#include "logging.h"
#include "udev_rules.h"
-LIST_HEAD(udev_rule_list);
-static int add_config_dev(struct udev_rule *rule)
+void udev_rules_iter_init(struct udev_rules *rules)
{
- struct udev_rule *tmp_rule;
-
- tmp_rule = malloc(sizeof(*tmp_rule));
- if (tmp_rule == NULL)
- return -ENOMEM;
- memcpy(tmp_rule, rule, sizeof(struct udev_rule));
- list_add_tail(&tmp_rule->node, &udev_rule_list);
-
- dbg("name='%s', symlink='%s', bus='%s', id='%s', "
- "sysfs_file[0]='%s', sysfs_value[0]='%s', "
- "kernel='%s', program='%s', result='%s', "
- "owner='%s', group='%s', mode=%#o, "
- "all_partions=%u, ignore_remove=%u, ignore_device=%u, last_rule=%u",
- rule->name, rule->symlink, rule->bus, rule->id,
- rule->sysfs_pair[0].name, rule->sysfs_pair[0].value,
- rule->kernel, rule->program, rule->result, rule->owner, rule->group, rule->mode,
- rule->partitions, rule->ignore_remove, rule->ignore_device, rule->last_rule);
+ dbg("bufsize=%zi", rules->bufsize);
+ rules->current = 0;
+}
- return 0;
+struct udev_rule *udev_rules_iter_next(struct udev_rules *rules)
+{
+ static struct udev_rule *rule;
+
+ if (!rules)
+ return NULL;
+
+ dbg("current=%zi", rules->current);
+ if (rules->current >= rules->bufsize)
+ return NULL;
+
+ /* get next rule */
+ rule = (struct udev_rule *) (rules->buf + rules->current);
+ rules->current += sizeof(struct udev_rule) + rule->bufsize;
+
+ return rule;
}
static int get_key(char **line, char **key, enum key_operation *operation, char **value)
break;
if (linepos[0] == '!')
break;
+ if (linepos[0] == ':')
+ break;
}
/* remember end of key */
*operation = KEY_OP_ASSIGN;
linepos++;
dbg("operator=assign");
+ } else if (linepos[0] == ':' && linepos[1] == '=') {
+ *operation = KEY_OP_ASSIGN_FINAL;
+ linepos += 2;
+ dbg("operator=assign_final");
} else
return -1;
return NULL;
}
-static int rules_parse(const char *filename)
+static int add_rule_key(struct udev_rule *rule, struct key *key,
+ enum key_operation operation, const char *value)
{
- char line[LINE_SIZE];
- char *bufline;
- int lineno;
+ size_t val_len = strnlen(value, PATH_SIZE);
+
+ key->operation = operation;
+
+ key->val_off = rule->bufsize;
+ strlcpy(rule->buf + rule->bufsize, value, val_len+1);
+ rule->bufsize += val_len+1;
+
+ return 0;
+}
+
+static int add_rule_key_pair(struct udev_rule *rule, struct key_pairs *pairs,
+ enum key_operation operation, const char *key, const char *value)
+{
+ size_t key_len = strnlen(key, PATH_SIZE);
+
+ if (pairs->count >= PAIRS_MAX) {
+ err("skip, too many keys in a single rule");
+ return -1;
+ }
+
+ add_rule_key(rule, &pairs->keys[pairs->count].key, operation, value);
+
+ /* add the key-name of the pair */
+ pairs->keys[pairs->count].key_name_off = rule->bufsize;
+ strlcpy(rule->buf + rule->bufsize, key, key_len+1);
+ rule->bufsize += key_len+1;
+
+ pairs->count++;
+
+ return 0;
+}
+
+static int add_to_rules(struct udev_rules *rules, char *line)
+{
+ struct udev_rule *rule;
+ size_t rule_size;
+ int valid;
char *linepos;
char *attr;
- char *buf;
- size_t bufsize;
- size_t cur;
- size_t count;
- int program_given = 0;
- int valid;
- int retval = 0;
- struct udev_rule rule;
+ int retval;
- if (file_map(filename, &buf, &bufsize) != 0) {
- err("can't open '%s' as rules file", filename);
+ /* get all the keys */
+ rule = calloc(1, sizeof (struct udev_rule) + LINE_SIZE);
+ if (!rule) {
+ err("malloc failed");
return -1;
}
- dbg("reading '%s' as rules file", filename);
+ linepos = line;
+ valid = 0;
- /* loop through the whole file */
- cur = 0;
- lineno = 0;
- while (cur < bufsize) {
- unsigned int i, j;
+ while (1) {
+ char *key;
+ char *value;
+ enum key_operation operation = KEY_OP_UNSET;
- count = buf_get_line(buf, bufsize, cur);
- bufline = &buf[cur];
- cur += count+1;
- lineno++;
+ retval = get_key(&linepos, &key, &operation, &value);
+ if (retval)
+ break;
- if (count >= sizeof(line)) {
- info("line too long, rule skipped %s, line %d", filename, lineno);
+ if (strcasecmp(key, "KERNEL") == 0) {
+ add_rule_key(rule, &rule->kernel_name, operation, value);
+ valid = 1;
continue;
}
- /* eat the whitespace */
- while ((count > 0) && isspace(bufline[0])) {
- bufline++;
- count--;
- }
- if (count == 0)
+ if (strcasecmp(key, "SUBSYSTEM") == 0) {
+ add_rule_key(rule, &rule->subsystem, operation, value);
+ valid = 1;
continue;
+ }
- /* see if this is a comment */
- if (bufline[0] == COMMENT_CHARACTER)
+ if (strcasecmp(key, "ACTION") == 0) {
+ add_rule_key(rule, &rule->action, operation, value);
+ valid = 1;
continue;
-
- /* skip backslash and newline from multi line rules */
- for (i = j = 0; i < count; i++) {
- if (bufline[i] == '\\' && bufline[i+1] == '\n')
- continue;
-
- line[j++] = bufline[i];
}
- line[j] = '\0';
- dbg("read '%s'", line);
- /* get all known keys */
- memset(&rule, 0x00, sizeof(struct udev_rule));
- linepos = line;
- valid = 0;
+ if (strcasecmp(key, "DEVPATH") == 0) {
+ add_rule_key(rule, &rule->devpath, operation, value);
+ valid = 1;
+ continue;
+ }
- while (1) {
- char *key;
- char *value;
- enum key_operation operation = KEY_OP_UNSET;
+ if (strcasecmp(key, "BUS") == 0) {
+ add_rule_key(rule, &rule->bus, operation, value);
+ valid = 1;
+ continue;
+ }
- retval = get_key(&linepos, &key, &operation, &value);
- if (retval)
- break;
+ if (strcasecmp(key, "ID") == 0) {
+ add_rule_key(rule, &rule->id, operation, value);
+ valid = 1;
+ continue;
+ }
- if (strcasecmp(key, KEY_KERNEL) == 0) {
- strlcpy(rule.kernel, value, sizeof(rule.kernel));
- rule.kernel_operation = operation;
- valid = 1;
+ 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;
}
+ add_rule_key_pair(rule, &rule->sysfs, operation, attr, value);
+ valid = 1;
+ continue;
+ }
- if (strcasecmp(key, KEY_SUBSYSTEM) == 0) {
- strlcpy(rule.subsystem, value, sizeof(rule.subsystem));
- rule.subsystem_operation = operation;
- valid = 1;
+ 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;
}
+ add_rule_key_pair(rule, &rule->env, operation, attr, value);
+ valid = 1;
+ continue;
+ }
- if (strcasecmp(key, KEY_BUS) == 0) {
- strlcpy(rule.bus, value, sizeof(rule.bus));
- rule.bus_operation = operation;
- valid = 1;
- continue;
- }
+ if (strcasecmp(key, "MODALIAS") == 0) {
+ add_rule_key(rule, &rule->modalias, operation, value);
+ valid = 1;
+ continue;
+ }
- if (strcasecmp(key, KEY_ID) == 0) {
- strlcpy(rule.id, value, sizeof(rule.id));
- rule.id_operation = operation;
- valid = 1;
- continue;
+ if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
+ attr = get_key_attribute(key + sizeof("IMPORT")-1);
+ if (attr && strstr(attr, "program")) {
+ dbg("IMPORT will be executed");
+ rule->import_exec = 1;
+ } else if (attr && strstr(attr, "file")) {
+ dbg("IMPORT will be included as file");
+ } else {
+ /* figure it out if it is executable */
+ char file[PATH_SIZE];
+ char *pos;
+ struct stat stats;
+
+ strlcpy(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;
+ }
}
+ add_rule_key(rule, &rule->import, operation, value);
+ valid = 1;
+ continue;
+ }
- if (strncasecmp(key, KEY_SYSFS, sizeof(KEY_SYSFS)-1) == 0) {
- struct key_pair *pair;
+ if (strcasecmp(key, "DRIVER") == 0) {
+ add_rule_key(rule, &rule->driver, operation, value);
+ valid = 1;
+ continue;
+ }
- if (rule.sysfs_pair_count >= KEY_SYSFS_PAIRS_MAX) {
- err("skip rule, to many " KEY_SYSFS " keys in a single rule");
- goto error;
+ if (strcasecmp(key, "RESULT") == 0) {
+ add_rule_key(rule, &rule->result, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strcasecmp(key, "PROGRAM") == 0) {
+ add_rule_key(rule, &rule->program, operation, value);
+ valid = 1;
+ continue;
+ }
+
+ if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
+ attr = get_key_attribute(key + sizeof("NAME")-1);
+ if (attr != NULL) {
+ if (strstr(attr, "all_partitions") != NULL) {
+ dbg("creation of partition nodes requested");
+ rule->partitions = DEFAULT_PARTITIONS_COUNT;
}
- pair = &rule.sysfs_pair[rule.sysfs_pair_count];
- attr = get_key_attribute(key + sizeof(KEY_SYSFS)-1);
- if (attr == NULL) {
- err("error parsing " KEY_SYSFS " attribute");
- goto error;
+ if (strstr(attr, "ignore_remove") != NULL) {
+ dbg("remove event should be ignored");
+ rule->ignore_remove = 1;
}
- strlcpy(pair->name, attr, sizeof(pair->name));
- strlcpy(pair->value, value, sizeof(pair->value));
- pair->operation = operation;
- rule.sysfs_pair_count++;
- valid = 1;
- continue;
}
+ add_rule_key(rule, &rule->name, operation, value);
+ continue;
+ }
- if (strncasecmp(key, KEY_ENV, sizeof(KEY_ENV)-1) == 0) {
- struct key_pair *pair;
+ if (strcasecmp(key, "SYMLINK") == 0) {
+ add_rule_key(rule, &rule->symlink, operation, value);
+ valid = 1;
+ continue;
+ }
- if (rule.env_pair_count >= KEY_ENV_PAIRS_MAX) {
- err("skip rule, to many " KEY_ENV " keys in a single rule");
- goto error;
- }
- pair = &rule.env_pair[rule.env_pair_count];
- attr = get_key_attribute(key + sizeof(KEY_ENV)-1);
- if (attr == NULL) {
- err("error parsing " KEY_ENV " attribute");
+ if (strcasecmp(key, "OWNER") == 0) {
+ valid = 1;
+ if (rules->resolve_names) {
+ char *endptr;
+ strtoul(value, &endptr, 10);
+ if (endptr[0] != '\0') {
+ char owner[32];
+ uid_t uid = lookup_user(value);
+ dbg("replacing username='%s' by id=%i", value, uid);
+ sprintf(owner, "%li", uid);
+ add_rule_key(rule, &rule->owner, operation, owner);
continue;
}
- strlcpy(pair->name, attr, sizeof(pair->name));
- strlcpy(pair->value, value, sizeof(pair->value));
- pair->operation = operation;
- rule.env_pair_count++;
- valid = 1;
- continue;
}
- if (strcasecmp(key, KEY_DRIVER) == 0) {
- strlcpy(rule.driver, value, sizeof(rule.driver));
- rule.driver_operation = operation;
- valid = 1;
- continue;
- }
+ add_rule_key(rule, &rule->owner, operation, value);
+ continue;
+ }
- if (strcasecmp(key, KEY_RESULT) == 0) {
- strlcpy(rule.result, value, sizeof(rule.result));
- rule.result_operation = operation;
- valid = 1;
- continue;
+ if (strcasecmp(key, "GROUP") == 0) {
+ valid = 1;
+ if (rules->resolve_names) {
+ char *endptr;
+ strtoul(value, &endptr, 10);
+ if (endptr[0] != '\0') {
+ 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);
+ continue;
+ }
}
- if (strcasecmp(key, KEY_PROGRAM) == 0) {
- strlcpy(rule.program, value, sizeof(rule.program));
- rule.program_operation = operation;
- program_given = 1;
- valid = 1;
- continue;
- }
+ add_rule_key(rule, &rule->group, operation, value);
+ continue;
+ }
- if (strncasecmp(key, KEY_NAME, sizeof(KEY_NAME)-1) == 0) {
- attr = get_key_attribute(key + sizeof(KEY_NAME)-1);
- /* FIXME: remove old style options and make OPTIONS= mandatory */
- if (attr != NULL) {
- if (strstr(attr, OPTION_PARTITIONS) != NULL) {
- dbg("creation of partition nodes requested");
- rule.partitions = DEFAULT_PARTITIONS_COUNT;
- }
- if (strstr(attr, OPTION_IGNORE_REMOVE) != NULL) {
- dbg("remove event should be ignored");
- rule.ignore_remove = 1;
- }
- }
- if (value[0] != '\0')
- strlcpy(rule.name, value, sizeof(rule.name));
- else
- rule.ignore_device = 1;
- valid = 1;
- continue;
- }
+ if (strcasecmp(key, "MODE") == 0) {
+ rule->mode = strtol(value, NULL, 8);
+ rule->mode_operation = operation;
+ valid = 1;
+ continue;
+ }
- if (strcasecmp(key, KEY_SYMLINK) == 0) {
- strlcpy(rule.symlink, value, sizeof(rule.symlink));
- valid = 1;
- continue;
- }
+ if (strcasecmp(key, "RUN") == 0) {
+ add_rule_key(rule, &rule->run, operation, value);
+ valid = 1;
+ continue;
+ }
- if (strcasecmp(key, KEY_OWNER) == 0) {
- strlcpy(rule.owner, value, sizeof(rule.owner));
- valid = 1;
- continue;
+ if (strcasecmp(key, "OPTIONS") == 0) {
+ if (strstr(value, "last_rule") != NULL) {
+ dbg("last rule to be applied");
+ rule->last_rule = 1;
}
-
- if (strcasecmp(key, KEY_GROUP) == 0) {
- strlcpy(rule.group, value, sizeof(rule.group));
- valid = 1;
- continue;
+ if (strstr(value, "ignore_device") != NULL) {
+ dbg("device should be ignored");
+ rule->ignore_device = 1;
}
-
- if (strcasecmp(key, KEY_MODE) == 0) {
- rule.mode = strtol(value, NULL, 8);
- valid = 1;
- continue;
+ if (strstr(value, "ignore_remove") != NULL) {
+ dbg("remove event should be ignored");
+ rule->ignore_remove = 1;
}
-
- if (strcasecmp(key, KEY_OPTIONS) == 0) {
- if (strstr(value, OPTION_LAST_RULE) != NULL) {
- dbg("last rule to be applied");
- rule.last_rule = 1;
- }
- if (strstr(value, OPTION_IGNORE_DEVICE) != NULL) {
- dbg("device should be ignored");
- rule.ignore_device = 1;
- }
- if (strstr(value, OPTION_IGNORE_REMOVE) != NULL) {
- dbg("remove event should be ignored");
- rule.ignore_remove = 1;
- }
- if (strstr(value, OPTION_PARTITIONS) != NULL) {
- dbg("creation of partition nodes requested");
- rule.partitions = DEFAULT_PARTITIONS_COUNT;
- }
- valid = 1;
- continue;
+ if (strstr(value, "all_partitions") != NULL) {
+ dbg("creation of partition nodes requested");
+ rule->partitions = DEFAULT_PARTITIONS_COUNT;
}
-
- err("unknown key '%s'", key);
- goto error;
+ valid = 1;
+ continue;
}
- /* skip line if not any valid key was found */
- if (!valid)
- goto error;
+ err("unknown key '%s', in '%s'", key, line);
+ }
+
+ /* skip line if not any valid key was found */
+ if (!valid) {
+ err("invalid rule '%s'", line);
+ goto exit;
+ }
+
+ /* grow buffer and add rule */
+ rule_size = sizeof(struct udev_rule) + rule->bufsize;
+ rules->buf = realloc(rules->buf, rules->bufsize + rule_size);
+ if (!rules->buf) {
+ err("realloc failed");
+ goto exit;
+ }
+ memcpy(rules->buf + rules->bufsize, rule, rule_size);
+ rules->bufsize += rule_size;
+exit:
+ free(rule);
+ return 0;
+}
+
+static int parse_file(struct udev_rules *rules, const char *filename)
+{
+ char line[LINE_SIZE];
+ char *bufline;
+ int lineno;
+ char *buf;
+ size_t bufsize;
+ size_t cur;
+ size_t count;
+ int retval = 0;
+
+ if (file_map(filename, &buf, &bufsize) != 0) {
+ err("can't open '%s' as rules file", filename);
+ return -1;
+ }
+ dbg("reading '%s' as rules file", filename);
+
+ /* loop through the whole file */
+ cur = 0;
+ lineno = 0;
+ while (cur < bufsize) {
+ unsigned int i, j;
- if ((rule.result[0] != '\0') && (program_given == 0)) {
- info(KEY_RESULT " is only useful when " KEY_PROGRAM " is called in any rule before");
- goto error;
+ count = buf_get_line(buf, bufsize, cur);
+ bufline = &buf[cur];
+ cur += count+1;
+ lineno++;
+
+ if (count >= sizeof(line)) {
+ info("line too long, rule skipped %s, line %d", filename, lineno);
+ continue;
}
- rule.config_line = lineno;
- strlcpy(rule.config_file, filename, sizeof(rule.config_file));
- retval = add_config_dev(&rule);
- if (retval) {
- dbg("add_config_dev returned with error %d", retval);
+ /* eat the whitespace */
+ while ((count > 0) && isspace(bufline[0])) {
+ bufline++;
+ count--;
+ }
+ if (count == 0)
+ continue;
+
+ /* see if this is a comment */
+ if (bufline[0] == COMMENT_CHARACTER)
continue;
-error:
- err("parse error %s, line %d:%d, rule skipped",
- filename, lineno, (int) (linepos - line));
+
+ /* skip backslash and newline from multi line rules */
+ for (i = j = 0; i < count; i++) {
+ if (bufline[i] == '\\' && bufline[i+1] == '\n')
+ continue;
+
+ line[j++] = bufline[i];
}
+ line[j] = '\0';
+
+ dbg("read '%s'", line);
+ add_to_rules(rules, line);
}
file_unmap(buf, bufsize);
return retval;
}
-int udev_rules_init(void)
+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)
return -1;
- if ((stats.st_mode & S_IFMT) != S_IFDIR)
- retval = rules_parse(udev_rules_filename);
- else {
+ 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);
+ dbg("parse rules directory '%s'", udev_rules_filename);
retval = add_matching_files(&name_list, udev_rules_filename, RULEFILE_SUFFIX);
list_for_each_entry_safe(name_loop, name_tmp, &name_list, node) {
- rules_parse(name_loop->name);
+ parse_file(rules, name_loop->name);
list_del(&name_loop->node);
}
}
return retval;
}
-void udev_rules_close(void)
+void udev_rules_close(struct udev_rules *rules)
{
- struct udev_rule *rule;
- struct udev_rule *temp_rule;
+ if (rules->mapped)
+ file_unmap(rules->buf, rules->bufsize);
+ else
+ free(rules->buf);
- list_for_each_entry_safe(rule, temp_rule, &udev_rule_list, node) {
- list_del(&rule->node);
- free(rule);
- }
+ rules->buf = NULL;
}
-
~ianmdlvl / elogind.git / blobdiff