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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 2005 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.
*/
/*
* openchild.c
*
* 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 <stdio.h>
#include <stdlib.h>
#include <strings.h>
static char *basename(char *);
static char SHELL[] = "/bin/sh";
/*
* returns pid, or -1 for failure
*/
int
_openchild(char *command, FILE **fto, FILE **ffrom)
{
int i;
int pid;
int pdto[2];
int pdfrom[2];
char *com;
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) close(0);
(void) dup(pdto[0]);
(void) close(1);
(void) dup(pdfrom[1]);
/*
* adding this closelog for bug id 1238429
*/
closelog();
closefrom(3);
com = malloc((unsigned)strlen(command) + 6);
if (com == NULL) {
exit(1);
}
(void) sprintf(com, "exec %s", command);
execl(SHELL, basename(SHELL), "-c", com, NULL);
exit(1);
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:
printf("openchild: error3");
(void) close(pdfrom[0]);
(void) close(pdfrom[1]);
error2:
printf("openchild: error2");
(void) close(pdto[0]);
(void) close(pdto[1]);
error1:
printf("openchild: error1");
return (-1);
}
static char *
basename(char *path)
{
char *p;
p = strrchr(path, '/');
if (p == NULL) {
return (path);
} else {
return (p + 1);
}
}
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