1/*
2 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
3 * Use is subject to license terms.
4 */
5
6/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
7/*	  All Rights Reserved  	*/
8
9/*
10 * Copyright (c) 1980 Regents of the University of California.
11 * All rights reserved. The Berkeley software License Agreement
12 * specifies the terms and conditions for redistribution.
13 */
14
15#pragma ident	"%Z%%M%	%I%	%E% SMI"
16
17#include "refer..c"
18#define	move(x, y) close(y); dup(x); close(x);
19
20extern void err();
21
22int
23corout(char *in, char *out, char *rprog, char *arg, int outlen)
24{
25	int pipev[2], fr1, fr2, fw1, fw2, n;
26	int status;
27
28	pipe(pipev);
29	fr1 = pipev[0];
30	fw1 = pipev[1];
31	pipe(pipev);
32	fr2 = pipev[0];
33	fw2 = pipev[1];
34	if (fork() == 0) {
35		close(fw1);
36		close(fr2);
37		move(fr1, 0);
38		move(fw2, 1);
39		execl(rprog, "deliv", arg, 0);
40		err("Can't run %s", rprog);
41	}
42	close(fw2);
43	close(fr1);
44	write(fw1, in, strlen(in));
45	close(fw1);
46	wait(&status);
47	n = read(fr2, out, outlen);
48	out[n] = 0;
49	close(fr2);
50	return (n);
51}
52