path: add .path unit type for monitoring files

[elogind.git] / src / path.h

diff --git a/src/path.h b/src/path.h
new file mode 100644 (file)
index 0000000..21a7dc4
--- /dev/null
+++ b/src/path.h
@@ -0,0 +1,85 @@
+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+#ifndef foopathhfoo
+#define foopathhfoo
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+typedef struct Path Path;
+
+#include "unit.h"
+#include "mount.h"
+
+typedef enum PathState {
+        PATH_DEAD,
+        PATH_WAITING,
+        PATH_RUNNING,
+        PATH_MAINTAINANCE,
+        _PATH_STATE_MAX,
+        _PATH_STATE_INVALID = -1
+} PathState;
+
+typedef enum PathType {
+        PATH_EXISTS,
+        PATH_DIRECTORY_NOT_EMPTY,
+        PATH_CHANGED,
+        _PATH_TYPE_MAX,
+        _PATH_TYPE_INVALID = -1
+} PathType;
+
+typedef struct PathSpec {
+        PathType type;
+        char *path;
+
+        int inotify_fd;
+        int primary_wd;
+        bool previous_exists;
+
+        Watch watch;
+
+        LIST_FIELDS(struct PathSpec, spec);
+} PathSpec;
+
+struct Path {
+        Meta meta;
+
+        LIST_HEAD(PathSpec, specs);
+
+        PathState state, deserialized_state;
+        Unit *unit;
+
+        bool failure;
+};
+
+void path_unit_notify(Unit *u, UnitActiveState new_state);
+
+/* Called from the mount code figure out if a mount is a dependency of
+ * any of the paths of this path object */
+int path_add_one_mount_link(Path *p, Mount *m);
+
+extern const UnitVTable path_vtable;
+
+const char* path_state_to_string(PathState i);
+PathState path_state_from_string(const char *s);
+
+const char* path_type_to_string(PathType i);
+PathType path_type_from_string(const char *s);
+
+#endif