r = fd_is_temporary_fs(fd);
if (r < 0)
return log_error_errno(r, "Failed to determine whether %s is on a temporary file system: %m", etc_machine_id);
- if (r == 0) {
- log_error("%s is not on a temporary file system.", etc_machine_id);
- return -EROFS;
- }
+ if (r == 0)
+ return log_error_errno(SYNTHETIC_ERRNO(EROFS),
+ "%s is not on a temporary file system.",
+ etc_machine_id);
r = id128_read_fd(fd, ID128_PLAIN, &id);
if (r < 0)