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120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
/*
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* Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <errno.h>
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#include <signal.h>
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#include <unistd.h>
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#include <syslog.h>
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#include <grp.h>
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#include "udev.h"
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static void asmlinkage sig_handler(int signum)
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{
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switch (signum) {
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case SIGALRM:
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exit(1);
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case SIGINT:
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case SIGTERM:
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exit(20 + signum);
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}
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}
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int main(int argc, char *argv[])
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{
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struct udev *udev;
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struct udev_event *event;
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struct udev_device *dev;
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struct udev_rules *rules;
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char syspath[UTIL_PATH_SIZE];
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const char *devpath;
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const char *action;
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const char *subsystem;
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struct sigaction act;
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int err = -EINVAL;
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udev = udev_new();
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if (udev == NULL)
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exit(1);
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info(udev, "version %s\n", VERSION);
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udev_selinux_init(udev);
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/* set signal handlers */
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memset(&act, 0x00, sizeof(act));
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act.sa_handler = (void (*)(int)) sig_handler;
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sigemptyset (&act.sa_mask);
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act.sa_flags = 0;
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sigaction(SIGALRM, &act, NULL);
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sigaction(SIGINT, &act, NULL);
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sigaction(SIGTERM, &act, NULL);
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/* trigger timeout to prevent hanging processes */
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alarm(UDEV_EVENT_TIMEOUT);
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action = getenv("ACTION");
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devpath = getenv("DEVPATH");
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subsystem = getenv("SUBSYSTEM");
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if (action == NULL || subsystem == NULL || devpath == NULL) {
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err(udev, "action, subsystem or devpath missing\n");
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goto exit;
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}
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rules = udev_rules_new(udev, 0);
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util_strlcpy(syspath, udev_get_sys_path(udev), sizeof(syspath));
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util_strlcat(syspath, devpath, sizeof(syspath));
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dev = udev_device_new_from_syspath(udev, syspath);
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if (dev == NULL) {
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info(udev, "unknown device '%s'\n", devpath);
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goto fail;
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}
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/* skip reading of db, but read kernel parameters */
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udev_device_set_info_loaded(dev);
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udev_device_read_uevent_file(dev);
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udev_device_set_action(dev, action);
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event = udev_event_new(dev);
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err = udev_event_execute_rules(event, rules);
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/* rules may change/disable the timeout */
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if (udev_device_get_event_timeout(dev) >= 0)
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alarm(udev_device_get_event_timeout(dev));
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if (err == 0 && !event->ignore_device && udev_get_run(udev))
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udev_event_execute_run(event);
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udev_event_unref(event);
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udev_device_unref(dev);
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fail:
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udev_rules_unref(rules);
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exit:
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udev_selinux_exit(udev);
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udev_unref(udev);
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if (err != 0)
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return 1;
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return 0;
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}
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