1 /* $NetBSD: devopen.c,v 1.1 2002/11/09 06:20:41 cgd 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)devopen.c 8.1 (Berkeley) 6/10/93 39 */ 40 41 #include <lib/libsa/stand.h> 42 43 /* 44 * Decode the string 'fname', open the device and return the remaining 45 * file name if any. 46 */ 47 int 48 devopen(f, fname, file) 49 struct open_file *f; 50 const char *fname; 51 char **file; /* out */ 52 { 53 register char *cp; 54 register char *ncp; 55 register struct devsw *dp; 56 #if 0 57 register int c, i; 58 #endif 59 int ctlr = 0, unit = 0, part = 0; 60 char namebuf[20]; 61 int rc; 62 63 cp = (char *)fname; 64 ncp = namebuf; 65 66 #if 0 67 /* look for a string like '5/rz0/vmunix' or '5/rz3f/vmunix */ 68 if ((c = *cp) >= '0' && c <= '9') { 69 ctlr = c - '0'; 70 /* skip the '/' */ 71 if (*++cp != '/') 72 return (ENXIO); 73 cp++; 74 while ((c = *cp) != '\0') { 75 if (c == '/') 76 break; 77 if (c >= '0' && c <= '9') { 78 /* read unit number */ 79 unit = c - '0'; 80 81 /* look for a partition */ 82 if ((c = *++cp) >= 'a' && c <= 'h') { 83 part = c - 'a'; 84 c = *++cp; 85 } 86 if (c != '/') 87 return (ENXIO); 88 break; 89 } 90 if (ncp < namebuf + sizeof(namebuf) - 1) 91 *ncp++ = c; 92 cp++; 93 } 94 *ncp = '\0'; 95 /* 96 * XXX 97 * pulling strchr from the C library, should pull from libkern. 98 */ 99 } else if (strchr(cp, '(')) { 100 /* expect a string like 'rz(0,0,0)vmunix' */ 101 while ((c = *cp) != '\0') { 102 if (c == '(') { 103 cp++; 104 break; 105 } 106 if (ncp < namebuf + sizeof(namebuf) - 1) 107 *ncp++ = c; 108 cp++; 109 } 110 111 /* get controller number */ 112 if ((c = *cp) >= '0' && c <= '9') { 113 ctlr = c - '0'; 114 c = *++cp; 115 } 116 117 if (c == ',') { 118 /* get SCSI device number */ 119 if ((c = *++cp) >= '0' && c <= '9') { 120 unit = c - '0'; 121 c = *++cp; 122 } 123 124 if (c == ',') { 125 /* get partition number */ 126 if ((c = *++cp) >= '0' && c <= '9') { 127 part = c - '0'; 128 c = *++cp; 129 } 130 } 131 } 132 if (c != ')') 133 return (ENXIO); 134 cp++; 135 *ncp = '\0'; 136 } else { 137 #endif 138 dp = devsw; 139 ctlr = unit = part = 0; 140 goto fnd; 141 #if 0 142 } 143 144 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 145 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0) 146 goto fnd; 147 printf("Unknown device '%s'\nKnown devices are:", namebuf); 148 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 149 if (dp->dv_name) 150 printf(" %s", dp->dv_name); 151 printf("\n"); 152 return (ENXIO); 153 #endif 154 155 fnd: 156 rc = (dp->dv_open)(f, ctlr, unit, part); 157 if (rc) 158 return (rc); 159 160 f->f_dev = dp; 161 if (file && *cp != '\0') 162 *file = cp; 163 return (0); 164 } 165