55 lines
988 B
C++
55 lines
988 B
C++
/* fhandler_dev_zero.cc: code to access /dev/zero
|
|
|
|
Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009 Red Hat, Inc.
|
|
|
|
Written by DJ Delorie (dj@cygnus.com)
|
|
|
|
This file is part of Cygwin.
|
|
|
|
This software is a copyrighted work licensed under the terms of the
|
|
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
|
details. */
|
|
|
|
#include "winsup.h"
|
|
#include "security.h"
|
|
#include "cygerrno.h"
|
|
#include "path.h"
|
|
#include "fhandler.h"
|
|
|
|
fhandler_dev_zero::fhandler_dev_zero ()
|
|
: fhandler_base ()
|
|
{
|
|
}
|
|
|
|
int
|
|
fhandler_dev_zero::open (int flags, mode_t)
|
|
{
|
|
set_flags ((flags & ~O_TEXT) | O_BINARY);
|
|
nohandle (true);
|
|
set_open_status ();
|
|
return 1;
|
|
}
|
|
|
|
ssize_t __stdcall
|
|
fhandler_dev_zero::write (const void *, size_t len)
|
|
{
|
|
if (get_device () == FH_FULL)
|
|
{
|
|
set_errno (ENOSPC);
|
|
return -1;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
void __reg3
|
|
fhandler_dev_zero::read (void *ptr, size_t& len)
|
|
{
|
|
memset (ptr, 0, len);
|
|
}
|
|
|
|
off_t
|
|
fhandler_dev_zero::lseek (off_t, int)
|
|
{
|
|
return 0;
|
|
}
|