X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fudev%2Fudev-rules.c;h=59bc1249857ae385f0892f47da772e72e733b934;hp=8d2b057e2f6c4ab0d3726eb51c92c3ed5430e9e1;hb=9ec6e95b046de71c0198cb9d17acc5462dc76c74;hpb=2ad8416dd057e7e3185169609ca3006e7649f576 diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c index 8d2b057e2..59bc12498 100644 --- a/src/udev/udev-rules.c +++ b/src/udev/udev-rules.c @@ -137,7 +137,6 @@ enum token_type { TK_M_PARENTS_MAX, TK_M_TEST, /* val, mode_t */ - TK_M_EVENT_TIMEOUT, /* int */ TK_M_PROGRAM, /* val */ TK_M_IMPORT_FILE, /* val */ TK_M_IMPORT_PROG, /* val */ @@ -201,7 +200,6 @@ struct token { uid_t uid; gid_t gid; int devlink_prio; - int event_timeout; int watch; enum udev_builtin_cmd builtin_cmd; }; @@ -218,8 +216,7 @@ struct rule_tmp { }; #ifdef DEBUG -static const char *operation_str(enum operation_type type) -{ +static const char *operation_str(enum operation_type type) { static const char *operation_strs[] = { [OP_UNSET] = "UNSET", [OP_MATCH] = "match", @@ -234,8 +231,7 @@ static const char *operation_str(enum operation_type type) return operation_strs[type]; } -static const char *string_glob_str(enum string_glob_type type) -{ +static const char *string_glob_str(enum string_glob_type type) { static const char *string_glob_strs[] = { [GL_UNSET] = "UNSET", [GL_PLAIN] = "plain", @@ -248,8 +244,7 @@ static const char *string_glob_str(enum string_glob_type type) return string_glob_strs[type]; } -static const char *token_str(enum token_type type) -{ +static const char *token_str(enum token_type type) { static const char *token_strs[] = { [TK_UNSET] = "UNSET", [TK_RULE] = "RULE", @@ -275,7 +270,6 @@ static const char *token_str(enum token_type type) [TK_M_PARENTS_MAX] = "M PARENTS_MAX", [TK_M_TEST] = "M TEST", - [TK_M_EVENT_TIMEOUT] = "M EVENT_TIMEOUT", [TK_M_PROGRAM] = "M PROGRAM", [TK_M_IMPORT_FILE] = "M IMPORT_FILE", [TK_M_IMPORT_PROG] = "M IMPORT_PROG", @@ -314,8 +308,7 @@ static const char *token_str(enum token_type type) return token_strs[type]; } -static void dump_token(struct udev_rules *rules, struct token *token) -{ +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; @@ -409,9 +402,6 @@ static void dump_token(struct udev_rules *rules, struct token *token) case TK_A_SECLABEL: log_debug("%s %s '%s' '%s'", token_str(type), operation_str(op), attr, value); break; - case TK_M_EVENT_TIMEOUT: - log_debug("%s %u", token_str(type), token->key.event_timeout); - break; case TK_A_GOTO: log_debug("%s '%s' %u", token_str(type), value, token->key.rule_goto); break; @@ -427,8 +417,7 @@ static void dump_token(struct udev_rules *rules, struct token *token) } } -static void dump_rules(struct udev_rules *rules) -{ +static void dump_rules(struct udev_rules *rules) { unsigned int i; log_debug("dumping %u (%zu bytes) tokens, %u (%zu bytes) strings", @@ -440,14 +429,11 @@ static void dump_rules(struct udev_rules *rules) dump_token(rules, &rules->tokens[i]); } #else -static inline const char *operation_str(enum operation_type type) { return NULL; } -static inline const char *token_str(enum token_type type) { return NULL; } 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) -{ +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; @@ -469,8 +455,7 @@ static int add_token(struct udev_rules *rules, struct token *token) return 0; } -static uid_t add_uid(struct udev_rules *rules, const char *owner) -{ +static uid_t add_uid(struct udev_rules *rules, const char *owner) { unsigned int i; uid_t uid; unsigned int off; @@ -510,8 +495,7 @@ static uid_t add_uid(struct udev_rules *rules, const char *owner) return uid; } -static gid_t add_gid(struct udev_rules *rules, const char *group) -{ +static gid_t add_gid(struct udev_rules *rules, const char *group) { unsigned int i; gid_t gid; unsigned int off; @@ -551,8 +535,7 @@ static gid_t add_gid(struct udev_rules *rules, const char *group) return gid; } -static int import_property_from_string(struct udev_device *dev, char *line) -{ +static int import_property_from_string(struct udev_device *dev, char *line) { char *key; char *val; size_t len; @@ -615,8 +598,7 @@ static int import_property_from_string(struct udev_device *dev, char *line) return 0; } -static int import_file_into_properties(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]; @@ -629,8 +611,9 @@ static int import_file_into_properties(struct udev_device *dev, const char *file return 0; } -static int import_program_into_properties(struct udev_event *event, const char *program, const sigset_t *sigmask) -{ +static int import_program_into_properties(struct udev_event *event, + usec_t timeout_usec, + const char *program, const sigset_t *sigmask) { struct udev_device *dev = event->dev; char **envp; char result[UTIL_LINE_SIZE]; @@ -638,7 +621,7 @@ static int import_program_into_properties(struct udev_event *event, const char * int err; envp = udev_device_get_properties_envp(dev); - err = udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)); + err = udev_event_spawn(event, timeout_usec, program, envp, sigmask, result, sizeof(result)); if (err < 0) return err; @@ -657,8 +640,7 @@ static int import_program_into_properties(struct udev_event *event, const char * return 0; } -static int import_parent_into_properties(struct udev_device *dev, const char *filter) -{ +static int import_parent_into_properties(struct udev_device *dev, const char *filter) { struct udev_device *dev_parent; struct udev_list_entry *list_entry; @@ -683,8 +665,7 @@ static int import_parent_into_properties(struct udev_device *dev, const char *fi } #define WAIT_LOOP_PER_SECOND 50 -static int wait_for_file(struct udev_device *dev, const char *file, int timeout) -{ +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; @@ -718,8 +699,7 @@ static int wait_for_file(struct udev_device *dev, const char *file, int timeout) return -1; } -static int attr_subst_subdir(char *attr, size_t len) -{ +static int attr_subst_subdir(char *attr, size_t len) { bool found = false; if (strstr(attr, "/*/")) { @@ -756,8 +736,7 @@ static int attr_subst_subdir(char *attr, size_t len) return found; } -static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value) -{ +static int get_key(struct udev *udev, char **line, char **key, enum operation_type *op, char **value) { char *linepos; char *temp; @@ -844,8 +823,7 @@ static int get_key(struct udev *udev, char **line, char **key, enum operation_ty } /* extract possible KEY{attr} */ -static const char *get_key_attribute(struct udev *udev, char *str) -{ +static const char *get_key_attribute(struct udev *udev, char *str) { char *pos; char *attr; @@ -865,12 +843,11 @@ static const char *get_key_attribute(struct udev *udev, char *str) static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, enum operation_type op, - const char *value, const void *data) -{ + const char *value, const void *data) { struct token *token = &rule_tmp->token[rule_tmp->token_cur]; const char *attr = NULL; - memset(token, 0x00, sizeof(struct token)); + memzero(token, sizeof(struct token)); switch (type) { case TK_M_ACTION: @@ -900,6 +877,7 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, 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: @@ -943,12 +921,6 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, case TK_A_MODE_ID: token->key.mode = *(mode_t *)data; break; - case TK_A_STATIC_NODE: - token->key.value_off = rules_add_string(rule_tmp->rules, value); - break; - case TK_M_EVENT_TIMEOUT: - token->key.event_timeout = *(int *)data; - break; case TK_RULE: case TK_M_PARENTS_MIN: case TK_M_PARENTS_MAX: @@ -993,7 +965,7 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, } if (attr != NULL) { - /* check if property/attribut name has substitution chars */ + /* check if property/attribute name has substitution chars */ if (attr[0] == '[') token->key.attrsubst = SB_SUBSYS; else if (strchr(attr, '%') != NULL || strchr(attr, '$') != NULL) @@ -1012,8 +984,7 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type, return 0; } -static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) -{ +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; @@ -1048,13 +1019,12 @@ static int sort_token(struct udev_rules *rules, struct rule_tmp *rule_tmp) } static int add_rule(struct udev_rules *rules, char *line, - const char *filename, unsigned int filename_off, unsigned int lineno) -{ + const char *filename, unsigned int filename_off, unsigned int lineno) { char *linepos; const char *attr; struct rule_tmp rule_tmp; - memset(&rule_tmp, 0x00, sizeof(struct rule_tmp)); + memzero(&rule_tmp, sizeof(struct rule_tmp)); rule_tmp.rules = rules; rule_tmp.rule.type = TK_RULE; /* the offset in the rule is limited to unsigned short */ @@ -1146,7 +1116,7 @@ static int add_rule(struct udev_rules *rules, char *line, } if (startswith(key, "ATTR{")) { - attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1); + attr = get_key_attribute(rules->udev, key + strlen("ATTR")); if (attr == NULL) { log_error("error parsing ATTR attribute"); goto invalid; @@ -1160,7 +1130,7 @@ static int add_rule(struct udev_rules *rules, char *line, } if (startswith(key, "SECLABEL{")) { - attr = get_key_attribute(rules->udev, key + sizeof("SECLABEL")-1); + attr = get_key_attribute(rules->udev, key + strlen("SECLABEL")); if (!attr) { log_error("error parsing SECLABEL attribute"); goto invalid; @@ -1202,7 +1172,7 @@ static int add_rule(struct udev_rules *rules, char *line, log_error("invalid ATTRS operation"); goto invalid; } - attr = get_key_attribute(rules->udev, key + sizeof("ATTRS")-1); + attr = get_key_attribute(rules->udev, key + strlen("ATTRS")); if (attr == NULL) { log_error("error parsing ATTRS attribute"); goto invalid; @@ -1227,7 +1197,7 @@ static int add_rule(struct udev_rules *rules, char *line, } if (startswith(key, "ENV{")) { - attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1); + attr = get_key_attribute(rules->udev, key + strlen("ENV")); if (attr == NULL) { log_error("error parsing ENV attribute"); goto invalid; @@ -1286,7 +1256,7 @@ static int add_rule(struct udev_rules *rules, char *line, } if (startswith(key, "IMPORT")) { - attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1); + attr = get_key_attribute(rules->udev, key + strlen("IMPORT")); if (attr == NULL) { log_error("IMPORT{} type missing, ignoring IMPORT %s:%u", filename, lineno); continue; @@ -1332,7 +1302,7 @@ static int add_rule(struct udev_rules *rules, char *line, log_error("invalid TEST operation"); goto invalid; } - attr = get_key_attribute(rules->udev, key + sizeof("TEST")-1); + 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); @@ -1343,7 +1313,7 @@ static int add_rule(struct udev_rules *rules, char *line, } if (startswith(key, "RUN")) { - attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1); + attr = get_key_attribute(rules->udev, key + strlen("RUN")); if (attr == NULL) attr = "program"; @@ -1466,14 +1436,6 @@ static int add_rule(struct udev_rules *rules, char *line, rule_add_key(&rule_tmp, TK_A_DEVLINK_PRIO, op, NULL, &prio); } - pos = strstr(value, "event_timeout="); - if (pos != NULL) { - int tout = atoi(&pos[strlen("event_timeout=")]); - - rule_add_key(&rule_tmp, TK_M_EVENT_TIMEOUT, op, NULL, &tout); - } - - pos = strstr(value, "string_escape="); if (pos != NULL) { pos = &pos[strlen("string_escape=")]; if (startswith(pos, "none")) @@ -1528,8 +1490,7 @@ invalid: return -1; } -static int parse_file(struct udev_rules *rules, const char *filename) -{ +static int parse_file(struct udev_rules *rules, const char *filename) { FILE *f; unsigned int first_token; unsigned int filename_off; @@ -1537,15 +1498,19 @@ static int parse_file(struct udev_rules *rules, const char *filename) int line_nr = 0; unsigned int i; - if (null_or_empty_path(filename)) { - log_debug("skip empty file: %s", filename); - return 0; + f = fopen(filename, "re"); + if (!f) { + if (errno == ENOENT) + return 0; + else + return -errno; } - log_debug("read rules file: %s", filename); - f = fopen(filename, "re"); - if (f == NULL) - return -1; + 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); @@ -1609,15 +1574,14 @@ static int parse_file(struct udev_rules *rules, const char *filename) return 0; } -struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) -{ +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 = calloc(1, sizeof(struct udev_rules)); + rules = new0(struct udev_rules, 1); if (rules == NULL) return NULL; rules->udev = udev; @@ -1654,7 +1618,7 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) strv_free(files); - memset(&end_token, 0x00, sizeof(struct token)); + 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", @@ -1680,8 +1644,7 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names) return rules; } -struct udev_rules *udev_rules_unref(struct udev_rules *rules) -{ +struct udev_rules *udev_rules_unref(struct udev_rules *rules) { if (rules == NULL) return NULL; free(rules->tokens); @@ -1692,16 +1655,14 @@ struct udev_rules *udev_rules_unref(struct udev_rules *rules) return NULL; } -bool udev_rules_check_timestamp(struct udev_rules *rules) -{ +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) -{ +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; @@ -1774,8 +1735,7 @@ static int match_key(struct udev_rules *rules, struct token *token, const char * return -1; } -static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct udev_event *event, struct token *cur) -{ +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; @@ -1829,8 +1789,10 @@ enum escape_type { ESCAPE_REPLACE, }; -int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event, const sigset_t *sigmask) -{ +int udev_rules_apply_to_event(struct udev_rules *rules, + struct udev_event *event, + usec_t timeout_usec, + const sigset_t *sigmask) { struct token *cur; struct token *rule; enum escape_type esc = ESCAPE_UNSET; @@ -2024,14 +1986,10 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event goto nomatch; break; } - case TK_M_EVENT_TIMEOUT: - log_debug("OPTIONS event_timeout=%u", cur->key.event_timeout); - event->timeout_usec = cur->key.event_timeout * 1000 * 1000; - break; case TK_M_PROGRAM: { char program[UTIL_PATH_SIZE]; char **envp; - char result[UTIL_PATH_SIZE]; + char result[UTIL_LINE_SIZE]; free(event->program_result); event->program_result = NULL; @@ -2042,7 +2000,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event rules_str(rules, rule->rule.filename_off), rule->rule.filename_line); - if (udev_event_spawn(event, program, envp, sigmask, result, sizeof(result)) < 0) { + if (udev_event_spawn(event, timeout_usec, program, envp, sigmask, result, sizeof(result)) < 0) { if (cur->key.op != OP_NOMATCH) goto nomatch; } else { @@ -2078,7 +2036,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event rules_str(rules, rule->rule.filename_off), rule->rule.filename_line); - if (import_program_into_properties(event, import, sigmask) != 0) + if (import_program_into_properties(event, timeout_usec, import, sigmask) != 0) if (cur->key.op != OP_NOMATCH) goto nomatch; break; @@ -2503,8 +2461,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event } } -int udev_rules_apply_static_dev_perms(struct udev_rules *rules) -{ +int udev_rules_apply_static_dev_perms(struct udev_rules *rules) { struct token *cur; struct token *rule; uid_t uid = 0; @@ -2559,17 +2516,18 @@ int udev_rules_apply_static_dev_perms(struct udev_rules *rules) 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) - goto next; + break; if (!S_ISBLK(stats.st_mode) && !S_ISCHR(stats.st_mode)) - goto next; + break; + /* export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */ if (tags) { - /* Export the tags to a directory as symlinks, allowing otherwise dead nodes to be tagged */ - STRV_FOREACH(t, tags) { _cleanup_free_ char *unescaped_filename = NULL; @@ -2594,7 +2552,7 @@ int udev_rules_apply_static_dev_perms(struct udev_rules *rules) /* don't touch the permissions if only the tags were set */ if (mode == 0 && uid == 0 && gid == 0) - goto next; + break; if (mode == 0) { if (gid > 0)