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/* close replacement.
Copyright (C) 2008 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <unistd.h>
#if GNULIB_SYS_SOCKET
# define WIN32_LEAN_AND_MEAN
# include <sys/socket.h>
#endif
#if HAVE__GL_CLOSE_FD_MAYBE_SOCKET
/* Get set_winsock_errno, FD_TO_SOCKET etc. */
#include "w32sock.h"
static int
_gl_close_fd_maybe_socket (int fd)
{
SOCKET sock = FD_TO_SOCKET (fd);
WSANETWORKEVENTS ev;
ev.lNetworkEvents = 0xDEADBEEF;
WSAEnumNetworkEvents (sock, NULL, &ev);
if (ev.lNetworkEvents != 0xDEADBEEF)
{
/* FIXME: other applications, like squid, use an undocumented
_free_osfhnd free function. But this is not enough: The 'osfile'
flags for fd also needs to be cleared, but it is hard to access it.
Instead, here we just close twice the file descriptor. */
if (closesocket (sock))
{
set_winsock_errno ();
return -1;
}
else
{
/* This call frees the file descriptor and does a
CloseHandle ((HANDLE) _get_osfhandle (fd)), which fails. */
_close (fd);
return 0;
}
}
else
return _close (fd);
}
#endif
/* Override close() to call into other gnulib modules. */
int
rpl_close (int fd)
#undef close
{
#if HAVE__GL_CLOSE_FD_MAYBE_SOCKET
int retval = _gl_close_fd_maybe_socket (fd);
#else
int retval = close (fd);
#endif
#ifdef FCHDIR_REPLACEMENT
if (retval >= 0)
_gl_unregister_fd (fd);
#endif
return retval;
}
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