1/* $NetBSD: devopen.c,v 1.8 2023/02/12 08:25:09 tsutsui Exp $ */ 2/* 3 * Copyright (c) 1994 Rolf Grossmann 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Rolf Grossmann. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <lib/libsa/stand.h> 33#include <lib/libkern/libkern.h> 34 35int devlookup(const char *, int); 36int devparse(const char *, int *, int *, int *, int *, char **); 37 38int 39devlookup(const char *d, int len) 40{ 41 struct devsw *dp = devsw; 42 int i; 43 44 for (i = 0; i < ndevs; i++, dp++) 45 if (dp->dv_name && strncmp(dp->dv_name, d, len) == 0) 46 return i; 47 48 for (i = 0; i < len; i++) 49 printf("%c", d[i]); 50 printf(": no such device - Configured devices are:\n"); 51 for (dp = devsw, i = 0; i < ndevs; i++, dp++) 52 if (dp->dv_name && (void *)dp->dv_open != (void *)nodev) 53 printf(" %s", dp->dv_name); 54 printf("\n"); 55 errno = ENXIO; 56 return -1; 57} 58 59/* 60 * Parse a device spec. 61 * 62 * Format: 63 * dev(count, lun, part)file 64 */ 65int 66devparse(const char *fname, int *dev, 67 int *count, int *lun, int *part, char **file) 68{ 69 int i; 70 const char *s, *args[3]; 71 72 /* get device name */ 73 for (s = fname; *s && *s != '/' && *s != '('; s++) 74 ; 75 76 if (*s == '(') { 77 /* lookup device and get index */ 78 if ((*dev = devlookup(fname, s - fname)) < 0) 79 goto baddev; 80 81 /* tokenize device ident */ 82 args[0] = ++s; 83 for (i = 1; *s && *s != ')' && i<3; s++) { 84 if (*s == ',') 85 args[i++] = ++s; 86 } 87 if (*s != ')') 88 goto baddev; 89 90 switch(i) { 91 case 3: 92 *count = atoi(args[0]); 93 *lun = atoi(args[1]); 94 *part = atoi(args[2]); 95 break; 96 case 2: 97 *lun = atoi(args[0]); 98 *part = atoi(args[1]); 99 break; 100 case 1: 101 *part = atoi(args[0]); 102 break; 103 case 0: 104 break; 105 } 106 *file = (char *)++s; /* XXX discard const */ 107 } 108 /* no device present */ 109 else 110 *file = (char *)fname; /* XXX discard const */ 111 112 return 0; 113 114baddev: 115 return ENXIO; 116} 117 118int 119devopen(struct open_file *f, const char *fname, char **file) 120{ 121 int error; 122 int dev; 123 int count, lun, part; 124 struct devsw *dp; 125 126 dev = 0; /* default device is first in table (usually scsi disk) */ 127 count = 0; 128 lun = 0; 129 part = 0; 130 131 if ((error = devparse(fname, &dev, &count, &lun, &part, file)) != 0) 132 return error; 133 134 dp = &devsw[dev]; 135 136 if ((void *)dp->dv_open == (void *)nodev) 137 return ENXIO; 138 139 f->f_dev = dp; 140 141 if ((error = (*dp->dv_open)(f, count, lun, part)) != 0) 142 printf("%s(%d,%d,%d): %d = %s\n", devsw[dev].dv_name, 143 count, lun, part, error, strerror(error)); 144 145 return error; 146} 147