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diff -up ksh-20120801/src/cmd/ksh93/sh/io.c.sufix ksh-20120801/src/cmd/ksh93/sh/io.c
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--- ksh-20120801/src/cmd/ksh93/sh/io.c.sufix	2014-04-08 14:30:14.412343555 +0200
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+++ ksh-20120801/src/cmd/ksh93/sh/io.c	2014-04-08 14:31:18.403876587 +0200
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@@ -2144,6 +2144,7 @@ static int	io_prompt(Shell_t *shp,Sfio_t
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 			}
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 #endif	/* TIOCLBIC */
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 			cp = sh_mactry(shp,nv_getval(sh_scoped(shp,PS1NOD)));
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+			shp->exitval = 0;
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 			for(;c= *cp;cp++)
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 			{
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 				if(c==HIST_CHAR)