Ultrix-3.1/src/cmd/learn/makpipe.c

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/**********************************************************************
 *   Copyright (c) Digital Equipment Corporation 1984, 1985, 1986.    *
 *   All Rights Reserved. 					      *
 *   Reference "/usr/src/COPYRIGHT" for applicable restrictions.      *
 **********************************************************************/

static char Sccsid[] = "@(#)makpipe.c	3.0	4/21/86";
#include "stdio.h"

makpipe()
{
	int f[2];

	pipe(f);
	if (fork()==0) {
		close(f[1]);
		close(0);
		dup(f[0]);
		close(f[0]);
		execl ("/bin/sh", "sh", "-i", 0);
		execl ("/usr/bin/sh", "sh", "-i", 0);
		write(2,"Exec error\n",11);
	}
	close(f[0]);
	sleep(2);	/* so shell won't eat up too much input */
	return(f[1]);
}