main: allow --sock (control/debug socket) in headless mode

The control socket was only opened on the windowed path, so a --headless
GB couldn't be inspected. A scriptable, invisible GB is exactly the one
you most want to peek into - reading kernel WRAM over the debug socket is
how the TCP field-offset corruption got pinned down. Open it in the
headless loop too and poll it each frame; close it on exit.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
index e95ab95..0dec4df 100644
--- a/src/main.c
+++ b/src/main.c
@@ -251,6 +251,14 @@ int main(int argc, char **argv) {
         gb->serial_in_fd  = STDIN_FILENO;
         gb->serial_no_eof = (keys != NULL);   // OSK provides input; don't EOF-exit
         }
+        // --sock works headless too: a scriptable GB you can also debug
+        // (read/write memory, breakpoints, button injection) is far more
+        // useful than one you can't see into.
+        if (sock_path) {
+            control_open(sock_path);
+            if (control_active())
+                fprintf(stderr, "control socket: %s\n", sock_path);
+        }
         int keys_frame = 0;
         int fl = fcntl(STDIN_FILENO, F_GETFL, 0);
         if (fl != -1) fcntl(STDIN_FILENO, F_SETFL, fl | O_NONBLOCK);
@@ -280,6 +288,7 @@ int main(int argc, char **argv) {
                 gb->buttons = keys_mask(keys, keys_frame);
                 if (keys_frame++ > (int)strlen(keys) * 20 + 40) break;
             }
+            if (sock_path && !control_poll(gb)) break;   // debug socket quit
             run_frame(gb);              // advance ~a frame's worth of cycles
             if (!uncapped) {
                 double target = start_t + (gb->cycles - start_cyc) / HZ;
@@ -294,6 +303,7 @@ int main(int argc, char **argv) {
             }
         }
         if (raw_tty) tcsetattr(STDIN_FILENO, TCSANOW, &saved_tio);
+        control_close();
         fprintf(stderr, "[sl0pboy] headless loop exit: %s\n",
                 gb->poweroff ? "guest poweroff" : "signal");
         if (shot_frames >= 0) {          // --headless --shot FILE: dump final LCD