1 /* $OpenBSD: devopen.c,v 1.4 2003/06/02 23:27:44 millert 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 devopen(f, fname, file) 45 struct open_file *f; 46 const char *fname; 47 char **file; /* out */ 48 { 49 register char *cp; 50 register char *ncp; 51 register struct devsw *dp; 52 register int c, i; 53 int ctlr = 0, unit = 0, part = 0; 54 char namebuf[20]; 55 int rc; 56 57 cp = (char *)fname; 58 ncp = namebuf; 59 60 #if 0 61 /* look for a string like '5/rz0/vmunix' or '5/rz3f/vmunix */ 62 if ((c = *cp) >= '0' && c <= '9') { 63 ctlr = c - '0'; 64 /* skip the '/' */ 65 if (*++cp != '/') 66 return (ENXIO); 67 cp++; 68 while ((c = *cp) != '\0') { 69 if (c == '/') 70 break; 71 if (c >= '0' && c <= '9') { 72 /* read unit number */ 73 unit = c - '0'; 74 75 /* look for a partition */ 76 if ((c = *++cp) >= 'a' && c <= 'h') { 77 part = c - 'a'; 78 c = *++cp; 79 } 80 if (c != '/') 81 return (ENXIO); 82 break; 83 } 84 if (ncp < namebuf + sizeof(namebuf) - 1) 85 *ncp++ = c; 86 cp++; 87 } 88 *ncp = '\0'; 89 } else if (strchr(cp, '(')) { 90 /* expect a string like 'rz(0,0,0)vmunix' */ 91 while ((c = *cp) != '\0') { 92 if (c == '(') { 93 cp++; 94 break; 95 } 96 if (ncp < namebuf + sizeof(namebuf) - 1) 97 *ncp++ = c; 98 cp++; 99 } 100 101 /* get controller number */ 102 if ((c = *cp) >= '0' && c <= '9') { 103 ctlr = c - '0'; 104 c = *++cp; 105 } 106 107 if (c == ',') { 108 /* get SCSI device number */ 109 if ((c = *++cp) >= '0' && c <= '9') { 110 unit = c - '0'; 111 c = *++cp; 112 } 113 114 if (c == ',') { 115 /* get partition number */ 116 if ((c = *++cp) >= '0' && c <= '9') { 117 part = c - '0'; 118 c = *++cp; 119 } 120 } 121 } 122 if (c != ')') 123 return (ENXIO); 124 cp++; 125 *ncp = '\0'; 126 } else { 127 #endif 128 dp = devsw; 129 ctlr = unit = part = 0; 130 goto fnd; 131 #if 0 132 } 133 134 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 135 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0) 136 goto fnd; 137 printf("Unknown device '%s'\nKnown devices are:", namebuf); 138 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 139 if (dp->dv_name) 140 printf(" %s", dp->dv_name); 141 printf("\n"); 142 return (ENXIO); 143 #endif 144 145 fnd: 146 rc = (dp->dv_open)(f, ctlr, unit, part); 147 if (rc) 148 return (rc); 149 150 f->f_dev = dp; 151 if (file && *cp != '\0') 152 *file = cp; 153 return (0); 154 } 155