int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, bool follow_symlink, mkdir_func_t _mkdir) {
struct stat st;
int r;
assert(_mkdir != mkdir);
if (_mkdir(path, mode) >= 0) {
r = chmod_and_chown(path, mode, uid, gid);
if (r < 0)
return r;
}
if (lstat(path, &st) < 0)
return -errno;
if (follow_symlink && S_ISLNK(st.st_mode)) {
_cleanup_free_ char *p = NULL;
r = chase_symlinks(path, NULL, CHASE_NONEXISTENT, &p);
if (r < 0)
return r;
if (r == 0)
return mkdir_safe_internal(p, mode, uid, gid, false, _mkdir);
if (lstat(p, &st) < 0)
return -errno;
}
if ((st.st_mode & 0007) > (mode & 0007) ||
(st.st_mode & 0070) > (mode & 0070) ||
(st.st_mode & 0700) > (mode & 0700) ||
(uid != UID_INVALID && st.st_uid != uid) ||
(gid != GID_INVALID && st.st_gid != gid) ||
!S_ISDIR(st.st_mode))
return -EEXIST;
return 0;
}
int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid, bool follow_symlink) {
return mkdir_safe_internal(path, mode, uid, gid, follow_symlink, mkdir_errno_wrapper);
}
int mkdir_safe_label(const char *path, mode_t mode, uid_t uid, gid_t gid, MkdirFlags flags) {
return mkdir_safe_internal(path, mode, uid, gid, flags, mkdir_label);
}
int mkdir_safe(const char *path, mode_t mode, uid_t uid, gid_t gid) {
return mkdir_safe_internal(path, mode, uid, gid, mkdir);
}
int mkdir_safe_label(const char *path, mode_t mode, uid_t uid, gid_t gid) {
return mkdir_safe_internal(path, mode, uid, gid, true);
}