/*
- * udev_rules_parse.c
- *
- * Userspace devfs
- *
* Copyright (C) 2003,2004 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
*
* 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 <sys/stat.h>
#include <errno.h>
-#include "udev_libc_wrapper.h"
#include "udev.h"
-#include "udev_utils.h"
-#include "logging.h"
#include "udev_rules.h"
return NULL;
dbg("current=%zi", rules->current);
- if (rules->current >= rules->bufsize)
+ if (rules->current >= rules->bufsize) {
+ dbg("no more rules");
return NULL;
+ }
/* get next rule */
rule = (struct udev_rule *) (rules->buf + rules->current);
return rule;
}
+struct udev_rule *udev_rules_iter_label(struct udev_rules *rules, const char *label)
+{
+ static struct udev_rule *rule;
+
+next:
+ dbg("current=%zi", rules->current);
+ if (rules->current >= rules->bufsize) {
+ dbg("no more rules");
+ return NULL;
+ }
+ rule = (struct udev_rule *) (rules->buf + rules->current);
+
+ if (strcmp(&rule->buf[rule->label.val_off], label) != 0) {
+ dbg("moving forward, looking for label '%s'", label);
+ rules->current += sizeof(struct udev_rule) + rule->bufsize;
+ goto next;
+ }
+
+ dbg("found label '%s'", label);
+ return rule;
+}
+
static int get_key(char **line, char **key, enum key_operation *operation, char **value)
{
char *linepos;
char *temp;
linepos = *line;
- if (!linepos)
+ if (linepos == NULL && linepos[0] == '\0')
return -1;
/* skip whitespace */
linepos++;
/* get the key */
+ if (linepos[0] == '\0')
+ return -1;
*key = linepos;
+
while (1) {
linepos++;
if (linepos[0] == '\0')
break;
if (linepos[0] == '=')
break;
- if (linepos[0] == '+')
- break;
- if (linepos[0] == '!')
- break;
- if (linepos[0] == ':')
- break;
+ if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
+ if (linepos[1] == '=')
+ break;
}
/* remember end of key */
/* skip whitespace after key */
while (isspace(linepos[0]))
linepos++;
+ if (linepos[0] == '\0')
+ return -1;
/* get operation type */
if (linepos[0] == '=' && linepos[1] == '=') {
/* skip whitespace after operator */
while (isspace(linepos[0]))
linepos++;
+ if (linepos[0] == '\0')
+ return -1;
/* get the value*/
if (linepos[0] == '"')
size_t key_len = strnlen(key, PATH_SIZE);
if (pairs->count >= PAIRS_MAX) {
- err("skip, too many keys in a single rule");
+ err("skip, too many keys of the same type in a single rule");
return -1;
}
return 0;
}
-static int add_to_rules(struct udev_rules *rules, char *line)
+static int add_to_rules(struct udev_rules *rules, char *line, const char *filename, unsigned int lineno)
{
struct udev_rule *rule;
size_t rule_size;
int valid;
char *linepos;
char *attr;
+ size_t padding;
+ int physdev = 0;
int retval;
/* get all the keys */
if (retval)
break;
+ if (strcasecmp(key, "ACTION") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err("invalid ACTION operation");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->action, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "DEVPATH") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err("invalid DEVPATH operation");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->devpath, operation, value);
+ valid = 1;
+ continue;
+ }
+
if (strcasecmp(key, "KERNEL") == 0) {
- add_rule_key(rule, &rule->kernel_name, operation, value);
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err("invalid KERNEL operation");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->kernel, operation, value);
valid = 1;
continue;
}
if (strcasecmp(key, "SUBSYSTEM") == 0) {
- add_rule_key(rule, &rule->subsystem, operation, value);
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err("invalid SUBSYSTEM operation");
+ goto invalid;
+ }
+ /* bus, class, subsystem events should all be the same */
+ if (strcmp(value, "subsystem") == 0 ||
+ strcmp(value, "bus") == 0 ||
+ strcmp(value, "class") == 0) {
+ if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
+ err("'%s' must be specified as 'subsystem' "
+ "please fix it in %s:%u", value, filename, lineno);
+ add_rule_key(rule, &rule->subsystem, operation, "subsystem|class|bus");
+ } else
+ add_rule_key(rule, &rule->subsystem, operation, value);
valid = 1;
continue;
}
- if (strcasecmp(key, "ACTION") == 0) {
- add_rule_key(rule, &rule->action, operation, value);
+ if (strcasecmp(key, "DRIVER") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err("invalid DRIVER operation");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->driver, operation, value);
valid = 1;
continue;
}
- if (strcasecmp(key, "DEVPATH") == 0) {
- add_rule_key(rule, &rule->devpath, operation, value);
+ if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
+ attr = get_key_attribute(key + sizeof("ATTR")-1);
+ if (attr == NULL) {
+ err("error parsing ATTR attribute");
+ goto invalid;
+ }
+ if (add_rule_key_pair(rule, &rule->attr, operation, attr, value) != 0)
+ goto invalid;
valid = 1;
continue;
}
- if (strcasecmp(key, "BUS") == 0) {
- add_rule_key(rule, &rule->bus, operation, value);
+ if (strcasecmp(key, "KERNELS") == 0 ||
+ strcasecmp(key, "ID") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err("invalid KERNELS operation");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->kernels, operation, value);
valid = 1;
continue;
}
- if (strcasecmp(key, "ID") == 0) {
- add_rule_key(rule, &rule->id, operation, value);
+ if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
+ strcasecmp(key, "BUS") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err("invalid SUBSYSTEMS operation");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->subsystems, operation, value);
valid = 1;
continue;
}
- if (strncasecmp(key, "SYSFS", sizeof("SYSFS")-1) == 0) {
- attr = get_key_attribute(key + sizeof("SYSFS")-1);
- if (attr == NULL) {
- err("error parsing SYSFS attribute in '%s'", line);
- continue;
+ if (strcasecmp(key, "DRIVERS") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err("invalid DRIVERS operation");
+ goto invalid;
}
- add_rule_key_pair(rule, &rule->sysfs, operation, attr, value);
+ add_rule_key(rule, &rule->drivers, operation, value);
valid = 1;
continue;
}
- if (strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
- add_rule_key(rule, &rule->wait_for_sysfs, operation, value);
+ if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
+ strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err("invalid ATTRS operation");
+ goto invalid;
+ }
+ attr = get_key_attribute(key + sizeof("ATTRS")-1);
+ if (attr == NULL) {
+ err("error parsing ATTRS attribute");
+ goto invalid;
+ }
+ if (strncmp(attr, "device/", 7) == 0)
+ err("the 'device' link is deprecated and will be removed from a future kernel, "
+ "please fix it in %s:%u", filename, lineno);
+ else if (strstr(attr, "../") != NULL)
+ err("do not reference parent sysfs directories directly, that may break with a future kernel, "
+ "please fix it in %s:%u", filename, lineno);
+ if (add_rule_key_pair(rule, &rule->attrs, operation, attr, value) != 0)
+ goto invalid;
valid = 1;
continue;
}
- if (strncasecmp(key, "ENV", sizeof("ENV")-1) == 0) {
+ if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
attr = get_key_attribute(key + sizeof("ENV")-1);
if (attr == NULL) {
err("error parsing ENV attribute");
- continue;
+ goto invalid;
}
- add_rule_key_pair(rule, &rule->env, operation, attr, value);
+ if (strncmp(attr, "PHYSDEV", 7) == 0)
+ physdev = 1;
+ if (add_rule_key_pair(rule, &rule->env, operation, attr, value) != 0)
+ goto invalid;
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "PROGRAM") == 0) {
+ add_rule_key(rule, &rule->program, operation, value);
valid = 1;
continue;
}
- if (strcasecmp(key, "MODALIAS") == 0) {
- add_rule_key(rule, &rule->modalias, operation, value);
+ if (strcasecmp(key, "RESULT") == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err("invalid RESULT operation");
+ goto invalid;
+ }
+ add_rule_key(rule, &rule->result, operation, value);
valid = 1;
continue;
}
attr = get_key_attribute(key + sizeof("IMPORT")-1);
if (attr && strstr(attr, "program")) {
dbg("IMPORT will be executed");
- rule->import_exec = 1;
+ rule->import_type = IMPORT_PROGRAM;
} else if (attr && strstr(attr, "file")) {
dbg("IMPORT will be included as file");
+ rule->import_type = IMPORT_FILE;
+ } else if (attr && strstr(attr, "parent")) {
+ dbg("IMPORT will include the parent values");
+ rule->import_type = IMPORT_PARENT;
} else {
/* figure it out if it is executable */
char file[PATH_SIZE];
pos = strchr(file, ' ');
if (pos)
pos[0] = '\0';
+
+ /* allow programs in /lib/udev called without the path */
+ if (strchr(file, '/') == NULL) {
+ strlcpy(file, "/lib/udev/", sizeof(file));
+ strlcat(file, value, sizeof(file));
+ pos = strchr(file, ' ');
+ if (pos)
+ pos[0] = '\0';
+ }
+
dbg("IMPORT auto mode for '%s'", file);
if (!lstat(file, &stats) && (stats.st_mode & S_IXUSR)) {
- dbg("IMPORT is executable, will be executed");
- rule->import_exec = 1;
+ dbg("IMPORT is executable, will be executed (autotype)");
+ rule->import_type = IMPORT_PROGRAM;
+ } else {
+ dbg("IMPORT is not executable, will be included as file (autotype)");
+ rule->import_type = IMPORT_FILE;
}
}
add_rule_key(rule, &rule->import, operation, value);
continue;
}
- if (strcasecmp(key, "DRIVER") == 0) {
- add_rule_key(rule, &rule->driver, operation, value);
+ if (strcasecmp(key, "RUN") == 0) {
+ add_rule_key(rule, &rule->run, operation, value);
valid = 1;
continue;
}
- if (strcasecmp(key, "RESULT") == 0) {
- add_rule_key(rule, &rule->result, operation, value);
+ if (strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
+ add_rule_key(rule, &rule->wait_for_sysfs, operation, value);
valid = 1;
continue;
}
- if (strcasecmp(key, "PROGRAM") == 0) {
- add_rule_key(rule, &rule->program, operation, value);
+ if (strcasecmp(key, "LABEL") == 0) {
+ add_rule_key(rule, &rule->label, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "GOTO") == 0) {
+ add_rule_key(rule, &rule->goto_label, operation, value);
valid = 1;
continue;
}
rule->ignore_remove = 1;
}
}
- if (value[0] == '\0') {
- dbg("name empty device should be ignored");
- rule->name.operation = operation;
- rule->ignore_device = 1;
- } else
- add_rule_key(rule, &rule->name, operation, value);
+ if (value[0] == '\0')
+ dbg("name empty, node creation supressed");
+ add_rule_key(rule, &rule->name, operation, value);
continue;
}
char owner[32];
uid_t uid = lookup_user(value);
dbg("replacing username='%s' by id=%i", value, uid);
- sprintf(owner, "%li", uid);
+ sprintf(owner, "%u", (unsigned int) uid);
add_rule_key(rule, &rule->owner, operation, owner);
continue;
}
char group[32];
gid_t gid = lookup_group(value);
dbg("replacing groupname='%s' by id=%i", value, gid);
- sprintf(group, "%li", gid);
- add_rule_key(rule, &rule->owner, operation, group);
+ sprintf(group, "%u", (unsigned int) gid);
+ add_rule_key(rule, &rule->group, operation, group);
continue;
}
}
continue;
}
- if (strcasecmp(key, "RUN") == 0) {
- add_rule_key(rule, &rule->run, operation, value);
- valid = 1;
- continue;
- }
-
if (strcasecmp(key, "OPTIONS") == 0) {
+ const char *pos;
+
if (strstr(value, "last_rule") != NULL) {
dbg("last rule to be applied");
rule->last_rule = 1;
dbg("remove event should be ignored");
rule->ignore_remove = 1;
}
+ pos = strstr(value, "link_priority=");
+ if (pos != NULL) {
+ rule->link_priority = atoi(&pos[strlen("link_priority=")]);
+ info("link priority=%i", rule->link_priority);
+ }
if (strstr(value, "all_partitions") != NULL) {
dbg("creation of partition nodes requested");
rule->partitions = DEFAULT_PARTITIONS_COUNT;
continue;
}
- err("unknown key '%s', in '%s'", key, line);
+ err("unknown key '%s' in %s:%u", key, filename, lineno);
}
+ if (physdev && rule->wait_for_sysfs.operation == KEY_OP_UNSET)
+ err("PHYSDEV* values are deprecated and will be removed from a future kernel, "
+ "please fix it in %s:%u", filename, lineno);
+
/* skip line if not any valid key was found */
- if (!valid) {
- err("invalid rule '%s'", line);
- goto exit;
- }
+ if (!valid)
+ goto invalid;
/* grow buffer and add rule */
rule_size = sizeof(struct udev_rule) + rule->bufsize;
+ padding = (sizeof(size_t) - rule_size % sizeof(size_t)) % sizeof(size_t);
+ dbg("add %zi padding bytes", padding);
+ rule_size += padding;
+ rule->bufsize += padding;
+
rules->buf = realloc(rules->buf, rules->bufsize + rule_size);
if (!rules->buf) {
err("realloc failed");
goto exit;
}
+ dbg("adding rule to offset %zi", rules->bufsize);
memcpy(rules->buf + rules->bufsize, rule, rule_size);
rules->bufsize += rule_size;
exit:
free(rule);
return 0;
+
+invalid:
+ free(rule);
+ err("invalid rule '%s:%u'", filename, lineno);
+ return -1;
}
static int parse_file(struct udev_rules *rules, const char *filename)
{
char line[LINE_SIZE];
char *bufline;
- int lineno;
+ unsigned int lineno;
char *buf;
size_t bufsize;
size_t cur;
int retval = 0;
if (file_map(filename, &buf, &bufsize) != 0) {
- err("can't open '%s' as rules file", filename);
+ err("can't open '%s' as rules file: %s", filename, strerror(errno));
return -1;
}
- dbg("reading '%s' as rules file", filename);
+ info("reading '%s' as rules file", filename);
/* loop through the whole file */
cur = 0;
cur += count+1;
lineno++;
- if (count >= sizeof(line)) {
- info("line too long, rule skipped %s, line %d", filename, lineno);
- continue;
- }
-
/* eat the whitespace */
while ((count > 0) && isspace(bufline[0])) {
bufline++;
if (bufline[0] == COMMENT_CHARACTER)
continue;
- /* skip backslash and newline from multi line rules */
+ if (count >= sizeof(line)) {
+ err("line too long, rule skipped '%s:%u'", filename, lineno);
+ continue;
+ }
+
+ /* skip backslash and newline from multiline rules */
for (i = j = 0; i < count; i++) {
if (bufline[i] == '\\' && bufline[i+1] == '\n')
continue;
line[j] = '\0';
dbg("read '%s'", line);
- add_to_rules(rules, line);
+ add_to_rules(rules, line, filename, lineno);
}
file_unmap(buf, bufsize);
return retval;
}
-static int rules_map(struct udev_rules *rules, const char *filename)
-{
- if (file_map(filename, &rules->buf, &rules->bufsize)) {
- rules->buf = NULL;
- return -1;
- }
- if (rules->bufsize == 0) {
- file_unmap(rules->buf, rules->bufsize);
- rules->buf = NULL;
- return -1;
- }
-
- return 0;
-}
-
int udev_rules_init(struct udev_rules *rules, int resolve_names)
{
- char comp[PATH_SIZE];
struct stat stats;
int retval;
memset(rules, 0x00, sizeof(struct udev_rules));
rules->resolve_names = resolve_names;
- /* check for precompiled rules */
- strlcpy(comp, udev_rules_filename, sizeof(comp));
- strlcat(comp, ".compiled", sizeof(comp));
- if (stat(comp, &stats) == 0) {
- dbg("map compiled rules '%s'", comp);
- if (rules_map(rules, comp) == 0)
- return 0;
- }
-
- if (stat(udev_rules_filename, &stats) != 0)
+ /* parse rules file or all matching files in directory */
+ if (stat(udev_rules_dir, &stats) != 0)
return -1;
if ((stats.st_mode & S_IFMT) != S_IFDIR) {
- dbg("parse single rules file '%s'", udev_rules_filename);
- retval = parse_file(rules, udev_rules_filename);
+ dbg("parse single rules file '%s'", udev_rules_dir);
+ retval = parse_file(rules, udev_rules_dir);
} else {
struct name_entry *name_loop, *name_tmp;
LIST_HEAD(name_list);
- dbg("parse rules directory '%s'", udev_rules_filename);
- retval = add_matching_files(&name_list, udev_rules_filename, RULEFILE_SUFFIX);
+ dbg("parse rules directory '%s'", udev_rules_dir);
+ retval = add_matching_files(&name_list, udev_rules_dir, RULESFILE_SUFFIX);
list_for_each_entry_safe(name_loop, name_tmp, &name_list, node) {
- parse_file(rules, name_loop->name);
+ if (stat(name_loop->name, &stats) == 0) {
+ if (stats.st_size)
+ parse_file(rules, name_loop->name);
+ else
+ dbg("empty rules file '%s'", name_loop->name);
+ } else
+ err("could not read '%s': %s", name_loop->name, strerror(errno));
list_del(&name_loop->node);
+ free(name_loop);
}
}
return retval;
}
-void udev_rules_close(struct udev_rules *rules)
+void udev_rules_cleanup(struct udev_rules *rules)
{
- if (rules->mapped)
- file_unmap(rules->buf, rules->bufsize);
- else
+ if (rules->buf) {
free(rules->buf);
-
- rules->buf = NULL;
+ rules->buf = NULL;
+ }
}
~ianmdlvl / elogind.git / blobdiff