1 /* $NetBSD: devopen.c,v 1.3 2005/12/11 12:16:41 christos 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 { 47 int error; 48 char namebuf[128]; 49 char devtype[16]; 50 const char *cp; 51 char *ncp; 52 #if !defined(LIBSA_SINGLE_DEVICE) 53 int i; 54 struct devsw *dp; 55 #endif 56 57 cp = fname; 58 ncp = (char *)fname; 59 60 #ifdef arc 61 /* 62 * Look for "fdisk" (floppy disk?) or "rdisk" (rigid disk?) strings 63 * in OSLOADPARTITION like the following: 64 * 'scsi(0)disk(0)rdisk()partition(2)netbsd' (jazzio scsi disk) 65 * 'scsi(1)cdrom(1)fdisk()netbsd.arc' (jazzio scsi cdrom) 66 * 'multi(0)disk(0)fdisk()netbsd' (floppy disk) 67 * 'eisa(0)scsi(0)disk(0)rdisk()partition(2)netbsd' (eisa raid) 68 * etc. (the file can either be a relative path or an abosolute path). 69 */ 70 for (;;) { 71 if (strncmp(cp, "rdisk", 5) == 0 || 72 strncmp(cp, "fdisk", 5) == 0) { 73 strcpy(devtype, "disk"); 74 break; 75 } 76 while (*ncp && *ncp++ != ')') 77 ; 78 if (*ncp) 79 cp = ncp; 80 else 81 return ENXIO; 82 } 83 #endif 84 #ifdef sgimips 85 /* 86 * If device starts with a PCI bus specifier, skip past it so the 87 * device-matching code below gets the actual device type. Leave 88 * fname as is, since it'll be passed back to ARCS to open the 89 * device. This is necessary for the IP32. 90 */ 91 if (strncmp(cp, "pci", 3) == 0) { 92 while (*ncp && *ncp++ != ')') 93 ; 94 if (*ncp) 95 cp = ncp; 96 } 97 98 /* 99 * Look for a string like 'scsi(0)disk(0)rdisk(0)partition(0)netbsd' 100 * or 'dksc(0,0,0)/netbsd' (the file can either be a relative path 101 * or an abosolute path). 102 */ 103 if (strncmp(cp, "scsi", 4) == 0) { 104 strcpy(devtype, "disk"); 105 } else if (strncmp(cp, "dksc", 4) == 0) { 106 strcpy(devtype, "disk"); 107 } else 108 return ENXIO; 109 #endif 110 111 while (ncp != NULL && *ncp != 0) { 112 while (*ncp && *ncp++ != ')') 113 ; 114 if (*ncp) 115 cp = ncp; 116 } 117 118 strncpy(namebuf, fname, sizeof(namebuf)); 119 namebuf[cp - fname] = 0; 120 121 printf("devopen: %s type %s file %s\n", namebuf, devtype, cp); 122 #ifdef LIBSA_SINGLE_DEVICE 123 error = DEV_OPEN(dp)(f, fname); 124 #else /* !LIBSA_SINGLE_DEVICE */ 125 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 126 if (dp->dv_name && strcmp(devtype, dp->dv_name) == 0) 127 goto found; 128 printf("Unknown device '%s'\nKnown devices are:", devtype); 129 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 130 if (dp->dv_name) 131 printf(" %s", dp->dv_name); 132 printf("\n"); 133 return ENXIO; 134 135 found: 136 error = (dp->dv_open)(f, namebuf); 137 #endif /* !LIBSA_SINGLE_DEVICE */ 138 if (error) 139 return error; 140 141 #ifndef LIBSA_SINGLE_DEVICE 142 f->f_dev = dp; 143 #endif 144 if (file && *cp != '\0') 145 *file = (char *)cp; /* XXX */ 146 return 0; 147 } 148