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83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/* close replacement.
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Copyright (C) 2008 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <unistd.h>
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#if GNULIB_SYS_SOCKET
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# define WIN32_LEAN_AND_MEAN
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# include <sys/socket.h>
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#endif
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#if HAVE__GL_CLOSE_FD_MAYBE_SOCKET
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/* Get set_winsock_errno, FD_TO_SOCKET etc. */
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#include "w32sock.h"
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static int
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_gl_close_fd_maybe_socket (int fd)
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{
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SOCKET sock = FD_TO_SOCKET (fd);
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WSANETWORKEVENTS ev;
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ev.lNetworkEvents = 0xDEADBEEF;
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WSAEnumNetworkEvents (sock, NULL, &ev);
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if (ev.lNetworkEvents != 0xDEADBEEF)
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{
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/* FIXME: other applications, like squid, use an undocumented
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_free_osfhnd free function. But this is not enough: The 'osfile'
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flags for fd also needs to be cleared, but it is hard to access it.
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Instead, here we just close twice the file descriptor. */
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if (closesocket (sock))
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{
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set_winsock_errno ();
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return -1;
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}
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else
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{
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/* This call frees the file descriptor and does a
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CloseHandle ((HANDLE) _get_osfhandle (fd)), which fails. */
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_close (fd);
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return 0;
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}
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}
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else
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return _close (fd);
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}
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#endif
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/* Override close() to call into other gnulib modules. */
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int
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rpl_close (int fd)
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#undef close
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{
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#if HAVE__GL_CLOSE_FD_MAYBE_SOCKET
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int retval = _gl_close_fd_maybe_socket (fd);
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#else
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int retval = close (fd);
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#endif
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#ifdef FCHDIR_REPLACEMENT
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if (retval >= 0)
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_gl_unregister_fd (fd);
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#endif
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return retval;
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}
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