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-rw-r--r--lib/canonicalize.c307
1 files changed, 0 insertions, 307 deletions
diff --git a/lib/canonicalize.c b/lib/canonicalize.c
deleted file mode 100644
index 84368a493..000000000
--- a/lib/canonicalize.c
+++ /dev/null
@@ -1,307 +0,0 @@
-/* Return the canonical absolute name of a given file.
- Copyright (C) 1996-2005 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This program 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; see the file COPYING.
- If not, write to the Free Software Foundation,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include "canonicalize.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-#if HAVE_SYS_PARAM_H
-# include <sys/param.h>
-#endif
-
-#include <sys/stat.h>
-
-#include <unistd.h>
-
-#include <errno.h>
-#include <stddef.h>
-
-#include "cycle-check.h"
-#include "filenamecat.h"
-#include "stat-macros.h"
-#include "xalloc.h"
-#include "xgetcwd.h"
-
-#ifndef __set_errno
-# define __set_errno(Val) errno = (Val)
-#endif
-
-#include "pathmax.h"
-#include "xreadlink.h"
-
-#if !HAVE_CANONICALIZE_FILE_NAME
-/* Return the canonical absolute name of file NAME. A canonical name
- does not contain any `.', `..' components nor any repeated file name
- separators ('/') or symlinks. All components must exist.
- The result is malloc'd. */
-
-char *
-canonicalize_file_name (const char *name)
-{
-# if HAVE_RESOLVEPATH
-
- char *resolved, *extra_buf = NULL;
- size_t resolved_size;
- ssize_t resolved_len;
-
- if (name == NULL)
- {
- __set_errno (EINVAL);
- return NULL;
- }
-
- if (name[0] == '\0')
- {
- __set_errno (ENOENT);
- return NULL;
- }
-
- /* All known hosts with resolvepath (e.g. Solaris 7) don't turn
- relative names into absolute ones, so prepend the working
- directory if the file name is not absolute. */
- if (name[0] != '/')
- {
- char *wd;
-
- if (!(wd = xgetcwd ()))
- return NULL;
-
- extra_buf = file_name_concat (wd, name, NULL);
- name = extra_buf;
- free (wd);
- }
-
- resolved_size = strlen (name);
- while (1)
- {
- resolved_size = 2 * resolved_size + 1;
- resolved = xmalloc (resolved_size);
- resolved_len = resolvepath (name, resolved, resolved_size);
- if (resolved_len < 0)
- {
- free (resolved);
- free (extra_buf);
- return NULL;
- }
- if (resolved_len < resolved_size)
- break;
- free (resolved);
- }
-
- free (extra_buf);
-
- /* NUL-terminate the resulting name. */
- resolved[resolved_len] = '\0';
-
- return resolved;
-
-# else
-
- return canonicalize_filename_mode (name, CAN_EXISTING);
-
-# endif /* !HAVE_RESOLVEPATH */
-}
-#endif /* !HAVE_CANONICALIZE_FILE_NAME */
-
-/* Return the canonical absolute name of file NAME. A canonical name
- does not contain any `.', `..' components nor any repeated file name
- separators ('/') or symlinks. Whether components must exist
- or not depends on canonicalize mode. The result is malloc'd. */
-
-char *
-canonicalize_filename_mode (const char *name, canonicalize_mode_t can_mode)
-{
- char *rname, *dest, *extra_buf = NULL;
- char const *start;
- char const *end;
- char const *rname_limit;
- size_t extra_len = 0;
- struct cycle_check_state cycle_state;
-
- if (name == NULL)
- {
- __set_errno (EINVAL);
- return NULL;
- }
-
- if (name[0] == '\0')
- {
- __set_errno (ENOENT);
- return NULL;
- }
-
- if (name[0] != '/')
- {
- rname = xgetcwd ();
- if (!rname)
- return NULL;
- dest = strchr (rname, '\0');
- if (dest - rname < PATH_MAX)
- {
- char *p = xrealloc (rname, PATH_MAX);
- dest = p + (dest - rname);
- rname = p;
- rname_limit = rname + PATH_MAX;
- }
- else
- {
- rname_limit = dest;
- }
- }
- else
- {
- rname = xmalloc (PATH_MAX);
- rname_limit = rname + PATH_MAX;
- rname[0] = '/';
- dest = rname + 1;
- }
-
- cycle_check_init (&cycle_state);
- for (start = end = name; *start; start = end)
- {
- /* Skip sequence of multiple file name separators. */
- while (*start == '/')
- ++start;
-
- /* Find end of component. */
- for (end = start; *end && *end != '/'; ++end)
- /* Nothing. */;
-
- if (end - start == 0)
- break;
- else if (end - start == 1 && start[0] == '.')
- /* nothing */;
- else if (end - start == 2 && start[0] == '.' && start[1] == '.')
- {
- /* Back up to previous component, ignore if at root already. */
- if (dest > rname + 1)
- while ((--dest)[-1] != '/');
- }
- else
- {
- struct stat st;
-
- if (dest[-1] != '/')
- *dest++ = '/';
-
- if (dest + (end - start) >= rname_limit)
- {
- ptrdiff_t dest_offset = dest - rname;
- size_t new_size = rname_limit - rname;
-
- if (end - start + 1 > PATH_MAX)
- new_size += end - start + 1;
- else
- new_size += PATH_MAX;
- rname = xrealloc (rname, new_size);
- rname_limit = rname + new_size;
-
- dest = rname + dest_offset;
- }
-
- dest = memcpy (dest, start, end - start);
- dest += end - start;
- *dest = '\0';
-
- if (lstat (rname, &st) != 0)
- {
- if (can_mode == CAN_EXISTING)
- goto error;
- if (can_mode == CAN_ALL_BUT_LAST && *end)
- goto error;
- st.st_mode = 0;
- }
-
- if (S_ISLNK (st.st_mode))
- {
- char *buf;
- size_t n, len;
-
- if (cycle_check (&cycle_state, &st))
- {
- __set_errno (ELOOP);
- if (can_mode == CAN_MISSING)
- continue;
- else
- goto error;
- }
-
- buf = xreadlink (rname, st.st_size);
- if (!buf)
- {
- if (can_mode == CAN_MISSING)
- continue;
- else
- goto error;
- }
-
- n = strlen (buf);
- len = strlen (end);
-
- if (!extra_len)
- {
- extra_len =
- ((n + len + 1) > PATH_MAX) ? (n + len + 1) : PATH_MAX;
- extra_buf = xmalloc (extra_len);
- }
- else if ((n + len + 1) > extra_len)
- {
- extra_len = n + len + 1;
- extra_buf = xrealloc (extra_buf, extra_len);
- }
-
- /* Careful here, end may be a pointer into extra_buf... */
- memmove (&extra_buf[n], end, len + 1);
- name = end = memcpy (extra_buf, buf, n);
-
- if (buf[0] == '/')
- dest = rname + 1; /* It's an absolute symlink */
- else
- /* Back up to previous component, ignore if at root already: */
- if (dest > rname + 1)
- while ((--dest)[-1] != '/');
-
- free (buf);
- }
- else
- {
- if (!S_ISDIR (st.st_mode) && *end && (can_mode != CAN_MISSING))
- {
- errno = ENOTDIR;
- goto error;
- }
- }
- }
- }
- if (dest > rname + 1 && dest[-1] == '/')
- --dest;
- *dest = '\0';
-
- free (extra_buf);
- return rname;
-
-error:
- free (extra_buf);
- free (rname);
- return NULL;
-}
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