1 /* $NetBSD: popen.c,v 1.31 2006/02/01 14:20:14 christos Exp $ */
4 * Copyright (c) 1999-2004 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
40 * Copyright (c) 1988, 1993, 1994
41 * The Regents of the University of California. All rights reserved.
43 * This code is derived from software written by Ken Arnold and
44 * published in UNIX Review, Vol. 6, No. 8.
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, this list of conditions and the following disclaimer.
51 * 2. Redistributions in binary form must reproduce the above copyright
52 * notice, this list of conditions and the following disclaimer in the
53 * documentation and/or other materials provided with the distribution.
54 * 3. Neither the name of the University nor the names of its contributors
55 * may be used to endorse or promote products derived from this software
56 * without specific prior written permission.
58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
72 #include <sys/cdefs.h>
75 static char sccsid[] = "@(#)popen.c 8.3 (Berkeley) 4/6/94";
77 __RCSID("$NetBSD: popen.c,v 1.31 2006/02/01 14:20:14 christos Exp $");
81 #include <sys/types.h>
82 #include <sys/param.h>
91 #include <stringlist.h>
96 #include <krb5/krb5.h>
103 * Special version of popen which avoids call to shell. This ensures no-one
104 * may create a pipe to a hidden program as a side effect of a list or dir
106 * If stderrfd != -1, then send stderr of a read command there,
107 * otherwise close stderr.
112 extern int ls_main(int, char *[]);
115 ftpd_popen(char *argv[], const char *ptype, int stderrfd)
118 int argc, pdes[2], pid, isls;
124 if ((*ptype != 'r' && *ptype != 'w') || ptype[1])
128 if ((fds = getdtablesize()) <= 0)
130 if ((pids = (int *)malloc((u_int)(fds * sizeof(int)))) == NULL)
132 memset(pids, 0, fds * sizeof(int));
137 if ((sl = sl_init()) == NULL)
140 /* glob each piece */
141 if (sl_add(sl, ftpd_strdup(argv[0])) == -1)
143 for (argc = 1; argv[argc]; argc++) {
145 int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE|GLOB_LIMIT;
147 memset(&gl, 0, sizeof(gl));
148 if (glob(argv[argc], flags, NULL, &gl)) {
149 if (sl_add(sl, ftpd_strdup(argv[argc])) == -1) {
154 for (pop = gl.gl_pathv; *pop; pop++) {
155 if (sl_add(sl, ftpd_strdup(*pop)) == -1) {
163 if (sl_add(sl, NULL) == -1)
166 #ifndef NO_INTERNAL_LS
167 isls = (strcmp(sl->sl_str[0], INTERNAL_LS) == 0);
170 pid = isls ? fork() : vfork();
173 (void)close(pdes[0]);
174 (void)close(pdes[1]);
179 if (pdes[1] != STDOUT_FILENO) {
180 dup2(pdes[1], STDOUT_FILENO);
181 (void)close(pdes[1]);
184 (void)close(STDERR_FILENO);
186 dup2(stderrfd, STDERR_FILENO);
187 (void)close(pdes[0]);
189 if (pdes[0] != STDIN_FILENO) {
190 dup2(pdes[0], STDIN_FILENO);
191 (void)close(pdes[0]);
193 (void)close(pdes[1]);
195 #ifndef NO_INTERNAL_LS
196 if (isls) { /* use internal ls */
197 optreset = optind = optopt = 1;
199 exit(ls_main(sl->sl_cur - 1, sl->sl_str));
203 execv(sl->sl_str[0], sl->sl_str);
206 /* parent; assume fdopen can't fail... */
208 iop = fdopen(pdes[0], ptype);
209 (void)close(pdes[1]);
211 iop = fdopen(pdes[1], ptype);
212 (void)close(pdes[0]);
214 pids[fileno(iop)] = pid;
223 ftpd_pclose(FILE *iop)
227 sigset_t nsigset, osigset;
230 * pclose returns -1 if stream is not associated with a
231 * `popened' command, or, if already `pclosed'.
233 if (pids == 0 || pids[fdes = fileno(iop)] == 0)
236 sigemptyset(&nsigset);
237 sigaddset(&nsigset, SIGINT);
238 sigaddset(&nsigset, SIGQUIT);
239 sigaddset(&nsigset, SIGHUP);
240 sigprocmask(SIG_BLOCK, &nsigset, &osigset);
241 while ((pid = waitpid(pids[fdes], &status, 0)) < 0 && errno == EINTR)
243 sigprocmask(SIG_SETMASK, &osigset, NULL);
247 if (WIFEXITED(status))
248 return (WEXITSTATUS(status));