refer3.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
/*
* Copyright (c) 1983, 1984 1985, 1986, 1987, 1988, Sun Microsystems, Inc.
* All Rights Reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "refer..c"
#define move(x, y) close(y); dup(x); close(x);
corout(in, out, rprog, arg, outlen)
char *in, *out, *rprog;
{
int pipev[2], fr1, fr2, fw1, fw2, n;
int status;
pipe(pipev);
fr1 = pipev[0];
fw1 = pipev[1];
pipe(pipev);
fr2 = pipev[0];
fw2 = pipev[1];
if (fork() == 0)
{
close(fw1);
close(fr2);
move(fr1, 0);
move(fw2, 1);
execl(rprog, "deliv", arg, 0);
err("Can't run %s", rprog);
}
close(fw2);
close(fr1);
write(fw1, in , strlen(in));
close(fw1);
wait(&status);
n = read(fr2, out, outlen);
out[n] = 0;
close(fr2);
return(n);
}