e5ef74dfb2
* devices.in: Add /dev/full. * devices.cc: Regenerate. * dtable.cc (build_fh_pc): Add FH_FULL. * fhandler.cc (fhandler_base::fstat): Set FH_FULL permission bits correctly. * fhandler_zero.cc (fhandler_dev_zero::write): Set errno to ENOSPC and return -1 if device is FH_FULL.
63 lines
1.1 KiB
C++
63 lines
1.1 KiB
C++
/* fhandler_dev_zero.cc: code to access /dev/zero
|
|
|
|
Copyright 2000, 2001, 2002, 2003, 2004, 2005 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 <errno.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;
|
|
}
|
|
|
|
int
|
|
fhandler_dev_zero::write (const void *, size_t len)
|
|
{
|
|
if (get_device () == FH_FULL)
|
|
{
|
|
set_errno (ENOSPC);
|
|
return -1;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
void __stdcall
|
|
fhandler_dev_zero::read (void *ptr, size_t& len)
|
|
{
|
|
memset (ptr, 0, len);
|
|
return;
|
|
}
|
|
|
|
_off64_t
|
|
fhandler_dev_zero::lseek (_off64_t, int)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
fhandler_dev_zero::dump ()
|
|
{
|
|
paranoid_printf ("here, fhandler_dev_zero");
|
|
}
|