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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Portions of this source code were derived from Berkeley
* 4.3 BSD under license from the Regents of the University of
* California.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Open two pipes to a child process, one for reading, one for writing. The
* pipes are accessed by FILE pointers. This is NOT a public interface, but
* for internal use only!
*/
#include "mt.h"
#include <stdio.h>
#include <sys/types.h>
#include <rpc/types.h>
#include <unistd.h>
#include <stdlib.h>
#include "rpc_mt.h"
/*
* returns pid, or -1 for failure
*/
int
__rpc_openchild(char *command, FILE **fto, FILE **ffrom)
{
int pid;
int pdto[2];
int pdfrom[2];
if (pipe(pdto) < 0)
goto error1;
if (pipe(pdfrom) < 0)
goto error2;
switch (pid = fork()) {
case -1:
goto error3;
case 0:
/*
* child: read from pdto[0], write into pdfrom[1]
*/
(void) dup2(pdto[0], 0);
(void) dup2(pdfrom[1], 1);
closefrom(3);
(void) fflush(stderr);
(void) execlp(command, command, 0);
perror("exec");
_exit(~0);
default:
/*
* parent: write into pdto[1], read from pdfrom[0]
*/
*fto = fdopen(pdto[1], "w");
(void) close(pdto[0]);
*ffrom = fdopen(pdfrom[0], "r");
(void) close(pdfrom[1]);
break;
}
return (pid);
/*
* error cleanup and return
*/
error3:
(void) close(pdfrom[0]);
(void) close(pdfrom[1]);
error2:
(void) close(pdto[0]);
(void) close(pdto[1]);
error1:
return (-1);
}
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