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/* Copyright (C) 1991-2021 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, see
<https://www.gnu.org/licenses/>. */
#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. */
errno = EBADF;
return MACH_PORT_NULL;
}
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)
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