static int
close_fd_maybe_socket (int fd, const struct close_hook *remaining_list)
{
SOCKET sock;
WSANETWORKEVENTS ev;
/* Test whether fd refers to a socket. */
sock = FD_TO_SOCKET (fd);
ev.lNetworkEvents = 0xDEADBEEF;
WSAEnumNetworkEvents (sock, NULL, &ev);
if (ev.lNetworkEvents != 0xDEADBEEF)
{
/* fd refers to a socket. */
/* 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
/* Some other type of file descriptor. */
return execute_close_hooks (fd, remaining_list);
}
static int
close_fd_maybe_socket (const struct fd_hook *remaining_list,
gl_close_fn primary,
int fd)
{
/* Note about multithread-safety: There is a race condition where, between
our calls to closesocket() and the primary close(), some other thread
could make system calls that allocate precisely the same HANDLE value
as sock; then the primary close() would call CloseHandle() on it. */
SOCKET sock;
WSANETWORKEVENTS ev;
/* Test whether fd refers to a socket. */
sock = FD_TO_SOCKET (fd);
ev.lNetworkEvents = 0xDEADBEEF;
WSAEnumNetworkEvents (sock, NULL, &ev);
if (ev.lNetworkEvents != 0xDEADBEEF)
{
/* fd refers to a socket. */
/* 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
/* Some other type of file descriptor. */
return execute_close_hooks (remaining_list, primary, fd);
}
int
execute_all_close_hooks (int fd)
{
return execute_close_hooks (fd, anchor.private_next);
}
int
execute_all_close_hooks (gl_close_fn primary, int fd)
{
return execute_close_hooks (anchor.private_next, primary, fd);
}