124 lines
3 KiB
C
124 lines
3 KiB
C
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/* provide a replacement openat function
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Copyright (C) 2004-2006, 2008-2021 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* written by Jim Meyering */
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#ifndef _GL_HEADER_OPENAT
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#define _GL_HEADER_OPENAT
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <stdbool.h>
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#ifndef _GL_INLINE_HEADER_BEGIN
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#error "Please include config.h first."
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#endif
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_GL_INLINE_HEADER_BEGIN
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#if !HAVE_OPENAT
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int openat_permissive (int fd, char const *file, int flags, mode_t mode,
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int *cwd_errno);
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bool openat_needs_fchdir (void);
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#else
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# define openat_permissive(Fd, File, Flags, Mode, Cwd_errno) \
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openat (Fd, File, Flags, Mode)
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# define openat_needs_fchdir() false
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#endif
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_Noreturn void openat_restore_fail (int);
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_Noreturn void openat_save_fail (int);
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/* Using these function names makes application code
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slightly more readable than it would be with
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fchownat (..., 0) or fchownat (..., AT_SYMLINK_NOFOLLOW). */
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#if GNULIB_CHOWNAT
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# ifndef CHOWNAT_INLINE
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# define CHOWNAT_INLINE _GL_INLINE
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# endif
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CHOWNAT_INLINE int
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chownat (int fd, char const *file, uid_t owner, gid_t group)
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{
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return fchownat (fd, file, owner, group, 0);
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}
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CHOWNAT_INLINE int
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lchownat (int fd, char const *file, uid_t owner, gid_t group)
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{
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return fchownat (fd, file, owner, group, AT_SYMLINK_NOFOLLOW);
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}
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#endif
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#if GNULIB_CHMODAT
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# ifndef CHMODAT_INLINE
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# define CHMODAT_INLINE _GL_INLINE
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# endif
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CHMODAT_INLINE int
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chmodat (int fd, char const *file, mode_t mode)
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{
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return fchmodat (fd, file, mode, 0);
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}
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CHMODAT_INLINE int
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lchmodat (int fd, char const *file, mode_t mode)
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{
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return fchmodat (fd, file, mode, AT_SYMLINK_NOFOLLOW);
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}
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#endif
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#if GNULIB_STATAT
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# ifndef STATAT_INLINE
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# define STATAT_INLINE _GL_INLINE
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# endif
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STATAT_INLINE int
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statat (int fd, char const *name, struct stat *st)
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{
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return fstatat (fd, name, st, 0);
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}
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STATAT_INLINE int
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lstatat (int fd, char const *name, struct stat *st)
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{
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return fstatat (fd, name, st, AT_SYMLINK_NOFOLLOW);
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}
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#endif
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/* For now, there are no wrappers named laccessat or leuidaccessat,
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since gnulib doesn't support faccessat(,AT_SYMLINK_NOFOLLOW) and
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since access rights on symlinks are of limited utility. Likewise,
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wrappers are not provided for accessat or euidaccessat, so as to
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avoid dragging in -lgen on some platforms. */
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_GL_INLINE_HEADER_END
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#endif /* _GL_HEADER_OPENAT */
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