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/* Prototypes for openat-style fd-relative SELinux functions
Copyright (C) 2007, 2009-2023 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 <https://www.gnu.org/licenses/>. */
#include <selinux/selinux.h>
#include <selinux/context.h>
/* These are the dir-fd-relative variants of the functions without the
"at" suffix. For example, getfileconat (AT_FDCWD, file, &c) is usually
equivalent to getfilecon (file, &c). The emulation is accomplished
by first attempting getfilecon ("/proc/self/fd/DIR_FD/FILE", &c).
Failing that, simulate it via save_cwd/fchdir/getfilecon/restore_cwd.
If either the save_cwd or the restore_cwd fails (relatively unlikely),
then give a diagnostic and exit nonzero. */
/* dir-fd-relative getfilecon. Set *CON to the SELinux security context
of the file specified by DIR_FD and FILE and return the length of *CON.
DIR_FD and FILE are interpreted as for fstatat[*]. A non-NULL *CON
must be freed with freecon. Upon error, set *CON to NULL, set errno
and return -1.
[*] with flags=0 here, with flags=AT_SYMLINK_NOFOLLOW for lgetfileconat */
int getfileconat (int dir_fd, char const *file, char **con);
/* dir-fd-relative lgetfilecon. This function is just like getfileconat,
except when DIR_FD and FILE specify a symlink: lgetfileconat operates on
the symlink, while getfileconat operates on the referent of the symlink. */
int lgetfileconat (int dir_fd, char const *file, char **con);
/* dir-fd-relative setfilecon. Set the SELinux security context of
the file specified by DIR_FD and FILE to CON. DIR_FD and FILE are
interpreted as for fstatat[*]. Upon success, return 0.
Otherwise, return -1 and set errno. */
int setfileconat (int dir_fd, char const *file, char const *con);
/* dir-fd-relative lsetfilecon. This function is just like setfileconat,
except that rather than dereferencing a symlink, this function affects it. */
/* dir-fd-relative lsetfilecon. This function is just like setfileconat,
except when DIR_FD and FILE specify a symlink: lsetfileconat operates on
the symlink, while setfileconat operates on the referent of the symlink. */
int lsetfileconat (int dir_fd, char const *file, char const *con);
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