xref: /titanic_52/usr/src/cmd/bnu/shio.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright 1988 Sun Microsystems, Inc.  All rights reserved.
24*7c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28*7c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
29*7c478bd9Sstevel@tonic-gate 
30*7c478bd9Sstevel@tonic-gate 
31*7c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
32*7c478bd9Sstevel@tonic-gate 
33*7c478bd9Sstevel@tonic-gate #include "uucp.h"
34*7c478bd9Sstevel@tonic-gate 
35*7c478bd9Sstevel@tonic-gate /*
36*7c478bd9Sstevel@tonic-gate  * use shell to execute command with
37*7c478bd9Sstevel@tonic-gate  * fi, fo, and fe as standard input/output/error
38*7c478bd9Sstevel@tonic-gate  *	cmd 	-> command to execute
39*7c478bd9Sstevel@tonic-gate  *	fi 	-> standard input
40*7c478bd9Sstevel@tonic-gate  *	fo 	-> standard output
41*7c478bd9Sstevel@tonic-gate  *	fe 	-> standard error
42*7c478bd9Sstevel@tonic-gate  * return:
43*7c478bd9Sstevel@tonic-gate  *	0		-> success
44*7c478bd9Sstevel@tonic-gate  *	non zero	-> failure  -  status from child
45*7c478bd9Sstevel@tonic-gate 			(Note - -1 means the fork failed)
46*7c478bd9Sstevel@tonic-gate  */
47*7c478bd9Sstevel@tonic-gate int
48*7c478bd9Sstevel@tonic-gate shio(cmd, fi, fo, fe)
49*7c478bd9Sstevel@tonic-gate char *cmd, *fi, *fo, *fe;
50*7c478bd9Sstevel@tonic-gate {
51*7c478bd9Sstevel@tonic-gate 	register pid_t pid, ret;
52*7c478bd9Sstevel@tonic-gate 	int status;
53*7c478bd9Sstevel@tonic-gate 
54*7c478bd9Sstevel@tonic-gate 	if (fi == NULL)
55*7c478bd9Sstevel@tonic-gate 		fi = "/dev/null";
56*7c478bd9Sstevel@tonic-gate 	if (fo == NULL)
57*7c478bd9Sstevel@tonic-gate 		fo = "/dev/null";
58*7c478bd9Sstevel@tonic-gate 	if (fe == NULL)
59*7c478bd9Sstevel@tonic-gate 		fe = "/dev/null";
60*7c478bd9Sstevel@tonic-gate 
61*7c478bd9Sstevel@tonic-gate 	DEBUG(3, "shio - %s\n", cmd);
62*7c478bd9Sstevel@tonic-gate 	if ((pid = fork()) == 0) {
63*7c478bd9Sstevel@tonic-gate 		(void) signal(SIGINT, SIG_IGN);
64*7c478bd9Sstevel@tonic-gate 		(void) signal(SIGHUP, SIG_IGN);
65*7c478bd9Sstevel@tonic-gate 		(void) signal(SIGQUIT, SIG_IGN);
66*7c478bd9Sstevel@tonic-gate 		ucloselog();
67*7c478bd9Sstevel@tonic-gate 		(void) close(Ifn);	/* close connection fd's */
68*7c478bd9Sstevel@tonic-gate 		(void) close(Ofn);
69*7c478bd9Sstevel@tonic-gate 		(void) close(0);	/* get stdin from file fi */
70*7c478bd9Sstevel@tonic-gate 		if (open(fi, 0) != 0)
71*7c478bd9Sstevel@tonic-gate 			exit(errno);
72*7c478bd9Sstevel@tonic-gate 		(void) close(1);	/* divert stdout to fo */
73*7c478bd9Sstevel@tonic-gate 		if (creat(fo, PUB_FILEMODE) != 1)
74*7c478bd9Sstevel@tonic-gate 			exit(errno);
75*7c478bd9Sstevel@tonic-gate 		(void) close(2);	/* divert stderr to fe */
76*7c478bd9Sstevel@tonic-gate 		if (creat(fe, PUB_FILEMODE) != 2)
77*7c478bd9Sstevel@tonic-gate 			exit(errno);
78*7c478bd9Sstevel@tonic-gate 		(void) execle(SHELL, "sh", "-c", cmd, (char *) 0, Env);
79*7c478bd9Sstevel@tonic-gate 		exit(100);
80*7c478bd9Sstevel@tonic-gate 	}
81*7c478bd9Sstevel@tonic-gate 
82*7c478bd9Sstevel@tonic-gate 	/*
83*7c478bd9Sstevel@tonic-gate 	 * the status returned from wait can never be -1
84*7c478bd9Sstevel@tonic-gate 	 * see man page wait(2)
85*7c478bd9Sstevel@tonic-gate 	 * So we use the -1 value to indicate fork failed
86*7c478bd9Sstevel@tonic-gate 	 * or the wait failed.
87*7c478bd9Sstevel@tonic-gate 	 */
88*7c478bd9Sstevel@tonic-gate 	if (pid == -1)
89*7c478bd9Sstevel@tonic-gate 		return(-1);
90*7c478bd9Sstevel@tonic-gate 
91*7c478bd9Sstevel@tonic-gate 	while ((ret = wait(&status)) != pid)
92*7c478bd9Sstevel@tonic-gate 	    if (ret == -1 && errno != EINTR)
93*7c478bd9Sstevel@tonic-gate 		return(-1);
94*7c478bd9Sstevel@tonic-gate 	DEBUG(3, "status %d\n", status);
95*7c478bd9Sstevel@tonic-gate 	return(status);
96*7c478bd9Sstevel@tonic-gate }
97