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55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <hurd.h>
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/* This is initialized in dtable.c when that gets linked in.
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If dtable.c is not linked in, it will be zero. */
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file_t (*_hurd_getdport_fn) (int fd);
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file_t
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__getdport (int fd)
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{
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if (_hurd_getdport_fn)
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/* dtable.c has defined the function to fetch a port from the real file
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descriptor table. */
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return (*_hurd_getdport_fn) (fd);
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/* getdport is the only use of file descriptors,
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so we don't bother allocating a real table. */
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if (_hurd_init_dtable == NULL)
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/* Never had a descriptor table. */
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return EBADF;
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if (fd < 0 || fd > _hurd_init_dtablesize ||
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_hurd_init_dtable[fd] == MACH_PORT_NULL)
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{
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errno = EBADF;
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return MACH_PORT_NULL;
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}
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else
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{
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__mach_port_mod_refs (__mach_task_self (), _hurd_init_dtable[fd],
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MACH_PORT_RIGHT_SEND, 1);
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return _hurd_init_dtable[fd];
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}
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}
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weak_alias (__getdport, getdport)
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