/*
* udev_rules.c
*
- * Userspace devfs
- *
* Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
* Copyright (C) 2003-2005 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.
#include <unistd.h>
#include <errno.h>
#include <sys/wait.h>
+#include <sys/stat.h>
#include "libsysfs/sysfs/libsysfs.h"
#include "list.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) {
return import_keys_into_env(udev, result, reslen);
}
+static int import_parent_into_env(struct udevice *udev, struct sysfs_class_device *class_dev, const char *filter)
+{
+ struct sysfs_class_device *parent = sysfs_get_classdev_parent(class_dev);
+ int rc = -1;
+
+ if (parent != NULL) {
+ struct udevice udev_parent;
+ struct name_entry *name_loop;
+
+ dbg("found parent '%s', get the node name", parent->path);
+ udev_init_device(&udev_parent, NULL, NULL, NULL);
+ /* import the udev_db of the parent */
+ if (udev_db_get_device(&udev_parent, &parent->path[strlen(sysfs_path)]) == 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 (strcmp_pattern(filter, name) == 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_cleanup_device(&udev_parent);
+ }
+
+ return rc;
+}
+
/* 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_sysfs_attribute(struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device,
const char *name, char *value, size_t len)
{
+ struct sysfs_class_device *class_dev_parent;
struct sysfs_attribute *tmpattr;
dbg("look for device attribute '%s'", name);
tmpattr = sysfs_get_classdev_attr(class_dev, name);
if (tmpattr)
goto attr_found;
+ class_dev_parent = sysfs_get_classdev_parent(class_dev);
+ if (class_dev_parent) {
+ tmpattr = sysfs_get_classdev_attr(class_dev_parent, name);
+ if (tmpattr)
+ goto attr_found;
+ }
}
if (sysfs_device) {
dbg("look for devices attribute '%s/%s'", sysfs_device->path, name);
return 0;
}
+#define WAIT_LOOP_PER_SECOND 20
+static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout)
+{
+ char filename[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);
+
+ while (--loop) {
+ if (stat(filename, &stats) == 0) {
+ dbg("file appeared after %i loops", (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
+ return 0;
+ }
+ usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND);
+ }
+ dbg("waiting for '%s' failed", filename);
+ 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)
{
break;
}
pos = getenv(attr);
- if (pos == NULL)
+ if (pos == NULL) {
+ dbg("env '%s' not avialable", 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);
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;
if (key->operation == KEY_OP_UNSET)
return 0;
- key_value = rule->buf + key->val_off;
+ strlcpy(value, rule->buf + key->val_off, sizeof(value));
+ key_value = value;
- 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 key is matching (matching value)", key_name);
- return 0;
- }
- if (!match && (key->operation == KEY_OP_NOMATCH)) {
- dbg("%s key is matching, (non matching value)", key_name);
- return 0;
+ 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 = (strcmp_pattern(key_value, val) == 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;
+ }
+ key_value = pos;
}
-
- dbg("%s key is not matching", key_name);
+ dbg("%s is false", key_name);
return -1;
}
const char *value = getenv(key_name);
if (!value) {
- dbg("ENV{'%s'} is not found", key_name);
- goto exit;
+ dbg("ENV{'%s'} is not set", key_name);
+ value = "";
}
if (match_key("ENV", rule, &pair->key, value))
goto exit;
dbg("all %i ENV keys matched", rule->env.count);
}
+ if (rule->wait_for_sysfs.operation != KEY_OP_UNSET) {
+ int match;
+
+ 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 true (matching value)");
+ return 0;
+ }
+ if (!match && (rule->wait_for_sysfs.operation == KEY_OP_NOMATCH)) {
+ dbg("WAIT_FOR_SYSFS is true, (non matching value)");
+ return 0;
+ }
+ dbg("WAIT_FOR_SYSFS is false");
+ return -1;
+ }
+
/* walk up the chain of physical devices and find a match */
while (1) {
/* check for matching driver */
strlcpy(import, key_val(rule, &rule->import), sizeof(import));
apply_format(udev, import, sizeof(import), class_dev, sysfs_device);
dbg("check for IMPORT import='%s'", import);
- if (rule->import_exec) {
+ if (rule->import_type == IMPORT_PROGRAM) {
dbg("run executable file import='%s'", import);
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 && class_dev) {
+ dbg("import parent import='%s'", import);
+ rc = import_parent_into_env(udev, class_dev, import);
}
if (rc) {
dbg("IMPORT failed");
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");
+ dbg("PROGRAM is false");
if (rule->program.operation != KEY_OP_NOMATCH)
goto exit;
} else {
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);
if (rule == NULL)
break;
- if (udev->name_set && rule->name.operation != KEY_OP_UNSET) {
+ if (name_set && rule->name.operation != KEY_OP_UNSET) {
dbg("node name already set, rule ignored");
continue;
}
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);
+ apply_format(udev, udev->group, sizeof(udev->group), class_dev, sysfs_device);
dbg("applied group='%s' to '%s'", udev->group, udev->kernel_name);
}
/* 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) {
- udev->name_set = 1;
+ 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);
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 (udev->name[0] == '\0') {
+ if (!name_set) {
strlcpy(udev->name, udev->kernel_name, sizeof(udev->name));
info("no rule found, will use kernel name '%s'", udev->name);
}
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 sysfs_class_device *class_dev, struct sysfs_device *sysfs_dev)
{
struct udev_rule *rule;
+ if (class_dev && !sysfs_dev)
+ sysfs_dev = sysfs_get_classdev_device(class_dev);
+ if (sysfs_dev) {
+ dbg("found devices device: path='%s', bus_id='%s', bus='%s'",
+ sysfs_dev->path, sysfs_dev->bus_id, sysfs_dev->bus);
+ strlcpy(udev->bus_id, sysfs_dev->bus_id, sizeof(udev->bus_id));
+ }
+
+ dbg("udev->kernel_name='%s'", udev->kernel_name);
+
/* 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, class_dev, sysfs_dev) == 0) {
if (rule->ignore_device) {
info("rule applied, '%s' is ignored", udev->kernel_name);
udev->ignore_device = 1;
}
}
strlcpy(program, key_val(rule, &rule->run), sizeof(program));
- apply_format(udev, program, sizeof(program), NULL, sysfs_device);
+ apply_format(udev, program, sizeof(program), class_dev, sysfs_dev);
dbg("add run '%s'", program);
name_list_add(&udev->run_list, program, 0);
if (rule->run.operation == KEY_OP_ASSIGN_FINAL)
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