/*
 * 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 1988 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

#include "uucp.h"

/*
 * use shell to execute command with
 * fi, fo, and fe as standard input/output/error
 *      cmd     -> command to execute
 *      fi      -> standard input
 *      fo      -> standard output
 *      fe      -> standard error
 * return:
 *      0               -> success
 *      non zero        -> failure  -  status from child
                        (Note - -1 means the fork failed)
 */
int
shio(cmd, fi, fo, fe)
char *cmd, *fi, *fo, *fe;
{
        register pid_t pid, ret;
        int status;

        if (fi == NULL)
                fi = "/dev/null";
        if (fo == NULL)
                fo = "/dev/null";
        if (fe == NULL)
                fe = "/dev/null";

        DEBUG(3, "shio - %s\n", cmd);
        if ((pid = fork()) == 0) {
                (void) signal(SIGINT, SIG_IGN);
                (void) signal(SIGHUP, SIG_IGN);
                (void) signal(SIGQUIT, SIG_IGN);
                ucloselog();
                (void) close(Ifn);      /* close connection fd's */
                (void) close(Ofn);
                (void) close(0);        /* get stdin from file fi */
                if (open(fi, 0) != 0)
                        exit(errno);
                (void) close(1);        /* divert stdout to fo */
                if (creat(fo, PUB_FILEMODE) != 1)
                        exit(errno);
                (void) close(2);        /* divert stderr to fe */
                if (creat(fe, PUB_FILEMODE) != 2)
                        exit(errno);
                (void) execle(SHELL, "sh", "-c", cmd, (char *) 0, Env);
                exit(100);
        }

        /*
         * the status returned from wait can never be -1
         * see man page wait(3C)
         * So we use the -1 value to indicate fork failed
         * or the wait failed.
         */
        if (pid == -1)
                return(-1);

        while ((ret = wait(&status)) != pid)
            if (ret == -1 && errno != EINTR)
                return(-1);
        DEBUG(3, "status %d\n", status);
        return(status);
}