[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>
#include <pwd.h>

#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
#include "udev_utils.h"
#include "udev_version.h"
#include "logging.h"
#include "namedev.h"
#include "udev_db.h"
#include "udev_selinux.h"

/*
 * the major/minor of a device is stored in a file called "dev"
 * The number is stored in decimal values in the format: M:m
 */
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;
}

int udev_make_node(struct udevice *udev, const char *file, int major, int minor, mode_t 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, udev->kernel_name, 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:
	switch (udev->type) {
	case 'b':
		mode |= S_IFBLK;
		break;
	case 'c':
	case 'u':
		mode |= S_IFCHR;
		break;
	case 'p':
		mode |= S_IFIFO;
		break;
	default:
		dbg("unknown node type %c\n", udev->type);
		return -EINVAL;
	}

	selinux_setfscreatecon(file, udev->kernel_name, 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;
}

static int create_node(struct udevice *udev, struct sysfs_class_device *class_dev)
{
	char filename[NAME_SIZE];
	char partitionname[NAME_SIZE];
	uid_t uid = 0;
	gid_t gid = 0;
	int tail;
	char *pos;
	int len;
		int i;

	snprintf(filename, NAME_SIZE, "%s/%s", udev_root, udev->name);
	filename[NAME_SIZE-1] = '\0';

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

	if (udev->owner[0] != '\0') {
		char *endptr;
		unsigned long id = strtoul(udev->owner, &endptr, 10);

		if (endptr[0] == '\0')
			uid = (uid_t) id;
		else {
			struct passwd *pw;

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

	if (udev->group[0] != '\0') {
		char *endptr;
		unsigned long id = strtoul(udev->group, &endptr, 10);

		if (endptr[0] == '\0')
			gid = (gid_t) id;
		else {
			struct group *gr = getgrnam(udev->group);
			if (gr == NULL)
				dbg("specified group unknown '%s'", udev->group);
			else
				gid = gr->gr_gid;
		}
	}

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

	/* create all_partitions if requested */
	if (udev->partitions > 0) {
		struct sysfs_attribute *attr;
		int range;

		/* take the maximum registered minor range */
		attr = sysfs_get_classdev_attr(class_dev, "range");
		if (attr) {
			range = atoi(attr->value);
			if (range > 1)
				udev->partitions = range-1;
		}
		info("creating device partition nodes '%s[1-%i]'", filename, udev->partitions);
		if (!udev->test_run) {
			for (i = 1; i <= udev->partitions; i++) {
				strfieldcpy(partitionname, filename);
				strintcat(partitionname, i);
				udev_make_node(udev, partitionname, udev->major, udev->minor + i, udev->mode, uid, gid);
			}
		}
	}

	/* create symlink(s) if requested */
	foreach_strpart(udev->symlink, " ", pos, len) {
		char linkname[NAME_SIZE];
		char linktarget[NAME_SIZE];

		strfieldcpymax(linkname, pos, len+1);
		snprintf(filename, NAME_SIZE, "%s/%s", udev_root, linkname);
		filename[NAME_SIZE-1] = '\0';

		dbg("symlink '%s' to node '%s' requested", filename, udev->name);
		if (!udev->test_run)
			if (strrchr(linkname, '/'))
				create_path(filename);

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

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

		dbg("symlink(%s, %s)", linktarget, filename);
		if (!udev->test_run) {
			selinux_setfscreatecon(filename, udev->kernel_name, 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 int rename_net_if(struct udevice *udev)
{
	int sk;
	struct ifreq ifr;
	int retval;

	dbg("changing net interface name from '%s' to '%s'", udev->kernel_name, udev->name);
	if (udev->test_run)
		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, udev->kernel_name);
	strfieldcpy(ifr.ifr_newname, udev->name);

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

	return retval;
}

int udev_add_device(struct udevice *udev, struct sysfs_class_device *class_dev)
{
	char *pos;
	int retval = 0;

	if (udev->type == 'b' || udev->type == 'c') {
		retval = get_major_minor(class_dev, udev);
		if (retval != 0) {
			dbg("no dev-file found, do nothing");
			return 0;
		}
	}

	if (namedev_name_device(udev, class_dev) != 0)
		return 0;

	dbg("adding name='%s'", udev->name);

	selinux_init();

	if (udev->type == 'b' || udev->type == 'c') {
		retval = create_node(udev, class_dev);
		if (retval != 0)
			goto exit;

		if (udev_db_add_device(udev) != 0)
			dbg("udev_db_add_dev failed, but we create the node anyway, "
			    "remove might not work for custom names");

		/* use full path to the environment */
		snprintf(udev->devname, NAME_SIZE, "%s/%s", udev_root, udev->name);
		udev->devname[NAME_SIZE-1] = '\0';

	} else if (udev->type == 'n') {
		/* look if we want to change the name of the netif */
		if (strcmp(udev->name, udev->kernel_name) != 0) {
			retval = rename_net_if(udev);
			if (retval != 0)
				goto exit;

			/* we've changed the name, now fake the devpath, cause the
			 * original kernel name sleeps with the fishes and we don't
			 * get an event from the kernel with the new name
			 */
			pos = strrchr(udev->devpath, '/');
			if (pos != NULL) {
				pos[1] = '\0';
				strfieldcat(udev->devpath, udev->name);
				setenv("DEVPATH", udev->devpath, 1);
				setenv("INTERFACE", udev->name, 1);
			}

			/* use netif name for the environment */
			strfieldcpy(udev->devname, udev->name);
		}
	}

exit:
	selinux_restore();

	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	37	#include <pwd.h>
ea733a2f	38
c80da508	39	#include "libsysfs/sysfs/libsysfs.h"
ea733a2f	40	#include "udev.h"
9af5bb2f	41	#include "udev_utils.h"
ea733a2f	42	#include "udev_version.h"
54988802	43	#include "logging.h"
ea733a2f	44	#include "namedev.h"
02fa9ae5	45	#include "udev_db.h"
fbda4a34	46	#include "udev_selinux.h"
9825617b	47
707680b1 KS	48	/*
	49	* the major/minor of a device is stored in a file called "dev"
	50	* The number is stored in decimal values in the format: M:m
ea733a2f	51	*/
30defadd	52	static int get_major_minor(struct sysfs_class_device class_dev, struct udevice udev)
ea733a2f	53	{
5d4754f1	54	struct sysfs_attribute *attr = NULL;
ea733a2f	55
5d4754f1 DS	56	attr = sysfs_get_classdev_attr(class_dev, "dev");
5d4754f1 DS	57	if (attr == NULL)
bbbe503e	58	goto error;
5d4754f1	59	dbg("dev='%s'", attr->value);
ea733a2f	60
5d4754f1	61	if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2)
bbbe503e	62	goto error;
f7b4eca4	63	dbg("found major=%d, minor=%d", udev->major, udev->minor);
ea733a2f	64
bbbe503e KS	65	return 0;
	66	error:
	67	return -1;
ea733a2f GKH	68	}
ea733a2f GKH	69
c1ab0461	70	int udev_make_node(struct udevice udev, const char file, int major, int minor, mode_t mode, uid_t uid, gid_t gid)
50e5de03	71	{
49747bdc KS	72	struct stat stats;
	73	int retval = 0;
	74
	75	if (stat(file, &stats) != 0)
	76	goto create;
	77
	78	/* preserve node with already correct numbers, to not change the inode number */
	79	if (((stats.st_mode & S_IFMT) == S_IFBLK \|\| (stats.st_mode & S_IFMT) == S_IFCHR) &&
	80	(stats.st_rdev == makedev(major, minor))) {
	81	dbg("preserve file '%s', cause it has correct dev_t", file);
fbda4a34	82	selinux_setfilecon(file, udev->kernel_name, stats.st_mode);
49747bdc KS	83	goto perms;
	84	}
	85
	86	if (unlink(file) != 0)
	87	dbg("unlink(%s) failed with error '%s'", file, strerror(errno));
	88	else
	89	dbg("already present file '%s' unlinked", file);
50e5de03	90
49747bdc	91	create:
6a24dc74 KS	92	switch (udev->type) {
	93	case 'b':
	94	mode \|= S_IFBLK;
	95	break;
	96	case 'c':
	97	case 'u':
	98	mode \|= S_IFCHR;
	99	break;
	100	case 'p':
	101	mode \|= S_IFIFO;
	102	break;
	103	default:
	104	dbg("unknown node type %c\n", udev->type);
	105	return -EINVAL;
	106	}
	107
fbda4a34	108	selinux_setfscreatecon(file, udev->kernel_name, mode);
49747bdc	109	retval = mknod(file, mode, makedev(major, minor));
50e5de03 KS	110	if (retval != 0) {
50e5de03 KS	111	dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
49747bdc	112	file, mode, major, minor, strerror(errno));
bbbe503e	113	goto exit;
50e5de03 KS	114	}
50e5de03 KS	115
49747bdc KS	116	perms:
	117	dbg("chmod(%s, %#o)", file, mode);
	118	if (chmod(file, mode) != 0) {
	119	dbg("chmod(%s, %#o) failed with error '%s'", file, mode, strerror(errno));
bbbe503e	120	goto exit;
50e5de03 KS	121	}
	122
	123	if (uid != 0 \|\| gid != 0) {
49747bdc KS	124	dbg("chown(%s, %u, %u)", file, uid, gid);
49747bdc KS	125	if (chown(file, uid, gid) != 0) {
50e5de03	126	dbg("chown(%s, %u, %u) failed with error '%s'",
49747bdc	127	file, uid, gid, strerror(errno));
bbbe503e	128	goto exit;
50e5de03 KS	129	}
	130	}
	131
bbbe503e KS	132	exit:
bbbe503e KS	133	return retval;
50e5de03 KS	134	}
50e5de03 KS	135
6d564166	136	static int create_node(struct udevice udev, struct sysfs_class_device class_dev)
97853b4f	137	{
9fe3f9a9	138	char filename[NAME_SIZE];
9fe3f9a9	139	char partitionname[NAME_SIZE];
e308ebb7 GKH	140	uid_t uid = 0;
e308ebb7 GKH	141	gid_t gid = 0;
3d150dfb	142	int tail;
ef672b3d KS	143	char *pos;
ef672b3d KS	144	int len;
6d564166	145	int i;
3d150dfb	146
8673dcb8	147	snprintf(filename, NAME_SIZE, "%s/%s", udev_root, udev->name);
2b41e68a	148	filename[NAME_SIZE-1] = '\0';
5840bc63	149
3d150dfb	150	/* create parent directories if needed */
6a24dc74	151	if (strchr(udev->name, '/'))
3d150dfb	152	create_path(filename);
218eae87	153
7a947ce5	154	if (udev->owner[0] != '\0') {
c19a6b30	155	char *endptr;
7a947ce5	156	unsigned long id = strtoul(udev->owner, &endptr, 10);
6d564166	157
765cbd97	158	if (endptr[0] == '\0')
c19a6b30	159	uid = (uid_t) id;
10950dfe	160	else {
5895eb31	161	struct passwd *pw;
534c853d	162
7a947ce5	163	pw = getpwnam(udev->owner);
765cbd97	164	if (pw == NULL)
7a947ce5	165	dbg("specified user unknown '%s'", udev->owner);
10950dfe GKH	166	else
	167	uid = pw->pw_uid;
	168	}
c19a6b30 KS	169	}
c19a6b30 KS	170
7a947ce5	171	if (udev->group[0] != '\0') {
c19a6b30	172	char *endptr;
7a947ce5	173	unsigned long id = strtoul(udev->group, &endptr, 10);
6d564166	174
765cbd97	175	if (endptr[0] == '\0')
c19a6b30	176	gid = (gid_t) id;
10950dfe	177	else {
7a947ce5	178	struct group *gr = getgrnam(udev->group);
765cbd97	179	if (gr == NULL)
7a947ce5	180	dbg("specified group unknown '%s'", udev->group);
10950dfe GKH	181	else
	182	gid = gr->gr_gid;
	183	}
c19a6b30 KS	184	}
c19a6b30 KS	185
7a947ce5	186	if (!udev->test_run) {
50e5de03	187	info("creating device node '%s'", filename);
c1ab0461	188	if (udev_make_node(udev, filename, udev->major, udev->minor, udev->mode, uid, gid) != 0)
bbbe503e	189	goto error;
ab2e5bd9 GKH	190	} else {
	191	info("creating device node '%s', major = '%d', minor = '%d', "
	192	"mode = '%#o', uid = '%d', gid = '%d'", filename,
65ab1334	193	udev->major, udev->minor, udev->mode, uid, gid);
ab2e5bd9	194	}
50e5de03	195
bbbe503e	196	/* create all_partitions if requested */
7a947ce5	197	if (udev->partitions > 0) {
6d564166 KS	198	struct sysfs_attribute *attr;
	199	int range;
	200
	201	/* take the maximum registered minor range */
	202	attr = sysfs_get_classdev_attr(class_dev, "range");
	203	if (attr) {
	204	range = atoi(attr->value);
	205	if (range > 1)
	206	udev->partitions = range-1;
	207	}
7a947ce5 KS	208	info("creating device partition nodes '%s[1-%i]'", filename, udev->partitions);
	209	if (!udev->test_run) {
	210	for (i = 1; i <= udev->partitions; i++) {
c58e36c0 KS	211	strfieldcpy(partitionname, filename);
c58e36c0 KS	212	strintcat(partitionname, i);
c1ab0461	213	udev_make_node(udev, partitionname, udev->major, udev->minor + i, udev->mode, uid, gid);
ab2e5bd9	214	}
50e5de03	215	}
3d150dfb KS	216	}
3d150dfb KS	217
bbbe503e	218	/* create symlink(s) if requested */
7a947ce5	219	foreach_strpart(udev->symlink, " ", pos, len) {
2b41e68a KS	220	char linkname[NAME_SIZE];
	221	char linktarget[NAME_SIZE];
	222
17794d77	223	strfieldcpymax(linkname, pos, len+1);
8673dcb8	224	snprintf(filename, NAME_SIZE, "%s/%s", udev_root, linkname);
2b41e68a KS	225	filename[NAME_SIZE-1] = '\0';
2b41e68a KS	226
7a947ce5 KS	227	dbg("symlink '%s' to node '%s' requested", filename, udev->name);
7a947ce5 KS	228	if (!udev->test_run)
9fe3f9a9 KS	229	if (strrchr(linkname, '/'))
	230	create_path(filename);
	231
	232	/* optimize relative link */
	233	linktarget[0] = '\0';
	234	i = 0;
	235	tail = 0;
7a947ce5 KS	236	while ((udev->name[i] == linkname[i]) && udev->name[i]) {
7a947ce5 KS	237	if (udev->name[i] == '/')
9fe3f9a9 KS	238	tail = i+1;
	239	i++;
	240	}
	241	while (linkname[i] != '\0') {
	242	if (linkname[i] == '/')
	243	strfieldcat(linktarget, "../");
	244	i++;
	245	}
3d150dfb	246
7a947ce5	247	strfieldcat(linktarget, &udev->name[tail]);
3d150dfb	248
9fe3f9a9	249	dbg("symlink(%s, %s)", linktarget, filename);
7a947ce5	250	if (!udev->test_run) {
fbda4a34	251	selinux_setfscreatecon(filename, udev->kernel_name, S_IFLNK);
49747bdc	252	unlink(filename);
bbbe503e	253	if (symlink(linktarget, filename) != 0)
9fe3f9a9 KS	254	dbg("symlink(%s, %s) failed with error '%s'",
9fe3f9a9 KS	255	linktarget, filename, strerror(errno));
4763256c	256	}
c19a6b30 KS	257	}
c19a6b30 KS	258
bbbe503e KS	259	return 0;
	260	error:
	261	return -1;
ea733a2f GKH	262	}
ea733a2f GKH	263
7a947ce5	264	static int rename_net_if(struct udevice *udev)
f61d732a KS	265	{
	266	int sk;
	267	struct ifreq ifr;
	268	int retval;
	269
7a947ce5 KS	270	dbg("changing net interface name from '%s' to '%s'", udev->kernel_name, udev->name);
7a947ce5 KS	271	if (udev->test_run)
bbbe503e KS	272	return 0;
bbbe503e KS	273
f61d732a KS	274	sk = socket(PF_INET, SOCK_DGRAM, 0);
	275	if (sk < 0) {
	276	dbg("error opening socket");
	277	return -1;
	278	}
	279
	280	memset(&ifr, 0x00, sizeof(struct ifreq));
7a947ce5 KS	281	strfieldcpy(ifr.ifr_name, udev->kernel_name);
7a947ce5 KS	282	strfieldcpy(ifr.ifr_newname, udev->name);
f61d732a	283
f61d732a KS	284	retval = ioctl(sk, SIOCSIFNAME, &ifr);
	285	if (retval != 0)
	286	dbg("error changing net interface name");
4a539daf	287	close(sk);
f61d732a KS	288
	289	return retval;
	290	}
	291
7a947ce5	292	int udev_add_device(struct udevice udev, struct sysfs_class_device class_dev)
ea733a2f	293	{
bbbe503e	294	char *pos;
707680b1	295	int retval = 0;
ea733a2f	296
7a947ce5 KS	297	if (udev->type == 'b' \|\| udev->type == 'c') {
7a947ce5 KS	298	retval = get_major_minor(class_dev, udev);
f61d732a	299	if (retval != 0) {
707680b1	300	dbg("no dev-file found, do nothing");
5d24c6ca	301	return 0;
f61d732a	302	}
ea733a2f GKH	303	}
ea733a2f GKH	304
7a947ce5	305	if (namedev_name_device(udev, class_dev) != 0)
85a953c0	306	return 0;
30defadd	307
7a947ce5	308	dbg("adding name='%s'", udev->name);
bbbe503e	309
9825617b	310	selinux_init();
5d24c6ca KS	311
5d24c6ca KS	312	if (udev->type == 'b' \|\| udev->type == 'c') {
6d564166	313	retval = create_node(udev, class_dev);
c4603a07	314	if (retval != 0)
bbbe503e	315	goto exit;
9b28a52a	316
02fa9ae5 KS	317	if (udev_db_add_device(udev) != 0)
02fa9ae5 KS	318	dbg("udev_db_add_dev failed, but we create the node anyway, "
5d24c6ca	319	"remove might not work for custom names");
f61d732a	320
5d24c6ca	321	/* use full path to the environment */
8673dcb8	322	snprintf(udev->devname, NAME_SIZE, "%s/%s", udev_root, udev->name);
2b41e68a	323	udev->devname[NAME_SIZE-1] = '\0';
5d24c6ca KS	324
	325	} else if (udev->type == 'n') {
	326	/* look if we want to change the name of the netif */
7a947ce5 KS	327	if (strcmp(udev->name, udev->kernel_name) != 0) {
7a947ce5 KS	328	retval = rename_net_if(udev);
c4603a07	329	if (retval != 0)
bbbe503e	330	goto exit;
5d24c6ca	331
eabfc973 KS	332	/* we've changed the name, now fake the devpath, cause the
	333	* original kernel name sleeps with the fishes and we don't
	334	* get an event from the kernel with the new name
bbbe503e	335	*/
7a947ce5	336	pos = strrchr(udev->devpath, '/');
bbbe503e KS	337	if (pos != NULL) {
bbbe503e KS	338	pos[1] = '\0';
7a947ce5	339	strfieldcat(udev->devpath, udev->name);
5d24c6ca	340	setenv("DEVPATH", udev->devpath, 1);
eabfc973	341	setenv("INTERFACE", udev->name, 1);
bbbe503e	342	}
9b28a52a	343
5d24c6ca KS	344	/* use netif name for the environment */
	345	strfieldcpy(udev->devname, udev->name);
	346	}
f61d732a	347	}
ea733a2f GKH	348
ea733a2f GKH	349	exit:
9825617b	350	selinux_restore();
30defadd	351
ea733a2f GKH	352	return retval;
ea733a2f GKH	353	}