--- xinit-1.3.4/xinit.c.client-session	2014-03-25 18:20:26.000000000 +0900
+++ xinit-1.3.4/xinit.c	2014-11-22 20:11:16.301390109 +0900
@@ -89,6 +89,7 @@ char xserverrcbuf[256];
 
 #define TRUE 1
 #define FALSE 0
+#define ERR_EXIT 1
 
 static char *default_server = "X";
 static char *default_display = ":0";        /* choose most efficient */
@@ -560,6 +561,7 @@ startClient(char *client_argv[])
 {
     clientpid = fork();
     if (clientpid == 0) {
+		int fd;
         set_environment();
         setWindowPath();
 
@@ -567,7 +569,18 @@ startClient(char *client_argv[])
             Error("cannot change uid");
             _exit(EXIT_FAILURE);
         }
-        setpgid(0, getpid());
+
+		fd = open ("/dev/null", O_RDONLY);
+
+		if (fd < 0) {
+			Error("cannot open /dev/null: %s\n", strerror(errno));
+			_exit(ERR_EXIT);
+		}
+		close (STDIN_FILENO);
+		dup2 (fd, STDIN_FILENO);
+		close (fd);
+		setsid();
+
         Execute(client_argv);
         Error("Unable to run program \"%s\"", client_argv[0]);