X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/tripe/blobdiff_plain/410c8acf139e945dce28bbc0c8b17dcfd0815643..2ab54e099dbb3827aa61d170e8cd3fda83b373ae:/util.c

diff --git a/util.c b/util.c
index 4dd6f351..54890b3f 100644
--- a/util.c
+++ b/util.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: util.c,v 1.1 2001/02/03 20:26:37 mdw Exp $
+ * $Id: util.c,v 1.2 2001/02/22 09:07:08 mdw Exp $
  *
  * Utilities for the client and the server
  *
@@ -29,6 +29,9 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: util.c,v $
+ * Revision 1.2  2001/02/22 09:07:08  mdw
+ * Separate detach-from-terminal code into a separate function.
+ *
  * Revision 1.1  2001/02/03 20:26:37  mdw
  * Initial checkin.
  *
@@ -51,23 +54,18 @@
 
 /*----- Main code ---------------------------------------------------------*/
 
-/* --- @u_daemon@ --- *
+/* --- @u_detach@ --- *
  *
  * Arguments:	---
  *
- * Returns:	Zero if OK, nonzero on failure.
+ * Returns:	---
  *
- * Use:		Becomes a daemon.
+ * Use:		Detaches from the current terminal and ensures it can never
+ *		acquire a new one.  Calls @fork@.
  */
 
-int u_daemon(void)
+void u_detach(void)
 {
-  pid_t kid;
-
-  if ((kid = fork()) < 0)
-    return (-1);
-  if (kid)
-    _exit(0);
 #ifdef TIOCNOTTY
   {
     int fd;
@@ -78,9 +76,28 @@ int u_daemon(void)
   }
 #endif
   setsid();
-
   if (fork() > 0)
     _exit(0);
+}
+
+/* --- @u_daemon@ --- *
+ *
+ * Arguments:	---
+ *
+ * Returns:	Zero if OK, nonzero on failure.
+ *
+ * Use:		Becomes a daemon.
+ */
+
+int u_daemon(void)
+{
+  pid_t kid;
+
+  if ((kid = fork()) < 0)
+    return (-1);
+  if (kid)
+    _exit(0);
+  u_detach();
   return (0);
 }