[thirdparty/systemd.git] / udevstart.c

/*
 * udevstart.c
 *
 * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
 * Copyright (C) 2004 Kay Sievers <kay@vrfy.org>
 *
 * Quick and dirty way to populate a /dev with udev if your system
 * does not have access to a shell.  Based originally on a patch
 * from:
 *	Harald Hoyer <harald@redhat.com>
 *
 *	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 version 2 of the License.
 * 
 *	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, write to the Free Software Foundation, Inc.,
 *	675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <dirent.h>
#include <signal.h>
#include <syslog.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/types.h>

#include "udev.h"
#include "udev_rules.h"

static const char *udev_run_str;
static const char *udev_log_str;
static struct udev_rules rules;

#ifdef USE_LOG
void log_message(int priority, const char *format, ...)
{
	va_list args;

	if (priority > udev_log_priority)
		return;

	va_start(args, format);
	vsyslog(priority, format, args);
	va_end(args);
}
#endif

struct device {
	struct list_head node;
	char path[PATH_SIZE];
};

/* sort files in lexical order */
static int device_list_insert(const char *path, struct list_head *device_list)
{
	struct device *loop_device;
	struct device *new_device;
	const char *devpath = &path[strlen(sysfs_path)];

	dbg("insert: '%s'\n", devpath);

	list_for_each_entry(loop_device, device_list, node) {
		if (strcmp(loop_device->path, devpath) > 0) {
			break;
		}
	}

	new_device = malloc(sizeof(struct device));
	if (new_device == NULL) {
		dbg("error malloc");
		return -ENOMEM;
	}

	strlcpy(new_device->path, devpath, sizeof(new_device->path));
	list_add_tail(&new_device->node, &loop_device->node);
	dbg("add '%s'" , new_device->path);
	return 0;
}

/* list of devices that we should run last due to any one of a number of reasons */
static char *last_list[] = {
	"/block/dm",	/* on here because dm wants to have the block devices around before it */
	NULL,
};

/* list of devices that we should run first due to any one of a number of reasons */
static char *first_list[] = {
	"/class/mem",
	"/class/tty",
	NULL,
};

static int add_device(const char *devpath)
{
	struct sysfs_device *dev;
	struct udevice *udev;
	int retval = 0;

	/* clear and set environment for next event */
	clearenv();
	setenv("ACTION", "add", 1);
	setenv("UDEV_START", "1", 1);
	if (udev_log_str)
		setenv("UDEV_LOG", udev_log_str, 1);
	if (udev_run_str)
		setenv("UDEV_RUN", udev_run_str, 1);

	dev = sysfs_device_get(devpath);
	if (dev == NULL)
		return -1;

	udev = udev_device_init();
	if (udev == NULL)
		return -1;

	/* override built-in sysfs device */
	udev->dev = dev;
	strcpy(udev->action, "add");
	udev->devt = udev_device_get_devt(udev);

	if (strcmp(udev->dev->subsystem, "net") != 0) {
		udev->devt = udev_device_get_devt(udev);
		if (major(udev->devt) == 0)
			return -1;
	}

	dbg("add '%s'", udev->dev->devpath);
	setenv("DEVPATH", udev->dev->devpath, 1);
	setenv("SUBSYSTEM", udev->dev->subsystem, 1);

	udev_rules_get_name(&rules, udev);
	if (udev->ignore_device) {
		dbg("device event will be ignored");
		goto exit;
	}
	if (udev->name[0] != '\0')
		retval = udev_add_device(udev);
	else
		info("device node creation supressed");

	if (retval == 0 && udev_run) {
		struct name_entry *name_loop;

		dbg("executing run list");
		list_for_each_entry(name_loop, &udev->run_list, node) {
			if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
				pass_env_to_socket(&name_loop->name[strlen("socket:")], udev->dev->devpath, "add");
			else {
				char program[PATH_SIZE];

				strlcpy(program, name_loop->name, sizeof(program));
				udev_rules_apply_format(udev, program, sizeof(program));
				run_program(program, udev->dev->subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
			}
		}
	}

exit:
	udev_device_cleanup(udev);
	return 0;
}

static void exec_list(struct list_head *device_list)
{
	struct device *loop_device;
	struct device *tmp_device;
	int i;

	/* handle the "first" type devices first */
	list_for_each_entry_safe(loop_device, tmp_device, device_list, node) {
		for (i = 0; first_list[i] != NULL; i++) {
			if (strncmp(loop_device->path, first_list[i], strlen(first_list[i])) == 0) {
				add_device(loop_device->path);
				list_del(&loop_device->node);
				free(loop_device);
				break;
			}
		}
	}

	/* handle the devices we are allowed to, excluding the "last" type devices */
	list_for_each_entry_safe(loop_device, tmp_device, device_list, node) {
		int found = 0;
		for (i = 0; last_list[i] != NULL; i++) {
			if (strncmp(loop_device->path, last_list[i], strlen(last_list[i])) == 0) {
				found = 1;
				break;
			}
		}
		if (found)
			continue;

		add_device(loop_device->path);
		list_del(&loop_device->node);
		free(loop_device);
	}

	/* handle the rest of the devices left over, if any */
	list_for_each_entry_safe(loop_device, tmp_device, device_list, node) {
		add_device(loop_device->path);
		list_del(&loop_device->node);
		free(loop_device);
	}
}

static int has_devt(const char *path)
{
	char filename[PATH_SIZE];
	struct stat statbuf;

	snprintf(filename, sizeof(filename), "%s/dev", path);
	filename[sizeof(filename)-1] = '\0';

	if (stat(filename, &statbuf) == 0)
		return 1;

	return 0;
}

static void udev_scan_block(struct list_head *device_list)
{
	char base[PATH_SIZE];
	DIR *dir;
	struct dirent *dent;

	snprintf(base, sizeof(base), "%s/block", sysfs_path);
	base[sizeof(base)-1] = '\0';

	dir = opendir(base);
	if (dir != NULL) {
		for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
			char dirname[PATH_SIZE];
			DIR *dir2;
			struct dirent *dent2;

			if (dent->d_name[0] == '.')
				continue;

			snprintf(dirname, sizeof(dirname), "%s/%s", base, dent->d_name);
			dirname[sizeof(dirname)-1] = '\0';
			if (has_devt(dirname))
				device_list_insert(dirname, device_list);
			else
				continue;

			/* look for partitions */
			dir2 = opendir(dirname);
			if (dir2 != NULL) {
				for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
					char dirname2[PATH_SIZE];

					if (dent2->d_name[0] == '.')
						continue;

					snprintf(dirname2, sizeof(dirname2), "%s/%s", dirname, dent2->d_name);
					dirname2[sizeof(dirname2)-1] = '\0';

					if (has_devt(dirname2))
						device_list_insert(dirname2, device_list);
				}
				closedir(dir2);
			}
		}
		closedir(dir);
	}
}

static void udev_scan_class(struct list_head *device_list)
{
	char base[PATH_SIZE];
	DIR *dir;
	struct dirent *dent;

	snprintf(base, sizeof(base), "%s/class", sysfs_path);
	base[sizeof(base)-1] = '\0';

	dir = opendir(base);
	if (dir != NULL) {
		for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
			char dirname[PATH_SIZE];
			DIR *dir2;
			struct dirent *dent2;

			if (dent->d_name[0] == '.')
				continue;

			snprintf(dirname, sizeof(dirname), "%s/%s", base, dent->d_name);
			dirname[sizeof(dirname)-1] = '\0';

			dir2 = opendir(dirname);
			if (dir2 != NULL) {
				for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
					char dirname2[PATH_SIZE];

					if (dent2->d_name[0] == '.')
						continue;

					snprintf(dirname2, sizeof(dirname2), "%s/%s", dirname, dent2->d_name);
					dirname2[sizeof(dirname2)-1] = '\0';

					if (has_devt(dirname2) || strcmp(dent->d_name, "net") == 0)
						device_list_insert(dirname2, device_list);
				}
				closedir(dir2);
			}
		}
		closedir(dir);
	}
}

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[], char *envp[])
{
	LIST_HEAD(device_list);
	struct sigaction act;

	logging_init("udevstart");
	udev_config_init();
	dbg("version %s", UDEV_VERSION);

	udev_run_str = getenv("UDEV_RUN");
	udev_log_str = getenv("UDEV_LOG");

	/* disable all logging if not explicitely requested */
	if (udev_log_str == NULL)
		udev_log_priority = 0;

	/* 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_ALARM_TIMEOUT);

	sysfs_init();
	udev_rules_init(&rules, 1);

	udev_scan_class(&device_list);
	udev_scan_block(&device_list);
	exec_list(&device_list);

	udev_rules_cleanup(&rules);
	sysfs_cleanup();
	logging_close();
	return 0;
}
Commit	Line	Data
82b9a637 GKH	1	/*
	2	* udevstart.c
	3	*
	4	* Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
e8d569b4 KS	5	* Copyright (C) 2004 Kay Sievers <kay@vrfy.org>
e8d569b4 KS	6	*
82b9a637	7	* Quick and dirty way to populate a /dev with udev if your system
e8d569b4 KS	8	* does not have access to a shell. Based originally on a patch
	9	* from:
	10	* Harald Hoyer <harald@redhat.com>
82b9a637 GKH	11	*
	12	* This program is free software; you can redistribute it and/or modify it
	13	* under the terms of the GNU General Public License as published by the
	14	* Free Software Foundation version 2 of the License.
	15	*
	16	* This program is distributed in the hope that it will be useful, but
	17	* WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	19	* General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License along
	22	* with this program; if not, write to the Free Software Foundation, Inc.,
	23	* 675 Mass Ave, Cambridge, MA 02139, USA.
	24	*
	25	*/
	26
	27	#include <stdlib.h>
0e306d08	28	#include <stddef.h>
82b9a637 GKH	29	#include <string.h>
82b9a637 GKH	30	#include <stdio.h>
56a8a624	31	#include <unistd.h>
82b9a637 GKH	32	#include <errno.h>
82b9a637 GKH	33	#include <ctype.h>
82b9a637	34	#include <dirent.h>
56a8a624	35	#include <signal.h>
27f877e6	36	#include <syslog.h>
82b9a637	37	#include <sys/wait.h>
f22e9686	38	#include <sys/stat.h>
f27125f9	39	#include <sys/types.h>
82b9a637	40
63f61c5c	41	#include "udev.h"
e8d569b4	42	#include "udev_rules.h"
82b9a637	43
b8476286 KS	44	static const char *udev_run_str;
b8476286 KS	45	static const char *udev_log_str;
8bd41f36	46	static struct udev_rules rules;
b8476286	47
56a8a624	48	#ifdef USE_LOG
6b493a20	49	void log_message(int priority, const char *format, ...)
56a8a624	50	{
6b493a20 KS	51	va_list args;
	52
	53	if (priority > udev_log_priority)
	54	return;
	55
	56	va_start(args, format);
	57	vsyslog(priority, format, args);
	58	va_end(args);
56a8a624 KS	59	}
56a8a624 KS	60	#endif
82b9a637	61
0e306d08	62	struct device {
47241986	63	struct list_head node;
63f61c5c	64	char path[PATH_SIZE];
0e306d08 GKH	65	};
	66
	67	/* sort files in lexical order */
1aa1e248	68	static int device_list_insert(const char path, struct list_head device_list)
0e306d08 GKH	69	{
	70	struct device *loop_device;
	71	struct device *new_device;
7d38d228	72	const char *devpath = &path[strlen(sysfs_path)];
0e306d08	73
7d38d228	74	dbg("insert: '%s'\n", devpath);
f22e9686	75
47241986	76	list_for_each_entry(loop_device, device_list, node) {
7d38d228	77	if (strcmp(loop_device->path, devpath) > 0) {
0e306d08 GKH	78	break;
	79	}
	80	}
	81
	82	new_device = malloc(sizeof(struct device));
	83	if (new_device == NULL) {
	84	dbg("error malloc");
	85	return -ENOMEM;
	86	}
	87
7d38d228	88	strlcpy(new_device->path, devpath, sizeof(new_device->path));
47241986	89	list_add_tail(&new_device->node, &loop_device->node);
1aa1e248	90	dbg("add '%s'" , new_device->path);
0e306d08 GKH	91	return 0;
	92	}
	93
0e306d08 GKH	94	/* list of devices that we should run last due to any one of a number of reasons */
	95	static char *last_list[] = {
	96	"/block/dm", /* on here because dm wants to have the block devices around before it */
	97	NULL,
	98	};
	99
70f630f6 GKH	100	/* list of devices that we should run first due to any one of a number of reasons */
70f630f6 GKH	101	static char *first_list[] = {
7d38d228 KS	102	"/class/mem",
7d38d228 KS	103	"/class/tty",
70f630f6 GKH	104	NULL,
	105	};
	106
1aa1e248	107	static int add_device(const char *devpath)
f608f8ac	108	{
1aa1e248 KS	109	struct sysfs_device *dev;
1aa1e248 KS	110	struct udevice *udev;
4cfdeaf3	111	int retval = 0;
b8476286 KS	112
	113	/* clear and set environment for next event */
	114	clearenv();
	115	setenv("ACTION", "add", 1);
b8476286 KS	116	setenv("UDEV_START", "1", 1);
	117	if (udev_log_str)
	118	setenv("UDEV_LOG", udev_log_str, 1);
	119	if (udev_run_str)
	120	setenv("UDEV_RUN", udev_run_str, 1);
f22e9686	121
1aa1e248 KS	122	dev = sysfs_device_get(devpath);
1aa1e248 KS	123	if (dev == NULL)
c07669bd	124	return -1;
7a947ce5	125
1aa1e248 KS	126	udev = udev_device_init();
1aa1e248 KS	127	if (udev == NULL)
c07669bd	128	return -1;
1aa1e248 KS	129
	130	/* override built-in sysfs device */
	131	udev->dev = dev;
	132	strcpy(udev->action, "add");
	133	udev->devt = udev_device_get_devt(udev);
	134
	135	if (strcmp(udev->dev->subsystem, "net") != 0) {
	136	udev->devt = udev_device_get_devt(udev);
	137	if (major(udev->devt) == 0)
	138	return -1;
c07669bd	139	}
1aa1e248 KS	140
	141	dbg("add '%s'", udev->dev->devpath);
	142	setenv("DEVPATH", udev->dev->devpath, 1);
	143	setenv("SUBSYSTEM", udev->dev->subsystem, 1);
	144
	145	udev_rules_get_name(&rules, udev);
	146	if (udev->ignore_device) {
561d4c5a	147	dbg("device event will be ignored");
c07669bd KS	148	goto exit;
c07669bd KS	149	}
37854ffc KS	150	if (udev->name[0] != '\0')
37854ffc KS	151	retval = udev_add_device(udev);
f7ed0d11	152	else
37854ffc	153	info("device node creation supressed");
7a947ce5	154
f7ed0d11	155	if (retval == 0 && udev_run) {
821d0ec8 KS	156	struct name_entry *name_loop;
	157
	158	dbg("executing run list");
1aa1e248	159	list_for_each_entry(name_loop, &udev->run_list, node) {
d455b008	160	if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
1aa1e248	161	pass_env_to_socket(&name_loop->name[strlen("socket:")], udev->dev->devpath, "add");
f5f0c34f AB	162	else {
	163	char program[PATH_SIZE];
	164
	165	strlcpy(program, name_loop->name, sizeof(program));
a9bd2ed8	166	udev_rules_apply_format(udev, program, sizeof(program));
f5f0c34f AB	167	run_program(program, udev->dev->subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
f5f0c34f AB	168	}
d455b008	169	}
821d0ec8	170	}
37854ffc	171
c07669bd	172	exit:
1aa1e248	173	udev_device_cleanup(udev);
5d24c6ca	174	return 0;
f608f8ac KS	175	}
f608f8ac KS	176
0e306d08 GKH	177	static void exec_list(struct list_head *device_list)
	178	{
	179	struct device *loop_device;
	180	struct device *tmp_device;
70f630f6 GKH	181	int i;
	182
	183	/* handle the "first" type devices first */
47241986	184	list_for_each_entry_safe(loop_device, tmp_device, device_list, node) {
f22e9686	185	for (i = 0; first_list[i] != NULL; i++) {
70f630f6	186	if (strncmp(loop_device->path, first_list[i], strlen(first_list[i])) == 0) {
1aa1e248	187	add_device(loop_device->path);
47241986	188	list_del(&loop_device->node);
70f630f6 GKH	189	free(loop_device);
	190	break;
	191	}
	192	}
	193	}
0e306d08 GKH	194
0e306d08 GKH	195	/* handle the devices we are allowed to, excluding the "last" type devices */
47241986	196	list_for_each_entry_safe(loop_device, tmp_device, device_list, node) {
0e306d08	197	int found = 0;
f22e9686	198	for (i = 0; last_list[i] != NULL; i++) {
0e306d08 GKH	199	if (strncmp(loop_device->path, last_list[i], strlen(last_list[i])) == 0) {
	200	found = 1;
	201	break;
	202	}
	203	}
	204	if (found)
	205	continue;
	206
1aa1e248	207	add_device(loop_device->path);
47241986	208	list_del(&loop_device->node);
0e306d08 GKH	209	free(loop_device);
	210	}
	211
	212	/* handle the rest of the devices left over, if any */
47241986	213	list_for_each_entry_safe(loop_device, tmp_device, device_list, node) {
1aa1e248	214	add_device(loop_device->path);
47241986	215	list_del(&loop_device->node);
0e306d08 GKH	216	free(loop_device);
	217	}
	218	}
	219
7d38d228	220	static int has_devt(const char *path)
f22e9686	221	{
63f61c5c	222	char filename[PATH_SIZE];
f22e9686 KS	223	struct stat statbuf;
f22e9686 KS	224
7d38d228	225	snprintf(filename, sizeof(filename), "%s/dev", path);
63f61c5c	226	filename[sizeof(filename)-1] = '\0';
f22e9686 KS	227
	228	if (stat(filename, &statbuf) == 0)
	229	return 1;
	230
	231	return 0;
	232	}
	233
7d38d228	234	static void udev_scan_block(struct list_head *device_list)
82b9a637	235	{
63f61c5c	236	char base[PATH_SIZE];
e4dc0e11 KS	237	DIR *dir;
e4dc0e11 KS	238	struct dirent *dent;
82b9a637	239
63f61c5c KS	240	snprintf(base, sizeof(base), "%s/block", sysfs_path);
63f61c5c KS	241	base[sizeof(base)-1] = '\0';
f22e9686 KS	242
f22e9686 KS	243	dir = opendir(base);
e4dc0e11 KS	244	if (dir != NULL) {
e4dc0e11 KS	245	for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
63f61c5c	246	char dirname[PATH_SIZE];
e4dc0e11 KS	247	DIR *dir2;
	248	struct dirent *dent2;
	249
f22e9686	250	if (dent->d_name[0] == '.')
82b9a637 GKH	251	continue;
82b9a637 GKH	252
63f61c5c KS	253	snprintf(dirname, sizeof(dirname), "%s/%s", base, dent->d_name);
63f61c5c KS	254	dirname[sizeof(dirname)-1] = '\0';
f22e9686	255	if (has_devt(dirname))
1aa1e248	256	device_list_insert(dirname, device_list);
f22e9686 KS	257	else
f22e9686 KS	258	continue;
0e306d08	259
56a8a624	260	/* look for partitions */
82b9a637	261	dir2 = opendir(dirname);
e4dc0e11 KS	262	if (dir2 != NULL) {
e4dc0e11 KS	263	for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
63f61c5c	264	char dirname2[PATH_SIZE];
82b9a637	265
f22e9686	266	if (dent2->d_name[0] == '.')
82b9a637 GKH	267	continue;
82b9a637 GKH	268
63f61c5c KS	269	snprintf(dirname2, sizeof(dirname2), "%s/%s", dirname, dent2->d_name);
63f61c5c KS	270	dirname2[sizeof(dirname2)-1] = '\0';
f22e9686 KS	271
f22e9686 KS	272	if (has_devt(dirname2))
1aa1e248	273	device_list_insert(dirname2, device_list);
82b9a637	274	}
e13fa599	275	closedir(dir2);
82b9a637 GKH	276	}
82b9a637 GKH	277	}
e13fa599	278	closedir(dir);
82b9a637	279	}
0e306d08 GKH	280	}
0e306d08 GKH	281
7d38d228	282	static void udev_scan_class(struct list_head *device_list)
0e306d08	283	{
63f61c5c	284	char base[PATH_SIZE];
0e306d08 GKH	285	DIR *dir;
0e306d08 GKH	286	struct dirent *dent;
0e306d08	287
63f61c5c KS	288	snprintf(base, sizeof(base), "%s/class", sysfs_path);
63f61c5c KS	289	base[sizeof(base)-1] = '\0';
f22e9686 KS	290
f22e9686 KS	291	dir = opendir(base);
e4dc0e11 KS	292	if (dir != NULL) {
e4dc0e11 KS	293	for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
63f61c5c	294	char dirname[PATH_SIZE];
e4dc0e11 KS	295	DIR *dir2;
	296	struct dirent *dent2;
	297
f22e9686	298	if (dent->d_name[0] == '.')
82b9a637 GKH	299	continue;
82b9a637 GKH	300
63f61c5c KS	301	snprintf(dirname, sizeof(dirname), "%s/%s", base, dent->d_name);
63f61c5c KS	302	dirname[sizeof(dirname)-1] = '\0';
56a8a624	303
82b9a637	304	dir2 = opendir(dirname);
e4dc0e11 KS	305	if (dir2 != NULL) {
e4dc0e11 KS	306	for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
63f61c5c	307	char dirname2[PATH_SIZE];
82b9a637	308
f22e9686	309	if (dent2->d_name[0] == '.')
82b9a637 GKH	310	continue;
82b9a637 GKH	311
63f61c5c KS	312	snprintf(dirname2, sizeof(dirname2), "%s/%s", dirname, dent2->d_name);
63f61c5c KS	313	dirname2[sizeof(dirname2)-1] = '\0';
f22e9686	314
7fd0de49	315	if (has_devt(dirname2) \|\| strcmp(dent->d_name, "net") == 0)
1aa1e248	316	device_list_insert(dirname2, device_list);
82b9a637	317	}
e13fa599	318	closedir(dir2);
82b9a637 GKH	319	}
82b9a637 GKH	320	}
e13fa599	321	closedir(dir);
82b9a637	322	}
82b9a637 GKH	323	}
82b9a637 GKH	324
56a8a624	325	static void asmlinkage sig_handler(int signum)
82b9a637	326	{
56a8a624 KS	327	switch (signum) {
	328	case SIGALRM:
	329	exit(1);
	330	case SIGINT:
	331	case SIGTERM:
	332	exit(20 + signum);
	333	}
	334	}
	335
	336	int main(int argc, char argv[], char envp[])
	337	{
7d38d228	338	LIST_HEAD(device_list);
56a8a624 KS	339	struct sigaction act;
56a8a624 KS	340
66f74a2d	341	logging_init("udevstart");
1aa1e248	342	udev_config_init();
b8476286 KS	343	dbg("version %s", UDEV_VERSION);
	344
	345	udev_run_str = getenv("UDEV_RUN");
	346	udev_log_str = getenv("UDEV_LOG");
	347
6b493a20	348	/* disable all logging if not explicitely requested */
b8476286	349	if (udev_log_str == NULL)
6b493a20	350	udev_log_priority = 0;
56a8a624 KS	351
	352	/* set signal handlers */
	353	memset(&act, 0x00, sizeof(act));
	354	act.sa_handler = (void (*) (int))sig_handler;
	355	sigemptyset (&act.sa_mask);
	356	act.sa_flags = 0;
	357	sigaction(SIGALRM, &act, NULL);
	358	sigaction(SIGINT, &act, NULL);
	359	sigaction(SIGTERM, &act, NULL);
	360
	361	/* trigger timeout to prevent hanging processes */
8815afa1	362	alarm(UDEV_ALARM_TIMEOUT);
56a8a624	363
1aa1e248	364	sysfs_init();
287814b2	365	udev_rules_init(&rules, 1);
56a8a624	366
7d38d228 KS	367	udev_scan_class(&device_list);
	368	udev_scan_block(&device_list);
	369	exec_list(&device_list);
af4b05d4	370
1aa1e248 KS	371	udev_rules_cleanup(&rules);
1aa1e248 KS	372	sysfs_cleanup();
6b493a20	373	logging_close();
3f20eac0	374	return 0;
82b9a637	375	}