1 /* $NetBSD: devopen.c,v 1.4 2003/08/07 16:28:38 agc 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(f, fname, file) 46 struct open_file *f; 47 const char *fname; 48 char **file; /* out */ 49 { 50 int ctlr = 0, unit = 0, part = 0; 51 int c, rc; 52 char namebuf[20]; 53 const char *cp; 54 char *ncp; 55 #if !defined(LIBSA_SINGLE_DEVICE) 56 int i; 57 struct devsw *dp; 58 #endif 59 60 cp = fname; 61 ncp = namebuf; 62 63 /* expect a string like 'dksd(0,0,0)netbsd' */ 64 while ((c = *cp) != '\0') { 65 if (c == '(') { 66 cp++; 67 break; 68 } 69 if (ncp < namebuf + sizeof(namebuf) - 1) 70 *ncp++ = c; 71 cp++; 72 } 73 74 /* get controller number */ 75 if ((c = *cp) >= '0' && c <= '9') { 76 ctlr = c - '0'; 77 c = *++cp; 78 } 79 80 if (c == ',') { 81 /* get SCSI device number */ 82 if ((c = *++cp) >= '0' && c <= '9') { 83 unit = c - '0'; 84 c = *++cp; 85 } 86 87 if (c == ',') { 88 /* get partition number */ 89 if ((c = *++cp) >= '0' && c <= '9') { 90 part = c - '0'; 91 /* dksd(,,8)boot -> dksd(,,) */ 92 if (part >= 8) 93 part = 0; 94 c = *++cp; 95 } 96 } 97 } 98 if (c != ')') 99 return (ENXIO); 100 cp++; 101 102 *ncp = '\0'; 103 104 #ifdef LIBSA_SINGLE_DEVICE 105 rc = DEV_OPEN(dp)(f, ctlr, unit, part); 106 #else /* !LIBSA_SINGLE_DEVICE */ 107 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 108 if (dp->dv_name && strcmp(namebuf, dp->dv_name) == 0) 109 goto fnd; 110 printf("Unknown device '%s'\nKnown devices are:", namebuf); 111 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 112 if (dp->dv_name) 113 printf(" %s", dp->dv_name); 114 printf("\n"); 115 return (ENXIO); 116 117 fnd: 118 #ifdef BOOTNET 119 if (strcmp(namebuf, "tftp") == 0) 120 rc = (dp->dv_open)(f, namebuf); 121 else 122 #endif /* BOOTNET */ 123 rc = (dp->dv_open)(f, ctlr, unit, part); 124 #endif /* !LIBSA_SINGLE_DEVICE */ 125 if (rc) 126 return (rc); 127 128 #ifndef LIBSA_SINGLE_DEVICE 129 f->f_dev = dp; 130 #endif 131 if (file && *cp != '\0') 132 *file = (char *)cp; /* XXX */ 133 return (0); 134 } 135