if (mknod(busnode, (st.st_mode & ~07777) | 0600, st.st_rdev) < 0) {
log_error_errno(errno, "mknod() for %s failed: %m", busnode);
r = -errno;
if (mknod(busnode, (st.st_mode & ~07777) | 0600, st.st_rdev) < 0) {
log_error_errno(errno, "mknod() for %s failed: %m", busnode);
r = -errno;