/* provide a replacement openat function

   Copyright (C) 2004-2006, 2008-2017 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 <unistd.h>

#include <stdbool.h>

#ifndef _GL_INLINE_HEADER_BEGIN

 #error "Please include config.h first."

#endif

_GL_INLINE_HEADER_BEGIN

#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

_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

#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

#if GNULIB_STATAT

# ifndef STATAT_INLINE

#  define STATAT_INLINE _GL_INLINE

# endif

STATAT_INLINE int

statat (int fd, char const *name, struct stat *st)

{

  return fstatat (fd, name, st, 0);

}

STATAT_INLINE int

lstatat (int fd, char const *name, struct stat *st)

{

  return fstatat (fd, name, st, AT_SYMLINK_NOFOLLOW);

}

#endif

/* 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 */