1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 1996 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
28*0Sstevel@tonic-gate /* All Rights Reserved */
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate /*
31*0Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988
32*0Sstevel@tonic-gate * The Regents of the University of California
33*0Sstevel@tonic-gate * All Rights Reserved
34*0Sstevel@tonic-gate *
35*0Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from
36*0Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its
37*0Sstevel@tonic-gate * contributors.
38*0Sstevel@tonic-gate */
39*0Sstevel@tonic-gate
40*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate #include "ftp_var.h"
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate #ifndef sigmask
45*0Sstevel@tonic-gate #define sigmask(m) (1 << ((m)-1))
46*0Sstevel@tonic-gate #endif
47*0Sstevel@tonic-gate
48*0Sstevel@tonic-gate #define set2mask(setp) ((setp)->__sigbits[0])
49*0Sstevel@tonic-gate #define mask2set(mask, setp) \
50*0Sstevel@tonic-gate ((mask) == -1 ? sigfillset(setp) : (((setp)->__sigbits[0]) = (mask)))
51*0Sstevel@tonic-gate
52*0Sstevel@tonic-gate
53*0Sstevel@tonic-gate static int
sigsetmask(int mask)54*0Sstevel@tonic-gate sigsetmask(int mask)
55*0Sstevel@tonic-gate {
56*0Sstevel@tonic-gate sigset_t oset;
57*0Sstevel@tonic-gate sigset_t nset;
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate (void) sigprocmask(0, (sigset_t *)0, &nset);
60*0Sstevel@tonic-gate mask2set(mask, &nset);
61*0Sstevel@tonic-gate (void) sigprocmask(SIG_SETMASK, &nset, &oset);
62*0Sstevel@tonic-gate return (set2mask(&oset));
63*0Sstevel@tonic-gate }
64*0Sstevel@tonic-gate
65*0Sstevel@tonic-gate static int
sigblock(int mask)66*0Sstevel@tonic-gate sigblock(int mask)
67*0Sstevel@tonic-gate {
68*0Sstevel@tonic-gate sigset_t oset;
69*0Sstevel@tonic-gate sigset_t nset;
70*0Sstevel@tonic-gate
71*0Sstevel@tonic-gate (void) sigprocmask(0, (sigset_t *)0, &nset);
72*0Sstevel@tonic-gate mask2set(mask, &nset);
73*0Sstevel@tonic-gate (void) sigprocmask(SIG_BLOCK, &nset, &oset);
74*0Sstevel@tonic-gate return (set2mask(&oset));
75*0Sstevel@tonic-gate }
76*0Sstevel@tonic-gate
77*0Sstevel@tonic-gate #define signal(s, f) sigset(s, f)
78*0Sstevel@tonic-gate
79*0Sstevel@tonic-gate #define tst(a, b) (*mode == 'r'? (b) : (a))
80*0Sstevel@tonic-gate #define RDR 0
81*0Sstevel@tonic-gate #define WTR 1
82*0Sstevel@tonic-gate #define NOFILES 20 /* just in case */
83*0Sstevel@tonic-gate
84*0Sstevel@tonic-gate static pid_t *popen_pid;
85*0Sstevel@tonic-gate static rlim_t nfiles = 0;
86*0Sstevel@tonic-gate
87*0Sstevel@tonic-gate FILE *
mypopen(char * cmd,char * mode)88*0Sstevel@tonic-gate mypopen(char *cmd, char *mode)
89*0Sstevel@tonic-gate {
90*0Sstevel@tonic-gate int p[2];
91*0Sstevel@tonic-gate pid_t pid;
92*0Sstevel@tonic-gate int myside, remside, i;
93*0Sstevel@tonic-gate struct rlimit rl;
94*0Sstevel@tonic-gate
95*0Sstevel@tonic-gate if (nfiles <= 0) {
96*0Sstevel@tonic-gate if (getrlimit(RLIMIT_NOFILE, &rl) == 0)
97*0Sstevel@tonic-gate nfiles = rl.rlim_max;
98*0Sstevel@tonic-gate else
99*0Sstevel@tonic-gate nfiles = NOFILES;
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate if (popen_pid == NULL) {
102*0Sstevel@tonic-gate popen_pid = (pid_t *)malloc((unsigned)nfiles *
103*0Sstevel@tonic-gate sizeof (*popen_pid));
104*0Sstevel@tonic-gate if (popen_pid == NULL)
105*0Sstevel@tonic-gate return (NULL);
106*0Sstevel@tonic-gate for (i = 0; i < nfiles; i++)
107*0Sstevel@tonic-gate popen_pid[i] = (pid_t)-1;
108*0Sstevel@tonic-gate }
109*0Sstevel@tonic-gate if (pipe(p) < 0)
110*0Sstevel@tonic-gate return (NULL);
111*0Sstevel@tonic-gate myside = tst(p[WTR], p[RDR]);
112*0Sstevel@tonic-gate remside = tst(p[RDR], p[WTR]);
113*0Sstevel@tonic-gate if ((pid = vfork()) == 0) {
114*0Sstevel@tonic-gate /* myside and remside reverse roles in child */
115*0Sstevel@tonic-gate (void) close(myside);
116*0Sstevel@tonic-gate if (remside != tst(0, 1)) {
117*0Sstevel@tonic-gate (void) dup2(remside, tst(0, 1));
118*0Sstevel@tonic-gate (void) close(remside);
119*0Sstevel@tonic-gate }
120*0Sstevel@tonic-gate execl("/bin/sh", "sh", "-c", cmd, (char *)NULL);
121*0Sstevel@tonic-gate _exit(127);
122*0Sstevel@tonic-gate }
123*0Sstevel@tonic-gate if (pid == (pid_t)-1) {
124*0Sstevel@tonic-gate (void) close(myside);
125*0Sstevel@tonic-gate (void) close(remside);
126*0Sstevel@tonic-gate return (NULL);
127*0Sstevel@tonic-gate }
128*0Sstevel@tonic-gate popen_pid[myside] = pid;
129*0Sstevel@tonic-gate (void) close(remside);
130*0Sstevel@tonic-gate return (fdopen(myside, mode));
131*0Sstevel@tonic-gate }
132*0Sstevel@tonic-gate
133*0Sstevel@tonic-gate /*ARGSUSED*/
134*0Sstevel@tonic-gate static void
pabort(int sig)135*0Sstevel@tonic-gate pabort(int sig)
136*0Sstevel@tonic-gate {
137*0Sstevel@tonic-gate extern int mflag;
138*0Sstevel@tonic-gate
139*0Sstevel@tonic-gate mflag = 0;
140*0Sstevel@tonic-gate }
141*0Sstevel@tonic-gate
142*0Sstevel@tonic-gate int
mypclose(FILE * ptr)143*0Sstevel@tonic-gate mypclose(FILE *ptr)
144*0Sstevel@tonic-gate {
145*0Sstevel@tonic-gate pid_t child, pid;
146*0Sstevel@tonic-gate int omask;
147*0Sstevel@tonic-gate void (*istat)();
148*0Sstevel@tonic-gate int status;
149*0Sstevel@tonic-gate
150*0Sstevel@tonic-gate child = popen_pid[fileno(ptr)];
151*0Sstevel@tonic-gate popen_pid[fileno(ptr)] = (pid_t)-1;
152*0Sstevel@tonic-gate (void) fclose(ptr);
153*0Sstevel@tonic-gate if (child == (pid_t)-1)
154*0Sstevel@tonic-gate return (-1);
155*0Sstevel@tonic-gate istat = signal(SIGINT, pabort);
156*0Sstevel@tonic-gate omask = sigblock(sigmask(SIGQUIT)|sigmask(SIGHUP));
157*0Sstevel@tonic-gate while ((pid = wait(&status)) != child && pid != (pid_t)-1)
158*0Sstevel@tonic-gate ;
159*0Sstevel@tonic-gate (void) sigsetmask(omask);
160*0Sstevel@tonic-gate (void) signal(SIGINT, istat);
161*0Sstevel@tonic-gate return (pid == (pid_t)-1 ? -1 : 0);
162*0Sstevel@tonic-gate }
163