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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright 1988 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
     28 /*	  All Rights Reserved  	*/
     29 
     30 
     31 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     32 
     33 #include "uucp.h"
     34 
     35 /*
     36  * use shell to execute command with
     37  * fi, fo, and fe as standard input/output/error
     38  *	cmd 	-> command to execute
     39  *	fi 	-> standard input
     40  *	fo 	-> standard output
     41  *	fe 	-> standard error
     42  * return:
     43  *	0		-> success
     44  *	non zero	-> failure  -  status from child
     45 			(Note - -1 means the fork failed)
     46  */
     47 int
     48 shio(cmd, fi, fo, fe)
     49 char *cmd, *fi, *fo, *fe;
     50 {
     51 	register pid_t pid, ret;
     52 	int status;
     53 
     54 	if (fi == NULL)
     55 		fi = "/dev/null";
     56 	if (fo == NULL)
     57 		fo = "/dev/null";
     58 	if (fe == NULL)
     59 		fe = "/dev/null";
     60 
     61 	DEBUG(3, "shio - %s\n", cmd);
     62 	if ((pid = fork()) == 0) {
     63 		(void) signal(SIGINT, SIG_IGN);
     64 		(void) signal(SIGHUP, SIG_IGN);
     65 		(void) signal(SIGQUIT, SIG_IGN);
     66 		ucloselog();
     67 		(void) close(Ifn);	/* close connection fd's */
     68 		(void) close(Ofn);
     69 		(void) close(0);	/* get stdin from file fi */
     70 		if (open(fi, 0) != 0)
     71 			exit(errno);
     72 		(void) close(1);	/* divert stdout to fo */
     73 		if (creat(fo, PUB_FILEMODE) != 1)
     74 			exit(errno);
     75 		(void) close(2);	/* divert stderr to fe */
     76 		if (creat(fe, PUB_FILEMODE) != 2)
     77 			exit(errno);
     78 		(void) execle(SHELL, "sh", "-c", cmd, (char *) 0, Env);
     79 		exit(100);
     80 	}
     81 
     82 	/*
     83 	 * the status returned from wait can never be -1
     84 	 * see man page wait(2)
     85 	 * So we use the -1 value to indicate fork failed
     86 	 * or the wait failed.
     87 	 */
     88 	if (pid == -1)
     89 		return(-1);
     90 
     91 	while ((ret = wait(&status)) != pid)
     92 	    if (ret == -1 && errno != EINTR)
     93 		return(-1);
     94 	DEBUG(3, "status %d\n", status);
     95 	return(status);
     96 }
     97