devopen.c revision 1.3.6.2
1 1.3.6.2 cgd /* $NetBSD: devopen.c,v 1.3.6.2 1997/04/06 08:41:26 cgd Exp $ */ 2 1.3.6.2 cgd 3 1.3.6.2 cgd /*- 4 1.3.6.2 cgd * Copyright (c) 1992, 1993 5 1.3.6.2 cgd * The Regents of the University of California. All rights reserved. 6 1.3.6.2 cgd * 7 1.3.6.2 cgd * This code is derived from software contributed to Berkeley by 8 1.3.6.2 cgd * Ralph Campbell. 9 1.3.6.2 cgd * 10 1.3.6.2 cgd * Redistribution and use in source and binary forms, with or without 11 1.3.6.2 cgd * modification, are permitted provided that the following conditions 12 1.3.6.2 cgd * are met: 13 1.3.6.2 cgd * 1. Redistributions of source code must retain the above copyright 14 1.3.6.2 cgd * notice, this list of conditions and the following disclaimer. 15 1.3.6.2 cgd * 2. Redistributions in binary form must reproduce the above copyright 16 1.3.6.2 cgd * notice, this list of conditions and the following disclaimer in the 17 1.3.6.2 cgd * documentation and/or other materials provided with the distribution. 18 1.3.6.2 cgd * 3. All advertising materials mentioning features or use of this software 19 1.3.6.2 cgd * must display the following acknowledgement: 20 1.3.6.2 cgd * This product includes software developed by the University of 21 1.3.6.2 cgd * California, Berkeley and its contributors. 22 1.3.6.2 cgd * 4. Neither the name of the University nor the names of its contributors 23 1.3.6.2 cgd * may be used to endorse or promote products derived from this software 24 1.3.6.2 cgd * without specific prior written permission. 25 1.3.6.2 cgd * 26 1.3.6.2 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 1.3.6.2 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 1.3.6.2 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 1.3.6.2 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 1.3.6.2 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 1.3.6.2 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 1.3.6.2 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 1.3.6.2 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 1.3.6.2 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 1.3.6.2 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 1.3.6.2 cgd * SUCH DAMAGE. 37 1.3.6.2 cgd * 38 1.3.6.2 cgd * @(#)devopen.c 8.1 (Berkeley) 6/10/93 39 1.3.6.2 cgd */ 40 1.3.6.2 cgd 41 1.3.6.2 cgd #include <lib/libsa/stand.h> 42 1.3.6.2 cgd 43 1.3.6.2 cgd /* 44 1.3.6.2 cgd * Decode the string 'fname', open the device and return the remaining 45 1.3.6.2 cgd * file name if any. 46 1.3.6.2 cgd */ 47 1.3.6.2 cgd devopen(f, fname, file) 48 1.3.6.2 cgd struct open_file *f; 49 1.3.6.2 cgd const char *fname; 50 1.3.6.2 cgd char **file; /* out */ 51 1.3.6.2 cgd { 52 1.3.6.2 cgd register char *cp; 53 1.3.6.2 cgd register char *ncp; 54 1.3.6.2 cgd register struct devsw *dp; 55 1.3.6.2 cgd register int c, i; 56 1.3.6.2 cgd int ctlr = 0, unit = 0, part = 0; 57 1.3.6.2 cgd char namebuf[20]; 58 1.3.6.2 cgd int rc; 59 1.3.6.2 cgd 60 1.3.6.2 cgd cp = (char *)fname; 61 1.3.6.2 cgd ncp = namebuf; 62 1.3.6.2 cgd 63 1.3.6.2 cgd #if 0 64 1.3.6.2 cgd /* look for a string like '5/rz0/vmunix' or '5/rz3f/vmunix */ 65 1.3.6.2 cgd if ((c = *cp) >= '0' && c <= '9') { 66 1.3.6.2 cgd ctlr = c - '0'; 67 1.3.6.2 cgd /* skip the '/' */ 68 1.3.6.2 cgd if (*++cp != '/') 69 1.3.6.2 cgd return (ENXIO); 70 1.3.6.2 cgd cp++; 71 1.3.6.2 cgd while ((c = *cp) != '\0') { 72 1.3.6.2 cgd if (c == '/') 73 1.3.6.2 cgd break; 74 1.3.6.2 cgd if (c >= '0' && c <= '9') { 75 1.3.6.2 cgd /* read unit number */ 76 1.3.6.2 cgd unit = c - '0'; 77 1.3.6.2 cgd 78 1.3.6.2 cgd /* look for a partition */ 79 1.3.6.2 cgd if ((c = *++cp) >= 'a' && c <= 'h') { 80 1.3.6.2 cgd part = c - 'a'; 81 1.3.6.2 cgd c = *++cp; 82 1.3.6.2 cgd } 83 1.3.6.2 cgd if (c != '/') 84 1.3.6.2 cgd return (ENXIO); 85 1.3.6.2 cgd break; 86 1.3.6.2 cgd } 87 1.3.6.2 cgd if (ncp < namebuf + sizeof(namebuf) - 1) 88 1.3.6.2 cgd *ncp++ = c; 89 1.3.6.2 cgd cp++; 90 1.3.6.2 cgd } 91 1.3.6.2 cgd *ncp = '\0'; 92 1.3.6.2 cgd /* 93 1.3.6.2 cgd * XXX 94 1.3.6.2 cgd * pulling strchr from the C library, should pull from libkern. 95 1.3.6.2 cgd */ 96 1.3.6.2 cgd } else if (strchr(cp, '(')) { 97 1.3.6.2 cgd /* expect a string like 'rz(0,0,0)vmunix' */ 98 1.3.6.2 cgd while ((c = *cp) != '\0') { 99 1.3.6.2 cgd if (c == '(') { 100 1.3.6.2 cgd cp++; 101 1.3.6.2 cgd break; 102 1.3.6.2 cgd } 103 1.3.6.2 cgd if (ncp < namebuf + sizeof(namebuf) - 1) 104 1.3.6.2 cgd *ncp++ = c; 105 1.3.6.2 cgd cp++; 106 1.3.6.2 cgd } 107 1.3.6.2 cgd 108 1.3.6.2 cgd /* get controller number */ 109 1.3.6.2 cgd if ((c = *cp) >= '0' && c <= '9') { 110 1.3.6.2 cgd ctlr = c - '0'; 111 1.3.6.2 cgd c = *++cp; 112 1.3.6.2 cgd } 113 1.3.6.2 cgd 114 1.3.6.2 cgd if (c == ',') { 115 1.3.6.2 cgd /* get SCSI device number */ 116 1.3.6.2 cgd if ((c = *++cp) >= '0' && c <= '9') { 117 1.3.6.2 cgd unit = c - '0'; 118 1.3.6.2 cgd c = *++cp; 119 1.3.6.2 cgd } 120 1.3.6.2 cgd 121 1.3.6.2 cgd if (c == ',') { 122 1.3.6.2 cgd /* get partition number */ 123 1.3.6.2 cgd if ((c = *++cp) >= '0' && c <= '9') { 124 1.3.6.2 cgd part = c - '0'; 125 1.3.6.2 cgd c = *++cp; 126 1.3.6.2 cgd } 127 1.3.6.2 cgd } 128 1.3.6.2 cgd } 129 1.3.6.2 cgd if (c != ')') 130 1.3.6.2 cgd return (ENXIO); 131 1.3.6.2 cgd cp++; 132 1.3.6.2 cgd *ncp = '\0'; 133 1.3.6.2 cgd } else { 134 1.3.6.2 cgd #endif 135 1.3.6.2 cgd dp = devsw; 136 1.3.6.2 cgd ctlr = unit = part = 0; 137 1.3.6.2 cgd goto fnd; 138 1.3.6.2 cgd #if 0 139 1.3.6.2 cgd } 140 1.3.6.2 cgd 141 1.3.6.2 cgd for (dp = devsw, i = 0; i < ndevs; dp++, i++) 142 1.3.6.2 cgd if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0) 143 1.3.6.2 cgd goto fnd; 144 1.3.6.2 cgd printf("Unknown device '%s'\nKnown devices are:", namebuf); 145 1.3.6.2 cgd for (dp = devsw, i = 0; i < ndevs; dp++, i++) 146 1.3.6.2 cgd if (dp->dv_name) 147 1.3.6.2 cgd printf(" %s", dp->dv_name); 148 1.3.6.2 cgd printf("\n"); 149 1.3.6.2 cgd return (ENXIO); 150 1.3.6.2 cgd #endif 151 1.3.6.2 cgd 152 1.3.6.2 cgd fnd: 153 1.3.6.2 cgd rc = (dp->dv_open)(f, ctlr, unit, part); 154 1.3.6.2 cgd if (rc) 155 1.3.6.2 cgd return (rc); 156 1.3.6.2 cgd 157 1.3.6.2 cgd f->f_dev = dp; 158 1.3.6.2 cgd if (file && *cp != '\0') 159 1.3.6.2 cgd *file = cp; 160 1.3.6.2 cgd return (0); 161 1.3.6.2 cgd } 162
Indexes created Thu Oct 02 14:10:14 GMT 2025