/* Copyright (c) 2019, 2022 Dennis Wölfing
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* libc/src/stdio/tmpfile.c
 * Create a temporary file. (C89)
 */

#define close __close
#define fdopen __fdopen
#define mkstemp __mkstemp
#define unlink __unlink
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

FILE* tmpfile(void) {
    char filename[] = "/tmp/tmpfileXXXXXX";
    int fd = mkstemp(filename);
    if (fd < 0) return NULL;
    unlink(filename);

    FILE* file = fdopen(fd, "");
    if (!file) {
        close(fd);
    }
    return file;
}
