openat: Work around compilation error with OSF/1 5.1 DTK cc.

[gnulib.git] / lib / openat.h

diff --git a/lib/openat.h b/lib/openat.h
index 4c2a2e0..fb4f4d8 100644 (file)
--- a/lib/openat.h
+++ b/lib/openat.h
@@ -1,10 +1,10 @@
 /* provide a replacement openat function
-   Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2004-2006, 2008-2011 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
@@ -12,53 +12,83 @@
    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 */
 
-#include <fcntl.h>
+#ifndef _GL_HEADER_OPENAT
+#define _GL_HEADER_OPENAT
+
+/* Write "fcntl.h" here, not <fcntl.h>, otherwise OSF/1 5.1 DTK cc miscompiles
+   openat.c because that file has a preliminary #include <fcntl.h>.  */
+#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
-#endif
+#if !HAVE_OPENAT
 
-#ifndef ATTRIBUTE_NORETURN
-# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
-#endif
+int openat_permissive (int fd, char const *file, int flags, mode_t mode,
+                       int *cwd_errno);
+bool openat_needs_fchdir (void);
+
+#else
 
-#ifndef AT_FDCWD
-# define AT_FDCWD (-3041965)           /* same value as Solaris 9 */
-# define AT_SYMLINK_NOFOLLOW 4096      /* same value as Solaris 9 */
-# define AT_REMOVEDIR (0x1)            /* same value as Solaris 9 */
-
-# ifdef __OPENAT_PREFIX
-#  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 */ ...);
-#  if ! HAVE_FDOPENDIR
-#   define fdopendir __OPENAT_ID (fdopendir)
-#  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);
-void openat_restore_fail (int) ATTRIBUTE_NORETURN;
-void openat_save_fail (int) ATTRIBUTE_NORETURN;
-# else
-#  define openat_restore_fail(Errno) /* empty */
-#  define openat_save_fail(Errno) /* empty */
-# endif
+# define openat_permissive(Fd, File, Flags, Mode, Cwd_errno) \
+    openat (Fd, File, Flags, Mode)
+# define openat_needs_fchdir() false
 
 #endif
+
+_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).  */
+static inline int
+chownat (int fd, char const *file, uid_t owner, gid_t group)
+{
+  return fchownat (fd, file, owner, group, 0);
+}
+
+static inline int
+lchownat (int fd, char const *file, uid_t owner, gid_t group)
+{
+  return fchownat (fd, file, owner, group, AT_SYMLINK_NOFOLLOW);
+}
+
+static inline int
+chmodat (int fd, char const *file, mode_t mode)
+{
+  return fchmodat (fd, file, mode, 0);
+}
+
+static inline int
+lchmodat (int fd, char const *file, mode_t mode)
+{
+  return fchmodat (fd, file, mode, AT_SYMLINK_NOFOLLOW);
+}
+
+static inline int
+statat (int fd, char const *name, struct stat *st)
+{
+  return fstatat (fd, name, st, 0);
+}
+
+static inline int
+lstatat (int fd, char const *name, struct stat *st)
+{
+  return fstatat (fd, name, st, AT_SYMLINK_NOFOLLOW);
+}
+
+/* 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.  */
+
+#endif /* _GL_HEADER_OPENAT */