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      1 /*	$NetBSD: devopen.c,v 1.3 2009/07/20 04:59:03 kiyohara Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 Michael Smith <msmith (at) freebsd.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 /* __FBSDID("$FreeBSD: src/sys/boot/common/devopen.c,v 1.4 2003/08/25 23:30:41 obrien Exp $"); */
     31 
     32 #include <lib/libsa/stand.h>
     33 #include <lib/libsa/loadfile.h>
     34 
     35 #include "bootstrap.h"
     36 
     37 int
     38 devopen(struct open_file *f, const char *fname, char **file)
     39 {
     40     struct devdesc	*dev;
     41     int			result;
     42 
     43     if ((result = archsw.arch_getdev((void *)&dev, fname, (const char **) file)) == 0) {	/* get the device */
     44 	/* point to device-specific data so that device open can use it */
     45 	f->f_devdata = dev;
     46 	if ((result = dev->d_dev->dv_open(f, dev)) == 0) { 		/* try to open it */
     47 	    /* reference the devsw entry from the open_file structure */
     48 	    f->f_dev = dev->d_dev;
     49 	} else {
     50 	    free(dev);		/* release the device descriptor */
     51 	}
     52     }
     53     return(result);
     54 }
     55 
     56 int
     57 devclose(struct open_file *f)
     58 {
     59     if (f->f_devdata != NULL) {
     60 	free(f->f_devdata);
     61     }
     62     return(0);
     63 }
     64