diff options
Diffstat (limited to 'udev/udev-rules-parse.c')
| -rw-r--r-- | udev/udev-rules-parse.c | 850 |
1 files changed, 850 insertions, 0 deletions
diff --git a/udev/udev-rules-parse.c b/udev/udev-rules-parse.c new file mode 100644 index 0000000000..354ed2882d --- /dev/null +++ b/udev/udev-rules-parse.c @@ -0,0 +1,850 @@ +/* + * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com> + * Copyright (C) 2003-2008 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, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <stddef.h> +#include <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <ctype.h> +#include <unistd.h> +#include <sys/stat.h> +#include <errno.h> + +#include "udev.h" +#include "udev-rules.h" + + +void udev_rules_iter_init(struct udev_rules_iter *iter, struct udev_rules *rules) +{ + dbg(rules->udev, "bufsize=%zi\n", rules->bufsize); + iter->rules = rules; + iter->current = 0; +} + +struct udev_rule *udev_rules_iter_next(struct udev_rules_iter *iter) +{ + struct udev_rules *rules; + struct udev_rule *rule; + + rules = iter->rules; + if (!rules) + return NULL; + + dbg(rules->udev, "current=%zi\n", iter->current); + if (iter->current >= rules->bufsize) { + dbg(rules->udev, "no more rules\n"); + return NULL; + } + + /* get next rule */ + rule = (struct udev_rule *) (rules->buf + iter->current); + iter->current += sizeof(struct udev_rule) + rule->bufsize; + + return rule; +} + +struct udev_rule *udev_rules_iter_goto(struct udev_rules_iter *iter, size_t rule_off) +{ + struct udev_rules *rules = iter->rules; + struct udev_rule *rule; + + dbg(rules->udev, "current=%zi\n", iter->current); + iter->current = rule_off; + rule = (struct udev_rule *) (rules->buf + iter->current); + + return rule; +} + +static size_t find_label(const struct udev_rules_iter *iter, const char *label) +{ + struct udev_rule *rule; + struct udev_rules *rules = iter->rules; + size_t current = iter->current; + +next: + dbg(rules->udev, "current=%zi\n", current); + if (current >= rules->bufsize) { + dbg(rules->udev, "LABEL='%s' not found\n", label); + return 0; + } + rule = (struct udev_rule *) (rules->buf + current); + + if (strcmp(&rule->buf[rule->label.val_off], label) != 0) { + dbg(rules->udev, "moving forward, looking for label '%s'\n", label); + current += sizeof(struct udev_rule) + rule->bufsize; + goto next; + } + + dbg(rules->udev, "found label '%s'\n", label); + return current; +} + +static int get_key(struct udev_rules *rules, char **line, char **key, enum key_operation *operation, char **value) +{ + char *linepos; + char *temp; + + linepos = *line; + if (linepos == NULL && linepos[0] == '\0') + return -1; + + /* skip whitespace */ + while (isspace(linepos[0]) || linepos[0] == ',') + linepos++; + + /* get the key */ + if (linepos[0] == '\0') + return -1; + *key = linepos; + + while (1) { + linepos++; + if (linepos[0] == '\0') + return -1; + if (isspace(linepos[0])) + break; + if (linepos[0] == '=') + break; + if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':')) + if (linepos[1] == '=') + break; + } + + /* remember end of key */ + temp = linepos; + + /* skip whitespace after key */ + while (isspace(linepos[0])) + linepos++; + if (linepos[0] == '\0') + return -1; + + /* get operation type */ + if (linepos[0] == '=' && linepos[1] == '=') { + *operation = KEY_OP_MATCH; + linepos += 2; + dbg(rules->udev, "operator=match\n"); + } else if (linepos[0] == '!' && linepos[1] == '=') { + *operation = KEY_OP_NOMATCH; + linepos += 2; + dbg(rules->udev, "operator=nomatch\n"); + } else if (linepos[0] == '+' && linepos[1] == '=') { + *operation = KEY_OP_ADD; + linepos += 2; + dbg(rules->udev, "operator=add\n"); + } else if (linepos[0] == '=') { + *operation = KEY_OP_ASSIGN; + linepos++; + dbg(rules->udev, "operator=assign\n"); + } else if (linepos[0] == ':' && linepos[1] == '=') { + *operation = KEY_OP_ASSIGN_FINAL; + linepos += 2; + dbg(rules->udev, "operator=assign_final\n"); + } else + return -1; + + /* terminate key */ + temp[0] = '\0'; + dbg(rules->udev, "key='%s'\n", *key); + + /* skip whitespace after operator */ + while (isspace(linepos[0])) + linepos++; + if (linepos[0] == '\0') + return -1; + + /* get the value*/ + if (linepos[0] == '"') + linepos++; + else + return -1; + *value = linepos; + + temp = strchr(linepos, '"'); + if (!temp) + return -1; + temp[0] = '\0'; + temp++; + dbg(rules->udev, "value='%s'\n", *value); + + /* move line to next key */ + *line = temp; + + return 0; +} + +/* extract possible KEY{attr} */ +static char *get_key_attribute(struct udev_rules *rules, char *str) +{ + char *pos; + char *attr; + + attr = strchr(str, '{'); + if (attr != NULL) { + attr++; + pos = strchr(attr, '}'); + if (pos == NULL) { + err(rules->udev, "missing closing brace for format\n"); + return NULL; + } + pos[0] = '\0'; + dbg(rules->udev, "attribute='%s'\n", attr); + return attr; + } + + return NULL; +} + +static int add_rule_key(struct udev_rule *rule, struct key *key, + enum key_operation operation, const char *value) +{ + size_t val_len = strnlen(value, UTIL_PATH_SIZE); + + key->operation = operation; + + key->val_off = rule->bufsize; + util_strlcpy(rule->buf + rule->bufsize, value, val_len+1); + rule->bufsize += val_len+1; + + return 0; +} + +static int add_rule_key_pair(struct udev_rules *rules, struct udev_rule *rule, struct key_pairs *pairs, + enum key_operation operation, const char *key, const char *value) +{ + size_t key_len = strnlen(key, UTIL_PATH_SIZE); + + if (pairs->count >= PAIRS_MAX) { + err(rules->udev, "skip, too many keys of the same type in a single rule\n"); + 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; + util_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, const char *filename, unsigned int lineno) +{ + char buf[sizeof(struct udev_rule) + UTIL_LINE_SIZE]; + struct udev_rule *rule; + size_t rule_size; + int valid; + char *linepos; + char *attr; + size_t padding; + int physdev = 0; + int retval; + + memset(buf, 0x00, sizeof(buf)); + rule = (struct udev_rule *) buf; + rule->event_timeout = -1; + linepos = line; + valid = 0; + + /* get all the keys */ + while (1) { + char *key; + char *value; + enum key_operation operation = KEY_OP_UNSET; + + retval = get_key(rules, &linepos, &key, &operation, &value); + if (retval) + break; + + if (strcasecmp(key, "ACTION") == 0) { + if (operation != KEY_OP_MATCH && + operation != KEY_OP_NOMATCH) { + err(rules->udev, "invalid ACTION operation\n"); + 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(rules->udev, "invalid DEVPATH operation\n"); + goto invalid; + } + add_rule_key(rule, &rule->devpath, operation, value); + valid = 1; + continue; + } + + if (strcasecmp(key, "KERNEL") == 0) { + if (operation != KEY_OP_MATCH && + operation != KEY_OP_NOMATCH) { + err(rules->udev, "invalid KERNEL operation\n"); + goto invalid; + } + add_rule_key(rule, &rule->kernel, operation, value); + valid = 1; + continue; + } + + if (strcasecmp(key, "SUBSYSTEM") == 0) { + if (operation != KEY_OP_MATCH && + operation != KEY_OP_NOMATCH) { + err(rules->udev, "invalid SUBSYSTEM operation\n"); + 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(rules->udev, "'%s' must be specified as 'subsystem' \n" + "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, "DRIVER") == 0) { + if (operation != KEY_OP_MATCH && + operation != KEY_OP_NOMATCH) { + err(rules->udev, "invalid DRIVER operation\n"); + goto invalid; + } + add_rule_key(rule, &rule->driver, operation, value); + valid = 1; + continue; + } + + if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) { + attr = get_key_attribute(rules, key + sizeof("ATTR")-1); + if (attr == NULL) { + err(rules->udev, "error parsing ATTR attribute\n"); + goto invalid; + } + if (add_rule_key_pair(rules, rule, &rule->attr, operation, attr, value) != 0) + goto invalid; + valid = 1; + continue; + } + + if (strcasecmp(key, "KERNELS") == 0 || + strcasecmp(key, "ID") == 0) { + if (operation != KEY_OP_MATCH && + operation != KEY_OP_NOMATCH) { + err(rules->udev, "invalid KERNELS operation\n"); + goto invalid; + } + add_rule_key(rule, &rule->kernels, operation, value); + valid = 1; + continue; + } + + if (strcasecmp(key, "SUBSYSTEMS") == 0 || + strcasecmp(key, "BUS") == 0) { + if (operation != KEY_OP_MATCH && + operation != KEY_OP_NOMATCH) { + err(rules->udev, "invalid SUBSYSTEMS operation\n"); + goto invalid; + } + add_rule_key(rule, &rule->subsystems, operation, value); + valid = 1; + continue; + } + + if (strcasecmp(key, "DRIVERS") == 0) { + if (operation != KEY_OP_MATCH && + operation != KEY_OP_NOMATCH) { + err(rules->udev, "invalid DRIVERS operation\n"); + goto invalid; + } + add_rule_key(rule, &rule->drivers, operation, value); + valid = 1; + continue; + } + + 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(rules->udev, "invalid ATTRS operation\n"); + goto invalid; + } + attr = get_key_attribute(rules, key + sizeof("ATTRS")-1); + if (attr == NULL) { + err(rules->udev, "error parsing ATTRS attribute\n"); + goto invalid; + } + if (strncmp(attr, "device/", 7) == 0) + err(rules->udev, "the 'device' link is deprecated and will be removed from a future kernel, \n" + "please fix it in %s:%u", filename, lineno); + else if (strstr(attr, "../") != NULL) + err(rules->udev, "do not reference parent sysfs directories directly, that may break with a future kernel, \n" + "please fix it in %s:%u", filename, lineno); + if (add_rule_key_pair(rules, rule, &rule->attrs, operation, attr, value) != 0) + goto invalid; + valid = 1; + continue; + } + + if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) { + attr = get_key_attribute(rules, key + sizeof("ENV")-1); + if (attr == NULL) { + err(rules->udev, "error parsing ENV attribute\n"); + goto invalid; + } + if (strncmp(attr, "PHYSDEV", 7) == 0) + physdev = 1; + if (add_rule_key_pair(rules, 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, "RESULT") == 0) { + if (operation != KEY_OP_MATCH && + operation != KEY_OP_NOMATCH) { + err(rules->udev, "invalid RESULT operation\n"); + 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(rules, key + sizeof("IMPORT")-1); + if (attr != NULL && strstr(attr, "program")) { + dbg(rules->udev, "IMPORT will be executed\n"); + rule->import_type = IMPORT_PROGRAM; + } else if (attr != NULL && strstr(attr, "file")) { + dbg(rules->udev, "IMPORT will be included as file\n"); + rule->import_type = IMPORT_FILE; + } else if (attr != NULL && strstr(attr, "parent")) { + dbg(rules->udev, "IMPORT will include the parent values\n"); + rule->import_type = IMPORT_PARENT; + } else { + /* figure it out if it is executable */ + char file[UTIL_PATH_SIZE]; + char *pos; + struct stat statbuf; + + util_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) { + util_strlcpy(file, UDEV_PREFIX "/lib/udev/", sizeof(file)); + util_strlcat(file, value, sizeof(file)); + pos = strchr(file, ' '); + if (pos) + pos[0] = '\0'; + } + + dbg(rules->udev, "IMPORT auto mode for '%s'\n", file); + if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) { + dbg(rules->udev, "IMPORT is executable, will be executed (autotype)\n"); + rule->import_type = IMPORT_PROGRAM; + } else { + dbg(rules->udev, "IMPORT is not executable, will be included as file (autotype)\n"); + rule->import_type = IMPORT_FILE; + } + } + add_rule_key(rule, &rule->import, operation, value); + valid = 1; + continue; + } + + if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) { + if (operation != KEY_OP_MATCH && + operation != KEY_OP_NOMATCH) { + err(rules->udev, "invalid TEST operation\n"); + goto invalid; + } + attr = get_key_attribute(rules, 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 (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) { + attr = get_key_attribute(rules, 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, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) { + add_rule_key(rule, &rule->wait_for, 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; + } + + if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) { + attr = get_key_attribute(rules, key + sizeof("NAME")-1); + if (attr != NULL) { + if (strstr(attr, "all_partitions") != NULL) { + dbg(rules->udev, "creation of partition nodes requested\n"); + rule->partitions = DEFAULT_PARTITIONS_COUNT; + } + if (strstr(attr, "ignore_remove") != NULL) { + dbg(rules->udev, "remove event should be ignored\n"); + rule->ignore_remove = 1; + } + } + if (value[0] == '\0') + dbg(rules->udev, "name empty, node creation supressed\n"); + add_rule_key(rule, &rule->name, operation, value); + continue; + } + + if (strcasecmp(key, "SYMLINK") == 0) { + 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; + } + + if (strcasecmp(key, "OWNER") == 0) { + valid = 1; + if (rules->resolve_names && (!strchr(value, '$') && !strchr(value, '%'))) { + char *endptr; + strtoul(value, &endptr, 10); + if (endptr[0] != '\0') { + char owner[32]; + uid_t uid = lookup_user(rules->udev, value); + dbg(rules->udev, "replacing username='%s' by id=%i\n", value, uid); + sprintf(owner, "%u", (unsigned int) uid); + add_rule_key(rule, &rule->owner, operation, owner); + continue; + } + } + + add_rule_key(rule, &rule->owner, operation, value); + continue; + } + + if (strcasecmp(key, "GROUP") == 0) { + valid = 1; + if (rules->resolve_names && (!strchr(value, '$') && !strchr(value, '%'))) { + char *endptr; + strtoul(value, &endptr, 10); + if (endptr[0] != '\0') { + char group[32]; + gid_t gid = lookup_group(rules->udev, value); + dbg(rules->udev, "replacing groupname='%s' by id=%i\n", value, gid); + sprintf(group, "%u", (unsigned int) gid); + add_rule_key(rule, &rule->group, operation, group); + continue; + } + } + + add_rule_key(rule, &rule->group, operation, value); + continue; + } + + if (strcasecmp(key, "MODE") == 0) { + add_rule_key(rule, &rule->mode, operation, value); + valid = 1; + continue; + } + + if (strcasecmp(key, "OPTIONS") == 0) { + const char *pos; + + if (strstr(value, "last_rule") != NULL) { + dbg(rules->udev, "last rule to be applied\n"); + rule->last_rule = 1; + } + if (strstr(value, "ignore_device") != NULL) { + dbg(rules->udev, "device should be ignored\n"); + rule->ignore_device = 1; + } + if (strstr(value, "ignore_remove") != NULL) { + dbg(rules->udev, "remove event should be ignored\n"); + rule->ignore_remove = 1; + } + pos = strstr(value, "link_priority="); + if (pos != NULL) { + rule->link_priority = atoi(&pos[strlen("link_priority=")]); + dbg(rules->udev, "link priority=%i\n", rule->link_priority); + } + pos = strstr(value, "event_timeout="); + if (pos != NULL) { + rule->event_timeout = atoi(&pos[strlen("event_timeout=")]); + dbg(rules->udev, "event timout=%i\n", rule->event_timeout); + } + 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(rules->udev, "creation of partition nodes requested\n"); + rule->partitions = DEFAULT_PARTITIONS_COUNT; + } + valid = 1; + continue; + } + + err(rules->udev, "unknown key '%s' in %s:%u\n", key, filename, lineno); + } + + if (physdev && rule->wait_for.operation == KEY_OP_UNSET) + err(rules->udev, "PHYSDEV* values are deprecated and will be removed from a future kernel, \n" + "please fix it in %s:%u", filename, lineno); + + /* skip line if not any valid key was found */ + 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(rules->udev, "add %zi padding bytes\n", padding); + rule_size += padding; + rule->bufsize += padding; + + rules->buf = realloc(rules->buf, rules->bufsize + rule_size); + if (!rules->buf) { + err(rules->udev, "realloc failed\n"); + goto exit; + } + dbg(rules->udev, "adding rule to offset %zi\n", rules->bufsize); + memcpy(rules->buf + rules->bufsize, rule, rule_size); + rules->bufsize += rule_size; +exit: + return 0; + +invalid: + err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno); + return -1; +} + +static int parse_file(struct udev_rules *rules, const char *filename) +{ + char line[UTIL_LINE_SIZE]; + char *bufline; + unsigned int lineno; + char *buf; + size_t bufsize; + size_t cur; + size_t count; + int retval = 0; + size_t start; + struct udev_rule *rule; + struct udev_rules_iter iter; + + start = rules->bufsize; + + if (file_map(filename, &buf, &bufsize) != 0) { + err(rules->udev, "can't open '%s' as rules file: %m\n", filename); + return -1; + } + info(rules->udev, "reading '%s' as rules file\n", filename); + + /* loop through the whole file */ + cur = 0; + lineno = 0; + while (cur < bufsize) { + unsigned int i, j; + + count = buf_get_line(buf, bufsize, cur); + bufline = &buf[cur]; + cur += count+1; + lineno++; + + /* eat the whitespace */ + while ((count > 0) && isspace(bufline[0])) { + bufline++; + count--; + } + if (count == 0) + continue; + + /* see if this is a comment */ + if (bufline[0] == '#') + continue; + + if (count >= sizeof(line)) { + err(rules->udev, "line too long, rule skipped '%s:%u'\n", 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++] = bufline[i]; + } + line[j] = '\0'; + + dbg(rules->udev, "read '%s'\n", line); + add_to_rules(rules, line, filename, lineno); + } + + /* Compute all goto targets within this file */ + udev_rules_iter_init(&iter, rules); + udev_rules_iter_goto(&iter, start); + while((rule = udev_rules_iter_next(&iter))) { + if (rule->goto_label.operation != KEY_OP_UNSET) { + char *goto_label = &rule->buf[rule->goto_label.val_off]; + + dbg(rules->udev, "resolving goto label '%s'\n", goto_label); + rule->goto_rule_off = find_label(&iter, goto_label); + if (rule->goto_rule_off == 0) { + err(rules->udev, "ignore goto to nonexistent label '%s' in '%s'\n", + goto_label, filename); + rule->goto_rule_off = iter.current; + } + } + } + + file_unmap(buf, bufsize); + return retval; +} + +int udev_rules_init(struct udev *udev, struct udev_rules *rules, int resolve_names) +{ + struct stat statbuf; + char filename[PATH_MAX]; + LIST_HEAD(name_list); + LIST_HEAD(sort_list); + struct name_entry *name_loop, *name_tmp; + struct name_entry *sort_loop, *sort_tmp; + int retval = 0; + + memset(rules, 0x00, sizeof(struct udev_rules)); + rules->udev = udev; + rules->resolve_names = resolve_names; + + if (udev_get_rules_path(udev) != NULL) { + /* custom rules location for testing */ + add_matching_files(udev, &name_list, udev_get_rules_path(udev), ".rules"); + } else { + /* read user/custom rules */ + add_matching_files(udev, &name_list, SYSCONFDIR "/udev/rules.d", ".rules"); + + /* read dynamic/temporary rules */ + util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename)); + util_strlcat(filename, "/.udev/rules.d", sizeof(filename)); + if (stat(filename, &statbuf) != 0) { + create_path(udev, filename); + udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755); + mkdir(filename, 0755); + udev_selinux_resetfscreatecon(udev); + } + add_matching_files(udev, &sort_list, filename, ".rules"); + + /* read default rules */ + add_matching_files(udev, &sort_list, UDEV_PREFIX "/lib/udev/rules.d", ".rules"); + + /* sort all rules files by basename into list of files */ + list_for_each_entry_safe(sort_loop, sort_tmp, &sort_list, node) { + const char *sort_base = strrchr(sort_loop->name, '/'); + + if (sort_base == NULL) + continue; + + list_for_each_entry_safe(name_loop, name_tmp, &name_list, node) { + const char *name_base = strrchr(name_loop->name, '/'); + + if (name_base == NULL) + continue; + + if (strcmp(name_base, sort_base) == 0) { + info(udev, "rule file '%s' already added, ignoring '%s'\n", + name_loop->name, sort_loop->name); + list_del(&sort_loop->node); + free(sort_loop); + sort_loop = NULL; + continue; + } + + if (strcmp(name_base, sort_base) > 0) + break; + } + if (sort_loop != NULL) + list_move_tail(&sort_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(udev, "empty rules file '%s'\n", name_loop->name); + } else + err(udev, "could not read '%s': %m\n", name_loop->name); + list_del(&name_loop->node); + free(name_loop); + } + + return retval; +} + +void udev_rules_cleanup(struct udev_rules *rules) +{ + if (rules->buf) { + free(rules->buf); + rules->buf = NULL; + } +} + |