From d11d45f19fff4ff8e9fe0d9e5efcf06f71f8f9da Mon Sep 17 00:00:00 2001
From: Philip Allison <sane@not.co.uk>
Date: Wed, 23 Apr 2008 15:03:27 +0100
Subject: [PATCH] Add options for window sticking and backgrounding

Window will set stickiness (show on all desktops) hint if
"-stick" option is given, and will by default try to fork
into the background, overridden by "-nobg".

Signed-off-by: Philip Allison <sane@not.co.uk>
---
 src/cteddy.cxx | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/src/cteddy.cxx b/src/cteddy.cxx
index 3012fe9..bb8dddd 100644
--- a/src/cteddy.cxx
+++ b/src/cteddy.cxx
@@ -23,6 +23,8 @@
 // Language headers
 #include <string>
 #include <iostream>
+#include <cstring>
+#include <cerrno>
 
 // Library headers
 #include <gtk/gtk.h>
@@ -31,6 +33,7 @@
 // System headers
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <fcntl.h>
 #include <unistd.h>
 
 
@@ -130,6 +133,12 @@ int main (int argc, char* argv[])
 	// Whether or not to set the window's keep-on-top hint
 	bool ontop = false;
 
+	// Whether or not the window's sticky hint should be set
+	bool sticky = false;
+
+	// Whether or not to fork into the background
+	bool background = true;
+
 	// Mimic the image loading behaviour of xteddy, to an extent.
 	{
 		// Start from the name of the executable itself
@@ -153,6 +162,12 @@ int main (int argc, char* argv[])
 			// Allow keep-on-top
 			else if (strncmp(argv[i], "-float", 6) == 0)
 				ontop = true;
+			// Allow sticking to all desktops
+			else if (strncmp(argv[i], "-stick", 6) == 0)
+				sticky = true;
+			// Allow disablement of backgrounding
+			else if (strncmp(argv[i], "-nobg", 5) == 0)
+				background = false;
 		}
 		
 		// If the given path contains slashes, assume it is absolute or
@@ -314,10 +329,66 @@ int main (int argc, char* argv[])
 	// Don't steal input focus when we start
 	g_object_set(G_OBJECT(window), "focus-on-map", false, NULL);
 	
+	// Honour float & sticky options
 	if (ontop)
 		gtk_window_set_keep_above(GTK_WINDOW(window), true);
+	if (sticky)
+		gtk_window_stick(GTK_WINDOW(window));
 	
 	gtk_widget_show_all(window);
+
+	// Fork into background if desired
+	if (background)
+	{
+		pid_t p = fork();
+		if (p < 0)
+		{
+			std::cerr << "Could not fork: " << strerror(errno) << std::endl;
+			return 1;
+		}
+		else if (p == 0)
+		{
+			// Close stdin
+			while (close(0) != 0)
+			{
+				if (errno == EINTR)
+					continue;
+				std::cerr << "Could not close stdin: " << strerror(errno) << std::endl;
+				return 1;
+			}
+			// Redirect stdout & stderr to /dev/null
+			int nullfd;
+			while ((nullfd = open("/dev/null", O_WRONLY)) < 0)
+			{
+				if (errno == EINTR)
+					continue;
+				std::cerr << "Cannot open /dev/null: " << strerror(errno) << std::endl;
+				return 1;
+			}
+			while (dup2(nullfd, 1) < 0)
+			{
+				if (errno == EINTR)
+					continue;
+				std::cerr << "Cannot redirect stdout to /dev/null: " << strerror(errno) << std::endl;
+				return 1;
+			}
+			while (dup2(nullfd, 2) < 0)
+			{
+				if (errno == EINTR)
+					continue;
+				std::cerr << "Cannot redirect stderr to /dev/null: " << strerror(errno) << std::endl;
+				return 1;
+			}
+			// Create new process session
+			if (setsid() < 0)
+			{
+				std::cerr << "Cannot create new session: " << strerror(errno) << std::endl;
+				return 1;
+			}
+		}
+		else
+			return 0;
+	}
 	
 	gtk_main();
 	
-- 
2.11.4.GIT