1 /* $NetBSD: devopen.c,v 1.6 2009/03/14 21:04:12 dsl 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)devopen.c 8.1 (Berkeley) 6/10/93 35 */ 36 37 #include <lib/libsa/stand.h> 38 #include <lib/libkern/libkern.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(struct open_file *f, const char *fname, char **file) 46 /* file: out */ 47 { 48 int ctlr = 0, unit = 0, part = 0; 49 int c, rc; 50 char namebuf[20]; 51 const char *cp; 52 char *ncp; 53 #if !defined(LIBSA_SINGLE_DEVICE) 54 int i; 55 struct devsw *dp; 56 #endif 57 58 cp = fname; 59 ncp = namebuf; 60 61 /* expect a string like 'dksd(0,0,0)netbsd' */ 62 while ((c = *cp) != '\0') { 63 if (c == '(') { 64 cp++; 65 break; 66 } 67 if (ncp < namebuf + sizeof(namebuf) - 1) 68 *ncp++ = c; 69 cp++; 70 } 71 72 /* get controller number */ 73 if ((c = *cp) >= '0' && c <= '9') { 74 ctlr = c - '0'; 75 c = *++cp; 76 } 77 78 if (c == ',') { 79 /* get SCSI device number */ 80 if ((c = *++cp) >= '0' && c <= '9') { 81 unit = c - '0'; 82 c = *++cp; 83 } 84 85 if (c == ',') { 86 /* get partition number */ 87 if ((c = *++cp) >= '0' && c <= '9') { 88 part = c - '0'; 89 /* dksd(,,8)boot -> dksd(,,) */ 90 if (part >= 8) 91 part = 0; 92 c = *++cp; 93 } 94 } 95 } 96 if (c != ')') 97 return (ENXIO); 98 cp++; 99 100 *ncp = '\0'; 101 102 #ifdef LIBSA_SINGLE_DEVICE 103 rc = DEV_OPEN(dp)(f, ctlr, unit, part); 104 #else /* !LIBSA_SINGLE_DEVICE */ 105 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 106 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0) 107 goto fnd; 108 printf("Unknown device '%s'\nKnown devices are:", namebuf); 109 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 110 if (dp->dv_name) 111 printf(" %s", dp->dv_name); 112 printf("\n"); 113 return (ENXIO); 114 115 fnd: 116 #ifdef BOOTNET 117 if (strcmp(namebuf, "tftp") == 0) 118 rc = (dp->dv_open)(f, namebuf); 119 else 120 #endif /* BOOTNET */ 121 rc = (dp->dv_open)(f, ctlr, unit, part); 122 #endif /* !LIBSA_SINGLE_DEVICE */ 123 if (rc) 124 return (rc); 125 126 #ifndef LIBSA_SINGLE_DEVICE 127 f->f_dev = dp; 128 #endif 129 if (file && *cp != '\0') 130 *file = (char *)cp; /* XXX */ 131 return (0); 132 } 133