4 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
5 * Copyright (C) 2004 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.
29 #include <sys/types.h>
32 #include <sys/socket.h>
33 #include <sys/ioctl.h>
34 #include <linux/sockios.h>
36 #include "libsysfs/sysfs/libsysfs.h"
37 #include "udev_libc_wrapper.h"
39 #include "udev_utils.h"
40 #include "udev_version.h"
42 #include "udev_rules.h"
43 #include "udev_selinux.h"
46 int udev_make_node(struct udevice *udev, const char *file, dev_t devt, mode_t mode, uid_t uid, gid_t gid)
59 dbg("unknown node type %c\n", udev->type);
63 if (stat(file, &stats) != 0)
66 /* preserve node with already correct numbers, to not change the inode number */
67 if ((stats.st_mode & S_IFMT) == (mode & S_IFMT) && (stats.st_rdev == devt)) {
68 info("preserve file '%s', cause it has correct dev_t", file);
69 selinux_setfilecon(file, udev->kernel_name, stats.st_mode);
73 if (unlink(file) != 0)
74 err("unlink(%s) failed: %s", file, strerror(errno));
76 dbg("already present file '%s' unlinked", file);
79 selinux_setfscreatecon(file, udev->kernel_name, mode);
80 retval = mknod(file, mode, devt);
81 selinux_resetfscreatecon();
83 err("mknod(%s, %#o, %u, %u) failed: %s",
84 file, mode, major(devt), minor(devt), strerror(errno));
89 dbg("chmod(%s, %#o)", file, mode);
90 if (chmod(file, mode) != 0) {
91 err("chmod(%s, %#o) failed: %s", file, mode, strerror(errno));
95 if (uid != 0 || gid != 0) {
96 dbg("chown(%s, %u, %u)", file, uid, gid);
97 if (chown(file, uid, gid) != 0) {
98 err("chown(%s, %u, %u) failed: %s",
99 file, uid, gid, strerror(errno));
108 static int create_node(struct udevice *udev, struct sysfs_class_device *class_dev)
110 char filename[PATH_SIZE];
111 char partitionname[PATH_SIZE];
112 struct name_entry *name_loop;
118 snprintf(filename, sizeof(filename), "%s/%s", udev_root, udev->name);
119 filename[sizeof(filename)-1] = '\0';
121 /* create parent directories if needed */
122 if (strchr(udev->name, '/'))
123 create_path(filename);
125 if (strcmp(udev->owner, "root") == 0)
131 id = strtoul(udev->owner, &endptr, 10);
132 if (endptr[0] == '\0')
135 uid = lookup_user(udev->owner);
138 if (strcmp(udev->group, "root") == 0)
144 id = strtoul(udev->group, &endptr, 10);
145 if (endptr[0] == '\0')
148 gid = lookup_group(udev->group);
151 if (!udev->test_run) {
152 info("creating device node '%s'", filename);
153 if (udev_make_node(udev, filename, udev->devt, udev->mode, uid, gid) != 0)
156 info("creating device node '%s', major = '%d', minor = '%d', "
157 "mode = '%#o', uid = '%d', gid = '%d'", filename,
158 major(udev->devt), minor(udev->devt), udev->mode, uid, gid);
161 /* create all_partitions if requested */
162 if (udev->partitions) {
163 struct sysfs_attribute *attr;
166 /* take the maximum registered minor range */
167 attr = sysfs_get_classdev_attr(class_dev, "range");
169 range = atoi(attr->value);
171 udev->partitions = range-1;
173 info("creating device partition nodes '%s[1-%i]'", filename, udev->partitions);
174 if (!udev->test_run) {
175 for (i = 1; i <= udev->partitions; i++) {
178 snprintf(partitionname, sizeof(partitionname), "%s%d", filename, i);
179 partitionname[sizeof(partitionname)-1] = '\0';
180 part_devt = makedev(major(udev->devt), minor(udev->devt) + i);
181 udev_make_node(udev, partitionname, part_devt, udev->mode, uid, gid);
186 /* create symlink(s) if requested */
187 list_for_each_entry(name_loop, &udev->symlink_list, node) {
189 char linktarget[PATH_SIZE];
191 snprintf(filename, sizeof(filename), "%s/%s", udev_root, name_loop->name);
192 filename[sizeof(filename)-1] = '\0';
194 dbg("symlink '%s' to node '%s' requested", filename, udev->name);
196 if (strchr(filename, '/'))
197 create_path(filename);
199 /* optimize relative link */
200 linktarget[0] = '\0';
203 while (udev->name[i] && (udev->name[i] == name_loop->name[i])) {
204 if (udev->name[i] == '/')
208 while (name_loop->name[i] != '\0') {
209 if (name_loop->name[i] == '/')
210 strlcat(linktarget, "../", sizeof(linktarget));
214 strlcat(linktarget, &udev->name[tail], sizeof(linktarget));
216 info("creating symlink '%s' to '%s'", filename, linktarget);
217 if (!udev->test_run) {
219 selinux_setfscreatecon(filename, NULL, S_IFLNK);
220 retval = symlink(linktarget, filename);
221 selinux_resetfscreatecon();
223 err("symlink(%s, %s) failed: %s",
224 linktarget, filename, strerror(errno));
233 static int rename_net_if(struct udevice *udev)
239 info("changing net interface name from '%s' to '%s'", udev->kernel_name, udev->name);
243 sk = socket(PF_INET, SOCK_DGRAM, 0);
245 err("error opening socket: %s", strerror(errno));
249 memset(&ifr, 0x00, sizeof(struct ifreq));
250 strlcpy(ifr.ifr_name, udev->kernel_name, IFNAMSIZ);
251 strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ);
253 retval = ioctl(sk, SIOCSIFNAME, &ifr);
255 err("error changing net interface name: %s", strerror(errno));
261 int udev_add_device(struct udevice *udev, struct sysfs_class_device *class_dev)
266 dbg("adding name='%s'", udev->name);
269 if (udev->type == DEV_BLOCK || udev->type == DEV_CLASS) {
270 retval = create_node(udev, class_dev);
274 if (udev_db_add_device(udev) != 0)
275 dbg("udev_db_add_dev failed, but we create the node anyway, "
276 "remove might not work for custom names");
278 /* use full path to the environment */
279 snprintf(udev->devname, sizeof(udev->devname), "%s/%s", udev_root, udev->name);
280 udev->devname[sizeof(udev->devname)-1] = '\0';
282 } else if (udev->type == DEV_NET) {
283 /* look if we want to change the name of the netif */
284 if (strcmp(udev->name, udev->kernel_name) != 0) {
285 retval = rename_net_if(udev);
289 info("renamed netif to '%s'", udev->name);
290 /* we've changed the name, now fake the devpath, cause the
291 * original kernel name sleeps with the fishes and we don't
292 * get an event from the kernel with the new name
294 pos = strrchr(udev->devpath, '/');
297 strlcat(udev->devpath, udev->name, sizeof(udev->devpath));
298 strlcpy(udev->kernel_name, udev->name, sizeof(udev->kernel_name));
299 setenv("DEVPATH", udev->devpath, 1);
300 setenv("INTERFACE", udev->name, 1);
303 /* use netif name for the environment */
304 strlcpy(udev->devname, udev->name, sizeof(udev->devname));