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