+/* File tree traversal functions.
+ Copyright (C) 1994-2022 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
/*-
* Copyright (c) 1990, 1993, 1994
* The Regents of the University of California. All rights reserved.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
#include <dirent.h>
#include <errno.h>
#include <fts.h>
+#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#endif
/* Align P to that size. */
#ifndef ALIGN
-#define ALIGN(p) (((unsigned long int) (p) + ALIGNBYTES) & ~ALIGNBYTES)
+#define ALIGN(p) (((uintptr_t) (p) + ALIGNBYTES) & ~ALIGNBYTES)
#endif
-static FTSENT *fts_alloc __P((FTS *, const char *, int)) internal_function;
-static FTSENT *fts_build __P((FTS *, int)) internal_function;
-static void fts_lfree __P((FTSENT *)) internal_function;
-static void fts_load __P((FTS *, FTSENT *));
-static size_t fts_maxarglen __P((char * const *)) internal_function;
-static void fts_padjust __P((FTS *, void *)) internal_function;
-static int fts_palloc __P((FTS *, size_t)) internal_function;
-static FTSENT *fts_sort __P((FTS *, FTSENT *, int)) internal_function;
-static u_short fts_stat __P((FTS *, struct dirent *, FTSENT *, int))
- internal_function;
+/* Support for the LFS API version. */
+#ifndef FTS_OPEN
+#define FTS_OPEN fts_open
+#define FTS_CLOSE fts_close
+#define FTS_READ fts_read
+#define FTS_SET fts_set
+#define FTS_CHILDREN fts_children
+# define FTSOBJ FTS
+# define FTSENTRY FTSENT
+# define INO_T ino_t
+# define STRUCT_STAT stat
+# define STAT __stat
+# define LSTAT __lstat
+#endif
+
+static FTSENTRY *fts_alloc (FTSOBJ *, const char *, size_t);
+static FTSENTRY *fts_build (FTSOBJ *, int);
+static void fts_lfree (FTSENTRY *);
+static void fts_load (FTSOBJ *, FTSENTRY *);
+static size_t fts_maxarglen (char * const *);
+static void fts_padjust (FTSOBJ *, FTSENTRY *);
+static int fts_palloc (FTSOBJ *, size_t);
+static FTSENTRY *fts_sort (FTSOBJ *, FTSENTRY *, int);
+static u_short fts_stat (FTSOBJ *, FTSENTRY *, int);
+static int fts_safe_changedir (FTSOBJ *, FTSENTRY *, int, const char *);
#ifndef MAX
#define MAX(a, b) ({ __typeof__ (a) _a = (a); \
#define ISDOT(a) (a[0] == '.' && (!a[1] || (a[1] == '.' && !a[2])))
-#define ISSET(opt) (sp->fts_options & opt)
-#define SET(opt) (sp->fts_options |= opt)
+#define CLR(opt) (sp->fts_options &= ~(opt))
+#define ISSET(opt) (sp->fts_options & (opt))
+#define SET(opt) (sp->fts_options |= (opt))
-#define CHDIR(sp, path) (!ISSET(FTS_NOCHDIR) && __chdir(path))
#define FCHDIR(sp, fd) (!ISSET(FTS_NOCHDIR) && __fchdir(fd))
/* fts_build flags */
#define BNAMES 2 /* fts_children, names only */
#define BREAD 3 /* fts_read */
-FTS *
-fts_open(argv, options, compar)
- char * const *argv;
- register int options;
- int (*compar) __P((const FTSENT **, const FTSENT **));
+FTSOBJ *
+FTS_OPEN (char * const *argv, int options,
+ int (*compar) (const FTSENTRY **, const FTSENTRY **))
{
- register FTS *sp;
- register FTSENT *p, *root;
- register int nitems;
- FTSENT *parent, *tmp;
- int len;
+ FTSOBJ *sp;
+ FTSENTRY *p, *root;
+ int nitems;
+ FTSENTRY *parent = NULL;
+ FTSENTRY *tmp;
/* Options check. */
if (options & ~FTS_OPTIONMASK) {
}
/* Allocate/initialize the stream */
- if ((sp = malloc((u_int)sizeof(FTS))) == NULL)
+ if ((sp = malloc((u_int)sizeof(FTSOBJ))) == NULL)
return (NULL);
- __bzero(sp, sizeof(FTS));
- sp->fts_compar = (int (*) __P((const void *, const void *))) compar;
+ memset(sp, 0, sizeof(FTSOBJ));
+ sp->fts_compar = (int (*) (const void *, const void *)) compar;
sp->fts_options = options;
/* Logical walks turn on NOCHDIR; symbolic links are too hard. */
#ifndef MAXPATHLEN
#define MAXPATHLEN 1024
#endif
- if (fts_palloc(sp, MAX(fts_maxarglen(argv), MAXPATHLEN)))
+ size_t maxarglen = fts_maxarglen(argv);
+ if (fts_palloc(sp, MAX(maxarglen, MAXPATHLEN)))
goto mem1;
/* Allocate/initialize root's parent. */
- if ((parent = fts_alloc(sp, "", 0)) == NULL)
- goto mem2;
- parent->fts_level = FTS_ROOTPARENTLEVEL;
+ if (*argv != NULL) {
+ if ((parent = fts_alloc(sp, "", 0)) == NULL)
+ goto mem2;
+ parent->fts_level = FTS_ROOTPARENTLEVEL;
+ }
/* Allocate/initialize root(s). */
- for (root = NULL, nitems = 0; *argv; ++argv, ++nitems) {
+ for (root = NULL, nitems = 0; *argv != NULL; ++argv, ++nitems) {
/* Don't allow zero-length paths. */
- if ((len = strlen(*argv)) == 0) {
+ size_t len = strlen(*argv);
+ if (len == 0) {
__set_errno (ENOENT);
goto mem3;
}
p->fts_level = FTS_ROOTLEVEL;
p->fts_parent = parent;
p->fts_accpath = p->fts_name;
- p->fts_info = fts_stat(sp, NULL, p, ISSET(FTS_COMFOLLOW));
+ p->fts_info = fts_stat(sp, p, ISSET(FTS_COMFOLLOW));
/* Command-line "." and ".." are real directories. */
if (p->fts_info == FTS_DOT)
sp->fts_cur->fts_info = FTS_INIT;
/*
- * If using chdir(2), grab a file descriptor pointing to dot to insure
+ * If using chdir(2), grab a file descriptor pointing to dot to ensure
* that we can get back here; this could be avoided for some paths,
* but almost certainly not worth the effort. Slashes, symbolic links,
* and ".." are all fairly nasty problems. Note, if we can't get the
}
static void
-fts_load(sp, p)
- FTS *sp;
- register FTSENT *p;
+fts_load (FTSOBJ *sp, FTSENTRY *p)
{
- register int len;
- register char *cp;
+ int len;
+ char *cp;
/*
* Load the stream structure for the next traversal. Since we don't
* known that the path will fit.
*/
len = p->fts_pathlen = p->fts_namelen;
- bcopy(p->fts_name, sp->fts_path, len + 1);
- if ((cp = rindex(p->fts_name, '/')) && (cp != p->fts_name || cp[1])) {
+ memmove(sp->fts_path, p->fts_name, len + 1);
+ if ((cp = strrchr(p->fts_name, '/')) && (cp != p->fts_name || cp[1])) {
len = strlen(++cp);
- bcopy(cp, p->fts_name, len + 1);
+ memmove(p->fts_name, cp, len + 1);
p->fts_namelen = len;
}
p->fts_accpath = p->fts_path = sp->fts_path;
}
int
-fts_close(sp)
- FTS *sp;
+FTS_CLOSE (FTSOBJ *sp)
{
- register FTSENT *freep, *p;
+ FTSENTRY *freep, *p;
int saved_errno;
- int retval = 0;
/*
* This still works if we haven't read anything -- the dummy structure
if (sp->fts_cur) {
for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) {
freep = p;
- p = p->fts_link ? p->fts_link : p->fts_parent;
+ p = p->fts_link != NULL ? p->fts_link : p->fts_parent;
free(freep);
}
free(p);
/* Free up child linked list, sort array, path buffer. */
if (sp->fts_child)
fts_lfree(sp->fts_child);
- if (sp->fts_array)
- free(sp->fts_array);
+ free(sp->fts_array);
free(sp->fts_path);
/* Return to original directory, save errno if necessary. */
if (!ISSET(FTS_NOCHDIR)) {
saved_errno = __fchdir(sp->fts_rfd) ? errno : 0;
(void)__close(sp->fts_rfd);
- }
- /* Set errno and return. */
- if (!ISSET(FTS_NOCHDIR) && saved_errno) {
- __set_errno (saved_errno);
- retval = -1;
+ /* Set errno and return. */
+ if (saved_errno != 0) {
+ /* Free up the stream pointer. */
+ free(sp);
+ __set_errno (saved_errno);
+ return (-1);
+ }
}
/* Free up the stream pointer. */
- free (sp);
-
- return retval;
+ free(sp);
+ return (0);
}
/*
- * Special case a root of "/" so that slashes aren't appended which would
- * cause paths to be written as "//foo".
+ * Special case of "/" at the end of the path so that slashes aren't
+ * appended which would cause paths to be written as "....//foo".
*/
#define NAPPEND(p) \
- (p->fts_level == FTS_ROOTLEVEL && p->fts_pathlen == 1 && \
- p->fts_path[0] == '/' ? 0 : p->fts_pathlen)
+ (p->fts_path[p->fts_pathlen - 1] == '/' \
+ ? p->fts_pathlen - 1 : p->fts_pathlen)
-FTSENT *
-fts_read(sp)
- register FTS *sp;
+FTSENTRY *
+FTS_READ (FTSOBJ *sp)
{
- register FTSENT *p, *tmp;
- register int instr;
- register char *t;
+ FTSENTRY *p, *tmp;
+ int instr;
+ char *t;
int saved_errno;
/* If finished or unrecoverable error, return NULL. */
/* Any type of file may be re-visited; re-stat and re-turn. */
if (instr == FTS_AGAIN) {
- p->fts_info = fts_stat(sp, NULL, p, 0);
+ p->fts_info = fts_stat(sp, p, 0);
return (p);
}
*/
if (instr == FTS_FOLLOW &&
(p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE)) {
- p->fts_info = fts_stat(sp, NULL, p, 1);
+ p->fts_info = fts_stat(sp, p, 1);
if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) {
if ((p->fts_symfd = __open(".", O_RDONLY, 0)) < 0) {
p->fts_errno = errno;
}
/* Rebuild if only read the names and now traversing. */
- if (sp->fts_child && sp->fts_options & FTS_NAMEONLY) {
- sp->fts_options &= ~FTS_NAMEONLY;
+ if (sp->fts_child != NULL && ISSET(FTS_NAMEONLY)) {
+ CLR(FTS_NAMEONLY);
fts_lfree(sp->fts_child);
sp->fts_child = NULL;
}
* If haven't read do so. If the read fails, fts_build sets
* FTS_STOP or the fts_info field of the node.
*/
- if (sp->fts_child) {
- if (CHDIR(sp, p->fts_accpath)) {
+ if (sp->fts_child != NULL) {
+ if (fts_safe_changedir(sp, p, -1, p->fts_accpath)) {
p->fts_errno = errno;
p->fts_flags |= FTS_DONTCHDIR;
- for (p = sp->fts_child; p; p = p->fts_link)
+ for (p = sp->fts_child; p != NULL;
+ p = p->fts_link)
p->fts_accpath =
p->fts_parent->fts_accpath;
}
}
p = sp->fts_child;
sp->fts_child = NULL;
+ sp->fts_cur = p;
goto name;
}
/* Move to the next node on this level. */
next: tmp = p;
- if ((p = p->fts_link)) {
+ if ((p = p->fts_link) != NULL) {
+ sp->fts_cur = p;
free(tmp);
/*
- * If reached the top, return to the original directory, and
- * load the paths for the next root.
+ * If reached the top, return to the original directory (or
+ * the root of the tree), and load the paths for the next root.
*/
if (p->fts_level == FTS_ROOTLEVEL) {
- if (!ISSET(FTS_NOCHDIR) && FCHDIR(sp, sp->fts_rfd)) {
+ if (FCHDIR(sp, sp->fts_rfd)) {
SET(FTS_STOP);
return (NULL);
}
fts_load(sp, p);
- return (sp->fts_cur = p);
+ return p;
}
/*
if (p->fts_instr == FTS_SKIP)
goto next;
if (p->fts_instr == FTS_FOLLOW) {
- p->fts_info = fts_stat(sp, NULL, p, 1);
+ p->fts_info = fts_stat(sp, p, 1);
if (p->fts_info == FTS_D && !ISSET(FTS_NOCHDIR)) {
if ((p->fts_symfd =
__open(".", O_RDONLY, 0)) < 0) {
name: t = sp->fts_path + NAPPEND(p->fts_parent);
*t++ = '/';
- bcopy(p->fts_name, t, p->fts_namelen + 1);
- return (sp->fts_cur = p);
+ memmove(t, p->fts_name, p->fts_namelen + 1);
+ return p;
}
/* Move up to the parent node. */
p = tmp->fts_parent;
+ sp->fts_cur = p;
free(tmp);
if (p->fts_level == FTS_ROOTPARENTLEVEL) {
return (sp->fts_cur = NULL);
}
- /* Nul terminate the pathname. */
+ /* NUL terminate the pathname. */
sp->fts_path[p->fts_pathlen] = '\0';
/*
* one directory.
*/
if (p->fts_level == FTS_ROOTLEVEL) {
- if (!ISSET(FTS_NOCHDIR) && FCHDIR(sp, sp->fts_rfd)) {
+ if (FCHDIR(sp, sp->fts_rfd)) {
SET(FTS_STOP);
return (NULL);
}
return (NULL);
}
(void)__close(p->fts_symfd);
- } else if (!(p->fts_flags & FTS_DONTCHDIR)) {
- if (CHDIR(sp, "..")) {
- SET(FTS_STOP);
- return (NULL);
- }
+ } else if (!(p->fts_flags & FTS_DONTCHDIR) &&
+ fts_safe_changedir(sp, p->fts_parent, -1, "..")) {
+ SET(FTS_STOP);
+ return (NULL);
}
p->fts_info = p->fts_errno ? FTS_ERR : FTS_DP;
- return (sp->fts_cur = p);
+ return p;
}
/*
*/
/* ARGSUSED */
int
-fts_set(sp, p, instr)
- FTS *sp;
- FTSENT *p;
- int instr;
+FTS_SET (FTSOBJ *sp, FTSENTRY *p, int instr)
{
- if (instr && instr != FTS_AGAIN && instr != FTS_FOLLOW &&
+ if (instr != 0 && instr != FTS_AGAIN && instr != FTS_FOLLOW &&
instr != FTS_NOINSTR && instr != FTS_SKIP) {
__set_errno (EINVAL);
return (1);
return (0);
}
-FTSENT *
-fts_children(sp, instr)
- register FTS *sp;
- int instr;
+FTSENTRY *
+FTS_CHILDREN(FTSOBJ *sp, int instr)
{
- register FTSENT *p;
+ FTSENTRY *p;
int fd;
- if (instr && instr != FTS_NAMEONLY) {
+ if (instr != 0 && instr != FTS_NAMEONLY) {
__set_errno (EINVAL);
return (NULL);
}
return (NULL);
/* Free up any previous child list. */
- if (sp->fts_child)
+ if (sp->fts_child != NULL)
fts_lfree(sp->fts_child);
if (instr == FTS_NAMEONLY) {
- sp->fts_options |= FTS_NAMEONLY;
+ SET(FTS_NAMEONLY);
instr = BNAMES;
} else
instr = BCHILD;
return (sp->fts_child);
}
+static inline int
+dirent_not_directory(const struct dirent *dp)
+{
+#if defined DT_DIR && defined _DIRENT_HAVE_D_TYPE
+ return dp->d_type != DT_DIR && dp->d_type != DT_UNKNOWN;
+#else
+ return 0;
+#endif
+}
+
/*
* This is the tricky part -- do not casually change *anything* in here. The
* idea is to build the linked list of entries that are used by fts_children
* directories and for any files after the subdirectories in the directory have
* been found, cutting the stat calls by about 2/3.
*/
-static FTSENT *
-internal_function
-fts_build(sp, type)
- register FTS *sp;
- int type;
+static FTSENTRY *
+fts_build (FTSOBJ *sp, int type)
{
struct dirent *dp;
- register FTSENT *p, *head;
- register int nitems;
- FTSENT *cur, *tail;
+ FTSENTRY *p, *head;
+ int nitems;
+ FTSENTRY *cur, *tail;
DIR *dirp;
- void *adjaddr;
- int cderrno, descend, len, level, maxlen, nlinks, saved_errno;
+ void *oldaddr;
+ int cderrno, descend, len, level, nlinks, saved_errno,
+ nostat, doadjust;
+ size_t maxlen;
char *cp;
-#ifdef DTF_HIDEW
- int oflag;
-#endif
/* Set current node pointer. */
cur = sp->fts_cur;
* Open the directory for reading. If this fails, we're done.
* If being called from fts_read, set the fts_info field.
*/
-#ifdef DTF_HIDEW
- if (ISSET (FTS_WHITEOUT))
+#if defined FTS_WHITEOUT && 0
+ if (ISSET(FTS_WHITEOUT))
oflag = DTF_NODUP|DTF_REWIND;
else
oflag = DTF_HIDEW|DTF_NODUP|DTF_REWIND;
#else
# define __opendir2(path, flag) __opendir(path)
#endif
- if ((dirp = __opendir2 (cur->fts_accpath, oflag)) == NULL) {
+ if ((dirp = __opendir2(cur->fts_accpath, oflag)) == NULL) {
if (type == BREAD) {
cur->fts_info = FTS_DNR;
cur->fts_errno = errno;
* directory if we're cheating on stat calls, 0 if we're not doing
* any stat calls at all, -1 if we're doing stats on everything.
*/
- if (type == BNAMES)
+ if (type == BNAMES) {
nlinks = 0;
- else if (ISSET(FTS_NOSTAT) && ISSET(FTS_PHYSICAL))
+ /* Be quiet about nostat, GCC. */
+ nostat = 0;
+ } else if (ISSET(FTS_NOSTAT) && ISSET(FTS_PHYSICAL)) {
nlinks = cur->fts_nlink - (ISSET(FTS_SEEDOT) ? 0 : 2);
- else
+ nostat = 1;
+ } else {
nlinks = -1;
+ nostat = 0;
+ }
#ifdef notdef
(void)printf("nlinks == %d (cur: %d)\n", nlinks, cur->fts_nlink);
*/
cderrno = 0;
if (nlinks || type == BREAD) {
- if (FCHDIR(sp, dirfd(dirp))) {
+ if (fts_safe_changedir(sp, cur, dirfd(dirp), NULL)) {
if (nlinks && type == BREAD)
cur->fts_errno = errno;
cur->fts_flags |= FTS_DONTCHDIR;
descend = 0;
cderrno = errno;
+ (void)__closedir(dirp);
+ dirp = NULL;
} else
descend = 1;
} else
* If not changing directories set a pointer so that can just append
* each new name into the path.
*/
- maxlen = sp->fts_pathlen - cur->fts_pathlen - 1;
len = NAPPEND(cur);
if (ISSET(FTS_NOCHDIR)) {
cp = sp->fts_path + len;
*cp++ = '/';
+ } else {
+ /* GCC, you're too verbose. */
+ cp = NULL;
}
+ len++;
+ maxlen = sp->fts_pathlen - len;
level = cur->fts_level + 1;
/* Read the directory, attaching each entry to the `link' pointer. */
- adjaddr = NULL;
- head = tail = NULL;
- nitems = 0;
- while((dp = __readdir(dirp))) {
- int namlen;
-
+ doadjust = 0;
+ for (head = tail = NULL, nitems = 0; dirp && (dp = __readdir(dirp));) {
if (!ISSET(FTS_SEEDOT) && ISDOT(dp->d_name))
continue;
- namlen = _D_EXACT_NAMLEN (dp);
- if ((p = fts_alloc(sp, dp->d_name, namlen)) == NULL)
+ if ((p = fts_alloc(sp, dp->d_name, _D_EXACT_NAMLEN (dp))) == NULL)
goto mem1;
- if (namlen > maxlen) {
- if (fts_palloc(sp, (size_t)namlen)) {
+ if (_D_EXACT_NAMLEN (dp) >= maxlen) {/* include space for NUL */
+ oldaddr = sp->fts_path;
+ if (fts_palloc(sp, _D_EXACT_NAMLEN (dp) + len + 1)) {
/*
* No more memory for path or structures. Save
* errno, free up the current structure and the
* structures already allocated.
*/
mem1: saved_errno = errno;
- if (p)
- free(p);
+ free(p);
fts_lfree(head);
(void)__closedir(dirp);
- __set_errno (saved_errno);
cur->fts_info = FTS_ERR;
SET(FTS_STOP);
+ __set_errno (saved_errno);
return (NULL);
}
- adjaddr = sp->fts_path;
- maxlen = sp->fts_pathlen - sp->fts_cur->fts_pathlen - 1;
+ /* Did realloc() change the pointer? */
+ if (oldaddr != sp->fts_path) {
+ doadjust = 1;
+ if (ISSET(FTS_NOCHDIR))
+ cp = sp->fts_path + len;
+ }
+ maxlen = sp->fts_pathlen - len;
}
- p->fts_pathlen = len + namlen + 1;
- p->fts_parent = sp->fts_cur;
+ if (len + _D_EXACT_NAMLEN (dp) >= USHRT_MAX) {
+ /*
+ * In an FTSENT, fts_pathlen is a u_short so it is
+ * possible to wraparound here. If we do, free up
+ * the current structure and the structures already
+ * allocated, then error out with ENAMETOOLONG.
+ */
+ free(p);
+ fts_lfree(head);
+ (void)__closedir(dirp);
+ cur->fts_info = FTS_ERR;
+ SET(FTS_STOP);
+ __set_errno (ENAMETOOLONG);
+ return (NULL);
+ }
p->fts_level = level;
+ p->fts_parent = sp->fts_cur;
+ p->fts_pathlen = len + _D_EXACT_NAMLEN (dp);
- if (cderrno) {
+#if defined FTS_WHITEOUT && 0
+ if (dp->d_type == DT_WHT)
+ p->fts_flags |= FTS_ISW;
+#endif
+
+ /* Unreachable code. cderrno is only ever set to a nonnull
+ value if dirp is closed at the same time. But then we
+ cannot enter this loop. */
+ if (0 && cderrno) {
if (nlinks) {
p->fts_info = FTS_NS;
p->fts_errno = cderrno;
p->fts_info = FTS_NSOK;
p->fts_accpath = cur->fts_accpath;
} else if (nlinks == 0
-#if defined DT_DIR && defined _DIRENT_HAVE_D_TYPE
- || (nlinks > 0 &&
- dp->d_type != DT_DIR && dp->d_type != DT_UNKNOWN)
-#endif
- ) {
+ || (nostat && dirent_not_directory(dp))) {
p->fts_accpath =
ISSET(FTS_NOCHDIR) ? p->fts_path : p->fts_name;
p->fts_info = FTS_NSOK;
/* Build a file name for fts_stat to stat. */
if (ISSET(FTS_NOCHDIR)) {
p->fts_accpath = p->fts_path;
- bcopy(p->fts_name, cp, p->fts_namelen + 1);
+ memmove(cp, p->fts_name, p->fts_namelen + 1);
} else
p->fts_accpath = p->fts_name;
/* Stat it. */
- p->fts_info = fts_stat(sp, dp, p, 0);
+ p->fts_info = fts_stat(sp, p, 0);
/* Decrement link count if applicable. */
if (nlinks > 0 && (p->fts_info == FTS_D ||
}
++nitems;
}
- (void)__closedir(dirp);
+ if (dirp)
+ (void)__closedir(dirp);
/*
- * If had to realloc the path, adjust the addresses for the rest
- * of the tree.
+ * If realloc() changed the address of the path, adjust the
+ * addresses for the rest of the tree and the dir list.
*/
- if (adjaddr)
- fts_padjust(sp, adjaddr);
+ if (doadjust)
+ fts_padjust(sp, head);
/*
* If not changing directories, reset the path back to original
* state.
*/
if (ISSET(FTS_NOCHDIR)) {
- if (cp - 1 > sp->fts_path)
+ if (len == sp->fts_pathlen || nitems == 0)
--cp;
*cp = '\0';
}
*/
if (descend && (type == BCHILD || !nitems) &&
(cur->fts_level == FTS_ROOTLEVEL ?
- FCHDIR (sp, sp->fts_rfd) : CHDIR (sp, ".."))) {
+ FCHDIR(sp, sp->fts_rfd) :
+ fts_safe_changedir(sp, cur->fts_parent, -1, ".."))) {
cur->fts_info = FTS_ERR;
SET(FTS_STOP);
+ fts_lfree(head);
return (NULL);
}
if (!nitems) {
if (type == BREAD)
cur->fts_info = FTS_DP;
+ fts_lfree(head);
return (NULL);
}
}
static u_short
-internal_function
-fts_stat(sp, dp, p, follow)
- FTS *sp;
- register FTSENT *p;
- struct dirent *dp;
- int follow;
+fts_stat (FTSOBJ *sp, FTSENTRY *p, int follow)
{
- register FTSENT *t;
- register dev_t dev;
- register ino_t ino;
- struct stat *sbp, sb;
+ FTSENTRY *t;
+ dev_t dev;
+ INO_T ino;
+ struct STRUCT_STAT *sbp, sb;
int saved_errno;
/* If user needs stat info, stat buffer already allocated. */
sbp = ISSET(FTS_NOSTAT) ? &sb : p->fts_statp;
-#ifdef DT_WHT
- /*
- * Whited-out files don't really exist. However, there's stat(2) file
- * mask for them, so we set it so that programs (i.e., find) don't have
- * to test FTS_W separately from other file types.
- */
- if (dp != NULL && dp->d_type == DT_WHT) {
- memset(sbp, 0, sizeof(struct stat));
- sbp->st_mode = S_IFWHT;
+#if defined FTS_WHITEOUT && 0
+ /* check for whiteout */
+ if (p->fts_flags & FTS_ISW) {
+ if (sbp != &sb) {
+ memset(sbp, '\0', sizeof (*sbp));
+ sbp->st_mode = S_IFWHT;
+ }
return (FTS_W);
}
#endif
* fail, set the errno from the stat call.
*/
if (ISSET(FTS_LOGICAL) || follow) {
- if (stat(p->fts_accpath, sbp)) {
+ if (STAT(p->fts_accpath, sbp)) {
saved_errno = errno;
- if (!lstat(p->fts_accpath, sbp)) {
+ if (!LSTAT(p->fts_accpath, sbp)) {
__set_errno (0);
return (FTS_SLNONE);
}
p->fts_errno = saved_errno;
goto err;
}
- } else if (lstat(p->fts_accpath, sbp)) {
+ } else if (LSTAT(p->fts_accpath, sbp)) {
p->fts_errno = errno;
-err: __bzero(sbp, sizeof(struct stat));
+err: memset(sbp, 0, sizeof(struct STRUCT_STAT));
return (FTS_NS);
}
return (FTS_DEFAULT);
}
-static FTSENT *
-internal_function
-fts_sort(sp, head, nitems)
- FTS *sp;
- FTSENT *head;
- register int nitems;
+static FTSENTRY *
+fts_sort (FTSOBJ *sp, FTSENTRY *head, int nitems)
{
- register FTSENT **ap, *p;
+ FTSENTRY **ap, *p;
/*
* Construct an array of pointers to the structures and call qsort(3).
* 40 so don't realloc one entry at a time.
*/
if (nitems > sp->fts_nitems) {
+ FTSENTRY **a;
+
sp->fts_nitems = nitems + 40;
- if ((sp->fts_array = realloc(sp->fts_array,
- (size_t)(sp->fts_nitems * sizeof(FTSENT *)))) == NULL) {
+ if ((a = realloc(sp->fts_array,
+ (size_t)(sp->fts_nitems * sizeof(FTSENTRY *)))) == NULL) {
+ free(sp->fts_array);
+ sp->fts_array = NULL;
sp->fts_nitems = 0;
return (head);
}
+ sp->fts_array = a;
}
for (ap = sp->fts_array, p = head; p; p = p->fts_link)
*ap++ = p;
- qsort((void *)sp->fts_array, nitems, sizeof(FTSENT *), sp->fts_compar);
+ qsort((void *)sp->fts_array, nitems, sizeof(FTSENTRY *), sp->fts_compar);
for (head = *(ap = sp->fts_array); --nitems; ++ap)
ap[0]->fts_link = ap[1];
ap[0]->fts_link = NULL;
return (head);
}
-static FTSENT *
-internal_function
-fts_alloc(sp, name, namelen)
- FTS *sp;
- const char *name;
- register int namelen;
+static FTSENTRY *
+fts_alloc (FTSOBJ *sp, const char *name, size_t namelen)
{
- register FTSENT *p;
+ FTSENTRY *p;
size_t len;
/*
* fts_name field is declared to be of size 1, the fts_name pointer is
* namelen + 2 before the first possible address of the stat structure.
*/
- len = sizeof(FTSENT) + namelen;
+ len = sizeof(FTSENTRY) + namelen;
if (!ISSET(FTS_NOSTAT))
- len += sizeof(struct stat) + ALIGNBYTES;
+ len += sizeof(struct STRUCT_STAT) + ALIGNBYTES;
if ((p = malloc(len)) == NULL)
return (NULL);
- /* Copy the name plus the trailing NULL. */
- bcopy(name, p->fts_name, namelen + 1);
+ /* Copy the name and guarantee NUL termination. */
+ memmove(p->fts_name, name, namelen);
+ p->fts_name[namelen] = '\0';
if (!ISSET(FTS_NOSTAT))
- p->fts_statp = (struct stat *)ALIGN(p->fts_name + namelen + 2);
+ p->fts_statp = (struct STRUCT_STAT *)ALIGN(p->fts_name + namelen + 2);
p->fts_namelen = namelen;
p->fts_path = sp->fts_path;
p->fts_errno = 0;
}
static void
-internal_function
-fts_lfree(head)
- register FTSENT *head;
+fts_lfree (FTSENTRY *head)
{
- register FTSENT *p;
+ FTSENTRY *p;
/* Free a linked list of structures. */
while ((p = head)) {
* plus 256 bytes so don't realloc the path 2 bytes at a time.
*/
static int
-internal_function
-fts_palloc(sp, more)
- FTS *sp;
- size_t more;
+fts_palloc (FTSOBJ *sp, size_t more)
{
+ char *p;
+
sp->fts_pathlen += more + 256;
- sp->fts_path = realloc(sp->fts_path, (size_t)sp->fts_pathlen);
- return (sp->fts_path == NULL);
+ /*
+ * Check for possible wraparound. In an FTS, fts_pathlen is
+ * a signed int but in an FTSENT it is an unsigned short.
+ * We limit fts_pathlen to USHRT_MAX to be safe in both cases.
+ */
+ if (sp->fts_pathlen < 0 || sp->fts_pathlen >= USHRT_MAX) {
+ free(sp->fts_path);
+ sp->fts_path = NULL;
+ __set_errno (ENAMETOOLONG);
+ return (1);
+ }
+ p = realloc(sp->fts_path, sp->fts_pathlen);
+ if (p == NULL) {
+ free(sp->fts_path);
+ sp->fts_path = NULL;
+ return 1;
+ }
+ sp->fts_path = p;
+ return 0;
}
/*
* already returned.
*/
static void
-internal_function
-fts_padjust(sp, addr)
- FTS *sp;
- void *addr;
+fts_padjust (FTSOBJ *sp, FTSENTRY *head)
{
- FTSENT *p;
-
-#define ADJUST(p) { \
- (p)->fts_accpath = \
- (char *)addr + ((p)->fts_accpath - (p)->fts_path); \
+ FTSENTRY *p;
+ char *addr = sp->fts_path;
+
+#define ADJUST(p) do { \
+ if ((p)->fts_accpath != (p)->fts_name) { \
+ (p)->fts_accpath = \
+ (char *)addr + ((p)->fts_accpath - (p)->fts_path); \
+ } \
(p)->fts_path = addr; \
-}
+} while (0)
/* Adjust the current set of children. */
for (p = sp->fts_child; p; p = p->fts_link)
ADJUST(p);
- /* Adjust the rest of the tree. */
- for (p = sp->fts_cur; p->fts_level >= FTS_ROOTLEVEL;) {
+ /* Adjust the rest of the tree, including the current level. */
+ for (p = head; p->fts_level >= FTS_ROOTLEVEL;) {
ADJUST(p);
p = p->fts_link ? p->fts_link : p->fts_parent;
}
}
static size_t
-internal_function
-fts_maxarglen(argv)
- char * const *argv;
+fts_maxarglen (char * const *argv)
{
size_t len, max;
for (max = 0; *argv; ++argv)
if ((len = strlen(*argv)) > max)
max = len;
- return (max);
+ return (max + 1);
+}
+
+/*
+ * Change to dir specified by fd or p->fts_accpath without getting
+ * tricked by someone changing the world out from underneath us.
+ * Assumes p->fts_dev and p->fts_ino are filled in.
+ */
+static int
+fts_safe_changedir (FTSOBJ *sp, FTSENTRY *p, int fd, const char *path)
+{
+ int ret, oerrno, newfd;
+ struct stat64 sb;
+
+ newfd = fd;
+ if (ISSET(FTS_NOCHDIR))
+ return (0);
+ if (fd < 0 && (newfd = __open(path, O_RDONLY, 0)) < 0)
+ return (-1);
+ if (__fstat64(newfd, &sb)) {
+ ret = -1;
+ goto bail;
+ }
+ if (p->fts_dev != sb.st_dev || p->fts_ino != sb.st_ino) {
+ __set_errno (ENOENT); /* disinformation */
+ ret = -1;
+ goto bail;
+ }
+ ret = __fchdir(newfd);
+bail:
+ oerrno = errno;
+ if (fd < 0)
+ (void)__close(newfd);
+ __set_errno (oerrno);
+ return (ret);
}
git://sourceware.org / glibc.git / blobdiff