95ff6fc6da
* devices.cc: Regenerate. * dtable.h (struct dtable): Make fhandler_base friend, rather than fhandler_disk_file. * fhandler.cc (fhandler_base::open_with_arch): Create unique id. (fhandler_base::cleanup): Call del_my_locks. (fhandler_base::fcntl): Handle F_GETLK, F_SETLK and F_SETLKW. * fhandler.h (fhandler_base::get_dev): Return real device number. (fhandler_base::set_unique_id): New inline method. (fhandler_disk_file::lock): Drop declaration. (fhandler_disk_file::get_dev): New method, return pc.fs_serial_number. (fhandler_dev_zero::open): Drop declaration. * fhandler_disk_file.cc (fhandler_disk_file::close): Move del_my_locks call to fhandler_base::open_with_arch. (fhandler_disk_file::fcntl): Move handling of locking commands to fhandler_base::fcntl. (fhandler_base::open_fs): Drop call to NtAllocateLocallyUniqueId. * fhandler_zero.cc (fhandler_dev_zero::open): Remove so that default fhandler_base::open is used to open \Device\Null. * flock.cc (fixup_lockf_after_exec): Finding a single fhandler is enough here. (fhandler_base::lock): Replace fhandler_disk_file::lock. Refuse to lock nohandle devices. Handle read/write test using POSIX flags. Explain why. Never fail on SEEK_CUR or SEEK_END, rather assume position 0, just as Linux. * net.cc (fdsock): Create unique id.
46 lines
844 B
C++
46 lines
844 B
C++
/* fhandler_dev_zero.cc: code to access /dev/zero
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Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009, 2013 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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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 __reg3
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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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off_t
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fhandler_dev_zero::lseek (off_t, int)
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{
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return 0;
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}
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