1 /* $OpenBSD: hotplugd.c,v 1.11 2009/06/26 01:06:04 kurt Exp $ */
3 * Copyright (c) 2004 Alexander Yurchenko <grange@openbsd.org>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 * Devices hot plugging daemon.
22 #include <sys/types.h>
23 #include <sys/device.h>
39 #define _PATH_DEV_HOTPLUG "/dev/hotplug"
40 #define _PATH_ETC_HOTPLUG "/etc/hotplug"
41 #define _PATH_ETC_HOTPLUG_ATTACH _PATH_ETC_HOTPLUG "/attach"
42 #define _PATH_ETC_HOTPLUG_DETACH _PATH_ETC_HOTPLUG "/detach"
43 #define _LOG_TAG "hotplugd"
44 #define _LOG_FACILITY LOG_DAEMON
45 #define _LOG_OPT (LOG_NDELAY | LOG_PID)
48 DV_DULL, /* generic, no special info */
49 DV_CPU, /* CPU (carries resource utilization) */
50 DV_DISK, /* disk drive (label, etc) */
51 DV_IFNET, /* network interface */
52 DV_TAPE, /* tape device */
53 DV_TTY /* serial line interface (???) */
56 extern char *__progname;
58 volatile sig_atomic_t quit = 0;
60 void exec_script(const char *, int, const char *);
63 __dead2 void usage(void);
66 main(int argc, char *argv[])
69 struct sigaction sact;
71 struct udev_enumerate *udev_enum;
72 struct udev_list_entry *udev_le, *udev_le_first;
73 struct udev_monitor *udev_monitor;
74 struct udev_device *udev_dev;
75 enum obsd_devclass devclass;
78 while ((ch = getopt(argc, argv, "?")) != -1)
95 bzero(&sact, sizeof(sact));
96 sigemptyset(&sact.sa_mask);
98 sact.sa_handler = sigquit;
99 sigaction(SIGINT, &sact, NULL);
100 sigaction(SIGQUIT, &sact, NULL);
101 sigaction(SIGTERM, &sact, NULL);
102 sact.sa_handler = SIG_IGN;
103 sigaction(SIGHUP, &sact, NULL);
104 sact.sa_handler = sigchild;
105 sact.sa_flags = SA_NOCLDSTOP;
106 sigaction(SIGCHLD, &sact, NULL);
108 openlog(_LOG_TAG, _LOG_OPT, _LOG_FACILITY);
110 if (daemon(0, 0) == -1)
113 syslog(LOG_INFO, "started");
115 udev_enum = udev_enumerate_new(udev);
116 if (udev_enum == NULL)
117 err(1, "udev_enumerate_new");
119 ret = udev_enumerate_scan_devices(udev_enum);
121 err(1, "udev_enumerate_scan_device ret = %d", ret);
123 udev_le_first = udev_enumerate_get_list_entry(udev_enum);
124 if (udev_le_first == NULL)
125 err(1, "udev_enumerate_get_list_entry error");
127 udev_list_entry_foreach(udev_le, udev_le_first) {
128 udev_dev = udev_list_entry_get_device(udev_le);
130 class = atoi(udev_device_get_property_value(udev_dev, "devtype"));
131 devclass = ((class == D_TTY) ? DV_TTY : ((class == D_TAPE) ? DV_TAPE : ((class == D_DISK) ? DV_DISK : DV_DULL)));
133 syslog(LOG_INFO, "%s attached, class %d",
134 udev_device_get_devnode(udev_dev), devclass);
135 exec_script(_PATH_ETC_HOTPLUG_ATTACH, devclass,
136 udev_device_get_devnode(udev_dev));
139 udev_enumerate_unref(udev_enum);
140 udev_monitor = udev_monitor_new(udev);
142 ret = udev_monitor_enable_receiving(udev_monitor);
144 err(1, "udev_monitor_enable_receiving ret = %d", ret);
147 if ((udev_dev = udev_monitor_receive_device(udev_monitor)) == NULL) {
148 syslog(LOG_ERR, "read: %m");
152 prop = udev_device_get_action(udev_dev);
153 class = atoi(udev_device_get_property_value(udev_dev, "devtype"));
154 devclass = ((class == D_TTY) ? DV_TTY : ((class == D_TAPE) ? DV_TAPE : ((class == D_DISK) ? DV_DISK : DV_DULL)));
156 if (strcmp(prop, "attach") == 0) {
157 syslog(LOG_INFO, "%s attached, class %d",
158 udev_device_get_devnode(udev_dev), devclass);
159 exec_script(_PATH_ETC_HOTPLUG_ATTACH, devclass,
160 udev_device_get_devnode(udev_dev));
161 } else if (strcmp(prop, "detach") == 0) {
162 syslog(LOG_INFO, "%s detached, class %d",
163 udev_device_get_devnode(udev_dev), devclass);
164 exec_script(_PATH_ETC_HOTPLUG_DETACH, devclass,
165 udev_device_get_devnode(udev_dev));
167 syslog(LOG_NOTICE, "unknown event (%s)", prop);
171 syslog(LOG_INFO, "terminated");
175 udev_monitor_unref(udev_monitor);
182 exec_script(const char *file, int class, const char *name)
187 snprintf(strclass, sizeof(strclass), "%d", class);
189 if (access(file, X_OK | R_OK)) {
190 syslog(LOG_ERR, "could not access %s", file);
194 if ((pid = fork()) == -1) {
195 syslog(LOG_ERR, "fork: %m");
200 execl(file, basename(file), strclass, name, NULL);
201 syslog(LOG_ERR, "execl %s: %m", file);
209 sigchild(int signum __unused)
211 int saved_errno, status;
216 while ((pid = waitpid(WAIT_ANY, &status, WNOHANG)) != 0) {
222 syslog(LOG_ERR, "waitpid: %m");
226 if (WIFEXITED(status)) {
227 if (WEXITSTATUS(status) != 0) {
229 syslog(LOG_NOTICE, "child exit status: %d",
230 WEXITSTATUS(status));
234 syslog(LOG_NOTICE, "child is terminated abnormally");
243 sigquit(int signum __unused)
251 fprintf(stderr, "usage: %s [-d device]\n", __progname);