diff options
Diffstat (limited to 'gnulib/lib/close.c')
-rw-r--r-- | gnulib/lib/close.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/gnulib/lib/close.c b/gnulib/lib/close.c new file mode 100644 index 000000000..14243e47f --- /dev/null +++ b/gnulib/lib/close.c @@ -0,0 +1,82 @@ +/* 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 Lesser General Public License as published by + the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser 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; +} |