2 * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
3 * Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
34 #include "udev_rules.h"
36 static void asmlinkage sig_handler(int signum)
47 int main(int argc, char *argv[])
50 struct sysfs_device *dev;
51 struct udevice *udevice;
52 const char *maj, *min;
53 struct udev_rules rules;
56 const char *subsystem;
63 dbg(udev, "version %s\n", VERSION);
65 /* set signal handlers */
66 memset(&act, 0x00, sizeof(act));
67 act.sa_handler = (void (*)(int)) sig_handler;
68 sigemptyset (&act.sa_mask);
70 sigaction(SIGALRM, &act, NULL);
71 sigaction(SIGINT, &act, NULL);
72 sigaction(SIGTERM, &act, NULL);
74 /* trigger timeout to prevent hanging processes */
75 alarm(UDEV_EVENT_TIMEOUT);
77 action = getenv("ACTION");
78 devpath = getenv("DEVPATH");
79 subsystem = getenv("SUBSYSTEM");
80 /* older kernels passed the SUBSYSTEM only as argument */
81 if (subsystem == NULL && argc == 2)
84 if (action == NULL || subsystem == NULL || devpath == NULL) {
85 err(udev, "action, subsystem or devpath missing\n");
89 /* export log_priority , as called programs may want to do the same as udev */
90 if (udev_get_log_priority(udev) > 0) {
93 sprintf(priority, "%i", udev_get_log_priority(udev));
94 setenv("UDEV_LOG", priority, 1);
98 udev_rules_init(udev, &rules, 0);
100 dev = sysfs_device_get(udev, devpath);
102 info(udev, "unable to open '%s'\n", devpath);
106 udevice = udev_device_init(udev);
110 /* override built-in sysfs device */
112 strlcpy(udevice->action, action, sizeof(udevice->action));
114 /* get dev_t from environment, which is needed for "remove" to work, "add" works also from sysfs */
115 maj = getenv("MAJOR");
116 min = getenv("MINOR");
117 if (maj != NULL && min != NULL)
118 udevice->devt = makedev(atoi(maj), atoi(min));
120 udevice->devt = udev_device_get_devt(udevice);
122 retval = udev_device_event(&rules, udevice);
124 /* rules may change/disable the timeout */
125 if (udevice->event_timeout >= 0)
126 alarm(udevice->event_timeout);
128 if (retval == 0 && !udevice->ignore_device && udev_get_run(udev))
129 udev_rules_run(udevice);
131 udev_device_cleanup(udevice);
133 udev_rules_cleanup(&rules);