/*
- * udev_rules.c
- *
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (C) 2003-2006 Kay Sievers <kay.sievers@vrfy.org>
*
*
* 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.
*
*/
char *temp;
linepos = *line;
- if (!linepos)
- return -1;
-
- if (strchr(linepos, '\\')) {
- dbg("escaped characters are not supported, skip");
+ if (linepos == NULL)
return -1;
- }
/* skip whitespace */
while (isspace(linepos[0]))
linepos++;
/* get the key */
+ temp = strchr(linepos, '=');
+ if (temp == NULL || temp == linepos)
+ return -1;
+ temp[0] = '\0';
*key = linepos;
- while (1) {
- linepos++;
- if (linepos[0] == '\0')
- return -1;
- if (isspace(linepos[0]))
- break;
- if (linepos[0] == '=')
- break;
+ linepos = &temp[1];
+
+ /* get a quoted value */
+ if (linepos[0] == '"' || linepos[0] == '\'') {
+ temp = strchr(&linepos[1], linepos[0]);
+ if (temp != NULL) {
+ temp[0] = '\0';
+ *value = &linepos[1];
+ goto out;
+ }
}
- /* terminate key */
- linepos[0] = '\0';
- linepos++;
-
- /* skip whitespace */
- while (isspace(linepos[0]))
- linepos++;
-
/* get the value*/
- if (linepos[0] == '"') {
- linepos++;
- temp = strchr(linepos, '"');
- if (!temp) {
- dbg("missing closing quote");
- return -1;
- }
- dbg("value is quoted");
+ temp = strchr(linepos, '\n');
+ if (temp != NULL)
temp[0] = '\0';
- } else if (linepos[0] == '\'') {
- linepos++;
- temp = strchr(linepos, '\'');
- if (!temp) {
- dbg("missing closing quote");
- return -1;
- }
- dbg("value is quoted");
- temp[0] = '\0';
- } else if (linepos[0] == '\0') {
- dbg("value is empty");
- } else {
- temp = linepos;
- while (temp[0] && !isspace(temp[0]))
- temp++;
- temp[0] = '\0';
- }
*value = linepos;
-
+out:
return 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);
}
}
static int import_program_into_env(struct udevice *udev, const char *program)
{
- char result[1024];
+ char result[2048];
size_t reslen;
- if (run_program(program, udev->dev->subsystem, result, sizeof(result), &reslen, (udev_log_priority >= LOG_INFO)) != 0)
+ if (run_program(program, udev->dev->subsystem, result, sizeof(result), &reslen) != 0)
return -1;
return import_keys_into_env(udev, result, reslen);
}
struct name_entry *name_loop;
dbg("found parent '%s', get the node name", dev_parent->devpath);
- udev_parent = udev_device_init();
+ udev_parent = udev_device_init(NULL);
if (udev_parent == NULL)
return -1;
/* import the udev_db of the parent */
return rc;
}
+int udev_rules_run(struct udevice *udev)
+{
+ struct name_entry *name_loop;
+ int retval = 0;
+
+ dbg("executing run list");
+ list_for_each_entry(name_loop, &udev->run_list, node) {
+ if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0) {
+ pass_env_to_socket(&name_loop->name[strlen("socket:")], udev->dev->devpath, udev->action);
+ } else {
+ char program[PATH_SIZE];
+
+ strlcpy(program, name_loop->name, sizeof(program));
+ udev_rules_apply_format(udev, program, sizeof(program));
+ if (run_program(program, udev->dev->subsystem, NULL, 0, NULL) != 0)
+ if (!name_loop->ignore_error)
+ retval = -1;
+ }
+ }
+
+ return retval;
+}
+
#define WAIT_LOOP_PER_SECOND 50
static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout)
{
info("file '%s' appeared after %i loops", filepath, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
return 0;
}
- /* make sure the device does not have disappeared in the meantime */
+ /* 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);
}
- err("waiting for '%s' failed", filepath);
+ info("waiting for '%s' failed", filepath);
return -1;
}
+/* handle "[$SUBSYSTEM/$KERNEL]<attribute>" lookup */
+static int attr_get_by_subsys_id(const char *attrstr, char *devpath, size_t len, char **attr)
+{
+ char subsys[NAME_SIZE];
+ char *attrib;
+ char *id;
+ int found = 0;
+
+ if (attrstr[0] != '[')
+ goto out;
+
+ strlcpy(subsys, &attrstr[1], sizeof(subsys));
+
+ attrib = strchr(subsys, ']');
+ if (attrib == NULL)
+ goto out;
+ attrib[0] = '\0';
+ attrib = &attrib[1];
+
+ id = strchr(subsys, '/');
+ if (id == NULL)
+ goto out;
+ id[0] = '\0';
+ id = &id[1];
+
+ if (sysfs_lookup_devpath_by_subsys_id(devpath, len, subsys, id)) {
+ if (attr != NULL) {
+ if (attrib[0] != '\0')
+ *attr = attrib;
+ else
+ *attr = NULL;
+ }
+ found = 1;
+ }
+out:
+ return found;
+}
+
void udev_rules_apply_format(struct udevice *udev, char *string, size_t maxsize)
{
char temp[PATH_SIZE];
SUBST_PARENT,
SUBST_TEMP_NODE,
SUBST_ROOT,
+ SUBST_SYS,
SUBST_ENV,
};
static const struct subst_map {
{ .name = "parent", .fmt = 'P', .type = SUBST_PARENT },
{ .name = "tempnode", .fmt = 'N', .type = SUBST_TEMP_NODE },
{ .name = "root", .fmt = 'r', .type = SUBST_ROOT },
+ { .name = "sys", .fmt = 'S', .type = SUBST_SYS },
{ .name = "env", .fmt = 'E', .type = SUBST_ENV },
{ NULL, '\0', 0 }
};
goto found;
}
}
+ head[0] = '$';
+ err("unknown format variable '%s'", head);
} else if (head[0] == '%') {
/* substitute format char */
if (head[1] == '\0')
goto found;
}
}
+ head[0] = '%';
+ err("unknown format char '%c'", tail[0]);
}
head++;
}
}
break;
case SUBST_ATTR:
- if (attr == NULL) {
- dbg("missing attribute");
- break;
- } else {
- struct sysfs_device *dev_parent;
- const char *value;
-
- 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));
+ if (attr == NULL)
+ err("missing file parameter for attr");
+ else {
+ char devpath[PATH_SIZE];
+ char *attrib;
+ const char *value = NULL;
+ size_t size;
+
+ if (attr_get_by_subsys_id(attr, devpath, sizeof(devpath), &attrib)) {
+ if (attrib != NULL)
+ value = sysfs_attr_get_value(devpath, attrib);
+ else
break;
- }
- dev_parent = sysfs_device_get_parent(dev_parent);
- } while (dev_parent != NULL);
-
- /* strip trailing whitespace of sysfs value */
- i = strlen(temp2);
- while (i > 0 && isspace(temp2[i-1]))
- temp2[--i] = '\0';
- count = replace_untrusted_chars(temp2);
- if (count)
- info("%i untrusted character(s) replaced" , count);
+ }
+
+ /* try the current device, other matches may have selected */
+ if (value == NULL && 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 (value == NULL)
+ break;
+
+ /* strip trailing whitespace, and replace unwanted characters */
+ 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_chars(temp2, ALLOWED_CHARS_INPUT);
+ if (count > 0)
+ info("%i character(s) replaced" , count);
strlcat(string, temp2, maxsize);
dbg("substitute sysfs value '%s'", temp2);
}
struct udevice *udev_parent;
dbg("found parent '%s', get the node name", dev_parent->devpath);
- udev_parent = udev_device_init();
+ 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) {
}
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));
strlcat(string, udev_root, maxsize);
dbg("substitute udev_root '%s'", udev_root);
break;
+ case SUBST_SYS:
+ strlcat(string, sysfs_path, maxsize);
+ dbg("substitute sysfs_path '%s'", sysfs_path);
+ break;
case SUBST_ENV:
if (attr == NULL) {
dbg("missing attribute");
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_MATCH &&
key->operation != KEY_OP_NOMATCH)
return 0;
+ /* 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, '|');
pos[0] = '\0';
pos++;
}
+
dbg("match %s '%s' <-> '%s'", key_name, key_value, val);
match = (fnmatch(key_value, val, 0) == 0);
- if (match && (key->operation != KEY_OP_NOMATCH)) {
- dbg("%s is true (matching value)", key_name);
- return 0;
- }
- if (!match && (key->operation == KEY_OP_NOMATCH)) {
- dbg("%s is true (non-matching value)", key_name);
- return 0;
- }
+ if (match)
+ break;
+
key_value = pos;
}
- dbg("%s is false", key_name);
+
+ 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 true (non-matching value)", key_name);
+ return 0;
+ }
return -1;
}
}
}
+ if (rule->test.operation != KEY_OP_UNSET) {
+ char filename[PATH_SIZE];
+ char devpath[PATH_SIZE];
+ char *attr;
+ struct stat statbuf;
+ int match;
+
+ strlcpy(filename, key_val(rule, &rule->test), sizeof(filename));
+ udev_rules_apply_format(udev, filename, sizeof(filename));
+
+ if (attr_get_by_subsys_id(filename, devpath, sizeof(devpath), &attr)) {
+ strlcpy(filename, sysfs_path, sizeof(filename));
+ strlcat(filename, devpath, sizeof(filename));
+ if (attr != NULL) {
+ strlcat(filename, "/", sizeof(filename));
+ strlcat(filename, attr, sizeof(filename));
+ }
+ }
+
+ match = (stat(filename, &statbuf) == 0);
+ info("'%s' %s", filename, match ? "exists" : "does not exist");
+ if (match && rule->test_mode_mask > 0) {
+ match = ((statbuf.st_mode & rule->test_mode_mask) > 0);
+ info("'%s' has mode=%#o and %s %#o", filename, statbuf.st_mode,
+ match ? "matches" : "does not match",
+ rule->test_mode_mask);
+ }
+ if (match && rule->test.operation == KEY_OP_NOMATCH)
+ goto nomatch;
+ if (!match && rule->test.operation == KEY_OP_MATCH)
+ goto nomatch;
+ dbg("TEST key is true");
+ }
+
if (rule->wait_for_sysfs.operation != KEY_OP_UNSET) {
int found;
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 devpath[PATH_SIZE];
+ char *attrib;
+ const char *value = NULL;
char val[VALUE_SIZE];
size_t len;
- value = sysfs_attr_get_value(udev->dev->devpath, key_name);
+ if (attr_get_by_subsys_id(key_name, devpath, sizeof(devpath), &attrib)) {
+ if (attrib != NULL)
+ value = sysfs_attr_get_value(devpath, attrib);
+ else
+ goto nomatch;
+ }
+ if (value == NULL)
+ value = sysfs_attr_get_value(udev->dev->devpath, key_name);
if (value == NULL)
goto nomatch;
strlcpy(val, value, sizeof(val));
if (match_key("DRIVERS", rule, &rule->drivers, udev->dev_parent->driver))
goto try_parent;
- /* check for matching sysfs attrubute pairs */
+ /* check for matching sysfs attribute pairs */
for (i = 0; i < rule->attrs.count; i++) {
struct key_pair *pair = &rule->attrs.keys[i];
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) {
+ if (run_program(program, udev->dev->subsystem, result, sizeof(result), NULL) != 0) {
dbg("PROGRAM is false");
udev->program_result[0] = '\0';
if (rule->program.operation != KEY_OP_NOMATCH)
dbg("PROGRAM matches");
remove_trailing_chars(result, '\n');
- count = replace_untrusted_chars(result);
- if (count)
- info("%i untrusted character(s) replaced" , count);
+ if (rule->string_escape == ESCAPE_UNSET ||
+ rule->string_escape == ESCAPE_REPLACE) {
+ count = replace_chars(result, ALLOWED_CHARS_INPUT);
+ if (count > 0)
+ info("%i character(s) replaced" , count);
+ }
dbg("result is '%s'", result);
strlcpy(udev->program_result, result, sizeof(udev->program_result));
dbg("PROGRAM returned successful");
struct key_pair *pair = &rule->env.keys[i];
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);
- char *key_value = name_list_key_add(&udev->env_list, key_name, value);
- if (key_value == NULL)
- break;
- udev_rules_apply_format(udev, key_value, NAME_SIZE);
- putenv(key_value);
- dbg("export ENV '%s'", key_value);
+ /* 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 {
+ struct name_entry *entry;
+
+ entry = name_list_key_add(&udev->env_list, key_name, temp_value);
+ if (entry == NULL)
+ break;
+ putenv(entry->name);
+ info("set ENV '%s'", entry->name);
+ }
}
}
- /* if we have ATTR assignements write value to sysfs file */
+ /* if we have ATTR assignments, write value to sysfs file */
for (i = 0; i < rule->attr.count; i++) {
struct key_pair *pair = &rule->attr.keys[i];
if (pair->key.operation == KEY_OP_ASSIGN) {
const char *key_name = key_pair_name(rule, pair);
- const char *key_value = key_val(rule, &pair->key);
- char attr[PATH_SIZE];
+ char devpath[PATH_SIZE];
+ char *attrib;
+ 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));
- dbg("write '%s' to '%s'", key_value, attr);
+ if (attr_get_by_subsys_id(key_name, devpath, sizeof(devpath), &attrib)) {
+ if (attrib != NULL) {
+ strlcpy(attr, sysfs_path, sizeof(attr));
+ strlcat(attr, devpath, sizeof(attr));
+ strlcat(attr, "/", sizeof(attr));
+ strlcat(attr, attrib, sizeof(attr));
+ }
+ }
+
+ if (attr[0] == '\0') {
+ 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 (fprintf(f, "%s\n", key_value) <= 0)
- err("error writing ATTR{%s}: %s", attr, strerror(errno));
+ 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));
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 &&
strcmp(udev->dev->subsystem, "block") == 0 && udev->dev->kernel_number[0] == '\0') {
info("reset symlink list");
name_list_cleanup(&udev->symlink_list);
}
+ /* allow multiple symlinks separated by spaces */
strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp));
udev_rules_apply_format(udev, temp, sizeof(temp));
- count = replace_untrusted_chars(temp);
- if (count)
- info("%i untrusted character(s) replaced" , count);
+ if (rule->string_escape == ESCAPE_UNSET ||
+ rule->string_escape == ESCAPE_REPLACE) {
+ count = replace_chars(temp, ALLOWED_CHARS_FILE " ");
+ if (count > 0)
+ info("%i character(s) replaced" , count);
+ }
dbg("rule applied, added symlink(s) '%s'", temp);
-
- /* add multiple symlinks separated by spaces */
pos = temp;
while (isspace(pos[0]))
pos++;
name_set = 1;
strlcpy(udev->name, key_val(rule, &rule->name), sizeof(udev->name));
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);
+ if (rule->string_escape == ESCAPE_UNSET ||
+ rule->string_escape == ESCAPE_REPLACE) {
+ count = replace_chars(udev->name, ALLOWED_CHARS_FILE);
+ if (count > 0)
+ info("%i character(s) replaced", count);
+ }
info("rule applied, '%s' becomes '%s'", udev->dev->kernel, udev->name);
if (strcmp(udev->dev->subsystem, "net") != 0)
}
if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
+ struct name_entry *entry;
+
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) {
name_list_cleanup(&udev->run_list);
}
dbg("add run '%s'", key_val(rule, &rule->run));
- name_list_add(&udev->run_list, key_val(rule, &rule->run), 0);
+ entry = name_list_add(&udev->run_list, key_val(rule, &rule->run), 0);
+ if (rule->run_ignore_error)
+ entry->ignore_error = 1;
}
if (rule->last_rule) {
dbg("process rule");
if (rule->name.operation != KEY_OP_UNSET || rule->symlink.operation != KEY_OP_UNSET ||
- rule->mode_operation != KEY_OP_UNSET || rule->owner.operation != KEY_OP_UNSET || rule->group.operation != KEY_OP_UNSET) {
+ rule->mode_operation != KEY_OP_UNSET || rule->owner.operation != KEY_OP_UNSET ||
+ rule->group.operation != KEY_OP_UNSET) {
dbg("skip rule that names a device");
continue;
}
}
if (!udev->run_final && rule->run.operation != KEY_OP_UNSET) {
- if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) {
+ struct name_entry *entry;
+
+ if (rule->run.operation == KEY_OP_ASSIGN ||
+ rule->run.operation == KEY_OP_ASSIGN_FINAL) {
info("reset run list");
name_list_cleanup(&udev->run_list);
}
dbg("add run '%s'", key_val(rule, &rule->run));
- name_list_add(&udev->run_list, key_val(rule, &rule->run), 0);
+ entry = name_list_add(&udev->run_list, key_val(rule, &rule->run), 0);
+ if (rule->run_ignore_error)
+ entry->ignore_error = 1;
if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
break;
}
~ianmdlvl / elogind.git / blobdiff