3 files changed, 60 insertions, 8 deletions

diff --git a/include/session/direct-ipc.h b/include/session/direct-ipc.h
new file mode 100644
index 00000000..96504f04
--- /dev/null
+++ b/include/session/direct-ipc.h
@@ -0,0 +1,12 @@
+#ifndef SESSION_DIRECT_IPC
+#define SESSION_DIRECT_IPC
+
+#include <sys/types.h>
+
+int direct_ipc_open(int sock, const char *path);
+void direct_ipc_setmaster(int sock, int fd);
+void direct_ipc_dropmaster(int sock, int fd);
+void direct_ipc_finish(int sock, pid_t pid);
+int direct_ipc_start(pid_t *pid_out);
+
+#endif
diff --git a/include/wlr/session.h b/include/wlr/session.h
index 4a5b2174..7961e620 100644
--- a/include/wlr/session.h
+++ b/include/wlr/session.h
@@ -9,16 +9,57 @@ struct session_impl;
 
 struct wlr_session {
 	const struct session_impl *impl;
-
-	bool active;
+	/*
+	 * Signal for when the session becomes active/inactive.
+	 * It's called when we swap virtual terminal.
+	 */
 	struct wl_signal session_signal;
+	bool active;
+
+	int drm_fd;
+	unsigned vtnr;
+	char seat[8];
 };
 
+/*
+ * Opens a session, taking control of the current virtual terminal.
+ * This should not be called if another program is already in control
+ * of the terminal (Xorg, another Wayland compositor, etc.).
+ *
+ * If logind support is not enabled, you must have CAP_SYS_ADMIN or be root.
+ * It is safe to drop priviledges after this is called.
+ *
+ * Returns NULL on error.
+ */
 struct wlr_session *wlr_session_start(struct wl_display *disp);
+
+/*
+ * Closes a previously opened session and restores the virtual terminal.
+ * You should call wlr_session_close_file on each files you opened
+ * with wlr_session_open_file before you call this.
+ */
 void wlr_session_finish(struct wlr_session *session);
-int wlr_session_open_file(struct wlr_session *restrict session,
-		const char *restrict path);
+
+/*
+ * Opens the file at path.
+ * This can only be used to open DRM or evdev (input) devices.
+ *
+ * When the session becomes inactive:
+ * - DRM files lose their DRM master status
+ * - evdev files become invalid and should be closed
+ *
+ * Returns -errno on error.
+ */
+int wlr_session_open_file(struct wlr_session *session, const char *path);
+
+/*
+ * Closes a file previously opened with wlr_session_open_file.
+ */
 void wlr_session_close_file(struct wlr_session *session, int fd);
-bool wlr_session_change_vt(struct wlr_session *session, int vt);
+
+/*
+ * Changes the virtual terminal.
+ */
+bool wlr_session_change_vt(struct wlr_session *session, unsigned vt);
 
 #endif
diff --git a/include/wlr/session/interface.h b/include/wlr/session/interface.h
index f75acfa4..4938110d 100644
--- a/include/wlr/session/interface.h
+++ b/include/wlr/session/interface.h
@@ -6,10 +6,9 @@
 struct session_impl {
 	struct wlr_session *(*start)(struct wl_display *disp);
 	void (*finish)(struct wlr_session *session);
-	int (*open)(struct wlr_session *restrict session,
-			const char *restrict path);
+	int (*open)(struct wlr_session *session, const char *path);
 	void (*close)(struct wlr_session *session, int fd);
-	bool (*change_vt)(struct wlr_session *session, int vt);
+	bool (*change_vt)(struct wlr_session *session, unsigned vt);
 };
 
 #endif