1127282Salc/* $NetBSD: devopen.c,v 1.8 2013/11/03 00:53:11 christos Exp $ */ 2127282Salc 3127282Salc/*- 4127282Salc * Copyright (c) 1992, 1993 5127282Salc * The Regents of the University of California. All rights reserved. 6127282Salc * 7127282Salc * This code is derived from software contributed to Berkeley by 8127282Salc * Ralph Campbell. 9127282Salc * 10127282Salc * Redistribution and use in source and binary forms, with or without 11127282Salc * modification, are permitted provided that the following conditions 12127282Salc * are met: 13127282Salc * 1. Redistributions of source code must retain the above copyright 14127282Salc * notice, this list of conditions and the following disclaimer. 15127282Salc * 2. Redistributions in binary form must reproduce the above copyright 16127282Salc * notice, this list of conditions and the following disclaimer in the 17127282Salc * documentation and/or other materials provided with the distribution. 18127282Salc * 3. Neither the name of the University nor the names of its contributors 19127282Salc * may be used to endorse or promote products derived from this software 20127282Salc * without specific prior written permission. 21127282Salc * 22127282Salc * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23127282Salc * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24127282Salc * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25127282Salc * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26127282Salc * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27127282Salc * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28127282Salc * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29127282Salc * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30127282Salc * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31127282Salc * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32127282Salc * SUCH DAMAGE. 33127282Salc * 34127282Salc * @(#)devopen.c 8.1 (Berkeley) 6/10/93 35127282Salc */ 36127282Salc 37127282Salc#include <lib/libsa/stand.h> 38127282Salc 39127282Salc/* 40127282Salc * Decode the string 'fname', open the device and return the remaining 41127282Salc * file name if any. 42127282Salc */ 43127282Salcint 44127282Salcdevopen(struct open_file *f, const char *fname, char **file) 45127282Salc /* file: out */ 46127282Salc{ 47127282Salc register char *cp; 48127282Salc register struct devsw *dp; 49127282Salc#if 0 50127282Salc register char *ncp; 51127282Salc register int c, i; 52127282Salc char namebuf[20]; 53127282Salc#endif 54127282Salc int ctlr = 0, unit = 0, part = 0; 55127282Salc int rc; 56127282Salc 57127282Salc cp = (char *)fname; 58127282Salc 59127282Salc#if 0 60127282Salc ncp = namebuf; 61127282Salc /* look for a string like '5/rz0/vmunix' or '5/rz3f/vmunix */ 62127282Salc if ((c = *cp) >= '0' && c <= '9') { 63127282Salc ctlr = c - '0'; 64127282Salc /* skip the '/' */ 65127282Salc if (*++cp != '/') 66127282Salc return (ENXIO); 67127282Salc cp++; 68127282Salc while ((c = *cp) != '\0') { 69127282Salc if (c == '/') 70127282Salc break; 71127282Salc if (c >= '0' && c <= '9') { 72127282Salc /* read unit number */ 73127282Salc unit = c - '0'; 74127282Salc 75127282Salc /* look for a partition */ 76127282Salc if ((c = *++cp) >= 'a' && c <= 'h') { 77127282Salc part = c - 'a'; 78127282Salc c = *++cp; 79127282Salc } 80127282Salc if (c != '/') 81127282Salc return (ENXIO); 82127282Salc break; 83127282Salc } 84127282Salc if (ncp < namebuf + sizeof(namebuf) - 1) 85127282Salc *ncp++ = c; 86127282Salc cp++; 87127282Salc } 88127282Salc *ncp = '\0'; 89127282Salc /* 90127282Salc * XXX 91127282Salc * pulling strchr from the C library, should pull from libkern. 92127282Salc */ 93127282Salc } else if (strchr(cp, '(')) { 94127282Salc /* expect a string like 'rz(0,0,0)vmunix' */ 95127282Salc while ((c = *cp) != '\0') { 96127282Salc if (c == '(') { 97127282Salc cp++; 98127282Salc break; 99127282Salc } 100127282Salc if (ncp < namebuf + sizeof(namebuf) - 1) 101127282Salc *ncp++ = c; 102127282Salc cp++; 103127282Salc } 104127282Salc 105127282Salc /* get controller number */ 106127282Salc if ((c = *cp) >= '0' && c <= '9') { 107127282Salc ctlr = c - '0'; 108127282Salc c = *++cp; 109127282Salc } 110127282Salc 111127282Salc if (c == ',') { 112127282Salc /* get SCSI device number */ 113127282Salc if ((c = *++cp) >= '0' && c <= '9') { 114127282Salc unit = c - '0'; 115127282Salc c = *++cp; 116127282Salc } 117127282Salc 118127282Salc if (c == ',') { 119127282Salc /* get partition number */ 120127282Salc if ((c = *++cp) >= '0' && c <= '9') { 121127282Salc part = c - '0'; 122127282Salc c = *++cp; 123127282Salc } 124127282Salc } 125127282Salc } 126127282Salc if (c != ')') 127127282Salc return (ENXIO); 128127282Salc cp++; 129127282Salc *ncp = '\0'; 130127282Salc } else { 131127282Salc#endif 132127282Salc dp = devsw; 133 ctlr = unit = part = 0; 134 goto fnd; 135#if 0 136 } 137 138 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 139 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0) 140 goto fnd; 141 printf("Unknown device '%s'\nKnown devices are:", namebuf); 142 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 143 if (dp->dv_name) 144 printf(" %s", dp->dv_name); 145 printf("\n"); 146 return (ENXIO); 147#endif 148 149fnd: 150 rc = (dp->dv_open)(f, ctlr, unit, part); 151 if (rc) 152 return (rc); 153 154 f->f_dev = dp; 155 if (file && *cp != '\0') 156 *file = cp; 157 return (0); 158} 159