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>
42 #include "libsysfs/sysfs/libsysfs.h"
45 #include "udev_version.h"
49 #include "klibc_fixups.h"
51 #define LOCAL_USER "$local"
54 * Right now the major/minor of a device is stored in a file called
56 * The number is stored as:
60 * The value is in decimal.
62 static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice *udev)
64 struct sysfs_attribute *attr = NULL;
66 attr = sysfs_get_classdev_attr(class_dev, "dev");
69 dbg("dev='%s'", attr->value);
71 if (sscanf(attr->value, "%u:%u", &udev->major, &udev->minor) != 2)
73 dbg("found major=%d, minor=%d", udev->major, udev->minor);
80 static int create_path(char *file)
88 pos = strchr(p+1, '/');
90 pos = strchr(pos+1, '/');
94 if (stat(p, &stats)) {
95 retval = mkdir(p, 0755);
97 dbg("mkdir(%s) failed with error '%s'",
101 dbg("created '%s'", p);
108 static int make_node(char *file, int major, int minor, unsigned int mode, uid_t uid, gid_t gid)
113 if (stat(file, &stats) != 0)
116 /* preserve node with already correct numbers, to not change the inode number */
117 if (((stats.st_mode & S_IFMT) == S_IFBLK || (stats.st_mode & S_IFMT) == S_IFCHR) &&
118 (stats.st_rdev == makedev(major, minor))) {
119 dbg("preserve file '%s', cause it has correct dev_t", file);
123 if (unlink(file) != 0)
124 dbg("unlink(%s) failed with error '%s'", file, strerror(errno));
126 dbg("already present file '%s' unlinked", file);
129 retval = mknod(file, mode, makedev(major, minor));
131 dbg("mknod(%s, %#o, %u, %u) failed with error '%s'",
132 file, mode, major, minor, strerror(errno));
137 dbg("chmod(%s, %#o)", file, mode);
138 if (chmod(file, mode) != 0) {
139 dbg("chmod(%s, %#o) failed with error '%s'", file, mode, strerror(errno));
143 if (uid != 0 || gid != 0) {
144 dbg("chown(%s, %u, %u)", file, uid, gid);
145 if (chown(file, uid, gid) != 0) {
146 dbg("chown(%s, %u, %u) failed with error '%s'",
147 file, uid, gid, strerror(errno));
156 /* get the local logged in user */
157 static void set_to_local_user(char *user)
162 strfieldcpymax(user, default_owner_str, OWNER_SIZE);
169 /* is this a user login ? */
170 if (u->ut_type != USER_PROCESS)
173 /* is this a local login ? */
174 if (strcmp(u->ut_host, ""))
177 if (u->ut_time > recent) {
179 strfieldcpymax(user, u->ut_user, OWNER_SIZE);
180 dbg("local user is '%s'", user);
187 static int create_node(struct udevice *dev, int fake)
189 char filename[NAME_SIZE];
190 char linkname[NAME_SIZE];
191 char linktarget[NAME_SIZE];
192 char partitionname[NAME_SIZE];
200 strfieldcpy(filename, udev_root);
201 strfieldcat(filename, dev->name);
205 dev->mode |= S_IFBLK;
209 dev->mode |= S_IFCHR;
212 dev->mode |= S_IFIFO;
215 dbg("unknown node type %c\n", dev->type);
219 /* create parent directories if needed */
220 if (strrchr(dev->name, '/'))
221 create_path(filename);
223 if (dev->owner[0] != '\0') {
225 unsigned long id = strtoul(dev->owner, &endptr, 10);
226 if (endptr[0] == '\0')
230 if (strncmp(dev->owner, LOCAL_USER, sizeof(LOCAL_USER)) == 0)
231 set_to_local_user(dev->owner);
233 pw = getpwnam(dev->owner);
235 dbg("specified user unknown '%s'", dev->owner);
241 if (dev->group[0] != '\0') {
243 unsigned long id = strtoul(dev->group, &endptr, 10);
244 if (endptr[0] == '\0')
247 struct group *gr = getgrnam(dev->group);
249 dbg("specified group unknown '%s'", dev->group);
256 info("creating device node '%s'", filename);
257 if (make_node(filename, dev->major, dev->minor, dev->mode, uid, gid) != 0)
260 info("creating device node '%s', major = '%d', minor = '%d', "
261 "mode = '%#o', uid = '%d', gid = '%d'", filename,
262 dev->major, dev->minor, (mode_t)dev->mode, uid, gid);
265 /* create all_partitions if requested */
266 if (dev->partitions > 0) {
267 info("creating device partition nodes '%s[1-%i]'", filename, dev->partitions);
269 for (i = 1; i <= dev->partitions; i++) {
270 strfieldcpy(partitionname, filename);
271 strintcat(partitionname, i);
272 make_node(partitionname, dev->major,
273 dev->minor + i, dev->mode, uid, gid);
278 /* create symlink(s) if requested */
279 foreach_strpart(dev->symlink, " ", pos, len) {
280 strfieldcpymax(linkname, pos, len+1);
281 strfieldcpy(filename, udev_root);
282 strfieldcat(filename, linkname);
283 dbg("symlink '%s' to node '%s' requested", filename, dev->name);
285 if (strrchr(linkname, '/'))
286 create_path(filename);
288 /* optimize relative link */
289 linktarget[0] = '\0';
292 while ((dev->name[i] == linkname[i]) && dev->name[i]) {
293 if (dev->name[i] == '/')
297 while (linkname[i] != '\0') {
298 if (linkname[i] == '/')
299 strfieldcat(linktarget, "../");
303 strfieldcat(linktarget, &dev->name[tail]);
305 dbg("symlink(%s, %s)", linktarget, filename);
308 if (symlink(linktarget, filename) != 0)
309 dbg("symlink(%s, %s) failed with error '%s'",
310 linktarget, filename, strerror(errno));
319 static struct sysfs_class_device *get_class_dev(char *device_name)
321 char dev_path[SYSFS_PATH_MAX];
322 struct sysfs_class_device *class_dev = NULL;
324 strfieldcpy(dev_path, sysfs_path);
325 strfieldcat(dev_path, device_name);
326 dbg("looking at '%s'", dev_path);
328 /* open up the sysfs class device for this thing... */
329 class_dev = sysfs_open_class_device_path(dev_path);
330 if (class_dev == NULL) {
331 dbg ("sysfs_open_class_device_path failed");
334 dbg("class_dev->name='%s'", class_dev->name);
340 /* wait for the "dev" file to show up in the directory in sysfs.
341 * If it doesn't happen in about 10 seconds, give up.
343 #define SECONDS_TO_WAIT_FOR_FILE 10
344 static int sleep_for_file(char *path, char* file)
346 char filename[SYSFS_PATH_MAX + 6];
347 int loop = SECONDS_TO_WAIT_FOR_FILE;
350 strfieldcpy(filename, sysfs_path);
351 strfieldcat(filename, path);
352 strfieldcat(filename, file);
357 dbg("looking for '%s'", filename);
358 retval = stat(filename, &buf);
362 /* sleep to give the kernel a chance to create the dev file */
370 static int rename_net_if(struct udevice *dev, int fake)
376 dbg("changing net interface name from '%s' to '%s'", dev->kernel_name, dev->name);
380 sk = socket(PF_INET, SOCK_DGRAM, 0);
382 dbg("error opening socket");
386 memset(&ifr, 0x00, sizeof(struct ifreq));
387 strfieldcpy(ifr.ifr_name, dev->kernel_name);
388 strfieldcpy(ifr.ifr_newname, dev->name);
390 retval = ioctl(sk, SIOCSIFNAME, &ifr);
392 dbg("error changing net interface name");
398 int udev_add_device(char *path, char *subsystem, int fake)
400 struct sysfs_class_device *class_dev;
402 char devpath[DEVPATH_SIZE];
406 memset(&dev, 0x00, sizeof(dev));
408 dev.type = get_device_type(path, subsystem);
412 retval = sleep_for_file(path, "/dev");
416 retval = sleep_for_file(path, "/address");
420 dbg("unknown device type '%c'", dev.type);
424 class_dev = get_class_dev(path);
425 if (class_dev == NULL)
428 if (dev.type == 'b' || dev.type == 'c') {
429 retval = get_major_minor(class_dev, &dev);
431 dbg("get_major_minor failed");
436 if (namedev_name_device(class_dev, &dev) != 0)
439 dbg("name='%s'", dev.name);
444 retval = create_node(&dev, fake);
447 if ((!fake) && (udevdb_add_dev(path, &dev) != 0))
448 dbg("udevdb_add_dev failed, but we are going to try "
449 "to create the node anyway. But remove might not "
450 "work properly for this device.");
452 dev_d_send(&dev, subsystem, path);
456 strfieldcpy(devpath, path);
457 if (strcmp(dev.name, dev.kernel_name) != 0) {
458 retval = rename_net_if(&dev, fake);
461 /* netif's are keyed with the configured name, cause
462 * the original kernel name sleeps with the fishes
464 pos = strrchr(devpath, '/');
467 strfieldcat(devpath, dev.name);
470 if ((!fake) && (udevdb_add_dev(devpath, &dev) != 0))
471 dbg("udevdb_add_dev failed");
473 dev_d_send(&dev, subsystem, devpath);
478 sysfs_close_class_device(class_dev);