/* * Copyright (C) 2003-2004 Greg Kroah-Hartman * Copyright (C) 2004-2008 Kay Sievers * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include #include #include #include #include #include #include #include #include #include #include #include "udev.h" #include "udev_rules.h" static void asmlinkage sig_handler(int signum) { switch (signum) { case SIGALRM: exit(1); case SIGINT: case SIGTERM: exit(20 + signum); } } 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); 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; } udev_rules_init(udev, &rules, 0); 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_run(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_rules_run(event); udev_event_unref(event); udev_device_unref(dev); fail: udev_rules_cleanup(&rules); exit: selinux_exit(udev); udev_unref(udev); if (err != 0) return 1; return 0; }