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/* fuse-overlayfs: Overlay Filesystem in Userspace
Copyright (C) 2019 Red Hat 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 2 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/>.
*/
#ifndef UTILS_H
#define UTILS_H
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <config.h>
#include <dirent.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include "fuse-overlayfs.h"
#define XATTR_OVERRIDE_STAT "user.fuseoverlayfs.override_stat"
#define XATTR_PRIVILEGED_OVERRIDE_STAT "security.fuseoverlayfs.override_stat"
#define XATTR_OVERRIDE_CONTAINERS_STAT "user.containers.override_stat"
void cleanup_freep (void *p);
void cleanup_filep (FILE **f);
void cleanup_closep (void *p);
void cleanup_dirp (DIR **p);
int file_exists_at (int dirfd, const char *pathname);
int strconcat3 (char *dest, size_t size, const char *s1, const char *s2, const char *s3);
int open_fd_or_get_path (struct ovl_layer *l, const char *path, char *out, int *fd, int flags);
#define cleanup_file __attribute__ ((cleanup (cleanup_filep)))
#define cleanup_free __attribute__ ((cleanup (cleanup_freep)))
#define cleanup_close __attribute__ ((cleanup (cleanup_closep)))
#define cleanup_dir __attribute__ ((cleanup (cleanup_dirp)))
#define LIKELY(x) __builtin_expect ((x), 1)
#define UNLIKELY(x) __builtin_expect ((x), 0)
#ifdef HAVE_STATX
void statx_to_stat (struct statx *stx, struct stat *st);
#endif
int safe_openat (int dirfd, const char *pathname, int flags, mode_t mode);
int override_mode (struct ovl_layer *l, int fd, const char *abs_path, const char *path, struct stat *st);
#endif
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