/*
- * udev_rules_parse.c
- *
* 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"
+#include "udev_selinux.h"
void udev_rules_iter_init(struct udev_rules *rules)
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 */
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)
{
+ char buf[sizeof(struct udev_rule) + LINE_SIZE];
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 */
- rule = calloc(1, sizeof (struct udev_rule) + LINE_SIZE);
- if (!rule) {
- err("malloc failed");
- return -1;
- }
+ memset(buf, 0x00, sizeof(buf));
+ rule = (struct udev_rule *) buf;
linepos = line;
valid = 0;
+ /* get all the keys */
while (1) {
char *key;
char *value;
if (retval)
break;
- if (strcasecmp(key, "LABEL") == 0) {
- add_rule_key(rule, &rule->label, operation, value);
+ 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, "GOTO") == 0) {
- add_rule_key(rule, &rule->goto_label, operation, value);
+ 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, "MODALIAS") == 0) {
- add_rule_key(rule, &rule->modalias, operation, value);
+ if (strcasecmp(key, "PROGRAM") == 0) {
+ add_rule_key(rule, &rule->program, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ 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;
}
if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
attr = get_key_attribute(key + sizeof("IMPORT")-1);
- if (attr && strstr(attr, "program")) {
+ if (attr != NULL && strstr(attr, "program")) {
dbg("IMPORT will be executed");
rule->import_type = IMPORT_PROGRAM;
- } else if (attr && strstr(attr, "file")) {
+ } else if (attr != NULL && strstr(attr, "file")) {
dbg("IMPORT will be included as file");
rule->import_type = IMPORT_FILE;
- } else if (attr && strstr(attr, "parent")) {
+ } else if (attr != NULL && 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];
char *pos;
- struct stat stats;
+ struct stat statbuf;
strlcpy(file, value, sizeof(file));
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)) {
+ if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
dbg("IMPORT is executable, will be executed (autotype)");
rule->import_type = IMPORT_PROGRAM;
} else {
continue;
}
- if (strcasecmp(key, "DRIVER") == 0) {
- add_rule_key(rule, &rule->driver, operation, value);
+ if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
+ if (operation != KEY_OP_MATCH &&
+ operation != KEY_OP_NOMATCH) {
+ err("invalid TEST operation");
+ goto invalid;
+ }
+ attr = get_key_attribute(key + sizeof("TEST")-1);
+ if (attr != NULL)
+ rule->test_mode_mask = strtol(attr, NULL, 8);
+ add_rule_key(rule, &rule->test, operation, value);
valid = 1;
continue;
}
- if (strcasecmp(key, "RESULT") == 0) {
- add_rule_key(rule, &rule->result, operation, value);
+ if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
+ attr = get_key_attribute(key + sizeof("RUN")-1);
+ if (attr != NULL) {
+ if (strstr(attr, "ignore_error"))
+ rule->run_ignore_error = 1;
+ }
+ add_rule_key(rule, &rule->run, operation, value);
valid = 1;
continue;
}
- if (strcasecmp(key, "PROGRAM") == 0) {
- add_rule_key(rule, &rule->program, 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, "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;
}
if (strcasecmp(key, "SYMLINK") == 0) {
- add_rule_key(rule, &rule->symlink, operation, value);
+ if (operation == KEY_OP_MATCH ||
+ operation == KEY_OP_NOMATCH)
+ add_rule_key(rule, &rule->symlink_match, operation, value);
+ else
+ add_rule_key(rule, &rule->symlink, operation, value);
valid = 1;
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=")]);
+ dbg("link priority=%i", rule->link_priority);
+ }
+ pos = strstr(value, "string_escape=");
+ if (pos != NULL) {
+ pos = &pos[strlen("string_escape=")];
+ if (strncmp(pos, "none", strlen("none")) == 0)
+ rule->string_escape = ESCAPE_NONE;
+ else if (strncmp(pos, "replace", strlen("replace")) == 0)
+ rule->string_escape = ESCAPE_REPLACE;
+ }
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;
memcpy(rules->buf + rules->bufsize, rule, rule_size);
rules->bufsize += rule_size;
exit:
- free(rule);
return 0;
+
+invalid:
+ 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;
- }
- rules->mapped = 1;
-
- return 0;
-}
-
-int udev_rules_init(struct udev_rules *rules, int read_compiled, int resolve_names)
+int udev_rules_init(struct udev_rules *rules, int resolve_names)
{
- char comp[PATH_SIZE];
- struct stat stats;
- int retval;
+ struct stat statbuf;
+ char filename[PATH_MAX];
+ LIST_HEAD(name_list);
+ LIST_HEAD(dyn_list);
+ struct name_entry *name_loop, *name_tmp;
+ struct name_entry *dyn_loop, *dyn_tmp;
+ int retval = 0;
memset(rules, 0x00, sizeof(struct udev_rules));
rules->resolve_names = resolve_names;
- /* check for precompiled rules */
- if (read_compiled) {
- 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;
- }
+ /* read main config from single file or all files in a directory */
+ if (stat(udev_rules_dir, &statbuf) != 0)
+ return -1;
+ if ((statbuf.st_mode & S_IFMT) != S_IFDIR) {
+ dbg("parse single rules file '%s'", udev_rules_dir);
+ name_list_add(&name_list, udev_rules_dir, 1);
+ } else {
+ dbg("parse rules directory '%s'", udev_rules_dir);
+ retval = add_matching_files(&name_list, udev_rules_dir, RULESFILE_SUFFIX);
}
- /* parse rules file or all matching files in directory */
- if (stat(udev_rules_filename, &stats) != 0)
- return -1;
+ /* read dynamic rules directory */
+ strlcpy(filename, udev_root, sizeof(filename));
+ strlcat(filename, "/"RULES_DYN_DIR, sizeof(filename));
+ if (stat(filename, &statbuf) != 0) {
+ create_path(filename);
+ selinux_setfscreatecon(filename, NULL, S_IFDIR|0755);
+ mkdir(filename, 0755);
+ selinux_resetfscreatecon();
+ }
+ add_matching_files(&dyn_list, filename, RULESFILE_SUFFIX);
- if ((stats.st_mode & S_IFMT) != S_IFDIR) {
- dbg("parse single rules file '%s'", udev_rules_filename);
- retval = parse_file(rules, udev_rules_filename);
- } else {
- struct name_entry *name_loop, *name_tmp;
- LIST_HEAD(name_list);
+ /* sort dynamic rules files by basename into list of files */
+ list_for_each_entry_safe(dyn_loop, dyn_tmp, &dyn_list, node) {
+ const char *dyn_base = strrchr(dyn_loop->name, '/');
- dbg("parse rules directory '%s'", udev_rules_filename);
- retval = add_matching_files(&name_list, udev_rules_filename, RULEFILE_SUFFIX);
+ if (dyn_base == NULL)
+ continue;
list_for_each_entry_safe(name_loop, name_tmp, &name_list, node) {
- 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
- dbg("could not read '%s'", name_loop->name);
- list_del(&name_loop->node);
- free(name_loop);
+ const char *name_base = strrchr(name_loop->name, '/');
+
+ if (name_base == NULL)
+ continue;
+
+ if (strcmp(name_base, dyn_base) > 0)
+ break;
}
+ list_move_tail(&dyn_loop->node, &name_loop->node);
+ }
+
+ /* parse list of files */
+ list_for_each_entry_safe(name_loop, name_tmp, &name_list, node) {
+ if (stat(name_loop->name, &statbuf) == 0) {
+ if (statbuf.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->buf) {
- if (rules->mapped) {
- rules->mapped = 0;
- file_unmap(rules->buf, rules->bufsize);
- } else
- free(rules->buf);
+ free(rules->buf);
rules->buf = NULL;
}
}
+
~ianmdlvl / elogind.git / blobdiff