IF : FILE_CREATE, | |
1672 | FILE_SYNCHRONOUS_IO_NONALERT | |
1673 | | FILE_NON_DIRECTORY_FILE | |
1674 | | FILE_OPEN_FOR_BACKUP_INTENT, | |
1675 | NULL, 0); | |
1676 | if (!NT_SUCCESS (status)) | |
1677 | { | |
1678 | __seterrno_from_nt_status (status); | |
1679 | goto done; | |
1680 | } | |
b42441d3 | 1681 | if (win32_newpath.has_acls ()) |
88797e59 | 1682 | set_file_attribute (fh, win32_newpath, ILLEGAL_UID, ILLEGAL_GID, |
b42441d3 CV |
1683 | (io.Information == FILE_CREATED ? S_JUSTCREATED : 0) |
1684 | | S_IFLNK | STD_RBITS | STD_WBITS); | |
1870c688 CV |
1685 | status = NtWriteFile (fh, NULL, NULL, NULL, &io, buf, cp - buf, NULL, NULL); |
1686 | if (NT_SUCCESS (status) && io.Information == (ULONG) (cp - buf)) | |
1687 | { | |
0fb0fb83 CV |
1688 | status = NtSetAttributesFile (fh, mk_winsym ? FILE_ATTRIBUTE_READONLY |
1689 | : FILE_ATTRIBUTE_SYSTEM); | |
1870c688 CV |
1690 | if (!NT_SUCCESS (status)) |
1691 | debug_printf ("Setting attributes failed, status = %p", status); | |
1692 | res = 0; | |
1693 | } | |
1694 | else | |
1695 | { | |
1696 | __seterrno_from_nt_status (status); | |
1697 | FILE_DISPOSITION_INFORMATION fdi = { TRUE }; | |
1698 | status = NtSetInformationFile (fh, &io, &fdi, sizeof fdi, | |
1699 | FileDispositionInformation); | |
1700 | if (!NT_SUCCESS (status)) | |
1701 | debug_printf ("Setting delete dispostion failed, status = %p", status); | |
1702 | } | |
1703 | NtClose (fh); | |
1704 | ||
1705 | done: | |
1706 | syscall_printf ("%d = symlink_worker (%s, %s, %d, %d)", res, oldpath, | |
0fb0fb83 | 1707 | newpath, mk_winsym, isdevice); |
4401b147 CV |
1708 | if (has_trailing_dirsep) |
1709 | free ((void *) newpath); | |
1870c688 CV |
1710 | return res; |
1711 | } | |
1712 | ||
1713 | static bool | |
1714 | cmp_shortcut_header (win_shortcut_hdr *file_header) | |
1715 | { | |
1716 | /* A Cygwin or U/Win shortcut only contains a description and a relpath. | |
1717 | Cygwin shortcuts also might contain an ITEMIDLIST. The run type is | |
1718 | always set to SW_NORMAL. */ | |
1719 | return file_header->size == sizeof (win_shortcut_hdr) | |
1720 | && !memcmp (&file_header->magic, &GUID_shortcut, sizeof GUID_shortcut) | |
1721 | && (file_header->flags & ~WSH_FLAG_IDLIST) | |
1722 | == (WSH_FLAG_DESC | WSH_FLAG_RELPATH) | |
1723 | && file_header->run == SW_NORMAL; | |
1724 | } | |
1725 | ||
1726 | int | |
5a0d1edb | 1727 | symlink_info::check_shortcut (HANDLE h) |
1870c688 CV |
1728 | { |
1729 | tmp_pathbuf tp; | |
1730 | win_shortcut_hdr *file_header; | |
1731 | char *buf, *cp; | |
1732 | unsigned short len; | |
1733 | int res = 0; | |
1870c688 | 1734 | NTSTATUS status; |
1870c688 CV |
1735 | IO_STATUS_BLOCK io; |
1736 | FILE_STANDARD_INFORMATION fsi; | |
5a0d1edb | 1737 | LARGE_INTEGER off = { QuadPart:0LL }; |
1870c688 | 1738 | |
1870c688 CV |
1739 | status = NtQueryInformationFile (h, &io, &fsi, sizeof fsi, |
1740 | FileStandardInformation); | |
1741 | if (!NT_SUCCESS (status)) | |
1742 | { | |
1743 | set_error (EIO); | |
5a0d1edb | 1744 | return 0; |
1870c688 CV |
1745 | } |
1746 | if (fsi.EndOfFile.QuadPart <= sizeof (win_shortcut_hdr) | |
1747 | || fsi.EndOfFile.QuadPart > 4 * 65536) | |
5a0d1edb | 1748 | return 0; |
1870c688 CV |
1749 | if (fsi.EndOfFile.LowPart < NT_MAX_PATH * sizeof (WCHAR)) |
1750 | buf = (char *) tp.w_get (); | |
1751 | else | |
1752 | buf = (char *) alloca (fsi.EndOfFile.LowPart + 1); | |
5a0d1edb CV |
1753 | status = NtReadFile (h, NULL, NULL, NULL, &io, buf, fsi.EndOfFile.LowPart, |
1754 | &off, NULL); | |
5a0d1edb | 1755 | if (!NT_SUCCESS (status)) |
1870c688 | 1756 | { |
5a0d1edb CV |
1757 | if (status != STATUS_END_OF_FILE) |
1758 | set_error (EIO); | |
1759 | return 0; | |
1870c688 CV |
1760 | } |
1761 | file_header = (win_shortcut_hdr *) buf; | |
1762 | if (io.Information != fsi.EndOfFile.LowPart | |
1763 | || !cmp_shortcut_header (file_header)) | |
5a0d1edb | 1764 | return 0; |
1870c688 CV |
1765 | cp = buf + sizeof (win_shortcut_hdr); |
1766 | if (file_header->flags & WSH_FLAG_IDLIST) /* Skip ITEMIDLIST */ | |
1767 | cp += *(unsigned short *) cp + 2; | |
1768 | if (!(len = *(unsigned short *) cp)) | |
5a0d1edb | 1769 | return 0; |
1870c688 CV |
1770 | cp += 2; |
1771 | /* Check if this is a device file - these start with the sequence :\\ */ | |
1772 | if (strncmp (cp, ":\\", 2) == 0) | |
1773 | res = strlen (strcpy (contents, cp)); /* Don't mess with device files */ | |
1774 | else | |
1775 | { | |
1776 | /* Has appended full path? If so, use it instead of description. */ | |
1777 | unsigned short relpath_len = *(unsigned short *) (cp + len); | |
1778 | if (cp + len + 2 + relpath_len < buf + fsi.EndOfFile.LowPart) | |
1779 | { | |
1780 | cp += len + 2 + relpath_len; | |
1781 | len = *(unsigned short *) cp; | |
1782 | cp += 2; | |
1783 | } | |
4d9c7280 CV |
1784 | if (*(PWCHAR) cp == 0xfeff) /* BOM */ |
1785 | { | |
1786 | char *tmpbuf = tp.c_get (); | |
1787 | if (sys_wcstombs (tmpbuf, NT_MAX_PATH, (PWCHAR) (cp + 2)) | |
1788 | > SYMLINK_MAX + 1) | |
5a0d1edb | 1789 | return 0; |
4d9c7280 CV |
1790 | res = posixify (tmpbuf); |
1791 | } | |
1792 | else if (len > SYMLINK_MAX) | |
5a0d1edb | 1793 | return 0; |
4d9c7280 CV |
1794 | else |
1795 | { | |
1796 | cp[len] = '\0'; | |
1797 | res = posixify (cp); | |
1798 | } | |
1870c688 CV |
1799 | } |
1800 | if (res) /* It's a symlink. */ | |
5b4c992b | 1801 | pflags |= PATH_SYMLINK | PATH_LNK; |
58402a3f | 1802 | return res; |
1870c688 CV |
1803 | } |
1804 | ||
1805 | int | |
5a0d1edb | 1806 | symlink_info::check_sysfile (HANDLE h) |
1870c688 | 1807 | { |
4d9c7280 | 1808 | tmp_pathbuf tp; |
1870c688 | 1809 | char cookie_buf[sizeof (SYMLINK_COOKIE) - 1]; |
4d9c7280 | 1810 | char *srcbuf = tp.c_get (); |
1870c688 | 1811 | int res = 0; |
1870c688 | 1812 | NTSTATUS status; |
1870c688 | 1813 | IO_STATUS_BLOCK io; |
2671595b | 1814 | bool interix_symlink = false; |
5a0d1edb | 1815 | LARGE_INTEGER off = { QuadPart:0LL }; |
1870c688 | 1816 | |
5a0d1edb CV |
1817 | status = NtReadFile (h, NULL, NULL, NULL, &io, cookie_buf, |
1818 | sizeof (cookie_buf), &off, NULL); | |
1870c688 | 1819 | if (!NT_SUCCESS (status)) |
1870c688 | 1820 | { |
03c991fe | 1821 | debug_printf ("ReadFile1 failed %p", status); |
1870c688 | 1822 | if (status != STATUS_END_OF_FILE) |
81adfe28 | 1823 | set_error (EIO); |
5a0d1edb | 1824 | return 0; |
1870c688 | 1825 | } |
5a0d1edb CV |
1826 | off.QuadPart = io.Information; |
1827 | if (io.Information == sizeof (cookie_buf) | |
1870c688 CV |
1828 | && memcmp (cookie_buf, SYMLINK_COOKIE, sizeof (cookie_buf)) == 0) |
1829 | { | |
1830 | /* It's a symlink. */ | |
5b4c992b | 1831 | pflags |= PATH_SYMLINK; |
2671595b CV |
1832 | } |
1833 | else if (io.Information == sizeof (cookie_buf) | |
1834 | && memcmp (cookie_buf, SOCKET_COOKIE, sizeof (cookie_buf)) == 0) | |
1835 | pflags |= PATH_SOCKET; | |
1836 | else if (io.Information >= sizeof (INTERIX_SYMLINK_COOKIE) | |
1837 | && memcmp (cookie_buf, INTERIX_SYMLINK_COOKIE, | |
1838 | sizeof (INTERIX_SYMLINK_COOKIE) - 1) == 0) | |
1839 | { | |
1840 | /* It's an Interix symlink. */ | |
5b4c992b | 1841 | pflags |= PATH_SYMLINK; |
2671595b CV |
1842 | interix_symlink = true; |
1843 | /* Interix symlink cookies are shorter than Cygwin symlink cookies, so | |
1844 | in case of an Interix symlink cooky we have read too far into the | |
1845 | file. Set file pointer back to the position right after the cookie. */ | |
5a0d1edb | 1846 | off.QuadPart = sizeof (INTERIX_SYMLINK_COOKIE) - 1; |
2671595b | 1847 | } |
5b4c992b | 1848 | if (pflags & PATH_SYMLINK) |
2671595b | 1849 | { |
1870c688 | 1850 | status = NtReadFile (h, NULL, NULL, NULL, &io, srcbuf, |
5a0d1edb | 1851 | NT_MAX_PATH, &off, NULL); |
1870c688 CV |
1852 | if (!NT_SUCCESS (status)) |
1853 | { | |
1854 | debug_printf ("ReadFile2 failed"); | |
1855 | if (status != STATUS_END_OF_FILE) | |
1856 | set_error (EIO); | |
1857 | } | |
2671595b CV |
1858 | else if (*(PWCHAR) srcbuf == 0xfeff /* BOM */ |
1859 | || interix_symlink) | |
4d9c7280 | 1860 | { |
2671595b CV |
1861 | /* Add trailing 0 to Interix symlink target. Skip BOM in Cygwin |
1862 | symlinks. */ | |
1863 | if (interix_symlink) | |
1864 | ((PWCHAR) srcbuf)[io.Information / sizeof (WCHAR)] = L'\0'; | |
1865 | else | |
1866 | srcbuf += 2; | |
4d9c7280 | 1867 | char *tmpbuf = tp.c_get (); |
2671595b | 1868 | if (sys_wcstombs (tmpbuf, NT_MAX_PATH, (PWCHAR) srcbuf) |
4d9c7280 CV |
1869 | > SYMLINK_MAX + 1) |
1870 | debug_printf ("symlink string too long"); | |
1871 | else | |
1872 | res = posixify (tmpbuf); | |
1873 | } | |
1870c688 CV |
1874 | else if (io.Information > SYMLINK_MAX + 1) |
1875 | debug_printf ("symlink string too long"); | |
1876 | else | |
1877 | res = posixify (srcbuf); | |
1878 | } | |
1870c688 CV |
1879 | return res; |
1880 | } | |
1881 | ||
1882 | int | |
1883 | symlink_info::check_reparse_point (HANDLE h) | |
1884 | { | |
1885 | tmp_pathbuf tp; | |
1886 | NTSTATUS status; | |
1887 | IO_STATUS_BLOCK io; | |
1888 | PREPARSE_DATA_BUFFER rp = (PREPARSE_DATA_BUFFER) tp.c_get (); | |
3aec0f00 | 1889 | UNICODE_STRING subst; |
1870c688 CV |
1890 | char srcbuf[SYMLINK_MAX + 7]; |
1891 | ||
1892 | status = NtFsControlFile (h, NULL, NULL, NULL, &io, FSCTL_GET_REPARSE_POINT, | |
1893 | NULL, 0, (LPVOID) rp, | |
1894 | MAXIMUM_REPARSE_DATA_BUFFER_SIZE); | |
1895 | if (!NT_SUCCESS (status)) | |
1896 | { | |
1897 | debug_printf ("NtFsControlFile(FSCTL_GET_REPARSE_POINT) failed, %p", | |
1898 | status); | |
1899 | set_error (EIO); | |
1900 | return 0; | |
1901 | } | |
1902 | if (rp->ReparseTag == IO_REPARSE_TAG_SYMLINK) | |
3aec0f00 CV |
1903 | RtlInitCountedUnicodeString (&subst, |
1904 | (WCHAR *)((char *)rp->SymbolicLinkReparseBuffer.PathBuffer | |
1905 | + rp->SymbolicLinkReparseBuffer.SubstituteNameOffset), | |
1906 | rp->SymbolicLinkReparseBuffer.SubstituteNameLength); | |
1870c688 CV |
1907 | else if (rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT) |
1908 | { | |
11788f8c CV |
1909 | RtlInitCountedUnicodeString (&subst, |
1910 | (WCHAR *)((char *)rp->MountPointReparseBuffer.PathBuffer | |
1911 | + rp->MountPointReparseBuffer.SubstituteNameOffset), | |
1912 | rp->MountPointReparseBuffer.SubstituteNameLength); | |
16a72f7e | 1913 | if (RtlEqualUnicodePathPrefix (&subst, &ro_u_volume, TRUE)) |
1870c688 | 1914 | { |
c177980e CV |
1915 | /* Volume mount point. Not treated as symlink. The return |
1916 | value of -1 is a hint for the caller to treat this as a | |
1917 | volume mount point. */ | |
1918 | return -1; | |
1870c688 | 1919 | } |
1870c688 | 1920 | } |
3aec0f00 CV |
1921 | else |
1922 | { | |
1923 | /* Maybe it's a reparse point, but it's certainly not one we | |
1924 | recognize. Drop the REPARSE file attribute so we don't even | |
1925 | try to use the flag for some special handling. It's just some | |
1926 | arbitrary file or directory for us. */ | |
1927 | fileattr &= ~FILE_ATTRIBUTE_REPARSE_POINT; | |
1928 | return 0; | |
1929 | } | |
1930 | sys_wcstombs (srcbuf, SYMLINK_MAX + 7, subst.Buffer, | |
1931 | subst.Length / sizeof (WCHAR)); | |
5b4c992b | 1932 | pflags |= PATH_SYMLINK | PATH_REP; |
c80480bf | 1933 | /* A symlink is never a directory. */ |
3aec0f00 | 1934 | fileattr &= ~FILE_ATTRIBUTE_DIRECTORY; |
1870c688 CV |
1935 | return posixify (srcbuf); |
1936 | } | |
1937 | ||
1938 | int | |
1939 | symlink_info::check_nfs_symlink (HANDLE h) | |
1940 | { | |
1941 | tmp_pathbuf tp; | |
1942 | NTSTATUS status; | |
1943 | IO_STATUS_BLOCK io; | |
1944 | struct { | |
1945 | FILE_GET_EA_INFORMATION fgei; | |
1946 | char buf[sizeof (NFS_SYML_TARGET)]; | |
1947 | } fgei_buf; | |
1948 | PFILE_FULL_EA_INFORMATION pffei; | |
1949 | int res = 0; | |
1950 | ||
1951 | /* To find out if the file is a symlink and to get the symlink target, | |
1952 | try to fetch the NfsSymlinkTargetName EA. */ | |
1953 | fgei_buf.fgei.NextEntryOffset = 0; | |
1954 | fgei_buf.fgei.EaNameLength = sizeof (NFS_SYML_TARGET) - 1; | |
1955 | stpcpy (fgei_buf.fgei.EaName, NFS_SYML_TARGET); | |
1956 | pffei = (PFILE_FULL_EA_INFORMATION) tp.w_get (); | |
1957 | status = NtQueryEaFile (h, &io, pffei, NT_MAX_PATH * sizeof (WCHAR), TRUE, | |
1958 | &fgei_buf.fgei, sizeof fgei_buf, NULL, TRUE); | |
1959 | if (NT_SUCCESS (status) && pffei->EaValueLength > 0) | |
1960 | { | |
1961 | PWCHAR spath = (PWCHAR) | |
1962 | (pffei->EaName + pffei->EaNameLength + 1); | |
1963 | res = sys_wcstombs (contents, SYMLINK_MAX + 1, | |
5a0d1edb | 1964 | spath, pffei->EaValueLength) - 1; |
5b4c992b | 1965 | pflags |= PATH_SYMLINK; |
1870c688 CV |
1966 | } |
1967 | return res; | |
1968 | } | |
1969 | ||
1970 | int | |
1971 | symlink_info::posixify (char *srcbuf) | |
1972 | { | |
1973 | /* The definition for a path in a native symlink is a bit weird. The Flags | |
1974 | value seem to contain 0 for absolute paths (stored as NT native path) | |
1975 | and 1 for relative paths. Relative paths are paths not starting with a | |
1976 | drive letter. These are not converted to NT native, but stored as | |
1977 | given. A path starting with a single backslash is relative to the | |
1978 | current drive thus a "relative" value (Flags == 1). | |
1979 | Funny enough it's possible to store paths with slashes instead of | |
1980 | backslashes, but they are evaluated incorrectly by subsequent Windows | |
1981 | calls like CreateFile (ERROR_INVALID_NAME). So, what we do here is to | |
1982 | take paths starting with slashes at face value, evaluating them as | |
1983 | Cygwin specific POSIX paths. | |
1984 | A path starting with two slashes(!) or backslashes is converted into an | |
1985 | NT UNC path. Unfortunately, in contrast to POSIX rules, paths starting | |
1986 | with three or more (back)slashes are also converted into UNC paths, | |
1987 | just incorrectly sticking to one redundant leading backslashe. We go | |
1988 | along with this behaviour to avoid scenarios in which native tools access | |
1989 | other files than Cygwin. | |
1990 | The above rules are used exactly the same way on Cygwin specific symlinks | |
1991 | (sysfiles and shortcuts) to eliminate non-POSIX paths in the output. */ | |
1992 | ||
1993 | /* Eliminate native NT prefixes. */ | |
1994 | if (srcbuf[0] == '\\' && !strncmp (srcbuf + 1, "??\\", 3)) | |
1995 | { | |
1996 | srcbuf += 4; | |
1997 | if (srcbuf[1] != ':') /* native UNC path */ | |
1998 | *(srcbuf += 2) = '\\'; | |
1999 | } | |
2000 | if (isdrive (srcbuf)) | |
2001 | mount_table->conv_to_posix_path (srcbuf, contents, 0); | |
2002 | else if (srcbuf[0] == '\\') | |
2003 | { | |
2004 | if (srcbuf[1] == '\\') /* UNC path */ | |
2005 | slashify (srcbuf, contents, 0); | |
2006 | else /* Paths starting with \ are current drive relative. */ | |
2007 | { | |
2008 | char cvtbuf[SYMLINK_MAX + 1]; | |
2009 | ||
2010 | stpcpy (cvtbuf + cygheap->cwd.get_drive (cvtbuf), srcbuf); | |
2011 | mount_table->conv_to_posix_path (cvtbuf, contents, 0); | |
2012 | } | |
2013 | } | |
2014 | else /* Everything else is taken as is. */ | |
2015 | slashify (srcbuf, contents, 0); | |
2016 | return strlen (contents); | |
2017 | } | |
2018 | ||
2019 | enum | |
2020 | { | |
2021 | SCAN_BEG, | |
2022 | SCAN_LNK, | |
2023 | SCAN_HASLNK, | |
2024 | SCAN_JUSTCHECK, | |
2025 | SCAN_JUSTCHECKTHIS, /* Never try to append a suffix. */ | |
2026 | SCAN_APPENDLNK, | |
2027 | SCAN_EXTRALNK, | |
2028 | SCAN_DONE, | |
2029 | }; | |
2030 | ||
2031 | class suffix_scan | |
2032 | { | |
2033 | const suffix_info *suffixes, *suffixes_start; | |
2034 | int nextstate; | |
2035 | char *eopath; | |
2036 | public: | |
2037 | const char *path; | |
2038 | char *has (const char *, const suffix_info *); | |
2039 | int next (); | |
2040 | int lnk_match () {return nextstate >= SCAN_APPENDLNK;} | |
2041 | }; | |
2042 | ||
2043 | char * | |
2044 | suffix_scan::has (const char *in_path, const suffix_info *in_suffixes) | |
2045 | { | |
2046 | nextstate = SCAN_BEG; | |
2047 | suffixes = suffixes_start = in_suffixes; | |
2048 | ||
2049 | const char *fname = strrchr (in_path, '\\'); | |
2050 | fname = fname ? fname + 1 : in_path; | |
2051 | char *ext_here = strrchr (fname, '.'); | |
2052 | path = in_path; | |
2053 | eopath = strchr (path, '\0'); | |
2054 | ||
2055 | if (!ext_here) | |
2056 | goto noext; | |
2057 | ||
2058 | if (suffixes) | |
2059 | { | |
2060 | /* Check if the extension matches a known extension */ | |
2061 | for (const suffix_info *ex = in_suffixes; ex->name != NULL; ex++) | |
2062 | if (ascii_strcasematch (ext_here, ex->name)) | |
81adfe28 | 2063 | { |
1870c688 CV |
2064 | nextstate = SCAN_JUSTCHECK; |
2065 | suffixes = NULL; /* Has an extension so don't scan for one. */ | |
2066 | goto done; | |
81adfe28 | 2067 | } |
1870c688 | 2068 | } |
81adfe28 | 2069 | |
1870c688 CV |
2070 | /* Didn't match. Use last resort -- .lnk. */ |
2071 | if (ascii_strcasematch (ext_here, ".lnk")) | |
2072 | { | |
2073 | nextstate = SCAN_HASLNK; | |
2074 | suffixes = NULL; | |
2075 | } | |
81adfe28 | 2076 | |
1870c688 CV |
2077 | noext: |
2078 | ext_here = eopath; | |
81adfe28 | 2079 | |
1870c688 CV |
2080 | done: |
2081 | /* Avoid attaching suffixes if the resulting filename would be invalid. */ | |
2082 | if (eopath - fname > NAME_MAX - 4) | |
2083 | { | |
2084 | nextstate = SCAN_JUSTCHECKTHIS; | |
2085 | suffixes = NULL; | |
2086 | } | |
2087 | return ext_here; | |
2088 | } | |
81adfe28 | 2089 | |
1870c688 CV |
2090 | int |
2091 | suffix_scan::next () | |
2092 | { | |
2093 | for (;;) | |
2094 | { | |
2095 | if (!suffixes) | |
2096 | switch (nextstate) | |
81adfe28 | 2097 | { |
1870c688 CV |
2098 | case SCAN_BEG: |
2099 | suffixes = suffixes_start; | |
2100 | if (!suffixes) | |
2101 | { | |
2102 | nextstate = SCAN_LNK; | |
2103 | return 1; | |
2104 | } | |
2105 | nextstate = SCAN_EXTRALNK; | |
2106 | /* fall through to suffix checking below */ | |
2107 | break; | |
2108 | case SCAN_HASLNK: | |
2109 | nextstate = SCAN_APPENDLNK; /* Skip SCAN_BEG */ | |
2110 | return 1; | |
2111 | case SCAN_EXTRALNK: | |
2112 | nextstate = SCAN_DONE; | |
2113 | *eopath = '\0'; | |
2114 | return 0; | |
2115 | case SCAN_JUSTCHECK: | |
2116 | nextstate = SCAN_LNK; | |
2117 | return 1; | |
2118 | case SCAN_JUSTCHECKTHIS: | |
2119 | nextstate = SCAN_DONE; | |
2120 | return 1; | |
2121 | case SCAN_LNK: | |
2122 | case SCAN_APPENDLNK: | |
2123 | strcat (eopath, ".lnk"); | |
2124 | nextstate = SCAN_DONE; | |
2125 | return 1; | |
2126 | default: | |
2127 | *eopath = '\0'; | |
81adfe28 CF |
2128 | return 0; |
2129 | } | |
81adfe28 | 2130 | |
1870c688 CV |
2131 | while (suffixes && suffixes->name) |
2132 | if (nextstate == SCAN_EXTRALNK && !suffixes->addon) | |
2133 | suffixes++; | |
2134 | else | |
81adfe28 | 2135 | { |
1870c688 CV |
2136 | strcpy (eopath, suffixes->name); |
2137 | if (nextstate == SCAN_EXTRALNK) | |
2138 | strcat (eopath, ".lnk"); | |
2139 | suffixes++; | |
2140 | return 1; | |
81adfe28 | 2141 | } |
1870c688 CV |
2142 | suffixes = NULL; |
2143 | } | |
2144 | } | |
81adfe28 | 2145 | |
1870c688 CV |
2146 | bool |
2147 | symlink_info::set_error (int in_errno) | |
2148 | { | |
2149 | bool res; | |
2150 | if (!(pflags & PATH_NO_ACCESS_CHECK) || in_errno == ENAMETOOLONG || in_errno == EIO) | |
2151 | { | |
2152 | error = in_errno; | |
2153 | res = true; | |
2154 | } | |
2155 | else if (in_errno == ENOENT) | |
2156 | res = true; | |
2157 | else | |
2158 | { | |
2159 | fileattr = FILE_ATTRIBUTE_NORMAL; | |
2160 | res = false; | |
2161 | } | |
2162 | return res; | |
2163 | } | |
2164 | ||
2165 | bool | |
2166 | symlink_info::parse_device (const char *contents) | |
2167 | { | |
2168 | char *endptr; | |
2169 | _major_t mymajor; | |
2170 | _major_t myminor; | |
2171 | _mode_t mymode; | |
2172 | ||
2173 | mymajor = strtol (contents += 2, &endptr, 16); | |
2174 | if (endptr == contents) | |
2175 | return isdevice = false; | |
2176 | ||
2177 | contents = endptr; | |
2178 | myminor = strtol (++contents, &endptr, 16); | |
2179 | if (endptr == contents) | |
2180 | return isdevice = false; | |
2181 | ||
2182 | contents = endptr; | |
2183 | mymode = strtol (++contents, &endptr, 16); | |
2184 | if (endptr == contents) | |
2185 | return isdevice = false; | |
2186 | ||
2187 | if ((mymode & S_IFMT) == S_IFIFO) | |
2188 | { | |
2189 | mymajor = _major (FH_FIFO); | |
2190 | myminor = _minor (FH_FIFO); | |
2191 | } | |
81adfe28 | 2192 | |
1870c688 CV |
2193 | major = mymajor; |
2194 | minor = myminor; | |
2195 | mode = mymode; | |
2196 | return isdevice = true; | |
2197 | } | |
2198 | ||
2199 | /* Check if PATH is a symlink. PATH must be a valid Win32 path name. | |
2200 | ||
2201 | If PATH is a symlink, put the value of the symlink--the file to | |
2202 | which it points--into BUF. The value stored in BUF is not | |
2203 | necessarily null terminated. BUFLEN is the length of BUF; only up | |
2204 | to BUFLEN characters will be stored in BUF. BUF may be NULL, in | |
2205 | which case nothing will be stored. | |
2206 | ||
2207 | Set *SYML if PATH is a symlink. | |
2208 | ||
2209 | Set *EXEC if PATH appears to be executable. This is an efficiency | |
2210 | hack because we sometimes have to open the file anyhow. *EXEC will | |
2211 | not be set for every executable file. | |
2212 | ||
2213 | Return -1 on error, 0 if PATH is not a symlink, or the length | |
2214 | stored into BUF if PATH is a symlink. */ | |
2215 | ||
2216 | int | |
5a0d1edb CV |
2217 | symlink_info::check (char *path, const suffix_info *suffixes, fs_info &fs, |
2218 | path_conv_handle &conv_hdl) | |
1870c688 | 2219 | { |
6ff06a07 CV |
2220 | int res; |
2221 | HANDLE h; | |
2222 | NTSTATUS status; | |
2223 | UNICODE_STRING upath; | |
2224 | OBJECT_ATTRIBUTES attr; | |
2225 | IO_STATUS_BLOCK io; | |
1870c688 | 2226 | suffix_scan suffix; |
1870c688 | 2227 | |
8802178f CV |
2228 | const ULONG ci_flag = cygwin_shared->obcaseinsensitive |
2229 | || (pflags & PATH_NOPOSIX) ? OBJ_CASE_INSENSITIVE : 0; | |
1870c688 CV |
2230 | /* TODO: Temporarily do all char->UNICODE conversion here. This should |
2231 | already be slightly faster than using Ascii functions. */ | |
2232 | tmp_pathbuf tp; | |
1870c688 | 2233 | tp.u_get (&upath); |
e4b57503 | 2234 | InitializeObjectAttributes (&attr, &upath, ci_flag, NULL, NULL); |
1870c688 | 2235 | |
6ff06a07 CV |
2236 | /* This label is used in case we encounter a FS which only handles |
2237 | DOS paths. See below. */ | |
b12d6d10 | 2238 | bool restarted = false; |
6ff06a07 CV |
2239 | restart: |
2240 | ||
2241 | h = NULL; | |
2242 | res = 0; | |
2243 | contents[0] = '\0'; | |
2244 | issymlink = true; | |
2245 | isdevice = false; | |
2246 | major = 0; | |
2247 | minor = 0; | |
2248 | mode = 0; | |
2249 | pflags &= ~(PATH_SYMLINK | PATH_LNK | PATH_REP); | |
2250 | ||
2251 | ext_here = suffix.has (path, suffixes); | |
2252 | extn = ext_here - path; | |
2253 | ||
6afd6301 | 2254 | PVOID eabuf = &nfs_aol_ffei; |
1870c688 CV |
2255 | ULONG easize = sizeof nfs_aol_ffei; |
2256 | ||
b3cbb06c | 2257 | bool had_ext = !!*ext_here; |
1870c688 CV |
2258 | while (suffix.next ()) |
2259 | { | |
6afd6301 | 2260 | bool no_ea = false; |
81adfe28 | 2261 | |
1870c688 | 2262 | error = 0; |
5b4c992b | 2263 | get_nt_native_path (suffix.path, upath, pflags & PATH_DOS); |
1870c688 CV |
2264 | if (h) |
2265 | { | |
2266 | NtClose (h); | |
2267 | h = NULL; | |
2268 | } | |
2269 | /* The EA given to NtCreateFile allows to get a handle to a symlink on | |
2270 | an NFS share, rather than getting a handle to the target of the | |
2271 | symlink (which would spoil the task of this method quite a bit). | |
2272 | Fortunately it's ignored on most other file systems so we don't have | |
2273 | to special case NFS too much. */ | |
dd0821e3 CV |
2274 | status = NtCreateFile (&h, |
2275 | READ_CONTROL | FILE_READ_ATTRIBUTES | FILE_READ_EA, | |
2276 | &attr, &io, NULL, 0, FILE_SHARE_VALID_FLAGS, | |
2277 | FILE_OPEN, | |
1870c688 CV |
2278 | FILE_OPEN_REPARSE_POINT |
2279 | | FILE_OPEN_FOR_BACKUP_INTENT, | |
2280 | eabuf, easize); | |
dd0821e3 | 2281 | debug_printf ("%p = NtCreateFile (%S)", status, &upath); |
1870c688 | 2282 | /* No right to access EAs or EAs not supported? */ |
3432d6f1 CV |
2283 | if (!NT_SUCCESS (status) |
2284 | && (status == STATUS_ACCESS_DENIED | |
2285 | || status == STATUS_EAS_NOT_SUPPORTED | |
2286 | || status == STATUS_NOT_SUPPORTED | |
2287 | || status == STATUS_INVALID_NETWORK_RESPONSE | |
2288 | /* Or a bug in Samba 3.2.x (x <= 7) when accessing a share's | |
2289 | root dir which has EAs enabled? */ | |
2290 | || status == STATUS_INVALID_PARAMETER)) | |
1870c688 | 2291 | { |
6afd6301 | 2292 | no_ea = true; |
1870c688 | 2293 | /* If EAs are not supported, there's no sense to check them again |
ffea27fc | 2294 | with suffixes attached. So we set eabuf/easize to 0 here once. */ |
c45871c9 CV |
2295 | if (status == STATUS_EAS_NOT_SUPPORTED |
2296 | || status == STATUS_NOT_SUPPORTED) | |
7a70dda0 | 2297 | { |
1870c688 CV |
2298 | eabuf = NULL; |
2299 | easize = 0; | |
a888c079 | 2300 | } |
dd0821e3 CV |
2301 | status = NtOpenFile (&h, READ_CONTROL | FILE_READ_ATTRIBUTES, |
2302 | &attr, &io, FILE_SHARE_VALID_FLAGS, | |
2b41d940 CV |
2303 | FILE_OPEN_REPARSE_POINT |
2304 | | FILE_OPEN_FOR_BACKUP_INTENT); | |
dd0821e3 | 2305 | debug_printf ("%p = NtOpenFile (no-EAs %S)", status, &upath); |
1870c688 | 2306 | } |
6ff06a07 CV |
2307 | if (status == STATUS_OBJECT_NAME_NOT_FOUND) |
2308 | { | |
8802178f | 2309 | if (ci_flag == 0 && wincap.has_broken_udf () |
002a34fa | 2310 | && (!fs.inited () || fs.is_udf ())) |
43616e55 | 2311 | { |
6ff06a07 CV |
2312 | /* On NT 5.x UDF is broken (at least) in terms of case |
2313 | sensitivity. When trying to open a file case sensitive, | |
2314 | the file appears to be non-existant. Another bug is | |
2315 | described in fs_info::update. */ | |
2316 | attr.Attributes = OBJ_CASE_INSENSITIVE; | |
2317 | status = NtOpenFile (&h, READ_CONTROL | FILE_READ_ATTRIBUTES, | |
2318 | &attr, &io, FILE_SHARE_VALID_FLAGS, | |
2319 | FILE_OPEN_REPARSE_POINT | |
2320 | | FILE_OPEN_FOR_BACKUP_INTENT); | |
2321 | debug_printf ("%p = NtOpenFile (broken-UDF, %S)", status, &upath); | |
2322 | attr.Attributes = 0; | |
2323 | if (NT_SUCCESS (status)) | |
2324 | { | |
002a34fa CV |
2325 | if (!fs.inited ()) |
2326 | fs.update (&upath, h); | |
8802178f | 2327 | if (!fs.is_udf ()) |
6ff06a07 CV |
2328 | { |
2329 | NtClose (h); | |
b7d3e6d7 | 2330 | h = NULL; |
6ff06a07 CV |
2331 | status = STATUS_OBJECT_NAME_NOT_FOUND; |
2332 | } | |
2333 | } | |
2334 | } | |
2335 | /* There are filesystems out in the wild (Netapp, NWFS, and others) | |
2336 | which are uncapable of generating pathnames outside the Win32 | |
2337 | rules. That means, filenames on these FSes must not have a | |
2338 | leading space or trailing dots and spaces. This code snippet | |
2339 | manages them. I really hope it's streamlined enough not to | |
2340 | slow down normal operation. This extra check only kicks in if | |
2341 | we encountered a STATUS_OBJECT_NAME_NOT_FOUND *and* we didn't | |
2342 | already attach a suffix *and* the above special case for UDF | |
2343 | on XP didn't succeeed. */ | |
5b4c992b | 2344 | if (!restarted && !*ext_here && !(pflags & PATH_DOS) && !fs.inited ()) |
6ff06a07 | 2345 | { |
002a34fa | 2346 | /* Check for trailing dot or space or leading space in |
6ff06a07 | 2347 | last component. */ |
002a34fa CV |
2348 | char *p = ext_here - 1; |
2349 | if (*p != '.' && *p != ' ') | |
2350 | { | |
2351 | while (*--p != '\\') | |
2352 | ; | |
2353 | if (*++p != ' ') | |
2354 | p = NULL; | |
2355 | } | |
2356 | if (p) | |
6ff06a07 | 2357 | { |
002a34fa CV |
2358 | /* If so, check if file resides on one of the known broken |
2359 | FSes only supporting filenames following DOS rules. */ | |
2360 | if (!fs.inited ()) | |
2361 | fs.update (&upath, NULL); | |
8802178f CV |
2362 | if (fs.has_dos_filenames_only ()) |
2363 | { | |
002a34fa CV |
2364 | /* If so, try again. Since we now know the FS, the |
2365 | filenames will be tweaked to follow DOS rules via the | |
2366 | third parameter in the call to get_nt_native_path. */ | |
5b4c992b | 2367 | pflags |= PATH_DOS; |
8802178f CV |
2368 | restarted = true; |
2369 | goto restart; | |
2370 | } | |
43616e55 CV |
2371 | } |
2372 | } | |
2373 | } | |
c04ed45d | 2374 | |
1870c688 | 2375 | if (NT_SUCCESS (status) |
3432d6f1 CV |
2376 | /* Check file system while we're having the file open anyway. |
2377 | This speeds up path_conv noticably (~10%). */ | |
c80480bf CV |
2378 | && (fs.inited () || fs.update (&upath, h))) |
2379 | { | |
2380 | if (fs.is_nfs ()) | |
2381 | { | |
1da77c26 | 2382 | status = nfs_fetch_fattr3 (h, conv_hdl.nfsattr ()); |
c80480bf | 2383 | if (NT_SUCCESS (status)) |
1da77c26 CV |
2384 | fileattr = ((conv_hdl.nfsattr ()->type & 7) == NF3DIR) |
2385 | ? FILE_ATTRIBUTE_DIRECTORY : 0; | |
c80480bf CV |
2386 | } |
2387 | else | |
2388 | { | |
2d355410 CV |
2389 | PFILE_NETWORK_OPEN_INFORMATION pfnoi = conv_hdl.fnoi (); |
2390 | ||
c80480bf CV |
2391 | status = NtQueryInformationFile (h, &io, pfnoi, sizeof *pfnoi, |
2392 | FileNetworkOpenInformation); | |
3498f76d CV |
2393 | if ((status == STATUS_INVALID_PARAMETER |
2394 | || status == STATUS_NOT_IMPLEMENTED) | |
2395 | && RtlEqualUnicodePathPrefix (&upath, &ro_u_uncp, FALSE)) | |
2396 | { | |
2397 | /* This occurs when accessing SMB share root dirs hosted on | |
2398 | NT4 (STATUS_INVALID_PARAMETER), or when trying to access | |
2399 | SMB share root dirs from NT4 (STATUS_NOT_IMPLEMENTED). */ | |
2d355410 CV |
2400 | FILE_BASIC_INFORMATION fbi; |
2401 | ||
3498f76d CV |
2402 | status = NtQueryInformationFile (h, &io, &fbi, sizeof fbi, |
2403 | FileBasicInformation); | |
2404 | if (NT_SUCCESS (status)) | |
2405 | { | |
2406 | memcpy (pfnoi, &fbi, 4 * sizeof (LARGE_INTEGER)); | |
2407 | pfnoi->EndOfFile.QuadPart | |
2408 | = pfnoi->AllocationSize.QuadPart = 0; | |
2409 | pfnoi->FileAttributes = fbi.FileAttributes; | |
2410 | } | |
2411 | } | |
c80480bf CV |
2412 | if (NT_SUCCESS (status)) |
2413 | fileattr = pfnoi->FileAttributes; | |
2414 | } | |
2415 | } | |
2416 | if (!NT_SUCCESS (status)) | |
1870c688 CV |
2417 | { |
2418 | debug_printf ("%p = NtQueryInformationFile (%S)", status, &upath); | |
1870c688 CV |
2419 | fileattr = INVALID_FILE_ATTRIBUTES; |
2420 | ||
2421 | /* One of the inner path components is invalid, or the path contains | |
2422 | invalid characters. Bail out with ENOENT. | |
2423 | ||
2424 | Note that additional STATUS_OBJECT_PATH_INVALID and | |
2425 | STATUS_OBJECT_PATH_SYNTAX_BAD status codes exist. The first one | |
4ee93264 | 2426 | is seemingly not generated by NtQueryInformationFile, the latter |
1870c688 CV |
2427 | is only generated if the path is no absolute path within the |
2428 | NT name space, which should not happen and would point to an | |
2429 | error in get_nt_native_path. Both status codes are deliberately | |
2430 | not tested here unless proved necessary. */ | |
2431 | if (status == STATUS_OBJECT_PATH_NOT_FOUND | |
590f450a | 2432 | || status == STATUS_OBJECT_NAME_INVALID |
fad9568b CV |
2433 | || status == STATUS_BAD_NETWORK_PATH |
2434 | || status == STATUS_BAD_NETWORK_NAME | |
590f450a | 2435 | || status == STATUS_NO_MEDIA_IN_DEVICE) |
a888c079 | 2436 | { |
1870c688 CV |
2437 | set_error (ENOENT); |
2438 | goto file_not_symlink; | |
7a70dda0 | 2439 | } |
1870c688 CV |
2440 | if (status != STATUS_OBJECT_NAME_NOT_FOUND |
2441 | && status != STATUS_NO_SUCH_FILE) /* ENOENT on NFS or 9x share */ | |
81adfe28 | 2442 | { |
1870c688 CV |
2443 | /* The file exists, but the user can't access it for one reason |
2444 | or the other. To get the file attributes we try to access the | |
2445 | information by opening the parent directory and getting the | |
2446 | file attributes using a matching NtQueryDirectoryFile call. */ | |
2447 | UNICODE_STRING dirname, basename; | |
2448 | OBJECT_ATTRIBUTES dattr; | |
2449 | HANDLE dir; | |
2450 | struct { | |
3432d6f1 | 2451 | FILE_BOTH_DIRECTORY_INFORMATION fdi; |
1870c688 CV |
2452 | WCHAR dummy_buf[NAME_MAX + 1]; |
2453 | } fdi_buf; | |
2454 | ||
2455 | RtlSplitUnicodePath (&upath, &dirname, &basename); | |
e4b57503 CV |
2456 | InitializeObjectAttributes (&dattr, &dirname, ci_flag, |
2457 | NULL, NULL); | |
1870c688 CV |
2458 | status = NtOpenFile (&dir, SYNCHRONIZE | FILE_LIST_DIRECTORY, |
2459 | &dattr, &io, FILE_SHARE_VALID_FLAGS, | |
2460 | FILE_SYNCHRONOUS_IO_NONALERT | |
2461 | | FILE_OPEN_FOR_BACKUP_INTENT | |
2462 | | FILE_DIRECTORY_FILE); | |
2463 | if (!NT_SUCCESS (status)) | |
2464 | { | |
2465 | debug_printf ("%p = NtOpenFile(%S)", status, &dirname); | |
14c622c6 CV |
2466 | /* There's a special case if the file is itself the root |
2467 | of a drive which is not accessible by the current user. | |
2468 | This case is only recognized by the length of the | |
2469 | basename part. If it's 0, the incoming file is the | |
2470 | root of a drive. So we at least know it's a directory. */ | |
2471 | fileattr = basename.Length ? 0 : FILE_ATTRIBUTE_DIRECTORY; | |
1870c688 CV |
2472 | } |
2473 | else | |
2474 | { | |
dc7dfa3a | 2475 | status = NtQueryDirectoryFile (dir, NULL, NULL, NULL, &io, |
1870c688 | 2476 | &fdi_buf, sizeof fdi_buf, |
3432d6f1 | 2477 | FileBothDirectoryInformation, |
1870c688 | 2478 | TRUE, &basename, TRUE); |
752c477b CV |
2479 | /* Take the opportunity to check file system while we're |
2480 | having the handle to the parent dir. */ | |
b7d3e6d7 | 2481 | fs.update (&upath, dir); |
1870c688 CV |
2482 | NtClose (dir); |
2483 | if (!NT_SUCCESS (status)) | |
2484 | { | |
2485 | debug_printf ("%p = NtQueryDirectoryFile(%S)", | |
2486 | status, &dirname); | |
3462d736 CV |
2487 | if (status == STATUS_NO_SUCH_FILE) |
2488 | { | |
2489 | /* This can happen when trying to access files | |
2490 | which match DOS device names on SMB shares. | |
2491 | NtOpenFile failed with STATUS_ACCESS_DENIED, | |
2492 | but the NtQueryDirectoryFile tells us the | |
2493 | file doesn't exist. We're suspicious in this | |
2494 | case and retry with the next suffix instead of | |
2495 | just giving up. */ | |
2496 | set_error (ENOENT); | |
2497 | continue; | |
2498 | } | |
1870c688 CV |
2499 | fileattr = 0; |
2500 | } | |
2501 | else | |
c80480bf | 2502 | { |
2d355410 CV |
2503 | PFILE_NETWORK_OPEN_INFORMATION pfnoi = conv_hdl.fnoi (); |
2504 | ||
c80480bf CV |
2505 | fileattr = fdi_buf.fdi.FileAttributes; |
2506 | memcpy (pfnoi, &fdi_buf.fdi.CreationTime, sizeof *pfnoi); | |
1df35772 CV |
2507 | /* Amazing, but true: The FILE_NETWORK_OPEN_INFORMATION |
2508 | structure has the AllocationSize and EndOfFile members | |
2509 | interchanged relative to the directory information | |
2510 | classes. */ | |
2511 | pfnoi->AllocationSize.QuadPart | |
2512 | = fdi_buf.fdi.AllocationSize.QuadPart; | |
2513 | pfnoi->EndOfFile.QuadPart | |
2514 | = fdi_buf.fdi.EndOfFile.QuadPart; | |
c80480bf | 2515 | } |
1870c688 CV |
2516 | } |
2517 | ext_tacked_on = !!*ext_here; | |
81adfe28 | 2518 | goto file_not_symlink; |
1870c688 CV |
2519 | } |
2520 | set_error (ENOENT); | |
2521 | continue; | |
2522 | } | |
81adfe28 | 2523 | |
1870c688 | 2524 | ext_tacked_on = !!*ext_here; |
b3cbb06c CV |
2525 | /* Don't allow to returns directories with appended suffix. If we found |
2526 | a directory with a suffix which has been appended here, then this | |
2527 | directory doesn't match the request. So, just do as usual if file | |
2528 | hasn't been found. */ | |
2529 | if (ext_tacked_on && !had_ext && (fileattr & FILE_ATTRIBUTE_DIRECTORY)) | |
2530 | { | |
2531 | set_error (ENOENT); | |
2532 | continue; | |
2533 | } | |
81adfe28 | 2534 | |
81adfe28 CF |
2535 | res = -1; |
2536 | ||
dd0821e3 CV |
2537 | /* Reparse points are potentially symlinks. This check must be |
2538 | performed before checking the SYSTEM attribute for sysfile | |
2539 | symlinks, since reparse points can have this flag set, too. | |
2540 | For instance, Vista starts to create a couple of reparse points | |
2541 | with SYSTEM and HIDDEN flags set. */ | |
2542 | if ((fileattr & FILE_ATTRIBUTE_REPARSE_POINT)) | |
2543 | { | |
2544 | /* Don't check reparse points on remote filesystems. A reparse point | |
2545 | pointing to another file on the remote system will be mistreated | |
2546 | as pointing to a local file on the local system. This breaks the | |
2547 | way reparse points are transparently handled on remote systems. */ | |
2548 | if (fs.is_remote_drive()) | |
2549 | res = 0; | |
2550 | else | |
2551 | res = check_reparse_point (h); | |
2552 | if (res == -1) | |
2553 | { | |
2554 | /* Volume mount point. The filesystem information for the top | |
2555 | level directory should be for the volume top level directory, | |
2556 | rather than for the reparse point itself. So we fetch the | |
2557 | filesystem information again, but with a NULL handle. | |
2558 | This does what we want because fs_info::update opens the | |
2559 | handle without FILE_OPEN_REPARSE_POINT. */ | |
2560 | fs.update (&upath, NULL); | |
2561 | /* Make sure the open handle is not used in later stat calls. | |
2562 | The handle has been opened with the FILE_OPEN_REPARSE_POINT | |
2563 | flag, so it's a handle to the reparse point, not a handle | |
2564 | to the volumes root dir. */ | |
2565 | pflags &= ~PC_KEEP_HANDLE; | |
2566 | } | |
2567 | else if (res) | |
2568 | { | |
2569 | /* A symlink is never a directory. */ | |
2570 | conv_hdl.fnoi ()->FileAttributes &= ~FILE_ATTRIBUTE_DIRECTORY; | |
2571 | break; | |
2572 | } | |
2573 | } | |
2574 | ||
1870c688 CV |
2575 | /* Windows shortcuts are potentially treated as symlinks. Valid Cygwin |
2576 | & U/WIN shortcuts are R/O, but definitely not directories. */ | |
dd0821e3 | 2577 | else if ((fileattr & (FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY)) |
1870c688 CV |
2578 | == FILE_ATTRIBUTE_READONLY && suffix.lnk_match ()) |
2579 | { | |
dd0821e3 CV |
2580 | HANDLE sym_h; |
2581 | ||
2582 | status = NtOpenFile (&sym_h, SYNCHRONIZE | GENERIC_READ, &attr, &io, | |
2583 | FILE_SHARE_VALID_FLAGS, | |
2584 | FILE_OPEN_FOR_BACKUP_INTENT | |
2585 | | FILE_SYNCHRONOUS_IO_NONALERT); | |
2586 | if (!NT_SUCCESS (status)) | |
5a0d1edb CV |
2587 | res = 0; |
2588 | else | |
dd0821e3 CV |
2589 | { |
2590 | res = check_shortcut (sym_h); | |
2591 | NtClose (sym_h); | |
2592 | } | |
1870c688 CV |
2593 | if (!res) |
2594 | { | |
dd0821e3 CV |
2595 | /* If searching for `foo' and then finding a `foo.lnk' which |
2596 | is no shortcut, return the same as if file not found. */ | |
dc7dfa3a CV |
2597 | if (ext_tacked_on) |
2598 | { | |
2599 | fileattr = INVALID_FILE_ATTRIBUTES; | |
2600 | set_error (ENOENT); | |
2601 | continue; | |
2602 | } | |
1870c688 | 2603 | } |
dc7dfa3a CV |
2604 | else if (contents[0] != ':' || contents[1] != '\\' |
2605 | || !parse_device (contents)) | |
2606 | break; | |
2607 | } | |
2608 | ||
2609 | /* If searching for `foo' and then finding a `foo.lnk' which is | |
2610 | no shortcut, return the same as if file not found. */ | |
2611 | else if (suffix.lnk_match () && ext_tacked_on) | |
2612 | { | |
2613 | fileattr = INVALID_FILE_ATTRIBUTES; | |
2614 | set_error (ENOENT); | |
2615 | continue; | |
1870c688 | 2616 | } |
fe6934da | 2617 | |
1870c688 CV |
2618 | /* This is the old Cygwin method creating symlinks. A symlink will |
2619 | have the `system' file attribute. Only files can be symlinks | |
2620 | (which can be symlinks to directories). */ | |
2621 | else if ((fileattr & (FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_DIRECTORY)) | |
2622 | == FILE_ATTRIBUTE_SYSTEM) | |
2623 | { | |
dd0821e3 CV |
2624 | HANDLE sym_h; |
2625 | ||
2626 | status = NtOpenFile (&sym_h, SYNCHRONIZE | GENERIC_READ, &attr, &io, | |
2627 | FILE_SHARE_VALID_FLAGS, | |
2628 | FILE_OPEN_FOR_BACKUP_INTENT | |
2629 | | FILE_SYNCHRONOUS_IO_NONALERT); | |
2630 | ||
2631 | if (!NT_SUCCESS (status)) | |
5a0d1edb CV |
2632 | res = 0; |
2633 | else | |
dd0821e3 CV |
2634 | { |
2635 | res = check_sysfile (sym_h); | |
2636 | NtClose (sym_h); | |
2637 | } | |
dc7dfa3a CV |
2638 | if (res) |
2639 | break; | |
1870c688 | 2640 | } |
fe6934da | 2641 | |
5a0d1edb CV |
2642 | /* If the file is on an NFS share and could be opened with extended |
2643 | attributes, check if it's a symlink. Only files can be symlinks | |
1870c688 | 2644 | (which can be symlinks to directories). */ |
2d355410 | 2645 | else if (fs.is_nfs () && (conv_hdl.nfsattr ()->type & 7) == NF3LNK) |
1870c688 | 2646 | { |
ab3cd888 | 2647 | res = check_nfs_symlink (h); |
dc7dfa3a CV |
2648 | if (res) |
2649 | break; | |
1870c688 | 2650 | } |
1fd5e000 | 2651 | |
dc7dfa3a | 2652 | /* Normal file. */ |
1870c688 CV |
2653 | file_not_symlink: |
2654 | issymlink = false; | |
2655 | syscall_printf ("%s", isdevice ? "is a device" : "not a symlink"); | |
2656 | res = 0; | |
2657 | break; | |
2658 | } | |
70c370d6 | 2659 | |
1870c688 | 2660 | if (h) |
5a0d1edb CV |
2661 | { |
2662 | if (pflags & PC_KEEP_HANDLE) | |
dd0821e3 | 2663 | conv_hdl.set (h); |
5a0d1edb CV |
2664 | else |
2665 | NtClose (h); | |
2666 | } | |
0f565126 | 2667 | |
1870c688 CV |
2668 | syscall_printf ("%d = symlink.check (%s, %p) (%p)", |
2669 | res, suffix.path, contents, pflags); | |
2670 | return res; | |
2671 | } | |
2672 | ||
2673 | /* "path" is the path in a virtual symlink. Set a symlink_info struct from | |
2674 | that and proceed with further path checking afterwards. */ | |
2675 | int | |
2676 | symlink_info::set (char *path) | |
2677 | { | |
2678 | strcpy (contents, path); | |
2679 | pflags = PATH_SYMLINK; | |
2680 | fileattr = FILE_ATTRIBUTE_NORMAL; | |
2681 | error = 0; | |
2682 | issymlink = true; | |
2683 | isdevice = false; | |
e4b57503 | 2684 | ext_tacked_on = false; |
1870c688 CV |
2685 | ext_here = NULL; |
2686 | extn = major = minor = mode = 0; | |
2687 | return strlen (path); | |
2688 | } | |
2689 | ||
1870c688 | 2690 | /* readlink system call */ |
2cf9359a | 2691 | |
1870c688 CV |
2692 | extern "C" ssize_t |
2693 | readlink (const char *path, char *buf, size_t buflen) | |
2694 | { | |
2695 | if (buflen < 0) | |
2696 | { | |
2697 | set_errno (ENAMETOOLONG); | |
2698 | return -1; | |
2699 | } | |
1fd5e000 | 2700 | |
1870c688 | 2701 | path_conv pathbuf (path, PC_SYM_CONTENTS, stat_suffixes); |
772e2322 | 2702 | |
1870c688 CV |
2703 | if (pathbuf.error) |
2704 | { | |
2705 | set_errno (pathbuf.error); | |
2706 | syscall_printf ("-1 = readlink (%s, %p, %d)", path, buf, buflen); | |
2707 | return -1; | |
2708 | } | |
1fd5e000 | 2709 | |
1870c688 CV |
2710 | if (!pathbuf.exists ()) |
2711 | { | |
2712 | set_errno (ENOENT); | |
2713 | return -1; | |
2714 | } | |
1fd5e000 | 2715 | |
1870c688 CV |
2716 | if (!pathbuf.issymlink ()) |
2717 | { | |
2718 | if (pathbuf.exists ()) | |
2719 | set_errno (EINVAL); | |
2720 | return -1; | |
2721 | } | |
81adfe28 | 2722 | |
1870c688 CV |
2723 | ssize_t len = min (buflen, strlen (pathbuf.get_win32 ())); |
2724 | memcpy (buf, pathbuf.get_win32 (), len); | |
2725 | ||
2726 | /* errno set by symlink.check if error */ | |
2727 | return len; | |
2728 | } | |
2729 | ||
2730 | /* Some programs rely on st_dev/st_ino being unique for each file. | |
2731 | Hash the path name and hope for the best. The hash arg is not | |
2732 | always initialized to zero since readdir needs to compute the | |
2733 | dirent ino_t based on a combination of the hash of the directory | |
2734 | done during the opendir call and the hash or the filename within | |
2735 | the directory. FIXME: Not bullet-proof. */ | |
2736 | /* Cygwin internal */ | |
2737 | __ino64_t __stdcall | |
2738 | hash_path_name (__ino64_t hash, PUNICODE_STRING name) | |
2739 | { | |
2740 | if (name->Length == 0) | |
2741 | return hash; | |
2742 | ||
2743 | /* Build up hash. Name is already normalized */ | |
2744 | USHORT len = name->Length / sizeof (WCHAR); | |
2745 | for (USHORT idx = 0; idx < len; ++idx) | |
2746 | hash = RtlUpcaseUnicodeChar (name->Buffer[idx]) | |
2747 | + (hash << 6) + (hash << 16) - hash; | |
2748 | return hash; | |
2749 | } | |
2750 | ||
2751 | __ino64_t __stdcall | |
2752 | hash_path_name (__ino64_t hash, PCWSTR name) | |
2753 | { | |
2754 | UNICODE_STRING uname; | |
2755 | RtlInitUnicodeString (&uname, name); | |
2756 | return hash_path_name (hash, &uname); | |
2757 | } | |
2758 | ||
2759 | __ino64_t __stdcall | |
2760 | hash_path_name (__ino64_t hash, const char *name) | |
2761 | { | |
2762 | UNICODE_STRING uname; | |
2763 | RtlCreateUnicodeStringFromAsciiz (&uname, name); | |
2764 | __ino64_t ret = hash_path_name (hash, &uname); | |
2765 | RtlFreeUnicodeString (&uname); | |
2766 | return ret; | |
2767 | } | |
2768 | ||
2769 | extern "C" char * | |
2770 | getcwd (char *buf, size_t ulen) | |
2771 | { | |
2772 | char* res = NULL; | |
2773 | myfault efault; | |
2774 | if (efault.faulted (EFAULT)) | |
2775 | /* errno set */; | |
2776 | else if (ulen == 0 && buf) | |
0aca521a | 2777 | set_errno (EINVAL); |
1870c688 CV |
2778 | else |
2779 | res = cygheap->cwd.get (buf, 1, 1, ulen); | |
2780 | return res; | |
2781 | } | |
2782 | ||
2783 | /* getwd: Legacy. */ | |
2784 | extern "C" char * | |
2785 | getwd (char *buf) | |
2786 | { | |
2787 | return getcwd (buf, PATH_MAX + 1); /*Per SuSv3!*/ | |
2788 | } | |
2789 | ||
2790 | /* chdir: POSIX 5.2.1.1 */ | |
2791 | extern "C" int | |
2792 | chdir (const char *in_dir) | |
2793 | { | |
2794 | myfault efault; | |
2795 | if (efault.faulted (EFAULT)) | |
7a4078ee | 2796 | return -1; |
1870c688 CV |
2797 | if (!*in_dir) |
2798 | { | |
2799 | set_errno (ENOENT); | |
2800 | return -1; | |
2801 | } | |
02782489 | 2802 | |
1870c688 | 2803 | syscall_printf ("dir '%s'", in_dir); |
1fd5e000 | 2804 | |
1870c688 CV |
2805 | /* Convert path. First argument ensures that we don't check for NULL/empty/invalid |
2806 | again. */ | |
2807 | path_conv path (PC_NONULLEMPTY, in_dir, PC_SYM_FOLLOW | PC_POSIX); | |
2808 | if (path.error) | |
2809 | { | |
2810 | set_errno (path.error); | |
2811 | syscall_printf ("-1 = chdir (%s)", in_dir); | |
2812 | return -1; | |
2813 | } | |
edab6053 | 2814 | |
1870c688 | 2815 | int res = -1; |
1870c688 CV |
2816 | const char *posix_cwd = NULL; |
2817 | int devn = path.get_devn (); | |
1279c76b CV |
2818 | if (!path.exists ()) |
2819 | set_errno (ENOENT); | |
2820 | else if (!path.isdir ()) | |
2821 | set_errno (ENOTDIR); | |
2822 | else if (!isvirtual_dev (devn)) | |
1870c688 CV |
2823 | { |
2824 | /* The sequence chdir("xx"); chdir(".."); must be a noop if xx | |
2825 | is not a symlink. This is exploited by find.exe. | |
2826 | The posix_cwd is just path.normalized_path. | |
2827 | In other cases we let cwd.set obtain the Posix path through | |
2828 | the mount table. */ | |
2829 | if (!isdrive(path.normalized_path)) | |
2830 | posix_cwd = path.normalized_path; | |
2831 | res = 0; | |
1870c688 | 2832 | } |
1870c688 CV |
2833 | else |
2834 | { | |
2835 | posix_cwd = path.normalized_path; | |
2836 | res = 0; | |
2837 | } | |
2838 | ||
2839 | if (!res) | |
260b8074 | 2840 | res = cygheap->cwd.set (&path, posix_cwd); |
1870c688 CV |
2841 | |
2842 | /* Note that we're accessing cwd.posix without a lock here. I didn't think | |
2843 | it was worth locking just for strace. */ | |
2844 | syscall_printf ("%d = chdir() cygheap->cwd.posix '%s' native '%S'", res, | |
b6c6ea43 | 2845 | cygheap->cwd.get_posix (), path.get_nt_native_path ()); |
1870c688 CV |
2846 | MALLOC_CHECK; |
2847 | return res; | |
2848 | } | |
2849 | ||
2850 | extern "C" int | |
2851 | fchdir (int fd) | |
2852 | { | |
2853 | int res; | |
2854 | cygheap_fdget cfd (fd); | |
2855 | if (cfd >= 0) | |
2856 | res = chdir (cfd->get_name ()); | |
2857 | else | |
2858 | res = -1; | |
2859 | ||
2860 | syscall_printf ("%d = fchdir (%d)", res, fd); | |
2861 | return res; | |
2862 | } | |
2863 | ||
2864 | /******************** Exported Path Routines *********************/ | |
2865 | ||
2866 | /* Cover functions to the path conversion routines. | |
2867 | These are exported to the world as cygwin_foo by cygwin.din. */ | |
edab6053 | 2868 | |
1870c688 CV |
2869 | #define return_with_errno(x) \ |
2870 | do {\ | |
2871 | int err = (x);\ | |
2872 | if (!err)\ | |
2873 | return 0;\ | |
2874 | set_errno (err);\ | |
2875 | return -1;\ | |
2876 | } while (0) | |
2877 | ||
2878 | extern "C" ssize_t | |
2879 | cygwin_conv_path (cygwin_conv_path_t what, const void *from, void *to, | |
2880 | size_t size) | |
2881 | { | |
2882 | tmp_pathbuf tp; | |
2883 | myfault efault; | |
2884 | if (efault.faulted (EFAULT)) | |
2885 | return -1; | |
1fd5e000 | 2886 | |
1870c688 CV |
2887 | path_conv p; |
2888 | size_t lsiz = 0; | |
2889 | char *buf = NULL; | |
06cc41a6 | 2890 | PWCHAR path = NULL; |
1870c688 CV |
2891 | int error = 0; |
2892 | bool relative = !!(what & CCP_RELATIVE); | |
2893 | what &= ~CCP_RELATIVE; | |
37169691 | 2894 | |
1870c688 CV |
2895 | switch (what) |
2896 | { | |
2897 | case CCP_POSIX_TO_WIN_A: | |
7b9e380f CF |
2898 | { |
2899 | p.check ((const char *) from, | |
2900 | PC_POSIX | PC_SYM_FOLLOW | PC_NO_ACCESS_CHECK | PC_NOWARN | |
2901 | | (relative ? PC_NOFULL : 0)); | |
2902 | if (p.error) | |
2903 | return_with_errno (p.error); | |
2904 | PUNICODE_STRING up = p.get_nt_native_path (); | |
2905 | buf = tp.c_get (); | |
2906 | sys_wcstombs (buf, NT_MAX_PATH, up->Buffer, up->Length / sizeof (WCHAR)); | |
2907 | /* Convert native path to standard DOS path. */ | |
2908 | if (!strncmp (buf, "\\??\\", 4)) | |
2909 | { | |
2910 | buf += 4; | |
2911 | if (buf[1] != ':') /* native UNC path */ | |
2912 | *(buf += 2) = '\\'; | |
2913 | } | |
43f65cdd CV |
2914 | else if (*buf == '\\') |
2915 | { | |
2916 | /* Device name points to somewhere else in the NT namespace. | |
2917 | Use GLOBALROOT prefix to convert to Win32 path. */ | |
2918 | char *p = stpcpy (buf, "\\\\.\\GLOBALROOT"); | |
2919 | sys_wcstombs (p, NT_MAX_PATH - (p - buf), | |
2920 | up->Buffer, up->Length / sizeof (WCHAR)); | |
2921 | } | |
7b9e380f | 2922 | lsiz = strlen (buf) + 1; |
59cb363a CV |
2923 | /* TODO: Incoming "." is a special case which leads to a trailing |
2924 | backslash ".\\" in the Win32 path. That's a result of the | |
2925 | conversion in normalize_posix_path. This should not occur | |
2926 | so the below code is just a band-aid. */ | |
06cc41a6 | 2927 | if (relative && !strcmp ((const char *) from, ".") |
59cb363a CV |
2928 | && !strcmp (buf, ".\\")) |
2929 | { | |
06cc41a6 CV |
2930 | lsiz = 2; |
2931 | buf[1] = '\0'; | |
59cb363a | 2932 | } |
7b9e380f | 2933 | } |
1870c688 CV |
2934 | break; |
2935 | case CCP_POSIX_TO_WIN_W: | |
ca027229 CV |
2936 | p.check ((const char *) from, PC_POSIX | PC_SYM_FOLLOW |
2937 | | PC_NO_ACCESS_CHECK | PC_NOWARN | |
2938 | | (relative ? PC_NOFULL : 0)); | |
1870c688 CV |
2939 | if (p.error) |
2940 | return_with_errno (p.error); | |
ca027229 CV |
2941 | /* Relative Windows paths are always restricted to MAX_PATH chars. */ |
2942 | if (relative && !isabspath (p.get_win32 ()) | |
2943 | && sys_mbstowcs (NULL, 0, p.get_win32 ()) > MAX_PATH) | |
2944 | { | |
2945 | /* Recreate as absolute path. */ | |
2946 | p.check ((const char *) from, PC_POSIX | PC_SYM_FOLLOW | |
2947 | | PC_NO_ACCESS_CHECK | PC_NOWARN); | |
2948 | if (p.error) | |
2949 | return_with_errno (p.error); | |
2950 | } | |
59cb363a | 2951 | lsiz = p.get_wide_win32_path_len () + 1; |
06cc41a6 CV |
2952 | path = p.get_nt_native_path ()->Buffer; |
2953 | ||
2954 | /* Convert native path to standard DOS path. */ | |
2955 | if (!wcsncmp (path, L"\\??\\", 4)) | |
2956 | { | |
2957 | path[1] = L'\\'; | |
2958 | ||
2959 | /* Drop long path prefix for short pathnames. Unfortunately there's | |
2960 | quite a bunch of Win32 functions, especially in user32.dll, | |
2961 | apparently, which don't grok long path names at all, not even | |
2962 | in the UNICODE API. */ | |
43f65cdd CV |
2963 | if ((path[5] == L':' && lsiz <= MAX_PATH + 4) |
2964 | || (!wcsncmp (path + 4, L"UNC\\", 4) && lsiz <= MAX_PATH + 6)) | |
06cc41a6 CV |
2965 | { |
2966 | path += 4; | |
2967 | lsiz -= 4; | |
2968 | if (path[1] != L':') | |
2969 | { | |
2970 | *(path += 2) = '\\'; | |
2971 | lsiz -= 2; | |
2972 | } | |
2973 | } | |
2974 | } | |
43f65cdd CV |
2975 | else if (*path == L'\\') |
2976 | { | |
2977 | /* Device name points to somewhere else in the NT namespace. | |
2978 | Use GLOBALROOT prefix to convert to Win32 path. */ | |
2979 | to = (void *) wcpcpy ((wchar_t *) to, L"\\\\.\\GLOBALROOT"); | |
2980 | lsiz += sizeof ("\\\\.\\GLOBALROOT") - 1; | |
2981 | } | |
59cb363a | 2982 | /* TODO: Same ".\\" band-aid as in CCP_POSIX_TO_WIN_A case. */ |
06cc41a6 CV |
2983 | if (relative && !strcmp ((const char *) from, ".") |
2984 | && !wcscmp (path, L".\\")) | |
59cb363a | 2985 | { |
06cc41a6 CV |
2986 | lsiz = 2; |
2987 | path[1] = L'\0'; | |
59cb363a CV |
2988 | } |
2989 | lsiz *= sizeof (WCHAR); | |
1870c688 CV |
2990 | break; |
2991 | case CCP_WIN_A_TO_POSIX: | |
2992 | buf = tp.c_get (); | |
2993 | error = mount_table->conv_to_posix_path ((const char *) from, buf, | |
2994 | relative); | |
2995 | if (error) | |
2996 | return_with_errno (error); | |
2997 | lsiz = strlen (buf) + 1; | |
2998 | break; | |
2999 | case CCP_WIN_W_TO_POSIX: | |
3000 | buf = tp.c_get (); | |
3001 | error = mount_table->conv_to_posix_path ((const PWCHAR) from, buf, | |
3002 | relative); | |
3003 | if (error) | |
3004 | return_with_errno (error); | |
3005 | lsiz = strlen (buf) + 1; | |
3006 | break; | |
3007 | default: | |
3008 | set_errno (EINVAL); | |
3009 | return -1; | |
3010 | } | |
3011 | if (!size) | |
3012 | return lsiz; | |
3013 | if (size < lsiz) | |
3014 | { | |
3015 | set_errno (ENOSPC); | |
3016 | return -1; | |
3017 | } | |
3018 | switch (what) | |
3019 | { | |
3020 | case CCP_POSIX_TO_WIN_A: | |
3021 | case CCP_WIN_A_TO_POSIX: | |
3022 | case CCP_WIN_W_TO_POSIX: | |
43f65cdd | 3023 | stpcpy ((char *) to, buf); |
1870c688 CV |
3024 | break; |
3025 | case CCP_POSIX_TO_WIN_W: | |
43f65cdd | 3026 | wcpcpy ((PWCHAR) to, path); |
1870c688 CV |
3027 | break; |
3028 | } | |
3029 | return 0; | |
3030 | } | |
3031 | ||
3032 | extern "C" void * | |
3033 | cygwin_create_path (cygwin_conv_path_t what, const void *from) | |
3034 | { | |
3035 | void *to; | |
3036 | ssize_t size = cygwin_conv_path (what, from, NULL, 0); | |
3037 | if (size <= 0) | |
27f1db48 CF |
3038 | to = NULL; |
3039 | else if (!(to = malloc (size))) | |
3040 | to = NULL; | |
1870c688 | 3041 | if (cygwin_conv_path (what, from, to, size) == -1) |
27f1db48 CF |
3042 | { |
3043 | free (to); | |
3044 | to = NULL; | |
3045 | } | |
1870c688 CV |
3046 | return to; |
3047 | } | |
3048 | ||
3049 | ||
3050 | extern "C" int | |
3051 | cygwin_conv_to_win32_path (const char *path, char *win32_path) | |
3052 | { | |
3053 | return cygwin_conv_path (CCP_POSIX_TO_WIN_A | CCP_RELATIVE, path, win32_path, | |
3054 | MAX_PATH); | |
3055 | } | |
3056 | ||
3057 | extern "C" int | |
3058 | cygwin_conv_to_full_win32_path (const char *path, char *win32_path) | |
3059 | { | |
3060 | return cygwin_conv_path (CCP_POSIX_TO_WIN_A | CCP_ABSOLUTE, path, win32_path, | |
3061 | MAX_PATH); | |
3062 | } | |
3063 | ||
3064 | /* This is exported to the world as cygwin_foo by cygwin.din. */ | |
3065 | ||
3066 | extern "C" int | |
3067 | cygwin_conv_to_posix_path (const char *path, char *posix_path) | |
3068 | { | |
3069 | return cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_RELATIVE, path, posix_path, | |
3070 | MAX_PATH); | |
3071 | } | |
3072 | ||
3073 | extern "C" int | |
3074 | cygwin_conv_to_full_posix_path (const char *path, char *posix_path) | |
3075 | { | |
3076 | return cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_ABSOLUTE, path, posix_path, | |
3077 | MAX_PATH); | |
3078 | } | |
3079 | ||
2bf78f09 | 3080 | /* The realpath function is required by POSIX:2008. */ |
1870c688 CV |
3081 | |
3082 | extern "C" char * | |
3083 | realpath (const char *path, char *resolved) | |
3084 | { | |
3085 | /* Make sure the right errno is returned if path is NULL. */ | |
3086 | if (!path) | |
3087 | { | |
3088 | set_errno (EINVAL); | |
3089 | return NULL; | |
3090 | } | |
63958f00 | 3091 | |
1870c688 CV |
3092 | /* Guard reading from a potentially invalid path and writing to a |
3093 | potentially invalid resolved. */ | |
3094 | tmp_pathbuf tp; | |
3095 | myfault efault; | |
3096 | if (efault.faulted (EFAULT)) | |
3097 | return NULL; | |
63958f00 | 3098 | |
1870c688 CV |
3099 | char *tpath; |
3100 | if (isdrive (path)) | |
3101 | { | |
3102 | tpath = tp.c_get (); | |
3103 | mount_table->cygdrive_posix_path (path, tpath, 0); | |
3104 | } | |
3105 | else | |
3106 | tpath = (char *) path; | |
63958f00 | 3107 | |
1870c688 | 3108 | path_conv real_path (tpath, PC_SYM_FOLLOW | PC_POSIX, stat_suffixes); |
37169691 | 3109 | |
1fd5e000 | 3110 | |
2bf78f09 EB |
3111 | /* POSIX 2008 requires malloc'ing if resolved is NULL, and states |
3112 | that using non-NULL resolved is asking for portability | |
3113 | problems. */ | |
1fd5e000 | 3114 | |
1870c688 CV |
3115 | if (!real_path.error && real_path.exists ()) |
3116 | { | |
3117 | if (!resolved) | |
3118 | { | |
3119 | resolved = (char *) malloc (strlen (real_path.normalized_path) + 1); | |
3120 | if (!resolved) | |
3121 | return NULL; | |
3122 | } | |
3123 | strcpy (resolved, real_path.normalized_path); | |
3124 | return resolved; | |
3125 | } | |
1fd5e000 | 3126 | |
2bf78f09 EB |
3127 | /* FIXME: on error, Linux puts the name of the path |
3128 | component which could not be resolved into RESOLVED, but POSIX | |
3129 | does not require this. */ | |
1870c688 CV |
3130 | if (resolved) |
3131 | resolved[0] = '\0'; | |
3132 | set_errno (real_path.error ?: ENOENT); | |
3133 | return NULL; | |
3134 | } | |
3135 | ||
2bf78f09 EB |
3136 | /* Linux provides this extension. Since the only portable use of |
3137 | realpath requires a NULL second argument, we might as well have a | |
3138 | one-argument wrapper. */ | |
3139 | extern "C" char * | |
3140 | canonicalize_file_name (const char *path) | |
3141 | { | |
3142 | return realpath (path, NULL); | |
3143 | } | |
3144 | ||
1870c688 CV |
3145 | /* Return non-zero if path is a POSIX path list. |
3146 | This is exported to the world as cygwin_foo by cygwin.din. | |
3147 | ||
3148 | DOCTOOL-START | |
3149 | <sect1 id="add-func-cygwin-posix-path-list-p"> | |
3150 | <para>Rather than use a mode to say what the "proper" path list | |
3151 | format is, we allow any, and give apps the tools they need to | |
3152 | convert between the two. If a ';' is present in the path list it's | |
3153 | a Win32 path list. Otherwise, if the first path begins with | |
3154 | [letter]: (in which case it can be the only element since if it | |
3155 | wasn't a ';' would be present) it's a Win32 path list. Otherwise, | |
3156 | it's a POSIX path list.</para> | |
3157 | </sect1> | |
3158 | DOCTOOL-END | |
3159 | */ | |
1fd5e000 | 3160 | |
1870c688 CV |
3161 | extern "C" int |
3162 | cygwin_posix_path_list_p (const char *path) | |
3163 | { | |
3164 | int posix_p = !(strchr (path, ';') || isdrive (path)); | |
3165 | return posix_p; | |
3166 | } | |
3167 | ||
3168 | /* These are used for apps that need to convert env vars like PATH back and | |
3169 | forth. The conversion is a two step process. First, an upper bound on the | |
3170 | size of the buffer needed is computed. Then the conversion is done. This | |
3171 | allows the caller to use alloca if it wants. */ | |
3172 | ||
3173 | static int | |
3174 | conv_path_list_buf_size (const char *path_list, bool to_posix) | |
3175 | { | |
3176 | int i, num_elms, max_mount_path_len, size; | |
3177 | const char *p; | |
3178 | ||
3179 | path_conv pc(".", PC_POSIX); | |
3180 | /* The theory is that an upper bound is | |
3181 | current_size + (num_elms * max_mount_path_len) */ | |
3182 | /* FIXME: This method is questionable in the long run. */ | |
3183 | ||
3184 | unsigned nrel; | |
3185 | char delim = to_posix ? ';' : ':'; | |
3186 | for (p = path_list, num_elms = nrel = 0; p; num_elms++) | |
3187 | { | |
3188 | if (!isabspath (p)) | |
3189 | nrel++; | |
3190 | p = strchr (++p, delim); | |
3191 | } | |
1fd5e000 | 3192 | |
1870c688 CV |
3193 | /* 7: strlen ("//c") + slop, a conservative initial value */ |
3194 | for (max_mount_path_len = sizeof ("/cygdrive/X"), i = 0; | |
3195 | i < mount_table->nmounts; i++) | |
3196 | { | |
3197 | int mount_len = (to_posix | |
3198 | ? mount_table->mount[i].posix_pathlen | |
3199 | : mount_table->mount[i].native_pathlen); | |
3200 | if (max_mount_path_len < mount_len) | |
3201 | max_mount_path_len = mount_len; | |
3202 | } | |
1fd5e000 | 3203 | |
1870c688 CV |
3204 | /* 100: slop */ |
3205 | size = strlen (path_list) | |
3206 | + (num_elms * max_mount_path_len) | |
3207 | + (nrel * strlen (to_posix ? pc.normalized_path : pc.get_win32 ())) | |
3208 | + 100; | |
3209 | ||
3210 | return size; | |
3211 | } | |
3212 | ||
3213 | ||
3214 | extern "C" int | |
3215 | cygwin_win32_to_posix_path_list_buf_size (const char *path_list) | |
3216 | { | |
3217 | return conv_path_list_buf_size (path_list, true); | |
3218 | } | |
3219 | ||
3220 | extern "C" int | |
3221 | cygwin_posix_to_win32_path_list_buf_size (const char *path_list) | |
3222 | { | |
3223 | return conv_path_list_buf_size (path_list, false); | |
3224 | } | |
3225 | ||
3226 | extern "C" ssize_t | |
3227 | env_PATH_to_posix (const void *win32, void *posix, size_t size) | |
3228 | { | |
3229 | return_with_errno (conv_path_list ((const char *) win32, (char *) posix, | |
3230 | size, ENV_CVT)); | |
3231 | } | |
3232 | ||
3233 | extern "C" int | |
3234 | cygwin_win32_to_posix_path_list (const char *win32, char *posix) | |
3235 | { | |
3236 | return_with_errno (conv_path_list (win32, posix, MAX_PATH, 1)); | |
3237 | } | |
3238 | ||
3239 | extern "C" int | |
3240 | cygwin_posix_to_win32_path_list (const char *posix, char *win32) | |
3241 | { | |
3242 | return_with_errno (conv_path_list (posix, win32, MAX_PATH, 0)); | |
3243 | } | |
3244 | ||
3245 | extern "C" ssize_t | |
3246 | cygwin_conv_path_list (cygwin_conv_path_t what, const void *from, void *to, | |
3247 | size_t size) | |
3248 | { | |
3249 | /* FIXME: Path lists are (so far) always retaining relative paths. */ | |
3250 | what &= ~CCP_RELATIVE; | |
3251 | switch (what) | |
3252 | { | |
3253 | case CCP_WIN_W_TO_POSIX: | |
3254 | case CCP_POSIX_TO_WIN_W: | |
3255 | /*FIXME*/ | |
3256 | api_fatal ("wide char path lists not yet supported"); | |
3257 | break; | |
3258 | case CCP_WIN_A_TO_POSIX: | |
3259 | case CCP_POSIX_TO_WIN_A: | |
3260 | if (size == 0) | |
3261 | return conv_path_list_buf_size ((const char *) from, | |
3262 | what == CCP_WIN_A_TO_POSIX); | |
3263 | return_with_errno (conv_path_list ((const char *) from, (char *) to, | |
3264 | size, what == CCP_WIN_A_TO_POSIX)); | |
3265 | break; | |
3266 | default: | |
3267 | break; | |
3268 | } | |
3269 | set_errno (EINVAL); | |
3270 | return -1; | |
3271 | } | |
3272 | ||
3273 | /* cygwin_split_path: Split a path into directory and file name parts. | |
3274 | Buffers DIR and FILE are assumed to be big enough. | |
3275 | ||
3276 | Examples (path -> `dir' / `file'): | |
3277 | / -> `/' / `' | |
3278 | "" -> `.' / `' | |
3279 | . -> `.' / `.' (FIXME: should this be `.' / `'?) | |
3280 | .. -> `.' / `..' (FIXME: should this be `..' / `'?) | |
3281 | foo -> `.' / `foo' | |
3282 | foo/bar -> `foo' / `bar' | |
3283 | foo/bar/ -> `foo' / `bar' | |
3284 | /foo -> `/' / `foo' | |
3285 | /foo/bar -> `/foo' / `bar' | |
3286 | c: -> `c:/' / `' | |
3287 | c:/ -> `c:/' / `' | |
3288 | c:foo -> `c:/' / `foo' | |
3289 | c:/foo -> `c:/' / `foo' | |
3290 | */ | |
3291 | ||
3292 | extern "C" void | |
3293 | cygwin_split_path (const char *path, char *dir, char *file) | |
3294 | { | |
3295 | int dir_started_p = 0; | |
3296 | ||
3297 | /* Deal with drives. | |
3298 | Remember that c:foo <==> c:/foo. */ | |
3299 | if (isdrive (path)) | |
3300 | { | |
3301 | *dir++ = *path++; | |
3302 | *dir++ = *path++; | |
3303 | *dir++ = '/'; | |
3304 | if (!*path) | |
3305 | { | |
3306 | *dir = 0; | |
3307 | *file = 0; | |
3308 | return; | |
3309 | } | |
3310 | if (isdirsep (*path)) | |
3311 | ++path; | |
3312 | dir_started_p = 1; | |
3313 | } | |
1fd5e000 | 3314 | |
1870c688 CV |
3315 | /* Determine if there are trailing slashes and "delete" them if present. |
3316 | We pretend as if they don't exist. */ | |
3317 | const char *end = path + strlen (path); | |
3318 | /* path + 1: keep leading slash. */ | |
3319 | while (end > path + 1 && isdirsep (end[-1])) | |
3320 | --end; | |
1fd5e000 | 3321 | |
1870c688 CV |
3322 | /* At this point, END points to one beyond the last character |
3323 | (with trailing slashes "deleted"). */ | |
1fd5e000 | 3324 | |
1870c688 CV |
3325 | /* Point LAST_SLASH at the last slash (duh...). */ |
3326 | const char *last_slash; | |
3327 | for (last_slash = end - 1; last_slash >= path; --last_slash) | |
3328 | if (isdirsep (*last_slash)) | |
3329 | break; | |
7e24f1bf | 3330 | |
1870c688 CV |
3331 | if (last_slash == path) |
3332 | { | |
3333 | *dir++ = '/'; | |
3334 | *dir = 0; | |
3335 | } | |
3336 | else if (last_slash > path) | |
3337 | { | |
3338 | memcpy (dir, path, last_slash - path); | |
3339 | dir[last_slash - path] = 0; | |
3340 | } | |
3341 | else | |
3342 | { | |
3343 | if (dir_started_p) | |
3344 | ; /* nothing to do */ | |
3345 | else | |
3346 | *dir++ = '.'; | |
3347 | *dir = 0; | |
3348 | } | |
09ecdc85 | 3349 | |
1870c688 CV |
3350 | memcpy (file, last_slash + 1, end - last_slash - 1); |
3351 | file[end - last_slash - 1] = 0; | |
3352 | } | |
3353 | ||
3354 | /*****************************************************************************/ | |
3355 | ||
9c154abe CV |
3356 | /* The find_fast_cwd_pointers function and parts of the |
3357 | cwdstuff::override_win32_cwd method are based on code using the | |
3358 | following license: | |
3359 | ||
3360 | Copyright 2010 John Carey. All rights reserved. | |
3361 | ||
3362 | Redistribution and use in source and binary forms, with or without | |
3363 | modification, are permitted provided that the following conditions | |
3364 | are met: | |
3365 | ||
3366 | 1. Redistributions of source code must retain the above | |
3367 | copyright notice, this list of conditions and the following | |
3368 | disclaimer. | |
3369 | ||
3370 | 2. Redistributions in binary form must reproduce the above | |
3371 | copyright notice, this list of conditions and the following | |
3372 | disclaimer in the documentation and/or other materials provided | |
3373 | with the distribution. | |
3374 | ||
3375 | THIS SOFTWARE IS PROVIDED BY JOHN CAREY ``AS IS'' AND ANY EXPRESS | |
3376 | OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
3377 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
3378 | ARE DISCLAIMED. IN NO EVENT SHALL JOHN CAREY OR CONTRIBUTORS BE | |
3379 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
3380 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT | |
3381 | OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
3382 | BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
3383 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
3384 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
3385 | USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH | |
3386 | DAMAGE. */ | |
3387 | ||
3388 | /* This structure is used to store the CWD starting with Windows Vista. | |
3389 | The CWD storage in the RTL_USER_PROCESS_PARAMETERS block is only | |
3390 | an afterthought now. The actual CWD storage is a FAST_CWD structure | |
3391 | which is allocated on the process heap. The new method only requires | |
3392 | minimal locking and it's much more multi-thread friendly. Presumably | |
3393 | it minimizes contention when accessing the CWD. */ | |
3394 | typedef struct _FAST_CWD { | |
3395 | LONG ReferenceCount; /* Only release when this is 0. */ | |
3396 | HANDLE DirectoryHandle; | |
3397 | ULONG OldDismountCount; /* Reflects the system DismountCount | |
3398 | at the time the CWD has been set. */ | |
3399 | UNICODE_STRING Path; /* Path's Buffer member always refers | |
3400 | to the following Buffer array. */ | |
3401 | WCHAR Buffer[MAX_PATH]; | |
3402 | } FAST_CWD, *PFAST_CWD; | |
3403 | ||
3404 | /* fast_cwd_ptr is a pointer to the global pointer in ntdll.dll pointing | |
3405 | to the FAST_CWD structure which constitutes the CWD. | |
3406 | ||
3407 | We put the pointer into the common shared DLL segment. This allows to | |
3408 | restrict the call to find_fast_cwd_pointers() to once per Cygwin session | |
3409 | per user session. This works, because ASLR randomizes the load address | |
3410 | of DLLs only once at boot time. */ | |
3411 | static PFAST_CWD *fast_cwd_ptr | |
3412 | __attribute__((section (".cygwin_dll_common"), shared)) = (PFAST_CWD *) -1; | |
3413 | ||
3414 | /* This is the mapping of the KUSER_SHARED_DATA structure into the 32 bit | |
3415 | user address space. We need it here to access the current DismountCount. */ | |
3416 | static KUSER_SHARED_DATA &SharedUserData | |
3417 | = *(volatile PKUSER_SHARED_DATA) 0x7ffe0000; | |
3418 | ||
3419 | #define peek32(x) (*(uint32_t *)(x)) | |
3420 | ||
3421 | /* This function scans the code in ntdll.dll to find the address of the | |
3422 | global variable used to access the CWD starting with Vista. While the | |
3423 | pointer is global, it's not exported from the DLL, unfortunately. | |
3424 | Therefore we have to use some knowledge to figure out the address. | |
3425 | ||
3426 | This code has been tested on Vista 32/64 bit, Server 2008 32/64 bit, | |
3427 | Windows 7 32/64 bit, and Server 2008 R2 (which is only 64 bit anyway). | |
3428 | There's some hope that this will still work for Windows 8... */ | |
3429 | static void | |
3430 | find_fast_cwd_pointers () | |
3431 | { | |
3432 | /* Note that we have been called. */ | |
3433 | fast_cwd_ptr = NULL; | |
3434 | /* Fetch entry points of relevant functions in ntdll.dll. */ | |
3435 | HMODULE ntdll = GetModuleHandle ("ntdll.dll"); | |
3436 | if (!ntdll) | |
3437 | return; | |
3438 | const uint8_t *get_dir = (const uint8_t *) | |
3439 | GetProcAddress (ntdll, "RtlGetCurrentDirectory_U"); | |
3440 | const uint8_t *ent_crit = (const uint8_t *) | |
3441 | GetProcAddress (ntdll, "RtlEnterCriticalSection"); | |
3442 | if (!get_dir || !ent_crit) | |
3443 | return; | |
3444 | /* Search first relative call instruction in RtlGetCurrentDirectory_U. */ | |
3445 | const uint8_t *rcall = (const uint8_t *) memchr (get_dir, 0xe8, 32); | |
3446 | if (!rcall) | |
3447 | return; | |
3448 | /* Fetch offset from instruction and compute address of called function. | |
3449 | This function actually fetches the current FAST_CWD instance and | |
3450 | performs some other actions, not important to us. */ | |
3451 | ptrdiff_t offset = (ptrdiff_t) peek32 (rcall + 1); | |
3452 | const uint8_t *use_cwd = rcall + 5 + offset; | |
3453 | /* Find first "push edi" instruction. */ | |
3454 | const uint8_t *pushedi = (const uint8_t *) memchr (use_cwd, 0x57, 32); | |
3455 | /* ...which should be followed by "mov edi, crit-sect-addr" then | |
3456 | "push edi". */ | |
3457 | const uint8_t *movedi = pushedi + 1; | |
3458 | if (movedi[0] != 0xbf || movedi[5] != 0x57) | |
3459 | return; | |
3460 | /* Compare the address used for the critical section with the known | |
3461 | PEB lock as stored in the PEB. */ | |
3462 | if ((PRTL_CRITICAL_SECTION) peek32 (movedi + 1) | |
3463 | != NtCurrentTeb ()->Peb->FastPebLock) | |
3464 | return; | |
3465 | /* To check we are seeing the right code, we check our expectation that | |
3466 | the next instruction is a relative call into RtlEnterCriticalSection. */ | |
3467 | rcall = movedi + 6; | |
3468 | if (rcall[0] != 0xe8) | |
3469 | return; | |
3470 | /* Check that this is a relative call to RtlEnterCriticalSection. */ | |
3471 | offset = (ptrdiff_t) peek32 (rcall + 1); | |
3472 | if (rcall + 5 + offset != ent_crit) | |
3473 | return; | |
3474 | /* After locking the critical section, the code should read the global | |
3475 | PFAST_CWD * pointer that is guarded by that critical section. */ | |
3476 | const uint8_t *movesi = rcall + 5; | |
3477 | if (movesi[0] != 0x8b) | |
3478 | return; | |
3479 | fast_cwd_ptr = (PFAST_CWD *) peek32 (movesi + 2); | |
3480 | #ifdef DEBUGGING | |
3481 | system_printf ("fast_cwd_ptr: %p", fast_cwd_ptr); | |
3482 | #endif | |
3483 | } | |
3484 | ||
3485 | static inline void | |
3486 | copy_cwd_str (PUNICODE_STRING tgt, PUNICODE_STRING src) | |
1870c688 | 3487 | { |
9c154abe CV |
3488 | RtlCopyUnicodeString (tgt, src); |
3489 | if (tgt->Buffer[tgt->Length / sizeof (WCHAR) - 1] != L'\\') | |
3490 | { | |
3491 | tgt->Buffer[tgt->Length / sizeof (WCHAR)] = L'\\'; | |
3492 | tgt->Length += sizeof (WCHAR); | |
3493 | } | |
3494 | } | |
3495 | ||
3496 | void | |
3497 | cwdstuff::override_win32_cwd (bool init, ULONG old_dismount_count) | |
3498 | { | |
3499 | NTSTATUS status; | |
3500 | HANDLE h = NULL; | |
3501 | ||
3502 | PEB &peb = *NtCurrentTeb ()->Peb; | |
3503 | UNICODE_STRING &upp_cwd_str = peb.ProcessParameters->CurrentDirectoryName; | |
3504 | HANDLE &upp_cwd_hdl = peb.ProcessParameters->CurrentDirectoryHandle; | |
3505 | ||
3506 | if (wincap.has_fast_cwd ()) | |
3507 | { | |
3508 | if (fast_cwd_ptr == (PFAST_CWD *) -1) | |
3509 | { | |
3510 | find_fast_cwd_pointers (); | |
3511 | if (!fast_cwd_ptr) | |
3512 | system_printf ("WARNING: Couldn't compute FAST_CWD pointer. " | |
3513 | "Please report this problem to\nthe public mailing " | |
3514 | "list cygwin@cygwin.com"); | |
3515 | } | |
3516 | if (fast_cwd_ptr) | |
3517 | { | |
3518 | /* Default method starting with Vista. If we got a valid value for | |
3519 | fast_cwd_ptr, we can simply replace the RtlSetCurrentDirectory_U | |
3520 | function entirely, just as on pre-Vista. */ | |
3521 | PVOID heap = peb.ProcessHeap; | |
3522 | /* First allocate a new FAST_CWD strcuture on the heap. */ | |
3523 | PFAST_CWD f_cwd = (PFAST_CWD) | |
3524 | RtlAllocateHeap (heap, 0, sizeof (FAST_CWD)); | |
3525 | if (!f_cwd) | |
3526 | { | |
3527 | debug_printf ("RtlAllocateHeap failed"); | |
3528 | return; | |
3529 | } | |
3530 | /* Fill in the values. */ | |
3531 | f_cwd->ReferenceCount = 1; | |
3532 | f_cwd->DirectoryHandle = dir; | |
3533 | f_cwd->OldDismountCount = old_dismount_count; | |
3534 | RtlInitEmptyUnicodeString (&f_cwd->Path, f_cwd->Buffer, | |
3535 | MAX_PATH * sizeof (WCHAR)); | |
3536 | copy_cwd_str (&f_cwd->Path, error ? &ro_u_pipedir : &win32); | |
3537 | /* Use PEB lock when switching fast_cwd_ptr to the new FAST_CWD | |
3538 | structure and writing the CWD to the user process parameter | |
3539 | block. This is equivalent to calling RtlAcquirePebLock/ | |
3540 | RtlReleasePebLock, but without having to go through the FS | |
3541 | selector again. */ | |
3542 | RtlEnterCriticalSection (peb.FastPebLock); | |
3543 | PFAST_CWD old_cwd = *fast_cwd_ptr; | |
3544 | *fast_cwd_ptr = f_cwd; | |
3545 | upp_cwd_str = f_cwd->Path; | |
3546 | upp_cwd_hdl = dir; | |
3547 | RtlLeaveCriticalSection (peb.FastPebLock); | |
3548 | /* Decrement the reference count. If it's down to 0, free structure | |
3549 | from heap. */ | |
3550 | if (old_cwd && InterlockedDecrement (&old_cwd->ReferenceCount) == 0) | |
3551 | { | |
3552 | /* In contrast to pre-Vista, the handle on init is always a fresh | |
3553 | one and not the handle inherited from the parent process. So | |
3554 | we always have to close it here. However, the handle could | |
3555 | be NULL, if we cd'ed into a virtual dir. */ | |
3556 | if (old_cwd->DirectoryHandle) | |
3557 | NtClose (old_cwd->DirectoryHandle); | |
3558 | RtlFreeHeap (heap, 0, old_cwd); | |
3559 | } | |
3560 | } | |
3561 | else | |
3562 | { | |
3563 | /* This is more a hack, and it's only used on Vista and later if we | |
3564 | failed to find the fast_cwd_ptr value. What we do here is to call | |
3565 | RtlSetCurrentDirectory_U and let it set up a new FAST_CWD | |
3566 | structure. Afterwards, compute the address of that structure | |
3567 | utilizing the fact that the buffer address in the user process | |
3568 | parameter block is actually pointing to the buffer in that | |
3569 | FAST_CWD structure. Then replace the directory handle in that | |
3570 | structure with our own handle and close the original one. | |
3571 | ||
3572 | Note that the call to RtlSetCurrentDirectory_U also closes our | |
3573 | old dir handle, so there won't be any handle left open. | |
3574 | ||
3575 | This method is prone to two race conditions: | |
3576 | ||
3577 | - Due to the way RtlSetCurrentDirectory_U opens the directory | |
3578 | handle, the directory is locked against deletion or renaming | |
3579 | between the RtlSetCurrentDirectory_U and the subsequent NtClose | |
3580 | call. | |
3581 | ||
3582 | - When another thread calls SetCurrentDirectory at exactly the | |
3583 | same time, a crash might occur, or worse, unrelated data could | |
3584 | be overwritten or NtClose could be called on an unrelated handle. | |
3585 | ||
3586 | Therefore, use this *only* as a fallback. */ | |
3587 | if (!init) | |
3588 | { | |
3589 | status = RtlSetCurrentDirectory_U (error ? &ro_u_pipedir | |
3590 | : &win32); | |
3591 | if (!NT_SUCCESS (status)) | |
3592 | { | |
3593 | debug_printf ("RtlSetCurrentDirectory_U(%S) failed, %p", | |
3594 | error ? &ro_u_pipedir : &win32, status); | |
3595 | return; | |
3596 | } | |
3597 | } | |
3598 | RtlEnterCriticalSection (peb.FastPebLock); | |
3599 | PFAST_CWD f_cwd = (PFAST_CWD) | |
3600 | ((PBYTE) upp_cwd_str.Buffer | |
3601 | - __builtin_offsetof (struct _FAST_CWD, Buffer)); | |
3602 | h = upp_cwd_hdl; | |
3603 | f_cwd->DirectoryHandle = upp_cwd_hdl = dir; | |
3604 | RtlLeaveCriticalSection (peb.FastPebLock); | |
3605 | /* In contrast to pre-Vista, the handle on init is always a fresh one | |
3606 | and not the handle inherited from the parent process. So we always | |
3607 | have to close it here. */ | |
3608 | NtClose (h); | |
3609 | } | |
3610 | } | |
3611 | else | |
3612 | { | |
3613 | /* This method is used for all pre-Vista OSes. We simply set the values | |
3614 | for the CWD in the user process parameter block entirely by ourselves | |
3615 | under PEB lock condition. This is how RtlSetCurrentDirectory_U worked | |
3616 | in these older OSes, so we're safe. | |
3617 | ||
3618 | Note that we can't just RtlEnterCriticalSection (peb.FastPebLock) | |
3619 | on pre-Vista. RtlAcquirePebLock was way more complicated back then. */ | |
3620 | RtlAcquirePebLock (); | |
3621 | if (!init) | |
3622 | copy_cwd_str (&upp_cwd_str, error ? &ro_u_pipedir : &win32); | |
3623 | h = upp_cwd_hdl; | |
3624 | upp_cwd_hdl = dir; | |
3625 | RtlReleasePebLock (); | |
3626 | /* Only on init, the handle is potentially a native handle. However, | |
3627 | if it's identical to dir, it's the inherited handle from a Cygwin | |
3628 | parent process and must not be closed. */ | |
3629 | if (h && h != dir) | |
3630 | NtClose (h); | |
3631 | } | |
1870c688 CV |
3632 | } |
3633 | ||
3634 | /* Initialize cygcwd 'muto' for serializing access to cwd info. */ | |
3635 | void | |
3636 | cwdstuff::init () | |
3637 | { | |
3638 | cwd_lock.init ("cwd_lock"); | |
260b8074 CV |
3639 | |
3640 | /* Cygwin processes inherit the cwd from their parent. If the win32 path | |
9c154abe CV |
3641 | buffer is not NULL, the cwd struct is already set up, and we only |
3642 | have to override the Win32 CWD with ours. */ | |
260b8074 | 3643 | if (win32.Buffer) |
9c154abe CV |
3644 | override_win32_cwd (true, SharedUserData.DismountCount); |
3645 | else | |
3646 | /* Initially re-open the cwd to allow POSIX semantics. */ | |
3647 | set (NULL, NULL); | |
1870c688 CV |
3648 | } |
3649 | ||
3650 | /* Chdir and fill out the elements of a cwdstuff struct. */ | |
3651 | int | |
260b8074 | 3652 | cwdstuff::set (path_conv *nat_cwd, const char *posix_cwd) |
1870c688 | 3653 | { |
1121c57f | 3654 | NTSTATUS status; |
1870c688 | 3655 | UNICODE_STRING upath; |
9c154abe | 3656 | PEB &peb = *NtCurrentTeb ()->Peb; |
260b8074 CV |
3657 | bool virtual_path = false; |
3658 | bool unc_path = false; | |
3659 | bool inaccessible_path = false; | |
3660 | ||
1121c57f CV |
3661 | /* Here are the problems with using SetCurrentDirectory. Just skip this |
3662 | comment if you don't like whining. | |
260b8074 CV |
3663 | |
3664 | - SetCurrentDirectory only supports paths of up to MAX_PATH - 1 chars, | |
3665 | including a trailing backslash. That's an absolute restriction, even | |
3666 | in the UNICODE API. | |
3667 | ||
1121c57f CV |
3668 | - SetCurrentDirectory fails for directories with strict permissions even |
3669 | for processes with the SE_BACKUP_NAME privilege enabled. The reason | |
3670 | is apparently that SetCurrentDirectory calls NtOpenFile without the | |
260b8074 CV |
3671 | FILE_OPEN_FOR_BACKUP_INTENT flag set. |
3672 | ||
3673 | - SetCurrentDirectory does not support case-sensitivity. | |
3674 | ||
1121c57f CV |
3675 | - Unlinking a cwd fails because SetCurrentDirectory seems to open |
3676 | directories so that deleting the directory is disallowed. | |
260b8074 CV |
3677 | |
3678 | - SetCurrentDirectory can naturally not work on virtual Cygwin paths | |
3679 | like /proc or /cygdrive. | |
3680 | ||
1121c57f CV |
3681 | Unfortunately, even though we have access to the Win32 process parameter |
3682 | block, we can't just replace the directory handle. Starting with Vista, | |
3683 | the handle is used elsewhere, and just replacing the handle in the process | |
3684 | parameter block shows quite surprising results. | |
3685 | FIXME: If we ever find a *safe* way to replace the directory handle in | |
3686 | the process parameter block, we're back in business. | |
3687 | ||
3688 | Nevertheless, doing entirely without SetCurrentDirectory is not really | |
3689 | feasible, because it breaks too many mixed applications using the Win32 | |
3690 | API. | |
3691 | ||
3692 | Therefore we handle the CWD all by ourselves and just keep the Win32 | |
3693 | CWD in sync. However, to avoid surprising behaviour in the Win32 API | |
3694 | when we are in a CWD which is inaccessible as Win32 CWD, we set the | |
3695 | Win32 CWD to a "weird" directory in which all relative filesystem-related | |
3696 | calls fail. */ | |
1870c688 CV |
3697 | |
3698 | cwd_lock.acquire (); | |
3699 | ||
3700 | if (nat_cwd) | |
3701 | { | |
260b8074 CV |
3702 | upath = *nat_cwd->get_nt_native_path (); |
3703 | if (nat_cwd->isspecial ()) | |
3704 | virtual_path = true; | |
1870c688 | 3705 | } |
09ecdc85 | 3706 | |
9c154abe CV |
3707 | /* Memorize old DismountCount before opening the dir. This value is |
3708 | stored in the FAST_CWD structure on Vista and later. It would be | |
3709 | simpler to fetch the old DismountCount in override_win32_cwd, but | |
3710 | Windows also fetches it before opening the directory handle. It's | |
3711 | not quite clear if that's really required, but since we don't know | |
3712 | the side effects of this action, we better follow Windows' lead. */ | |
3713 | ULONG old_dismount_count = SharedUserData.DismountCount; | |
260b8074 CV |
3714 | /* Open a directory handle with FILE_OPEN_FOR_BACKUP_INTENT and with all |
3715 | sharing flags set. The handle is right now used in exceptions.cc only, | |
3716 | but that might change in future. */ | |
75a3b858 | 3717 | HANDLE h = NULL; |
260b8074 | 3718 | if (!virtual_path) |
1870c688 | 3719 | { |
1870c688 CV |
3720 | IO_STATUS_BLOCK io; |
3721 | OBJECT_ATTRIBUTES attr; | |
260b8074 CV |
3722 | |
3723 | if (!nat_cwd) | |
3724 | { | |
3725 | /* On init, just reopen Win32 CWD with desired access flags. | |
3726 | We can access the PEB without lock, because no other thread | |
3727 | can change the CWD. */ | |
3728 | RtlInitUnicodeString (&upath, L""); | |
3729 | InitializeObjectAttributes (&attr, &upath, | |
3730 | OBJ_CASE_INSENSITIVE | OBJ_INHERIT, | |
9c154abe | 3731 | peb.ProcessParameters->CurrentDirectoryHandle, NULL); |
260b8074 CV |
3732 | } |
3733 | else | |
3734 | InitializeObjectAttributes (&attr, &upath, | |
3735 | nat_cwd->objcaseinsensitive () | OBJ_INHERIT, | |
3736 | NULL, NULL); | |
3737 | /* First try without FILE_OPEN_FOR_BACKUP_INTENT, to find out if the | |
1121c57f CV |
3738 | directory is valid for Win32 apps. And, no, we can't just call |
3739 | SetCurrentDirectory here, since that would potentially break | |
3740 | case-sensitivity. */ | |
1870c688 CV |
3741 | status = NtOpenFile (&h, SYNCHRONIZE | FILE_TRAVERSE, &attr, &io, |
3742 | FILE_SHARE_VALID_FLAGS, | |
3743 | FILE_DIRECTORY_FILE | |
260b8074 CV |
3744 | | FILE_SYNCHRONOUS_IO_NONALERT); |
3745 | if (status == STATUS_ACCESS_DENIED) | |
3746 | { | |
3747 | status = NtOpenFile (&h, SYNCHRONIZE | FILE_TRAVERSE, &attr, &io, | |
3748 | FILE_SHARE_VALID_FLAGS, | |
3749 | FILE_DIRECTORY_FILE | |
3750 | | FILE_SYNCHRONOUS_IO_NONALERT | |
3751 | | FILE_OPEN_FOR_BACKUP_INTENT); | |
3752 | inaccessible_path = true; | |
3753 | } | |
1870c688 CV |
3754 | if (!NT_SUCCESS (status)) |
3755 | { | |
260b8074 | 3756 | cwd_lock.release (); |
1870c688 | 3757 | __seterrno_from_nt_status (status); |
260b8074 | 3758 | return -1; |
1870c688 | 3759 | } |
260b8074 | 3760 | } |
9c154abe CV |
3761 | /* Set new handle. Note that we simply overwrite the old handle here |
3762 | without closing it. The handle is also used as Win32 CWD handle in | |
3763 | the user parameter block, and it will be closed in override_win32_cwd, | |
3764 | if required. */ | |
75a3b858 | 3765 | dir = h; |
260b8074 CV |
3766 | |
3767 | if (!nat_cwd) | |
3768 | { | |
3769 | /* On init, just fetch the Win32 dir from the PEB. We can access | |
3770 | the PEB without lock, because no other thread can change the CWD | |
3771 | at that time. */ | |
9c154abe | 3772 | PUNICODE_STRING pdir = &peb.ProcessParameters->CurrentDirectoryName; |
260b8074 CV |
3773 | RtlInitEmptyUnicodeString (&win32, |
3774 | (PWCHAR) crealloc_abort (win32.Buffer, | |
b53c1929 CV |
3775 | pdir->Length |
3776 | + sizeof (WCHAR)), | |
3777 | pdir->Length + sizeof (WCHAR)); | |
260b8074 CV |
3778 | RtlCopyUnicodeString (&win32, pdir); |
3779 | ||
3780 | PWSTR eoBuffer = win32.Buffer + (win32.Length / sizeof (WCHAR)); | |
3781 | /* Remove trailing slash if one exists. */ | |
3782 | if ((eoBuffer - win32.Buffer) > 3 && eoBuffer[-1] == L'\\') | |
3783 | win32.Length -= sizeof (WCHAR); | |
3784 | if (eoBuffer[0] == L'\\') | |
3785 | unc_path = true; | |
3786 | ||
3787 | posix_cwd = NULL; | |
260b8074 CV |
3788 | } |
3789 | else | |
3790 | { | |
3791 | if (virtual_path) /* don't mangle virtual path. */ | |
3792 | ; | |
1870c688 | 3793 | else |
1870c688 | 3794 | { |
260b8074 CV |
3795 | /* Compute length on Win32 path. */ |
3796 | size_t len = upath.Length / sizeof (WCHAR) - 4; | |
3797 | if (RtlEqualUnicodePathPrefix (&upath, &ro_u_uncp, TRUE)) | |
3798 | { | |
3799 | len -= 2; | |
3800 | unc_path = true; | |
3801 | } | |
1870c688 CV |
3802 | /* Convert to a Win32 path. */ |
3803 | upath.Buffer += upath.Length / sizeof (WCHAR) - len; | |
1870c688 | 3804 | upath.Length = len * sizeof (WCHAR); |
7e24f1bf | 3805 | |
260b8074 CV |
3806 | PWSTR eoBuffer = upath.Buffer + (upath.Length / sizeof (WCHAR)); |
3807 | /* Remove trailing slash if one exists. */ | |
3808 | if ((eoBuffer - upath.Buffer) > 3 && eoBuffer[-1] == L'\\') | |
3809 | upath.Length -= sizeof (WCHAR); | |
3810 | } | |
3811 | RtlInitEmptyUnicodeString (&win32, | |
3812 | (PWCHAR) crealloc_abort (win32.Buffer, | |
b53c1929 CV |
3813 | upath.Length |
3814 | + sizeof (WCHAR)), | |
3815 | upath.Length + sizeof (WCHAR)); | |
260b8074 CV |
3816 | RtlCopyUnicodeString (&win32, &upath); |
3817 | if (unc_path) | |
3818 | win32.Buffer[0] = L'\\'; | |
3819 | } | |
3820 | /* Make sure it's NUL-terminated. */ | |
3821 | win32.Buffer[win32.Length / sizeof (WCHAR)] = L'\0'; | |
3822 | ||
3823 | /* Set drive_length, used in path conversion, and error code, used in | |
3824 | spawn_guts to decide whether a native Win32 app can be started or not. */ | |
3825 | if (virtual_path) | |
3826 | { | |
3827 | drive_length = 0; | |
3828 | error = ENOTDIR; | |
1870c688 | 3829 | } |
260b8074 | 3830 | else |
1870c688 | 3831 | { |
260b8074 | 3832 | if (!unc_path) |
1870c688 | 3833 | drive_length = 2; |
260b8074 | 3834 | else |
1870c688 CV |
3835 | { |
3836 | PWCHAR ptr = wcschr (win32.Buffer + 2, L'\\'); | |
3837 | if (ptr) | |
3838 | ptr = wcschr (ptr + 1, L'\\'); | |
3839 | if (ptr) | |
3840 | drive_length = ptr - win32.Buffer; | |
3841 | else | |
3842 | drive_length = win32.Length / sizeof (WCHAR); | |
3843 | } | |
260b8074 CV |
3844 | if (inaccessible_path) |
3845 | error = EACCES; | |
3846 | else if (win32.Length > (MAX_PATH - 2) * sizeof (WCHAR)) | |
3847 | error = ENAMETOOLONG; | |
3848 | else | |
3849 | error = 0; | |
3850 | } | |
1121c57f CV |
3851 | /* Keep the Win32 CWD in sync. Don't check for error, other than for |
3852 | strace output. Try to keep overhead low. */ | |
9c154abe | 3853 | override_win32_cwd (!nat_cwd, old_dismount_count); |
1870c688 | 3854 | |
260b8074 CV |
3855 | /* Eventually, create POSIX path if it's not set on entry. */ |
3856 | tmp_pathbuf tp; | |
3857 | if (!posix_cwd) | |
3858 | { | |
3859 | posix_cwd = (const char *) tp.c_get (); | |
3860 | mount_table->conv_to_posix_path (win32.Buffer, (char *) posix_cwd, 0); | |
1870c688 | 3861 | } |
260b8074 CV |
3862 | posix = (char *) crealloc_abort (posix, strlen (posix_cwd) + 1); |
3863 | stpcpy (posix, posix_cwd); | |
7e24f1bf | 3864 | |
1870c688 | 3865 | cwd_lock.release (); |
260b8074 CV |
3866 | return 0; |
3867 | } | |
3868 | ||
3869 | const char * | |
3870 | cwdstuff::get_error_desc () const | |
3871 | { | |
3872 | switch (cygheap->cwd.get_error ()) | |
3873 | { | |
3874 | case EACCES: | |
3875 | return "has restricted permissions which render it\n" | |
3876 | "inaccessible as Win32 working directory"; | |
3877 | case ENOTDIR: | |
3878 | return "is a virtual Cygwin directory which does\n" | |
3879 | "not exist for a native Windows application"; | |
3880 | case ENAMETOOLONG: | |
3881 | return "has a path longer than allowed for a\n" | |
3882 | "Win32 working directory"; | |
3883 | default: | |
3884 | break; | |
3885 | } | |
3886 | /* That shouldn't occur, unless we defined a new error code | |
3887 | in cwdstuff::set. */ | |
3888 | return "is not accessible for some unknown reason"; | |
1870c688 CV |
3889 | } |
3890 | ||
ee42ccd3 CV |
3891 | /* Store incoming wchar_t path as current posix cwd. This is called from |
3892 | setlocale so that the cwd is always stored in the right charset. */ | |
3893 | void | |
3894 | cwdstuff::reset_posix (wchar_t *w_cwd) | |
b6c6ea43 | 3895 | { |
ee42ccd3 CV |
3896 | size_t len = sys_wcstombs (NULL, (size_t) -1, w_cwd); |
3897 | posix = (char *) crealloc_abort (posix, len + 1); | |
3898 | sys_wcstombs (posix, len + 1, w_cwd); | |
b6c6ea43 CV |
3899 | } |
3900 | ||
1870c688 CV |
3901 | char * |
3902 | cwdstuff::get (char *buf, int need_posix, int with_chroot, unsigned ulen) | |
3903 | { | |
3904 | MALLOC_CHECK; | |
3905 | ||
3906 | tmp_pathbuf tp; | |
3907 | if (ulen) | |
3908 | /* nothing */; | |
3909 | else if (buf == NULL) | |
3910 | ulen = (unsigned) -1; | |
3911 | else | |
3912 | { | |
3913 | set_errno (EINVAL); | |
3914 | goto out; | |
3915 | } | |
7e24f1bf | 3916 | |
1870c688 | 3917 | cwd_lock.acquire (); |
7e24f1bf | 3918 | |
1870c688 CV |
3919 | char *tocopy; |
3920 | if (!need_posix) | |
3921 | { | |
3922 | tocopy = tp.c_get (); | |
3923 | sys_wcstombs (tocopy, NT_MAX_PATH, win32.Buffer, | |
3924 | win32.Length / sizeof (WCHAR)); | |
3925 | } | |
3926 | else | |
3927 | tocopy = posix; | |
7905c4f1 | 3928 | |
1870c688 CV |
3929 | debug_printf ("posix %s", posix); |
3930 | if (strlen (tocopy) >= ulen) | |
3931 | { | |
3932 | set_errno (ERANGE); | |
3933 | buf = NULL; | |
3934 | } | |
3935 | else | |
3936 | { | |
3937 | if (!buf) | |
3938 | buf = (char *) malloc (strlen (tocopy) + 1); | |
3939 | strcpy (buf, tocopy); | |
3940 | if (!buf[0]) /* Should only happen when chroot */ | |
3941 | strcpy (buf, "/"); | |
3942 | } | |
7905c4f1 | 3943 | |
1870c688 CV |
3944 | cwd_lock.release (); |
3945 | ||
3946 | out: | |
3947 | syscall_printf ("(%s) = cwdstuff::get (%p, %d, %d, %d), errno %d", | |
3948 | buf, buf, ulen, need_posix, with_chroot, errno); | |
3949 | MALLOC_CHECK; | |
3950 | return buf; | |
3951 | } | |
3952 | ||
3953 | int etc::curr_ix = 0; | |
3954 | /* Note that the first elements of the below arrays are unused */ | |
3955 | bool etc::change_possible[MAX_ETC_FILES + 1]; | |
3956 | OBJECT_ATTRIBUTES etc::fn[MAX_ETC_FILES + 1]; | |
3957 | LARGE_INTEGER etc::last_modified[MAX_ETC_FILES + 1]; | |
3958 | ||
3959 | int | |
520fcc97 | 3960 | etc::init (int n, POBJECT_ATTRIBUTES attr) |
1870c688 CV |
3961 | { |
3962 | if (n > 0) | |
3963 | /* ok */; | |
3964 | else if (++curr_ix <= MAX_ETC_FILES) | |
3965 | n = curr_ix; | |
3966 | else | |
3967 | api_fatal ("internal error"); | |
3968 | ||
520fcc97 | 3969 | fn[n] = *attr; |
1870c688 CV |
3970 | change_possible[n] = false; |
3971 | test_file_change (n); | |
3972 | paranoid_printf ("fn[%d] %S, curr_ix %d", n, fn[n].ObjectName, curr_ix); | |
3973 | return n; | |
3974 | } | |
3975 | ||
3976 | bool | |
3977 | etc::test_file_change (int n) | |
3978 | { | |
3979 | NTSTATUS status; | |
3980 | FILE_NETWORK_OPEN_INFORMATION fnoi; | |
3981 | bool res; | |
3982 | ||
3983 | status = NtQueryFullAttributesFile (&fn[n], &fnoi); | |
3984 | if (!NT_SUCCESS (status)) | |
3985 | { | |
3986 | res = true; | |
3987 | memset (last_modified + n, 0, sizeof (last_modified[n])); | |
3988 | debug_printf ("NtQueryFullAttributesFile (%S) failed, %p", | |
3989 | fn[n].ObjectName, status); | |
3990 | } | |
3991 | else | |
3992 | { | |
3993 | res = CompareFileTime ((FILETIME *) &fnoi.LastWriteTime, | |
3994 | (FILETIME *) last_modified + n) > 0; | |
3995 | last_modified[n].QuadPart = fnoi.LastWriteTime.QuadPart; | |
3996 | } | |
3997 | ||
3998 | paranoid_printf ("fn[%d] %S res %d", n, fn[n].ObjectName, res); | |
3999 | return res; | |
4000 | } | |
4001 | ||
4002 | bool | |
4003 | etc::dir_changed (int n) | |
4004 | { | |
4005 | if (!change_possible[n]) | |
4006 | { | |
4007 | static HANDLE changed_h NO_COPY; | |
4008 | NTSTATUS status; | |
4009 | IO_STATUS_BLOCK io; | |
4010 | ||
4011 | if (!changed_h) | |
4012 | { | |
4013 | OBJECT_ATTRIBUTES attr; | |
4014 | ||
4015 | path_conv dir ("/etc"); | |
4016 | status = NtOpenFile (&changed_h, SYNCHRONIZE | FILE_LIST_DIRECTORY, | |
4017 | dir.get_object_attr (attr, sec_none_nih), &io, | |
4018 | FILE_SHARE_VALID_FLAGS, FILE_DIRECTORY_FILE); | |
4019 | if (!NT_SUCCESS (status)) | |
4020 | { | |
1b61bf15 | 4021 | #ifdef DEBUGGING |
1870c688 CV |
4022 | system_printf ("NtOpenFile (%S) failed, %p", |
4023 | dir.get_nt_native_path (), status); | |
1b61bf15 | 4024 | #endif |
1870c688 CV |
4025 | changed_h = INVALID_HANDLE_VALUE; |
4026 | } | |
4027 | else | |
4028 | { | |
4029 | status = NtNotifyChangeDirectoryFile (changed_h, NULL, NULL, | |
4030 | NULL, &io, NULL, 0, | |
4031 | FILE_NOTIFY_CHANGE_LAST_WRITE | |
4032 | | FILE_NOTIFY_CHANGE_FILE_NAME, | |
4033 | FALSE); | |
4034 | if (!NT_SUCCESS (status)) | |
4035 | { | |
7905c4f1 | 4036 | #ifdef DEBUGGING |
1870c688 CV |
4037 | system_printf ("NtNotifyChangeDirectoryFile (1) failed, %p", |
4038 | status); | |
7905c4f1 | 4039 | #endif |
1870c688 CV |
4040 | NtClose (changed_h); |
4041 | changed_h = INVALID_HANDLE_VALUE; | |
4042 | } | |
4043 | } | |
4044 | memset (change_possible, true, sizeof (change_possible)); | |
4045 | } | |
7905c4f1 | 4046 | |
1870c688 CV |
4047 | if (changed_h == INVALID_HANDLE_VALUE) |
4048 | change_possible[n] = true; | |
4049 | else if (WaitForSingleObject (changed_h, 0) == WAIT_OBJECT_0) | |
4050 | { | |
4051 | status = NtNotifyChangeDirectoryFile (changed_h, NULL, NULL, | |
4052 | NULL, &io, NULL, 0, | |
4053 | FILE_NOTIFY_CHANGE_LAST_WRITE | |
4054 | | FILE_NOTIFY_CHANGE_FILE_NAME, | |
4055 | FALSE); | |
4056 | if (!NT_SUCCESS (status)) | |
4057 | { | |
1b61bf15 | 4058 | #ifdef DEBUGGING |
1870c688 CV |
4059 | system_printf ("NtNotifyChangeDirectoryFile (2) failed, %p", |
4060 | status); | |
1b61bf15 | 4061 | #endif |
1870c688 CV |
4062 | NtClose (changed_h); |
4063 | changed_h = INVALID_HANDLE_VALUE; | |
4064 | } | |
4065 | memset (change_possible, true, sizeof change_possible); | |
4066 | } | |
4067 | } | |
81adfe28 | 4068 | |
1870c688 CV |
4069 | paranoid_printf ("fn[%d] %S change_possible %d", |
4070 | n, fn[n].ObjectName, change_possible[n]); | |
4071 | return change_possible[n]; | |
4072 | } | |
4073 | ||
4074 | bool | |
4075 | etc::file_changed (int n) | |
4076 | { | |
4077 | bool res = false; | |
4078 | if (dir_changed (n) && test_file_change (n)) | |
4079 | res = true; | |
4080 | change_possible[n] = false; /* Change is no longer possible */ | |
4081 | paranoid_printf ("fn[%d] %S res %d", n, fn[n].ObjectName, res); | |
4082 | return res; | |
4083 | } | |
4084 | ||
4085 | /* No need to be reentrant or thread-safe according to SUSv3. | |
4086 | / and \\ are treated equally. Leading drive specifiers are | |
4087 | kept intact as far as it makes sense. Everything else is | |
4088 | POSIX compatible. */ | |
4089 | extern "C" char * | |
4090 | basename (char *path) | |
4091 | { | |
4092 | static char buf[4]; | |
4093 | char *c, *d, *bs = path; | |
4094 | ||
4095 | if (!path || !*path) | |
4096 | return strcpy (buf, "."); | |
4097 | if (isalpha (path[0]) && path[1] == ':') | |
4098 | bs += 2; | |
4099 | else if (strspn (path, "/\\") > 1) | |
4100 | ++bs; | |
4101 | c = strrchr (bs, '/'); | |
4102 | if ((d = strrchr (c ?: bs, '\\')) > c) | |
4103 | c = d; | |
4104 | if (c) | |
4105 | { | |
4106 | /* Trailing (back)slashes are eliminated. */ | |
4107 | while (c && c > bs && c[1] == '\0') | |
4108 | { | |
4109 | *c = '\0'; | |
4110 | c = strrchr (bs, '/'); | |
4111 | if ((d = strrchr (c ?: bs, '\\')) > c) | |
4112 | c = d; | |
4113 | } | |
4114 | if (c && (c > bs || c[1])) | |
4115 | return c + 1; | |
4116 | } | |
4117 | else if (!bs[0]) | |
4118 | { | |
4119 | stpncpy (buf, path, bs - path); | |
4120 | stpcpy (buf + (bs - path), "."); | |
4121 | return buf; | |
4122 | } | |
4123 | return path; | |
4124 | } | |
4125 | ||
4126 | /* No need to be reentrant or thread-safe according to SUSv3. | |
4127 | / and \\ are treated equally. Leading drive specifiers and | |
4128 | leading double (back)slashes are kept intact as far as it | |
4129 | makes sense. Everything else is POSIX compatible. */ | |
4130 | extern "C" char * | |
4131 | dirname (char *path) | |
4132 | { | |
4133 | static char buf[4]; | |
4134 | char *c, *d, *bs = path; | |
4135 | ||
4136 | if (!path || !*path) | |
4137 | return strcpy (buf, "."); | |
4138 | if (isalpha (path[0]) && path[1] == ':') | |
4139 | bs += 2; | |
4140 | else if (strspn (path, "/\\") > 1) | |
4141 | ++bs; | |
4142 | c = strrchr (bs, '/'); | |
4143 | if ((d = strrchr (c ?: bs, '\\')) > c) | |
4144 | c = d; | |
4145 | if (c) | |
4146 | { | |
4147 | /* Trailing (back)slashes are eliminated. */ | |
4148 | while (c && c > bs && c[1] == '\0') | |
4149 | { | |
4150 | *c = '\0'; | |
4151 | c = strrchr (bs, '/'); | |
4152 | if ((d = strrchr (c ?: bs, '\\')) > c) | |
4153 | c = d; | |
4154 | } | |
4155 | if (!c) | |
4156 | strcpy (bs, "."); | |
4157 | else if (c > bs) | |
4158 | { | |
4159 | /* More trailing (back)slashes are eliminated. */ | |
4160 | while (c > bs && (*c == '/' || *c == '\\')) | |
4161 | *c-- = '\0'; | |
4162 | } | |
4163 | else | |
4164 | c[1] = '\0'; | |
4165 | } | |
4166 | else | |
4167 | { | |
4168 | stpncpy (buf, path, bs - path); | |
4169 | stpcpy (buf + (bs - path), "."); | |
4170 | return buf; | |
4171 | } | |
4172 | return path; | |
4173 | } |