/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 * 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 <assert.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <syscall.h>
#include <unistd.h>

extern "C" {

mode_t umask(mode_t mask)
{
    return syscall(SC_umask, mask);
}

int mkdir(const char* pathname, mode_t mode)
{
    if (!pathname) {
        errno = EFAULT;
        return -1;
    }
    int rc = syscall(SC_mkdir, pathname, strlen(pathname), mode);
    __RETURN_WITH_ERRNO(rc, rc, -1);
}

int chmod(const char* pathname, mode_t mode)
{
    if (!pathname) {
        errno = EFAULT;
        return -1;
    }
    int rc = syscall(SC_chmod, pathname, strlen(pathname), mode);
    __RETURN_WITH_ERRNO(rc, rc, -1);
}

int fchmod(int fd, mode_t mode)
{
    int rc = syscall(SC_fchmod, fd, mode);
    __RETURN_WITH_ERRNO(rc, rc, -1);
}

int mkfifo(const char* pathname, mode_t mode)
{
    return mknod(pathname, mode | S_IFIFO, 0);
}

static int do_stat(const char* path, struct stat* statbuf, bool follow_symlinks)
{
    if (!path) {
        errno = EFAULT;
        return -1;
    }
    Syscall::SC_stat_params params { { path, strlen(path) }, statbuf, follow_symlinks };
    int rc = syscall(SC_stat, &params);
    __RETURN_WITH_ERRNO(rc, rc, -1);
}

int lstat(const char* path, struct stat* statbuf)
{
    return do_stat(path, statbuf, false);
}

int stat(const char* path, struct stat* statbuf)
{
    return do_stat(path, statbuf, true);
}

int fstat(int fd, struct stat* statbuf)
{
    int rc = syscall(SC_fstat, fd, statbuf);
    __RETURN_WITH_ERRNO(rc, rc, -1);
}
}