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/* provide a replacement openat function
Copyright (C) 2004-2006, 2008-2010 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 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, 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)
# define __attribute__(x) /* empty */
# endif
#endif
#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
#endif
void openat_restore_fail (int) ATTRIBUTE_NORETURN;
void openat_save_fail (int) ATTRIBUTE_NORETURN;
/* 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);
}
#if GNULIB_FACCESSAT
/* 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. */
static inline int
accessat (int fd, char const *file, int mode)
{
return faccessat (fd, file, mode, 0);
}
static inline int
euidaccessat (int fd, char const *file, int mode)
{
return faccessat (fd, file, mode, AT_EACCESS);
}
#endif
#endif /* _GL_HEADER_OPENAT */
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