diff options
| -rw-r--r-- | udev/Makefile.am | 2 | ||||
| -rw-r--r-- | udev/test-udev.c | 1 | ||||
| -rw-r--r-- | udev/udev-event.c | 1 | ||||
| -rw-r--r-- | udev/udev-node.c | 1 | ||||
| -rw-r--r-- | udev/udev-rules-parse.c | 876 | ||||
| -rw-r--r-- | udev/udev-rules.c | 937 | ||||
| -rw-r--r-- | udev/udev-rules.h | 134 | ||||
| -rw-r--r-- | udev/udev.h | 21 | ||||
| -rw-r--r-- | udev/udevadm-test.c | 1 | ||||
| -rw-r--r-- | udev/udevd.c | 1 |
10 files changed, 950 insertions, 1025 deletions
diff --git a/udev/Makefile.am b/udev/Makefile.am index fc97aad044..c374942c6e 100644 --- a/udev/Makefile.am +++ b/udev/Makefile.am @@ -14,12 +14,10 @@ common_ldadd = common_files = \ udev.h \ - udev-rules.h \ udev-sysdeps.h \ udev-event.c \ udev-node.c \ udev-rules.c \ - udev-rules-parse.c \ udev-util.c \ lib/libudev.h \ lib/libudev-private.h \ diff --git a/udev/test-udev.c b/udev/test-udev.c index 43c97aeb34..1caccce304 100644 --- a/udev/test-udev.c +++ b/udev/test-udev.c @@ -29,7 +29,6 @@ #include <grp.h> #include "udev.h" -#include "udev-rules.h" static void asmlinkage sig_handler(int signum) { diff --git a/udev/udev-event.c b/udev/udev-event.c index 24f7c55bbc..07c02211a0 100644 --- a/udev/udev-event.c +++ b/udev/udev-event.c @@ -29,7 +29,6 @@ #include <linux/sockios.h> #include "udev.h" -#include "udev-rules.h" struct udev_event *udev_event_new(struct udev_device *dev) { diff --git a/udev/udev-node.c b/udev/udev-node.c index 73075ee0aa..62786d417b 100644 --- a/udev/udev-node.c +++ b/udev/udev-node.c @@ -28,7 +28,6 @@ #include <sys/types.h> #include "udev.h" -#include "udev-rules.h" #define TMP_FILE_EXT ".udev-tmp" diff --git a/udev/udev-rules-parse.c b/udev/udev-rules-parse.c deleted file mode 100644 index 16bb91573a..0000000000 --- a/udev/udev-rules-parse.c +++ /dev/null @@ -1,876 +0,0 @@ -/* - * 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 <dirent.h> -#include <errno.h> -#include <sys/stat.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, "match:\n"); - } else if (linepos[0] == '!' && linepos[1] == '=') { - *operation = KEY_OP_NOMATCH; - linepos += 2; - dbg(rules->udev, "nomatch:\n"); - } else if (linepos[0] == '+' && linepos[1] == '=') { - *operation = KEY_OP_ADD; - linepos += 2; - dbg(rules->udev, "add:\n"); - } else if (linepos[0] == '=') { - *operation = KEY_OP_ASSIGN; - linepos++; - dbg(rules->udev, "assign:\n"); - } else if (linepos[0] == ':' && linepos[1] == '=') { - *operation = KEY_OP_ASSIGN_FINAL; - linepos += 2; - dbg(rules->udev, "assign_final:\n"); - } else - return -1; - - /* terminate key */ - temp[0] = '\0'; - - /* 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, "'%s'-'%s'\n", *key, *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) -{ - FILE *f; - char line[UTIL_LINE_SIZE]; - size_t start; - struct udev_rule *rule; - struct udev_rules_iter iter; - - start = rules->bufsize; - info(rules->udev, "reading '%s' as rules file\n", filename); - - f = fopen(filename, "r"); - if (f == NULL) - return -1; - - while(fgets(line, sizeof(line), f) != NULL) { - int line_nr = 0; - char *key; - size_t len; - - /* skip whitespace */ - line_nr++; - key = line; - while (isspace(key[0])) - key++; - - /* comment */ - if (key[0] == '#') - continue; - - len = strlen(line); - if (len < 3) - continue; - - /* continue reading if backslash+newline is found */ - while (line[len-2] == '\\') { - if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL) - break; - line_nr++; - len = strlen(line); - } - - if (len+1 >= sizeof(line)) { - err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr); - continue; - } - add_to_rules(rules, key, filename, line_nr); - } - fclose(f); - - /* 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; - } - } - } - return 0; -} - -static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix) -{ - struct dirent *ent; - DIR *dir; - char filename[UTIL_PATH_SIZE]; - - dbg(udev, "open directory '%s'\n", dirname); - dir = opendir(dirname); - if (dir == NULL) { - err(udev, "unable to open '%s': %m\n", dirname); - return -1; - } - - while (1) { - ent = readdir(dir); - if (ent == NULL || ent->d_name[0] == '\0') - break; - - if ((ent->d_name[0] == '.') || (ent->d_name[0] == '#')) - continue; - - /* look for file matching with specified suffix */ - if (suffix != NULL) { - const char *ext; - - ext = strrchr(ent->d_name, '.'); - if (ext == NULL) - continue; - if (strcmp(ext, suffix) != 0) - continue; - } - dbg(udev, "put file '%s/%s' into list\n", dirname, ent->d_name); - - snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name); - filename[sizeof(filename)-1] = '\0'; - udev_list_entry_add(udev, file_list, filename, NULL, 1, 1); - } - - closedir(dir); - return 0; -} - -int udev_rules_init(struct udev *udev, struct udev_rules *rules, int resolve_names) -{ - struct stat statbuf; - char filename[PATH_MAX]; - struct udev_list_node file_list; - struct udev_list_entry *file_loop, *file_tmp; - int retval = 0; - - memset(rules, 0x00, sizeof(struct udev_rules)); - rules->udev = udev; - rules->resolve_names = resolve_names; - udev_list_init(&file_list); - - if (udev_get_rules_path(udev) != NULL) { - /* custom rules location for testing */ - add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules"); - } else { - struct udev_list_node sort_list; - struct udev_list_entry *sort_loop, *sort_tmp; - - /* read user/custom rules */ - add_matching_files(udev, &file_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); - } - udev_list_init(&sort_list); - 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 */ - udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) { - const char *sort_name = udev_list_entry_get_name(sort_loop); - const char *sort_base = strrchr(sort_name, '/'); - - if (sort_base == NULL) - continue; - - udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) { - const char *file_name = udev_list_entry_get_name(file_loop); - const char *file_base = strrchr(file_name, '/'); - - if (file_base == NULL) - continue; - if (strcmp(file_base, sort_base) == 0) { - info(udev, "rule file basename '%s' already added, ignoring '%s'\n", - file_name, sort_name); - udev_list_entry_remove(sort_loop); - sort_loop = NULL; - break; - } - if (strcmp(file_base, sort_base) > 0) - break; - } - if (sort_loop != NULL) - udev_list_entry_move_before(sort_loop, file_loop); - } - } - - /* parse list of files */ - udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) { - const char *file_name = udev_list_entry_get_name(file_loop); - - if (stat(file_name, &statbuf) == 0 && statbuf.st_size > 0) - parse_file(rules, file_name); - else - info(udev, "can not read '%s'\n", file_name); - udev_list_entry_remove(file_loop); - } - return retval; -} - -void udev_rules_cleanup(struct udev_rules *rules) -{ - if (rules->buf) { - free(rules->buf); - rules->buf = NULL; - } -} - diff --git a/udev/udev-rules.c b/udev/udev-rules.c index 00435d4af7..445eec4239 100644 --- a/udev/udev-rules.c +++ b/udev/udev-rules.c @@ -33,9 +33,161 @@ #include <sys/stat.h> #include "udev.h" -#include "udev-rules.h" -extern char **environ; +#define PAIRS_MAX 5 + +enum key_operation { + KEY_OP_UNSET, + KEY_OP_MATCH, + KEY_OP_NOMATCH, + KEY_OP_ADD, + KEY_OP_ASSIGN, + KEY_OP_ASSIGN_FINAL, +}; + +struct key { + enum key_operation operation; + size_t val_off; +}; + +struct key_pair { + struct key key; + size_t key_name_off; +}; + +struct key_pairs { + int count; + struct key_pair keys[PAIRS_MAX]; +}; + +enum import_type { + IMPORT_UNSET, + IMPORT_PROGRAM, + IMPORT_FILE, + IMPORT_PARENT, +}; + +enum escape_type { + ESCAPE_UNSET, + ESCAPE_NONE, + ESCAPE_REPLACE, +}; + +struct udev_rule { + struct key action; + struct key devpath; + struct key kernel; + struct key subsystem; + struct key driver; + struct key_pairs attr; + + struct key kernels; + struct key subsystems; + struct key drivers; + struct key_pairs attrs; + + struct key_pairs env; + struct key program; + struct key result; + struct key import; + enum import_type import_type; + struct key test; + mode_t test_mode_mask; + struct key run; + struct key wait_for; + struct key label; + struct key goto_label; + size_t goto_rule_off; + + struct key name; + struct key symlink; + struct key symlink_match; + struct key owner; + struct key group; + struct key mode; + enum escape_type string_escape; + + unsigned int link_priority; + int event_timeout; + unsigned int partitions; + unsigned int last_rule:1, + run_ignore_error:1, + ignore_device:1, + ignore_remove:1; + + size_t bufsize; + char buf[]; +}; + +struct udev_rules_iter { + struct udev_rules *rules; + size_t current; +}; + +static 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; +} + +static 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; +} + +static 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; +} /* extract possible {attr} and move str behind it */ static char *get_format_attribute(struct udev *udev, char **str) @@ -1247,7 +1399,7 @@ try_parent: if (match_key(event->udev, "RESULT", rule, &rule->result, event->program_result)) goto nomatch; - /* import variables returned from program or or file into environment */ + /* import variables returned from program or or file into properties */ if (rule->import.operation != KEY_OP_UNSET) { char import[UTIL_PATH_SIZE]; int rc = -1; @@ -1618,3 +1770,782 @@ int udev_rules_get_run(struct udev_rules *rules, struct udev_event *event) return 0; } + +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, "match:\n"); + } else if (linepos[0] == '!' && linepos[1] == '=') { + *operation = KEY_OP_NOMATCH; + linepos += 2; + dbg(rules->udev, "nomatch:\n"); + } else if (linepos[0] == '+' && linepos[1] == '=') { + *operation = KEY_OP_ADD; + linepos += 2; + dbg(rules->udev, "add:\n"); + } else if (linepos[0] == '=') { + *operation = KEY_OP_ASSIGN; + linepos++; + dbg(rules->udev, "assign:\n"); + } else if (linepos[0] == ':' && linepos[1] == '=') { + *operation = KEY_OP_ASSIGN_FINAL; + linepos += 2; + dbg(rules->udev, "assign_final:\n"); + } else + return -1; + + /* terminate key */ + temp[0] = '\0'; + + /* 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, "'%s'-'%s'\n", *key, *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 may not be available in a future kernel, " + "please fix it in %s:%u", filename, lineno); + else if (strstr(attr, "../") != NULL) + err(rules->udev, "do not reference parent sysfs directories directly, " + "it may break with a future kernel, 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_FAKE_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_FAKE_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) +{ + FILE *f; + char line[UTIL_LINE_SIZE]; + size_t start; + struct udev_rule *rule; + struct udev_rules_iter iter; + + start = rules->bufsize; + info(rules->udev, "reading '%s' as rules file\n", filename); + + f = fopen(filename, "r"); + if (f == NULL) + return -1; + + while(fgets(line, sizeof(line), f) != NULL) { + int line_nr = 0; + char *key; + size_t len; + + /* skip whitespace */ + line_nr++; + key = line; + while (isspace(key[0])) + key++; + + /* comment */ + if (key[0] == '#') + continue; + + len = strlen(line); + if (len < 3) + continue; + + /* continue reading if backslash+newline is found */ + while (line[len-2] == '\\') { + if (fgets(&line[len-2], (sizeof(line)-len)+2, f) == NULL) + break; + line_nr++; + len = strlen(line); + } + + if (len+1 >= sizeof(line)) { + err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr); + continue; + } + add_to_rules(rules, key, filename, line_nr); + } + fclose(f); + + /* 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; + } + } + } + return 0; +} + +static int add_matching_files(struct udev *udev, struct udev_list_node *file_list, const char *dirname, const char *suffix) +{ + struct dirent *ent; + DIR *dir; + char filename[UTIL_PATH_SIZE]; + + dbg(udev, "open directory '%s'\n", dirname); + dir = opendir(dirname); + if (dir == NULL) { + err(udev, "unable to open '%s': %m\n", dirname); + return -1; + } + + while (1) { + ent = readdir(dir); + if (ent == NULL || ent->d_name[0] == '\0') + break; + + if ((ent->d_name[0] == '.') || (ent->d_name[0] == '#')) + continue; + + /* look for file matching with specified suffix */ + if (suffix != NULL) { + const char *ext; + + ext = strrchr(ent->d_name, '.'); + if (ext == NULL) + continue; + if (strcmp(ext, suffix) != 0) + continue; + } + dbg(udev, "put file '%s/%s' into list\n", dirname, ent->d_name); + + snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name); + filename[sizeof(filename)-1] = '\0'; + udev_list_entry_add(udev, file_list, filename, NULL, 1, 1); + } + + closedir(dir); + return 0; +} + +int udev_rules_init(struct udev *udev, struct udev_rules *rules, int resolve_names) +{ + struct stat statbuf; + char filename[PATH_MAX]; + struct udev_list_node file_list; + struct udev_list_entry *file_loop, *file_tmp; + int retval = 0; + + memset(rules, 0x00, sizeof(struct udev_rules)); + rules->udev = udev; + rules->resolve_names = resolve_names; + udev_list_init(&file_list); + + if (udev_get_rules_path(udev) != NULL) { + /* custom rules location for testing */ + add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules"); + } else { + struct udev_list_node sort_list; + struct udev_list_entry *sort_loop, *sort_tmp; + + /* read user/custom rules */ + add_matching_files(udev, &file_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); + } + udev_list_init(&sort_list); + 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 */ + udev_list_entry_foreach_safe(sort_loop, sort_tmp, udev_list_get_entry(&sort_list)) { + const char *sort_name = udev_list_entry_get_name(sort_loop); + const char *sort_base = strrchr(sort_name, '/'); + + if (sort_base == NULL) + continue; + + udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) { + const char *file_name = udev_list_entry_get_name(file_loop); + const char *file_base = strrchr(file_name, '/'); + + if (file_base == NULL) + continue; + if (strcmp(file_base, sort_base) == 0) { + info(udev, "rule file basename '%s' already added, ignoring '%s'\n", + file_name, sort_name); + udev_list_entry_remove(sort_loop); + sort_loop = NULL; + break; + } + if (strcmp(file_base, sort_base) > 0) + break; + } + if (sort_loop != NULL) + udev_list_entry_move_before(sort_loop, file_loop); + } + } + + /* parse list of files */ + udev_list_entry_foreach_safe(file_loop, file_tmp, udev_list_get_entry(&file_list)) { + const char *file_name = udev_list_entry_get_name(file_loop); + + if (stat(file_name, &statbuf) == 0 && statbuf.st_size > 0) + parse_file(rules, file_name); + else + info(udev, "can not read '%s'\n", file_name); + udev_list_entry_remove(file_loop); + } + return retval; +} + +void udev_rules_cleanup(struct udev_rules *rules) +{ + if (rules->buf) { + free(rules->buf); + rules->buf = NULL; + } +} diff --git a/udev/udev-rules.h b/udev/udev-rules.h deleted file mode 100644 index d8f2f367c9..0000000000 --- a/udev/udev-rules.h +++ /dev/null @@ -1,134 +0,0 @@ -/* - * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com> - * Copyright (C) 2004-2008 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/>. - */ - -#ifndef UDEV_RULES_H -#define UDEV_RULES_H - -#include "udev.h" - -#define PAIRS_MAX 5 - -enum key_operation { - KEY_OP_UNSET, - KEY_OP_MATCH, - KEY_OP_NOMATCH, - KEY_OP_ADD, - KEY_OP_ASSIGN, - KEY_OP_ASSIGN_FINAL, -}; - -struct key { - enum key_operation operation; - size_t val_off; -}; - -struct key_pair { - struct key key; - size_t key_name_off; -}; - -struct key_pairs { - int count; - struct key_pair keys[PAIRS_MAX]; -}; - -enum import_type { - IMPORT_UNSET, - IMPORT_PROGRAM, - IMPORT_FILE, - IMPORT_PARENT, -}; - -enum escape_type { - ESCAPE_UNSET, - ESCAPE_NONE, - ESCAPE_REPLACE, -}; - -struct udev_rule { - struct key action; - struct key devpath; - struct key kernel; - struct key subsystem; - struct key driver; - struct key_pairs attr; - - struct key kernels; - struct key subsystems; - struct key drivers; - struct key_pairs attrs; - - struct key_pairs env; - struct key program; - struct key result; - struct key import; - enum import_type import_type; - struct key test; - mode_t test_mode_mask; - struct key run; - struct key wait_for; - struct key label; - struct key goto_label; - size_t goto_rule_off; - - struct key name; - struct key symlink; - struct key symlink_match; - struct key owner; - struct key group; - struct key mode; - enum escape_type string_escape; - - unsigned int link_priority; - int event_timeout; - unsigned int partitions; - unsigned int last_rule:1, - run_ignore_error:1, - ignore_device:1, - ignore_remove:1; - - size_t bufsize; - char buf[]; -}; - -struct udev_rules { - struct udev *udev; - char *buf; - size_t bufsize; - int resolve_names; -}; - -struct udev_rules_iter { - struct udev_rules *rules; - size_t current; -}; - -extern int udev_rules_init(struct udev *udev, struct udev_rules *rules, int resolve_names); -extern void udev_rules_cleanup(struct udev_rules *rules); - -extern void udev_rules_iter_init(struct udev_rules_iter *iter, struct udev_rules *rules); -extern struct udev_rule *udev_rules_iter_next(struct udev_rules_iter *iter); -extern struct udev_rule *udev_rules_iter_goto(struct udev_rules_iter *iter, size_t rule_off); - -extern int udev_rules_get_name(struct udev_rules *rules, struct udev_event *event); -extern int udev_rules_get_run(struct udev_rules *rules, struct udev_event *event); -extern int udev_rules_run(struct udev_event *event); - -extern void udev_rules_apply_format(struct udev_event *event, char *string, size_t maxsize); - -#endif diff --git a/udev/udev.h b/udev/udev.h index 5030972d9b..0e8a8697bd 100644 --- a/udev/udev.h +++ b/udev/udev.h @@ -30,7 +30,7 @@ #define ALLOWED_CHARS_FILE ALLOWED_CHARS "/" #define ALLOWED_CHARS_INPUT ALLOWED_CHARS_FILE " $%?," -#define DEFAULT_PARTITIONS_COUNT 15 +#define DEFAULT_FAKE_PARTITIONS_COUNT 15 #define UDEV_EVENT_TIMEOUT 180 /* linux/include/linux/kobject.h */ @@ -40,13 +40,9 @@ #define UDEV_CTRL_SOCK_PATH "@" UDEV_PREFIX "/org/kernel/udev/udevd" #define UDEV_MAX(a,b) ((a) > (b) ? (a) : (b)) - -/* pipes */ #define READ_END 0 #define WRITE_END 1 -struct udev_rules; - static inline void logging_init(const char *program_name) { openlog(program_name, LOG_PID | LOG_CONS, LOG_DAEMON); @@ -90,10 +86,25 @@ struct udev_event { int exitstatus; time_t queue_time; }; +struct udev_rules; extern struct udev_event *udev_event_new(struct udev_device *dev); extern void udev_event_unref(struct udev_event *event); extern int udev_event_run(struct udev_event *event, struct udev_rules *rules); +/* udev-rules.c */ +struct udev_rules { + struct udev *udev; + char *buf; + size_t bufsize; + int resolve_names; +}; +extern int udev_rules_init(struct udev *udev, struct udev_rules *rules, int resolve_names); +extern void udev_rules_cleanup(struct udev_rules *rules); +extern int udev_rules_get_name(struct udev_rules *rules, struct udev_event *event); +extern int udev_rules_get_run(struct udev_rules *rules, struct udev_event *event); +extern int udev_rules_run(struct udev_event *event); +extern void udev_rules_apply_format(struct udev_event *event, char *string, size_t maxsize); + /* udev-node.c */ extern int udev_node_mknod(struct udev_device *dev, const char *file, dev_t devnum, mode_t mode, uid_t uid, gid_t gid); extern int udev_node_add(struct udev_device *dev, mode_t mode, const char *owner, const char *group, int test); diff --git a/udev/udevadm-test.c b/udev/udevadm-test.c index 090c524190..99f6c36dde 100644 --- a/udev/udevadm-test.c +++ b/udev/udevadm-test.c @@ -29,7 +29,6 @@ #include <getopt.h> #include "udev.h" -#include "udev-rules.h" int udevadm_test(struct udev *udev, int argc, char *argv[]) { diff --git a/udev/udevd.c b/udev/udevd.c index 576f9e8233..5388961c42 100644 --- a/udev/udevd.c +++ b/udev/udevd.c @@ -36,7 +36,6 @@ #endif #include "udev.h" -#include "udev-rules.h" #define UDEVD_PRIORITY -4 #define UDEV_PRIORITY -2 |