diff -up ksh-20120801/src/cmd/ksh93/sh/main.c.monintoron ksh-20120801/src/cmd/ksh93/sh/main.c
--- ksh-20120801/src/cmd/ksh93/sh/main.c.monintoron	2013-05-31 10:15:02.738828102 +0200
+++ ksh-20120801/src/cmd/ksh93/sh/main.c	2013-05-31 10:15:36.057095262 +0200
@@ -406,10 +406,10 @@ static void	exfile(register Shell_t *shp
 		{
 			buff.mode = SH_JMPEXIT;
 			sh_onoption(SH_TRACKALL);
-			sh_offoption(SH_MONITOR);
 		}
 		sh_offstate(SH_INTERACTIVE);
-		sh_offstate(SH_MONITOR);
+		if(sh_isoption(SH_MONITOR))
+			sh_onstate(SH_MONITOR);
 		sh_offstate(SH_HISTORY);
 		sh_offoption(SH_HISTORY);
 	}
diff -up ksh-20120801/src/cmd/ksh93/sh/jobs.c.orig ksh-20120801/src/cmd/ksh93/sh/jobs.c
--- ksh-20120801/src/cmd/ksh93/sh/jobs.c.orig	2013-05-31 10:12:28.358590452 +0200
+++ ksh-20120801/src/cmd/ksh93/sh/jobs.c	2013-05-31 10:16:51.203697890 +0200
@@ -548,7 +548,7 @@ int job_reap(register int sig)
 		{
 			px = job_byjid((int)pw->p_job);
 			for(; px && (px->p_flag&P_DONE); px=px->p_nxtproc);
-			if(!px)
+			if(!px && sh_isoption(SH_INTERACTIVE))
 				tcsetpgrp(JOBTTY,job.mypid);
 		}
 #ifndef SHOPT_BGX
@@ -842,10 +842,11 @@ static void job_set(register struct proc
 
 static void job_reset(register struct process *pw)
 {
+	Shell_t *shp = pw->p_shp;
 	/* save the terminal state for current job */
 #ifdef SIGTSTP
 	job_fgrp(pw,tcgetpgrp(job.fd));
-	if(tcsetpgrp(job.fd,job.mypid) !=0)
+	if(sh_isoption(SH_INTERACTIVE) && tcsetpgrp(job.fd,job.mypid) !=0)
 		return;
 #endif	/* SIGTSTP */
 	/* force the following tty_get() to do a tcgetattr() unless fg */
diff -up ksh-20120801/src/cmd/ksh93/sh/xec.c.orig ksh-20120801/src/cmd/ksh93/sh/xec.c
--- ksh-20120801/src/cmd/ksh93/sh/xec.c.orig	2013-05-31 10:12:27.000000000 +0200
+++ ksh-20120801/src/cmd/ksh93/sh/xec.c	2013-05-31 10:18:14.650367185 +0200
@@ -2201,7 +2201,7 @@ int sh_exec(register const Shnode_t *t,
 			}
 			shp->exitval = n;
 #ifdef SIGTSTP
-			if(!pipejob && sh_isstate(SH_MONITOR))
+			if(!pipejob && sh_isstate(SH_MONITOR) && sh_isoption(SH_INTERACTIVE))
 				tcsetpgrp(JOBTTY,shp->gd->pid);
 #endif /*SIGTSTP */
 			job.curpgid = savepgid;