6 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
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.
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.
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.
31 #include <sys/types.h>
34 #include <sys/socket.h>
35 #include <sys/ioctl.h>
36 #include <linux/sockios.h>
38 #include "libsysfs/sysfs/libsysfs.h"
39 #include "udev_libc_wrapper.h"
41 #include "udev_utils.h"
42 #include "udev_sysfs.h"
43 #include "udev_version.h"
45 #include "udev_rules.h"
47 #include "udev_selinux.h"
50 int udev_make_node(struct udevice *udev, const char *file, dev_t devt, mode_t mode, uid_t uid, gid_t gid)
63 dbg("unknown node type %c\n", udev->type);
67 if (stat(file, &stats) != 0)
70 /* preserve node with already correct numbers, to not change the inode number */
71 if ((stats.st_mode & S_IFMT) == (mode & S_IFMT) && (stats.st_rdev == devt)) {
72 info("preserve file '%s', cause it has correct dev_t", file);
73 selinux_setfilecon(file, udev->kernel_name, stats.st_mode);
77 if (unlink(file) != 0)
78 dbg("unlink(%s) failed with error '%s'", file, strerror(errno));
80 dbg("already present file '%s' unlinked", file);
83 selinux_setfscreatecon(file, udev->kernel_name, mode);
84 retval = mknod(file, mode, devt);
85 selinux_resetfscreatecon();
87 err("mknod(%s, %#o, %u, %u) failed with error '%s'",
88 file, mode, major(devt), minor(devt), strerror(errno));
93 dbg("chmod(%s, %#o)", file, mode);
94 if (chmod(file, mode) != 0) {
95 dbg("chmod(%s, %#o) failed with error '%s'", file, mode, strerror(errno));
99 if (uid != 0 || gid != 0) {
100 dbg("chown(%s, %u, %u)", file, uid, gid);
101 if (chown(file, uid, gid) != 0) {
102 dbg("chown(%s, %u, %u) failed with error '%s'",
103 file, uid, gid, strerror(errno));
112 static int create_node(struct udevice *udev, struct sysfs_class_device *class_dev)
114 char filename[PATH_SIZE];
115 char partitionname[PATH_SIZE];
116 struct name_entry *name_loop;
122 snprintf(filename, sizeof(filename), "%s/%s", udev_root, udev->name);
123 filename[sizeof(filename)-1] = '\0';
125 /* create parent directories if needed */
126 if (strchr(udev->name, '/'))
127 create_path(filename);
129 if (strcmp(udev->owner, "root") == 0)
135 id = strtoul(udev->owner, &endptr, 10);
136 if (endptr[0] == '\0')
139 uid = lookup_user(udev->owner);
142 if (strcmp(udev->group, "root") == 0)
148 id = strtoul(udev->group, &endptr, 10);
149 if (endptr[0] == '\0')
152 gid = lookup_group(udev->group);
155 if (!udev->test_run) {
156 info("creating device node '%s'", filename);
157 if (udev_make_node(udev, filename, udev->devt, udev->mode, uid, gid) != 0)
160 info("creating device node '%s', major = '%d', minor = '%d', "
161 "mode = '%#o', uid = '%d', gid = '%d'", filename,
162 major(udev->devt), minor(udev->devt), udev->mode, uid, gid);
165 /* create all_partitions if requested */
166 if (udev->partitions) {
167 struct sysfs_attribute *attr;
170 /* take the maximum registered minor range */
171 attr = sysfs_get_classdev_attr(class_dev, "range");
173 range = atoi(attr->value);
175 udev->partitions = range-1;
177 info("creating device partition nodes '%s[1-%i]'", filename, udev->partitions);
178 if (!udev->test_run) {
179 for (i = 1; i <= udev->partitions; i++) {
182 snprintf(partitionname, sizeof(partitionname), "%s%d", filename, i);
183 partitionname[sizeof(partitionname)-1] = '\0';
184 part_devt = makedev(major(udev->devt), minor(udev->devt) + i);
185 udev_make_node(udev, partitionname, part_devt, udev->mode, uid, gid);
190 /* create symlink(s) if requested */
191 list_for_each_entry(name_loop, &udev->symlink_list, node) {
193 char linktarget[PATH_SIZE];
195 snprintf(filename, sizeof(filename), "%s/%s", udev_root, name_loop->name);
196 filename[sizeof(filename)-1] = '\0';
198 dbg("symlink '%s' to node '%s' requested", filename, udev->name);
200 if (strchr(filename, '/'))
201 create_path(filename);
203 /* optimize relative link */
204 linktarget[0] = '\0';
207 while (udev->name[i] && (udev->name[i] == name_loop->name[i])) {
208 if (udev->name[i] == '/')
212 while (name_loop->name[i] != '\0') {
213 if (name_loop->name[i] == '/')
214 strlcat(linktarget, "../", sizeof(linktarget));
218 strlcat(linktarget, &udev->name[tail], sizeof(linktarget));
220 dbg("symlink(%s, %s)", linktarget, filename);
221 if (!udev->test_run) {
223 selinux_setfscreatecon(filename, NULL, S_IFLNK);
224 retval = symlink(linktarget, filename);
225 selinux_resetfscreatecon();
227 dbg("symlink(%s, %s) failed with error '%s'",
228 linktarget, filename, strerror(errno));
237 static int rename_net_if(struct udevice *udev)
243 info("changing net interface name from '%s' to '%s'", udev->kernel_name, udev->name);
247 sk = socket(PF_INET, SOCK_DGRAM, 0);
249 dbg("error opening socket");
253 memset(&ifr, 0x00, sizeof(struct ifreq));
254 strlcpy(ifr.ifr_name, udev->kernel_name, IFNAMSIZ);
255 strlcpy(ifr.ifr_newname, udev->name, IFNAMSIZ);
257 retval = ioctl(sk, SIOCSIFNAME, &ifr);
259 dbg("error changing net interface name");
265 int udev_add_device(struct udevice *udev, struct sysfs_class_device *class_dev)
270 dbg("adding name='%s'", udev->name);
273 if (udev->type == DEV_BLOCK || udev->type == DEV_CLASS) {
274 retval = create_node(udev, class_dev);
278 if (udev_db_add_device(udev) != 0)
279 dbg("udev_db_add_dev failed, but we create the node anyway, "
280 "remove might not work for custom names");
282 /* use full path to the environment */
283 snprintf(udev->devname, sizeof(udev->devname), "%s/%s", udev_root, udev->name);
284 udev->devname[sizeof(udev->devname)-1] = '\0';
286 } else if (udev->type == DEV_NET) {
287 /* look if we want to change the name of the netif */
288 if (strcmp(udev->name, udev->kernel_name) != 0) {
289 retval = rename_net_if(udev);
293 info("renamed netif to '%s'", udev->name);
294 /* we've changed the name, now fake the devpath, cause the
295 * original kernel name sleeps with the fishes and we don't
296 * get an event from the kernel with the new name
298 pos = strrchr(udev->devpath, '/');
301 strlcat(udev->devpath, udev->name, sizeof(udev->devpath));
302 strlcpy(udev->kernel_name, udev->name, sizeof(udev->kernel_name));
303 setenv("DEVPATH", udev->devpath, 1);
304 setenv("INTERFACE", udev->name, 1);
307 /* use netif name for the environment */
308 strlcpy(udev->devname, udev->name, sizeof(udev->devname));