int main(int argc, char *argv[]) { struct udev *udev; struct udev_event *event = NULL; struct udev_device *dev = NULL; struct udev_rules *rules = NULL; char syspath[UTIL_PATH_SIZE]; const char *devpath; const char *action; sigset_t mask, sigmask_orig; int err = -EINVAL; udev = udev_new(); if (udev == NULL) exit(1); info(udev, "version %s\n", VERSION); udev_selinux_init(udev); sigprocmask(SIG_SETMASK, NULL, &sigmask_orig); action = argv[1]; if (action == NULL) { err(udev, "action missing\n"); goto out; } devpath = argv[2]; if (devpath == NULL) { err(udev, "devpath missing\n"); goto out; } rules = udev_rules_new(udev, 1); util_strscpyl(syspath, sizeof(syspath), udev_get_sys_path(udev), devpath, NULL); dev = udev_device_new_from_syspath(udev, syspath); if (dev == NULL) { info(udev, "unknown device '%s'\n", devpath); goto out; } udev_device_set_action(dev, action); event = udev_event_new(dev); sigfillset(&mask); sigprocmask(SIG_SETMASK, &mask, &sigmask_orig); event->fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); if (event->fd_signal < 0) { fprintf(stderr, "error creating signalfd\n"); goto out; } /* do what devtmpfs usually provides us */ if (udev_device_get_devnode(dev) != NULL) { mode_t mode; if (strcmp(udev_device_get_subsystem(dev), "block") == 0) mode |= S_IFBLK; else mode |= S_IFCHR; if (strcmp(action, "remove") != 0) { util_create_path(udev, udev_device_get_devnode(dev)); mknod(udev_device_get_devnode(dev), mode, udev_device_get_devnum(dev)); } else { unlink(udev_device_get_devnode(dev)); util_delete_path(udev, udev_device_get_devnode(dev)); } } err = udev_event_execute_rules(event, rules, &sigmask_orig); if (err == 0) udev_event_execute_run(event, NULL); out: if (event != NULL && event->fd_signal >= 0) close(event->fd_signal); udev_event_unref(event); udev_device_unref(dev); udev_rules_unref(rules); udev_selinux_exit(udev); udev_unref(udev); if (err != 0) return 1; return 0; }
int main(int argc, char *argv[]) { struct udev *udev; struct udev_event *event; struct udev_device *dev; struct udev_rules *rules; char syspath[UTIL_PATH_SIZE]; const char *devpath; const char *action; const char *subsystem; struct sigaction act; int err = -EINVAL; udev = udev_new(); if (udev == NULL) exit(1); info(udev, "version %s\n", VERSION); udev_selinux_init(udev); /* set signal handlers */ memset(&act, 0x00, sizeof(act)); act.sa_handler = (void (*)(int)) sig_handler; sigemptyset (&act.sa_mask); act.sa_flags = 0; sigaction(SIGALRM, &act, NULL); sigaction(SIGINT, &act, NULL); sigaction(SIGTERM, &act, NULL); /* trigger timeout to prevent hanging processes */ alarm(UDEV_EVENT_TIMEOUT); action = getenv("ACTION"); devpath = getenv("DEVPATH"); subsystem = getenv("SUBSYSTEM"); if (action == NULL || subsystem == NULL || devpath == NULL) { err(udev, "action, subsystem or devpath missing\n"); goto exit; } rules = udev_rules_new(udev, 1); util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath)); util_strlcat(syspath, devpath, sizeof(syspath)); dev = udev_device_new_from_syspath(udev, syspath); if (dev == NULL) { info(udev, "unknown device '%s'\n", devpath); goto fail; } /* skip reading of db, but read kernel parameters */ udev_device_set_info_loaded(dev); udev_device_read_uevent_file(dev); udev_device_set_action(dev, action); event = udev_event_new(dev); err = udev_event_execute_rules(event, rules); /* rules may change/disable the timeout */ if (udev_device_get_event_timeout(dev) >= 0) alarm(udev_device_get_event_timeout(dev)); if (err == 0 && !event->ignore_device && udev_get_run(udev)) udev_event_execute_run(event); udev_event_unref(event); udev_device_unref(dev); fail: udev_rules_unref(rules); exit: udev_selinux_exit(udev); udev_unref(udev); if (err != 0) return 1; return 0; }