coverity: fix a couple of bugs found by coverity

[elogind.git] / src / path.c

diff --git a/src/path.c b/src/path.c
index 1455b47995e4943f2bf3affb10d8b558e2fa3951..f15c9214efb35c73fd5cdea904dc802d5fc783cd 100644 (file)
--- a/src/path.c
+++ b/src/path.c
@@ -39,6 +39,15 @@ static const UnitActiveState state_translation_table[_PATH_STATE_MAX] = {
         [PATH_FAILED] = UNIT_FAILED
 };
 
+static void path_init(Unit *u) {
+        Path *p = PATH(u);
+
+        assert(u);
+        assert(u->meta.load_state == UNIT_STUB);
+
+        p->directory_mode = 0755;
+}
+
 static void path_unwatch_one(Path *p, PathSpec *s) {
 
         if (s->inotify_fd < 0)
@@ -93,7 +102,7 @@ static int path_add_mount_links(Path *p) {
 
         assert(p);
 
-        LIST_FOREACH(units_per_type, other, p->meta.manager->units_per_type[UNIT_MOUNT])
+        LIST_FOREACH(units_by_type, other, p->meta.manager->units_by_type[UNIT_MOUNT])
                 if ((r = path_add_one_mount_link(p, (Mount*) other)) < 0)
                         return r;
 
@@ -169,9 +178,13 @@ static void path_dump(Unit *u, FILE *f, const char *prefix) {
 
         fprintf(f,
                 "%sPath State: %s\n"
-                "%sUnit: %s\n",
+                "%sUnit: %s\n"
+                "%sMakeDirectory: %s\n"
+                "%sDirectoryMode: %04o\n",
                 prefix, path_state_to_string(p->state),
-                prefix, p->unit->meta.id);
+                prefix, p->unit->meta.id,
+                prefix, yes_no(p->make_directory),
+                prefix, p->directory_mode);
 
         LIST_FOREACH(spec, s, p->specs)
                 fprintf(f,
@@ -184,6 +197,7 @@ static void path_dump(Unit *u, FILE *f, const char *prefix) {
 static int path_watch_one(Path *p, PathSpec *s) {
         static const int flags_table[_PATH_TYPE_MAX] = {
                 [PATH_EXISTS] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB,
+                [PATH_EXISTS_GLOB] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB,
                 [PATH_CHANGED] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CLOSE_WRITE|IN_CREATE|IN_DELETE|IN_MOVED_FROM|IN_MOVED_TO,
                 [PATH_DIRECTORY_NOT_EMPTY] = IN_DELETE_SELF|IN_MOVE_SELF|IN_ATTRIB|IN_CREATE|IN_MOVED_TO
         };
@@ -340,14 +354,11 @@ fail:
         dbus_error_free(&error);
 }
 
-
-static void path_enter_waiting(Path *p, bool initial, bool recheck) {
+static bool path_check_good(Path *p, bool initial) {
         PathSpec *s;
-        int r;
         bool good = false;
 
-        if (!recheck)
-                goto waiting;
+        assert(p);
 
         LIST_FOREACH(spec, s, p->specs) {
 
@@ -357,6 +368,10 @@ static void path_enter_waiting(Path *p, bool initial, bool recheck) {
                         good = access(s->path, F_OK) >= 0;
                         break;
 
+                case PATH_EXISTS_GLOB:
+                        good = glob_exists(s->path) > 0;
+                        break;
+
                 case PATH_DIRECTORY_NOT_EMPTY: {
                         int k;
 
@@ -382,16 +397,33 @@ static void path_enter_waiting(Path *p, bool initial, bool recheck) {
                         break;
         }
 
-        if (good) {
-                log_debug("%s got triggered.", p->meta.id);
-                path_enter_running(p);
-                return;
-        }
+        return good;
+}
+
+static void path_enter_waiting(Path *p, bool initial, bool recheck) {
+        int r;
+
+        if (recheck)
+                if (path_check_good(p, initial)) {
+                        log_debug("%s got triggered.", p->meta.id);
+                        path_enter_running(p);
+                        return;
+                }
 
-waiting:
         if ((r = path_watch(p)) < 0)
                 goto fail;
 
+        /* Hmm, so now we have created inotify watches, but the file
+         * might have appeared/been removed by now, so we must
+         * recheck */
+
+        if (recheck)
+                if (path_check_good(p, false)) {
+                        log_debug("%s got triggered.", p->meta.id);
+                        path_enter_running(p);
+                        return;
+                }
+
         path_set_state(p, PATH_WAITING);
         return;
 
@@ -400,6 +432,25 @@ fail:
         path_enter_dead(p, false);
 }
 
+static void path_mkdir(Path *p) {
+        PathSpec *s;
+
+        assert(p);
+
+        if (!p->make_directory)
+                return;
+
+        LIST_FOREACH(spec, s, p->specs) {
+                int r;
+
+                if (s->type == PATH_EXISTS || s->type == PATH_EXISTS_GLOB)
+                        continue;
+
+                if ((r = mkdir_p(s->path, p->directory_mode)) < 0)
+                        log_warning("mkdir(%s) failed: %s", s->path, strerror(-r));
+        }
+}
+
 static int path_start(Unit *u) {
         Path *p = PATH(u);
 
@@ -409,6 +460,8 @@ static int path_start(Unit *u) {
         if (p->unit->meta.load_state != UNIT_LOADED)
                 return -ENOENT;
 
+        path_mkdir(p);
+
         p->failure = false;
         path_enter_waiting(p, true, true);
 
@@ -507,8 +560,10 @@ static void path_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
                 goto fail;
         }
 
+        assert(l > 0);
+
         if (!(buf = malloc(l))) {
-                log_error("Failed to allocate buffer: %s", strerror(-ENOMEM));
+                log_error("Failed to allocate buffer: %s", strerror(ENOMEM));
                 goto fail;
         }
 
@@ -622,6 +677,7 @@ DEFINE_STRING_TABLE_LOOKUP(path_state, PathState);
 
 static const char* const path_type_table[_PATH_TYPE_MAX] = {
         [PATH_EXISTS] = "PathExists",
+        [PATH_EXISTS_GLOB] = "PathExistsGlob",
         [PATH_CHANGED] = "PathChanged",
         [PATH_DIRECTORY_NOT_EMPTY] = "DirectoryNotEmpty"
 };
@@ -630,7 +686,12 @@ DEFINE_STRING_TABLE_LOOKUP(path_type, PathType);
 
 const UnitVTable path_vtable = {
         .suffix = ".path",
+        .sections =
+                "Unit\0"
+                "Path\0"
+                "Install\0",
 
+        .init = path_init,
         .done = path_done,
         .load = path_load,