X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev%2Fudev-rules.c;h=19ee06d3798c996a50ce2ae6b3ce6b0e9ff329c0;hp=a9793f4e8df40ca641258de30fcc3bd160c8592a;hb=b99028c96307e729303be8f6750418979a7488b9;hpb=f1128767cbc805461a8f2e54810146c562d54524 diff --git a/udev/udev-rules.c b/udev/udev-rules.c index a9793f4e8..19ee06d37 100644 --- a/udev/udev-rules.c +++ b/udev/udev-rules.c @@ -1,6 +1,5 @@ /* - * Copyright (C) 2003 Greg Kroah-Hartman - * Copyright (C) 2003-2008 Kay Sievers + * Copyright (C) 2008 Kay Sievers * * 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 @@ -29,17 +28,8 @@ #include "udev.h" -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; -}; +#define PREALLOC_TOKEN 2048 +#define PREALLOC_STRBUF 32 * 1024 enum key_operation { KEY_OP_UNSET, @@ -50,144 +40,216 @@ enum key_operation { KEY_OP_ASSIGN_FINAL, }; -struct key { - enum key_operation operation; - size_t val_off; +static const char *operation_str[] = { + [KEY_OP_MATCH] = "match", + [KEY_OP_NOMATCH] = "nomatch", + [KEY_OP_ADD] = "add", + [KEY_OP_ASSIGN] = "assign", + [KEY_OP_ASSIGN_FINAL] = "assign-final", }; -struct key_pair { - struct key key; - size_t key_name_off; +enum token_type { + TK_UNDEF, + TK_RULE, + + TK_M_WAITFOR, /* val */ + 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_SUBSYSTEM, /* val */ + TK_M_DRIVER, /* val */ + TK_M_ATTR, /* val, attr */ + + TK_M_KERNELS, /* val */ + TK_M_SUBSYSTEMS, /* val */ + TK_M_DRIVERS, /* val */ + TK_M_ATTRS, /* val, attr */ + TK_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_PARENT, /* val */ + TK_M_RESULT, /* val */ + + TK_A_IGNORE_DEVICE, + TK_A_STRING_ESCAPE_NONE, + TK_A_STRING_ESCAPE_REPLACE, + TK_A_NUM_FAKE_PART, /* 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_ENV, /* val, attr */ + TK_A_NAME, /* val */ + TK_A_DEVLINK, /* val */ + TK_A_EVENT_TIMEOUT, /* int */ + TK_A_IGNORE_REMOVE, + TK_A_ATTR, /* val, attr */ + TK_A_RUN, /* val, bool */ + TK_A_GOTO, /* size_t */ + TK_A_LAST_RULE, + + TK_END, }; -#define PAIRS_MAX 5 -struct key_pairs { - int count; - struct key_pair keys[PAIRS_MAX]; +static const char *token_str[] = { + [TK_UNDEF] = "UNDEF", + [TK_RULE] = "RULE", + + [TK_M_WAITFOR] = "M WAITFOR", + [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_SUBSYSTEM] = "M SUBSYSTEM", + [TK_M_DRIVER] = "M DRIVER", + [TK_M_ATTR] = "M ATTR", + + [TK_M_KERNELS] = "M KERNELS", + [TK_M_SUBSYSTEMS] = "M SUBSYSTEMS", + [TK_M_DRIVERS] = "M DRIVERS", + [TK_M_ATTRS] = "M ATTRS", + [TK_PARENTS_MAX] = "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_PARENT] = "M MPORT_PARENT", + [TK_M_RESULT] = "M RESULT", + + [TK_A_IGNORE_DEVICE] = "A IGNORE_DEVICE", + [TK_A_STRING_ESCAPE_NONE] = "A STRING_ESCAPE_NONE", + [TK_A_STRING_ESCAPE_REPLACE] = "A STRING_ESCAPE_REPLACE", + [TK_A_NUM_FAKE_PART] = "A NUM_FAKE_PART", + [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_MODE_ID] = "A MODE_ID", + [TK_A_ENV] = "A ENV", + [TK_A_NAME] = "A NAME", + [TK_A_DEVLINK] = "A DEVLINK", + [TK_A_EVENT_TIMEOUT] = "A EVENT_TIMEOUT", + [TK_A_IGNORE_REMOVE] = "A IGNORE_REMOVE", + [TK_A_ATTR] = "A ATTR", + [TK_A_RUN] = "A RUN", + [TK_A_GOTO] = "A GOTO", + [TK_A_LAST_RULE] = "A LAST_RULE", + + [TK_END] = "END", }; -enum import_type { - IMPORT_UNSET, - IMPORT_PROGRAM, - IMPORT_FILE, - IMPORT_PARENT, +struct token { + enum token_type type; + union { + struct { + unsigned int next_rule; + unsigned int label_off; + unsigned int filename_off; + } rule; + struct { + enum key_operation op; + unsigned int value_off; + union { + unsigned int attr_off; + int ignore_error; + int i; + unsigned int rule_goto; + mode_t mode; + uid_t uid; + gid_t gid; + int num_fake_part; + int devlink_prio; + int event_timeout; + }; + } key; + }; }; -enum escape_type { - ESCAPE_UNSET, - ESCAPE_NONE, - ESCAPE_REPLACE, +#define MAX_TK 64 +struct rule_tmp { + struct udev_rules *rules; + struct token rule; + struct token token[MAX_TK]; + unsigned int token_cur; }; -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; + int resolve_names; + struct token *tokens; + unsigned int token_cur; + unsigned int token_max; + char *buf; + size_t buf_cur; + size_t buf_max; + unsigned int buf_count; }; -static void udev_rules_iter_init(struct udev_rules_iter *iter, struct udev_rules *rules) +/* we could lookup and return existing strings, or tails of strings */ +static int add_string(struct udev_rules *rules, const char *str) { - dbg(rules->udev, "bufsize=%zi\n", rules->bufsize); - iter->rules = rules; - iter->current = 0; -} + size_t len = strlen(str)+1; + int off; -static struct udev_rule *udev_rules_iter_next(struct udev_rules_iter *iter) -{ - struct udev_rules *rules; - struct udev_rule *rule; + if (rules->buf_cur + len+1 >= rules->buf_max) { + char *buf; + unsigned int add; - rules = iter->rules; - if (!rules) - return NULL; + /* double the buffer size */ + add = rules->buf_max; + if (add < len) + add = len; - dbg(rules->udev, "current=%zi\n", iter->current); - if (iter->current >= rules->bufsize) { - dbg(rules->udev, "no more rules\n"); - return NULL; + buf = realloc(rules->buf, rules->buf_max + add); + if (buf == NULL) + return -1; + info(rules->udev, "extend buffer from %zu to %zu\n", rules->buf_max, rules->buf_max + add); + rules->buf = buf; + rules->buf_max += add; } - - /* get next rule */ - rule = (struct udev_rule *) (rules->buf + iter->current); - iter->current += sizeof(struct udev_rule) + rule->bufsize; - - return rule; + off = rules->buf_cur; + memcpy(&rules->buf[rules->buf_cur], str, len); + rules->buf_cur += len; + rules->buf_count++; + return off; } -static struct udev_rule *udev_rules_iter_goto(struct udev_rules_iter *iter, size_t rule_off) +static int add_token(struct udev_rules *rules, struct token *token) { - 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; -} + if (rules->token_cur+1 >= rules->token_max) { + struct token *tokens; + unsigned int add; -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); + /* double the buffer size */ + add = rules->token_max; + if (add < 1) + add = 1; - 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; + tokens = realloc(rules->tokens, (rules->token_max + add ) * sizeof(struct token)); + if (tokens == NULL) + return -1; + info(rules->udev, "extend tokens from %u to %u\n", rules->token_max, rules->token_max + add); + rules->tokens = tokens; + rules->token_max += add; } - - dbg(rules->udev, "found label '%s'\n", label); - return current; + memcpy(&rules->tokens[rules->token_cur], token, sizeof(struct token)); + rules->token_cur++; + return 0; } static int import_property_from_string(struct udev_device *dev, char *line) @@ -267,7 +329,7 @@ static int import_property_from_string(struct udev_device *dev, char *line) return 0; } -static int import_file_into_env(struct udev_device *dev, const char *filename) +static int import_file_into_properties(struct udev_device *dev, const char *filename) { FILE *f; char line[UTIL_LINE_SIZE]; @@ -281,7 +343,7 @@ static int import_file_into_env(struct udev_device *dev, const char *filename) return 0; } -static int import_program_into_env(struct udev_device *dev, const char *program) +static int import_program_into_properties(struct udev_device *dev, const char *program) { struct udev *udev = udev_device_get_udev(dev); char **envp; @@ -290,7 +352,7 @@ static int import_program_into_env(struct udev_device *dev, const char *program) char *line; envp = udev_device_get_properties_envp(dev); - if (run_program(udev, program, envp, result, sizeof(result), &reslen) != 0) + if (util_run_program(udev, program, envp, result, sizeof(result), &reslen) != 0) return -1; line = result; @@ -308,7 +370,7 @@ static int import_program_into_env(struct udev_device *dev, const char *program) return 0; } -static int import_parent_into_env(struct udev_device *dev, const char *filter) +static int import_parent_into_properties(struct udev_device *dev, const char *filter) { struct udev *udev = udev_device_get_udev(dev); struct udev_device *dev_parent; @@ -336,8 +398,9 @@ static int import_parent_into_env(struct udev_device *dev, const char *filter) } #define WAIT_LOOP_PER_SECOND 50 -static int wait_for_file(struct udev_event *event, const char *file, int timeout) +static int wait_for_file(struct udev_device *dev, const char *file, int timeout) { + struct udev *udev = udev_device_get_udev(dev); char filepath[UTIL_PATH_SIZE]; char devicepath[UTIL_PATH_SIZE] = ""; struct stat stats; @@ -345,8 +408,8 @@ static int wait_for_file(struct udev_event *event, const char *file, int timeout /* a relative path is a device attribute */ if (file[0] != '/') { - util_strlcpy(devicepath, udev_get_sys_path(event->udev), sizeof(devicepath)); - util_strlcat(devicepath, udev_device_get_devpath(event->dev), sizeof(devicepath)); + util_strlcpy(devicepath, udev_get_sys_path(udev), sizeof(devicepath)); + util_strlcat(devicepath, udev_device_get_devpath(dev), sizeof(devicepath)); util_strlcpy(filepath, devicepath, sizeof(filepath)); util_strlcat(filepath, "/", sizeof(filepath)); @@ -354,22 +417,22 @@ static int wait_for_file(struct udev_event *event, const char *file, int timeout file = filepath; } - dbg(event->udev, "will wait %i sec for '%s'\n", timeout, file); + dbg(udev, "will wait %i sec for '%s'\n", timeout, file); while (--loop) { /* lookup file */ if (stat(file, &stats) == 0) { - info(event->udev, "file '%s' appeared after %i loops\n", file, (timeout * WAIT_LOOP_PER_SECOND) - loop-1); + info(udev, "file '%s' appeared after %i loops\n", 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) { - info(event->udev, "device disappeared while waiting for '%s'\n", file); + info(udev, "device disappeared while waiting for '%s'\n", file); return -2; } - info(event->udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND); + info(udev, "wait for '%s' for %i mseconds\n", file, 1000 / WAIT_LOOP_PER_SECOND); usleep(1000 * 1000 / WAIT_LOOP_PER_SECOND); } - info(event->udev, "waiting for '%s' failed\n", file); + info(udev, "waiting for '%s' failed\n", file); return -1; } @@ -411,883 +474,407 @@ static int attr_subst_subdir(char *attr, size_t len) return found; } -static char *key_val(struct udev_rule *rule, struct key *key) -{ - return rule->buf + key->val_off; -} - -static char *key_pair_name(struct udev_rule *rule, struct key_pair *pair) -{ - return rule->buf + pair->key_name_off; -} - -static int match_key(struct udev *udev, const char *key_name, struct udev_rule *rule, struct key *key, const char *val) +static int get_key(struct udev *udev, char **line, char **key, enum key_operation *op, char **value) { - char value[UTIL_PATH_SIZE]; - char *key_value; - char *pos; - int match = 0; + char *linepos; + char *temp; - if (key->operation != KEY_OP_MATCH && - key->operation != KEY_OP_NOMATCH) - return 0; + linepos = *line; + if (linepos == NULL && linepos[0] == '\0') + return -1; - if (val == NULL) - val = ""; + /* skip whitespace */ + while (isspace(linepos[0]) || linepos[0] == ',') + linepos++; - /* look for a matching string, parts are separated by '|' */ - util_strlcpy(value, rule->buf + key->val_off, sizeof(value)); - key_value = value; - dbg(udev, "key %s value='%s'\n", key_name, key_value); - while (key_value != NULL) { - pos = strchr(key_value, '|'); - if (pos != NULL) { - pos[0] = '\0'; - pos = &pos[1]; - } + /* get the key */ + if (linepos[0] == '\0') + return -1; + *key = linepos; - dbg(udev, "match %s '%s' <-> '%s'\n", key_name, key_value, val); - match = (fnmatch(key_value, val, 0) == 0); - if (match) + while (1) { + linepos++; + if (linepos[0] == '\0') + return -1; + if (isspace(linepos[0])) break; - - key_value = pos; - } - - if (match && (key->operation == KEY_OP_MATCH)) { - dbg(udev, "%s is true (matching value)\n", key_name); - return 0; - } - if (!match && (key->operation == KEY_OP_NOMATCH)) { - dbg(udev, "%s is true (non-matching value)\n", key_name); - return 0; - } - return -1; -} - -/* match a single rule against a given device and possibly its parent devices */ -static int match_rule(struct udev_event *event, struct udev_rule *rule) -{ - struct udev_device *dev = event->dev; - int i; - - if (match_key(event->udev, "ACTION", rule, &rule->action, udev_device_get_action(dev))) - goto nomatch; - - if (match_key(event->udev, "KERNEL", rule, &rule->kernel, udev_device_get_sysname(dev))) - goto nomatch; - - if (match_key(event->udev, "SUBSYSTEM", rule, &rule->subsystem, udev_device_get_subsystem(dev))) - goto nomatch; - - if (match_key(event->udev, "DEVPATH", rule, &rule->devpath, udev_device_get_devpath(dev))) - goto nomatch; - - if (match_key(event->udev, "DRIVER", rule, &rule->driver, udev_device_get_driver(dev))) - goto nomatch; - - /* match NAME against a value assigned by an earlier rule */ - if (match_key(event->udev, "NAME", rule, &rule->name, event->name)) - goto nomatch; - - /* match against current list of symlinks */ - if (rule->symlink_match.operation == KEY_OP_MATCH || - rule->symlink_match.operation == KEY_OP_NOMATCH) { - size_t devlen = strlen(udev_get_dev_path(event->udev))+1; - struct udev_list_entry *list_entry; - int match = 0; - - udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(dev)) { - const char *devlink; - - devlink = &udev_list_entry_get_name(list_entry)[devlen]; - if (match_key(event->udev, "SYMLINK", rule, &rule->symlink_match, devlink) == 0) { - match = 1; + if (linepos[0] == '=') + break; + if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':')) + if (linepos[1] == '=') break; - } - } - if (!match) - goto nomatch; - } - - for (i = 0; i < rule->env.count; i++) { - struct key_pair *pair = &rule->env.keys[i]; - - /* we only check for matches, assignments will be handled later */ - if (pair->key.operation == KEY_OP_MATCH || - pair->key.operation == KEY_OP_NOMATCH) { - struct udev_list_entry *list_entry; - const char *key_name = key_pair_name(rule, pair); - const char *value; - - list_entry = udev_device_get_properties_list_entry(event->dev); - list_entry = udev_list_entry_get_by_name(list_entry, key_name); - value = udev_list_entry_get_value(list_entry); - if (value == NULL) { - dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name); - value = ""; - } - if (match_key(event->udev, "ENV", rule, &pair->key, value)) - goto nomatch; - } - } - - if (rule->test.operation == KEY_OP_MATCH || - rule->test.operation == KEY_OP_NOMATCH) { - char filename[UTIL_PATH_SIZE]; - struct stat statbuf; - int match; - - util_strlcpy(filename, key_val(rule, &rule->test), sizeof(filename)); - udev_event_apply_format(event, filename, sizeof(filename)); - if (udev_event_apply_subsys_kernel(event, NULL, filename, sizeof(filename), 0) != 0) - if (filename[0] != '/') { - char tmp[UTIL_PATH_SIZE]; - - util_strlcpy(tmp, udev_device_get_syspath(dev), sizeof(tmp)); - util_strlcat(tmp, "/", sizeof(tmp)); - util_strlcat(tmp, filename, sizeof(tmp)); - util_strlcpy(filename, tmp, sizeof(filename)); - } - - attr_subst_subdir(filename, sizeof(filename)); - - match = (stat(filename, &statbuf) == 0); - info(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n"); - if (match && rule->test_mode_mask > 0) { - match = ((statbuf.st_mode & rule->test_mode_mask) > 0); - info(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode, - match ? "matches" : "does not match", - rule->test_mode_mask); - } - if (match && rule->test.operation == KEY_OP_NOMATCH) - goto nomatch; - if (!match && rule->test.operation == KEY_OP_MATCH) - goto nomatch; - dbg(event->udev, "TEST key is true\n"); } - if (rule->wait_for.operation != KEY_OP_UNSET) { - char filename[UTIL_PATH_SIZE]; - int found; + /* remember end of key */ + temp = linepos; - util_strlcpy(filename, key_val(rule, &rule->wait_for), sizeof(filename)); - udev_event_apply_format(event, filename, sizeof(filename)); - found = (wait_for_file(event, filename, 10) == 0); - if (!found && (rule->wait_for.operation != KEY_OP_NOMATCH)) - goto nomatch; - } + /* skip whitespace after key */ + while (isspace(linepos[0])) + linepos++; + if (linepos[0] == '\0') + return -1; - /* check for matching sysfs attribute pairs */ - for (i = 0; i < rule->attr.count; i++) { - struct key_pair *pair = &rule->attr.keys[i]; + /* get operation type */ + if (linepos[0] == '=' && linepos[1] == '=') { + *op = KEY_OP_MATCH; + linepos += 2; + } else if (linepos[0] == '!' && linepos[1] == '=') { + *op = KEY_OP_NOMATCH; + linepos += 2; + } else if (linepos[0] == '+' && linepos[1] == '=') { + *op = KEY_OP_ADD; + linepos += 2; + } else if (linepos[0] == '=') { + *op = KEY_OP_ASSIGN; + linepos++; + } else if (linepos[0] == ':' && linepos[1] == '=') { + *op = KEY_OP_ASSIGN_FINAL; + linepos += 2; + } else + return -1; - if (pair->key.operation == KEY_OP_MATCH || - pair->key.operation == KEY_OP_NOMATCH) { - char attr[UTIL_PATH_SIZE]; - const char *key_name = key_pair_name(rule, pair); - const char *key_value = key_val(rule, &pair->key); - char value[UTIL_NAME_SIZE] = ""; - size_t len; + /* terminate key */ + temp[0] = '\0'; - util_strlcpy(attr, key_name, sizeof(attr)); - udev_event_apply_subsys_kernel(event, attr, value, sizeof(value), 1); + /* skip whitespace after operator */ + while (isspace(linepos[0])) + linepos++; + if (linepos[0] == '\0') + return -1; - if (value[0]=='\0') { - const char *val; + /* get the value*/ + if (linepos[0] == '"') + linepos++; + else + return -1; + *value = linepos; - val = udev_device_get_attr_value(dev, key_name); - if (val != NULL) - util_strlcpy(value, val, sizeof(value)); - } + temp = strchr(linepos, '"'); + if (!temp) + return -1; + temp[0] = '\0'; + temp++; + dbg(udev, "%s '%s'-'%s'\n", operation_str[*op], *key, *value); - if (value[0]=='\0') - goto nomatch; + /* move line to next key */ + *line = temp; + return 0; +} - /* strip trailing whitespace of value, if not asked to match for it */ - len = strlen(key_value); - if (len > 0 && !isspace(key_value[len-1])) { - len = strlen(value); - while (len > 0 && isspace(value[--len])) - value[len] = '\0'; - dbg(event->udev, "removed trailing whitespace from '%s'\n", value); - } +/* extract possible KEY{attr} */ +static char *get_key_attribute(struct udev *udev, char *str) +{ + char *pos; + char *attr; - if (match_key(event->udev, "ATTR", rule, &pair->key, value)) - goto nomatch; + attr = strchr(str, '{'); + if (attr != NULL) { + attr++; + pos = strchr(attr, '}'); + if (pos == NULL) { + err(udev, "missing closing brace for format\n"); + return NULL; } + pos[0] = '\0'; + dbg(udev, "attribute='%s'\n", attr); + return attr; } + return NULL; +} - /* walk up the chain of parent devices and find a match */ - event->dev_parent = dev; - while (1) { - /* check for matching kernel device name */ - if (match_key(event->udev, "KERNELS", rule, - &rule->kernels, udev_device_get_sysname(event->dev_parent))) - goto try_parent; - - /* check for matching subsystem value */ - if (match_key(event->udev, "SUBSYSTEMS", rule, - &rule->subsystems, udev_device_get_subsystem(event->dev_parent))) - goto try_parent; - - /* check for matching driver */ - if (match_key(event->udev, "DRIVERS", rule, - &rule->drivers, udev_device_get_driver(event->dev_parent))) - goto try_parent; - - /* check for matching sysfs attribute pairs */ - for (i = 0; i < rule->attrs.count; i++) { - struct key_pair *pair = &rule->attrs.keys[i]; - - if (pair->key.operation == KEY_OP_MATCH || - pair->key.operation == KEY_OP_NOMATCH) { - const char *key_name = key_pair_name(rule, pair); - const char *key_value = key_val(rule, &pair->key); - const char *val; - char value[UTIL_NAME_SIZE]; - size_t len; - - val = udev_device_get_attr_value(event->dev_parent, key_name); - if (val == NULL) - val = udev_device_get_attr_value(dev, key_name); - if (val == NULL) - goto try_parent; - util_strlcpy(value, val, sizeof(value)); - - /* strip trailing whitespace of value, if not asked to match for it */ - len = strlen(key_value); - if (len > 0 && !isspace(key_value[len-1])) { - len = strlen(value); - while (len > 0 && isspace(value[--len])) - value[len] = '\0'; - dbg(event->udev, "removed trailing whitespace from '%s'\n", value); - } - - if (match_key(event->udev, "ATTRS", rule, &pair->key, value)) - goto try_parent; - } - } - - /* found matching device */ +static int rule_add_token(struct rule_tmp *rule_tmp, enum token_type type, + enum key_operation op, + const char *value, const void *data) +{ + struct token *token = &rule_tmp->token[rule_tmp->token_cur]; + const char *attr = data; + mode_t mode = 0000; + + switch (type) { + case TK_M_WAITFOR: + case TK_M_ACTION: + case TK_M_DEVPATH: + case TK_M_KERNEL: + case TK_M_SUBSYSTEM: + case TK_M_DRIVER: + case TK_M_DEVLINK: + case TK_M_NAME: + case TK_M_KERNELS: + case TK_M_SUBSYSTEMS: + case TK_M_DRIVERS: + case TK_M_PROGRAM: + case TK_M_IMPORT_FILE: + case TK_M_IMPORT_PROG: + case TK_M_IMPORT_PARENT: + case TK_M_RESULT: + case TK_A_OWNER: + case TK_A_GROUP: + case TK_A_MODE: + case TK_A_NAME: + case TK_A_DEVLINK: + case TK_A_GOTO: + token->key.value_off = add_string(rule_tmp->rules, value); break; -try_parent: - /* move to parent device */ - dbg(event->udev, "try parent sysfs device\n"); - event->dev_parent = udev_device_get_parent(event->dev_parent); - if (event->dev_parent == NULL) - goto nomatch; - dbg(event->udev, "looking at dev_parent->devpath='%s'\n", - udev_device_get_syspath(event->dev_parent)); + case TK_M_ENV: + case TK_M_ATTR: + case TK_M_ATTRS: + case TK_A_ATTR: + case TK_A_ENV: + token->key.value_off = add_string(rule_tmp->rules, value); + token->key.attr_off = add_string(rule_tmp->rules, attr); + break; + case TK_M_TEST: + if (data != NULL) + mode = *(mode_t *)data; + token->key.value_off = add_string(rule_tmp->rules, value); + token->key.mode = mode; + break; + case TK_A_IGNORE_DEVICE: + case TK_A_STRING_ESCAPE_NONE: + case TK_A_STRING_ESCAPE_REPLACE: + case TK_A_IGNORE_REMOVE: + case TK_A_LAST_RULE: + break; + case TK_A_RUN: + token->key.value_off = add_string(rule_tmp->rules, value); + token->key.ignore_error = *(int *)data; + break; + case TK_A_NUM_FAKE_PART: + token->key.num_fake_part = *(int *)data; + break; + 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_A_EVENT_TIMEOUT: + token->key.event_timeout = *(int *)data; + break; + case TK_RULE: + case TK_PARENTS_MAX: + case TK_END: + case TK_UNDEF: + err(rule_tmp->rules->udev, "wrong type %u\n", type); + return -1; } - - /* execute external program */ - if (rule->program.operation != KEY_OP_UNSET) { - char program[UTIL_PATH_SIZE]; - char **envp; - char result[UTIL_PATH_SIZE]; - - util_strlcpy(program, key_val(rule, &rule->program), sizeof(program)); - udev_event_apply_format(event, program, sizeof(program)); - envp = udev_device_get_properties_envp(dev); - if (run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) { - dbg(event->udev, "PROGRAM is false\n"); - event->program_result[0] = '\0'; - if (rule->program.operation != KEY_OP_NOMATCH) - goto nomatch; - } else { - int count; - - dbg(event->udev, "PROGRAM matches\n"); - util_remove_trailing_chars(result, '\n'); - if (rule->string_escape == ESCAPE_UNSET || - rule->string_escape == ESCAPE_REPLACE) { - count = util_replace_chars(result, ALLOWED_CHARS_INPUT); - if (count > 0) - info(event->udev, "%i character(s) replaced\n" , count); - } - dbg(event->udev, "result is '%s'\n", result); - util_strlcpy(event->program_result, result, sizeof(event->program_result)); - dbg(event->udev, "PROGRAM returned successful\n"); - if (rule->program.operation == KEY_OP_NOMATCH) - goto nomatch; - } - dbg(event->udev, "PROGRAM key is true\n"); + token->type = type; + token->key.op = op; + rule_tmp->token_cur++; + if (rule_tmp->token_cur >= ARRAY_SIZE(rule_tmp->token)) { + err(rule_tmp->rules->udev, "temporary rule array too small\n"); + return -1; } + return 0; +} - /* check for matching result of external program */ - if (match_key(event->udev, "RESULT", rule, &rule->result, event->program_result)) - goto nomatch; - - /* 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; - - util_strlcpy(import, key_val(rule, &rule->import), sizeof(import)); - udev_event_apply_format(event, import, sizeof(import)); - dbg(event->udev, "check for IMPORT import='%s'\n", import); - if (rule->import_type == IMPORT_PROGRAM) { - rc = import_program_into_env(event->dev, import); - } else if (rule->import_type == IMPORT_FILE) { - dbg(event->udev, "import file import='%s'\n", import); - rc = import_file_into_env(event->dev, import); - } else if (rule->import_type == IMPORT_PARENT) { - dbg(event->udev, "import parent import='%s'\n", import); - rc = import_parent_into_env(event->dev, import); +#ifdef DEBUG +static void dump_token(struct udev_rules *rules, struct token *token) +{ + enum token_type type = token->type; + enum key_operation op = token->key.op; + const char *value = &rules->buf[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 off = tk_ptr - tks_ptr; + + dbg(rules->udev, "* RULE '%s', off: %u(%u), next: %u, label: '%s'\n", + &rules->buf[token->rule.filename_off], + off / (unsigned int) sizeof(struct token), off, + token->rule.next_rule, + &rules->buf[token->rule.label_off]); + break; } - if (rc != 0) { - dbg(event->udev, "IMPORT failed\n"); - if (rule->import.operation != KEY_OP_NOMATCH) - goto nomatch; - } else - dbg(event->udev, "IMPORT '%s' imported\n", key_val(rule, &rule->import)); - dbg(event->udev, "IMPORT key is true\n"); + case TK_M_WAITFOR: + case TK_M_ACTION: + case TK_M_DEVPATH: + case TK_M_KERNEL: + case TK_M_SUBSYSTEM: + case TK_M_DRIVER: + case TK_M_DEVLINK: + case TK_M_NAME: + case TK_M_KERNELS: + case TK_M_SUBSYSTEMS: + case TK_M_DRIVERS: + case TK_M_PROGRAM: + case TK_M_IMPORT_FILE: + case TK_M_IMPORT_PROG: + 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: + dbg(rules->udev, "%s %s '%s'\n", token_str[type], operation_str[op], value); + break; + case TK_M_ATTR: + case TK_M_ATTRS: + case TK_M_ENV: + case TK_A_ATTR: + case TK_A_ENV: + dbg(rules->udev, "%s %s '%s' '%s'\n", token_str[type], operation_str[op], attr, value); + break; + case TK_A_IGNORE_DEVICE: + case TK_A_STRING_ESCAPE_NONE: + case TK_A_STRING_ESCAPE_REPLACE: + case TK_A_LAST_RULE: + case TK_A_IGNORE_REMOVE: + dbg(rules->udev, "%s\n", token_str[type]); + break; + case TK_M_TEST: + dbg(rules->udev, "%s %s '%s' %#o\n", token_str[type], operation_str[op], value, token->key.mode); + break; + case TK_A_NUM_FAKE_PART: + dbg(rules->udev, "%s %u\n", token_str[type], token->key.num_fake_part); + break; + case TK_A_DEVLINK_PRIO: + dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.devlink_prio); + break; + case TK_A_OWNER_ID: + dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.uid); + break; + case TK_A_GROUP_ID: + dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.gid); + break; + case TK_A_MODE_ID: + dbg(rules->udev, "%s %s %#o\n", token_str[type], operation_str[op], token->key.mode); + break; + case TK_A_EVENT_TIMEOUT: + dbg(rules->udev, "%s %s %u\n", token_str[type], operation_str[op], token->key.event_timeout); + break; + case TK_A_GOTO: + dbg(rules->udev, "%s '%s' %u\n", token_str[type], value, token->key.rule_goto); + break; + case TK_END: + dbg(rules->udev, "* %s\n", token_str[type]); + break; + case TK_PARENTS_MAX: + case TK_UNDEF: + dbg(rules->udev, "unknown type %u\n", type); + break; } +} - /* rule matches, if we have ENV assignments export it */ - for (i = 0; i < rule->env.count; i++) { - struct key_pair *pair = &rule->env.keys[i]; - - if (pair->key.operation == KEY_OP_ASSIGN) { - char temp_value[UTIL_NAME_SIZE]; - const char *key_name = key_pair_name(rule, pair); - const char *value = key_val(rule, &pair->key); - - /* make sure we don't write to the same string we possibly read from */ - util_strlcpy(temp_value, value, sizeof(temp_value)); - udev_event_apply_format(event, temp_value, sizeof(temp_value)); - - if (temp_value[0] != '\0') { - struct udev_list_entry *entry; +static void dump_rules(struct udev_rules *rules) +{ + unsigned int i; + + dbg(rules->udev, "dumping %u (%zu bytes) tokens, %u (%zu bytes) strings\n", + 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 */ - info(event->udev, "set ENV '%s=%s'\n", key_name, temp_value); - entry = udev_device_add_property(dev, key_name, temp_value); - /* store in db */ - udev_list_entry_set_flag(entry, 1); +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_UNDEF; + unsigned int next_idx; + unsigned int j; + + /* find smallest value */ + for (j = start; j < end; j++) { + if (rule_tmp->token[j].type == TK_UNDEF) + continue; + if (next_val == TK_UNDEF || rule_tmp->token[j].type < next_val) { + next_val = rule_tmp->token[j].type; + next_idx = j; } } - } - /* if we have ATTR assignments, write value to sysfs file */ - for (i = 0; i < rule->attr.count; i++) { - struct key_pair *pair = &rule->attr.keys[i]; - - if (pair->key.operation == KEY_OP_ASSIGN) { - const char *key_name = key_pair_name(rule, pair); - char attr[UTIL_PATH_SIZE]; - char value[UTIL_NAME_SIZE]; - FILE *f; - - util_strlcpy(attr, key_name, sizeof(attr)); - if (udev_event_apply_subsys_kernel(event, key_name, attr, sizeof(attr), 0) != 0) { - util_strlcpy(attr, udev_device_get_syspath(dev), sizeof(attr)); - util_strlcat(attr, "/", sizeof(attr)); - util_strlcat(attr, key_name, sizeof(attr)); - } + /* add token and mark done */ + if (add_token(rules, &rule_tmp->token[next_idx]) != 0) + return -1; + rule_tmp->token[next_idx].type = TK_UNDEF; - attr_subst_subdir(attr, sizeof(attr)); - - util_strlcpy(value, key_val(rule, &pair->key), sizeof(value)); - udev_event_apply_format(event, value, sizeof(value)); - info(event->udev, "writing '%s' to sysfs file '%s'\n", value, attr); - f = fopen(attr, "w"); - if (f != NULL) { - if (!event->test) - if (fprintf(f, "%s", value) <= 0) - err(event->udev, "error writing ATTR{%s}: %m\n", attr); - fclose(f); - } else - err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr); - } + /* shrink range */ + if (next_idx == start) + start++; + if (next_idx+1 == end) + end--; } return 0; - -nomatch: - return -1; } -int udev_rules_get_name(struct udev_rules *rules, struct udev_event *event) +static int add_rule(struct udev_rules *rules, char *line, + const char *filename, unsigned int filename_off, unsigned int lineno) { - struct udev_device *dev = event->dev; - struct udev_rules_iter iter; - struct udev_rule *rule; - int name_set = 0; + int valid = 0; + char *linepos; + char *attr; + int physdev = 0; + struct rule_tmp rule_tmp; - dbg(event->udev, "device: '%s'\n", udev_device_get_syspath(dev)); + memset(&rule_tmp, 0x00, sizeof(struct rule_tmp)); + rule_tmp.rules = rules; + rule_tmp.rule.type = TK_RULE; + rule_tmp.rule.rule.filename_off = filename_off; - /* look for a matching rule to apply */ - udev_rules_iter_init(&iter, rules); + linepos = line; while (1) { - rule = udev_rules_iter_next(&iter); - if (rule == NULL) + char *key; + char *value; + enum key_operation op = KEY_OP_UNSET; + + if (get_key(rules->udev, &linepos, &key, &op, &value) != 0) break; - if (name_set && - (rule->name.operation == KEY_OP_ASSIGN || - rule->name.operation == KEY_OP_ASSIGN_FINAL || - rule->name.operation == KEY_OP_ADD)) { - dbg(event->udev, "node name already set, rule ignored\n"); + if (strcasecmp(key, "ACTION") == 0) { + if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) { + err(rules->udev, "invalid ACTION operation\n"); + goto invalid; + } + rule_add_token(&rule_tmp, TK_M_ACTION, op, value, NULL); + valid = 1; continue; } - dbg(event->udev, "process rule\n"); - if (match_rule(event, rule) == 0) { - /* apply options */ - if (rule->ignore_device) { - info(event->udev, "rule applied, '%s' is ignored\n", udev_device_get_sysname(dev)); - event->ignore_device = 1; - return 0; - } - if (rule->ignore_remove) { - udev_device_set_ignore_remove(dev, 1); - dbg(event->udev, "remove event should be ignored\n"); - } - if (rule->link_priority != 0) { - udev_device_set_devlink_priority(dev, rule->link_priority); - info(event->udev, "devlink_priority=%i\n", rule->link_priority); - } - if (rule->event_timeout >= 0) { - udev_device_set_event_timeout(dev, rule->event_timeout); - info(event->udev, "event_timeout=%i\n", rule->event_timeout); - } - /* apply all_partitions option only at a disk device */ - if (rule->partitions > 0 && - strcmp(udev_device_get_subsystem(dev), "block") == 0 && - udev_device_get_sysnum(dev) == NULL) { - udev_device_set_num_fake_partitions(dev, rule->partitions); - dbg(event->udev, "creation of partition nodes requested\n"); + if (strcasecmp(key, "DEVPATH") == 0) { + if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) { + err(rules->udev, "invalid DEVPATH operation\n"); + goto invalid; } - - /* apply permissions */ - if (!event->mode_final && rule->mode.operation != KEY_OP_UNSET) { - if (rule->mode.operation == KEY_OP_ASSIGN_FINAL) - event->mode_final = 1; - char buf[20]; - util_strlcpy(buf, key_val(rule, &rule->mode), sizeof(buf)); - udev_event_apply_format(event, buf, sizeof(buf)); - event->mode = strtol(buf, NULL, 8); - dbg(event->udev, "applied mode=%#o to '%s'\n", - event->mode, udev_device_get_sysname(dev)); - } - if (!event->owner_final && rule->owner.operation != KEY_OP_UNSET) { - if (rule->owner.operation == KEY_OP_ASSIGN_FINAL) - event->owner_final = 1; - util_strlcpy(event->owner, key_val(rule, &rule->owner), sizeof(event->owner)); - udev_event_apply_format(event, event->owner, sizeof(event->owner)); - dbg(event->udev, "applied owner='%s' to '%s'\n", - event->owner, udev_device_get_sysname(dev)); - } - if (!event->group_final && rule->group.operation != KEY_OP_UNSET) { - if (rule->group.operation == KEY_OP_ASSIGN_FINAL) - event->group_final = 1; - util_strlcpy(event->group, key_val(rule, &rule->group), sizeof(event->group)); - udev_event_apply_format(event, event->group, sizeof(event->group)); - dbg(event->udev, "applied group='%s' to '%s'\n", - event->group, udev_device_get_sysname(dev)); - } - - /* collect symlinks */ - if (!event->devlink_final && - (rule->symlink.operation == KEY_OP_ASSIGN || - rule->symlink.operation == KEY_OP_ASSIGN_FINAL || - rule->symlink.operation == KEY_OP_ADD)) { - char temp[UTIL_PATH_SIZE]; - char filename[UTIL_PATH_SIZE]; - char *pos, *next; - int count = 0; - - if (rule->symlink.operation == KEY_OP_ASSIGN_FINAL) - event->devlink_final = 1; - if (rule->symlink.operation == KEY_OP_ASSIGN || - rule->symlink.operation == KEY_OP_ASSIGN_FINAL) { - info(event->udev, "reset symlink list\n"); - udev_device_cleanup_devlinks_list(dev); - } - /* allow multiple symlinks separated by spaces */ - util_strlcpy(temp, key_val(rule, &rule->symlink), sizeof(temp)); - udev_event_apply_format(event, temp, sizeof(temp)); - if (rule->string_escape == ESCAPE_UNSET) - count = util_replace_chars(temp, ALLOWED_CHARS_FILE " "); - else if (rule->string_escape == ESCAPE_REPLACE) - count = util_replace_chars(temp, ALLOWED_CHARS_FILE); - if (count > 0) - info(event->udev, "%i character(s) replaced\n" , count); - dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp); - pos = temp; - while (isspace(pos[0])) - pos++; - next = strchr(pos, ' '); - while (next) { - next[0] = '\0'; - info(event->udev, "add symlink '%s'\n", pos); - util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename)); - util_strlcat(filename, "/", sizeof(filename)); - util_strlcat(filename, pos, sizeof(filename)); - udev_device_add_devlink(dev, filename); - while (isspace(next[1])) - next++; - pos = &next[1]; - next = strchr(pos, ' '); - } - if (pos[0] != '\0') { - info(event->udev, "add symlink '%s'\n", pos); - util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename)); - util_strlcat(filename, "/", sizeof(filename)); - util_strlcat(filename, pos, sizeof(filename)); - udev_device_add_devlink(dev, filename); - } - } - - /* set name, later rules with name set will be ignored */ - if (rule->name.operation == KEY_OP_ASSIGN || - rule->name.operation == KEY_OP_ASSIGN_FINAL || - rule->name.operation == KEY_OP_ADD) { - int count; - - name_set = 1; - util_strlcpy(event->name, key_val(rule, &rule->name), sizeof(event->name)); - udev_event_apply_format(event, event->name, sizeof(event->name)); - if (rule->string_escape == ESCAPE_UNSET || - rule->string_escape == ESCAPE_REPLACE) { - count = util_replace_chars(event->name, ALLOWED_CHARS_FILE); - if (count > 0) - info(event->udev, "%i character(s) replaced\n", count); - } - - info(event->udev, "rule applied, '%s' becomes '%s'\n", - udev_device_get_sysname(dev), event->name); - if (strcmp(udev_device_get_subsystem(dev), "net") != 0) - dbg(event->udev, "'%s' owner='%s', group='%s', mode=%#o partitions=%i\n", - event->name, event->owner, event->group, event->mode, - udev_device_get_num_fake_partitions(dev)); - } - - if (!event->run_final && rule->run.operation != KEY_OP_UNSET) { - struct udev_list_entry *list_entry; - - if (rule->run.operation == KEY_OP_ASSIGN_FINAL) - event->run_final = 1; - if (rule->run.operation == KEY_OP_ASSIGN || rule->run.operation == KEY_OP_ASSIGN_FINAL) { - info(event->udev, "reset run list\n"); - udev_list_cleanup(event->udev, &event->run_list); - } - dbg(event->udev, "add run '%s'\n", key_val(rule, &rule->run)); - list_entry = udev_list_entry_add(event->udev, &event->run_list, - key_val(rule, &rule->run), NULL, 1, 0); - if (rule->run_ignore_error && list_entry != NULL) - udev_list_entry_set_flag(list_entry, 1); - } - - if (rule->last_rule) { - dbg(event->udev, "last rule to be applied\n"); - break; - } - - if (rule->goto_label.operation != KEY_OP_UNSET) { - dbg(event->udev, "moving forward to label '%s'\n", key_val(rule, &rule->goto_label)); - udev_rules_iter_goto(&iter, rule->goto_rule_off); - } - } - } - - if (!name_set) { - info(event->udev, "no node name set, will use kernel name '%s'\n", - udev_device_get_sysname(dev)); - util_strlcpy(event->name, udev_device_get_sysname(dev), sizeof(event->name)); - } - - if (event->tmp_node[0] != '\0') { - dbg(event->udev, "removing temporary device node\n"); - unlink_secure(event->udev, event->tmp_node); - event->tmp_node[0] = '\0'; - } - return 0; -} - -int udev_rules_get_run(struct udev_rules *rules, struct udev_event *event) -{ - struct udev_device *dev = event->dev; - struct udev_rules_iter iter; - struct udev_rule *rule; - - dbg(event->udev, "sysname: '%s'\n", udev_device_get_sysname(dev)); - - /* look for a matching rule to apply */ - udev_rules_iter_init(&iter, rules); - while (1) { - rule = udev_rules_iter_next(&iter); - if (rule == NULL) - break; - - dbg(event->udev, "process rule\n"); - if (rule->name.operation == KEY_OP_ASSIGN || - rule->name.operation == KEY_OP_ASSIGN_FINAL || - rule->name.operation == KEY_OP_ADD || - rule->symlink.operation == KEY_OP_ASSIGN || - rule->symlink.operation == KEY_OP_ASSIGN_FINAL || - rule->symlink.operation == KEY_OP_ADD || - rule->mode.operation != KEY_OP_UNSET || - rule->owner.operation != KEY_OP_UNSET || rule->group.operation != KEY_OP_UNSET) { - dbg(event->udev, "skip rule that names a device\n"); - continue; - } - - if (match_rule(event, rule) == 0) { - if (rule->ignore_device) { - info(event->udev, "rule applied, '%s' is ignored\n", udev_device_get_sysname(dev)); - event->ignore_device = 1; - return 0; - } - if (rule->ignore_remove) { - udev_device_set_ignore_remove(dev, 1); - dbg(event->udev, "remove event should be ignored\n"); - } - - if (!event->run_final && rule->run.operation != KEY_OP_UNSET) { - struct udev_list_entry *list_entry; - - if (rule->run.operation == KEY_OP_ASSIGN || - rule->run.operation == KEY_OP_ASSIGN_FINAL) { - info(event->udev, "reset run list\n"); - udev_list_cleanup(event->udev, &event->run_list); - } - dbg(event->udev, "add run '%s'\n", key_val(rule, &rule->run)); - list_entry = udev_list_entry_add(event->udev, &event->run_list, - key_val(rule, &rule->run), NULL, 1, 0); - if (rule->run_ignore_error && list_entry != NULL) - udev_list_entry_set_flag(list_entry, 1); - if (rule->run.operation == KEY_OP_ASSIGN_FINAL) - break; - } - - if (rule->last_rule) { - dbg(event->udev, "last rule to be applied\n"); - break; - } - - if (rule->goto_label.operation != KEY_OP_UNSET) { - dbg(event->udev, "moving forward to label '%s'\n", key_val(rule, &rule->goto_label)); - udev_rules_iter_goto(&iter, rule->goto_rule_off); - } - } - } - - 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; - - 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; - - if (get_key(rules, &linepos, &key, &operation, &value) != 0) - 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; - } + rule_add_token(&rule_tmp, TK_M_DEVPATH, op, value, NULL); + valid = 1; + continue; + } if (strcasecmp(key, "KERNEL") == 0) { - if (operation != KEY_OP_MATCH && - operation != KEY_OP_NOMATCH) { + if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) { err(rules->udev, "invalid KERNEL operation\n"); goto invalid; } - add_rule_key(rule, &rule->kernel, operation, value); + rule_add_token(&rule_tmp, TK_M_KERNEL, op, value, NULL); valid = 1; continue; } if (strcasecmp(key, "SUBSYSTEM") == 0) { - if (operation != KEY_OP_MATCH && - operation != KEY_OP_NOMATCH) { + if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) { err(rules->udev, "invalid SUBSYSTEM operation\n"); goto invalid; } @@ -1298,79 +885,77 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena 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"); + rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL); } else - add_rule_key(rule, &rule->subsystem, operation, value); + rule_add_token(&rule_tmp, TK_M_SUBSYSTEM, op, value, NULL); valid = 1; continue; } if (strcasecmp(key, "DRIVER") == 0) { - if (operation != KEY_OP_MATCH && - operation != KEY_OP_NOMATCH) { + if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) { err(rules->udev, "invalid DRIVER operation\n"); goto invalid; } - add_rule_key(rule, &rule->driver, operation, value); + rule_add_token(&rule_tmp, TK_M_DRIVER, op, value, NULL); valid = 1; continue; } if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) { - attr = get_key_attribute(rules, key + sizeof("ATTR")-1); + attr = get_key_attribute(rules->udev, 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; + if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) { + rule_add_token(&rule_tmp, TK_M_ATTR, op, value, attr); + } else { + rule_add_token(&rule_tmp, TK_A_ATTR, op, value, attr); + } valid = 1; continue; } if (strcasecmp(key, "KERNELS") == 0 || strcasecmp(key, "ID") == 0) { - if (operation != KEY_OP_MATCH && - operation != KEY_OP_NOMATCH) { + if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) { err(rules->udev, "invalid KERNELS operation\n"); goto invalid; } - add_rule_key(rule, &rule->kernels, operation, value); + rule_add_token(&rule_tmp, TK_M_KERNELS, op, value, NULL); valid = 1; continue; } if (strcasecmp(key, "SUBSYSTEMS") == 0 || strcasecmp(key, "BUS") == 0) { - if (operation != KEY_OP_MATCH && - operation != KEY_OP_NOMATCH) { + if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) { err(rules->udev, "invalid SUBSYSTEMS operation\n"); goto invalid; } - add_rule_key(rule, &rule->subsystems, operation, value); + rule_add_token(&rule_tmp, TK_M_SUBSYSTEMS, op, value, NULL); valid = 1; continue; } if (strcasecmp(key, "DRIVERS") == 0) { - if (operation != KEY_OP_MATCH && - operation != KEY_OP_NOMATCH) { + if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) { err(rules->udev, "invalid DRIVERS operation\n"); goto invalid; } - add_rule_key(rule, &rule->drivers, operation, value); + rule_add_token(&rule_tmp, TK_M_DRIVERS, op, value, NULL); 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) { + if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) { err(rules->udev, "invalid ATTRS operation\n"); goto invalid; } - attr = get_key_attribute(rules, key + sizeof("ATTRS")-1); + attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1); if (attr == NULL) { err(rules->udev, "error parsing ATTRS attribute\n"); goto invalid; @@ -1381,54 +966,60 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena 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; + rule_add_token(&rule_tmp, TK_M_ATTRS, op, value, attr); valid = 1; continue; } if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) { - attr = get_key_attribute(rules, key + sizeof("ENV")-1); + attr = get_key_attribute(rules->udev, 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; + if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) { + if (rule_add_token(&rule_tmp, TK_M_ENV, op, value, attr) != 0) + goto invalid; + } else { + if (rule_add_token(&rule_tmp, TK_A_ENV, op, value, attr) != 0) + goto invalid; + } valid = 1; continue; } if (strcasecmp(key, "PROGRAM") == 0) { - add_rule_key(rule, &rule->program, operation, value); + rule_add_token(&rule_tmp, TK_M_PROGRAM, op, value, NULL); valid = 1; continue; } if (strcasecmp(key, "RESULT") == 0) { - if (operation != KEY_OP_MATCH && - operation != KEY_OP_NOMATCH) { + if (op != KEY_OP_MATCH && op != KEY_OP_NOMATCH) { err(rules->udev, "invalid RESULT operation\n"); goto invalid; } - add_rule_key(rule, &rule->result, operation, value); + rule_add_token(&rule_tmp, TK_M_RESULT, op, value, NULL); valid = 1; continue; } if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) { - attr = get_key_attribute(rules, key + sizeof("IMPORT")-1); + attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1); if (attr != NULL && strstr(attr, "program")) { dbg(rules->udev, "IMPORT will be executed\n"); - rule->import_type = IMPORT_PROGRAM; + rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL); + valid = 1; } else if (attr != NULL && strstr(attr, "file")) { dbg(rules->udev, "IMPORT will be included as file\n"); - rule->import_type = IMPORT_FILE; + rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL); + valid = 1; } else if (attr != NULL && strstr(attr, "parent")) { dbg(rules->udev, "IMPORT will include the parent values\n"); - rule->import_type = IMPORT_PARENT; + rule_add_token(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL); + valid = 1; } else { /* figure it out if it is executable */ char file[UTIL_PATH_SIZE]; @@ -1451,129 +1042,141 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena 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; + dbg(rules->udev, "IMPORT will be executed (autotype)\n"); + rule_add_token(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL); + valid = 1; } else { - dbg(rules->udev, "IMPORT is not executable, will be included as file (autotype)\n"); - rule->import_type = IMPORT_FILE; + dbg(rules->udev, "IMPORT will be included as file (autotype)\n"); + rule_add_token(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL); + valid = 1; } } - 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) { + mode_t mode = 0; + + if (op != KEY_OP_MATCH && op != 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); + attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1); + if (attr != NULL) { + mode = strtol(attr, NULL, 8); + rule_add_token(&rule_tmp, TK_M_TEST, op, value, &mode); + } else { + rule_add_token(&rule_tmp, TK_M_TEST, op, value, NULL); + } 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); + int flag = 0; + + attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1); + if (attr != NULL && strstr(attr, "ignore_error")) + flag = 1; + rule_add_token(&rule_tmp, TK_A_RUN, op, value, &flag); valid = 1; continue; } if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) { - add_rule_key(rule, &rule->wait_for, operation, value); + rule_add_token(&rule_tmp, TK_M_WAITFOR, 0, value, NULL); valid = 1; continue; } if (strcasecmp(key, "LABEL") == 0) { - add_rule_key(rule, &rule->label, operation, value); + rule_tmp.rule.rule.label_off = add_string(rules, value); valid = 1; continue; } if (strcasecmp(key, "GOTO") == 0) { - add_rule_key(rule, &rule->goto_label, operation, value); + rule_add_token(&rule_tmp, TK_A_GOTO, 0, value, NULL); 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 (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) { + rule_add_token(&rule_tmp, TK_M_NAME, op, value, NULL); + } else { + if (value[0] == '\0') + dbg(rules->udev, "name empty, node creation suppressed\n"); + rule_add_token(&rule_tmp, TK_A_NAME, op, value, NULL); + attr = get_key_attribute(rules->udev, key + sizeof("NAME")-1); + if (attr != NULL) { + if (strstr(attr, "all_partitions") != NULL) { + int num = DEFAULT_FAKE_PARTITIONS_COUNT; + + dbg(rules->udev, "creation of partition nodes requested\n"); + rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num); + } + if (strstr(attr, "ignore_remove") != NULL) { + dbg(rules->udev, "remove event should be ignored\n"); + rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL); + } } } - 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, '$') && !strchr(value, '%'))) { - char *endptr; - strtoul(value, &endptr, 10); - if (endptr[0] != '\0') { - char owner[32]; - uid_t uid = lookup_user(rules->udev, value); - dbg(rules->udev, "replacing username='%s' by id=%i\n", value, uid); - sprintf(owner, "%u", (unsigned int) uid); - add_rule_key(rule, &rule->owner, operation, owner); - continue; - } + if (strcasecmp(key, "SYMLINK") == 0) { + if (op == KEY_OP_MATCH || op == KEY_OP_NOMATCH) + rule_add_token(&rule_tmp, TK_M_DEVLINK, op, value, NULL); + else + rule_add_token(&rule_tmp, TK_A_DEVLINK, op, value, NULL); + valid = 1; + continue; } - add_rule_key(rule, &rule->owner, operation, value); + if (strcasecmp(key, "OWNER") == 0) { + uid_t uid; + char *endptr; + + uid = strtoul(value, &endptr, 10); + if (endptr[0] == '\0') { + rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid); + } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) { + uid = util_lookup_user(rules->udev, value); + rule_add_token(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid); + } else { + rule_add_token(&rule_tmp, TK_A_OWNER, op, value, NULL); + } + valid = 1; continue; } if (strcasecmp(key, "GROUP") == 0) { - valid = 1; - if (rules->resolve_names && (!strchr(value, '$') && !strchr(value, '%'))) { - char *endptr; - strtoul(value, &endptr, 10); - if (endptr[0] != '\0') { - char group[32]; - gid_t gid = lookup_group(rules->udev, value); - dbg(rules->udev, "replacing groupname='%s' by id=%i\n", value, gid); - sprintf(group, "%u", (unsigned int) gid); - add_rule_key(rule, &rule->group, operation, group); - continue; - } + gid_t gid; + char *endptr; + + gid = strtoul(value, &endptr, 10); + if (endptr[0] == '\0') { + rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid); + } else if (rules->resolve_names && strchr("$%", value[0]) == NULL) { + gid = util_lookup_group(rules->udev, value); + rule_add_token(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid); + } else { + rule_add_token(&rule_tmp, TK_A_GROUP, op, value, NULL); } - - add_rule_key(rule, &rule->group, operation, value); + valid = 1; continue; } if (strcasecmp(key, "MODE") == 0) { - add_rule_key(rule, &rule->mode, operation, value); + mode_t mode; + char *endptr; + + mode = strtol(value, &endptr, 8); + if (endptr[0] == '\0') + rule_add_token(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode); + else + rule_add_token(&rule_tmp, TK_A_MODE, op, value, NULL); valid = 1; continue; } @@ -1583,71 +1186,66 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena if (strstr(value, "last_rule") != NULL) { dbg(rules->udev, "last rule to be applied\n"); - rule->last_rule = 1; + rule_add_token(&rule_tmp, TK_A_LAST_RULE, 0, NULL, NULL); } if (strstr(value, "ignore_device") != NULL) { dbg(rules->udev, "device should be ignored\n"); - rule->ignore_device = 1; + rule_add_token(&rule_tmp, TK_A_IGNORE_DEVICE, 0, NULL, NULL); } if (strstr(value, "ignore_remove") != NULL) { dbg(rules->udev, "remove event should be ignored\n"); - rule->ignore_remove = 1; + rule_add_token(&rule_tmp, TK_A_IGNORE_REMOVE, 0, NULL, NULL); } 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); + int prio = atoi(&pos[strlen("link_priority=")]); + + rule_add_token(&rule_tmp, TK_A_DEVLINK_PRIO, 0, NULL, &prio); + dbg(rules->udev, "link priority=%i\n", prio); } 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); + int tout = atoi(&pos[strlen("event_timeout=")]); + + rule_add_token(&rule_tmp, TK_A_EVENT_TIMEOUT, 0, NULL, &tout); + dbg(rules->udev, "event timout=%i\n", tout); } 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; + rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_NONE, 0, NULL, NULL); else if (strncmp(pos, "replace", strlen("replace")) == 0) - rule->string_escape = ESCAPE_REPLACE; + rule_add_token(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, 0, NULL, NULL); } if (strstr(value, "all_partitions") != NULL) { + int num = DEFAULT_FAKE_PARTITIONS_COUNT; + + rule_add_token(&rule_tmp, TK_A_NUM_FAKE_PART, 0, NULL, &num); 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" + if (physdev) + err(rules->udev, "PHYSDEV* values are deprecated and not available on recent kernels, \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; + /* add rule token */ + 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: err(rules->udev, "invalid rule '%s:%u'\n", filename, lineno); return -1; @@ -1656,20 +1254,22 @@ invalid: static int parse_file(struct udev_rules *rules, const char *filename) { FILE *f; + unsigned int filename_off; + unsigned int first_token; char line[UTIL_LINE_SIZE]; - size_t start; - struct udev_rule *rule; - struct udev_rules_iter iter; + int line_nr = 0; + unsigned int i; - start = rules->bufsize; info(rules->udev, "reading '%s' as rules file\n", filename); f = fopen(filename, "r"); if (f == NULL) return -1; + filename_off = add_string(rules, filename); + first_token = rules->token_cur; + while(fgets(line, sizeof(line), f) != NULL) { - int line_nr = 0; char *key; size_t len; @@ -1699,24 +1299,27 @@ static int parse_file(struct udev_rules *rules, const char *filename) err(rules->udev, "line too long '%s':%u, ignored\n", filename, line_nr); continue; } - add_to_rules(rules, key, filename, line_nr); + add_rule(rules, key, filename, filename_off, 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; + /* 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->buf[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 (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0) + continue; + rules->tokens[i].key.rule_goto = j; } + if (rules->tokens[i].key.rule_goto == 0) + err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename); } } return 0; @@ -1771,15 +1374,30 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) char filename[PATH_MAX]; struct udev_list_node file_list; struct udev_list_entry *file_loop, *file_tmp; + unsigned int prev_rule; + struct token end_token; + unsigned int i; rules = malloc(sizeof(struct udev_rules)); if (rules == NULL) - return rules; + return NULL; memset(rules, 0x00, sizeof(struct udev_rules)); rules->udev = udev; rules->resolve_names = resolve_names; udev_list_init(&file_list); + /* init token array and string buffer */ + rules->tokens = malloc(PREALLOC_TOKEN * sizeof(struct token)); + if (rules->tokens != NULL) + rules->token_max = PREALLOC_TOKEN; + rules->buf = malloc(PREALLOC_STRBUF); + if (rules->buf != NULL) + rules->buf_max = PREALLOC_STRBUF; + info(udev, "prealloc %zu bytes tokens (%u * %zu bytes), %zu bytes buffer\n", + rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max); + /* offset 0 in the string buffer is always empty */ + add_string(rules, ""); + if (udev_get_rules_path(udev) != NULL) { /* custom rules location for testing */ add_matching_files(udev, &file_list, udev_get_rules_path(udev), ".rules"); @@ -1794,7 +1412,7 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) 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); + util_create_path(udev, filename); udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755); mkdir(filename, 0755); udev_selinux_resetfscreatecon(udev); @@ -1844,6 +1462,42 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) info(udev, "can not read '%s'\n", file_name); udev_list_entry_remove(file_loop); } + + memset(&end_token, 0x00, sizeof(struct token)); + end_token.type = TK_END; + add_token(rules, &end_token); + + /* shrink allocate buffers */ + if (rules->token_cur < rules->token_max) { + struct token *tokens; + + tokens = realloc(rules->tokens, rules->token_cur * sizeof(struct token)); + if (tokens != NULL || rules->token_cur == 0) { + rules->tokens = tokens; + rules->token_max = rules->token_cur; + } + } + if (rules->buf_cur < rules->buf_max) { + char *buf; + + buf = realloc(rules->buf, rules->buf_cur); + if (buf != NULL || rules->buf_cur == 0) { + rules->buf = buf; + rules->buf_max = rules->buf_cur; + } + } + info(udev, "shrunk to %lu bytes tokens (%u * %zu bytes), %zu bytes buffer\n", + rules->token_max * sizeof(struct token), rules->token_max, sizeof(struct token), rules->buf_max); + + /* link all TK_RULE tokens to be able to fast-forward to next TK_RULE */ + prev_rule = 0; + for (i = 1; i < rules->token_cur; i++) { + if (rules->tokens[i].type == TK_RULE) { + rules->tokens[prev_rule].rule.next_rule = i; + prev_rule = i; + } + } + dump_rules(rules); return rules; } @@ -1851,9 +1505,594 @@ void udev_rules_unref(struct udev_rules *rules) { if (rules == NULL) return; - if (rules->buf) { - free(rules->buf); - rules->buf = NULL; - } + free(rules->tokens); + free(rules->buf); free(rules); } + +static int match_key(struct udev_rules *rules, struct token *token, const char *val) +{ + const char *key_name = token_str[token->type]; + char *key_value = &rules->buf[token->key.value_off]; + char *pos; + int match = 0; + + if (val == NULL) + val = ""; + + /* look for a matching string, parts are separated by '|' */ + if (strchr(key_value, '|') != NULL) { + char value[UTIL_PATH_SIZE]; + + util_strlcpy(value, &rules->buf[token->key.value_off], sizeof(value)); + key_value = value; + while (key_value != NULL) { + pos = strchr(key_value, '|'); + if (pos != NULL) { + pos[0] = '\0'; + pos = &pos[1]; + } + dbg(rules->udev, "match %s '%s' <-> '%s'\n", key_name, key_value, val); + match = (fnmatch(key_value, val, 0) == 0); + if (match) + break; + key_value = pos; + } + } else { + match = (fnmatch(key_value, val, 0) == 0); + } + + if (match && (token->key.op == KEY_OP_MATCH)) { + dbg(rules->udev, "%s is true (matching value)\n", key_name); + return 0; + } + if (!match && (token->key.op == KEY_OP_NOMATCH)) { + dbg(rules->udev, "%s is true (non-matching value)\n", key_name); + return 0; + } + dbg(rules->udev, "%s is not true\n", key_name); + return -1; +} + +static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) +{ + char attr[UTIL_PATH_SIZE]; + const char *key_name = &rules->buf[cur->key.attr_off]; + const char *key_value = &rules->buf[cur->key.value_off]; + char value[UTIL_NAME_SIZE] = ""; + size_t len; + + util_strlcpy(attr, key_name, sizeof(attr)); + util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1); + if (value[0] == '\0') { + const char *val; + + val = udev_device_get_sysattr_value(dev, key_name); + if (val != NULL) + util_strlcpy(value, val, sizeof(value)); + } + if (value[0]=='\0') + return -1; + + /* strip trailing whitespace of value, if not asked to match for it */ + len = strlen(key_value); + if (len > 0 && !isspace(key_value[len-1])) { + len = strlen(value); + while (len > 0 && isspace(value[--len])) + value[len] = '\0'; + dbg(rules->udev, "removed trailing whitespace from '%s'\n", value); + } + 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) +{ + struct token *rule; + struct token *cur; + + if (rules->tokens == NULL) + return -1; + + /* loop through token list, match, run actions or forward to next rule */ + cur = &rules->tokens[0]; + while (cur != NULL && cur->type != TK_END) { + enum escape_type esc = ESCAPE_UNSET; + unsigned int idx; + + dump_token(rules, cur); + switch (cur->type) { + case TK_RULE: + /* current rule */ + rule = cur; + esc = ESCAPE_UNSET; + break; + case TK_M_WAITFOR: + { + char filename[UTIL_PATH_SIZE]; + int found; + + util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename)); + udev_event_apply_format(event, filename, sizeof(filename)); + found = (wait_for_file(event->dev, filename, 10) == 0); + if (!found && (cur->key.op != KEY_OP_NOMATCH)) + goto nomatch; + 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: + { + size_t devlen = strlen(udev_get_dev_path(event->udev))+1; + struct udev_list_entry *list_entry; + int match = 0; + + 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)[devlen]; + if (match_key(rules, cur, devlink) == 0) { + match = 1; + 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: + { + struct udev_list_entry *list_entry; + const char *key_name = &rules->buf[cur->key.attr_off]; + const char *value; + + list_entry = udev_device_get_properties_list_entry(event->dev); + list_entry = udev_list_entry_get_by_name(list_entry, key_name); + value = udev_list_entry_get_value(list_entry); + if (value == NULL) { + dbg(event->udev, "ENV{%s} is not set, treat as empty\n", key_name); + value = ""; + } + if (match_key(rules, cur, value)) + 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_ATTR: + if (match_attr(rules, event->dev, event, cur) != 0) + goto nomatch; + break; + case TK_M_KERNELS: + case TK_M_SUBSYSTEMS: + case TK_M_DRIVERS: + case TK_M_ATTRS: + { + struct token *next; + + /* get whole sequence of parent matches */ + next = cur; + while (next->type < TK_PARENTS_MAX) + next++; + + /* loop over parents */ + event->dev_parent = event->dev; + while (1) { + struct token *key; + + dbg(event->udev, "parent: '%s'\n", udev_device_get_syspath(event->dev_parent)); + /* 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; + default: + goto nomatch; + } + dbg(event->udev, "parent key matched\n"); + } + dbg(event->udev, "all parent keys matched\n"); + /* all keys matched */ + 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; + + util_strlcpy(filename, &rules->buf[cur->key.value_off], sizeof(filename)); + udev_event_apply_format(event, filename, sizeof(filename)); + if (util_resolve_subsys_kernel(event->udev, NULL, filename, sizeof(filename), 0) != 0) + if (filename[0] != '/') { + char tmp[UTIL_PATH_SIZE]; + + util_strlcpy(tmp, udev_device_get_syspath(event->dev), sizeof(tmp)); + util_strlcat(tmp, "/", sizeof(tmp)); + util_strlcat(tmp, filename, sizeof(tmp)); + util_strlcpy(filename, tmp, sizeof(filename)); + } + + attr_subst_subdir(filename, sizeof(filename)); + + match = (stat(filename, &statbuf) == 0); + info(event->udev, "'%s' %s", filename, match ? "exists\n" : "does not exist\n"); + if (match && cur->key.mode > 0) { + match = ((statbuf.st_mode & cur->key.mode) > 0); + info(event->udev, "'%s' has mode=%#o and %s %#o\n", filename, statbuf.st_mode, + match ? "matches" : "does not match", cur->key.mode); + } + if (match && cur->key.op == KEY_OP_NOMATCH) + goto nomatch; + if (!match && cur->key.op == KEY_OP_MATCH) + goto nomatch; + break; + } + case TK_M_PROGRAM: + { + char program[UTIL_PATH_SIZE]; + char **envp; + char result[UTIL_PATH_SIZE]; + + free(event->program_result); + event->program_result = NULL; + util_strlcpy(program, &rules->buf[cur->key.value_off], sizeof(program)); + udev_event_apply_format(event, program, sizeof(program)); + envp = udev_device_get_properties_envp(event->dev); + if (util_run_program(event->udev, program, envp, result, sizeof(result), NULL) != 0) { + if (cur->key.op != KEY_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, ALLOWED_CHARS_INPUT); + if (count > 0) + info(event->udev, "%i character(s) replaced\n" , count); + } + event->program_result = strdup(result); + dbg(event->udev, "storing result '%s'\n", event->program_result); + if (cur->key.op == KEY_OP_NOMATCH) + goto nomatch; + } + break; + } + case TK_M_IMPORT_FILE: + { + char import[UTIL_PATH_SIZE]; + + util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import)); + udev_event_apply_format(event, import, sizeof(import)); + if (import_file_into_properties(event->dev, import) != 0) + if (cur->key.op != KEY_OP_NOMATCH) + goto nomatch; + break; + } + case TK_M_IMPORT_PROG: + { + char import[UTIL_PATH_SIZE]; + + util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import)); + udev_event_apply_format(event, import, sizeof(import)); + if (import_program_into_properties(event->dev, import) != 0) + if (cur->key.op != KEY_OP_NOMATCH) + goto nomatch; + break; + } + case TK_M_IMPORT_PARENT: + { + char import[UTIL_PATH_SIZE]; + + util_strlcpy(import, &rules->buf[cur->key.value_off], sizeof(import)); + udev_event_apply_format(event, import, sizeof(import)); + if (import_parent_into_properties(event->dev, import) != 0) + if (cur->key.op != KEY_OP_NOMATCH) + goto nomatch; + break; + } + case TK_M_RESULT: + if (match_key(rules, cur, event->program_result) != 0) + goto nomatch; + break; + + case TK_A_IGNORE_DEVICE: + event->ignore_device = 1; + return 0; + break; + case TK_A_STRING_ESCAPE_NONE: + esc = ESCAPE_NONE; + break; + case TK_A_STRING_ESCAPE_REPLACE: + esc = ESCAPE_REPLACE; + break; + case TK_A_NUM_FAKE_PART: + if (strcmp(udev_device_get_subsystem(event->dev), "block") != 0) + break; + if (udev_device_get_sysnum(event->dev) != NULL) + break; + udev_device_set_num_fake_partitions(event->dev, cur->key.num_fake_part); + 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]; + + if (event->owner_final) + break; + if (cur->key.op == KEY_OP_ASSIGN_FINAL) + event->owner_final = 1; + util_strlcpy(owner, &rules->buf[cur->key.value_off], sizeof(owner)); + udev_event_apply_format(event, owner, sizeof(owner)); + event->uid = util_lookup_user(event->udev, owner); + break; + } + case TK_A_GROUP: + { + char group[UTIL_NAME_SIZE]; + + if (event->group_final) + break; + if (cur->key.op == KEY_OP_ASSIGN_FINAL) + event->group_final = 1; + util_strlcpy(group, &rules->buf[cur->key.value_off], sizeof(group)); + udev_event_apply_format(event, group, sizeof(group)); + event->gid = util_lookup_group(event->udev, group); + break; + } + case TK_A_MODE: + { + char mode[UTIL_NAME_SIZE]; + char *endptr; + + if (event->mode_final) + break; + if (cur->key.op == KEY_OP_ASSIGN_FINAL) + event->mode_final = 1; + util_strlcpy(mode, &rules->buf[cur->key.value_off], sizeof(mode)); + udev_event_apply_format(event, mode, sizeof(mode)); + event->mode = strtol(mode, &endptr, 8); + if (endptr[0] != '\0') { + err(event->udev, "invalide mode '%s' set default mode 0660\n", mode); + event->mode = 0660; + } + break; + } + case TK_A_OWNER_ID: + if (event->owner_final) + break; + if (cur->key.op == KEY_OP_ASSIGN_FINAL) + event->owner_final = 1; + event->uid = cur->key.uid; + break; + case TK_A_GROUP_ID: + if (event->group_final) + break; + if (cur->key.op == KEY_OP_ASSIGN_FINAL) + event->group_final = 1; + event->gid = cur->key.gid; + break; + case TK_A_MODE_ID: + if (event->mode_final) + break; + if (cur->key.op == KEY_OP_ASSIGN_FINAL) + event->mode_final = 1; + event->mode = cur->key.mode; + break; + case TK_A_ENV: + { + const char *name = &rules->buf[cur->key.attr_off]; + char *value = &rules->buf[cur->key.value_off]; + + if (value[0] != '\0') { + char temp_value[UTIL_NAME_SIZE]; + struct udev_list_entry *entry; + + util_strlcpy(temp_value, value, sizeof(temp_value)); + udev_event_apply_format(event, temp_value, sizeof(temp_value)); + entry = udev_device_add_property(event->dev, name, temp_value); + /* store in db */ + udev_list_entry_set_flag(entry, 1); + } else { + udev_device_add_property(event->dev, name, NULL); + } + break; + } + case TK_A_NAME: + { + const char *name = &rules->buf[cur->key.value_off]; + char name_str[UTIL_PATH_SIZE]; + int count; + + if (event->name_final) + break; + if (cur->key.op == KEY_OP_ASSIGN_FINAL) + event->name_final = 1; + if (name[0] == '\0') { + free(event->name); + event->name = NULL; + break; + } + util_strlcpy(name_str, name, sizeof(name_str)); + udev_event_apply_format(event, name_str, sizeof(name_str)); + if (esc == ESCAPE_UNSET || esc == ESCAPE_REPLACE) { + count = util_replace_chars(name_str, ALLOWED_CHARS_FILE); + if (count > 0) + info(event->udev, "%i character(s) replaced\n", count); + event->name = strdup(name_str); + } + 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 (cur->key.op == KEY_OP_ASSIGN_FINAL) + event->devlink_final = 1; + if (cur->key.op == KEY_OP_ASSIGN || cur->key.op == KEY_OP_ASSIGN_FINAL) + udev_device_cleanup_devlinks_list(event->dev); + + /* allow multiple symlinks separated by spaces */ + util_strlcpy(temp, &rules->buf[cur->key.value_off], sizeof(temp)); + udev_event_apply_format(event, temp, sizeof(temp)); + if (esc == ESCAPE_UNSET) + count = util_replace_chars(temp, ALLOWED_CHARS_FILE " "); + else if (esc == ESCAPE_REPLACE) + count = util_replace_chars(temp, ALLOWED_CHARS_FILE); + if (count > 0) + info(event->udev, "%i character(s) replaced\n" , count); + dbg(event->udev, "rule applied, added symlink(s) '%s'\n", temp); + pos = temp; + while (isspace(pos[0])) + pos++; + next = strchr(pos, ' '); + while (next) { + next[0] = '\0'; + info(event->udev, "add symlink '%s'\n", pos); + util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename)); + util_strlcat(filename, "/", sizeof(filename)); + util_strlcat(filename, pos, sizeof(filename)); + udev_device_add_devlink(event->dev, filename); + while (isspace(next[1])) + next++; + pos = &next[1]; + next = strchr(pos, ' '); + } + if (pos[0] != '\0') { + info(event->udev, "add symlink '%s'\n", pos); + util_strlcpy(filename, udev_get_dev_path(event->udev), sizeof(filename)); + util_strlcat(filename, "/", sizeof(filename)); + util_strlcat(filename, pos, sizeof(filename)); + udev_device_add_devlink(event->dev, filename); + } + } + break; + case TK_A_EVENT_TIMEOUT: + udev_device_set_event_timeout(event->dev, cur->key.event_timeout); + break; + case TK_A_IGNORE_REMOVE: + udev_device_set_ignore_remove(event->dev, 1); + break; + case TK_A_ATTR: + { + const char *key_name = &rules->buf[cur->key.attr_off]; + char attr[UTIL_PATH_SIZE]; + char value[UTIL_NAME_SIZE]; + FILE *f; + + util_strlcpy(attr, key_name, sizeof(attr)); + if (util_resolve_subsys_kernel(event->udev, key_name, attr, sizeof(attr), 0) != 0) { + util_strlcpy(attr, udev_device_get_syspath(event->dev), sizeof(attr)); + util_strlcat(attr, "/", sizeof(attr)); + util_strlcat(attr, key_name, sizeof(attr)); + } + + attr_subst_subdir(attr, sizeof(attr)); + + util_strlcpy(value, &rules->buf[cur->key.value_off], sizeof(value)); + udev_event_apply_format(event, value, sizeof(value)); + info(event->udev, "writing '%s' to sysfs file '%s'\n", value, attr); + f = fopen(attr, "w"); + if (f != NULL) { + if (!event->test) + if (fprintf(f, "%s", value) <= 0) + err(event->udev, "error writing ATTR{%s}: %m\n", attr); + fclose(f); + } else { + err(event->udev, "error opening ATTR{%s} for writing: %m\n", attr); + } + break; + } + case TK_A_RUN: + { + struct udev_list_entry *list_entry; + + if (cur->key.op == KEY_OP_ASSIGN || cur->key.op == KEY_OP_ASSIGN_FINAL) + udev_list_cleanup_entries(event->udev, &event->run_list); + list_entry = udev_list_entry_add(event->udev, &event->run_list, + &rules->buf[cur->key.value_off], NULL, 1, 0); + if (cur->key.ignore_error) + udev_list_entry_set_flag(list_entry, 1); + break; + } + case TK_A_GOTO: + cur = &rules->tokens[cur->key.rule_goto]; + continue; + case TK_A_LAST_RULE: + break; + + case TK_PARENTS_MAX: + case TK_END: + case TK_UNDEF: + err(rules->udev, "wrong type %u\n", cur->type); + goto nomatch; + } + + cur++; + continue; + nomatch: + /* fast-forward to next rule */ + idx = rule->rule.next_rule; + if (idx == 0) + break; + dbg(rules->udev, "forward to rule: %u\n", idx); + cur = &rules->tokens[idx]; + } + return 0; +}