1*11a8fa6cSceastha /*
2*11a8fa6cSceastha * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
3*11a8fa6cSceastha * Use is subject to license terms.
4*11a8fa6cSceastha */
5*11a8fa6cSceastha
67c478bd9Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
77c478bd9Sstevel@tonic-gate /* All Rights Reserved */
87c478bd9Sstevel@tonic-gate
97c478bd9Sstevel@tonic-gate /*
107c478bd9Sstevel@tonic-gate * Copyright (c) 1980 Regents of the University of California.
117c478bd9Sstevel@tonic-gate * All rights reserved. The Berkeley software License Agreement
127c478bd9Sstevel@tonic-gate * specifies the terms and conditions for redistribution.
137c478bd9Sstevel@tonic-gate */
147c478bd9Sstevel@tonic-gate
157c478bd9Sstevel@tonic-gate #include "refer..c"
16*11a8fa6cSceastha #define move(x, y) close(y); dup(x); close(x);
17*11a8fa6cSceastha
18*11a8fa6cSceastha extern void err();
197c478bd9Sstevel@tonic-gate
20*11a8fa6cSceastha int
corout(char * in,char * out,char * rprog,char * arg,int outlen)21*11a8fa6cSceastha corout(char *in, char *out, char *rprog, char *arg, int outlen)
227c478bd9Sstevel@tonic-gate {
237c478bd9Sstevel@tonic-gate int pipev[2], fr1, fr2, fw1, fw2, n;
247c478bd9Sstevel@tonic-gate int status;
257c478bd9Sstevel@tonic-gate
26*11a8fa6cSceastha pipe(pipev);
27*11a8fa6cSceastha fr1 = pipev[0];
287c478bd9Sstevel@tonic-gate fw1 = pipev[1];
29*11a8fa6cSceastha pipe(pipev);
30*11a8fa6cSceastha fr2 = pipev[0];
317c478bd9Sstevel@tonic-gate fw2 = pipev[1];
32*11a8fa6cSceastha if (fork() == 0) {
33*11a8fa6cSceastha close(fw1);
347c478bd9Sstevel@tonic-gate close(fr2);
357c478bd9Sstevel@tonic-gate move(fr1, 0);
367c478bd9Sstevel@tonic-gate move(fw2, 1);
377c478bd9Sstevel@tonic-gate execl(rprog, "deliv", arg, 0);
387c478bd9Sstevel@tonic-gate err("Can't run %s", rprog);
397c478bd9Sstevel@tonic-gate }
40*11a8fa6cSceastha close(fw2);
417c478bd9Sstevel@tonic-gate close(fr1);
42*11a8fa6cSceastha write(fw1, in, strlen(in));
437c478bd9Sstevel@tonic-gate close(fw1);
447c478bd9Sstevel@tonic-gate wait(&status);
457c478bd9Sstevel@tonic-gate n = read(fr2, out, outlen);
467c478bd9Sstevel@tonic-gate out[n] = 0;
477c478bd9Sstevel@tonic-gate close(fr2);
48*11a8fa6cSceastha return (n);
497c478bd9Sstevel@tonic-gate }
50