[thirdparty/systemd.git] / udev-add.c

/*
 * udev-add.c
 *
 * Userspace devfs
 *
 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.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 <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <grp.h>
#include <net/if.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/sockios.h>
#ifndef __KLIBC__
#include <pwd.h>
#include <utmp.h>
#endif

#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
#include "udev_lib.h"
#include "udev_version.h"
#include "logging.h"
#include "namedev.h"
#include "udevdb.h"
#include "klibc_fixups.h"

#define LOCAL_USER "$local"

#include "selinux.h"

/* 
 * Right now the major/minor of a device is stored in a file called
 * "dev" in sysfs.
 * The number is stored as:
 * 	MM:mm
 * 		MM is the major
 * 		mm is the minor
 * 		The value is in decimal.
 */
static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice *udev)
{
	struct sysfs_attribute *attr = NULL;

	attr = sysfs_get_classdev_attr(class_dev, "dev");
	if (attr == NULL)
		goto error;
	dbg("dev='%s'", attr->value);

	if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2)
		goto error;
	dbg("found major=%d, minor=%d", udev->major, udev->minor);

	return 0;
error:
	return -1;
}

static int create_path(char *file)
{
	char p[NAME_SIZE];
	char *pos;
	int retval;
	struct stat stats;
	
	strfieldcpy(p, file);
	pos = strchr(p+1, '/');
	while (1) {
		pos = strchr(pos+1, '/');
		if (pos == NULL)
			break;
		*pos = 0x00;
		if (stat(p, &stats)) {
			selinux_setfscreatecon(p, S_IFDIR);
			retval = mkdir(p, 0755);
			if (retval != 0) {
				dbg("mkdir(%s) failed with error '%s'",
				    p, strerror(errno));
				return retval;
			}
			dbg("created '%s'", p);
		} else {
			selinux_setfilecon(p, S_IFDIR);
		}
		*pos = '/';
	}
	return 0;
}

static int make_node(char *file, int major, int minor, unsigned int mode, uid_t uid, gid_t gid)
{
	struct stat stats;
	int retval = 0;

	if (stat(file, &stats) != 0)
		goto create;

	/* preserve node with already correct numbers, to not change the inode number */
	if (((stats.st_mode & S_IFMT) == S_IFBLK || (stats.st_mode & S_IFMT) == S_IFCHR) &&
	    (stats.st_rdev == makedev(major, minor))) {
		dbg("preserve file '%s', cause it has correct dev_t", file);
		selinux_setfilecon(file,stats.st_mode);
		goto perms;
	}

	if (unlink(file) != 0)
		dbg("unlink(%s) failed with error '%s'", file, strerror(errno));
	else
		dbg("already present file '%s' unlinked", file);

create:
	selinux_setfscreatecon(file, mode);
	retval = mknod(file, mode, makedev(major, minor));
	if (retval != 0) {
		dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
		    file, mode, major, minor, strerror(errno));
		goto exit;
	}

perms:
	dbg("chmod(%s, %#o)", file, mode);
	if (chmod(file, mode) != 0) {
		dbg("chmod(%s, %#o) failed with error '%s'", file, mode, strerror(errno));
		goto exit;
	}

	if (uid != 0 || gid != 0) {
		dbg("chown(%s, %u, %u)", file, uid, gid);
		if (chown(file, uid, gid) != 0) {
			dbg("chown(%s, %u, %u) failed with error '%s'",
			    file, uid, gid, strerror(errno));
			goto exit;
		}
	}

exit:
	return retval;
}

/* get the local logged in user */
static void set_to_local_user(char *user)
{
	struct utmp *u;
	time_t recent = 0;

	strfieldcpymax(user, default_owner_str, OWNER_SIZE);
	setutent();
	while (1) {
		u = getutent();
		if (u == NULL)
			break;

		/* is this a user login ? */
		if (u->ut_type != USER_PROCESS)
			continue;

		/* is this a local login ? */
		if (strcmp(u->ut_host, ""))
			continue;

		if (u->ut_time > recent) {
			recent = u->ut_time;
			strfieldcpymax(user, u->ut_user, OWNER_SIZE);
			dbg("local user is '%s'", user);
			break;
		}
	}
	endutent();
}

static int create_node(struct udevice *dev, int fake)
{
	char filename[NAME_SIZE];
	char linkname[NAME_SIZE];
	char linktarget[NAME_SIZE];
	char partitionname[NAME_SIZE];
	uid_t uid = 0;
	gid_t gid = 0;
	int i;
	int tail;
	char *pos;
	int len;

	strfieldcpy(filename, udev_root);
	strfieldcat(filename, dev->name);

	switch (dev->type) {
	case 'b':
		dev->mode |= S_IFBLK;
		break;
	case 'c':
	case 'u':
		dev->mode |= S_IFCHR;
		break;
	case 'p':
		dev->mode |= S_IFIFO;
		break;
	default:
		dbg("unknown node type %c\n", dev->type);
		return -EINVAL;
	}

	/* create parent directories if needed */
	if (strrchr(dev->name, '/'))
		create_path(filename);

	if (dev->owner[0] != '\0') {
		char *endptr;
		unsigned long id = strtoul(dev->owner, &endptr, 10);
		if (endptr[0] == '\0')
			uid = (uid_t) id;
		else {
			struct passwd *pw;
			if (strncmp(dev->owner, LOCAL_USER, sizeof(LOCAL_USER)) == 0)
				set_to_local_user(dev->owner);

			pw = getpwnam(dev->owner);
			if (pw == NULL)
				dbg("specified user unknown '%s'", dev->owner);
			else
				uid = pw->pw_uid;
		}
	}

	if (dev->group[0] != '\0') {
		char *endptr;
		unsigned long id = strtoul(dev->group, &endptr, 10);
		if (endptr[0] == '\0')
			gid = (gid_t) id;
		else {
			struct group *gr = getgrnam(dev->group);
			if (gr == NULL)
				dbg("specified group unknown '%s'", dev->group);
			else
				gid = gr->gr_gid;
		}
	}

	if (!fake) {
		info("creating device node '%s'", filename);
		if (make_node(filename, dev->major, dev->minor, dev->mode, uid, gid) != 0)
			goto error;
	} else {
		info("creating device node '%s', major = '%d', minor = '%d', "
		     "mode = '%#o', uid = '%d', gid = '%d'", filename,
		     dev->major, dev->minor, (mode_t)dev->mode, uid, gid);
	}

	/* create all_partitions if requested */
	if (dev->partitions > 0) {
		info("creating device partition nodes '%s[1-%i]'", filename, dev->partitions);
		if (!fake) {
			for (i = 1; i <= dev->partitions; i++) {
				strfieldcpy(partitionname, filename);
				strintcat(partitionname, i);
				make_node(partitionname, dev->major,
					  dev->minor + i, dev->mode, uid, gid);
			}
		}
	}

	/* create symlink(s) if requested */
	foreach_strpart(dev->symlink, " ", pos, len) {
		strfieldcpymax(linkname, pos, len+1);
		strfieldcpy(filename, udev_root);
		strfieldcat(filename, linkname);
		dbg("symlink '%s' to node '%s' requested", filename, dev->name);
		if (!fake)
			if (strrchr(linkname, '/'))
				create_path(filename);

		/* optimize relative link */
		linktarget[0] = '\0';
		i = 0;
		tail = 0;
		while ((dev->name[i] == linkname[i]) && dev->name[i]) {
			if (dev->name[i] == '/')
				tail = i+1;
			i++;
		}
		while (linkname[i] != '\0') {
			if (linkname[i] == '/')
				strfieldcat(linktarget, "../");
			i++;
		}

		strfieldcat(linktarget, &dev->name[tail]);

		dbg("symlink(%s, %s)", linktarget, filename);
		if (!fake) {
			selinux_setfscreatecon(filename, S_IFLNK);
			unlink(filename);
			if (symlink(linktarget, filename) != 0)
				dbg("symlink(%s, %s) failed with error '%s'",
				    linktarget, filename, strerror(errno));
		}
	}

	return 0;
error:
	return -1;
}

static struct sysfs_class_device *get_class_dev(const char *device_name)
{
	char dev_path[SYSFS_PATH_MAX];
	struct sysfs_class_device *class_dev = NULL;

	strfieldcpy(dev_path, sysfs_path);
	strfieldcat(dev_path, device_name);
	dbg("looking at '%s'", dev_path);

	/* open up the sysfs class device for this thing... */
	class_dev = sysfs_open_class_device_path(dev_path);
	if (class_dev == NULL) {
		dbg ("sysfs_open_class_device_path failed");
		goto exit;
	}
	dbg("class_dev->name='%s'", class_dev->name);

exit:
	return class_dev;
}

/* wait for the "dev" file to show up in the directory in sysfs.
 * If it doesn't happen in about 10 seconds, give up.
 */
#define SECONDS_TO_WAIT_FOR_FILE	10
static int sleep_for_file(const char *path, char* file)
{
	char filename[SYSFS_PATH_MAX + 6];
	int loop = SECONDS_TO_WAIT_FOR_FILE;
	int retval;

	strfieldcpy(filename, sysfs_path);
	strfieldcat(filename, path);
	strfieldcat(filename, file);

	while (loop--) {
		struct stat buf;

		dbg("looking for '%s'", filename);
		retval = stat(filename, &buf);
		if (retval == 0)
			goto exit;

		/* sleep to give the kernel a chance to create the dev file */
		sleep(1);
	}
	retval = -ENODEV;
exit:
	return retval;
}

static int rename_net_if(struct udevice *dev, int fake)
{
	int sk;
	struct ifreq ifr;
	int retval;

	dbg("changing net interface name from '%s' to '%s'", dev->kernel_name, dev->name);
	if (fake)
		return 0;

	sk = socket(PF_INET, SOCK_DGRAM, 0);
	if (sk < 0) {
		dbg("error opening socket");
		return -1;
	}

	memset(&ifr, 0x00, sizeof(struct ifreq));
	strfieldcpy(ifr.ifr_name, dev->kernel_name);
	strfieldcpy(ifr.ifr_newname, dev->name);

	retval = ioctl(sk, SIOCSIFNAME, &ifr);
	if (retval != 0)
		dbg("error changing net interface name");
	close(sk);

	return retval;
}

int udev_add_device(const char *path, const char *subsystem, int fake)
{
	struct sysfs_class_device *class_dev;
	struct udevice dev;
	char devpath[DEVPATH_SIZE];
	char *pos;
	int retval;

	memset(&dev, 0x00, sizeof(dev));

	dev.type = get_device_type(path, subsystem);
	switch (dev.type) {
	case 'b':
	case 'c':
		retval = sleep_for_file(path, "/dev");
		break;

	case 'n':
		retval = sleep_for_file(path, "/address");
		break;

	default:
		dbg("unknown device type '%c'", dev.type);
		return -1;
	}

	class_dev = get_class_dev(path);
	if (class_dev == NULL)
		return -1;

	if (dev.type == 'b' || dev.type == 'c') {
		retval = get_major_minor(class_dev, &dev);
		if (retval != 0) {
			dbg("get_major_minor failed");
			goto exit;
		}
	}

	if (namedev_name_device(class_dev, &dev) != 0)
		goto exit;

	dbg("name='%s'", dev.name);

	selinux_init();
	switch (dev.type) {
	case 'b':
	case 'c':
		retval = create_node(&dev, fake);
		if (retval != 0)
			goto exit;
		if ((!fake) && (udevdb_add_dev(path, &dev) != 0))
			dbg("udevdb_add_dev failed, but we are going to try "
			    "to create the node anyway. But remove might not "
			    "work properly for this device.");

		dev_d_send(&dev, subsystem, path);
		break;

	case 'n':
		strfieldcpy(devpath, path);
		if (strcmp(dev.name, dev.kernel_name) != 0) {
			retval = rename_net_if(&dev, fake);
			if (retval != 0)
				goto exit;
			/* netif's are keyed with the configured name, cause
			 * the original kernel name sleeps with the fishes
			 */
			pos = strrchr(devpath, '/');
			if (pos != NULL) {
				pos[1] = '\0';
				strfieldcat(devpath, dev.name);
			}
		}
		if ((!fake) && (udevdb_add_dev(devpath, &dev) != 0))
			dbg("udevdb_add_dev failed");

		dev_d_send(&dev, subsystem, devpath);
		break;
	}

exit:
	selinux_restore();
	sysfs_close_class_device(class_dev);

	return retval;
}
Commit	Line	Data
ea733a2f GKH	1	/*
	2	* udev-add.c
	3	*
	4	* Userspace devfs
	5	*
	6	* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
	7	*
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation version 2 of the License.
	12	*
	13	* This program is distributed in the hope that it will be useful, but
	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License along
	19	* with this program; if not, write to the Free Software Foundation, Inc.,
	20	* 675 Mass Ave, Cambridge, MA 02139, USA.
	21	*
	22	*/
	23
	24	#include <stdlib.h>
	25	#include <string.h>
	26	#include <stdio.h>
	27	#include <fcntl.h>
	28	#include <unistd.h>
	29	#include <errno.h>
32ff5bca	30	#include <sys/stat.h>
10950dfe GKH	31	#include <sys/types.h>
10950dfe GKH	32	#include <grp.h>
f61d732a KS	33	#include <net/if.h>
	34	#include <sys/socket.h>
	35	#include <sys/ioctl.h>
	36	#include <linux/sockios.h>
10950dfe GKH	37	#ifndef __KLIBC__
10950dfe GKH	38	#include <pwd.h>
534c853d	39	#include <utmp.h>
10950dfe	40	#endif
ea733a2f	41
c80da508	42	#include "libsysfs/sysfs/libsysfs.h"
ea733a2f	43	#include "udev.h"
c81b35c0	44	#include "udev_lib.h"
ea733a2f	45	#include "udev_version.h"
54988802	46	#include "logging.h"
ea733a2f	47	#include "namedev.h"
8e41d35d	48	#include "udevdb.h"
10950dfe	49	#include "klibc_fixups.h"
ea733a2f	50
534c853d KS	51	#define LOCAL_USER "$local"
534c853d KS	52
9825617b HH	53	#include "selinux.h"
9825617b HH	54
ea733a2f GKH	55	/*
	56	* Right now the major/minor of a device is stored in a file called
	57	* "dev" in sysfs.
	58	* The number is stored as:
727d1ba5	59	* MM:mm
ea733a2f GKH	60	* MM is the major
ea733a2f GKH	61	* mm is the minor
727d1ba5	62	* The value is in decimal.
ea733a2f	63	*/
30defadd	64	static int get_major_minor(struct sysfs_class_device class_dev, struct udevice udev)
ea733a2f	65	{
5d4754f1	66	struct sysfs_attribute *attr = NULL;
ea733a2f	67
5d4754f1 DS	68	attr = sysfs_get_classdev_attr(class_dev, "dev");
5d4754f1 DS	69	if (attr == NULL)
bbbe503e	70	goto error;
5d4754f1	71	dbg("dev='%s'", attr->value);
ea733a2f	72
5d4754f1	73	if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2)
bbbe503e	74	goto error;
f7b4eca4	75	dbg("found major=%d, minor=%d", udev->major, udev->minor);
ea733a2f	76
bbbe503e KS	77	return 0;
	78	error:
	79	return -1;
ea733a2f GKH	80	}
ea733a2f GKH	81
3d150dfb KS	82	static int create_path(char *file)
	83	{
	84	char p[NAME_SIZE];
	85	char *pos;
	86	int retval;
	87	struct stat stats;
	88
c472e3c8	89	strfieldcpy(p, file);
3d150dfb KS	90	pos = strchr(p+1, '/');
	91	while (1) {
	92	pos = strchr(pos+1, '/');
	93	if (pos == NULL)
	94	break;
	95	*pos = 0x00;
	96	if (stat(p, &stats)) {
9825617b	97	selinux_setfscreatecon(p, S_IFDIR);
3d150dfb	98	retval = mkdir(p, 0755);
c5118442	99	if (retval != 0) {
3d150dfb KS	100	dbg("mkdir(%s) failed with error '%s'",
	101	p, strerror(errno));
	102	return retval;
	103	}
	104	dbg("created '%s'", p);
9825617b HH	105	} else {
9825617b HH	106	selinux_setfilecon(p, S_IFDIR);
3d150dfb KS	107	}
	108	*pos = '/';
	109	}
	110	return 0;
	111	}
	112
49747bdc	113	static int make_node(char *file, int major, int minor, unsigned int mode, uid_t uid, gid_t gid)
50e5de03	114	{
49747bdc KS	115	struct stat stats;
	116	int retval = 0;
	117
	118	if (stat(file, &stats) != 0)
	119	goto create;
	120
	121	/* preserve node with already correct numbers, to not change the inode number */
	122	if (((stats.st_mode & S_IFMT) == S_IFBLK \|\| (stats.st_mode & S_IFMT) == S_IFCHR) &&
	123	(stats.st_rdev == makedev(major, minor))) {
	124	dbg("preserve file '%s', cause it has correct dev_t", file);
9825617b	125	selinux_setfilecon(file,stats.st_mode);
49747bdc KS	126	goto perms;
	127	}
	128
	129	if (unlink(file) != 0)
	130	dbg("unlink(%s) failed with error '%s'", file, strerror(errno));
	131	else
	132	dbg("already present file '%s' unlinked", file);
50e5de03	133
49747bdc	134	create:
9825617b	135	selinux_setfscreatecon(file, mode);
49747bdc	136	retval = mknod(file, mode, makedev(major, minor));
50e5de03 KS	137	if (retval != 0) {
50e5de03 KS	138	dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
49747bdc	139	file, mode, major, minor, strerror(errno));
bbbe503e	140	goto exit;
50e5de03 KS	141	}
50e5de03 KS	142
49747bdc KS	143	perms:
	144	dbg("chmod(%s, %#o)", file, mode);
	145	if (chmod(file, mode) != 0) {
	146	dbg("chmod(%s, %#o) failed with error '%s'", file, mode, strerror(errno));
bbbe503e	147	goto exit;
50e5de03 KS	148	}
	149
	150	if (uid != 0 \|\| gid != 0) {
49747bdc KS	151	dbg("chown(%s, %u, %u)", file, uid, gid);
49747bdc KS	152	if (chown(file, uid, gid) != 0) {
50e5de03	153	dbg("chown(%s, %u, %u) failed with error '%s'",
49747bdc	154	file, uid, gid, strerror(errno));
bbbe503e	155	goto exit;
50e5de03 KS	156	}
	157	}
	158
bbbe503e KS	159	exit:
bbbe503e KS	160	return retval;
50e5de03 KS	161	}
50e5de03 KS	162
534c853d KS	163	/* get the local logged in user */
	164	static void set_to_local_user(char *user)
	165	{
	166	struct utmp *u;
	167	time_t recent = 0;
	168
17794d77	169	strfieldcpymax(user, default_owner_str, OWNER_SIZE);
534c853d KS	170	setutent();
	171	while (1) {
	172	u = getutent();
	173	if (u == NULL)
	174	break;
	175
	176	/* is this a user login ? */
	177	if (u->ut_type != USER_PROCESS)
	178	continue;
	179
	180	/* is this a local login ? */
	181	if (strcmp(u->ut_host, ""))
	182	continue;
	183
	184	if (u->ut_time > recent) {
	185	recent = u->ut_time;
17794d77	186	strfieldcpymax(user, u->ut_user, OWNER_SIZE);
534c853d KS	187	dbg("local user is '%s'", user);
	188	break;
	189	}
	190	}
	191	endutent();
	192	}
	193
97853b4f GKH	194	static int create_node(struct udevice *dev, int fake)
97853b4f GKH	195	{
9fe3f9a9 KS	196	char filename[NAME_SIZE];
	197	char linkname[NAME_SIZE];
	198	char linktarget[NAME_SIZE];
	199	char partitionname[NAME_SIZE];
e308ebb7 GKH	200	uid_t uid = 0;
e308ebb7 GKH	201	gid_t gid = 0;
3d150dfb KS	202	int i;
3d150dfb KS	203	int tail;
ef672b3d KS	204	char *pos;
ef672b3d KS	205	int len;
3d150dfb	206
c472e3c8 KS	207	strfieldcpy(filename, udev_root);
c472e3c8 KS	208	strfieldcat(filename, dev->name);
5840bc63 GKH	209
5840bc63 GKH	210	switch (dev->type) {
1331c889	211	case 'b':
5840bc63	212	dev->mode \|= S_IFBLK;
1331c889 GKH	213	break;
	214	case 'c':
	215	case 'u':
5840bc63	216	dev->mode \|= S_IFCHR;
1331c889 GKH	217	break;
1331c889 GKH	218	case 'p':
5840bc63	219	dev->mode \|= S_IFIFO;
1331c889 GKH	220	break;
1331c889 GKH	221	default:
5840bc63	222	dbg("unknown node type %c\n", dev->type);
1331c889 GKH	223	return -EINVAL;
1331c889 GKH	224	}
0abf54fc	225
3d150dfb KS	226	/* create parent directories if needed */
	227	if (strrchr(dev->name, '/'))
	228	create_path(filename);
218eae87	229
c5118442	230	if (dev->owner[0] != '\0') {
c19a6b30 KS	231	char *endptr;
c19a6b30 KS	232	unsigned long id = strtoul(dev->owner, &endptr, 10);
765cbd97	233	if (endptr[0] == '\0')
c19a6b30	234	uid = (uid_t) id;
10950dfe	235	else {
5895eb31	236	struct passwd *pw;
534c853d KS	237	if (strncmp(dev->owner, LOCAL_USER, sizeof(LOCAL_USER)) == 0)
	238	set_to_local_user(dev->owner);
	239
5895eb31	240	pw = getpwnam(dev->owner);
765cbd97 KS	241	if (pw == NULL)
765cbd97 KS	242	dbg("specified user unknown '%s'", dev->owner);
10950dfe GKH	243	else
	244	uid = pw->pw_uid;
	245	}
c19a6b30 KS	246	}
c19a6b30 KS	247
c5118442	248	if (dev->group[0] != '\0') {
c19a6b30 KS	249	char *endptr;
c19a6b30 KS	250	unsigned long id = strtoul(dev->group, &endptr, 10);
765cbd97	251	if (endptr[0] == '\0')
c19a6b30	252	gid = (gid_t) id;
10950dfe GKH	253	else {
10950dfe GKH	254	struct group *gr = getgrnam(dev->group);
765cbd97 KS	255	if (gr == NULL)
765cbd97 KS	256	dbg("specified group unknown '%s'", dev->group);
10950dfe GKH	257	else
	258	gid = gr->gr_gid;
	259	}
c19a6b30 KS	260	}
c19a6b30 KS	261
ab2e5bd9	262	if (!fake) {
50e5de03	263	info("creating device node '%s'", filename);
bbbe503e KS	264	if (make_node(filename, dev->major, dev->minor, dev->mode, uid, gid) != 0)
bbbe503e KS	265	goto error;
ab2e5bd9 GKH	266	} else {
	267	info("creating device node '%s', major = '%d', minor = '%d', "
	268	"mode = '%#o', uid = '%d', gid = '%d'", filename,
	269	dev->major, dev->minor, (mode_t)dev->mode, uid, gid);
	270	}
50e5de03	271
bbbe503e	272	/* create all_partitions if requested */
50e5de03 KS	273	if (dev->partitions > 0) {
50e5de03 KS	274	info("creating device partition nodes '%s[1-%i]'", filename, dev->partitions);
ab2e5bd9 GKH	275	if (!fake) {
ab2e5bd9 GKH	276	for (i = 1; i <= dev->partitions; i++) {
c58e36c0 KS	277	strfieldcpy(partitionname, filename);
c58e36c0 KS	278	strintcat(partitionname, i);
ab2e5bd9 GKH	279	make_node(partitionname, dev->major,
	280	dev->minor + i, dev->mode, uid, gid);
	281	}
50e5de03	282	}
3d150dfb KS	283	}
3d150dfb KS	284
bbbe503e	285	/* create symlink(s) if requested */
9fe3f9a9	286	foreach_strpart(dev->symlink, " ", pos, len) {
17794d77	287	strfieldcpymax(linkname, pos, len+1);
9fe3f9a9 KS	288	strfieldcpy(filename, udev_root);
	289	strfieldcat(filename, linkname);
	290	dbg("symlink '%s' to node '%s' requested", filename, dev->name);
	291	if (!fake)
	292	if (strrchr(linkname, '/'))
	293	create_path(filename);
	294
	295	/* optimize relative link */
	296	linktarget[0] = '\0';
	297	i = 0;
	298	tail = 0;
	299	while ((dev->name[i] == linkname[i]) && dev->name[i]) {
	300	if (dev->name[i] == '/')
	301	tail = i+1;
	302	i++;
	303	}
	304	while (linkname[i] != '\0') {
	305	if (linkname[i] == '/')
	306	strfieldcat(linktarget, "../");
	307	i++;
	308	}
3d150dfb	309
9fe3f9a9	310	strfieldcat(linktarget, &dev->name[tail]);
3d150dfb	311
9fe3f9a9 KS	312	dbg("symlink(%s, %s)", linktarget, filename);
9fe3f9a9 KS	313	if (!fake) {
9825617b	314	selinux_setfscreatecon(filename, S_IFLNK);
49747bdc	315	unlink(filename);
bbbe503e	316	if (symlink(linktarget, filename) != 0)
9fe3f9a9 KS	317	dbg("symlink(%s, %s) failed with error '%s'",
9fe3f9a9 KS	318	linktarget, filename, strerror(errno));
4763256c	319	}
c19a6b30 KS	320	}
c19a6b30 KS	321
bbbe503e KS	322	return 0;
	323	error:
	324	return -1;
ea733a2f GKH	325	}
ea733a2f GKH	326
eb6c7cd0	327	static struct sysfs_class_device get_class_dev(const char device_name)
ea733a2f GKH	328	{
ea733a2f GKH	329	char dev_path[SYSFS_PATH_MAX];
63dde9f8 GKH	330	struct sysfs_class_device *class_dev = NULL;
63dde9f8 GKH	331
c472e3c8 KS	332	strfieldcpy(dev_path, sysfs_path);
c472e3c8 KS	333	strfieldcat(dev_path, device_name);
f7b4eca4	334	dbg("looking at '%s'", dev_path);
ea733a2f GKH	335
ea733a2f GKH	336	/* open up the sysfs class device for this thing... */
bcbe2d8e	337	class_dev = sysfs_open_class_device_path(dev_path);
ea733a2f	338	if (class_dev == NULL) {
bcbe2d8e	339	dbg ("sysfs_open_class_device_path failed");
63dde9f8	340	goto exit;
ea733a2f	341	}
f7b4eca4	342	dbg("class_dev->name='%s'", class_dev->name);
ea733a2f	343
63dde9f8	344	exit:
ea733a2f GKH	345	return class_dev;
	346	}
	347
29fd7e67 GKH	348	/* wait for the "dev" file to show up in the directory in sysfs.
	349	* If it doesn't happen in about 10 seconds, give up.
	350	*/
f61d732a	351	#define SECONDS_TO_WAIT_FOR_FILE 10
eb6c7cd0	352	static int sleep_for_file(const char path, char file)
29fd7e67 GKH	353	{
29fd7e67 GKH	354	char filename[SYSFS_PATH_MAX + 6];
f61d732a	355	int loop = SECONDS_TO_WAIT_FOR_FILE;
c332cfc7	356	int retval;
29fd7e67	357
c472e3c8 KS	358	strfieldcpy(filename, sysfs_path);
c472e3c8 KS	359	strfieldcat(filename, path);
f61d732a	360	strfieldcat(filename, file);
29fd7e67	361
c332cfc7 RL	362	while (loop--) {
	363	struct stat buf;
	364
f7b4eca4	365	dbg("looking for '%s'", filename);
29fd7e67	366	retval = stat(filename, &buf);
c5118442	367	if (retval == 0)
29fd7e67	368	goto exit;
29fd7e67	369
f7b4eca4	370	/* sleep to give the kernel a chance to create the dev file */
29fd7e67 GKH	371	sleep(1);
	372	}
	373	retval = -ENODEV;
	374	exit:
	375	return retval;
	376	}
	377
bbbe503e	378	static int rename_net_if(struct udevice *dev, int fake)
f61d732a KS	379	{
	380	int sk;
	381	struct ifreq ifr;
	382	int retval;
	383
bbbe503e KS	384	dbg("changing net interface name from '%s' to '%s'", dev->kernel_name, dev->name);
	385	if (fake)
	386	return 0;
	387
f61d732a KS	388	sk = socket(PF_INET, SOCK_DGRAM, 0);
	389	if (sk < 0) {
	390	dbg("error opening socket");
	391	return -1;
	392	}
	393
	394	memset(&ifr, 0x00, sizeof(struct ifreq));
	395	strfieldcpy(ifr.ifr_name, dev->kernel_name);
	396	strfieldcpy(ifr.ifr_newname, dev->name);
	397
f61d732a KS	398	retval = ioctl(sk, SIOCSIFNAME, &ifr);
	399	if (retval != 0)
	400	dbg("error changing net interface name");
4a539daf	401	close(sk);
f61d732a KS	402
	403	return retval;
	404	}
	405
eb6c7cd0	406	int udev_add_device(const char path, const char subsystem, int fake)
ea733a2f	407	{
bbbe503e	408	struct sysfs_class_device *class_dev;
5840bc63	409	struct udevice dev;
9b28a52a	410	char devpath[DEVPATH_SIZE];
bbbe503e KS	411	char *pos;
bbbe503e KS	412	int retval;
ea733a2f	413
f3b04a2e GKH	414	memset(&dev, 0x00, sizeof(dev));
f3b04a2e GKH	415
f61d732a	416	dev.type = get_device_type(path, subsystem);
f61d732a KS	417	switch (dev.type) {
	418	case 'b':
	419	case 'c':
	420	retval = sleep_for_file(path, "/dev");
	421	break;
	422
	423	case 'n':
	424	retval = sleep_for_file(path, "/address");
	425	break;
	426
	427	default:
	428	dbg("unknown device type '%c'", dev.type);
bbbe503e	429	return -1;
f61d732a	430	}
63dde9f8	431
5840bc63	432	class_dev = get_class_dev(path);
ea733a2f	433	if (class_dev == NULL)
bbbe503e	434	return -1;
ea733a2f	435
f61d732a KS	436	if (dev.type == 'b' \|\| dev.type == 'c') {
	437	retval = get_major_minor(class_dev, &dev);
	438	if (retval != 0) {
	439	dbg("get_major_minor failed");
	440	goto exit;
	441	}
ea733a2f GKH	442	}
ea733a2f GKH	443
bbbe503e	444	if (namedev_name_device(class_dev, &dev) != 0)
30defadd GKH	445	goto exit;
30defadd GKH	446
f7b4eca4	447	dbg("name='%s'", dev.name);
bbbe503e	448
9825617b	449	selinux_init();
f61d732a KS	450	switch (dev.type) {
	451	case 'b':
	452	case 'c':
	453	retval = create_node(&dev, fake);
c4603a07	454	if (retval != 0)
bbbe503e	455	goto exit;
c4603a07	456	if ((!fake) && (udevdb_add_dev(path, &dev) != 0))
bbbe503e KS	457	dbg("udevdb_add_dev failed, but we are going to try "
	458	"to create the node anyway. But remove might not "
	459	"work properly for this device.");
9b28a52a KS	460
9b28a52a KS	461	dev_d_send(&dev, subsystem, path);
f61d732a KS	462	break;
	463
	464	case 'n':
a41de030	465	strfieldcpy(devpath, path);
bbbe503e KS	466	if (strcmp(dev.name, dev.kernel_name) != 0) {
bbbe503e KS	467	retval = rename_net_if(&dev, fake);
c4603a07	468	if (retval != 0)
bbbe503e KS	469	goto exit;
	470	/* netif's are keyed with the configured name, cause
	471	* the original kernel name sleeps with the fishes
	472	*/
9b28a52a	473	pos = strrchr(devpath, '/');
bbbe503e KS	474	if (pos != NULL) {
bbbe503e KS	475	pos[1] = '\0';
9b28a52a	476	strfieldcat(devpath, dev.name);
bbbe503e KS	477	}
bbbe503e KS	478	}
c4603a07	479	if ((!fake) && (udevdb_add_dev(devpath, &dev) != 0))
bbbe503e	480	dbg("udevdb_add_dev failed");
9b28a52a KS	481
9b28a52a KS	482	dev_d_send(&dev, subsystem, devpath);
f61d732a KS	483	break;
f61d732a KS	484	}
ea733a2f GKH	485
ea733a2f GKH	486	exit:
9825617b	487	selinux_restore();
bbbe503e	488	sysfs_close_class_device(class_dev);
30defadd	489
ea733a2f GKH	490	return retval;
ea733a2f GKH	491	}