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 1996 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) 1983, 1984, 1985, 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  *	University Copyright- Copyright (c) 1982, 1986, 1988
32*7c478bd9Sstevel@tonic-gate  *	The Regents of the University of California
33*7c478bd9Sstevel@tonic-gate  *	All Rights Reserved
34*7c478bd9Sstevel@tonic-gate  *
35*7c478bd9Sstevel@tonic-gate  *	University Acknowledgment- Portions of this document are derived from
36*7c478bd9Sstevel@tonic-gate  *	software developed by the University of California, Berkeley, and its
37*7c478bd9Sstevel@tonic-gate  *	contributors.
38*7c478bd9Sstevel@tonic-gate  */
39*7c478bd9Sstevel@tonic-gate 
40*7c478bd9Sstevel@tonic-gate #include "ftp_var.h"
41*7c478bd9Sstevel@tonic-gate 
42*7c478bd9Sstevel@tonic-gate #ifndef sigmask
43*7c478bd9Sstevel@tonic-gate #define	sigmask(m)	(1 << ((m)-1))
44*7c478bd9Sstevel@tonic-gate #endif
45*7c478bd9Sstevel@tonic-gate 
46*7c478bd9Sstevel@tonic-gate #define	set2mask(setp) ((setp)->__sigbits[0])
47*7c478bd9Sstevel@tonic-gate #define	mask2set(mask, setp) \
48*7c478bd9Sstevel@tonic-gate 	((mask) == -1 ? sigfillset(setp) : (((setp)->__sigbits[0]) = (mask)))
49*7c478bd9Sstevel@tonic-gate 
50*7c478bd9Sstevel@tonic-gate 
51*7c478bd9Sstevel@tonic-gate static int
sigsetmask(int mask)52*7c478bd9Sstevel@tonic-gate sigsetmask(int mask)
53*7c478bd9Sstevel@tonic-gate {
54*7c478bd9Sstevel@tonic-gate 	sigset_t oset;
55*7c478bd9Sstevel@tonic-gate 	sigset_t nset;
56*7c478bd9Sstevel@tonic-gate 
57*7c478bd9Sstevel@tonic-gate 	(void) sigprocmask(0, (sigset_t *)0, &nset);
58*7c478bd9Sstevel@tonic-gate 	mask2set(mask, &nset);
59*7c478bd9Sstevel@tonic-gate 	(void) sigprocmask(SIG_SETMASK, &nset, &oset);
60*7c478bd9Sstevel@tonic-gate 	return (set2mask(&oset));
61*7c478bd9Sstevel@tonic-gate }
62*7c478bd9Sstevel@tonic-gate 
63*7c478bd9Sstevel@tonic-gate static int
sigblock(int mask)64*7c478bd9Sstevel@tonic-gate sigblock(int mask)
65*7c478bd9Sstevel@tonic-gate {
66*7c478bd9Sstevel@tonic-gate 	sigset_t oset;
67*7c478bd9Sstevel@tonic-gate 	sigset_t nset;
68*7c478bd9Sstevel@tonic-gate 
69*7c478bd9Sstevel@tonic-gate 	(void) sigprocmask(0, (sigset_t *)0, &nset);
70*7c478bd9Sstevel@tonic-gate 	mask2set(mask, &nset);
71*7c478bd9Sstevel@tonic-gate 	(void) sigprocmask(SIG_BLOCK, &nset, &oset);
72*7c478bd9Sstevel@tonic-gate 	return (set2mask(&oset));
73*7c478bd9Sstevel@tonic-gate }
74*7c478bd9Sstevel@tonic-gate 
75*7c478bd9Sstevel@tonic-gate #define	signal(s, f)	sigset(s, f)
76*7c478bd9Sstevel@tonic-gate 
77*7c478bd9Sstevel@tonic-gate #define	tst(a, b)	(*mode == 'r'? (b) : (a))
78*7c478bd9Sstevel@tonic-gate #define	RDR		0
79*7c478bd9Sstevel@tonic-gate #define	WTR		1
80*7c478bd9Sstevel@tonic-gate #define	NOFILES		20	/* just in case */
81*7c478bd9Sstevel@tonic-gate 
82*7c478bd9Sstevel@tonic-gate static	pid_t *popen_pid;
83*7c478bd9Sstevel@tonic-gate static	rlim_t nfiles = 0;
84*7c478bd9Sstevel@tonic-gate 
85*7c478bd9Sstevel@tonic-gate FILE *
mypopen(char * cmd,char * mode)86*7c478bd9Sstevel@tonic-gate mypopen(char *cmd, char *mode)
87*7c478bd9Sstevel@tonic-gate {
88*7c478bd9Sstevel@tonic-gate 	int p[2];
89*7c478bd9Sstevel@tonic-gate 	pid_t pid;
90*7c478bd9Sstevel@tonic-gate 	int myside, remside, i;
91*7c478bd9Sstevel@tonic-gate 	struct rlimit rl;
92*7c478bd9Sstevel@tonic-gate 
93*7c478bd9Sstevel@tonic-gate 	if (nfiles <= 0) {
94*7c478bd9Sstevel@tonic-gate 		if (getrlimit(RLIMIT_NOFILE, &rl) == 0)
95*7c478bd9Sstevel@tonic-gate 			nfiles = rl.rlim_max;
96*7c478bd9Sstevel@tonic-gate 		else
97*7c478bd9Sstevel@tonic-gate 			nfiles = NOFILES;
98*7c478bd9Sstevel@tonic-gate 	}
99*7c478bd9Sstevel@tonic-gate 	if (popen_pid == NULL) {
100*7c478bd9Sstevel@tonic-gate 		popen_pid = (pid_t *)malloc((unsigned)nfiles *
101*7c478bd9Sstevel@tonic-gate 		    sizeof (*popen_pid));
102*7c478bd9Sstevel@tonic-gate 		if (popen_pid == NULL)
103*7c478bd9Sstevel@tonic-gate 			return (NULL);
104*7c478bd9Sstevel@tonic-gate 		for (i = 0; i < nfiles; i++)
105*7c478bd9Sstevel@tonic-gate 			popen_pid[i] = (pid_t)-1;
106*7c478bd9Sstevel@tonic-gate 	}
107*7c478bd9Sstevel@tonic-gate 	if (pipe(p) < 0)
108*7c478bd9Sstevel@tonic-gate 		return (NULL);
109*7c478bd9Sstevel@tonic-gate 	myside = tst(p[WTR], p[RDR]);
110*7c478bd9Sstevel@tonic-gate 	remside = tst(p[RDR], p[WTR]);
111*7c478bd9Sstevel@tonic-gate 	if ((pid = vfork()) == 0) {
112*7c478bd9Sstevel@tonic-gate 		/* myside and remside reverse roles in child */
113*7c478bd9Sstevel@tonic-gate 		(void) close(myside);
114*7c478bd9Sstevel@tonic-gate 		if (remside != tst(0, 1)) {
115*7c478bd9Sstevel@tonic-gate 			(void) dup2(remside, tst(0, 1));
116*7c478bd9Sstevel@tonic-gate 			(void) close(remside);
117*7c478bd9Sstevel@tonic-gate 		}
118*7c478bd9Sstevel@tonic-gate 		execl("/bin/sh", "sh", "-c", cmd, (char *)NULL);
119*7c478bd9Sstevel@tonic-gate 		_exit(127);
120*7c478bd9Sstevel@tonic-gate 	}
121*7c478bd9Sstevel@tonic-gate 	if (pid == (pid_t)-1) {
122*7c478bd9Sstevel@tonic-gate 		(void) close(myside);
123*7c478bd9Sstevel@tonic-gate 		(void) close(remside);
124*7c478bd9Sstevel@tonic-gate 		return (NULL);
125*7c478bd9Sstevel@tonic-gate 	}
126*7c478bd9Sstevel@tonic-gate 	popen_pid[myside] = pid;
127*7c478bd9Sstevel@tonic-gate 	(void) close(remside);
128*7c478bd9Sstevel@tonic-gate 	return (fdopen(myside, mode));
129*7c478bd9Sstevel@tonic-gate }
130*7c478bd9Sstevel@tonic-gate 
131*7c478bd9Sstevel@tonic-gate /*ARGSUSED*/
132*7c478bd9Sstevel@tonic-gate static void
pabort(int sig)133*7c478bd9Sstevel@tonic-gate pabort(int sig)
134*7c478bd9Sstevel@tonic-gate {
135*7c478bd9Sstevel@tonic-gate 	extern int mflag;
136*7c478bd9Sstevel@tonic-gate 
137*7c478bd9Sstevel@tonic-gate 	mflag = 0;
138*7c478bd9Sstevel@tonic-gate }
139*7c478bd9Sstevel@tonic-gate 
140*7c478bd9Sstevel@tonic-gate int
mypclose(FILE * ptr)141*7c478bd9Sstevel@tonic-gate mypclose(FILE *ptr)
142*7c478bd9Sstevel@tonic-gate {
143*7c478bd9Sstevel@tonic-gate 	pid_t child, pid;
144*7c478bd9Sstevel@tonic-gate 	int omask;
145*7c478bd9Sstevel@tonic-gate 	void (*istat)();
146*7c478bd9Sstevel@tonic-gate 	int status;
147*7c478bd9Sstevel@tonic-gate 
148*7c478bd9Sstevel@tonic-gate 	child = popen_pid[fileno(ptr)];
149*7c478bd9Sstevel@tonic-gate 	popen_pid[fileno(ptr)] = (pid_t)-1;
150*7c478bd9Sstevel@tonic-gate 	(void) fclose(ptr);
151*7c478bd9Sstevel@tonic-gate 	if (child == (pid_t)-1)
152*7c478bd9Sstevel@tonic-gate 		return (-1);
153*7c478bd9Sstevel@tonic-gate 	istat = signal(SIGINT, pabort);
154*7c478bd9Sstevel@tonic-gate 	omask = sigblock(sigmask(SIGQUIT)|sigmask(SIGHUP));
155*7c478bd9Sstevel@tonic-gate 	while ((pid = wait(&status)) != child && pid != (pid_t)-1)
156*7c478bd9Sstevel@tonic-gate 		;
157*7c478bd9Sstevel@tonic-gate 	(void) sigsetmask(omask);
158*7c478bd9Sstevel@tonic-gate 	(void) signal(SIGINT, istat);
159*7c478bd9Sstevel@tonic-gate 	return (pid == (pid_t)-1 ? -1 : 0);
160*7c478bd9Sstevel@tonic-gate }
161