fcntl.c

Go to the documentation of this file.

/*!
 * \file msvc/fcntl.c
 *
 * \brief Wrapper functions for MSVC _open() and _creat() that convert
 * permission mode.
 *
 * SPDX-FileCopyrightText: 2025 GRASS Development Team
 * SPDX-License-Identifier: GPL-2.0-or-later
 *
 * \author Huidae Cho
 *
 * \date 2025
 */
 
#include <stdarg.h>
#include <fcntl.h>
#include <sys/stat.h>
 
#define O_TMPFILE O_TEMPORARY
 
int __open(const char *pathname, int flags, ...)
{
    if (flags & (O_CREAT | O_TMPFILE)) {
        va_list ap;
        int mode;
 
        va_start(ap, flags);
        mode = va_arg(ap, int);
        va_end(ap);
 
        return _open(pathname, flags,
                     (mode & 0400 ? _S_IREAD : 0) |
                         (mode & 0200 ? _S_IWRITE : 0));
    }
 
    return _open(pathname, flags);
}
 
int __creat(const char *pathname, int mode)
{
    return _creat(pathname,
                  (mode & 0400 ? _S_IREAD : 0) | (mode & 0200 ? _S_IWRITE : 0));
}