/*
- * udev_rules.c
- *
- * Userspace devfs
- *
* 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.
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <ctype.h>
#include <unistd.h>
#include <errno.h>
+#include <syslog.h>
+#include <fnmatch.h>
#include <sys/wait.h>
#include <sys/stat.h>
-#include "libsysfs/sysfs/libsysfs.h"
-#include "list.h"
-#include "udev_libc_wrapper.h"
#include "udev.h"
-#include "udev_utils.h"
-#include "udev_version.h"
-#include "logging.h"
#include "udev_rules.h"
-#include "udev_db.h"
-
-/* compare string with pattern (supports * ? [0-9] [!A-Z]) */
-static int strcmp_pattern(const char *p, const char *s)
-{
- if (s[0] == '\0') {
- while (p[0] == '*')
- p++;
- return (p[0] != '\0');
- }
- switch (p[0]) {
- case '[':
- {
- int not = 0;
- p++;
- if (p[0] == '!') {
- not = 1;
- p++;
- }
- while ((p[0] != '\0') && (p[0] != ']')) {
- int match = 0;
- if (p[1] == '-') {
- if ((s[0] >= p[0]) && (s[0] <= p[2]))
- match = 1;
- p += 3;
- } else {
- match = (p[0] == s[0]);
- p++;
- }
- if (match ^ not) {
- while ((p[0] != '\0') && (p[0] != ']'))
- p++;
- if (p[0] == ']')
- return strcmp_pattern(p+1, s+1);
- }
- }
- }
- break;
- case '*':
- if (strcmp_pattern(p, s+1))
- return strcmp_pattern(p+1, s);
- return 0;
- case '\0':
- if (s[0] == '\0') {
- return 0;
- }
- break;
- default:
- if ((p[0] == s[0]) || (p[0] == '?'))
- return strcmp_pattern(p+1, s+1);
- break;
- }
- return 1;
-}
/* extract possible {attr} and move str behind it */
static char *get_format_attribute(char **str)
if (bufline[0] == COMMENT_CHARACTER)
continue;
- strlcpy(line, bufline, count+1);
+ memcpy(line, bufline, count);
+ line[count] = '\0';
linepos = line;
if (get_key(&linepos, &variable, &value) == 0) {
dbg("import '%s=%s'", variable, value);
- name_list_key_add(&udev->env_list, variable, value);
+
+ /* handle device, renamed by external tool, returning new path */
+ if (strcmp(variable, "DEVPATH") == 0) {
+ info("updating devpath from '%s' to '%s'", udev->dev->devpath, value);
+ sysfs_device_set_values(udev->dev, value, NULL, NULL);
+ } else
+ name_list_key_add(&udev->env_list, variable, value);
setenv(variable, value, 1);
}
}
size_t bufsize;
if (file_map(filename, &buf, &bufsize) != 0) {
- err("can't open '%s'", filename);
+ err("can't open '%s': %s", filename, strerror(errno));
return -1;
}
import_keys_into_env(udev, buf, bufsize);
char result[1024];
size_t reslen;
- if (execute_program(program, udev->subsystem, result, sizeof(result), &reslen) != 0)
+ if (run_program(program, udev->dev->subsystem, result, sizeof(result), &reslen, (udev_log_priority >= LOG_INFO)) != 0)
return -1;
return import_keys_into_env(udev, result, reslen);
}
-/* finds the lowest positive N 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(struct udevice *udev, const char *name)
+static int import_parent_into_env(struct udevice *udev, const char *filter)
{
- char devpath[PATH_SIZE];
- char filename[PATH_SIZE];
- int num = 0;
+ struct sysfs_device *dev_parent;
+ int rc = -1;
- strlcpy(filename, name, sizeof(filename));
- while (1) {
- dbg("look for existing node '%s'", filename);
- if (udev_db_search_name(devpath, sizeof(devpath), filename) != 0) {
- dbg("free num=%d", num);
- return num;
- }
+ dev_parent = sysfs_device_get_parent(udev->dev);
+ if (dev_parent != NULL) {
+ struct udevice *udev_parent;
+ struct name_entry *name_loop;
- num++;
- if (num > 1000) {
- info("find_free_number gone crazy (num=%d), aborted", num);
+ dbg("found parent '%s', get the node name", dev_parent->devpath);
+ udev_parent = udev_device_init(NULL);
+ if (udev_parent == NULL)
return -1;
- }
- snprintf(filename, sizeof(filename), "%s%d", name, num);
- filename[sizeof(filename)-1] = '\0';
- }
-}
-
-static int find_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device,
- const char *name, char *value, size_t len)
-{
- struct sysfs_attribute *tmpattr;
-
- dbg("look for device attribute '%s'", name);
- if (class_dev) {
- dbg("look for class attribute '%s/%s'", class_dev->path, name);
- tmpattr = sysfs_get_classdev_attr(class_dev, name);
- if (tmpattr)
- goto attr_found;
- }
- if (sysfs_device) {
- dbg("look for devices attribute '%s/%s'", sysfs_device->path, name);
- tmpattr = sysfs_get_device_attr(sysfs_device, name);
- if (tmpattr)
- goto attr_found;
+ /* import the udev_db of the parent */
+ if (udev_db_get_device(udev_parent, dev_parent->devpath) == 0) {
+ dbg("import stored parent env '%s'", udev_parent->name);
+ list_for_each_entry(name_loop, &udev_parent->env_list, node) {
+ char name[NAME_SIZE];
+ char *pos;
+
+ strlcpy(name, name_loop->name, sizeof(name));
+ pos = strchr(name, '=');
+ if (pos) {
+ pos[0] = '\0';
+ pos++;
+ if (fnmatch(filter, name, 0) == 0) {
+ dbg("import key '%s'", name_loop->name);
+ name_list_add(&udev->env_list, name_loop->name, 0);
+ setenv(name, pos, 1);
+ } else
+ dbg("skip key '%s'", name_loop->name);
+ }
+ }
+ rc = 0;
+ } else
+ dbg("parent not found in database");
+ udev_device_cleanup(udev_parent);
}
- return -1;
-attr_found:
- strlcpy(value, tmpattr->value, len);
- remove_trailing_char(value, '\n');
-
- dbg("found attribute '%s'", tmpattr->path);
- return 0;
+ return rc;
}
-#define WAIT_LOOP_PER_SECOND 20
+#define WAIT_LOOP_PER_SECOND 50
static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout)
{
- char filename[PATH_SIZE];
+ char devicepath[PATH_SIZE];
+ char filepath[PATH_SIZE];
struct stat stats;
int loop = timeout * WAIT_LOOP_PER_SECOND;
- snprintf(filename, sizeof(filename), "%s%s/%s", sysfs_path, udev->devpath, file);
- filename[sizeof(filename)-1] = '\0';
- dbg("wait %i sec for '%s'", timeout, filename);
+ strlcpy(devicepath, sysfs_path, sizeof(devicepath));
+ strlcat(devicepath, udev->dev->devpath, sizeof(devicepath));
+ strlcpy(filepath, devicepath, sizeof(filepath));
+ strlcat(filepath, "/", sizeof(filepath));
+ strlcat(filepath, file, sizeof(filepath));
+ dbg("will wait %i sec for '%s'", timeout, filepath);
while (--loop) {
- if (stat(filename, &stats) == 0) {
- dbg("file appeared after %i loops", (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
+ /* lookup file */
+ if (stat(filepath, &stats) == 0) {
+ info("file '%s' appeared after %i loops", filepath, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
return 0;
}
+ /* make sure, the device did not disappear in the meantime */
+ if (stat(devicepath, &stats) != 0) {
+ info("device disappeared while waiting for '%s'", filepath);
+ return -2;
+ }
+ info("wait for '%s' for %i mseconds", filepath, 1000 / WAIT_LOOP_PER_SECOND);
usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
}
- dbg("waiting for '%s' failed", filename);
+ err("waiting for '%s' failed", filepath);
return -1;
}
-static void apply_format(struct udevice *udev, char *string, size_t maxsize,
- struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
+void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize)
{
char temp[PATH_SIZE];
char temp2[PATH_SIZE];
char *head, *tail, *pos, *cpos, *attr, *rest;
int len;
int i;
- unsigned int next_free_number;
- struct sysfs_class_device *class_dev_parent;
+ int count;
enum subst_type {
SUBST_UNKNOWN,
SUBST_DEVPATH,
- SUBST_ID,
+ SUBST_KERNEL,
SUBST_KERNEL_NUMBER,
- SUBST_KERNEL_NAME,
+ SUBST_ID,
SUBST_MAJOR,
SUBST_MINOR,
SUBST_RESULT,
- SUBST_SYSFS,
- SUBST_ENUM,
+ SUBST_ATTR,
SUBST_PARENT,
SUBST_TEMP_NODE,
SUBST_ROOT,
- SUBST_MODALIAS,
SUBST_ENV,
};
static const struct subst_map {
char fmt;
enum subst_type type;
} map[] = {
- { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
- { .name = "id", .fmt = 'b', .type = SUBST_ID },
- { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
- { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL_NAME },
- { .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
- { .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 },
- {}
+ { .name = "devpath", .fmt = 'p', .type = SUBST_DEVPATH },
+ { .name = "number", .fmt = 'n', .type = SUBST_KERNEL_NUMBER },
+ { .name = "kernel", .fmt = 'k', .type = SUBST_KERNEL },
+ { .name = "id", .fmt = 'b', .type = SUBST_ID },
+ { .name = "major", .fmt = 'M', .type = SUBST_MAJOR },
+ { .name = "minor", .fmt = 'm', .type = SUBST_MINOR },
+ { .name = "result", .fmt = 'c', .type = SUBST_RESULT },
+ { .name = "attr", .fmt = 's', .type = SUBST_ATTR },
+ { .name = "sysfs", .fmt = 's', .type = SUBST_ATTR },
+ { .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
+ { .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
+ { .name = "root", .fmt = 'r', .type = SUBST_ROOT },
+ { .name = "env", .fmt = 'E', .type = SUBST_ENV },
+ { NULL, '\0', 0 }
};
enum subst_type type;
const struct subst_map *subst;
goto found;
}
}
- }
- else if (head[0] == '%') {
+ head[0] = '$';
+ err("unknown format variable '%s'", head);
+ } else if (head[0] == '%') {
/* substitute format char */
if (head[1] == '\0')
break;
goto found;
}
}
+ head[0] = '%';
+ err("unknown format char '%c'", tail[0]);
}
head++;
}
found:
attr = get_format_attribute(&tail);
strlcpy(temp, tail, sizeof(temp));
- dbg("format=%i, string='%s', tail='%s', class_dev=%p, sysfs_dev=%p",
- type ,string, tail, class_dev, sysfs_device);
+ dbg("format=%i, string='%s', tail='%s'", type ,string, tail);
switch (type) {
case SUBST_DEVPATH:
- strlcat(string, udev->devpath, maxsize);
- dbg("substitute devpath '%s'", udev->devpath);
- break;
- case SUBST_ID:
- strlcat(string, udev->bus_id, maxsize);
- dbg("substitute bus_id '%s'", udev->bus_id);
+ strlcat(string, udev->dev->devpath, maxsize);
+ dbg("substitute devpath '%s'", udev->dev->devpath);
break;
- case SUBST_KERNEL_NAME:
- strlcat(string, udev->kernel_name, maxsize);
- dbg("substitute kernel name '%s'", udev->kernel_name);
+ case SUBST_KERNEL:
+ strlcat(string, udev->dev->kernel, maxsize);
+ dbg("substitute kernel name '%s'", udev->dev->kernel);
break;
case SUBST_KERNEL_NUMBER:
- strlcat(string, udev->kernel_number, maxsize);
- dbg("substitute kernel number '%s'", udev->kernel_number);
+ strlcat(string, udev->dev->kernel_number, maxsize);
+ dbg("substitute kernel number '%s'", udev->dev->kernel_number);
+ break;
+ case SUBST_ID:
+ if (udev->dev_parent != NULL) {
+ strlcat(string, udev->dev_parent->kernel, maxsize);
+ dbg("substitute id '%s'", udev->dev_parent->kernel);
+ }
break;
case SUBST_MAJOR:
sprintf(temp2, "%d", major(udev->devt));
dbg("substitute result string '%s'", udev->program_result);
}
break;
- case SUBST_SYSFS:
- if (attr == NULL) {
- dbg("missing attribute");
- break;
- }
- if (find_sysfs_attribute(class_dev, sysfs_device, attr, temp2, sizeof(temp2)) != 0) {
- struct sysfs_device *parent_device;
-
- dbg("sysfs attribute '%s' not found, walk up the physical devices", attr);
- parent_device = sysfs_get_device_parent(sysfs_device);
- while (parent_device) {
- dbg("looking at '%s'", parent_device->path);
- if (find_sysfs_attribute(NULL, parent_device, attr, temp2, sizeof(temp2)) == 0)
- break;
- parent_device = sysfs_get_device_parent(parent_device);
+ case SUBST_ATTR:
+ if (attr == NULL)
+ err("missing file parameter for attr");
+ else {
+ const char *value = NULL;
+ size_t size;
+
+ /* first try the current device, other matches may have selected */
+ if (udev->dev_parent != NULL && udev->dev_parent != udev->dev)
+ value = sysfs_attr_get_value(udev->dev_parent->devpath, attr);
+
+ /* look at all devices along the chain of parents */
+ if (value == NULL) {
+ struct sysfs_device *dev_parent = udev->dev;
+
+ do {
+ dbg("looking at '%s'", dev_parent->devpath);
+ value = sysfs_attr_get_value(dev_parent->devpath, attr);
+ if (value != NULL) {
+ strlcpy(temp2, value, sizeof(temp2));
+ break;
+ }
+ dev_parent = sysfs_device_get_parent(dev_parent);
+ } while (dev_parent != NULL);
}
- if (!parent_device)
+
+ if (value == NULL)
break;
- }
- /* strip trailing whitespace of sysfs value */
- i = strlen(temp2);
- while (i > 0 && isspace(temp2[i-1]))
- temp2[--i] = '\0';
- replace_untrusted_chars(temp2);
- strlcat(string, temp2, maxsize);
- dbg("substitute sysfs value '%s'", temp2);
- break;
- case SUBST_ENUM:
- next_free_number = find_free_number(udev, string);
- if (next_free_number > 0) {
- sprintf(temp2, "%d", next_free_number);
+
+ /* strip trailing whitespace and replace untrusted characters of sysfs value */
+ size = strlcpy(temp2, value, sizeof(temp2));
+ if (size >= sizeof(temp2))
+ size = sizeof(temp2)-1;
+ while (size > 0 && isspace(temp2[size-1]))
+ temp2[--size] = '\0';
+ count = replace_untrusted_chars(temp2);
+ if (count > 0)
+ info("%i untrusted character(s) replaced" , count);
strlcat(string, temp2, maxsize);
+ dbg("substitute sysfs value '%s'", temp2);
}
break;
case SUBST_PARENT:
- if (!class_dev)
- break;
- class_dev_parent = sysfs_get_classdev_parent(class_dev);
- if (class_dev_parent != NULL) {
- struct udevice udev_parent;
-
- dbg("found parent '%s', get the node name", class_dev_parent->path);
- udev_init_device(&udev_parent, NULL, NULL, NULL);
- /* lookup the name in the udev_db with the DEVPATH of the parent */
- if (udev_db_get_device(&udev_parent, &class_dev_parent->path[strlen(sysfs_path)]) == 0) {
- strlcat(string, udev_parent.name, maxsize);
- dbg("substitute parent node name'%s'", udev_parent.name);
- } else
- dbg("parent not found in database");
- udev_cleanup_device(&udev_parent);
+ {
+ struct sysfs_device *dev_parent;
+
+ dev_parent = sysfs_device_get_parent(udev->dev);
+ if (dev_parent != NULL) {
+ struct udevice *udev_parent;
+
+ dbg("found parent '%s', get the node name", dev_parent->devpath);
+ udev_parent = udev_device_init(NULL);
+ if (udev_parent != NULL) {
+ /* lookup the name in the udev_db with the DEVPATH of the parent */
+ if (udev_db_get_device(udev_parent, dev_parent->devpath) == 0) {
+ strlcat(string, udev_parent->name, maxsize);
+ dbg("substitute parent node name'%s'", udev_parent->name);
+ } else
+ dbg("parent not found in database");
+ udev_device_cleanup(udev_parent);
+ }
+ }
}
break;
case SUBST_TEMP_NODE:
- if (udev->tmp_node[0] == '\0') {
+ if (udev->tmp_node[0] == '\0' && major(udev->devt) > 0) {
dbg("create temporary device node for callout");
snprintf(udev->tmp_node, sizeof(udev->tmp_node), "%s/.tmp-%u-%u",
udev_root, major(udev->devt), minor(udev->devt));
udev->tmp_node[sizeof(udev->tmp_node)-1] = '\0';
- udev_make_node(udev, udev->tmp_node, udev->devt, 0600, 0, 0);
+ udev_node_mknod(udev, udev->tmp_node, udev->devt, 0600, 0, 0);
}
strlcat(string, udev->tmp_node, maxsize);
dbg("substitute temporary device node name '%s'", udev->tmp_node);
strlcat(string, udev_root, maxsize);
dbg("substitute udev_root '%s'", udev_root);
break;
- case SUBST_MODALIAS:
- if (find_sysfs_attribute(NULL, sysfs_device, "modalias", temp2, sizeof(temp2)) != 0)
- break;
- strlcat(string, temp2, maxsize);
- dbg("substitute MODALIAS '%s'", temp2);
- break;
case SUBST_ENV:
if (attr == NULL) {
dbg("missing attribute");
break;
}
pos = getenv(attr);
- if (pos == NULL)
+ if (pos == NULL) {
+ dbg("env '%s' not available", attr);
break;
- strlcat(string, pos, maxsize);
+ }
dbg("substitute env '%s=%s'", attr, pos);
+ strlcat(string, pos, maxsize);
break;
default:
err("unknown substitution type=%i", type);
break;
}
/* possibly truncate to format-char specified length */
- if (len != -1) {
+ if (len >= 0 && len < (int)strlen(head)) {
head[len] = '\0';
dbg("truncate to %i chars, subtitution string becomes '%s'", len, head);
}
static int match_key(const char *key_name, struct udev_rule *rule, struct key *key, const char *val)
{
- int match;
+ char value[PATH_SIZE];
char *key_value;
+ char *pos;
+ int match = 0;
- if (key->operation == KEY_OP_UNSET)
+ if (key->operation != KEY_OP_MATCH &&
+ key->operation != KEY_OP_NOMATCH)
return 0;
- key_value = rule->buf + key->val_off;
+ /* look for a matching string, parts are separated by '|' */
+ strlcpy(value, rule->buf + key->val_off, sizeof(value));
+ key_value = value;
+ dbg("key %s value='%s'", key_name, key_value);
+ while (key_value) {
+ pos = strchr(key_value, '|');
+ if (pos) {
+ pos[0] = '\0';
+ pos++;
+ }
+
+ dbg("match %s '%s' <-> '%s'", key_name, key_value, val);
+ match = (fnmatch(key_value, val, 0) == 0);
+ if (match)
+ break;
- dbg("check for %s '%s' <-> '%s'", key_name, key_value, val);
- match = (strcmp_pattern(key_value, val) == 0);
- if (match && (key->operation != KEY_OP_NOMATCH)) {
- dbg("%s is matching (matching value)", key_name);
+ key_value = pos;
+ }
+
+ if (match && (key->operation == KEY_OP_MATCH)) {
+ dbg("%s is true (matching value)", key_name);
return 0;
}
if (!match && (key->operation == KEY_OP_NOMATCH)) {
- dbg("%s is matching, (non matching value)", key_name);
+ dbg("%s is true (non-matching value)", key_name);
return 0;
}
-
- dbg("%s is not matching", key_name);
return -1;
}
-static int match_rule(struct udevice *udev, struct udev_rule *rule,
- struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
+/* match a single rule against a given device and possibly its parent devices */
+static int match_rule(struct udevice *udev, struct udev_rule *rule)
{
- struct sysfs_device *parent_device = sysfs_device;
+ int i;
if (match_key("ACTION", rule, &rule->action, udev->action))
- goto exit;
+ goto nomatch;
- if (match_key("KERNEL", rule, &rule->kernel_name, udev->kernel_name))
- goto exit;
+ if (match_key("KERNEL", rule, &rule->kernel, udev->dev->kernel))
+ goto nomatch;
- if (match_key("SUBSYSTEM", rule, &rule->subsystem, udev->subsystem))
- goto exit;
+ if (match_key("SUBSYSTEM", rule, &rule->subsystem, udev->dev->subsystem))
+ goto nomatch;
- if (match_key("DEVPATH", rule, &rule->devpath, udev->devpath))
- goto exit;
+ if (match_key("DEVPATH", rule, &rule->devpath, udev->dev->devpath))
+ goto nomatch;
- if (rule->modalias.operation != KEY_OP_UNSET) {
- char value[NAME_SIZE];
+ if (match_key("DRIVER", rule, &rule->driver, udev->dev->driver))
+ goto nomatch;
- if (find_sysfs_attribute(NULL, sysfs_device, "modalias", value, sizeof(value)) != 0) {
- dbg("MODALIAS value not found");
- goto exit;
- }
- if (match_key("MODALIAS", rule, &rule->modalias, value))
- goto exit;
- }
+ /* match NAME against a value assigned by an earlier rule */
+ if (match_key("NAME", rule, &rule->name, udev->name))
+ goto nomatch;
- if (rule->env.count) {
- int i;
+ for (i = 0; i < rule->env.count; i++) {
+ struct key_pair *pair = &rule->env.keys[i];
- dbg("check %i ENV keys", rule->env.count);
- for (i = 0; i < rule->env.count; i++) {
- struct key_pair *pair = &rule->env.keys[i];
+ /* we only check for matches, assignments will be handled later */
+ if (pair->key.operation == KEY_OP_MATCH ||
+ pair->key.operation == KEY_OP_NOMATCH) {
const char *key_name = key_pair_name(rule, pair);
const char *value = getenv(key_name);
if (!value) {
- dbg("ENV{'%s'} is not found", key_name);
- goto exit;
+ dbg("ENV{'%s'} is not set, treat as empty", key_name);
+ value = "";
}
if (match_key("ENV", rule, &pair->key, value))
- goto exit;
+ goto nomatch;
}
- dbg("all %i ENV keys matched", rule->env.count);
}
if (rule->wait_for_sysfs.operation != KEY_OP_UNSET) {
- int match;
+ int found;
- match = (wait_for_sysfs(udev, key_val(rule, &rule->wait_for_sysfs), 3) == 0);
- if (match && (rule->wait_for_sysfs.operation != KEY_OP_NOMATCH)) {
- dbg("WAIT_FOR_SYSFS is matching (matching value)");
- return 0;
- }
- if (!match && (rule->wait_for_sysfs.operation == KEY_OP_NOMATCH)) {
- dbg("WAIT_FOR_SYSFS is matching, (non matching value)");
- return 0;
- }
- dbg("WAIT_FOR_SYSFS is not matching");
- return -1;
+ found = (wait_for_sysfs(udev, key_val(rule, &rule->wait_for_sysfs), 3) == 0);
+ if (!found && (rule->wait_for_sysfs.operation != KEY_OP_NOMATCH))
+ goto nomatch;
}
- /* walk up the chain of physical devices and find a match */
- while (1) {
- /* check for matching driver */
- if (rule->driver.operation != KEY_OP_UNSET) {
- if (parent_device == NULL) {
- dbg("device has no sysfs_device");
- goto exit;
- }
- if (match_key("DRIVER", rule, &rule->driver, parent_device->driver_name))
- goto try_parent;
- }
+ /* check for matching sysfs attribute pairs */
+ for (i = 0; i < rule->attr.count; i++) {
+ struct key_pair *pair = &rule->attr.keys[i];
- /* check for matching bus value */
- if (rule->bus.operation != KEY_OP_UNSET) {
- if (parent_device == NULL) {
- dbg("device has no sysfs_device");
- goto exit;
+ if (pair->key.operation == KEY_OP_MATCH ||
+ pair->key.operation == KEY_OP_NOMATCH) {
+ const char *key_name = key_pair_name(rule, pair);
+ const char *key_value = key_val(rule, &pair->key);
+ const char *value;
+ char val[VALUE_SIZE];
+ size_t len;
+
+ value = sysfs_attr_get_value(udev->dev->devpath, key_name);
+ if (value == NULL)
+ goto nomatch;
+ strlcpy(val, value, sizeof(val));
+
+ /* strip trailing whitespace of value, if not asked to match for it */
+ len = strlen(key_value);
+ if (len > 0 && !isspace(key_value[len-1])) {
+ len = strlen(val);
+ while (len > 0 && isspace(val[len-1]))
+ val[--len] = '\0';
+ dbg("removed %zi trailing whitespace chars from '%s'", strlen(val)-len, val);
}
- if (match_key("BUS", rule, &rule->bus, parent_device->bus))
- goto try_parent;
- }
- /* check for matching bus id */
- if (rule->id.operation != KEY_OP_UNSET) {
- if (parent_device == NULL) {
- dbg("device has no sysfs_device");
- goto exit;
- }
- if (match_key("ID", rule, &rule->id, parent_device->bus_id))
- goto try_parent;
+ if (match_key("ATTR", rule, &pair->key, val))
+ goto nomatch;
}
+ }
+
+ /* walk up the chain of parent devices and find a match */
+ udev->dev_parent = udev->dev;
+ while (1) {
+ /* check for matching kernel device name */
+ if (match_key("KERNELS", rule, &rule->kernels, udev->dev_parent->kernel))
+ goto try_parent;
+
+ /* check for matching subsystem value */
+ if (match_key("SUBSYSTEMS", rule, &rule->subsystems, udev->dev_parent->subsystem))
+ goto try_parent;
+
+ /* check for matching driver */
+ if (match_key("DRIVERS", rule, &rule->drivers, udev->dev_parent->driver))
+ goto try_parent;
- /* check for matching sysfs pairs */
- if (rule->sysfs.count) {
- int i;
+ /* check for matching sysfs attribute pairs */
+ for (i = 0; i < rule->attrs.count; i++) {
+ struct key_pair *pair = &rule->attrs.keys[i];
- dbg("check %i SYSFS keys", rule->sysfs.count);
- for (i = 0; i < rule->sysfs.count; i++) {
- struct key_pair *pair = &rule->sysfs.keys[i];
+ if (pair->key.operation == KEY_OP_MATCH ||
+ pair->key.operation == KEY_OP_NOMATCH) {
const char *key_name = key_pair_name(rule, pair);
const char *key_value = key_val(rule, &pair->key);
- char value[VALUE_SIZE];
+ const char *value;
+ char val[VALUE_SIZE];
size_t len;
- if (find_sysfs_attribute(class_dev, parent_device, key_name, value, sizeof(value)) != 0)
+ value = sysfs_attr_get_value(udev->dev_parent->devpath, key_name);
+ if (value == NULL)
+ value = sysfs_attr_get_value(udev->dev->devpath, key_name);
+ if (value == NULL)
goto try_parent;
+ strlcpy(val, value, sizeof(val));
/* strip trailing whitespace of value, if not asked to match for it */
len = strlen(key_value);
- if (len && !isspace(key_value[len-1])) {
- len = strlen(value);
- while (len > 0 && isspace(value[len-1]))
- value[--len] = '\0';
- dbg("removed %zi trailing whitespace chars from '%s'", strlen(value)-len, value);
+ if (len > 0 && !isspace(key_value[len-1])) {
+ len = strlen(val);
+ while (len > 0 && isspace(val[len-1]))
+ val[--len] = '\0';
+ dbg("removed %zi trailing whitespace chars from '%s'", strlen(val)-len, val);
}
- if (match_key("SYSFS", rule, &pair->key, value))
+ if (match_key("ATTRS", rule, &pair->key, val))
goto try_parent;
}
- dbg("all %i SYSFS keys matched", rule->sysfs.count);
}
- /* found matching physical device */
+ /* found matching device */
break;
try_parent:
+ /* move to parent device */
dbg("try parent sysfs device");
- parent_device = sysfs_get_device_parent(parent_device);
- if (parent_device == NULL)
- goto exit;
- dbg("look at sysfs_device->path='%s'", parent_device->path);
- dbg("look at sysfs_device->bus_id='%s'", parent_device->bus_id);
+ udev->dev_parent = sysfs_device_get_parent(udev->dev_parent);
+ if (udev->dev_parent == NULL)
+ goto nomatch;
+ dbg("looking at dev_parent->devpath='%s'", udev->dev_parent->devpath);
+ dbg("looking at dev_parent->kernel='%s'", udev->dev_parent->kernel);
}
- /* import variables from file into environment */
+ /* execute external program */
+ if (rule->program.operation != KEY_OP_UNSET) {
+ char program[PATH_SIZE];
+ char result[PATH_SIZE];
+
+ strlcpy(program, key_val(rule, &rule->program), sizeof(program));
+ udev_rules_apply_format(udev, program, sizeof(program));
+ if (run_program(program, udev->dev->subsystem, result, sizeof(result), NULL, (udev_log_priority >= LOG_INFO)) != 0) {
+ dbg("PROGRAM is false");
+ udev->program_result[0] = '\0';
+ if (rule->program.operation != KEY_OP_NOMATCH)
+ goto nomatch;
+ } else {
+ int count;
+
+ dbg("PROGRAM matches");
+ remove_trailing_chars(result, '\n');
+ count = replace_untrusted_chars(result);
+ if (count)
+ info("%i untrusted character(s) replaced" , count);
+ dbg("result is '%s'", result);
+ strlcpy(udev->program_result, result, sizeof(udev->program_result));
+ dbg("PROGRAM returned successful");
+ if (rule->program.operation == KEY_OP_NOMATCH)
+ goto nomatch;
+ }
+ dbg("PROGRAM key is true");
+ }
+
+ /* check for matching result of external program */
+ if (match_key("RESULT", rule, &rule->result, udev->program_result))
+ goto nomatch;
+
+ /* import variables returned from program or or file into environment */
if (rule->import.operation != KEY_OP_UNSET) {
char import[PATH_SIZE];
int rc = -1;
strlcpy(import, key_val(rule, &rule->import), sizeof(import));
- apply_format(udev, import, sizeof(import), class_dev, sysfs_device);
+ udev_rules_apply_format(udev, import, sizeof(import));
dbg("check for IMPORT import='%s'", import);
- if (rule->import_exec) {
- dbg("run executable file import='%s'", import);
+ if (rule->import_type == IMPORT_PROGRAM) {
rc = import_program_into_env(udev, import);
- } else {
+ } else if (rule->import_type == IMPORT_FILE) {
dbg("import file import='%s'", import);
rc = import_file_into_env(udev, import);
+ } else if (rule->import_type == IMPORT_PARENT) {
+ dbg("import parent import='%s'", import);
+ rc = import_parent_into_env(udev, import);
}
- if (rc) {
+ if (rc != 0) {
dbg("IMPORT failed");
if (rule->import.operation != KEY_OP_NOMATCH)
- goto exit;
+ goto nomatch;
} else
dbg("IMPORT '%s' imported", key_val(rule, &rule->import));
dbg("IMPORT key is true");
}
- /* execute external program */
- if (rule->program.operation != KEY_OP_UNSET) {
- char program[PATH_SIZE];
- char result[PATH_SIZE];
+ /* rule matches, if we have ENV assignments export it */
+ for (i = 0; i < rule->env.count; i++) {
+ struct key_pair *pair = &rule->env.keys[i];
- strlcpy(program, key_val(rule, &rule->program), sizeof(program));
- apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
- dbg("check for PROGRAM program='%s", program);
- if (execute_program(program, udev->subsystem, result, sizeof(result), NULL) != 0) {
- dbg("PROGRAM is not matching");
- if (rule->program.operation != KEY_OP_NOMATCH)
- goto exit;
- } else {
- dbg("PROGRAM matches");
- remove_trailing_char(result, '\n');
- replace_untrusted_chars(result);
- dbg("result is '%s'", result);
- strlcpy(udev->program_result, result, sizeof(udev->program_result));
- dbg("PROGRAM returned successful");
- if (rule->program.operation == KEY_OP_NOMATCH)
- goto exit;
+ if (pair->key.operation == KEY_OP_ASSIGN) {
+ char temp_value[NAME_SIZE];
+ const char *key_name = key_pair_name(rule, pair);
+ const char *value = key_val(rule, &pair->key);
+
+ /* make sure we don't write to the same string we possibly read from */
+ strlcpy(temp_value, value, sizeof(temp_value));
+ udev_rules_apply_format(udev, temp_value, NAME_SIZE);
+
+ if (temp_value[0] == '\0') {
+ name_list_key_remove(&udev->env_list, key_name);
+ unsetenv(key_name);
+ info("unset ENV '%s'", key_name);
+ } else {
+ char *key_value = name_list_key_add(&udev->env_list, key_name, temp_value);
+
+ if (key_value == NULL)
+ break;
+ putenv(key_value);
+ info("set ENV '%s'", key_value);
+ }
}
- dbg("PROGRAM key is true");
}
- /* check for matching result of external program */
- if (match_key("RESULT", rule, &rule->result, udev->program_result))
- goto exit;
+ /* if we have ATTR assignements write value to sysfs file */
+ for (i = 0; i < rule->attr.count; i++) {
+ struct key_pair *pair = &rule->attr.keys[i];
- /* rule matches */
+ if (pair->key.operation == KEY_OP_ASSIGN) {
+ const char *key_name = key_pair_name(rule, pair);
+ char attr[PATH_SIZE];
+ char value[NAME_SIZE];
+ FILE *f;
+
+ strlcpy(attr, sysfs_path, sizeof(attr));
+ strlcat(attr, udev->dev->devpath, sizeof(attr));
+ strlcat(attr, "/", sizeof(attr));
+ strlcat(attr, key_name, sizeof(attr));
+ strlcpy(value, key_val(rule, &pair->key), sizeof(value));
+ udev_rules_apply_format(udev, value, sizeof(value));
+ info("writing '%s' to sysfs file '%s'", value, attr);
+ f = fopen(attr, "w");
+ if (f != NULL) {
+ if (!udev->test_run)
+ if (fprintf(f, "%s", value) <= 0)
+ err("error writing ATTR{%s}: %s", attr, strerror(errno));
+ fclose(f);
+ } else
+ err("error opening ATTR{%s} for writing: %s", attr, strerror(errno));
+ }
+ }
return 0;
-exit:
+nomatch:
return -1;
}
-int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev, struct sysfs_class_device *class_dev)
+int udev_rules_get_name(struct udev_rules *rules, struct udevice *udev)
{
- struct sysfs_class_device *class_dev_parent;
- struct sysfs_device *sysfs_device = NULL;
struct udev_rule *rule;
int name_set = 0;
- dbg("class_dev->name='%s'", class_dev->name);
-
- /* Figure out where the "device"-symlink is at. For char devices this will
- * always be in the class_dev->path. On block devices, only the main block
- * device will have the device symlink in it's path. All partition devices
- * need to look at the symlink in its parent directory.
- */
- class_dev_parent = sysfs_get_classdev_parent(class_dev);
- if (class_dev_parent != NULL) {
- dbg("given class device has a parent, use this instead");
- sysfs_device = sysfs_get_classdev_device(class_dev_parent);
- } else {
- sysfs_device = sysfs_get_classdev_device(class_dev);
- }
-
- if (sysfs_device) {
- dbg("found devices device: path='%s', bus_id='%s', bus='%s'",
- sysfs_device->path, sysfs_device->bus_id, sysfs_device->bus);
- strlcpy(udev->bus_id, sysfs_device->bus_id, sizeof(udev->bus_id));
- }
-
- dbg("udev->kernel_name='%s'", udev->kernel_name);
+ dbg("udev->dev->devpath='%s'", udev->dev->devpath);
+ dbg("udev->dev->kernel='%s'", udev->dev->kernel);
/* look for a matching rule to apply */
udev_rules_iter_init(rules);
if (rule == NULL)
break;
- if (name_set && rule->name.operation != KEY_OP_UNSET) {
+ if (name_set &&
+ (rule->name.operation == KEY_OP_ASSIGN ||
+ rule->name.operation == KEY_OP_ASSIGN_FINAL ||
+ rule->name.operation == KEY_OP_ADD)) {
dbg("node name already set, rule ignored");
continue;
}
dbg("process rule");
- if (match_rule(udev, rule, class_dev, sysfs_device) == 0) {
+ if (match_rule(udev, rule) == 0) {
/* apply options */
if (rule->ignore_device) {
- info("rule applied, '%s' is ignored", udev->kernel_name);
+ info("rule applied, '%s' is ignored", udev->dev->kernel);
udev->ignore_device = 1;
return 0;
}
udev->ignore_remove = 1;
dbg("remove event should be ignored");
}
+ if (rule->link_priority != 0) {
+ udev->link_priority = rule->link_priority;
+ info("link_priority=%i", udev->link_priority);
+ }
/* apply all_partitions option only at a main block device */
- if (rule->partitions && udev->type == DEV_BLOCK && udev->kernel_number[0] == '\0') {
+ if (rule->partitions &&
+ strcmp(udev->dev->subsystem, "block") == 0 && udev->dev->kernel_number[0] == '\0') {
udev->partitions = rule->partitions;
dbg("creation of partition nodes requested");
}
if (rule->mode_operation == KEY_OP_ASSIGN_FINAL)
udev->mode_final = 1;
udev->mode = rule->mode;
- dbg("applied mode=%#o to '%s'", rule->mode, udev->kernel_name);
+ dbg("applied mode=%#o to '%s'", rule->mode, udev->dev->kernel);
}
if (!udev->owner_final && rule->owner.operation != KEY_OP_UNSET) {
if (rule->owner.operation == KEY_OP_ASSIGN_FINAL)
udev->owner_final = 1;
strlcpy(udev->owner, key_val(rule, &rule->owner), sizeof(udev->owner));
- apply_format(udev, udev->owner, sizeof(udev->owner), class_dev, sysfs_device);
- dbg("applied owner='%s' to '%s'", udev->owner, udev->kernel_name);
+ udev_rules_apply_format(udev, udev->owner, sizeof(udev->owner));
+ dbg("applied owner='%s' to '%s'", udev->owner, udev->dev->kernel);
}
if (!udev->group_final && rule->group.operation != KEY_OP_UNSET) {
if (rule->group.operation == KEY_OP_ASSIGN_FINAL)
udev->group_final = 1;
strlcpy(udev->group, key_val(rule, &rule->group), sizeof(udev->group));
- apply_format(udev, key_val(rule, &rule->group), sizeof(udev->group), class_dev, sysfs_device);
- dbg("applied group='%s' to '%s'", udev->group, udev->kernel_name);
+ udev_rules_apply_format(udev, udev->group, sizeof(udev->group));
+ dbg("applied group='%s' to '%s'", udev->group, udev->dev->kernel);
}
/* collect symlinks */
if (!udev->symlink_final && rule->symlink.operation != KEY_OP_UNSET) {
char temp[PATH_SIZE];
char *pos, *next;
+ int count;
if (rule->symlink.operation == KEY_OP_ASSIGN_FINAL)
udev->symlink_final = 1;
if (rule->symlink.operation == KEY_OP_ASSIGN || rule->symlink.operation == KEY_OP_ASSIGN_FINAL) {
- struct name_entry *name_loop;
- struct name_entry *temp_loop;
-
info("reset symlink list");
- list_for_each_entry_safe(name_loop, temp_loop, &udev->symlink_list, node) {
- list_del(&name_loop->node);
- free(name_loop);
- }
+ name_list_cleanup(&udev->symlink_list);
}
strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp));
- apply_format(udev, temp, sizeof(temp), class_dev, sysfs_device);
- info("rule applied, added symlink '%s'", temp);
+ udev_rules_apply_format(udev, temp, sizeof(temp));
+ count = replace_untrusted_chars(temp);
+ if (count)
+ info("%i untrusted character(s) replaced" , count);
+ dbg("rule applied, added symlink(s) '%s'", temp);
/* add multiple symlinks separated by spaces */
pos = temp;
- next = strchr(temp, ' ');
+ while (isspace(pos[0]))
+ pos++;
+ next = strchr(pos, ' ');
while (next) {
next[0] = '\0';
info("add symlink '%s'", pos);
name_list_add(&udev->symlink_list, pos, 0);
+ while (isspace(next[1]))
+ next++;
pos = &next[1];
next = strchr(pos, ' ');
}
- info("add symlink '%s'", pos);
- name_list_add(&udev->symlink_list, pos, 0);
+ if (pos[0] != '\0') {
+ info("add symlink '%s'", pos);
+ name_list_add(&udev->symlink_list, pos, 0);
+ }
}
/* set name, later rules with name set will be ignored */
- if (rule->name.operation != KEY_OP_UNSET) {
+ if (rule->name.operation == KEY_OP_ASSIGN ||
+ rule->name.operation == KEY_OP_ASSIGN_FINAL ||
+ rule->name.operation == KEY_OP_ADD) {
+ int count;
+
name_set = 1;
strlcpy(udev->name, key_val(rule, &rule->name), sizeof(udev->name));
- apply_format(udev, udev->name, sizeof(udev->name), class_dev, sysfs_device);
+ udev_rules_apply_format(udev, udev->name, sizeof(udev->name));
+ count = replace_untrusted_chars(udev->name);
+ if (count)
+ info("%i untrusted character(s) replaced", count);
- info("rule applied, '%s' becomes '%s'", udev->kernel_name, udev->name);
- if (udev->type != DEV_NET)
+ info("rule applied, '%s' becomes '%s'", udev->dev->kernel, udev->name);
+ if (strcmp(udev->dev->subsystem, "net") != 0)
dbg("name, '%s' is going to have owner='%s', group='%s', mode=%#o partitions=%i",
udev->name, udev->owner, udev->group, udev->mode, udev->partitions);
}
if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
- char program[PATH_SIZE];
-
if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
udev->run_final = 1;
if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
- struct name_entry *name_loop;
- struct name_entry *temp_loop;
-
info("reset run list");
- list_for_each_entry_safe(name_loop, temp_loop, &udev->run_list, node) {
- list_del(&name_loop->node);
- free(name_loop);
- }
+ name_list_cleanup(&udev->run_list);
}
- strlcpy(program, key_val(rule, &rule->run), sizeof(program));
- apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
- dbg("add run '%s'", program);
- name_list_add(&udev->run_list, program, 0);
+ dbg("add run '%s'", key_val(rule, &rule->run));
+ name_list_add(&udev->run_list, key_val(rule, &rule->run), 0);
}
if (rule->last_rule) {
dbg("last rule to be applied");
break;
}
+
+ if (rule->goto_label.operation != KEY_OP_UNSET) {
+ dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label));
+ udev_rules_iter_label(rules, key_val(rule, &rule->goto_label));
+ }
}
}
if (!name_set) {
- strlcpy(udev->name, udev->kernel_name, sizeof(udev->name));
- info("no rule found, will use kernel name '%s'", udev->name);
+ strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name));
+ info("no node name set, will use kernel name '%s'", udev->name);
}
if (udev->tmp_node[0] != '\0') {
return 0;
}
-int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev, struct sysfs_device *sysfs_device)
+int udev_rules_get_run(struct udev_rules *rules, struct udevice *udev)
{
struct udev_rule *rule;
+ dbg("udev->kernel='%s'", udev->dev->kernel);
+
/* look for a matching rule to apply */
udev_rules_iter_init(rules);
while (1) {
continue;
}
- if (match_rule(udev, rule, NULL, sysfs_device) == 0) {
+ if (match_rule(udev, rule) == 0) {
if (rule->ignore_device) {
- info("rule applied, '%s' is ignored", udev->kernel_name);
+ info("rule applied, '%s' is ignored", udev->dev->kernel);
udev->ignore_device = 1;
return 0;
}
if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
- char program[PATH_SIZE];
-
if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
- struct name_entry *name_loop;
- struct name_entry *temp_loop;
-
info("reset run list");
- list_for_each_entry_safe(name_loop, temp_loop, &udev->run_list, node) {
- list_del(&name_loop->node);
- free(name_loop);
- }
+ name_list_cleanup(&udev->run_list);
}
- strlcpy(program, key_val(rule, &rule->run), sizeof(program));
- apply_format(udev, program, sizeof(program), NULL, sysfs_device);
- dbg("add run '%s'", program);
- name_list_add(&udev->run_list, program, 0);
+ dbg("add run '%s'", key_val(rule, &rule->run));
+ name_list_add(&udev->run_list, key_val(rule, &rule->run), 0);
if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
break;
}
dbg("last rule to be applied");
break;
}
+
+ if (rule->goto_label.operation != KEY_OP_UNSET) {
+ dbg("moving forward to label '%s'", key_val(rule, &rule->goto_label));
+ udev_rules_iter_label(rules, key_val(rule, &rule->goto_label));
+ }
}
}
~ianmdlvl / elogind.git / blobdiff