1 /* $NetBSD: devopen.c,v 1.3 2002/11/16 08:51:27 wdk 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 #include <lib/libkern/libkern.h> 43 44 /* 45 * Decode the string 'fname', open the device and return the remaining 46 * file name if any. 47 */ 48 int 49 devopen(f, fname, file) 50 struct open_file *f; 51 const char *fname; 52 char **file; /* out */ 53 { 54 int ctlr = 0, unit = 0, part = 0; 55 int c, rc; 56 char namebuf[20]; 57 const char *cp; 58 char *ncp; 59 #if !defined(LIBSA_SINGLE_DEVICE) 60 int i; 61 struct devsw *dp; 62 #endif 63 64 cp = fname; 65 ncp = namebuf; 66 67 /* expect a string like 'dksd(0,0,0)netbsd' */ 68 while ((c = *cp) != '\0') { 69 if (c == '(') { 70 cp++; 71 break; 72 } 73 if (ncp < namebuf + sizeof(namebuf) - 1) 74 *ncp++ = c; 75 cp++; 76 } 77 78 /* get controller number */ 79 if ((c = *cp) >= '0' && c <= '9') { 80 ctlr = c - '0'; 81 c = *++cp; 82 } 83 84 if (c == ',') { 85 /* get SCSI device number */ 86 if ((c = *++cp) >= '0' && c <= '9') { 87 unit = c - '0'; 88 c = *++cp; 89 } 90 91 if (c == ',') { 92 /* get partition number */ 93 if ((c = *++cp) >= '0' && c <= '9') { 94 part = c - '0'; 95 /* dksd(,,8)boot -> dksd(,,) */ 96 if (part >= 8) 97 part = 0; 98 c = *++cp; 99 } 100 } 101 } 102 if (c != ')') 103 return (ENXIO); 104 cp++; 105 106 *ncp = '\0'; 107 108 #ifdef LIBSA_SINGLE_DEVICE 109 rc = DEV_OPEN(dp)(f, ctlr, unit, part); 110 #else /* !LIBSA_SINGLE_DEVICE */ 111 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 112 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0) 113 goto fnd; 114 printf("Unknown device '%s'\nKnown devices are:", namebuf); 115 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 116 if (dp->dv_name) 117 printf(" %s", dp->dv_name); 118 printf("\n"); 119 return (ENXIO); 120 121 fnd: 122 #ifdef BOOTNET 123 if (strcmp(namebuf, "tftp") == 0) 124 rc = (dp->dv_open)(f, namebuf); 125 else 126 #endif /* BOOTNET */ 127 rc = (dp->dv_open)(f, ctlr, unit, part); 128 #endif /* !LIBSA_SINGLE_DEVICE */ 129 if (rc) 130 return (rc); 131 132 #ifndef LIBSA_SINGLE_DEVICE 133 f->f_dev = dp; 134 #endif 135 if (file && *cp != '\0') 136 *file = (char *)cp; /* XXX */ 137 return (0); 138 } 139