/*
 * Copyright (c) 2019 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * 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.
 *
 * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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 <config.h>

#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <errno.h>

#include <roken.h>

#ifndef O_APPEND
#define O_APPEND 0
#endif
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
#ifndef O_SYNC
#define O_SYNC 0
#endif

#ifndef HAVE_MKOSTEMP
ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
mkostemp(char *template, int flags)
{
    int fd = mkstemp(template);

    if (flags == 0)
        return fd;

    if ((flags & O_CLOEXEC))
        rk_cloexec(fd);

    /* fcntl F_SETFL O_APPEND and O_SYNC. */
#ifdef HAVE_FCNTL
    if ((flags & (O_APPEND | O_SYNC))) {
        int fl;

        if ((fl = fcntl(fd, F_GETFL)) == -1 ||
            fcntl(fd, F_SETFD, fl | (flags & (O_APPEND | O_SYNC))) == -1) {
            int save_errno = errno;

            (void) unlink(template);
            (void) close(fd);
            errno = save_errno;
            return -1;
        }
    }
#endif
    return fd;
}
#endif
