diff -up at-3.1.11/atd.8.in.dont_fork at-3.1.11/atd.8.in

--- at-3.1.11/atd.8.in.dont_fork	2009-08-14 18:49:05.000000000 +0200

+++ at-3.1.11/atd.8.in	2009-10-01 13:03:18.799878107 +0200

@@ -1,4 +1,4 @@

-.TH ATD 8 "Mar 1997" local "Linux Programmer's Manual"

+.TH ATD 8 "Sep 2009" at-3.1.11 "Linux Programmer's Manual"

 .SH NAME

 atd \- run jobs queued for later execution

 .SH SYNOPSIS

@@ -9,6 +9,7 @@ atd \- run jobs queued for later executi

 .IR batch_interval ]

 .RB [ -d ]

 .RB [ -s ]

+.RB [ -n ]

 .SH DESCRIPTION

 .B atd

 runs jobs queued by

@@ -45,6 +46,9 @@ A script invoking

 is installed as

 .B @prefix@/sbin/atrun

 for backward compatibility.

++.TP 8

++.B -n

++Don't fork option.

 .SH WARNING

 .B atd

 won't work if its spool directory is mounted via NFS even if

diff -up at-3.1.11/atd.c.dont_fork at-3.1.11/atd.c

--- at-3.1.11/atd.c.dont_fork	2009-10-01 13:03:18.000000000 +0200

+++ at-3.1.11/atd.c	2009-10-01 13:04:55.289631298 +0200

@@ -729,7 +729,7 @@ main(int argc, char *argv[])

     run_as_daemon = 1;

     batch_interval = BATCH_INTERVAL_DEFAULT;

-    while ((c = getopt(argc, argv, "sdl:b:")) != EOF) {

+    while ((c = getopt(argc, argv, "sdl:b:n")) != EOF) {

 	switch (c) {

 	case 'l':

 	    if (sscanf(optarg, "%lf", &load_avg) != 1)

@@ -744,7 +744,10 @@ main(int argc, char *argv[])

 	    break;

 	case 'd':

 	    daemon_debug++;

-	    break;

+        /* go through another option*/

+   case 'n':

+        daemon_nofork++;

+        break;

 	case 's':

 	    run_as_daemon = 0;

diff -up at-3.1.11/daemon.c.dont_fork at-3.1.11/daemon.c

--- at-3.1.11/daemon.c.dont_fork	2009-08-14 18:49:05.000000000 +0200

+++ at-3.1.11/daemon.c	2009-10-01 13:03:18.800878165 +0200

@@ -48,7 +48,8 @@

 #include "daemon.h"

 #include "privs.h"

-int daemon_debug;

+int daemon_debug = 0;

+int daemon_nofork = 0;

 static int

 lock_fd(int fd)

@@ -117,15 +118,18 @@ daemon_setup()

 	    (open("/dev/null", O_RDWR) != 2)) {

 	    perr("Error redirecting I/O");

 	}

+    }

+    if (daemon_nofork) pid = getpid();

+    else {

 	pid = fork();

 	if (pid == -1) {

 	    perr("Cannot fork");

 	} else if (pid != 0) {

 	    exit(0);

 	}

+	(void) setsid();

     }

     old_umask = umask(S_IWGRP | S_IWOTH);

-    (void) setsid();

     PRIV_START

diff -up at-3.1.11/daemon.h.dont_fork at-3.1.11/daemon.h

--- at-3.1.11/daemon.h.dont_fork	2009-08-14 18:49:05.000000000 +0200

+++ at-3.1.11/daemon.h	2009-10-01 13:03:18.801877593 +0200

@@ -14,3 +14,4 @@ __attribute__((noreturn))

 perr (const char *fmt, ...);

 extern int daemon_debug;

+extern int daemon_nofork;