1 /* $OpenBSD: devopen.c,v 1.5 2011/06/05 21:49:36 miod Exp $ */ 2 /* $NetBSD: devopen.c,v 1.3 1997/04/06 08:41:25 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Ralph Campbell. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)devopen.c 8.1 (Berkeley) 6/10/93 36 */ 37 38 #include <lib/libsa/stand.h> 39 40 /* 41 * Decode the string 'fname', open the device and return the remaining 42 * file name if any. 43 */ 44 int 45 devopen(f, fname, file) 46 struct open_file *f; 47 const char *fname; 48 char **file; /* out */ 49 { 50 register char *cp; 51 register char *ncp; 52 register struct devsw *dp; 53 #if 0 54 register int c, i; 55 #endif 56 int ctlr = 0, unit = 0, part = 0; 57 char namebuf[20]; 58 int rc; 59 60 cp = (char *)fname; 61 ncp = namebuf; 62 63 #if 0 64 /* look for a string like '5/rz0/vmunix' or '5/rz3f/vmunix */ 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 break; 86 } 87 if (ncp < namebuf + sizeof(namebuf) - 1) 88 *ncp++ = c; 89 cp++; 90 } 91 *ncp = '\0'; 92 } else if (strchr(cp, '(')) { 93 /* expect a string like 'rz(0,0,0)vmunix' */ 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 *ncp = '\0'; 129 } else { 130 #endif 131 dp = devsw; 132 ctlr = unit = part = 0; 133 goto fnd; 134 #if 0 135 } 136 137 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 138 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0) 139 goto fnd; 140 printf("Unknown device '%s'\nKnown devices are:", namebuf); 141 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 142 if (dp->dv_name) 143 printf(" %s", dp->dv_name); 144 printf("\n"); 145 return (ENXIO); 146 #endif 147 148 fnd: 149 rc = (dp->dv_open)(f, ctlr, unit, part); 150 if (rc) 151 return (rc); 152 153 f->f_dev = dp; 154 if (file && *cp != '\0') 155 *file = cp; 156 return (0); 157 } 158