1/* $NetBSD: devopen.c,v 1.16 2005/12/11 12:18:39 christos Exp $ */ 2 3/*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)devopen.c 8.1 (Berkeley) 6/10/93 35 */ 36 37#include <lib/libsa/stand.h> 38#include <lib/libkern/libkern.h> 39 40/* 41 * Decode the string 'fname', open the device and return the remaining 42 * file name if any. 43 */ 44int 45devopen(struct open_file *f, const char *fname, char **file) 46 /* file: out */ 47{ 48 int ctlr = 0, unit = 0, part = 0; 49 int c, rc; 50 char namebuf[20]; 51 const char *cp; 52 char *ncp; 53#if !defined(LIBSA_SINGLE_DEVICE) 54 int i; 55 struct devsw *dp; 56#endif 57 58 cp = fname; 59 ncp = namebuf; 60 61 /* 62 * look for a string like '5/rz0/netbsd' or '5/rz3f/netbsd 63 * or 3/tftp/netbsd 64 */ 65 if ((c = *cp) >= '0' && c <= '9') { 66 ctlr = c - '0'; 67 /* skip the '/' */ 68 if (*++cp != '/') 69 return (ENXIO); 70 cp++; 71 while ((c = *cp) != '\0') { 72 if (c == '/') 73 break; 74 if (c >= '0' && c <= '9') { 75 /* read unit number */ 76 unit = c - '0'; 77 78 /* look for a partition */ 79 if ((c = *++cp) >= 'a' && c <= 'h') { 80 part = c - 'a'; 81 c = *++cp; 82 } 83 if (c != '/') 84 return (ENXIO); 85 cp++; 86 break; 87 } 88 if (ncp < namebuf + sizeof(namebuf) - 1) 89 *ncp++ = c; 90 cp++; 91 } 92 } else { 93 /* expect a string like 'rz(0,0,0)netbsd' */ 94 while ((c = *cp) != '\0') { 95 if (c == '(') { 96 cp++; 97 break; 98 } 99 if (ncp < namebuf + sizeof(namebuf) - 1) 100 *ncp++ = c; 101 cp++; 102 } 103 104 /* get controller number */ 105 if ((c = *cp) >= '0' && c <= '9') { 106 ctlr = c - '0'; 107 c = *++cp; 108 } 109 110 if (c == ',') { 111 /* get SCSI device number */ 112 if ((c = *++cp) >= '0' && c <= '9') { 113 unit = c - '0'; 114 c = *++cp; 115 } 116 117 if (c == ',') { 118 /* get partition number */ 119 if ((c = *++cp) >= '0' && c <= '9') { 120 part = c - '0'; 121 c = *++cp; 122 } 123 } 124 } 125 if (c != ')') 126 return (ENXIO); 127 cp++; 128 } 129 *ncp = '\0'; 130 131#ifdef LIBSA_SINGLE_DEVICE 132 rc = DEV_OPEN(dp)(f, ctlr, unit, part); 133#else /* !LIBSA_SINGLE_DEVICE */ 134 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 135 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0) 136 goto fnd; 137 printf("Unknown device '%s'\nKnown devices are:", namebuf); 138 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 139 if (dp->dv_name) 140 printf(" %s", dp->dv_name); 141 printf("\n"); 142 return (ENXIO); 143 144fnd: 145#ifdef BOOTNET 146 if (strcmp(namebuf, "tftp") == 0) 147 rc = (dp->dv_open)(f, namebuf); 148 else 149#endif /* BOOTNET */ 150 rc = (dp->dv_open)(f, ctlr, unit, part); 151#endif /* !LIBSA_SINGLE_DEVICE */ 152 if (rc) 153 return (rc); 154 155#ifndef LIBSA_SINGLE_DEVICE 156 f->f_dev = dp; 157#endif 158 if (file && *cp != '\0') 159 *file = (char *)cp; /* XXX */ 160 return (0); 161} 162