Update READMEs per tinywl merge

tinywl/README

@@ -1,5 +0,0 @@
-                                     TinyWL
-
-Tiny Wayland compositor.
-
-Send patches to: ~sircmpwn/public-inbox@lists.sr.ht

tinywl/README.md

@@ -0,0 +1,33 @@
+# TinyWL
+
+This is the "minimum viable product" Wayland compositor based on wlroots. It
+aims to implement a Wayland compositor in the fewest lines of code possible,
+while still supporting a reasonable set of features. Reading this code is the
+best starting point for anyone looking to build their own Wayland compositor
+based on wlroots.
+
+## Building TinyWL
+
+TinyWL is disconencted from the main wlroots build system, in order to make it
+easier to understand the build requirements for your own Wayland compositors.
+Simply install the dependencies:
+
+- wlroots
+- wayland-protocols
+
+And run `make`.
+
+## Running TinyWL
+
+You can run TinyWL with `./tinywl`. In an existing Wayland or X11 session,
+tinywl will open a Wayland or X11 window respectively to act as a virtual
+display. You can then open Wayland windows by setting `WAYLAND_DISPLAY` to the
+value shown in the logs. You can also run `./tinywl` from a TTY.
+
+In either case, you will likely want to specify `-s [cmd]` to run a command at
+startup, such as a terminal emulator. This will be necessary to start any new
+programs from within the compositor, as TinyWL does not support any custom
+keybindings. TinyWL supports the following keybindings:
+
+- `Alt+Escape`: Terminate the compositor
+- `Alt+F1`: Cycle between windows

tinywl/tinywl.c

@@ -659,6 +659,8 @@ int main(int argc, char *argv[]) {
 			execl("/bin/sh", "/bin/sh", "-c", startup_cmd, (void *)NULL);
 		}
 	}
+	wlr_log(WLR_INFO, "Running Wayland compositor on WAYLAND_DISPLAY=%s",
+			socket);
 	wl_display_run(server.wl_display);
 
 	wl_display_destroy_clients(server.wl_display);