devopen.c revision 1.3
1 /* $NetBSD: devopen.c,v 1.3 2013/01/16 15:46:20 tsutsui Exp $ */ 2 3 /* 4 * Copyright (c) 1992 OMRON Corporation. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * OMRON Corporation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)conf.c 8.1 (Berkeley) 6/10/93 38 */ 39 /* 40 * Copyright (c) 1992, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * OMRON Corporation. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)conf.c 8.1 (Berkeley) 6/10/93 71 */ 72 73 #include <lib/libkern/libkern.h> 74 #include <luna68k/stand/boot/samachdep.h> 75 #include <machine/disklabel.h> 76 77 static int make_device(const char *, int *, int *, int *, char **); 78 79 int 80 devopen(struct open_file *f, const char *fname, char **file) 81 { 82 int dev, unit, part; 83 int error; 84 struct devsw *dp; 85 int i; 86 87 if (make_device(fname, &dev, &unit, &part, file) != 0) 88 return ENXIO; 89 90 #ifdef DEBUG 91 printf("%s: %s(%d,%d)%s\n", __func__, 92 devsw[dev].dv_name, unit, part, *file); 93 #endif 94 dp = &devsw[dev]; 95 error = (*dp->dv_open)(f, unit, part); 96 if (error != 0) { 97 #ifdef DEBUG 98 printf("%s: open %s(%d,%d)%s failed (%s)\n", __func__, 99 devsw[dev].dv_name, unit, part, *file, strerror(error)); 100 #endif 101 return error; 102 } 103 104 for (i = 0; i < nfsys_disk; i++) 105 file_system[i] = file_system_disk[i]; 106 nfsys = nfsys_disk; 107 108 #ifdef SUPPORT_ETHERNET 109 if (strcmp(dp->dv_name, "le") == 0) { 110 /* XXX mixing local fs_ops on netboot could be troublesome */ 111 file_system[0] = file_system_nfs[0]; 112 nfsys = 1; 113 } 114 #endif 115 116 f->f_dev = dp; 117 118 return 0; 119 } 120 121 int 122 make_device(const char *str, int *devp, int *unitp, int *partp, char **fname) 123 { 124 const char *cp; 125 struct devsw *dp; 126 int major, unit, part; 127 int i; 128 char devname[MAXDEVNAME + 1]; 129 130 /* 131 * parse path strings 132 */ 133 /* find end of dev type name */ 134 for (cp = str, i = 0; *cp != '\0' && *cp != '(' && i < MAXDEVNAME; i++) 135 devname[i] = *cp++; 136 if (*cp != '(') { 137 return (-1); 138 } 139 devname[i] = '\0'; 140 /* compare dev type name */ 141 for (dp = devsw; dp->dv_name; dp++) 142 if (!strcmp(devname, dp->dv_name)) 143 break; 144 cp++; 145 if (dp->dv_name == NULL) { 146 return (-1); 147 } 148 major = dp - devsw; 149 /* get unit number */ 150 unit = *cp++ - '0'; 151 if (*cp >= '0' && *cp <= '9') 152 unit = unit * 10 + *cp++ - '0'; 153 if (unit < 0 || unit > 63) { 154 #ifdef DEBUG 155 printf("%s: invalid unit number (%d)\n", __func__, unit); 156 #endif 157 return (-1); 158 } 159 /* get partition offset */ 160 if (*cp++ != ',') { 161 return (-1); 162 } 163 part = *cp - '0'; 164 /* check out end of dev spec */ 165 for (;;) { 166 if (*cp == ')') 167 break; 168 if (*cp++) 169 continue; 170 return (-1); 171 } 172 if (part < 0 || part > MAXPARTITIONS) { 173 #ifdef DEBUG 174 printf("%s: invalid partition number (%d)\n", __func__, part); 175 #endif 176 return (-1); 177 } 178 179 *devp = major; 180 *unitp = unit; 181 *partp = part; 182 *fname = __UNCONST(cp + 1); 183 #ifdef DEBUG 184 printf("%s: major = %d, unit = %d, part = %d, fname = %s\n", 185 __func__, major, unit, part, *fname); 186 #endif 187 188 return 0; 189 } 190
Indexes created Wed Sep 24 15:09:51 GMT 2025