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/* ftruncate for SVR4 using the fcntl F_FREESP command.
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
/* Truncate the file FD refers to to LENGTH bytes. */
int
DEFUN(ftruncate, (fd, length),
int fd AND off_t length)
{
struct flock fl;
memset (&fl, 0, sizeof fl);
fl.l_type = F_WRLCK;
fl.l_start = length;
return fcntl (fd, F_FREESP, &fl);
}
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