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truncate.c
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truncate.c
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/*
This file is part of PlibC.
(C) 2005 Nils Durner (and other contributing authors)
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
*/
/**
* @file src/truncate.c
* @brief truncate()
*/
#include "plibc_private.h"
/**
* @author Prof. A Olowofoyeku (The African Chief)
* @author Frank Heckenbach
* @author Nils Durner
* @see http://gd.tuwien.ac.at/gnu/mingw/os-hacks.h
*/
int truncate(const char *fname, int distance)
{
int i;
HANDLE hFile;
char pszFile[_MAX_PATH + 1];
long lRet;
errno = 0;
if ((lRet = plibc_conv_to_win_path(fname, pszFile)) != ERROR_SUCCESS)
{
SetErrnoFromWinError(lRet);
return -1;
}
i = -1;
hFile = CreateFile(pszFile, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL);
if(hFile != INVALID_HANDLE_VALUE)
{
if(SetFilePointer(hFile, distance, NULL, FILE_BEGIN) != 0xFFFFFFFF)
{
if(SetEndOfFile(hFile))
i = 0;
}
CloseHandle(hFile);
}
return i;
}
int _win_ftruncate(int fildes, off_t length)
{
return chsize(fildes, length);
}
/* end of truncate.c */