+ retval = fcntl(pipefds[0], F_SETFL, O_NONBLOCK);
+ if (retval < 0) {
+ dbg("error fcntl on read pipe: %s", strerror(errno));
+ exit(1);
+ }
+
+ retval = fcntl(pipefds[1], F_SETFL, O_NONBLOCK);
+ if (retval < 0) {
+ dbg("error fcntl on write pipe: %s", strerror(errno));
+ exit(1);
+ }
+
+ /* set signal handlers */
+ act.sa_handler = sig_handler;
+ sigemptyset(&act.sa_mask);
+ act.sa_flags = SA_RESTART;
+ sigaction(SIGINT, &act, NULL);
+ sigaction(SIGTERM, &act, NULL);
+ sigaction(SIGALRM, &act, NULL);
+ sigaction(SIGCHLD, &act, NULL);
+
+ memset(&saddr, 0x00, sizeof(saddr));
+ saddr.sun_family = AF_LOCAL;
+ /* use abstract namespace for socket path */
+ strcpy(&saddr.sun_path[1], UDEVD_SOCK_PATH);
+ addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
+
+ ssock = socket(AF_LOCAL, SOCK_DGRAM, 0);
+ if (ssock == -1) {
+ dbg("error getting socket, exit");
+ exit(1);
+ }
+
+ /* the bind takes care of ensuring only one copy running */
+ retval = bind(ssock, (struct sockaddr *) &saddr, addrlen);
+ if (retval < 0) {
+ dbg("bind failed, exit");
+ goto exit;
+ }
+
+ /* enable receiving of the sender credentials */
+ setsockopt(ssock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on));
+
+ /* possible override of udev binary, used for testing */
+ udev_bin = getenv("UDEV_BIN");
+ if (udev_bin != NULL)
+ dbg("udev binary is set to '%s'", udev_bin);
+ else
+ udev_bin = UDEV_BIN;
+
+ FD_ZERO(&readfds);
+ FD_SET(ssock, &readfds);
+ FD_SET(pipefds[0], &readfds);
+ maxsockplus = ssock+1;
+ while (1) {
+ fd_set workreadfds = readfds;
+ retval = select(maxsockplus, &workreadfds, NULL, NULL, NULL);
+
+ if (retval < 0) {
+ if (errno != EINTR)
+ dbg("error in select: %s", strerror(errno));
+ continue;
+ }
+
+ if (FD_ISSET(ssock, &workreadfds))
+ handle_msg(ssock);
+
+ if (FD_ISSET(pipefds[0], &workreadfds))
+ user_sighandler();
+
+ if (children_waiting) {
+ children_waiting = 0;
+ reap_kids();
+ }