/* provide a replacement openat function
- Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
+ Copyright (C) 2004-2006, 2008-2014 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 Jim Meyering */
+#ifndef _GL_HEADER_OPENAT
+#define _GL_HEADER_OPENAT
+
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
-#include <dirent.h>
#include <unistd.h>
#include <stdbool.h>
-#ifndef __attribute__
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
-# define __attribute__(x) /* empty */
-# endif
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
#endif
+_GL_INLINE_HEADER_BEGIN
-#ifndef ATTRIBUTE_NORETURN
-# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
-#endif
+#if !HAVE_OPENAT
+
+int openat_permissive (int fd, char const *file, int flags, mode_t mode,
+ int *cwd_errno);
+bool openat_needs_fchdir (void);
+
+#else
+
+# define openat_permissive(Fd, File, Flags, Mode, Cwd_errno) \
+ openat (Fd, File, Flags, Mode)
+# define openat_needs_fchdir() false
-/* Work around a bug in Solaris 9 and 10: AT_FDCWD is positive. Its
- value exceeds INT_MAX, so its use as an int doesn't conform to the
- C standard, and GCC and Sun C complain in some cases. If the bug
- is present, undef AT_FDCWD here, so it can be redefined below. */
-#if 0 < AT_FDCWD && AT_FDCWD == 0xffd19553
-# undef AT_FDCWD
#endif
-/* Use the same bit pattern as Solaris 9, but with the proper
- signedness. The bit pattern is important, in case this actually is
- Solaris with the above workaround. */
-#ifndef AT_FDCWD
-# define AT_FDCWD (-3041965)
+_Noreturn void openat_restore_fail (int);
+_Noreturn void openat_save_fail (int);
+
+/* Using these function names makes application code
+ slightly more readable than it would be with
+ fchownat (..., 0) or fchownat (..., AT_SYMLINK_NOFOLLOW). */
+
+#if GNULIB_FCHOWNAT
+
+# ifndef FCHOWNAT_INLINE
+# define FCHOWNAT_INLINE _GL_INLINE
+# endif
+
+FCHOWNAT_INLINE int
+chownat (int fd, char const *file, uid_t owner, gid_t group)
+{
+ return fchownat (fd, file, owner, group, 0);
+}
+
+FCHOWNAT_INLINE int
+lchownat (int fd, char const *file, uid_t owner, gid_t group)
+{
+ return fchownat (fd, file, owner, group, AT_SYMLINK_NOFOLLOW);
+}
+
#endif
-/* Use the same values as Solaris 9. This shouldn't matter, but
- there's no real reason to differ. */
-#ifndef AT_SYMLINK_NOFOLLOW
-# define AT_SYMLINK_NOFOLLOW 4096
-# define AT_REMOVEDIR 1
+#if GNULIB_FCHMODAT
+
+# ifndef FCHMODAT_INLINE
+# define FCHMODAT_INLINE _GL_INLINE
+# endif
+
+FCHMODAT_INLINE int
+chmodat (int fd, char const *file, mode_t mode)
+{
+ return fchmodat (fd, file, mode, 0);
+}
+
+FCHMODAT_INLINE int
+lchmodat (int fd, char const *file, mode_t mode)
+{
+ return fchmodat (fd, file, mode, AT_SYMLINK_NOFOLLOW);
+}
+
#endif
-#ifdef __OPENAT_PREFIX
+#if GNULIB_STATAT
-# undef openat
-# define __OPENAT_CONCAT(x, y) x ## y
-# define __OPENAT_XCONCAT(x, y) __OPENAT_CONCAT (x, y)
-# define __OPENAT_ID(y) __OPENAT_XCONCAT (__OPENAT_PREFIX, y)
-# define openat __OPENAT_ID (openat)
-int openat (int fd, char const *file, int flags, /* mode_t mode */ ...);
-int openat_permissive (int fd, char const *file, int flags, mode_t mode,
- int *cwd_errno);
-# if ! HAVE_FDOPENDIR
-# define fdopendir __OPENAT_ID (fdopendir)
+# ifndef STATAT_INLINE
+# define STATAT_INLINE _GL_INLINE
# endif
-DIR *fdopendir (int fd);
-# define fstatat __OPENAT_ID (fstatat)
-int fstatat (int fd, char const *file, struct stat *st, int flag);
-# define unlinkat __OPENAT_ID (unlinkat)
-int unlinkat (int fd, char const *file, int flag);
-#else
+STATAT_INLINE int
+statat (int fd, char const *name, struct stat *st)
+{
+ return fstatat (fd, name, st, 0);
+}
-# define openat_permissive(Fd, File, Flags, Mode, Cwd_errno) \
- openat (Fd, File, Flags, Mode)
+STATAT_INLINE int
+lstatat (int fd, char const *name, struct stat *st)
+{
+ return fstatat (fd, name, st, AT_SYMLINK_NOFOLLOW);
+}
#endif
-int mkdirat (int fd, char const *file, mode_t mode);
-void openat_restore_fail (int) ATTRIBUTE_NORETURN;
-void openat_save_fail (int) ATTRIBUTE_NORETURN;
+/* For now, there are no wrappers named laccessat or leuidaccessat,
+ since gnulib doesn't support faccessat(,AT_SYMLINK_NOFOLLOW) and
+ since access rights on symlinks are of limited utility. Likewise,
+ wrappers are not provided for accessat or euidaccessat, so as to
+ avoid dragging in -lgen on some platforms. */
+
+_GL_INLINE_HEADER_END
+
+#endif /* _GL_HEADER_OPENAT */
projects / gnulib.git / blobdiff