+++ /dev/null
-#ident "$Id: opendev.c,v 1.3 2004/11/23 23:43:02 hpa Exp $"
-/* ----------------------------------------------------------------------- *
- *
- * Copyright 2003-2004 H. Peter Anvin - All Rights Reserved
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use,
- * copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom
- * the Software is furnished to do so, subject to the following
- * conditions:
- *
- * The above copyright notice and this permission notice shall
- * be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * ----------------------------------------------------------------------- */
-
-#include <errno.h>
-#include <com32.h>
-#include <string.h>
-#include "file.h"
-
-/*
- * opendev.c
- *
- * Open a special device
- */
-
-int opendev(const struct input_dev *idev, const struct output_dev *odev, int flags)
-{
- int fd;
- struct file_info *fp;
- int okflags;
-
- okflags = (idev ? idev->fileflags : 0) | (odev ? odev->fileflags : 0);
-
- if ( !(flags & 3) || (flags & ~okflags) ) {
- errno = EINVAL;
- return -1;
- }
-
- for ( fd = 0, fp = __file_info ; fd < NFILES ; fd++, fp++ )
- if ( !fp->iop && !fp->oop )
- break;
-
- if ( fd >= NFILES ) {
- errno = EMFILE;
- return -1;
- }
-
- fp->iop = idev ? idev : &dev_error_r;
- fp->oop = odev ? odev : &dev_error_w;
- fp->i.offset = 0;
- fp->i.nbytes = 0;
- fp->i.datap = fp->i.buf;
-
- return fd;
-}