/* Copyright (C) 1991, 1992, 1994, 1995, 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library 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. The GNU C Library 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 the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <hurd.h> /* This is initialized in dtable.c when that gets linked in. If dtable.c is not linked in, it will be zero. */ static file_t (*_default_hurd_getdport_fn) (int fd) = 0; weak_alias (_default_hurd_getdport_fn, _hurd_getdport_fn) file_t __getdport (int fd) { if (_hurd_getdport_fn) /* dtable.c has defined the function to fetch a port from the real file descriptor table. */ return (*_hurd_getdport_fn) (fd); /* getdport is the only use of file descriptors, so we don't bother allocating a real table. */ if (_hurd_init_dtable == NULL) /* Never had a descriptor table. */ return EBADF; if (fd < 0 || (unsigned int) fd > _hurd_init_dtablesize || _hurd_init_dtable[fd] == MACH_PORT_NULL) { errno = EBADF; return MACH_PORT_NULL; } else { __mach_port_mod_refs (__mach_task_self (), _hurd_init_dtable[fd], MACH_PORT_RIGHT_SEND, 1); return _hurd_init_dtable[fd]; } } weak_alias (__getdport, getdport)