/* mkdir-p.c -- Ensure that a directory and its parents exist.
- Copyright (C) 1990, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2006
- Free Software Foundation, Inc.
+ Copyright (C) 1990, 1997-2000, 2002-2007, 2009-2011 Free Software
+ Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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.
+ the Free Software Foundation; either version 3 of the License, 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
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Paul Eggert, David MacKenzie, and Jim Meyering. */
#include <errno.h>
#include <sys/stat.h>
+#include <unistd.h>
#include "gettext.h"
#define _(msgid) gettext (msgid)
-#include "dirchownmod.c"
+#include "dirchownmod.h"
+#include "dirname.h"
#include "error.h"
#include "quote.h"
#include "mkancesdirs.h"
-#include "stat-macros.h"
+#include "savewd.h"
+
+#ifndef HAVE_FCHMOD
+# define HAVE_FCHMOD false
+#endif
/* Ensure that the directory DIR exists.
+ WD is the working directory, as in savewd.c.
+
If MAKE_ANCESTOR is not null, create any ancestor directories that
- don't already exist, by invoking MAKE_ANCESTOR (ANCESTOR, OPTIONS).
+ don't already exist, by invoking MAKE_ANCESTOR (DIR, ANCESTOR, OPTIONS).
This function should return zero if successful, -1 (setting errno)
otherwise. In this case, DIR may be modified by storing '\0' bytes
into it, to access the ancestor directories, and this modification
created.
Create DIR as a new directory with using mkdir with permissions
- MODE. It is also OK if MAKE_ANCESTOR_DIR is not null and a
+ MODE. It is also OK if MAKE_ANCESTOR is not null and a
directory DIR already exists.
Call ANNOUNCE (DIR, OPTIONS) just after successfully making DIR,
This implementation assumes the current umask is zero.
Return true if DIR exists as a directory with the proper ownership
- and file mode bits when done. Report a diagnostic and return false
- on failure, storing '\0' into *DIR if an ancestor directory had
- problems. */
+ and file mode bits when done, or if a child process has been
+ dispatched to do the real work (though the child process may not
+ have finished yet -- it is the caller's responsibility to handle
+ this). Report a diagnostic and return false on failure, storing
+ '\0' into *DIR if an ancestor directory had problems. */
bool
make_dir_parents (char *dir,
- int (*make_ancestor) (char const *, void *),
- void *options,
- mode_t mode,
- void (*announce) (char const *, void *),
- mode_t mode_bits,
- uid_t owner,
- gid_t group,
- bool preserve_existing)
+ struct savewd *wd,
+ int (*make_ancestor) (char const *, char const *, void *),
+ void *options,
+ mode_t mode,
+ void (*announce) (char const *, void *),
+ mode_t mode_bits,
+ uid_t owner,
+ gid_t group,
+ bool preserve_existing)
{
- bool made_dir = (mkdir (dir, mode) == 0);
-
- if (!made_dir && make_ancestor && errno == ENOENT)
- {
- if (mkancesdirs (dir, make_ancestor, options) == 0)
- made_dir = (mkdir (dir, mode) == 0);
- else
- {
- /* mkancestdirs updated DIR for a better-looking
- diagnostic, so don't try to stat DIR below. */
- make_ancestor = NULL;
- }
- }
-
- if (made_dir)
- {
- announce (dir, options);
- preserve_existing =
- (owner == (uid_t) -1 && group == (gid_t) -1
- && ! ((mode_bits & (S_ISUID | S_ISGID)) | (mode & S_ISVTX)));
- }
- else
- {
- int mkdir_errno = errno;
- struct stat st;
- if (! (make_ancestor && mkdir_errno != ENOENT
- && stat (dir, &st) == 0 && S_ISDIR (st.st_mode)))
- {
- error (0, mkdir_errno, _("cannot create directory %s"), quote (dir));
- return false;
- }
- }
+ int mkdir_errno = (IS_ABSOLUTE_FILE_NAME (dir) ? 0 : savewd_errno (wd));
- if (! preserve_existing
- && (dirchownmod (dir, (made_dir ? mode : (mode_t) -1),
- owner, group, mode, mode_bits)
- != 0))
+ if (mkdir_errno == 0)
{
- error (0, errno,
- _(owner == (uid_t) -1 && group == (gid_t) -1
- ? "cannot change permissions of %s"
- : "cannot change owner and permissions of %s"),
- quote (dir));
- return false;
+ ptrdiff_t prefix_len = 0;
+ int savewd_chdir_options = (HAVE_FCHMOD ? SAVEWD_CHDIR_SKIP_READABLE : 0);
+
+ if (make_ancestor)
+ {
+ prefix_len = mkancesdirs (dir, wd, make_ancestor, options);
+ if (prefix_len < 0)
+ {
+ if (prefix_len < -1)
+ return true;
+ mkdir_errno = errno;
+ }
+ }
+
+ if (0 <= prefix_len)
+ {
+ /* If the ownership might change, or if the directory will be
+ writeable to other users and its special mode bits may
+ change after the directory is created, create it with
+ more restrictive permissions at first, so unauthorized
+ users cannot nip in before the directory is ready. */
+ bool keep_owner = owner == (uid_t) -1 && group == (gid_t) -1;
+ bool keep_special_mode_bits =
+ ((mode_bits & (S_ISUID | S_ISGID)) | (mode & S_ISVTX)) == 0;
+ mode_t mkdir_mode = mode;
+ if (! keep_owner)
+ mkdir_mode &= ~ (S_IRWXG | S_IRWXO);
+ else if (! keep_special_mode_bits)
+ mkdir_mode &= ~ (S_IWGRP | S_IWOTH);
+
+ if (mkdir (dir + prefix_len, mkdir_mode) == 0)
+ {
+ announce (dir, options);
+ preserve_existing = keep_owner & keep_special_mode_bits;
+ savewd_chdir_options |=
+ (SAVEWD_CHDIR_NOFOLLOW
+ | (mode & S_IRUSR ? SAVEWD_CHDIR_READABLE : 0));
+ }
+ else
+ {
+ mkdir_errno = errno;
+ mkdir_mode = -1;
+ }
+
+ if (preserve_existing)
+ {
+ struct stat st;
+ if (mkdir_errno == 0
+ || (mkdir_errno != ENOENT && make_ancestor
+ && stat (dir + prefix_len, &st) == 0
+ && S_ISDIR (st.st_mode)))
+ return true;
+ }
+ else
+ {
+ int open_result[2];
+ int chdir_result =
+ savewd_chdir (wd, dir + prefix_len,
+ savewd_chdir_options, open_result);
+ if (chdir_result < -1)
+ return true;
+ else
+ {
+ bool chdir_ok = (chdir_result == 0);
+ int chdir_errno = errno;
+ int fd = open_result[0];
+ bool chdir_failed_unexpectedly =
+ (mkdir_errno == 0
+ && ((! chdir_ok && (mode & S_IXUSR))
+ || (fd < 0 && (mode & S_IRUSR))));
+
+ if (chdir_failed_unexpectedly)
+ {
+ /* No need to save errno here; it's irrelevant. */
+ if (0 <= fd)
+ close (fd);
+ }
+ else
+ {
+ char const *subdir = (chdir_ok ? "." : dir + prefix_len);
+ if (dirchownmod (fd, subdir, mkdir_mode, owner, group,
+ mode, mode_bits)
+ == 0)
+ return true;
+ }
+
+ if (mkdir_errno == 0
+ || (mkdir_errno != ENOENT && make_ancestor
+ && errno != ENOTDIR))
+ {
+ error (0,
+ (! chdir_failed_unexpectedly ? errno
+ : ! chdir_ok && (mode & S_IXUSR) ? chdir_errno
+ : open_result[1]),
+ _(keep_owner
+ ? "cannot change permissions of %s"
+ : "cannot change owner and permissions of %s"),
+ quote (dir));
+ return false;
+ }
+ }
+ }
+ }
}
- return true;
+ error (0, mkdir_errno, _("cannot create directory %s"), quote (dir));
+ return false;
}
projects / gnulib.git / blobdiff