* udev_rules.c
*
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
- * Copyright (C) 2003-2005 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2003-2006 Kay Sievers <kay.sievers@vrfy.org>
*
* 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.
return rc;
}
-static int match_name_and_get_number(const char *base, const char *devname)
-{
- size_t baselen;
- char *endptr;
- int num;
-
- baselen = strlen(base);
- if (strncmp(base, devname, baselen) != 0)
- return -1;
- if (devname[baselen] == '\0')
- return 0;
- if (!isdigit(devname[baselen]))
- return -1;
- num = strtoul(&devname[baselen], &endptr, 10);
- if (endptr[0] != '\0')
- return -1;
- return num;
-}
-
-/* finds the lowest positive device number such that <name>N isn't present in the udevdb
- * if <name> doesn't exist, 0 is returned, N otherwise */
-static int find_free_number(const char *base, const char *devpath)
-{
- char db_devpath[PATH_SIZE];
- char filename[PATH_SIZE];
- struct udevice *udev_db;
- int num = 0;
- static int warn = 1;
-
- if (warn) {
- err("%%e is deprecated, will be removed and is unlikely to work correctly. Don't use it.");
- warn = 0;
- }
-
- /* check if the device already owns a matching name */
- udev_db = udev_device_init();
- if (udev_db == NULL)
- return -1;
- if (udev_db_get_device(udev_db, devpath) == 0) {
- struct name_entry *name_loop;
- int devnum;
-
- devnum = match_name_and_get_number(base, udev_db->name);
- if (devnum >= 0) {
- num = devnum;
- dbg("device '%s', already has the node '%s' with num %u, use it", devpath, base, num);
- goto out;
- }
- list_for_each_entry(name_loop, &udev_db->symlink_list, node) {
- devnum = match_name_and_get_number(base, name_loop->name);
- if (devnum >= 0) {
- num = devnum;
- dbg("device '%s', already has a symlink '%s' with num %u, use it", devpath, base, num);
- goto out;
- }
- }
- }
-
- /* just search the database again and again until a free name is found */
- strlcpy(filename, base, sizeof(filename));
- while (1) {
- dbg("look for existing node '%s'", filename);
- if (udev_db_lookup_name(filename, db_devpath, sizeof(db_devpath)) != 0) {
- dbg("free num=%d", num);
- break;
- }
-
- num++;
- if (num > 100000) {
- err("find_free_number aborted at num=%d", num);
- num = -1;
- break;
- }
- snprintf(filename, sizeof(filename), "%s%d", base, num);
- filename[sizeof(filename)-1] = '\0';
- }
-
-out:
- udev_device_cleanup(udev_db);
- return num;
-}
-
#define WAIT_LOOP_PER_SECOND 50
static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout)
{
int len;
int i;
int count;
- unsigned int next_free_number;
enum subst_type {
SUBST_UNKNOWN,
SUBST_DEVPATH,
SUBST_MINOR,
SUBST_RESULT,
SUBST_SYSFS,
- SUBST_ENUM,
SUBST_PARENT,
SUBST_TEMP_NODE,
SUBST_ROOT,
- SUBST_MODALIAS,
SUBST_ENV,
};
static const struct subst_map {
{ .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
{ .name = "result", .fmt = 'c', .type = SUBST_RESULT },
{ .name = "sysfs", .fmt = 's', .type = SUBST_SYSFS },
- { .name = "enum", .fmt = 'e', .type = SUBST_ENUM },
{ .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
{ .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
{ .name = "root", .fmt = 'r', .type = SUBST_ROOT },
- { .name = "modalias", .fmt = 'A', .type = SUBST_MODALIAS },
{ .name = "env", .fmt = 'E', .type = SUBST_ENV },
{ NULL, '\0', 0 }
};
goto found;
}
}
- }
- else if (head[0] == '%') {
+ } else if (head[0] == '%') {
/* substitute format char */
if (head[1] == '\0')
break;
dbg("substitute sysfs value '%s'", temp2);
}
break;
- case SUBST_ENUM:
- next_free_number = find_free_number(string, udev->dev->devpath);
- if (next_free_number > 0) {
- sprintf(temp2, "%d", next_free_number);
- strlcat(string, temp2, maxsize);
- }
- break;
case SUBST_PARENT:
{
struct sysfs_device *dev_parent;
strlcat(string, udev_root, maxsize);
dbg("substitute udev_root '%s'", udev_root);
break;
- case SUBST_MODALIAS:
- {
- const char *value;
- static int warn = 1;
-
- if (warn) {
- err("$modalias is deprecated, use $env{MODALIAS} or "
- "$sysfs{modalias} instead.");
- warn = 0;
- }
-
- value = sysfs_attr_get_value(udev->dev->devpath, "modalias");
- if (value != NULL) {
- strlcat(string, value, maxsize);
- dbg("substitute MODALIAS '%s'", temp2);
- }
- }
- break;
case SUBST_ENV:
if (attr == NULL) {
dbg("missing attribute");
if (match_key("NAME", rule, &rule->name, udev->name))
goto nomatch;
- if (rule->modalias.operation != KEY_OP_UNSET) {
- const char *value;
- static int warn = 1;
-
- if (warn) {
- err("MODALIAS is deprecated, use ENV{MODALIAS} or SYSFS{modalias} instead.");
- warn = 0;
- }
-
- value = sysfs_attr_get_value(udev->dev->devpath, "modalias");
- if (value == NULL) {
- dbg("MODALIAS value not found");
- goto nomatch;
- }
- if (match_key("MODALIAS", rule, &rule->modalias, value))
- goto nomatch;
- }
-
for (i = 0; i < rule->env.count; i++) {
struct key_pair *pair = &rule->env.keys[i];
~ianmdlvl / elogind.git / blobdiff