udev: timeout - warn after a third of the timeout before killing

[elogind.git] / src / udev / udev-rules.c

diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c
index 55185920fa054ad7695797d718633558c33b04d9..db95442fda916730f1fb392ded5cecf64629e336 100644 (file)
--- a/src/udev/udev-rules.c
+++ b/src/udev/udev-rules.c
@@ -82,7 +82,7 @@ static unsigned int rules_add_string(struct udev_rules *rules, const char *s) {
         return strbuf_add_string(rules->strbuf, s, strlen(s));
 }
 
-/* KEY=="", KEY!="", KEY+="", KEY="", KEY:="" */
+/* KEY=="", KEY!="", KEY+="", KEY-="", KEY="", KEY:="" */
 enum operation_type {
         OP_UNSET,
 
@@ -91,6 +91,7 @@ enum operation_type {
         OP_MATCH_MAX,
 
         OP_ADD,
+        OP_REMOVE,
         OP_ASSIGN,
         OP_ASSIGN_FINAL,
 };
@@ -224,6 +225,7 @@ static const char *operation_str(enum operation_type type) {
                 [OP_MATCH_MAX] =        "MATCH_MAX",
 
                 [OP_ADD] =              "add",
+                [OP_REMOVE] =           "remove",
                 [OP_ASSIGN] =           "assign",
                 [OP_ASSIGN_FINAL] =     "assign-final",
 }        ;
@@ -459,7 +461,6 @@ static uid_t add_uid(struct udev_rules *rules, const char *owner) {
         unsigned int i;
         uid_t uid;
         unsigned int off;
-        int r;
 
         /* lookup, if we know it already */
         for (i = 0; i < rules->uids_cur; i++) {
@@ -469,9 +470,7 @@ static uid_t add_uid(struct udev_rules *rules, const char *owner) {
                         return uid;
                 }
         }
-        r = get_user_creds(&owner, &uid, NULL, NULL, NULL);
-        if (r < 0)
-                uid = 0;
+        uid = util_lookup_user(rules->udev, owner);
 
         /* grow buffer if needed */
         if (rules->uids_cur+1 >= rules->uids_max) {
@@ -502,7 +501,6 @@ static gid_t add_gid(struct udev_rules *rules, const char *group) {
         unsigned int i;
         gid_t gid;
         unsigned int off;
-        int r;
 
         /* lookup, if we know it already */
         for (i = 0; i < rules->gids_cur; i++) {
@@ -512,9 +510,7 @@ static gid_t add_gid(struct udev_rules *rules, const char *group) {
                         return gid;
                 }
         }
-        r = get_group_creds(&group, &gid);
-        if (r < 0)
-                gid = 0;
+        gid = util_lookup_group(rules->udev, group);
 
         /* grow buffer if needed */
         if (rules->gids_cur+1 >= rules->gids_max) {
@@ -619,6 +615,7 @@ static int import_file_into_properties(struct udev_device *dev, const char *file
 
 static int import_program_into_properties(struct udev_event *event,
                                           usec_t timeout_usec,
+                                          usec_t timeout_warn_usec,
                                           const char *program, const sigset_t *sigmask) {
         struct udev_device *dev = event->dev;
         char **envp;
@@ -627,7 +624,7 @@ static int import_program_into_properties(struct udev_event *event,
         int err;
 
         envp = udev_device_get_properties_envp(dev);
-        err = udev_event_spawn(event, timeout_usec, program, envp, sigmask, result, sizeof(result));
+        err = udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, result, sizeof(result));
         if (err < 0)
                 return err;
 
@@ -767,7 +764,7 @@ static int get_key(struct udev *udev, char **line, char **key, enum operation_ty
                         break;
                 if (linepos[0] == '=')
                         break;
-                if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
+                if ((linepos[0] == '+') || (linepos[0] == '-') || (linepos[0] == '!') || (linepos[0] == ':'))
                         if (linepos[1] == '=')
                                 break;
         }
@@ -791,6 +788,9 @@ static int get_key(struct udev *udev, char **line, char **key, enum operation_ty
         } else if (linepos[0] == '+' && linepos[1] == '=') {
                 *op = OP_ADD;
                 linepos += 2;
+        } else if (linepos[0] == '-' && linepos[1] == '=') {
+                *op = OP_REMOVE;
+                linepos += 2;
         } else if (linepos[0] == '=') {
                 *op = OP_ASSIGN;
                 linepos++;
@@ -1127,6 +1127,10 @@ static int add_rule(struct udev_rules *rules, char *line,
                                 log_error("error parsing ATTR attribute");
                                 goto invalid;
                         }
+                        if (op == OP_REMOVE) {
+                                log_error("invalid ATTR operation");
+                                goto invalid;
+                        }
                         if (op < OP_MATCH_MAX) {
                                 rule_add_key(&rule_tmp, TK_M_ATTR, op, value, attr);
                         } else {
@@ -1141,6 +1145,10 @@ static int add_rule(struct udev_rules *rules, char *line,
                                 log_error("error parsing SECLABEL attribute");
                                 goto invalid;
                         }
+                        if (op == OP_REMOVE) {
+                                log_error("invalid SECLABEL operation");
+                                goto invalid;
+                        }
 
                         rule_add_key(&rule_tmp, TK_A_SECLABEL, op, value, attr);
                         continue;
@@ -1208,6 +1216,10 @@ static int add_rule(struct udev_rules *rules, char *line,
                                 log_error("error parsing ENV attribute");
                                 goto invalid;
                         }
+                        if (op == OP_REMOVE) {
+                                log_error("invalid ENV operation");
+                                goto invalid;
+                        }
                         if (op < OP_MATCH_MAX) {
                                 if (rule_add_key(&rule_tmp, TK_M_ENV, op, value, attr) != 0)
                                         goto invalid;
@@ -1248,6 +1260,10 @@ static int add_rule(struct udev_rules *rules, char *line,
                 }
 
                 if (streq(key, "PROGRAM")) {
+                        if (op == OP_REMOVE) {
+                                log_error("invalid PROGRAM operation");
+                                goto invalid;
+                        }
                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
                         continue;
                 }
@@ -1267,6 +1283,10 @@ static int add_rule(struct udev_rules *rules, char *line,
                                 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u", filename, lineno);
                                 continue;
                         }
+                        if (op == OP_REMOVE) {
+                                log_error("invalid IMPORT operation");
+                                goto invalid;
+                        }
                         if (streq(attr, "program")) {
                                 /* find known built-in command */
                                 if (value[0] != '/') {
@@ -1322,6 +1342,10 @@ static int add_rule(struct udev_rules *rules, char *line,
                         attr = get_key_attribute(rules->udev, key + strlen("RUN"));
                         if (attr == NULL)
                                 attr = "program";
+                        if (op == OP_REMOVE) {
+                                log_error("invalid RUN operation");
+                                goto invalid;
+                        }
 
                         if (streq(attr, "builtin")) {
                                 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
@@ -1329,7 +1353,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                                 if (cmd < UDEV_BUILTIN_MAX)
                                         rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
                                 else
-                                        log_error("IMPORT{builtin}: '%s' unknown %s:%u", value, filename, lineno);
+                                        log_error("RUN{builtin}: '%s' unknown %s:%u", value, filename, lineno);
                         } else if (streq(attr, "program")) {
                                 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
 
@@ -1342,21 +1366,37 @@ static int add_rule(struct udev_rules *rules, char *line,
                 }
 
                 if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
+                        if (op == OP_REMOVE) {
+                                log_error("invalid WAIT_FOR/WAIT_FOR_SYSFS operation");
+                                goto invalid;
+                        }
                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
                         continue;
                 }
 
                 if (streq(key, "LABEL")) {
+                        if (op == OP_REMOVE) {
+                                log_error("invalid LABEL operation");
+                                goto invalid;
+                        }
                         rule_tmp.rule.rule.label_off = rules_add_string(rules, value);
                         continue;
                 }
 
                 if (streq(key, "GOTO")) {
+                        if (op == OP_REMOVE) {
+                                log_error("invalid GOTO operation");
+                                goto invalid;
+                        }
                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
                         continue;
                 }
 
                 if (startswith(key, "NAME")) {
+                        if (op == OP_REMOVE) {
+                                log_error("invalid NAME operation");
+                                goto invalid;
+                        }
                         if (op < OP_MATCH_MAX) {
                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
                         } else {
@@ -1377,6 +1417,10 @@ static int add_rule(struct udev_rules *rules, char *line,
                 }
 
                 if (streq(key, "SYMLINK")) {
+                        if (op == OP_REMOVE) {
+                                log_error("invalid SYMLINK operation");
+                                goto invalid;
+                        }
                         if (op < OP_MATCH_MAX)
                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
                         else
@@ -1389,6 +1433,11 @@ static int add_rule(struct udev_rules *rules, char *line,
                         uid_t uid;
                         char *endptr;
 
+                        if (op == OP_REMOVE) {
+                                log_error("invalid OWNER operation");
+                                goto invalid;
+                        }
+
                         uid = strtoul(value, &endptr, 10);
                         if (endptr[0] == '\0') {
                                 rule_add_key(&rule_tmp, TK_A_OWNER_ID, op, NULL, &uid);
@@ -1406,6 +1455,11 @@ static int add_rule(struct udev_rules *rules, char *line,
                         gid_t gid;
                         char *endptr;
 
+                        if (op == OP_REMOVE) {
+                                log_error("invalid GROUP operation");
+                                goto invalid;
+                        }
+
                         gid = strtoul(value, &endptr, 10);
                         if (endptr[0] == '\0') {
                                 rule_add_key(&rule_tmp, TK_A_GROUP_ID, op, NULL, &gid);
@@ -1423,6 +1477,11 @@ static int add_rule(struct udev_rules *rules, char *line,
                         mode_t mode;
                         char *endptr;
 
+                        if (op == OP_REMOVE) {
+                                log_error("invalid MODE operation");
+                                goto invalid;
+                        }
+
                         mode = strtol(value, &endptr, 8);
                         if (endptr[0] == '\0')
                                 rule_add_key(&rule_tmp, TK_A_MODE_ID, op, NULL, &mode);
@@ -1435,6 +1494,11 @@ static int add_rule(struct udev_rules *rules, char *line,
                 if (streq(key, "OPTIONS")) {
                         const char *pos;
 
+                        if (op == OP_REMOVE) {
+                                log_error("invalid OPTIONS operation");
+                                goto invalid;
+                        }
+
                         pos = strstr(value, "link_priority=");
                         if (pos != NULL) {
                                 int prio = atoi(&pos[strlen("link_priority=")]);
@@ -1799,6 +1863,7 @@ enum escape_type {
 int udev_rules_apply_to_event(struct udev_rules *rules,
                               struct udev_event *event,
                               usec_t timeout_usec,
+                              usec_t timeout_warn_usec,
                               const sigset_t *sigmask) {
         struct token *cur;
         struct token *rule;
@@ -2007,7 +2072,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules,
                                   rules_str(rules, rule->rule.filename_off),
                                   rule->rule.filename_line);
 
-                        if (udev_event_spawn(event, timeout_usec, program, envp, sigmask, result, sizeof(result)) < 0) {
+                        if (udev_event_spawn(event, timeout_usec, timeout_warn_usec, program, envp, sigmask, result, sizeof(result)) < 0) {
                                 if (cur->key.op != OP_NOMATCH)
                                         goto nomatch;
                         } else {
@@ -2043,7 +2108,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules,
                                   rules_str(rules, rule->rule.filename_off),
                                   rule->rule.filename_line);
 
-                        if (import_program_into_properties(event, timeout_usec, import, sigmask) != 0)
+                        if (import_program_into_properties(event, timeout_usec, timeout_warn_usec, import, sigmask) != 0)
                                 if (cur->key.op != OP_NOMATCH)
                                         goto nomatch;
                         break;
@@ -2176,7 +2241,6 @@ int udev_rules_apply_to_event(struct udev_rules *rules,
                         break;
                 case TK_A_OWNER: {
                         char owner[UTIL_NAME_SIZE];
-                        int r;
 
                         if (event->owner_final)
                                 break;
@@ -2184,9 +2248,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules,
                                 event->owner_final = true;
                         udev_event_apply_format(event, rules_str(rules, cur->key.value_off), owner, sizeof(owner));
                         event->owner_set = true;
-                        r = get_user_creds(&owner, &event->uid, NULL, NULL, NULL);
-                        if (r < 0)
-                                event->uid = 0;
+                        event->uid = util_lookup_user(event->udev, owner);
                         log_debug("OWNER %u %s:%u",
                                   event->uid,
                                   rules_str(rules, rule->rule.filename_off),
@@ -2195,7 +2257,6 @@ int udev_rules_apply_to_event(struct udev_rules *rules,
                 }
                 case TK_A_GROUP: {
                         char group[UTIL_NAME_SIZE];
-                        int r;
 
                         if (event->group_final)
                                 break;
@@ -2203,9 +2264,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules,
                                 event->group_final = true;
                         udev_event_apply_format(event, rules_str(rules, cur->key.value_off), group, sizeof(group));
                         event->group_set = true;
-                        r = get_group_creds(&group, &event->gid);
-                        if (r < 0)
-                                event->gid = 0;
+                        event->gid = util_lookup_group(event->udev, group);
                         log_debug("GROUP %u %s:%u",
                                   event->gid,
                                   rules_str(rules, rule->rule.filename_off),
@@ -2332,7 +2391,10 @@ int udev_rules_apply_to_event(struct udev_rules *rules,
                                 log_error("ignoring invalid tag name '%s'", tag);
                                 break;
                         }
-                        udev_device_add_tag(event->dev, tag);
+                        if (cur->key.op == OP_REMOVE)
+                                udev_device_remove_tag(event->dev, tag);
+                        else
+                                udev_device_add_tag(event->dev, tag);
                         break;
                 }
                 case TK_A_NAME: {