1 /* $NetBSD: devopen.c,v 1.2 2006/04/22 07:58:53 cherry Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 Michael Smith <msmith@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 34 #include "bootstrap.h" 35 36 int 37 devopen(struct open_file *f, const char *fname, char **file) 38 { 39 struct devdesc *dev; 40 int result; 41 42 if ((result = archsw.arch_getdev((void *)&dev, fname, (const char **) file)) == 0) { /* get the device */ 43 /* point to device-specific data so that device open can use it */ 44 f->f_devdata = dev; 45 if ((result = dev->d_dev->dv_open(f, dev)) == 0) { /* try to open it */ 46 /* reference the devsw entry from the open_file structure */ 47 f->f_dev = dev->d_dev; 48 } else { 49 free(dev); /* release the device descriptor */ 50 } 51 } 52 return(result); 53 } 54 55 int 56 devclose(struct open_file *f) 57 { 58 if (f->f_devdata != NULL) { 59 free(f->f_devdata); 60 } 61 return(0); 62 } 63