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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <errno.h>
#include <sys/stat.h>
#include <unistd.h>
#include "btrfs-util.h"
#include "fs-util.h"
#include "label.h"
#include "label-util.h"
#include "macro.h"
#include "selinux-util.h"
#include "smack-util.h"
int label_fix_full(
int atfd,
const char *inode_path, /* path of inode to apply label to */
const char *label_path, /* path to use as database lookup key in label database (typically same as inode_path, but not always) */
LabelFixFlags flags) {
int r, q;
if (atfd < 0 && atfd != AT_FDCWD)
return -EBADF;
if (!inode_path && atfd < 0) /* We need at least one of atfd and an inode path */
return -EINVAL;
/* If both atfd and inode_path are specified, we take the specified path relative to atfd which must be an fd to a dir.
*
* If only atfd is specified (and inode_path is NULL), we'll operated on the inode the atfd refers to.
*
* If atfd is AT_FDCWD then we'll operate on the inode the path refers to.
*/
r = mac_selinux_fix_full(atfd, inode_path, label_path, flags);
q = mac_smack_fix_full(atfd, inode_path, label_path, flags);
if (r < 0)
return r;
if (q < 0)
return q;
return 0;
}
int symlink_label(const char *old_path, const char *new_path) {
int r;
assert(old_path);
assert(new_path);
r = mac_selinux_create_file_prepare(new_path, S_IFLNK);
if (r < 0)
return r;
r = RET_NERRNO(symlink(old_path, new_path));
mac_selinux_create_file_clear();
if (r < 0)
return r;
return mac_smack_fix(new_path, 0);
}
int symlink_atomic_full_label(const char *from, const char *to, bool make_relative) {
int r;
assert(from);
assert(to);
r = mac_selinux_create_file_prepare(to, S_IFLNK);
if (r < 0)
return r;
r = symlinkat_atomic_full(from, AT_FDCWD, to, make_relative);
mac_selinux_create_file_clear();
if (r < 0)
return r;
return mac_smack_fix(to, 0);
}
int mknod_label(const char *pathname, mode_t mode, dev_t dev) {
int r;
assert(pathname);
r = mac_selinux_create_file_prepare(pathname, mode);
if (r < 0)
return r;
r = RET_NERRNO(mknod(pathname, mode, dev));
mac_selinux_create_file_clear();
if (r < 0)
return r;
return mac_smack_fix(pathname, 0);
}
int btrfs_subvol_make_label(const char *path) {
int r;
assert(path);
r = mac_selinux_create_file_prepare(path, S_IFDIR);
if (r < 0)
return r;
r = btrfs_subvol_make(AT_FDCWD, path);
mac_selinux_create_file_clear();
if (r < 0)
return r;
return mac_smack_fix(path, 0);
}
static int init_internal(bool lazy) {
int r;
assert(!(mac_selinux_use() && mac_smack_use()));
if (lazy)
r = mac_selinux_init_lazy();
else
r = mac_selinux_init();
if (r < 0)
return r;
return mac_smack_init();
}
int mac_init_lazy(void) {
return init_internal(/* lazy=*/ true);
}
int mac_init(void) {
return init_internal(/* lazy=*/ false);
}
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