1 files changed, 89 insertions, 0 deletions
diff --git a/src/core/path.h b/src/core/path.h
new file mode 100644
index 0000000..cb5b662
--- /dev/null
+++ b/src/core/path.h
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+typedef struct Path Path;
+typedef struct PathSpec PathSpec;
+typedef struct ActivationDetailsPath ActivationDetailsPath;
+
+#include "unit.h"
+
+typedef enum PathType {
+        PATH_EXISTS,
+        PATH_EXISTS_GLOB,
+        PATH_DIRECTORY_NOT_EMPTY,
+        PATH_CHANGED,
+        PATH_MODIFIED,
+        _PATH_TYPE_MAX,
+        _PATH_TYPE_INVALID = -EINVAL,
+} PathType;
+
+typedef struct PathSpec {
+        Unit *unit;
+
+        char *path;
+
+        sd_event_source *event_source;
+
+        LIST_FIELDS(struct PathSpec, spec);
+
+        PathType type;
+        int inotify_fd;
+        int primary_wd;
+
+        bool previous_exists;
+} PathSpec;
+
+int path_spec_watch(PathSpec *s, sd_event_io_handler_t handler);
+void path_spec_unwatch(PathSpec *s);
+int path_spec_fd_event(PathSpec *s, uint32_t events);
+void path_spec_done(PathSpec *s);
+
+static inline bool path_spec_owns_inotify_fd(PathSpec *s, int fd) {
+        return s->inotify_fd == fd;
+}
+
+typedef enum PathResult {
+        PATH_SUCCESS,
+        PATH_FAILURE_RESOURCES,
+        PATH_FAILURE_START_LIMIT_HIT,
+        PATH_FAILURE_UNIT_START_LIMIT_HIT,
+        PATH_FAILURE_TRIGGER_LIMIT_HIT,
+        _PATH_RESULT_MAX,
+        _PATH_RESULT_INVALID = -EINVAL,
+} PathResult;
+
+struct Path {
+        Unit meta;
+
+        LIST_HEAD(PathSpec, specs);
+
+        PathState state, deserialized_state;
+
+        bool make_directory;
+        mode_t directory_mode;
+
+        PathResult result;
+
+        RateLimit trigger_limit;
+
+        sd_event_source *trigger_notify_event_source;
+};
+
+struct ActivationDetailsPath {
+        ActivationDetails meta;
+        char *trigger_path_filename;
+};
+
+void path_free_specs(Path *p);
+
+extern const UnitVTable path_vtable;
+extern const ActivationDetailsVTable activation_details_path_vtable;
+
+const char* path_type_to_string(PathType i) _const_;
+PathType path_type_from_string(const char *s) _pure_;
+
+const char* path_result_to_string(PathResult i) _const_;
+PathResult path_result_from_string(const char *s) _pure_;
+
+DEFINE_CAST(PATH, Path);
+DEFINE_ACTIVATION_DETAILS_CAST(ACTIVATION_DETAILS_PATH, ActivationDetailsPath, PATH);