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Languguage OS 2
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Languguage OS II Version 10-94 (Knowledge Media)(1994).ISO
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glibc108.zip
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glibc108
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hurd
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__fopenport.c
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1994-04-20
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/* Copyright (C) 1994 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <hurd.h>
#include <stdio.h>
#include <fcntl.h>
/* Defined in fopen.c. */
extern int EXFUN(__getmode, (CONST char *mode, __io_mode *mptr));
/* Open a stream on PORT. MODE is as for fopen. */
FILE *
__fopenport (mach_port_t port, const char *mode)
{
register FILE *stream;
__io_mode m;
int pflags;
error_t err;
if (!__getmode (mode, &m))
return NULL;
/* Verify the PORT is valid allows the access MODE specifies. */
if (err = __io_get_openmodes (port, &pflags))
return __hurd_fail (err), NULL;
/* Check the access mode. */
if ((m.__read && !(pflags & O_READ)) || (m.__write && !(pflags & O_WRITE)))
{
errno = EBADF;
return NULL;
}
stream = __newstream ();
if (stream == NULL)
return NULL;
/* The default io functions in sysd-stdio.c use Hurd io ports as cookies. */
stream->__cookie = (PTR) port;
stream->__mode = m;
return stream;
}