| Current Path : /usr/src/contrib/lukemftpd/src/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/contrib/lukemftpd/src/popen.c |
/* $NetBSD: popen.c,v 1.31 2006/02/01 14:20:14 christos Exp $ */
/*-
* Copyright (c) 1999-2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1988, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software written by Ken Arnold and
* published in UNIX Review, Vol. 6, No. 8.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)popen.c 8.3 (Berkeley) 4/6/94";
#else
__RCSID("$NetBSD: popen.c,v 1.31 2006/02/01 14:20:14 christos Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/wait.h>
#include <errno.h>
#include <glob.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stringlist.h>
#include <syslog.h>
#include <unistd.h>
#ifdef KERBEROS5
#include <krb5/krb5.h>
#endif
#include "extern.h"
#define INCR 100
/*
* Special version of popen which avoids call to shell. This ensures no-one
* may create a pipe to a hidden program as a side effect of a list or dir
* command.
* If stderrfd != -1, then send stderr of a read command there,
* otherwise close stderr.
*/
static int *pids;
static int fds;
extern int ls_main(int, char *[]);
FILE *
ftpd_popen(char *argv[], const char *ptype, int stderrfd)
{
FILE *iop;
int argc, pdes[2], pid, isls;
char **pop;
StringList *sl;
iop = NULL;
isls = 0;
if ((*ptype != 'r' && *ptype != 'w') || ptype[1])
return (NULL);
if (!pids) {
if ((fds = getdtablesize()) <= 0)
return (NULL);
if ((pids = (int *)malloc((u_int)(fds * sizeof(int)))) == NULL)
return (NULL);
memset(pids, 0, fds * sizeof(int));
}
if (pipe(pdes) < 0)
return (NULL);
if ((sl = sl_init()) == NULL)
goto pfree;
/* glob each piece */
if (sl_add(sl, ftpd_strdup(argv[0])) == -1)
goto pfree;
for (argc = 1; argv[argc]; argc++) {
glob_t gl;
int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE|GLOB_LIMIT;
memset(&gl, 0, sizeof(gl));
if (glob(argv[argc], flags, NULL, &gl)) {
if (sl_add(sl, ftpd_strdup(argv[argc])) == -1) {
globfree(&gl);
goto pfree;
}
} else {
for (pop = gl.gl_pathv; *pop; pop++) {
if (sl_add(sl, ftpd_strdup(*pop)) == -1) {
globfree(&gl);
goto pfree;
}
}
}
globfree(&gl);
}
if (sl_add(sl, NULL) == -1)
goto pfree;
#ifndef NO_INTERNAL_LS
isls = (strcmp(sl->sl_str[0], INTERNAL_LS) == 0);
#endif
pid = isls ? fork() : vfork();
switch (pid) {
case -1: /* error */
(void)close(pdes[0]);
(void)close(pdes[1]);
goto pfree;
/* NOTREACHED */
case 0: /* child */
if (*ptype == 'r') {
if (pdes[1] != STDOUT_FILENO) {
dup2(pdes[1], STDOUT_FILENO);
(void)close(pdes[1]);
}
if (stderrfd == -1)
(void)close(STDERR_FILENO);
else
dup2(stderrfd, STDERR_FILENO);
(void)close(pdes[0]);
} else {
if (pdes[0] != STDIN_FILENO) {
dup2(pdes[0], STDIN_FILENO);
(void)close(pdes[0]);
}
(void)close(pdes[1]);
}
#ifndef NO_INTERNAL_LS
if (isls) { /* use internal ls */
optreset = optind = optopt = 1;
closelog();
exit(ls_main(sl->sl_cur - 1, sl->sl_str));
}
#endif
execv(sl->sl_str[0], sl->sl_str);
_exit(1);
}
/* parent; assume fdopen can't fail... */
if (*ptype == 'r') {
iop = fdopen(pdes[0], ptype);
(void)close(pdes[1]);
} else {
iop = fdopen(pdes[1], ptype);
(void)close(pdes[0]);
}
pids[fileno(iop)] = pid;
pfree:
if (sl)
sl_free(sl, 1);
return (iop);
}
int
ftpd_pclose(FILE *iop)
{
int fdes, status;
pid_t pid;
sigset_t nsigset, osigset;
/*
* pclose returns -1 if stream is not associated with a
* `popened' command, or, if already `pclosed'.
*/
if (pids == 0 || pids[fdes = fileno(iop)] == 0)
return (-1);
(void)fclose(iop);
sigemptyset(&nsigset);
sigaddset(&nsigset, SIGINT);
sigaddset(&nsigset, SIGQUIT);
sigaddset(&nsigset, SIGHUP);
sigprocmask(SIG_BLOCK, &nsigset, &osigset);
while ((pid = waitpid(pids[fdes], &status, 0)) < 0 && errno == EINTR)
continue;
sigprocmask(SIG_SETMASK, &osigset, NULL);
pids[fdes] = 0;
if (pid < 0)
return (pid);
if (WIFEXITED(status))
return (WEXITSTATUS(status));
return (1);
}