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/* Copyright (C) 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 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <hurd.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
/* Read up to N chars into BUF from COOKIE.
Return how many chars were read, 0 for EOF or -1 for error. */
static ssize_t
readio (void *cookie, char *buf, size_t n)
{
mach_msg_type_number_t nread;
error_t err;
char *bufp = buf;
nread = n;
if (err = __io_read ((io_t) cookie, &bufp, &nread, -1, n))
return __hurd_fail (err);
if (bufp != buf)
{
memcpy (buf, bufp, nread);
__vm_deallocate (__mach_task_self (),
(vm_address_t) bufp, (vm_size_t) nread);
}
return nread;
}
/* Write up to N chars from BUF to COOKIE.
Return how many chars were written or -1 for error. */
static ssize_t
writeio (void *cookie, const char *buf, size_t n)
{
mach_msg_type_number_t wrote;
error_t err;
if (err = __io_write ((io_t) cookie, buf, n, -1, &wrote))
return __hurd_fail (err);
return wrote;
}
/* Move COOKIE's file position *POS bytes, according to WHENCE.
The current file position is stored in *POS.
Returns zero if successful, nonzero if not. */
static int
seekio (void *cookie, fpos_t *pos, int whence)
{
error_t error = __io_seek ((file_t) cookie, *pos, whence, pos);
if (error)
return __hurd_fail (error);
return 0;
}
/* Close the file associated with COOKIE.
Return 0 for success or -1 for failure. */
static int
closeio (void *cookie)
{
error_t error = __mach_port_deallocate (__mach_task_self (),
(mach_port_t) cookie);
if (error)
return __hurd_fail (error);
return 0;
}
static const __io_functions funcsio = { readio, writeio, seekio, closeio };
/* Defined in fopen.c. */
extern int __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;
stream->__cookie = (void *) port;
stream->__mode = m;
stream->__io_funcs = funcsio;
stream->__room_funcs = __default_room_functions;
stream->__seen = 1;
return stream;
}
weak_alias (__fopenport, fopenport)
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