4 * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
5 * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation version 2 of the License.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 675 Mass Ave, Cambridge, MA 02139, USA.
33 #include "libsysfs/sysfs/libsysfs.h"
34 #include "udev_libc_wrapper.h"
36 #include "udev_utils.h"
37 #include "udev_sysfs.h"
38 #include "udev_version.h"
39 #include "udev_rules.h"
43 void log_message(int priority, const char *format, ...)
47 if (priority > udev_log_priority)
50 va_start(args, format);
51 vsyslog(priority, format, args);
56 static void asmlinkage sig_handler(int signum)
67 int main(int argc, char *argv[], char *envp[])
70 struct udev_rules rules;
73 const char *subsystem;
78 if (argc == 2 && strcmp(argv[1], "-V") == 0) {
79 printf("%s\n", UDEV_VERSION);
83 /* set std fd's to /dev/null, if the kernel forks us, we don't have them at all */
84 devnull = open("/dev/null", O_RDWR);
86 if (devnull != STDIN_FILENO)
87 dup2(devnull, STDIN_FILENO);
88 if (devnull != STDOUT_FILENO)
89 dup2(devnull, STDOUT_FILENO);
90 if (devnull != STDERR_FILENO)
91 dup2(devnull, STDERR_FILENO);
92 if (devnull > STDERR_FILENO)
98 err("fatal, could not open /dev/null");
100 dbg("version %s", UDEV_VERSION);
102 /* set signal handlers */
103 memset(&act, 0x00, sizeof(act));
104 act.sa_handler = (void (*)(int)) sig_handler;
105 sigemptyset (&act.sa_mask);
107 sigaction(SIGALRM, &act, NULL);
108 sigaction(SIGINT, &act, NULL);
109 sigaction(SIGTERM, &act, NULL);
111 /* trigger timeout to prevent hanging processes */
112 alarm(UDEV_ALARM_TIMEOUT);
114 action = getenv("ACTION");
115 devpath = getenv("DEVPATH");
116 subsystem = getenv("SUBSYSTEM");
117 /* older kernels passed the SUBSYSTEM only as argument */
118 if (!subsystem && argc == 2)
121 if (!action || !subsystem || !devpath) {
122 err("action, subsystem or devpath missing");
126 /* export log_priority , as called programs may want to do the same as udev */
127 if (udev_log_priority) {
130 sprintf(priority, "%i", udev_log_priority);
131 setenv("UDEV_LOG", priority, 1);
134 udev_init_device(&udev, devpath, subsystem, action);
135 udev_rules_init(&rules, 1, 0);
137 retval = udev_process_event(&rules, &udev);
139 if (!retval && udev_run && !list_empty(&udev.run_list)) {
140 struct name_entry *name_loop;
142 dbg("executing run list");
143 list_for_each_entry(name_loop, &udev.run_list, node) {
144 if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
145 pass_env_to_socket(&name_loop->name[strlen("socket:")], devpath, action);
147 run_program(name_loop->name, udev.subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
151 udev_rules_close(&rules);
152 udev_cleanup_device(&udev);