55 lines
997 B
C++
55 lines
997 B
C++
/* fhandler_dev_zero.cc: code to access /dev/zero
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Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009 Red Hat, Inc.
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Written by DJ Delorie (dj@cygnus.com)
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include "security.h"
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#include "cygerrno.h"
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#include "path.h"
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#include "fhandler.h"
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fhandler_dev_zero::fhandler_dev_zero ()
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: fhandler_base ()
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{
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}
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int
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fhandler_dev_zero::open (int flags, mode_t)
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{
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set_flags ((flags & ~O_TEXT) | O_BINARY);
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nohandle (true);
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set_open_status ();
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return 1;
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}
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ssize_t __stdcall
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fhandler_dev_zero::write (const void *, size_t len)
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{
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if (get_device () == FH_FULL)
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{
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set_errno (ENOSPC);
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return -1;
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}
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return len;
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}
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void __stdcall
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fhandler_dev_zero::read (void *ptr, size_t& len)
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{
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memset (ptr, 0, len);
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}
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_off64_t
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fhandler_dev_zero::lseek (_off64_t, int)
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{
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return 0;
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}
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