make in-place restarts use socket activation, too (for faster/less flaky tests)

include/i3.h

@@ -2,7 +2,7 @@
  * vim:ts=4:sw=4:expandtab
  *
  * i3 - an improved dynamic tiling window manager
- * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
+ * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
  *
  * i3.h: global variables that are used all over i3.
  *
@@ -30,6 +30,8 @@
 extern struct rlimit original_rlimit_core;
 /** Whether this version of i3 is a debug build or a release build. */
 extern bool debug_build;
+/** The number of file descriptors passed via socket activation. */
+extern int listen_fds;
 extern xcb_connection_t *conn;
 extern int conn_screen;
 /** The last timestamp we got from X11 (timestamps are included in some events

src/main.c

@@ -2,7 +2,7 @@
  * vim:ts=4:sw=4:expandtab
  *
  * i3 - an improved dynamic tiling window manager
- * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
+ * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
  *
  * main.c: Initialization, main loop
  *
@@ -28,6 +28,9 @@ struct rlimit original_rlimit_core;
 /* Whether this version of i3 is a debug build or a release build. */
 bool debug_build = false;
 
+/** The number of file descriptors passed via socket activation. */
+int listen_fds;
+
 static int xkb_event_base;
 
 int xkb_current_group;
@@ -662,14 +665,26 @@ int main(int argc, char *argv[]) {
     /* Also handle the UNIX domain sockets passed via socket activation. The
      * parameter 1 means "remove the environment variables", we don’t want to
      * pass these to child processes. */
-    int fds = sd_listen_fds(1);
+    listen_fds = sd_listen_fds(0);
-    if (fds < 0)
+    if (listen_fds < 0)
         ELOG("socket activation: Error in sd_listen_fds\n");
-    else if (fds == 0)
+    else if (listen_fds == 0)
         DLOG("socket activation: no sockets passed\n");
     else {
-        for (int fd = SD_LISTEN_FDS_START; fd < (SD_LISTEN_FDS_START + fds); fd++) {
+        int flags;
+        for (int fd = SD_LISTEN_FDS_START;
+             fd < (SD_LISTEN_FDS_START + listen_fds);
+             fd++) {
             DLOG("socket activation: also listening on fd %d\n", fd);
+
+            /* sd_listen_fds() enables FD_CLOEXEC by default.
+             * However, we need to keep the file descriptors open for in-place
+             * restarting, therefore we explicitly disable FD_CLOEXEC. */
+            if ((flags = fcntl(fd, F_GETFD)) < 0 ||
+                fcntl(fd, F_SETFD, flags & ~FD_CLOEXEC) < 0) {
+                ELOG("Could not disable FD_CLOEXEC on fd %d\n", fd);
+            }
+
             struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
             ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
             ev_io_start(main_loop, ipc_io);

src/startup.c

@@ -2,7 +2,7 @@
  * vim:ts=4:sw=4:expandtab
  *
  * i3 - an improved dynamic tiling window manager
- * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
+ * © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
  *
  * startup.c: Startup notification code. Ensures a startup notification context
  *            is setup when launching applications. We store the current
@@ -11,6 +11,7 @@
  *
  */
 #include "all.h"
+#include "sd-daemon.h"
 
 #include <sys/types.h>
 #include <sys/wait.h>
@@ -113,6 +114,15 @@ void start_application(const char *command, bool no_startup_id) {
         /* Child process */
         setsid();
         setrlimit(RLIMIT_CORE, &original_rlimit_core);
+        /* Close all socket activation file descriptors explicitly, we disabled
+         * FD_CLOEXEC to keep them open when restarting i3. */
+        for (int fd = SD_LISTEN_FDS_START;
+             fd < (SD_LISTEN_FDS_START + listen_fds);
+             fd++) {
+            close(fd);
+        }
+        unsetenv("LISTEN_PID");
+        unsetenv("LISTEN_FDS");
         if (fork() == 0) {
             /* Setup the environment variable(s) */
             if (!no_startup_id)

testcases/lib/i3test.pm

@@ -498,6 +498,9 @@ sub get_socket_path {
     my $cookie = $x->get_property(0, $x->get_root_window(), $atom->id, GET_PROPERTY_TYPE_ANY, 0, 256);
     my $reply = $x->get_property_reply($cookie->{sequence});
     my $socketpath = $reply->{value};
+    if ($socketpath eq "/tmp/nested-$ENV{DISPLAY}") {
+        $socketpath .= '-activation';
+    }
     $_cached_socket_path = $socketpath;
     return $socketpath;
 }

testcases/t/143-regress-floating-restart.t

@@ -15,7 +15,6 @@ is(scalar @{$ws->{nodes}}, 0, 'no tiling nodes');
 is(scalar @{$ws->{floating_nodes}}, 1, 'precisely one floating node');
 
 cmd 'restart';
-sleep 0.5;
 
 diag('Checking if i3 still lives');
 

testcases/t/150-regress-dock-restart.t

@@ -38,8 +38,6 @@ is($docknode->{rect}->{height}, 30, 'dock node has unchanged height');
 # perform an inplace-restart
 cmd 'restart';
 
-sleep 0.25;
-
 does_i3_live;
 
 
@@ -78,7 +76,6 @@ $docknode = $docked[0];
 is($docknode->{rect}->{height}, 20, 'dock node has unchanged height');
 
 cmd 'restart';
-sleep 0.25;
 
 @docked = get_dock_clients;
 is(@docked, 1, 'one dock client found');

testcases/t/161-regress-borders-restart.t

@@ -28,8 +28,6 @@ is(get_border_style(), '1pixel', 'border style 1pixel after changing');
 # perform an inplace-restart
 cmd 'restart';
 
-sleep 0.25;
-
 does_i3_live;
 
 is(get_border_style(), '1pixel', 'border style still 1pixel after restart');

testcases/t/168-regress-fullscreen-restart.t

@@ -17,7 +17,6 @@ cmd 'fullscreen';
 sync_with_i3;
 
 cmd 'restart';
-sleep 1;
 
 does_i3_live;
 

testcases/t/185-scratchpad.t

@@ -278,7 +278,6 @@ my $old_nodes = scalar @{$__i3_scratch->{nodes}};
 my $old_floating_nodes = scalar @{$__i3_scratch->{floating_nodes}};
 
 cmd 'restart';
-sleep 1;
 
 does_i3_live;
 

testcases/t/188-regress-focus-restart.t

@@ -20,7 +20,6 @@ is($focus->[0], $nodes->[0]->{id}, 'first node focused');
 is($focus->[1], $nodes->[1]->{id}, 'second node second in focus stack');
 
 cmd 'restart';
-sleep 1;
 
 does_i3_live;