1 /* $NetBSD: devopen.c,v 1.6 2005/12/11 12:18:58 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 #if 0 48 int ctlr = 0, unit = 0, part = 0; 49 #endif 50 int error; 51 char namebuf[128]; 52 char devtype[16]; 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 = (char *)fname; 62 63 /* 64 * If device starts with a PCI bus specifier, skip past it so the 65 * device-matching code below gets the actual device type. Leave 66 * fname as is, since it'll be passed back to ARCS to open the 67 * device. This is necessary for the IP32. 68 */ 69 if (strncmp(cp, "pci", 3) == 0) { 70 while (*ncp && *ncp++ != ')') 71 ; 72 if (*ncp) 73 cp = ncp; 74 } 75 76 /* 77 * Look for a string like 'scsi(0)disk(0)rdisk(0)partition(0)netbsd' 78 * or 'dksc(0,0,0)/netbsd' (the file can either be a relative path 79 * or an abosolute path). 80 */ 81 if (strncmp(cp, "scsi", 4) == 0) { 82 strcpy(devtype, "scsi"); 83 } else if (strncmp(cp, "dksc", 4) == 0) { 84 strcpy(devtype, "dksc"); 85 } else { 86 return ENXIO; 87 } 88 89 while (ncp != NULL && *ncp != 0) { 90 while (*ncp && *ncp++ != ')') 91 ; 92 if (*ncp) 93 cp = ncp; 94 } 95 96 strncpy(namebuf, fname, sizeof(namebuf)); 97 namebuf[cp - fname] = 0; 98 99 printf("devopen: %s type %s file %s\n", namebuf, devtype, cp); 100 #ifdef LIBSA_SINGLE_DEVICE 101 error = DEV_OPEN(dp)(f, fname); 102 #else /* !LIBSA_SINGLE_DEVICE */ 103 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 104 if (dp->dv_name && strcmp(devtype, dp->dv_name) == 0) 105 goto found; 106 printf("Unknown device '%s'\nKnown devices are:", devtype); 107 for (dp = devsw, i = 0; i < ndevs; dp++, i++) 108 if (dp->dv_name) 109 printf(" %s", dp->dv_name); 110 printf("\n"); 111 return ENXIO; 112 113 found: 114 error = (dp->dv_open)(f, namebuf); 115 #endif /* !LIBSA_SINGLE_DEVICE */ 116 if (error) 117 return error; 118 119 #ifndef LIBSA_SINGLE_DEVICE 120 f->f_dev = dp; 121 #endif 122 if (file && *cp != '\0') 123 *file = (char *)cp; /* XXX */ 124 return 0; 125 } 126