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b168057a | 1 | /* Copyright (C) 1991-2015 Free Software Foundation, Inc. |
ebbad4cc | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
ebbad4cc | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 8 | |
ebbad4cc UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 17 | |
28f540f4 RM |
18 | #include <string.h> |
19 | #include <unistd.h> | |
20 | #include <hurd.h> | |
21 | #include <hurd/paths.h> | |
22 | #include <fcntl.h> | |
23 | ||
24 | /* Make a link to FROM called TO. */ | |
25 | int | |
bd2260a2 | 26 | __symlink (const char *from, const char *to) |
28f540f4 RM |
27 | { |
28 | error_t err; | |
29 | file_t dir, node; | |
30 | char *name; | |
31 | const size_t len = strlen (from) + 1; | |
32 | char buf[sizeof (_HURD_SYMLINK) + len]; | |
33 | ||
34 | /* A symlink is a file whose translator is "/hurd/symlink\0target\0". */ | |
35 | ||
36 | memcpy (buf, _HURD_SYMLINK, sizeof (_HURD_SYMLINK)); | |
37 | memcpy (&buf[sizeof (_HURD_SYMLINK)], from, len); | |
38 | ||
39 | dir = __file_name_split (to, &name); | |
40 | if (dir == MACH_PORT_NULL) | |
41 | return -1; | |
42 | ||
43 | /* Create a new, unlinked node in the target directory. */ | |
44 | err = __dir_mkfile (dir, O_WRITE, 0777 & ~_hurd_umask, &node); | |
45 | ||
46 | if (! err) | |
87ef29ca RM |
47 | { |
48 | /* Set the node's translator to make it a symlink. */ | |
49 | err = __file_set_translator (node, | |
50 | FS_TRANS_EXCL|FS_TRANS_SET, | |
51 | FS_TRANS_EXCL|FS_TRANS_SET, 0, | |
52 | buf, sizeof (_HURD_SYMLINK) + len, | |
53 | MACH_PORT_NULL, MACH_MSG_TYPE_COPY_SEND); | |
28f540f4 | 54 | |
87ef29ca RM |
55 | if (! err) |
56 | /* Link the node, now a valid symlink, into the target directory. */ | |
57 | err = __dir_link (dir, node, name, 1); | |
58 | ||
59 | __mach_port_deallocate (__mach_task_self (), node); | |
60 | } | |
28f540f4 RM |
61 | |
62 | __mach_port_deallocate (__mach_task_self (), dir); | |
28f540f4 RM |
63 | |
64 | if (err) | |
65 | return __hurd_fail (err); | |
66 | return 0; | |
67 | } | |
68 | ||
69 | weak_alias (__symlink, symlink) |