/* euidaccess -- check if effective user id can access file
- Copyright (C) 1990, 1991, 1995, 1998, 2000, 2003, 2004, 2005 Free
+ Copyright (C) 1990-1991, 1995, 1998, 2000, 2003-2006, 2008-2010 Free
Software Foundation, Inc.
This file is part of the GNU C Library.
- 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
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; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by David MacKenzie and Torbjorn Granlund.
Adapted for GNU C library by Roland McGrath. */
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
-
#ifndef _LIBC
-# include "euidaccess.h"
+# include <config.h>
#endif
+#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
-
-#if HAVE_UNISTD_H || defined _LIBC
-# include <unistd.h>
-#endif
+#include <unistd.h>
#if HAVE_LIBGEN_H
# include <libgen.h>
#else
# include "group-member.h"
-# include "stat-macros.h"
#endif
int
euidaccess (const char *file, int mode)
{
-#if defined EFF_ONLY_OK
+#if HAVE_FACCESSAT
+ return faccessat (AT_FDCWD, file, mode, AT_EACCESS);
+#elif defined EFF_ONLY_OK
return access (file, mode | EFF_ONLY_OK);
#elif defined ACC_SELF
return accessx (file, mode, ACC_SELF);
int saved_errno;
if (uid != euid)
- setreuid (euid, uid);
+ setreuid (euid, uid);
if (gid != egid)
- setregid (egid, gid);
+ setregid (egid, gid);
result = access (file, mode);
saved_errno = errno;
/* Restore them. */
if (uid != euid)
- setreuid (uid, euid);
+ setreuid (uid, euid);
if (gid != egid)
- setregid (gid, egid);
+ setregid (gid, egid);
errno = saved_errno;
return result;
/* The super-user can read and write any file, and execute any file
that anyone can execute. */
if (euid == 0 && ((mode & X_OK) == 0
- || (stats.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))))
+ || (stats.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))))
return 0;
/* Convert the mode to traditional form, clearing any bogus bits. */
mode &= 7;
else
mode = ((mode & R_OK ? 4 : 0)
- + (mode & W_OK ? 2 : 0)
- + (mode & X_OK ? 1 : 0));
+ + (mode & W_OK ? 2 : 0)
+ + (mode & X_OK ? 1 : 0));
if (mode == 0)
- return 0; /* The file exists. */
+ return 0; /* The file exists. */
/* Convert the file's permission bits to traditional form. */
if (S_IRUSR == (4 << 6) && S_IWUSR == (2 << 6) && S_IXUSR == (1 << 6)
granted = stats.st_mode;
else
granted = ((stats.st_mode & S_IRUSR ? 4 << 6 : 0)
- + (stats.st_mode & S_IWUSR ? 2 << 6 : 0)
- + (stats.st_mode & S_IXUSR ? 1 << 6 : 0)
- + (stats.st_mode & S_IRGRP ? 4 << 3 : 0)
- + (stats.st_mode & S_IWGRP ? 2 << 3 : 0)
- + (stats.st_mode & S_IXGRP ? 1 << 3 : 0)
- + (stats.st_mode & S_IROTH ? 4 << 0 : 0)
- + (stats.st_mode & S_IWOTH ? 2 << 0 : 0)
- + (stats.st_mode & S_IXOTH ? 1 << 0 : 0));
+ + (stats.st_mode & S_IWUSR ? 2 << 6 : 0)
+ + (stats.st_mode & S_IXUSR ? 1 << 6 : 0)
+ + (stats.st_mode & S_IRGRP ? 4 << 3 : 0)
+ + (stats.st_mode & S_IWGRP ? 2 << 3 : 0)
+ + (stats.st_mode & S_IXGRP ? 1 << 3 : 0)
+ + (stats.st_mode & S_IROTH ? 4 << 0 : 0)
+ + (stats.st_mode & S_IWOTH ? 2 << 0 : 0)
+ + (stats.st_mode & S_IXOTH ? 1 << 0 : 0));
if (euid == stats.st_uid)
granted >>= 6;