+++ /dev/null
-/*
- * Copyright (C) 2003-2012 Kay Sievers <kay@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 <limits.h>
-#include <stdlib.h>
-#include <stdbool.h>
-#include <string.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <ctype.h>
-#include <unistd.h>
-#include <errno.h>
-#include <dirent.h>
-#include <fnmatch.h>
-#include <time.h>
-
-#include "udev.h"
-#include "path-util.h"
-#include "conf-files.h"
-#include "strbuf.h"
-#include "strv.h"
-#include "util.h"
-#include "sysctl-util.h"
-
-#define PREALLOC_TOKEN 2048
-
-struct uid_gid {
- unsigned int name_off;
- union {
- uid_t uid;
- gid_t gid;
- };
-};
-
-static const char* const rules_dirs[] = {
- "/etc/udev/rules.d",
- "/run/udev/rules.d",
- UDEVLIBEXECDIR "/rules.d",
- NULL};
-
-struct udev_rules {
- struct udev *udev;
- usec_t dirs_ts_usec;
- int resolve_names;
-
- /* every key in the rules file becomes a token */
- struct token *tokens;
- unsigned int token_cur;
- unsigned int token_max;
-
- /* all key strings are copied and de-duplicated in a single continuous string buffer */
- struct strbuf *strbuf;
-
- /* during rule parsing, uid/gid lookup results are cached */
- struct uid_gid *uids;
- unsigned int uids_cur;
- unsigned int uids_max;
- struct uid_gid *gids;
- unsigned int gids_cur;
- unsigned int gids_max;
-};
-
-static char *rules_str(struct udev_rules *rules, unsigned int off) {
- return rules->strbuf->buf + off;
-}
-
-static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
- return strbuf_add_string(rules->strbuf, s, strlen(s));
-}
-
-/* KEY=="", KEY!="", KEY+="", KEY-="", KEY="", KEY:="" */
-enum operation_type {
- OP_UNSET,
-
- OP_MATCH,
- OP_NOMATCH,
- OP_MATCH_MAX,
-
- OP_ADD,
- OP_REMOVE,
- OP_ASSIGN,
- OP_ASSIGN_FINAL,
-};
-
-enum string_glob_type {
- GL_UNSET,
- GL_PLAIN, /* no special chars */
- GL_GLOB, /* shell globs ?,*,[] */
- GL_SPLIT, /* multi-value A|B */
- GL_SPLIT_GLOB, /* multi-value with glob A*|B* */
- GL_SOMETHING, /* commonly used "?*" */
-};
-
-enum string_subst_type {
- SB_UNSET,
- SB_NONE,
- SB_FORMAT,
- SB_SUBSYS,
-};
-
-/* tokens of a rule are sorted/handled in this order */
-enum token_type {
- TK_UNSET,
- TK_RULE,
-
- TK_M_ACTION, /* val */
- TK_M_DEVPATH, /* val */
- TK_M_KERNEL, /* val */
- TK_M_DEVLINK, /* val */
- TK_M_NAME, /* val */
- TK_M_ENV, /* val, attr */
- TK_M_TAG, /* val */
- TK_M_SUBSYSTEM, /* val */
- TK_M_DRIVER, /* val */
- TK_M_WAITFOR, /* val */
- TK_M_ATTR, /* val, attr */
- TK_M_SYSCTL, /* val, attr */
-
- TK_M_PARENTS_MIN,
- TK_M_KERNELS, /* val */
- TK_M_SUBSYSTEMS, /* val */
- TK_M_DRIVERS, /* val */
- TK_M_ATTRS, /* val, attr */
- TK_M_TAGS, /* val */
- TK_M_PARENTS_MAX,
-
- TK_M_TEST, /* val, mode_t */
- TK_M_PROGRAM, /* val */
- TK_M_IMPORT_FILE, /* val */
- TK_M_IMPORT_PROG, /* val */
- TK_M_IMPORT_BUILTIN, /* val */
- TK_M_IMPORT_DB, /* val */
- TK_M_IMPORT_CMDLINE, /* val */
- TK_M_IMPORT_PARENT, /* val */
- TK_M_RESULT, /* val */
- TK_M_MAX,
-
- TK_A_STRING_ESCAPE_NONE,
- TK_A_STRING_ESCAPE_REPLACE,
- TK_A_DB_PERSIST,
- TK_A_INOTIFY_WATCH, /* int */
- TK_A_DEVLINK_PRIO, /* int */
- TK_A_OWNER, /* val */
- TK_A_GROUP, /* val */
- TK_A_MODE, /* val */
- TK_A_OWNER_ID, /* uid_t */
- TK_A_GROUP_ID, /* gid_t */
- TK_A_MODE_ID, /* mode_t */
- TK_A_TAG, /* val */
- TK_A_STATIC_NODE, /* val */
- TK_A_SECLABEL, /* val, attr */
- TK_A_ENV, /* val, attr */
- TK_A_NAME, /* val */
- TK_A_DEVLINK, /* val */
- TK_A_ATTR, /* val, attr */
- TK_A_SYSCTL, /* val, attr */
- TK_A_RUN_BUILTIN, /* val, bool */
- TK_A_RUN_PROGRAM, /* val, bool */
- TK_A_GOTO, /* size_t */
-
- TK_END,
-};
-
-/* we try to pack stuff in a way that we take only 12 bytes per token */
-struct token {
- union {
- unsigned char type; /* same in rule and key */
- struct {
- enum token_type type:8;
- bool can_set_name:1;
- bool has_static_node:1;
- unsigned int unused:6;
- unsigned short token_count;
- unsigned int label_off;
- unsigned short filename_off;
- unsigned short filename_line;
- } rule;
- struct {
- enum token_type type:8;
- enum operation_type op:8;
- enum string_glob_type glob:8;
- enum string_subst_type subst:4;
- enum string_subst_type attrsubst:4;
- unsigned int value_off;
- union {
- unsigned int attr_off;
- unsigned int rule_goto;
- mode_t mode;
- uid_t uid;
- gid_t gid;
- int devlink_prio;
- int watch;
- enum udev_builtin_cmd builtin_cmd;
- };
- } key;
- };
-};
-
-#define MAX_TK 64
-struct rule_tmp {
- struct udev_rules *rules;
- struct token rule;
- struct token token[MAX_TK];
- unsigned int token_cur;
-};
-
-#ifdef DEBUG
-static const char *operation_str(enum operation_type type) {
- static const char *operation_strs[] = {
- [OP_UNSET] = "UNSET",
- [OP_MATCH] = "match",
- [OP_NOMATCH] = "nomatch",
- [OP_MATCH_MAX] = "MATCH_MAX",
-
- [OP_ADD] = "add",
- [OP_REMOVE] = "remove",
- [OP_ASSIGN] = "assign",
- [OP_ASSIGN_FINAL] = "assign-final",
-} ;
-
- return operation_strs[type];
-}
-
-static const char *string_glob_str(enum string_glob_type type) {
- static const char *string_glob_strs[] = {
- [GL_UNSET] = "UNSET",
- [GL_PLAIN] = "plain",
- [GL_GLOB] = "glob",
- [GL_SPLIT] = "split",
- [GL_SPLIT_GLOB] = "split-glob",
- [GL_SOMETHING] = "split-glob",
- };
-
- return string_glob_strs[type];
-}
-
-static const char *token_str(enum token_type type) {
- static const char *token_strs[] = {
- [TK_UNSET] = "UNSET",
- [TK_RULE] = "RULE",
-
- [TK_M_ACTION] = "M ACTION",
- [TK_M_DEVPATH] = "M DEVPATH",
- [TK_M_KERNEL] = "M KERNEL",
- [TK_M_DEVLINK] = "M DEVLINK",
- [TK_M_NAME] = "M NAME",
- [TK_M_ENV] = "M ENV",
- [TK_M_TAG] = "M TAG",
- [TK_M_SUBSYSTEM] = "M SUBSYSTEM",
- [TK_M_DRIVER] = "M DRIVER",
- [TK_M_WAITFOR] = "M WAITFOR",
- [TK_M_ATTR] = "M ATTR",
- [TK_M_SYSCTL] = "M SYSCTL",
-
- [TK_M_PARENTS_MIN] = "M PARENTS_MIN",
- [TK_M_KERNELS] = "M KERNELS",
- [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS",
- [TK_M_DRIVERS] = "M DRIVERS",
- [TK_M_ATTRS] = "M ATTRS",
- [TK_M_TAGS] = "M TAGS",
- [TK_M_PARENTS_MAX] = "M PARENTS_MAX",
-
- [TK_M_TEST] = "M TEST",
- [TK_M_PROGRAM] = "M PROGRAM",
- [TK_M_IMPORT_FILE] = "M IMPORT_FILE",
- [TK_M_IMPORT_PROG] = "M IMPORT_PROG",
- [TK_M_IMPORT_BUILTIN] = "M IMPORT_BUILTIN",
- [TK_M_IMPORT_DB] = "M IMPORT_DB",
- [TK_M_IMPORT_CMDLINE] = "M IMPORT_CMDLINE",
- [TK_M_IMPORT_PARENT] = "M IMPORT_PARENT",
- [TK_M_RESULT] = "M RESULT",
- [TK_M_MAX] = "M MAX",
-
- [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE",
- [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE",
- [TK_A_DB_PERSIST] = "A DB_PERSIST",
- [TK_A_INOTIFY_WATCH] = "A INOTIFY_WATCH",
- [TK_A_DEVLINK_PRIO] = "A DEVLINK_PRIO",
- [TK_A_OWNER] = "A OWNER",
- [TK_A_GROUP] = "A GROUP",
- [TK_A_MODE] = "A MODE",
- [TK_A_OWNER_ID] = "A OWNER_ID",
- [TK_A_GROUP_ID] = "A GROUP_ID",
- [TK_A_STATIC_NODE] = "A STATIC_NODE",
- [TK_A_SECLABEL] = "A SECLABEL",
- [TK_A_MODE_ID] = "A MODE_ID",
- [TK_A_ENV] = "A ENV",
- [TK_A_TAG] = "A ENV",
- [TK_A_NAME] = "A NAME",
- [TK_A_DEVLINK] = "A DEVLINK",
- [TK_A_ATTR] = "A ATTR",
- [TK_A_SYSCTL] = "A SYSCTL",
- [TK_A_RUN_BUILTIN] = "A RUN_BUILTIN",
- [TK_A_RUN_PROGRAM] = "A RUN_PROGRAM",
- [TK_A_GOTO] = "A GOTO",
-
- [TK_END] = "END",
- };
-
- return token_strs[type];
-}
-
-static void dump_token(struct udev_rules *rules, struct token *token) {
- enum token_type type = token->type;
- enum operation_type op = token->key.op;
- enum string_glob_type glob = token->key.glob;
- const char *value = str(rules, token->key.value_off);
- const char *attr = &rules->buf[token->key.attr_off];
-
- switch (type) {
- case TK_RULE:
- {
- const char *tks_ptr = (char *)rules->tokens;
- const char *tk_ptr = (char *)token;
- unsigned int idx = (tk_ptr - tks_ptr) / sizeof(struct token);
-
- log_debug("* RULE %s:%u, token: %u, count: %u, label: '%s'",
- &rules->buf[token->rule.filename_off], token->rule.filename_line,
- idx, token->rule.token_count,
- &rules->buf[token->rule.label_off]);
- break;
- }
- case TK_M_ACTION:
- case TK_M_DEVPATH:
- case TK_M_KERNEL:
- case TK_M_SUBSYSTEM:
- case TK_M_DRIVER:
- case TK_M_WAITFOR:
- case TK_M_DEVLINK:
- case TK_M_NAME:
- case TK_M_KERNELS:
- case TK_M_SUBSYSTEMS:
- case TK_M_DRIVERS:
- case TK_M_TAGS:
- case TK_M_PROGRAM:
- case TK_M_IMPORT_FILE:
- case TK_M_IMPORT_PROG:
- case TK_M_IMPORT_DB:
- case TK_M_IMPORT_CMDLINE:
- case TK_M_IMPORT_PARENT:
- case TK_M_RESULT:
- case TK_A_NAME:
- case TK_A_DEVLINK:
- case TK_A_OWNER:
- case TK_A_GROUP:
- case TK_A_MODE:
- case TK_A_RUN_BUILTIN:
- case TK_A_RUN_PROGRAM:
- log_debug("%s %s '%s'(%s)",
- token_str(type), operation_str(op), value, string_glob_str(glob));
- break;
- case TK_M_IMPORT_BUILTIN:
- log_debug("%s %i '%s'", token_str(type), token->key.builtin_cmd, value);
- break;
- case TK_M_ATTR:
- case TK_M_SYSCTL:
- case TK_M_ATTRS:
- case TK_M_ENV:
- case TK_A_ATTR:
- case TK_A_SYSCTL:
- case TK_A_ENV:
- log_debug("%s %s '%s' '%s'(%s)",
- token_str(type), operation_str(op), attr, value, string_glob_str(glob));
- break;
- case TK_M_TAG:
- case TK_A_TAG:
- log_debug("%s %s '%s'", token_str(type), operation_str(op), value);
- break;
- case TK_A_STRING_ESCAPE_NONE:
- case TK_A_STRING_ESCAPE_REPLACE:
- case TK_A_DB_PERSIST:
- log_debug("%s", token_str(type));
- break;
- case TK_M_TEST:
- log_debug("%s %s '%s'(%s) %#o",
- token_str(type), operation_str(op), value, string_glob_str(glob), token->key.mode);
- break;
- case TK_A_INOTIFY_WATCH:
- log_debug("%s %u", token_str(type), token->key.watch);
- break;
- case TK_A_DEVLINK_PRIO:
- log_debug("%s %u", token_str(type), token->key.devlink_prio);
- break;
- case TK_A_OWNER_ID:
- log_debug("%s %s %u", token_str(type), operation_str(op), token->key.uid);
- break;
- case TK_A_GROUP_ID:
- log_debug("%s %s %u", token_str(type), operation_str(op), token->key.gid);
- break;
- case TK_A_MODE_ID:
- log_debug("%s %s %#o", token_str(type), operation_str(op), token->key.mode);
- break;
- case TK_A_STATIC_NODE:
- log_debug("%s '%s'", token_str(type), value);
- break;
- case TK_A_SECLABEL:
- log_debug("%s %s '%s' '%s'", token_str(type), operation_str(op), attr, value);
- break;
- case TK_A_GOTO:
- log_debug("%s '%s' %u", token_str(type), value, token->key.rule_goto);
- break;
- case TK_END:
- log_debug("* %s", token_str(type));
- break;
- case TK_M_PARENTS_MIN:
- case TK_M_PARENTS_MAX:
- case TK_M_MAX:
- case TK_UNSET:
- log_debug("unknown type %u", type);
- break;
- }
-}
-
-static void dump_rules(struct udev_rules *rules) {
- unsigned int i;
-
- log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings",
- rules->token_cur,
- rules->token_cur * sizeof(struct token),
- rules->buf_count,
- rules->buf_cur);
- for (i = 0; i < rules->token_cur; i++)
- dump_token(rules, &rules->tokens[i]);
-}
-#else
-static inline void dump_token(struct udev_rules *rules, struct token *token) {}
-static inline void dump_rules(struct udev_rules *rules) {}
-#endif /* DEBUG */
-
-static int add_token(struct udev_rules *rules, struct token *token) {
- /* grow buffer if needed */
- if (rules->token_cur+1 >= rules->token_max) {
- struct token *tokens;
- unsigned int add;
-
- /* double the buffer size */
- add = rules->token_max;
- if (add < 8)
- add = 8;
-
- tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token));
- if (tokens == NULL)
- return -1;
- rules->tokens = tokens;
- rules->token_max += add;
- }
- memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token));
- rules->token_cur++;
- return 0;
-}
-
-static uid_t add_uid(struct udev_rules *rules, const char *owner) {
- unsigned int i;
- uid_t uid = 0;
- unsigned int off;
- int r;
-
- /* lookup, if we know it already */
- for (i = 0; i < rules->uids_cur; i++) {
- off = rules->uids[i].name_off;
- if (streq(rules_str(rules, off), owner)) {
- uid = rules->uids[i].uid;
- return uid;
- }
- }
- r = get_user_creds(&owner, &uid, NULL, NULL, NULL);
- if (r < 0) {
- if (r == -ENOENT || r == -ESRCH)
- log_error("specified user '%s' unknown", owner);
- else
- log_error_errno(r, "error resolving user '%s': %m", owner);
- }
-
- /* grow buffer if needed */
- if (rules->uids_cur+1 >= rules->uids_max) {
- struct uid_gid *uids;
- unsigned int add;
-
- /* double the buffer size */
- add = rules->uids_max;
- if (add < 1)
- add = 8;
-
- uids = realloc(rules->uids, (rules->uids_max + add ) * sizeof(struct uid_gid));
- if (uids == NULL)
- return uid;
- rules->uids = uids;
- rules->uids_max += add;
- }
- rules->uids[rules->uids_cur].uid = uid;
- off = rules_add_string(rules, owner);
- if (off <= 0)
- return uid;
- rules->uids[rules->uids_cur].name_off = off;
- rules->uids_cur++;
- return uid;
-}
-
-static gid_t add_gid(struct udev_rules *rules, const char *group) {
- unsigned int i;
- gid_t gid = 0;
- unsigned int off;
- int r;
-
- /* lookup, if we know it already */
- for (i = 0; i < rules->gids_cur; i++) {
- off = rules->gids[i].name_off;
- if (streq(rules_str(rules, off), group)) {
- gid = rules->gids[i].gid;
- return gid;
- }
- }
- r = get_group_creds(&group, &gid);
- if (r < 0) {
- if (r == -ENOENT || r == -ESRCH)
- log_error("specified group '%s' unknown", group);
- else
- log_error_errno(r, "error resolving group '%s': %m", group);
- }
-
- /* grow buffer if needed */
- if (rules->gids_cur+1 >= rules->gids_max) {
- struct uid_gid *gids;
- unsigned int add;
-
- /* double the buffer size */
- add = rules->gids_max;
- if (add < 1)
- add = 8;
-
- gids = realloc(rules->gids, (rules->gids_max + add ) * sizeof(struct uid_gid));
- if (gids == NULL)
- return gid;
- rules->gids = gids;
- rules->gids_max += add;
- }
- rules->gids[rules->gids_cur].gid = gid;
- off = rules_add_string(rules, group);
- if (off <= 0)
- return gid;
- rules->gids[rules->gids_cur].name_off = off;
- rules->gids_cur++;
- return gid;
-}
-
-static int import_property_from_string(struct udev_device *dev, char *line) {
- char *key;
- char *val;
- size_t len;
-
- /* find key */
- key = line;
- while (isspace(key[0]))
- key++;
-
- /* comment or empty line */
- if (key[0] == '#' || key[0] == '\0')
- return -1;
-
- /* split key/value */
- val = strchr(key, '=');
- if (val == NULL)
- return -1;
- val[0] = '\0';
- val++;
-
- /* find value */
- while (isspace(val[0]))
- val++;
-
- /* terminate key */
- len = strlen(key);
- if (len == 0)
- return -1;
- while (isspace(key[len-1]))
- len--;
- key[len] = '\0';
-
- /* terminate value */
- len = strlen(val);
- if (len == 0)
- return -1;
- while (isspace(val[len-1]))
- len--;
- val[len] = '\0';
-
- if (len == 0)
- return -1;
-
- /* unquote */
- if (val[0] == '"' || val[0] == '\'') {
- if (val[len-1] != val[0]) {
- log_debug("inconsistent quoting: '%s', skip", line);
- return -1;
- }
- val[len-1] = '\0';
- val++;
- }
-
- udev_device_add_property(dev, key, val);
-
- return 0;
-}
-
-static int import_file_into_properties(struct udev_device *dev, const char *filename) {
- FILE *f;
- char line[UTIL_LINE_SIZE];
-
- f = fopen(filename, "re");
- if (f == NULL)
- return -1;
- while (fgets(line, sizeof(line), f) != NULL)
- import_property_from_string(dev, line);
- fclose(f);
- return 0;
-}
-
-static int import_program_into_properties(struct udev_event *event,
- usec_t timeout_usec,
- usec_t timeout_warn_usec,
- const char *program, const sigset_t *sigmask) {
- struct udev_device *dev = event->dev;
- char **envp;
- char result[UTIL_LINE_SIZE];
- char *line;
- int err;
-
- envp = udev_device_get_properties_envp(dev);
- err = udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, result, sizeof(result));
- if (err < 0)
- return err;
-
- line = result;
- while (line != NULL) {
- char *pos;
-
- pos = strchr(line, '\n');
- if (pos != NULL) {
- pos[0] = '\0';
- pos = &pos[1];
- }
- import_property_from_string(dev, line);
- line = pos;
- }
- return 0;
-}
-
-static int import_parent_into_properties(struct udev_device *dev, const char *filter) {
- struct udev_device *dev_parent;
- struct udev_list_entry *list_entry;
-
- dev_parent = udev_device_get_parent(dev);
- if (dev_parent == NULL)
- return -1;
-
- udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(dev_parent)) {
- const char *key = udev_list_entry_get_name(list_entry);
- const char *val = udev_list_entry_get_value(list_entry);
-
- if (fnmatch(filter, key, 0) == 0) {
- udev_device_add_property(dev, key, val);
- }
- }
- return 0;
-}
-
-#define WAIT_LOOP_PER_SECOND 50
-static int wait_for_file(struct udev_device *dev, const char *file, int timeout) {
- char filepath[UTIL_PATH_SIZE];
- char devicepath[UTIL_PATH_SIZE];
- struct stat stats;
- int loop = timeout * WAIT_LOOP_PER_SECOND;
-
- /* a relative path is a device attribute */
- devicepath[0] = '\0';
- if (file[0] != '/') {
- strscpyl(devicepath, sizeof(devicepath), udev_device_get_syspath(dev), NULL);
- strscpyl(filepath, sizeof(filepath), devicepath, "/", file, NULL);
- file = filepath;
- }
-
- while (--loop) {
- const struct timespec duration = { 0, 1000 * 1000 * 1000 / WAIT_LOOP_PER_SECOND };
-
- /* lookup file */
- if (stat(file, &stats) == 0) {
- log_debug("file '%s' appeared after %i loops", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1);
- return 0;
- }
- /* make sure, the device did not disappear in the meantime */
- if (devicepath[0] != '\0' && stat(devicepath, &stats) != 0) {
- log_debug("device disappeared while waiting for '%s'", file);
- return -2;
- }
- log_debug("wait for '%s' for %i mseconds", file, 1000 / WAIT_LOOP_PER_SECOND);
- nanosleep(&duration, NULL);
- }
- log_debug("waiting for '%s' failed", file);
- return -1;
-}
-
-static int attr_subst_subdir(char *attr, size_t len) {
- bool found = false;
-
- if (strstr(attr, "/*/")) {
- char *pos;
- char dirname[UTIL_PATH_SIZE];
- const char *tail;
- DIR *dir;
-
- strscpy(dirname, sizeof(dirname), attr);
- pos = strstr(dirname, "/*/");
- if (pos == NULL)
- return -1;
- pos[0] = '\0';
- tail = &pos[2];
- dir = opendir(dirname);
- if (dir != NULL) {
- struct dirent *dent;
-
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- struct stat stats;
-
- if (dent->d_name[0] == '.')
- continue;
- strscpyl(attr, len, dirname, "/", dent->d_name, tail, NULL);
- if (stat(attr, &stats) == 0) {
- found = true;
- break;
- }
- }
- closedir(dir);
- }
- }
-
- return found;
-}
-
-static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, 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;
-
- for (;;) {
- linepos++;
- if (linepos[0] == '\0')
- return -1;
- if (isspace(linepos[0]))
- break;
- if (linepos[0] == '=')
- break;
- if ((linepos[0] == '+') || (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] == '=') {
- *op = OP_MATCH;
- linepos += 2;
- } else if (linepos[0] == '!' && linepos[1] == '=') {
- *op = OP_NOMATCH;
- linepos += 2;
- } else if (linepos[0] == '+' && linepos[1] == '=') {
- *op = OP_ADD;
- linepos += 2;
- } else if (linepos[0] == '-' && linepos[1] == '=') {
- *op = OP_REMOVE;
- linepos += 2;
- } else if (linepos[0] == '=') {
- *op = OP_ASSIGN;
- linepos++;
- } else if (linepos[0] == ':' && linepos[1] == '=') {
- *op = OP_ASSIGN_FINAL;
- linepos += 2;
- } 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;
-
- /* terminate */
- temp = strchr(linepos, '"');
- if (!temp)
- return -1;
- temp[0] = '\0';
- temp++;
-
- /* move line to next key */
- *line = temp;
- return 0;
-}
-
-/* extract possible KEY{attr} */
-static const char *get_key_attribute(struct udev *udev, char *str) {
- char *pos;
- char *attr;
-
- attr = strchr(str, '{');
- if (attr != NULL) {
- attr++;
- pos = strchr(attr, '}');
- if (pos == NULL) {
- log_error("missing closing brace for format");
- return NULL;
- }
- pos[0] = '\0';
- return attr;
- }
- return NULL;
-}
-
-static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
- enum operation_type op,
- const char *value, const void *data) {
- struct token *token = &rule_tmp->token[rule_tmp->token_cur];
- const char *attr = NULL;
-
- memzero(token, sizeof(struct token));
-
- switch (type) {
- case TK_M_ACTION:
- case TK_M_DEVPATH:
- case TK_M_KERNEL:
- case TK_M_SUBSYSTEM:
- case TK_M_DRIVER:
- case TK_M_WAITFOR:
- case TK_M_DEVLINK:
- case TK_M_NAME:
- case TK_M_KERNELS:
- case TK_M_SUBSYSTEMS:
- case TK_M_DRIVERS:
- case TK_M_TAGS:
- case TK_M_PROGRAM:
- case TK_M_IMPORT_FILE:
- case TK_M_IMPORT_PROG:
- case TK_M_IMPORT_DB:
- case TK_M_IMPORT_CMDLINE:
- case TK_M_IMPORT_PARENT:
- case TK_M_RESULT:
- case TK_A_OWNER:
- case TK_A_GROUP:
- case TK_A_MODE:
- case TK_A_DEVLINK:
- case TK_A_NAME:
- case TK_A_GOTO:
- case TK_M_TAG:
- case TK_A_TAG:
- case TK_A_STATIC_NODE:
- token->key.value_off = rules_add_string(rule_tmp->rules, value);
- break;
- case TK_M_IMPORT_BUILTIN:
- token->key.value_off = rules_add_string(rule_tmp->rules, value);
- token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
- break;
- case TK_M_ENV:
- case TK_M_ATTR:
- case TK_M_SYSCTL:
- case TK_M_ATTRS:
- case TK_A_ATTR:
- case TK_A_SYSCTL:
- case TK_A_ENV:
- case TK_A_SECLABEL:
- attr = data;
- token->key.value_off = rules_add_string(rule_tmp->rules, value);
- token->key.attr_off = rules_add_string(rule_tmp->rules, attr);
- break;
- case TK_M_TEST:
- token->key.value_off = rules_add_string(rule_tmp->rules, value);
- if (data != NULL)
- token->key.mode = *(mode_t *)data;
- break;
- case TK_A_STRING_ESCAPE_NONE:
- case TK_A_STRING_ESCAPE_REPLACE:
- case TK_A_DB_PERSIST:
- break;
- case TK_A_RUN_BUILTIN:
- case TK_A_RUN_PROGRAM:
- token->key.builtin_cmd = *(enum udev_builtin_cmd *)data;
- token->key.value_off = rules_add_string(rule_tmp->rules, value);
- break;
- case TK_A_INOTIFY_WATCH:
- case TK_A_DEVLINK_PRIO:
- token->key.devlink_prio = *(int *)data;
- break;
- case TK_A_OWNER_ID:
- token->key.uid = *(uid_t *)data;
- break;
- case TK_A_GROUP_ID:
- token->key.gid = *(gid_t *)data;
- break;
- case TK_A_MODE_ID:
- token->key.mode = *(mode_t *)data;
- break;
- case TK_RULE:
- case TK_M_PARENTS_MIN:
- case TK_M_PARENTS_MAX:
- case TK_M_MAX:
- case TK_END:
- case TK_UNSET:
- log_error("wrong type %u", type);
- return -1;
- }
-
- if (value != NULL && type < TK_M_MAX) {
- /* check if we need to split or call fnmatch() while matching rules */
- enum string_glob_type glob;
- int has_split;
- int has_glob;
-
- has_split = (strchr(value, '|') != NULL);
- has_glob = string_is_glob(value);
- if (has_split && has_glob) {
- glob = GL_SPLIT_GLOB;
- } else if (has_split) {
- glob = GL_SPLIT;
- } else if (has_glob) {
- if (streq(value, "?*"))
- glob = GL_SOMETHING;
- else
- glob = GL_GLOB;
- } else {
- glob = GL_PLAIN;
- }
- token->key.glob = glob;
- }
-
- if (value != NULL && type > TK_M_MAX) {
- /* check if assigned value has substitution chars */
- if (value[0] == '[')
- token->key.subst = SB_SUBSYS;
- else if (strchr(value, '%') != NULL || strchr(value, '$') != NULL)
- token->key.subst = SB_FORMAT;
- else
- token->key.subst = SB_NONE;
- }
-
- if (attr != NULL) {
- /* check if property/attribute name has substitution chars */
- if (attr[0] == '[')
- token->key.attrsubst = SB_SUBSYS;
- else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL)
- token->key.attrsubst = SB_FORMAT;
- else
- token->key.attrsubst = SB_NONE;
- }
-
- token->key.type = type;
- token->key.op = op;
- rule_tmp->token_cur++;
- if (rule_tmp->token_cur >= ELEMENTSOF(rule_tmp->token)) {
- log_error("temporary rule array too small");
- return -1;
- }
- return 0;
-}
-
-static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) {
- unsigned int i;
- unsigned int start = 0;
- unsigned int end = rule_tmp->token_cur;
-
- for (i = 0; i < rule_tmp->token_cur; i++) {
- enum token_type next_val = TK_UNSET;
- unsigned int next_idx = 0;
- unsigned int j;
-
- /* find smallest value */
- for (j = start; j < end; j++) {
- if (rule_tmp->token[j].type == TK_UNSET)
- continue;
- if (next_val == TK_UNSET || rule_tmp->token[j].type < next_val) {
- next_val = rule_tmp->token[j].type;
- next_idx = j;
- }
- }
-
- /* add token and mark done */
- if (add_token(rules, &rule_tmp->token[next_idx]) != 0)
- return -1;
- rule_tmp->token[next_idx].type = TK_UNSET;
-
- /* shrink range */
- if (next_idx == start)
- start++;
- if (next_idx+1 == end)
- end--;
- }
- return 0;
-}
-
-static int add_rule(struct udev_rules *rules, char *line,
- const char *filename, unsigned int filename_off, unsigned int lineno) {
- char *linepos;
- const char *attr;
- struct rule_tmp rule_tmp = {
- .rules = rules,
- .rule.type = TK_RULE,
- };
-
- /* the offset in the rule is limited to unsigned short */
- if (filename_off < USHRT_MAX)
- rule_tmp.rule.rule.filename_off = filename_off;
- rule_tmp.rule.rule.filename_line = lineno;
-
- linepos = line;
- for (;;) {
- char *key;
- char *value;
- enum operation_type op;
-
- if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) {
- /* Avoid erroring on trailing whitespace. This is probably rare
- * so save the work for the error case instead of always trying
- * to strip the trailing whitespace with strstrip(). */
- while (isblank(*linepos))
- linepos++;
-
- /* If we aren't at the end of the line, this is a parsing error.
- * Make a best effort to describe where the problem is. */
- if (!strchr(NEWLINE, *linepos)) {
- char buf[2] = {*linepos};
- _cleanup_free_ char *tmp;
-
- tmp = cescape(buf);
- log_error("invalid key/value pair in file %s on line %u, starting at character %tu ('%s')",
- filename, lineno, linepos - line + 1, tmp);
- if (*linepos == '#')
- log_error("hint: comments can only start at beginning of line");
- }
- break;
- }
-
- if (streq(key, "ACTION")) {
- if (op > OP_MATCH_MAX) {
- log_error("invalid ACTION operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_M_ACTION, op, value, NULL);
- continue;
- }
-
- if (streq(key, "DEVPATH")) {
- if (op > OP_MATCH_MAX) {
- log_error("invalid DEVPATH operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_M_DEVPATH, op, value, NULL);
- continue;
- }
-
- if (streq(key, "KERNEL")) {
- if (op > OP_MATCH_MAX) {
- log_error("invalid KERNEL operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_M_KERNEL, op, value, NULL);
- continue;
- }
-
- if (streq(key, "SUBSYSTEM")) {
- if (op > OP_MATCH_MAX) {
- log_error("invalid SUBSYSTEM operation");
- goto invalid;
- }
- /* bus, class, subsystem events should all be the same */
- if (streq(value, "subsystem") ||
- streq(value, "bus") ||
- streq(value, "class")) {
- if (streq(value, "bus") || streq(value, "class"))
- log_error("'%s' must be specified as 'subsystem' "
- "please fix it in %s:%u", value, filename, lineno);
- rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
- } else
- rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL);
- continue;
- }
-
- if (streq(key, "DRIVER")) {
- if (op > OP_MATCH_MAX) {
- log_error("invalid DRIVER operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_M_DRIVER, op, value, NULL);
- continue;
- }
-
- if (startswith(key, "ATTR{")) {
- attr = get_key_attribute(rules->udev, key + strlen("ATTR"));
- if (attr == NULL) {
- log_error("error parsing ATTR attribute");
- goto invalid;
- }
- if (op == OP_REMOVE) {
- log_error("invalid ATTR operation");
- goto invalid;
- }
- if (op < OP_MATCH_MAX)
- rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
- else
- rule_add_key(&rule_tmp, TK_A_ATTR, op, value, attr);
- continue;
- }
-
- if (startswith(key, "SYSCTL{")) {
- attr = get_key_attribute(rules->udev, key + strlen("SYSCTL"));
- if (attr == NULL) {
- log_error("error parsing SYSCTL attribute");
- goto invalid;
- }
- if (op == OP_REMOVE) {
- log_error("invalid SYSCTL operation");
- goto invalid;
- }
- if (op < OP_MATCH_MAX)
- rule_add_key(&rule_tmp, TK_M_SYSCTL, op, value, attr);
- else
- rule_add_key(&rule_tmp, TK_A_SYSCTL, op, value, attr);
- continue;
- }
-
- if (startswith(key, "SECLABEL{")) {
- attr = get_key_attribute(rules->udev, key + strlen("SECLABEL"));
- if (!attr) {
- log_error("error parsing SECLABEL attribute");
- goto invalid;
- }
- if (op == OP_REMOVE) {
- log_error("invalid SECLABEL operation");
- goto invalid;
- }
-
- rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr);
- continue;
- }
-
- if (streq(key, "KERNELS")) {
- if (op > OP_MATCH_MAX) {
- log_error("invalid KERNELS operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_M_KERNELS, op, value, NULL);
- continue;
- }
-
- if (streq(key, "SUBSYSTEMS")) {
- if (op > OP_MATCH_MAX) {
- log_error("invalid SUBSYSTEMS operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL);
- continue;
- }
-
- if (streq(key, "DRIVERS")) {
- if (op > OP_MATCH_MAX) {
- log_error("invalid DRIVERS operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_M_DRIVERS, op, value, NULL);
- continue;
- }
-
- if (startswith(key, "ATTRS{")) {
- if (op > OP_MATCH_MAX) {
- log_error("invalid ATTRS operation");
- goto invalid;
- }
- attr = get_key_attribute(rules->udev, key + strlen("ATTRS"));
- if (attr == NULL) {
- log_error("error parsing ATTRS attribute");
- goto invalid;
- }
- if (startswith(attr, "device/"))
- log_error("the 'device' link may not be available in a future kernel, "
- "please fix it in %s:%u", filename, lineno);
- else if (strstr(attr, "../") != NULL)
- log_error("do not reference parent sysfs directories directly, "
- "it may break with a future kernel, please fix it in %s:%u", filename, lineno);
- rule_add_key(&rule_tmp, TK_M_ATTRS, op, value, attr);
- continue;
- }
-
- if (streq(key, "TAGS")) {
- if (op > OP_MATCH_MAX) {
- log_error("invalid TAGS operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_M_TAGS, op, value, NULL);
- continue;
- }
-
- if (startswith(key, "ENV{")) {
- attr = get_key_attribute(rules->udev, key + strlen("ENV"));
- if (attr == NULL) {
- log_error("error parsing ENV attribute");
- goto invalid;
- }
- if (op == OP_REMOVE) {
- log_error("invalid ENV operation");
- goto invalid;
- }
- if (op < OP_MATCH_MAX) {
- if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
- goto invalid;
- } else {
- static const char *blacklist[] = {
- "ACTION",
- "SUBSYSTEM",
- "DEVTYPE",
- "MAJOR",
- "MINOR",
- "DRIVER",
- "IFINDEX",
- "DEVNAME",
- "DEVLINKS",
- "DEVPATH",
- "TAGS",
- };
- unsigned int i;
-
- for (i = 0; i < ELEMENTSOF(blacklist); i++) {
- if (!streq(attr, blacklist[i]))
- continue;
- log_error("invalid ENV attribute, '%s' can not be set %s:%u", attr, filename, lineno);
- goto invalid;
- }
- if (rule_add_key(&rule_tmp, TK_A_ENV, op, value, attr) != 0)
- goto invalid;
- }
- continue;
- }
-
- if (streq(key, "TAG")) {
- if (op < OP_MATCH_MAX)
- rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
- else
- rule_add_key(&rule_tmp, TK_A_TAG, op, value, NULL);
- continue;
- }
-
- if (streq(key, "PROGRAM")) {
- if (op == OP_REMOVE) {
- log_error("invalid PROGRAM operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
- continue;
- }
-
- if (streq(key, "RESULT")) {
- if (op > OP_MATCH_MAX) {
- log_error("invalid RESULT operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_M_RESULT, op, value, NULL);
- continue;
- }
-
- if (startswith(key, "IMPORT")) {
- attr = get_key_attribute(rules->udev, key + strlen("IMPORT"));
- if (attr == NULL) {
- log_error("IMPORT{} type missing, ignoring IMPORT %s:%u", filename, lineno);
- continue;
- }
- if (op == OP_REMOVE) {
- log_error("invalid IMPORT operation");
- goto invalid;
- }
- if (streq(attr, "program")) {
- /* find known built-in command */
- if (value[0] != '/') {
- enum udev_builtin_cmd cmd;
-
- cmd = udev_builtin_lookup(value);
- if (cmd < UDEV_BUILTIN_MAX) {
- log_debug("IMPORT found builtin '%s', replacing %s:%u",
- value, filename, lineno);
- rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
- continue;
- }
- }
- rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
- } else if (streq(attr, "builtin")) {
- enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
-
- if (cmd < UDEV_BUILTIN_MAX)
- rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
- else
- log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno);
- } else if (streq(attr, "file")) {
- rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
- } else if (streq(attr, "db")) {
- rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
- } else if (streq(attr, "cmdline")) {
- rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
- } else if (streq(attr, "parent")) {
- rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
- } else
- log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u", filename, lineno);
- continue;
- }
-
- if (startswith(key, "TEST")) {
- mode_t mode = 0;
-
- if (op > OP_MATCH_MAX) {
- log_error("invalid TEST operation");
- goto invalid;
- }
- attr = get_key_attribute(rules->udev, key + strlen("TEST"));
- if (attr != NULL) {
- mode = strtol(attr, NULL, 8);
- rule_add_key(&rule_tmp, TK_M_TEST, op, value, &mode);
- } else {
- rule_add_key(&rule_tmp, TK_M_TEST, op, value, NULL);
- }
- continue;
- }
-
- if (startswith(key, "RUN")) {
- attr = get_key_attribute(rules->udev, key + strlen("RUN"));
- if (attr == NULL)
- attr = "program";
- if (op == OP_REMOVE) {
- log_error("invalid RUN operation");
- goto invalid;
- }
-
- if (streq(attr, "builtin")) {
- enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
-
- if (cmd < UDEV_BUILTIN_MAX)
- rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
- else
- log_error("RUN{builtin}: '%s' unknown %s:%u", value, filename, lineno);
- } else if (streq(attr, "program")) {
- enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
-
- rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
- } else {
- log_error("RUN{} unknown type, ignoring RUN %s:%u", filename, lineno);
- }
-
- continue;
- }
-
- if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
- if (op == OP_REMOVE) {
- log_error("invalid WAIT_FOR/WAIT_FOR_SYSFS operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
- continue;
- }
-
- if (streq(key, "LABEL")) {
- if (op == OP_REMOVE) {
- log_error("invalid LABEL operation");
- goto invalid;
- }
- rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
- continue;
- }
-
- if (streq(key, "GOTO")) {
- if (op == OP_REMOVE) {
- log_error("invalid GOTO operation");
- goto invalid;
- }
- rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
- continue;
- }
-
- if (startswith(key, "NAME")) {
- if (op == OP_REMOVE) {
- log_error("invalid NAME operation");
- goto invalid;
- }
- if (op < OP_MATCH_MAX) {
- rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
- } else {
- if (streq(value, "%k")) {
- log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
- "please remove it from %s:%u\n", filename, lineno);
- continue;
- }
- if (value[0] == '\0') {
- log_debug("NAME=\"\" is ignored, because udev will not delete any device nodes, "
- "please remove it from %s:%u\n", filename, lineno);
- continue;
- }
- rule_add_key(&rule_tmp, TK_A_NAME, op, value, NULL);
- }
- rule_tmp.rule.rule.can_set_name = true;
- continue;
- }
-
- if (streq(key, "SYMLINK")) {
- if (op == OP_REMOVE) {
- log_error("invalid SYMLINK operation");
- goto invalid;
- }
- if (op < OP_MATCH_MAX)
- rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
- else
- rule_add_key(&rule_tmp, TK_A_DEVLINK, op, value, NULL);
- rule_tmp.rule.rule.can_set_name = true;
- continue;
- }
-
- if (streq(key, "OWNER")) {
- uid_t uid;
- char *endptr;
-
- if (op == OP_REMOVE) {
- log_error("invalid OWNER operation");
- goto invalid;
- }
-
- uid = strtoul(value, &endptr, 10);
- if (endptr[0] == '\0') {
- rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
- } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
- uid = add_uid(rules, value);
- rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
- } else if (rules->resolve_names >= 0) {
- rule_add_key(&rule_tmp, TK_A_OWNER, op, value, NULL);
- }
- rule_tmp.rule.rule.can_set_name = true;
- continue;
- }
-
- if (streq(key, "GROUP")) {
- gid_t gid;
- char *endptr;
-
- if (op == OP_REMOVE) {
- log_error("invalid GROUP operation");
- goto invalid;
- }
-
- gid = strtoul(value, &endptr, 10);
- if (endptr[0] == '\0') {
- rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
- } else if ((rules->resolve_names > 0) && strchr("$%", value[0]) == NULL) {
- gid = add_gid(rules, value);
- rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
- } else if (rules->resolve_names >= 0) {
- rule_add_key(&rule_tmp, TK_A_GROUP, op, value, NULL);
- }
- rule_tmp.rule.rule.can_set_name = true;
- continue;
- }
-
- if (streq(key, "MODE")) {
- mode_t mode;
- char *endptr;
-
- if (op == OP_REMOVE) {
- log_error("invalid MODE operation");
- goto invalid;
- }
-
- mode = strtol(value, &endptr, 8);
- if (endptr[0] == '\0')
- rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
- else
- rule_add_key(&rule_tmp, TK_A_MODE, op, value, NULL);
- rule_tmp.rule.rule.can_set_name = true;
- continue;
- }
-
- if (streq(key, "OPTIONS")) {
- const char *pos;
-
- if (op == OP_REMOVE) {
- log_error("invalid OPTIONS operation");
- goto invalid;
- }
-
- pos = strstr(value, "link_priority=");
- if (pos != NULL) {
- int prio = atoi(&pos[strlen("link_priority=")]);
-
- rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio);
- }
-
- pos = strstr(value, "string_escape=");
- if (pos != NULL) {
- pos = &pos[strlen("string_escape=")];
- if (startswith(pos, "none"))
- rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
- else if (startswith(pos, "replace"))
- rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
- }
-
- pos = strstr(value, "db_persist");
- if (pos != NULL)
- rule_add_key(&rule_tmp, TK_A_DB_PERSIST, op, NULL, NULL);
-
- pos = strstr(value, "nowatch");
- if (pos != NULL) {
- const int off = 0;
-
- rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &off);
- } else {
- pos = strstr(value, "watch");
- if (pos != NULL) {
- const int on = 1;
-
- rule_add_key(&rule_tmp, TK_A_INOTIFY_WATCH, op, NULL, &on);
- }
- }
-
- pos = strstr(value, "static_node=");
- if (pos != NULL) {
- rule_add_key(&rule_tmp, TK_A_STATIC_NODE, op, &pos[strlen("static_node=")], NULL);
- rule_tmp.rule.rule.has_static_node = true;
- }
-
- continue;
- }
-
- log_error("unknown key '%s' in %s:%u", key, filename, lineno);
- goto invalid;
- }
-
- /* add rule token */
- rule_tmp.rule.rule.token_count = 1 + rule_tmp.token_cur;
- if (add_token(rules, &rule_tmp.rule) != 0)
- goto invalid;
-
- /* add tokens to list, sorted by type */
- if (sort_token(rules, &rule_tmp) != 0)
- goto invalid;
-
- return 0;
-invalid:
- log_error("invalid rule '%s:%u'", filename, lineno);
- return -1;
-}
-
-static int parse_file(struct udev_rules *rules, const char *filename) {
- _cleanup_fclose_ FILE *f = NULL;
- unsigned int first_token;
- unsigned int filename_off;
- char line[UTIL_LINE_SIZE];
- int line_nr = 0;
- unsigned int i;
-
- f = fopen(filename, "re");
- if (!f) {
- if (errno == ENOENT)
- return 0;
- else
- return -errno;
- }
-
- if (null_or_empty_fd(fileno(f))) {
- log_debug("Skipping empty file: %s", filename);
- return 0;
- } else
- log_debug("Reading rules file: %s", filename);
-
- first_token = rules->token_cur;
- filename_off = rules_add_string(rules, filename);
-
- while (fgets(line, sizeof(line), f) != NULL) {
- 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;
- if (strlen(&line[len-2]) < 2)
- break;
- line_nr++;
- len = strlen(line);
- }
-
- if (len+1 >= sizeof(line)) {
- log_error("line too long '%s':%u, ignored", filename, line_nr);
- continue;
- }
- add_rule(rules, key, filename, filename_off, line_nr);
- }
-
- /* link GOTOs to LABEL rules in this file to be able to fast-forward */
- for (i = first_token+1; i < rules->token_cur; i++) {
- if (rules->tokens[i].type == TK_A_GOTO) {
- char *label = rules_str(rules, rules->tokens[i].key.value_off);
- unsigned int j;
-
- for (j = i+1; j < rules->token_cur; j++) {
- if (rules->tokens[j].type != TK_RULE)
- continue;
- if (rules->tokens[j].rule.label_off == 0)
- continue;
- if (!streq(label, rules_str(rules, rules->tokens[j].rule.label_off)))
- continue;
- rules->tokens[i].key.rule_goto = j;
- break;
- }
- if (rules->tokens[i].key.rule_goto == 0)
- log_error("GOTO '%s' has no matching label in: '%s'", label, filename);
- }
- }
- return 0;
-}
-
-struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) {
- struct udev_rules *rules;
- struct udev_list file_list;
- struct token end_token;
- char **files, **f;
- int r;
-
- rules = new0(struct udev_rules, 1);
- if (rules == NULL)
- return NULL;
- rules->udev = udev;
- rules->resolve_names = resolve_names;
- udev_list_init(udev, &file_list, true);
-
- /* init token array and string buffer */
- rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token));
- if (rules->tokens == NULL)
- return udev_rules_unref(rules);
- rules->token_max = PREALLOC_TOKEN;
-
- rules->strbuf = strbuf_new();
- if (!rules->strbuf)
- return udev_rules_unref(rules);
-
- udev_rules_check_timestamp(rules);
-
- r = conf_files_list_strv(&files, ".rules", NULL, rules_dirs);
- if (r < 0) {
- log_error_errno(r, "failed to enumerate rules files: %m");
- return udev_rules_unref(rules);
- }
-
- /*
- * The offset value in the rules strct is limited; add all
- * rules file names to the beginning of the string buffer.
- */
- STRV_FOREACH(f, files)
- rules_add_string(rules, *f);
-
- STRV_FOREACH(f, files)
- parse_file(rules, *f);
-
- strv_free(files);
-
- memzero(&end_token, sizeof(struct token));
- end_token.type = TK_END;
- add_token(rules, &end_token);
- log_debug("rules contain %zu bytes tokens (%u * %zu bytes), %zu bytes strings",
- rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->strbuf->len);
-
- /* cleanup temporary strbuf data */
- log_debug("%zu strings (%zu bytes), %zu de-duplicated (%zu bytes), %zu trie nodes used",
- rules->strbuf->in_count, rules->strbuf->in_len,
- rules->strbuf->dedup_count, rules->strbuf->dedup_len, rules->strbuf->nodes_count);
- strbuf_complete(rules->strbuf);
-
- /* cleanup uid/gid cache */
- free(rules->uids);
- rules->uids = NULL;
- rules->uids_cur = 0;
- rules->uids_max = 0;
- free(rules->gids);
- rules->gids = NULL;
- rules->gids_cur = 0;
- rules->gids_max = 0;
-
- dump_rules(rules);
- return rules;
-}
-
-struct udev_rules *udev_rules_unref(struct udev_rules *rules) {
- if (rules == NULL)
- return NULL;
- free(rules->tokens);
- strbuf_cleanup(rules->strbuf);
- free(rules->uids);
- free(rules->gids);
- free(rules);
- return NULL;
-}
-
-bool udev_rules_check_timestamp(struct udev_rules *rules) {
- if (!rules)
- return false;
-
- return paths_check_timestamp(rules_dirs, &rules->dirs_ts_usec, true);
-}
-
-static int match_key(struct udev_rules *rules, struct token *token, const char *val) {
- char *key_value = rules_str(rules, token->key.value_off);
- char *pos;
- bool match = false;
-
- if (val == NULL)
- val = "";
-
- switch (token->key.glob) {
- case GL_PLAIN:
- match = (streq(key_value, val));
- break;
- case GL_GLOB:
- match = (fnmatch(key_value, val, 0) == 0);
- break;
- case GL_SPLIT:
- {
- const char *s;
- size_t len;
-
- s = rules_str(rules, token->key.value_off);
- len = strlen(val);
- for (;;) {
- const char *next;
-
- next = strchr(s, '|');
- if (next != NULL) {
- size_t matchlen = (size_t)(next - s);
-
- match = (matchlen == len && strneq(s, val, matchlen));
- if (match)
- break;
- } else {
- match = (streq(s, val));
- break;
- }
- s = &next[1];
- }
- break;
- }
- case GL_SPLIT_GLOB:
- {
- char value[UTIL_PATH_SIZE];
-
- strscpy(value, sizeof(value), rules_str(rules, token->key.value_off));
- key_value = value;
- while (key_value != NULL) {
- pos = strchr(key_value, '|');
- if (pos != NULL) {
- pos[0] = '\0';
- pos = &pos[1];
- }
- match = (fnmatch(key_value, val, 0) == 0);
- if (match)
- break;
- key_value = pos;
- }
- break;
- }
- case GL_SOMETHING:
- match = (val[0] != '\0');
- break;
- case GL_UNSET:
- return -1;
- }
-
- if (match && (token->key.op == OP_MATCH))
- return 0;
- if (!match && (token->key.op == OP_NOMATCH))
- return 0;
- return -1;
-}
-
-static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) {
- const char *name;
- char nbuf[UTIL_NAME_SIZE];
- const char *value;
- char vbuf[UTIL_NAME_SIZE];
- size_t len;
-
- name = rules_str(rules, cur->key.attr_off);
- switch (cur->key.attrsubst) {
- case SB_FORMAT:
- udev_event_apply_format(event, name, nbuf, sizeof(nbuf));
- name = nbuf;
- /* fall through */
- case SB_NONE:
- value = udev_device_get_sysattr_value(dev, name);
- if (value == NULL)
- return -1;
- break;
- case SB_SUBSYS:
- if (util_resolve_subsys_kernel(event->udev, name, vbuf, sizeof(vbuf), 1) != 0)
- return -1;
- value = vbuf;
- break;
- default:
- return -1;
- }
-
- /* remove trailing whitespace, if not asked to match for it */
- len = strlen(value);
- if (len > 0 && isspace(value[len-1])) {
- const char *key_value;
- size_t klen;
-
- key_value = rules_str(rules, cur->key.value_off);
- klen = strlen(key_value);
- if (klen > 0 && !isspace(key_value[klen-1])) {
- if (value != vbuf) {
- strscpy(vbuf, sizeof(vbuf), value);
- value = vbuf;
- }
- while (len > 0 && isspace(vbuf[--len]))
- vbuf[len] = '\0';
- }
- }
-
- return match_key(rules, cur, value);
-}
-
-enum escape_type {
- ESCAPE_UNSET,
- ESCAPE_NONE,
- ESCAPE_REPLACE,
-};
-
-int udev_rules_apply_to_event(struct udev_rules *rules,
- struct udev_event *event,
- usec_t timeout_usec,
- usec_t timeout_warn_usec,
- struct udev_list *properties_list,
- const sigset_t *sigmask) {
- struct token *cur;
- struct token *rule;
- enum escape_type esc = ESCAPE_UNSET;
- bool can_set_name;
-
- if (rules->tokens == NULL)
- return -1;
-
- can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
- (major(udev_device_get_devnum(event->dev)) > 0 ||
- udev_device_get_ifindex(event->dev) > 0));
-
- /* loop through token list, match, run actions or forward to next rule */
- cur = &rules->tokens[0];
- rule = cur;
- for (;;) {
- dump_token(rules, cur);
- switch (cur->type) {
- case TK_RULE:
- /* current rule */
- rule = cur;
- /* possibly skip rules which want to set NAME, SYMLINK, OWNER, GROUP, MODE */
- if (!can_set_name && rule->rule.can_set_name)
- goto nomatch;
- esc = ESCAPE_UNSET;
- break;
- case TK_M_ACTION:
- if (match_key(rules, cur, udev_device_get_action(event->dev)) != 0)
- goto nomatch;
- break;
- case TK_M_DEVPATH:
- if (match_key(rules, cur, udev_device_get_devpath(event->dev)) != 0)
- goto nomatch;
- break;
- case TK_M_KERNEL:
- if (match_key(rules, cur, udev_device_get_sysname(event->dev)) != 0)
- goto nomatch;
- break;
- case TK_M_DEVLINK: {
- struct udev_list_entry *list_entry;
- bool match = false;
-
- udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(event->dev)) {
- const char *devlink;
-
- devlink = udev_list_entry_get_name(list_entry) + strlen("/dev/");
- if (match_key(rules, cur, devlink) == 0) {
- match = true;
- break;
- }
- }
- if (!match)
- goto nomatch;
- break;
- }
- case TK_M_NAME:
- if (match_key(rules, cur, event->name) != 0)
- goto nomatch;
- break;
- case TK_M_ENV: {
- const char *key_name = rules_str(rules, cur->key.attr_off);
- const char *value;
-
- value = udev_device_get_property_value(event->dev, key_name);
-
- /* check global properties */
- if (!value && properties_list) {
- struct udev_list_entry *list_entry;
-
- list_entry = udev_list_get_entry(properties_list);
- list_entry = udev_list_entry_get_by_name(list_entry, key_name);
- if (list_entry != NULL)
- value = udev_list_entry_get_value(list_entry);
- }
-
- if (!value)
- value = "";
- if (match_key(rules, cur, value))
- goto nomatch;
- break;
- }
- case TK_M_TAG: {
- struct udev_list_entry *list_entry;
- bool match = false;
-
- udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
- if (streq(rules_str(rules, cur->key.value_off), udev_list_entry_get_name(list_entry))) {
- match = true;
- break;
- }
- }
- if (!match && (cur->key.op != OP_NOMATCH))
- goto nomatch;
- break;
- }
- case TK_M_SUBSYSTEM:
- if (match_key(rules, cur, udev_device_get_subsystem(event->dev)) != 0)
- goto nomatch;
- break;
- case TK_M_DRIVER:
- if (match_key(rules, cur, udev_device_get_driver(event->dev)) != 0)
- goto nomatch;
- break;
- case TK_M_WAITFOR: {
- char filename[UTIL_PATH_SIZE];
- int found;
-
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
- found = (wait_for_file(event->dev, filename, 10) == 0);
- if (!found && (cur->key.op != OP_NOMATCH))
- goto nomatch;
- break;
- }
- case TK_M_ATTR:
- if (match_attr(rules, event->dev, event, cur) != 0)
- goto nomatch;
- break;
- case TK_M_SYSCTL: {
- char filename[UTIL_PATH_SIZE];
- _cleanup_free_ char *value = NULL;
- size_t len;
-
- udev_event_apply_format(event, rules_str(rules, cur->key.attr_off), filename, sizeof(filename));
- sysctl_normalize(filename);
- if (sysctl_read(filename, &value) < 0)
- goto nomatch;
-
- len = strlen(value);
- while (len > 0 && isspace(value[--len]))
- value[len] = '\0';
- if (match_key(rules, cur, value) != 0)
- goto nomatch;
- break;
- }
- case TK_M_KERNELS:
- case TK_M_SUBSYSTEMS:
- case TK_M_DRIVERS:
- case TK_M_ATTRS:
- case TK_M_TAGS: {
- struct token *next;
-
- /* get whole sequence of parent matches */
- next = cur;
- while (next->type > TK_M_PARENTS_MIN && next->type < TK_M_PARENTS_MAX)
- next++;
-
- /* loop over parents */
- event->dev_parent = event->dev;
- for (;;) {
- struct token *key;
-
- /* loop over sequence of parent match keys */
- for (key = cur; key < next; key++ ) {
- dump_token(rules, key);
- switch(key->type) {
- case TK_M_KERNELS:
- if (match_key(rules, key, udev_device_get_sysname(event->dev_parent)) != 0)
- goto try_parent;
- break;
- case TK_M_SUBSYSTEMS:
- if (match_key(rules, key, udev_device_get_subsystem(event->dev_parent)) != 0)
- goto try_parent;
- break;
- case TK_M_DRIVERS:
- if (match_key(rules, key, udev_device_get_driver(event->dev_parent)) != 0)
- goto try_parent;
- break;
- case TK_M_ATTRS:
- if (match_attr(rules, event->dev_parent, event, key) != 0)
- goto try_parent;
- break;
- case TK_M_TAGS: {
- bool match = udev_device_has_tag(event->dev_parent, rules_str(rules, cur->key.value_off));
-
- if (match && key->key.op == OP_NOMATCH)
- goto try_parent;
- if (!match && key->key.op == OP_MATCH)
- goto try_parent;
- break;
- }
- default:
- goto nomatch;
- }
- }
- break;
-
- try_parent:
- event->dev_parent = udev_device_get_parent(event->dev_parent);
- if (event->dev_parent == NULL)
- goto nomatch;
- }
- /* move behind our sequence of parent match keys */
- cur = next;
- continue;
- }
- case TK_M_TEST: {
- char filename[UTIL_PATH_SIZE];
- struct stat statbuf;
- int match;
-
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename));
- if (util_resolve_subsys_kernel(event->udev, filename, filename, sizeof(filename), 0) != 0) {
- if (filename[0] != '/') {
- char tmp[UTIL_PATH_SIZE];
-
- strscpy(tmp, sizeof(tmp), filename);
- strscpyl(filename, sizeof(filename),
- udev_device_get_syspath(event->dev), "/", tmp, NULL);
- }
- }
- attr_subst_subdir(filename, sizeof(filename));
-
- match = (stat(filename, &statbuf) == 0);
- if (match && cur->key.mode > 0)
- match = ((statbuf.st_mode & cur->key.mode) > 0);
- if (match && cur->key.op == OP_NOMATCH)
- goto nomatch;
- if (!match && cur->key.op == OP_MATCH)
- goto nomatch;
- break;
- }
- case TK_M_PROGRAM: {
- char program[UTIL_PATH_SIZE];
- char **envp;
- char result[UTIL_LINE_SIZE];
-
- free(event->program_result);
- event->program_result = NULL;
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
- envp = udev_device_get_properties_envp(event->dev);
- log_debug("PROGRAM '%s' %s:%u",
- program,
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
-
- if (udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, result, sizeof(result)) < 0) {
- if (cur->key.op != OP_NOMATCH)
- goto nomatch;
- } else {
- int count;
-
- util_remove_trailing_chars(result, '\n');
- if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
- count = util_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
- if (count > 0)
- log_debug("%i character(s) replaced" , count);
- }
- event->program_result = strdup(result);
- if (cur->key.op == OP_NOMATCH)
- goto nomatch;
- }
- break;
- }
- case TK_M_IMPORT_FILE: {
- char import[UTIL_PATH_SIZE];
-
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
- if (import_file_into_properties(event->dev, import) != 0)
- if (cur->key.op != OP_NOMATCH)
- goto nomatch;
- break;
- }
- case TK_M_IMPORT_PROG: {
- char import[UTIL_PATH_SIZE];
-
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
- log_debug("IMPORT '%s' %s:%u",
- import,
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
-
- if (import_program_into_properties(event, timeout_usec, timeout_warn_usec, import, sigmask) != 0)
- if (cur->key.op != OP_NOMATCH)
- goto nomatch;
- break;
- }
- case TK_M_IMPORT_BUILTIN: {
- char command[UTIL_PATH_SIZE];
-
- if (udev_builtin_run_once(cur->key.builtin_cmd)) {
- /* check if we ran already */
- if (event->builtin_run & (1 << cur->key.builtin_cmd)) {
- log_debug("IMPORT builtin skip '%s' %s:%u",
- udev_builtin_name(cur->key.builtin_cmd),
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
- /* return the result from earlier run */
- if (event->builtin_ret & (1 << cur->key.builtin_cmd))
- if (cur->key.op != OP_NOMATCH)
- goto nomatch;
- break;
- }
- /* mark as ran */
- event->builtin_run |= (1 << cur->key.builtin_cmd);
- }
-
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), command, sizeof(command));
- log_debug("IMPORT builtin '%s' %s:%u",
- udev_builtin_name(cur->key.builtin_cmd),
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
-
- if (udev_builtin_run(event->dev, cur->key.builtin_cmd, command, false) != 0) {
- /* remember failure */
- log_debug("IMPORT builtin '%s' returned non-zero",
- udev_builtin_name(cur->key.builtin_cmd));
- event->builtin_ret |= (1 << cur->key.builtin_cmd);
- if (cur->key.op != OP_NOMATCH)
- goto nomatch;
- }
- break;
- }
- case TK_M_IMPORT_DB: {
- const char *key = rules_str(rules, cur->key.value_off);
- const char *value;
-
- value = udev_device_get_property_value(event->dev_db, key);
- if (value != NULL)
- udev_device_add_property(event->dev, key, value);
- else {
- if (cur->key.op != OP_NOMATCH)
- goto nomatch;
- }
- break;
- }
- case TK_M_IMPORT_CMDLINE: {
- FILE *f;
- bool imported = false;
-
- f = fopen("/proc/cmdline", "re");
- if (f != NULL) {
- char cmdline[4096];
-
- if (fgets(cmdline, sizeof(cmdline), f) != NULL) {
- const char *key = rules_str(rules, cur->key.value_off);
- char *pos;
-
- pos = strstr(cmdline, key);
- if (pos != NULL) {
- pos += strlen(key);
- if (pos[0] == '\0' || isspace(pos[0])) {
- /* we import simple flags as 'FLAG=1' */
- udev_device_add_property(event->dev, key, "1");
- imported = true;
- } else if (pos[0] == '=') {
- const char *value;
-
- pos++;
- value = pos;
- while (pos[0] != '\0' && !isspace(pos[0]))
- pos++;
- pos[0] = '\0';
- udev_device_add_property(event->dev, key, value);
- imported = true;
- }
- }
- }
- fclose(f);
- }
- if (!imported && cur->key.op != OP_NOMATCH)
- goto nomatch;
- break;
- }
- case TK_M_IMPORT_PARENT: {
- char import[UTIL_PATH_SIZE];
-
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), import, sizeof(import));
- if (import_parent_into_properties(event->dev, import) != 0)
- if (cur->key.op != OP_NOMATCH)
- goto nomatch;
- break;
- }
- case TK_M_RESULT:
- if (match_key(rules, cur, event->program_result) != 0)
- goto nomatch;
- break;
- case TK_A_STRING_ESCAPE_NONE:
- esc = ESCAPE_NONE;
- break;
- case TK_A_STRING_ESCAPE_REPLACE:
- esc = ESCAPE_REPLACE;
- break;
- case TK_A_DB_PERSIST:
- udev_device_set_db_persist(event->dev);
- break;
- case TK_A_INOTIFY_WATCH:
- if (event->inotify_watch_final)
- break;
- if (cur->key.op == OP_ASSIGN_FINAL)
- event->inotify_watch_final = true;
- event->inotify_watch = cur->key.watch;
- break;
- case TK_A_DEVLINK_PRIO:
- udev_device_set_devlink_priority(event->dev, cur->key.devlink_prio);
- break;
- case TK_A_OWNER: {
- char owner[UTIL_NAME_SIZE];
- const char *ow = owner;
- int r;
-
- if (event->owner_final)
- break;
- if (cur->key.op == OP_ASSIGN_FINAL)
- event->owner_final = true;
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
- event->owner_set = true;
- r = get_user_creds(&ow, &event->uid, NULL, NULL, NULL);
- if (r < 0) {
- if (r == -ENOENT || r == -ESRCH)
- log_error("specified user '%s' unknown", owner);
- else
- log_error_errno(r, "error resolving user '%s': %m", owner);
-
- event->uid = 0;
- }
- log_debug("OWNER %u %s:%u",
- event->uid,
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
- break;
- }
- case TK_A_GROUP: {
- char group[UTIL_NAME_SIZE];
- const char *gr = group;
- int r;
-
- if (event->group_final)
- break;
- if (cur->key.op == OP_ASSIGN_FINAL)
- event->group_final = true;
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
- event->group_set = true;
- r = get_group_creds(&gr, &event->gid);
- if (r < 0) {
- if (r == -ENOENT || r == -ESRCH)
- log_error("specified group '%s' unknown", group);
- else
- log_error_errno(r, "error resolving group '%s': %m", group);
-
- event->gid = 0;
- }
- log_debug("GROUP %u %s:%u",
- event->gid,
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
- break;
- }
- case TK_A_MODE: {
- char mode_str[UTIL_NAME_SIZE];
- mode_t mode;
- char *endptr;
-
- if (event->mode_final)
- break;
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), mode_str, sizeof(mode_str));
- mode = strtol(mode_str, &endptr, 8);
- if (endptr[0] != '\0') {
- log_error("ignoring invalid mode '%s'", mode_str);
- break;
- }
- if (cur->key.op == OP_ASSIGN_FINAL)
- event->mode_final = true;
- event->mode_set = true;
- event->mode = mode;
- log_debug("MODE %#o %s:%u",
- event->mode,
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
- break;
- }
- case TK_A_OWNER_ID:
- if (event->owner_final)
- break;
- if (cur->key.op == OP_ASSIGN_FINAL)
- event->owner_final = true;
- event->owner_set = true;
- event->uid = cur->key.uid;
- log_debug("OWNER %u %s:%u",
- event->uid,
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
- break;
- case TK_A_GROUP_ID:
- if (event->group_final)
- break;
- if (cur->key.op == OP_ASSIGN_FINAL)
- event->group_final = true;
- event->group_set = true;
- event->gid = cur->key.gid;
- log_debug("GROUP %u %s:%u",
- event->gid,
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
- break;
- case TK_A_MODE_ID:
- if (event->mode_final)
- break;
- if (cur->key.op == OP_ASSIGN_FINAL)
- event->mode_final = true;
- event->mode_set = true;
- event->mode = cur->key.mode;
- log_debug("MODE %#o %s:%u",
- event->mode,
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
- break;
- case TK_A_SECLABEL: {
- const char *name, *label;
-
- name = rules_str(rules, cur->key.attr_off);
- label = rules_str(rules, cur->key.value_off);
- if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
- udev_list_cleanup(&event->seclabel_list);
- udev_list_entry_add(&event->seclabel_list, name, label);
- log_debug("SECLABEL{%s}='%s' %s:%u",
- name, label,
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
- break;
- }
- case TK_A_ENV: {
- const char *name = rules_str(rules, cur->key.attr_off);
- char *value = rules_str(rules, cur->key.value_off);
- char value_new[UTIL_NAME_SIZE];
- const char *value_old = NULL;
-
- if (value[0] == '\0') {
- if (cur->key.op == OP_ADD)
- break;
- udev_device_add_property(event->dev, name, NULL);
- break;
- }
-
- if (cur->key.op == OP_ADD)
- value_old = udev_device_get_property_value(event->dev, name);
- if (value_old) {
- char temp[UTIL_NAME_SIZE];
-
- /* append value separated by space */
- udev_event_apply_format(event, value, temp, sizeof(temp));
- strscpyl(value_new, sizeof(value_new), value_old, " ", temp, NULL);
- } else
- udev_event_apply_format(event, value, value_new, sizeof(value_new));
-
- udev_device_add_property(event->dev, name, value_new);
- break;
- }
- case TK_A_TAG: {
- char tag[UTIL_PATH_SIZE];
- const char *p;
-
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), tag, sizeof(tag));
- if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
- udev_device_cleanup_tags_list(event->dev);
- for (p = tag; *p != '\0'; p++) {
- if ((*p >= 'a' && *p <= 'z') ||
- (*p >= 'A' && *p <= 'Z') ||
- (*p >= '0' && *p <= '9') ||
- *p == '-' || *p == '_')
- continue;
- log_error("ignoring invalid tag name '%s'", tag);
- break;
- }
- if (cur->key.op == OP_REMOVE)
- udev_device_remove_tag(event->dev, tag);
- else
- udev_device_add_tag(event->dev, tag);
- break;
- }
- case TK_A_NAME: {
- const char *name = rules_str(rules, cur->key.value_off);
-
- char name_str[UTIL_PATH_SIZE];
- int count;
-
- if (event->name_final)
- break;
- if (cur->key.op == OP_ASSIGN_FINAL)
- event->name_final = true;
- udev_event_apply_format(event, name, name_str, sizeof(name_str));
- if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) {
- count = util_replace_chars(name_str, "/");
- if (count > 0)
- log_debug("%i character(s) replaced", count);
- }
- if (major(udev_device_get_devnum(event->dev)) &&
- (!streq(name_str, udev_device_get_devnode(event->dev) + strlen("/dev/")))) {
- log_error("NAME=\"%s\" ignored, kernel device nodes "
- "can not be renamed; please fix it in %s:%u\n", name,
- rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
- break;
- }
- free(event->name);
- event->name = strdup(name_str);
- log_debug("NAME '%s' %s:%u",
- event->name,
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
- break;
- }
- case TK_A_DEVLINK: {
- char temp[UTIL_PATH_SIZE];
- char filename[UTIL_PATH_SIZE];
- char *pos, *next;
- int count = 0;
-
- if (event->devlink_final)
- break;
- if (major(udev_device_get_devnum(event->dev)) == 0)
- break;
- if (cur->key.op == OP_ASSIGN_FINAL)
- event->devlink_final = true;
- if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
- udev_device_cleanup_devlinks_list(event->dev);
-
- /* allow multiple symlinks separated by spaces */
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), temp, sizeof(temp));
- if (esc == ESCAPE_UNSET)
- count = util_replace_chars(temp, "/ ");
- else if (esc == ESCAPE_REPLACE)
- count = util_replace_chars(temp, "/");
- if (count > 0)
- log_debug("%i character(s) replaced" , count);
- pos = temp;
- while (isspace(pos[0]))
- pos++;
- next = strchr(pos, ' ');
- while (next != NULL) {
- next[0] = '\0';
- log_debug("LINK '%s' %s:%u", pos,
- rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
- strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
- udev_device_add_devlink(event->dev, filename);
- while (isspace(next[1]))
- next++;
- pos = &next[1];
- next = strchr(pos, ' ');
- }
- if (pos[0] != '\0') {
- log_debug("LINK '%s' %s:%u", pos,
- rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
- strscpyl(filename, sizeof(filename), "/dev/", pos, NULL);
- udev_device_add_devlink(event->dev, filename);
- }
- break;
- }
- case TK_A_ATTR: {
- const char *key_name = rules_str(rules, cur->key.attr_off);
- char attr[UTIL_PATH_SIZE];
- char value[UTIL_NAME_SIZE];
- FILE *f;
-
- if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0)
- strscpyl(attr, sizeof(attr), udev_device_get_syspath(event->dev), "/", key_name, NULL);
- attr_subst_subdir(attr, sizeof(attr));
-
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
- log_debug("ATTR '%s' writing '%s' %s:%u", attr, value,
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
- f = fopen(attr, "we");
- if (f != NULL) {
- if (fprintf(f, "%s", value) <= 0)
- log_error_errno(errno, "error writing ATTR{%s}: %m", attr);
- fclose(f);
- } else {
- log_error_errno(errno, "error opening ATTR{%s} for writing: %m", attr);
- }
- break;
- }
- case TK_A_SYSCTL: {
- char filename[UTIL_PATH_SIZE];
- char value[UTIL_NAME_SIZE];
- int r;
-
- udev_event_apply_format(event, rules_str(rules, cur->key.attr_off), filename, sizeof(filename));
- sysctl_normalize(filename);
- udev_event_apply_format(event, rules_str(rules, cur->key.value_off), value, sizeof(value));
- log_debug("SYSCTL '%s' writing '%s' %s:%u", filename, value,
- rules_str(rules, rule->rule.filename_off), rule->rule.filename_line);
- r = sysctl_write(filename, value);
- if (r < 0)
- log_error("error writing SYSCTL{%s}='%s': %s", filename, value, strerror(-r));
- break;
- }
- case TK_A_RUN_BUILTIN:
- case TK_A_RUN_PROGRAM: {
- struct udev_list_entry *entry;
-
- if (cur->key.op == OP_ASSIGN || cur->key.op == OP_ASSIGN_FINAL)
- udev_list_cleanup(&event->run_list);
- log_debug("RUN '%s' %s:%u",
- rules_str(rules, cur->key.value_off),
- rules_str(rules, rule->rule.filename_off),
- rule->rule.filename_line);
- entry = udev_list_entry_add(&event->run_list, rules_str(rules, cur->key.value_off), NULL);
- udev_list_entry_set_num(entry, cur->key.builtin_cmd);
- break;
- }
- case TK_A_GOTO:
- if (cur->key.rule_goto == 0)
- break;
- cur = &rules->tokens[cur->key.rule_goto];
- continue;
- case TK_END:
- return 0;
-
- case TK_M_PARENTS_MIN:
- case TK_M_PARENTS_MAX:
- case TK_M_MAX:
- case TK_UNSET:
- log_error("wrong type %u", cur->type);
- goto nomatch;
- }
-
- cur++;
- continue;
- nomatch:
- /* fast-forward to next rule */
- cur = rule + rule->rule.token_count;
- }
-}
-
-int udev_rules_apply_static_dev_perms(struct udev_rules *rules) {
- struct token *cur;
- struct token *rule;
- uid_t uid = 0;
- gid_t gid = 0;
- mode_t mode = 0;
- _cleanup_strv_free_ char **tags = NULL;
- char **t;
- FILE *f = NULL;
- _cleanup_free_ char *path = NULL;
- int r = 0;
-
- if (rules->tokens == NULL)
- return 0;
-
- cur = &rules->tokens[0];
- rule = cur;
- for (;;) {
- switch (cur->type) {
- case TK_RULE:
- /* current rule */
- rule = cur;
-
- /* skip rules without a static_node tag */
- if (!rule->rule.has_static_node)
- goto next;
-
- uid = 0;
- gid = 0;
- mode = 0;
- strv_free(tags);
- tags = NULL;
- break;
- case TK_A_OWNER_ID:
- uid = cur->key.uid;
- break;
- case TK_A_GROUP_ID:
- gid = cur->key.gid;
- break;
- case TK_A_MODE_ID:
- mode = cur->key.mode;
- break;
- case TK_A_TAG:
- r = strv_extend(&tags, rules_str(rules, cur->key.value_off));
- if (r < 0)
- goto finish;
-
- break;
- case TK_A_STATIC_NODE: {
- char device_node[UTIL_PATH_SIZE];
- char tags_dir[UTIL_PATH_SIZE];
- char tag_symlink[UTIL_PATH_SIZE];
- struct stat stats;
-
- /* we assure, that the permissions tokens are sorted before the static token */
-
- if (mode == 0 && uid == 0 && gid == 0 && tags == NULL)
- goto next;
-
- strscpyl(device_node, sizeof(device_node), "/dev/", rules_str(rules, cur->key.value_off), NULL);
- if (stat(device_node, &stats) != 0)
- break;
- if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode))
- break;
-
- /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */
- if (tags) {
- STRV_FOREACH(t, tags) {
- _cleanup_free_ char *unescaped_filename = NULL;
-
- strscpyl(tags_dir, sizeof(tags_dir), "/run/udev/static_node-tags/", *t, "/", NULL);
- r = mkdir_p(tags_dir, 0755);
- if (r < 0)
- return log_error_errno(r, "failed to create %s: %m", tags_dir);
-
- unescaped_filename = xescape(rules_str(rules, cur->key.value_off), "/.");
-
- strscpyl(tag_symlink, sizeof(tag_symlink), tags_dir, unescaped_filename, NULL);
- r = symlink(device_node, tag_symlink);
- if (r < 0 && errno != EEXIST)
- return log_error_errno(errno, "failed to create symlink %s -> %s: %m",
- tag_symlink, device_node);
- else
- r = 0;
- }
- }
-
- /* don't touch the permissions if only the tags were set */
- if (mode == 0 && uid == 0 && gid == 0)
- break;
-
- if (mode == 0) {
- if (gid > 0)
- mode = 0660;
- else
- mode = 0600;
- }
- if (mode != (stats.st_mode & 01777)) {
- r = chmod(device_node, mode);
- if (r < 0) {
- log_error("failed to chmod '%s' %#o", device_node, mode);
- return -errno;
- } else
- log_debug("chmod '%s' %#o", device_node, mode);
- }
-
- if ((uid != 0 && uid != stats.st_uid) || (gid != 0 && gid != stats.st_gid)) {
- r = chown(device_node, uid, gid);
- if (r < 0) {
- log_error("failed to chown '%s' %u %u ", device_node, uid, gid);
- return -errno;
- } else
- log_debug("chown '%s' %u %u", device_node, uid, gid);
- }
-
- utimensat(AT_FDCWD, device_node, NULL, 0);
- break;
- }
- case TK_END:
- goto finish;
- }
-
- cur++;
- continue;
-next:
- /* fast-forward to next rule */
- cur = rule + rule->rule.token_count;
- continue;
- }
-
-finish:
- if (f) {
- fflush(f);
- fchmod(fileno(f), 0644);
- if (ferror(f) || rename(path, "/run/udev/static_node-tags") < 0) {
- r = -errno;
- unlink("/run/udev/static_node-tags");
- unlink(path);
- }
- fclose(f);
- }
-
- return r;
-}
~ianmdlvl / elogind.git / blobdiff