source: trunk/libs/newlib/src/newlib/libc/sys/rdos/open.c @ 444

/*#######################################################################
# RDOS operating system
# Copyright (C) 1988-2006, Leif Ekblad
#
# This library is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
#
# The author of this program may be contacted at leif@rdos.net
#
# open.c                                                                
# open function implementation
#
##########################################################################*/

#include "config.h"
#include <_ansi.h>
#include <_syslist.h>
#include <fcntl.h>
#include <errno.h>
#include "rdos.h"
#include <stdarg.h>

int open(const char *file, int flags, ...)
{
        int handle;
        int pos;

        if (flags & O_CREAT)
                handle = RdosCreateFile(file, flags);
        else
                handle = RdosOpenFile(file, flags);

        if (handle >= 0)
        {
                if (flags & O_APPEND)
                {
                        pos = RdosGetFileSize(handle);
                        RdosSetFilePos(handle, pos);
                }

                if (flags & O_TRUNC)
                        RdosSetFileSize(handle, 0);
        
                return handle;
        }
        else
                return -1;
}