/*
* 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 <ctype.h>
#include <unistd.h>
#include <errno.h>
+#include <syslog.h>
#include <sys/wait.h>
#include <sys/stat.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) {
char result[1024];
size_t reslen;
- if (execute_program(program, udev->subsystem, result, sizeof(result), &reslen) != 0)
+ if (run_program(program, udev->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 find_free_number(const char *name)
{
char devpath[PATH_SIZE];
char filename[PATH_SIZE];
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);
{ .name = "root", .fmt = 'r', .type = SUBST_ROOT },
{ .name = "modalias", .fmt = 'A', .type = SUBST_MODALIAS },
{ .name = "env", .fmt = 'E', .type = SUBST_ENV },
- {}
+ { NULL, '\0', 0 }
};
enum subst_type type;
const struct subst_map *subst;
dbg("substitute sysfs value '%s'", temp2);
break;
case SUBST_ENUM:
- next_free_number = find_free_number(udev, string);
+ next_free_number = find_free_number(string);
if (next_free_number > 0) {
sprintf(temp2, "%d", next_free_number);
strlcat(string, temp2, maxsize);
struct sysfs_class_device *class_dev, struct sysfs_device *sysfs_device)
{
struct sysfs_device *parent_device = sysfs_device;
+ int i;
if (match_key("ACTION", rule, &rule->action, udev->action))
goto exit;
goto exit;
}
- 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_ASSIGN) {
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;
}
- dbg("all %i ENV keys matched", rule->env.count);
}
if (rule->wait_for_sysfs.operation != KEY_OP_UNSET) {
/* check for matching sysfs pairs */
if (rule->sysfs.count) {
- int 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];
dbg("look at sysfs_device->bus_id='%s'", parent_device->bus_id);
}
- /* 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));
+ apply_format(udev, program, sizeof(program), class_dev, sysfs_device);
+ if (run_program(program, udev->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 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;
+ }
+ dbg("PROGRAM key is true");
+ }
+
+ /* check for matching result of external program */
+ if (match_key("RESULT", rule, &rule->result, udev->program_result))
+ goto exit;
+
+ /* import variables returned from program or or file into environment */
if (rule->import.operation != KEY_OP_UNSET) {
char import[PATH_SIZE];
int rc = -1;
apply_format(udev, import, sizeof(import), class_dev, sysfs_device);
dbg("check for IMPORT import='%s'", import);
if (rule->import_type == IMPORT_PROGRAM) {
- dbg("run executable file import='%s'", import);
rc = import_program_into_env(udev, import);
} else if (rule->import_type == IMPORT_FILE) {
dbg("import file import='%s'", 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 false");
- 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) {
+ const char *key_name = key_pair_name(rule, pair);
+ const char *value = key_val(rule, &pair->key);
+
+ setenv(key_name, value, 1);
+ dbg("export ENV '%s=%s'", key_name, 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;
-
- /* rule matches */
return 0;
exit:
}
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);
+ dbg("rule applied, added symlink '%s'", temp);
/* add multiple symlinks separated by spaces */
pos = temp;
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);
+ 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 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