From a83e7699e75cad515019aa1ad5f7d59ee236a918 Mon Sep 17 00:00:00 2001
From: Axel Wagner <mail@merovius.de>
Date: Wed, 25 Aug 2010 18:31:03 +0200
Subject: [PATCH] Send the child SIGSTOPs and SIGCONTs

---
 i3bar/include/child.h | 12 ++++++++++++
 i3bar/src/child.c     | 22 +++++++++++++++++++++-
 i3bar/src/xcb.c       |  3 +++
 3 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/i3bar/include/child.h b/i3bar/include/child.h
index 0405816d..69cfc576 100644
--- a/i3bar/include/child.h
+++ b/i3bar/include/child.h
@@ -26,4 +26,16 @@ void start_child(char *command);
  */
 void kill_child();
 
+/*
+ * Sends a SIGSTOP to the child-process (if existent)
+ *
+ */
+void stop_child();
+
+/*
+ * Sends a SIGCONT to the child-process (if existent)
+ *
+ */
+void cont_child();
+
 #endif
diff --git a/i3bar/src/child.c b/i3bar/src/child.c
index 2b0fb780..4be5d12d 100644
--- a/i3bar/src/child.c
+++ b/i3bar/src/child.c
@@ -176,7 +176,7 @@ void start_child(char *command) {
 }
 
 /*
- * kill()s the child-prozess (if existend) and closes and
+ * kill()s the child-process (if existent) and closes and
  * free()s the stdin- and sigchild-watchers
  *
  */
@@ -186,3 +186,23 @@ void kill_child() {
     }
     cleanup();
 }
+
+/*
+ * Sends a SIGSTOP to the child-process (if existent)
+ *
+ */
+void stop_child() {
+    if (child_pid != 0) {
+        kill(child_pid, SIGSTOP);
+    }
+}
+
+/*
+ * Sends a SIGCONT to the child-process (if existent)
+ *
+ */
+void cont_child() {
+    if (child_pid != 0) {
+        kill(child_pid, SIGCONT);
+    }
+}
diff --git a/i3bar/src/xcb.c b/i3bar/src/xcb.c
index 9494b389..f5a50686 100644
--- a/i3bar/src/xcb.c
+++ b/i3bar/src/xcb.c
@@ -76,6 +76,7 @@ void hide_bars() {
     SLIST_FOREACH(walk, outputs, slist) {
         xcb_unmap_window(xcb_connection, walk->bar);
     }
+    stop_child();
 }
 
 /*
@@ -89,6 +90,8 @@ void unhide_bars() {
     uint32_t            mask;
     uint32_t            values[4];
 
+    cont_child();
+
     SLIST_FOREACH(walk, outputs, slist) {
         if (walk->bar == XCB_NONE) {
             continue;
-- 
2.39.5