/* $NetBSD: dbfile.c,v 1.2 2018/01/04 20:57:29 kamil Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
* All rights reserved.
*
* 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.
*
* 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.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
__RCSID("$NetBSD: dbfile.c,v 1.2 2018/01/04 20:57:29 kamil Exp $");
#include "namespace.h"
#include <sys/stat.h>
#include <stdio.h>
#include <fcntl.h>
#include <signal.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <paths.h>
#include <db.h>
int
__dbopen(const char *file, int flags, mode_t mode, struct stat *sb)
{
int fd;
int serrno;
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
if ((fd = open(file, flags | O_CLOEXEC, mode)) == -1)
return -1;
#if O_CLOEXEC == 0
if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
goto out;
#endif
if (sb && fstat(fd, sb) == -1)
goto out;
return fd;
out:
serrno = errno;
close(fd);
errno = serrno;
return -1;
}
int
__dbtemp(const char *prefix, struct stat *sb)
{
sigset_t set, oset;
int len;
int fd, serrno;
char *envtmp;
char path[PATH_MAX];
if (issetugid())
envtmp = NULL;
else
envtmp = getenv("TMPDIR");
len = snprintf(path, sizeof(path), "%s/%sXXXXXX",
envtmp ? envtmp : _PATH_TMP, prefix);
if ((size_t)len >= sizeof(path)) {
errno = ENAMETOOLONG;
return -1;
}
(void)sigfillset(&set);
(void)sigprocmask(SIG_BLOCK, &set, &oset);
if ((fd = mkstemp(path)) != -1) {
if (unlink(path) == -1)
goto out;
if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
goto out;
if (sb && fstat(fd, sb) == -1)
goto out;
}
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
return fd;
out:
serrno = errno;
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
close(fd);
errno = serrno;
return -1;
}