1/* 2 * Copyright (c) 1999, 2008 Apple Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23/* 24 * Copyright (c) 1983, 1987, 1993 25 * The Regents of the University of California. All rights reserved. 26 * 27 * Redistribution and use in source and binary forms, with or without 28 * modification, are permitted provided that the following conditions 29 * are met: 30 * 1. Redistributions of source code must retain the above copyright 31 * notice, this list of conditions and the following disclaimer. 32 * 2. Redistributions in binary form must reproduce the above copyright 33 * notice, this list of conditions and the following disclaimer in the 34 * documentation and/or other materials provided with the distribution. 35 * 3. All advertising materials mentioning features or use of this software 36 * must display the following acknowledgement: 37 * This product includes software developed by the University of 38 * California, Berkeley and its contributors. 39 * 4. Neither the name of the University nor the names of its contributors 40 * may be used to endorse or promote products derived from this software 41 * without specific prior written permission. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 46 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 53 * SUCH DAMAGE. 54 */ 55 56 57#include <sys/param.h> 58#include <sys/time.h> 59#define DKTYPENAMES 60#include <sys/disklabel.h> 61/* from ufs/ffs/fs.h */ 62#define BBSIZE 8192 63#define SBSIZE 8192 64 65#include <errno.h> 66#include <fcntl.h> 67#include <stdio.h> 68#include <stdlib.h> 69#include <string.h> 70#include <unistd.h> 71#include <ctype.h> 72 73#ifdef unused 74static int error(int); 75#endif // unused 76static int gettype(char *, char **); 77 78struct disklabel * 79getdiskbyname(const char *name) 80{ 81 static struct disklabel *dp = NULL; 82 struct partition *pp; 83 char *buf; 84 char *db_array[2] = { _PATH_DISKTAB, 0 }; 85 char *cp, *cq; /* can't be register */ 86 char p, max, psize[3], pbsize[3], 87 pfsize[3], poffset[3], ptype[3]; 88 u_int32_t *dx; 89 90 if (cgetent(&buf, db_array, (char *) name) < 0) 91 return NULL; 92 93 if (dp == NULL) { 94 dp = malloc(sizeof(struct disklabel)); 95 if (dp == NULL) { 96 return NULL; 97 } 98 } 99 memset(dp, 0, sizeof(struct disklabel)); 100 101 /* 102 * typename 103 */ 104 cq = dp->d_typename; 105 cp = buf; 106 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && 107 (*cq = *cp) && *cq != '|' && *cq != ':') 108 cq++, cp++; 109 *cq = '\0'; 110 /* 111 * boot name (optional) xxboot, bootxx 112 */ 113 cgetstr(buf, "b0", &dp->d_boot0); 114 cgetstr(buf, "b1", &dp->d_boot1); 115 116 if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0) 117 dp->d_flags |= D_REMOVABLE; 118 else if (cq && strcmp(cq, "simulated") == 0) 119 dp->d_flags |= D_RAMDISK; 120 if (cgetcap(buf, "sf", ':') != NULL) 121 dp->d_flags |= D_BADSECT; 122 123#define getnumdflt(field, dname, dflt) \ 124 { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; } 125 126 getnumdflt(dp->d_secsize, "se", DEV_BSIZE); 127 cgetnum(buf, "nt",(long *) &dp->d_ntracks); 128 cgetnum(buf, "ns",(long *) &dp->d_nsectors); 129 cgetnum(buf, "nc",(long *) &dp->d_ncylinders); 130 131 if (cgetstr(buf, "dt", &cq) > 0) 132 dp->d_type = gettype(cq, dktypenames); 133 else 134 getnumdflt(dp->d_type, "dt", 0); 135 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); 136 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); 137 getnumdflt(dp->d_rpm, "rm", 3600); 138 getnumdflt(dp->d_interleave, "il", 1); 139 getnumdflt(dp->d_trackskew, "sk", 0); 140 getnumdflt(dp->d_cylskew, "cs", 0); 141 getnumdflt(dp->d_headswitch, "hs", 0); 142 getnumdflt(dp->d_trkseek, "ts", 0); 143 getnumdflt(dp->d_bbsize, "bs", BBSIZE); 144 getnumdflt(dp->d_sbsize, "sb", SBSIZE); 145 strcpy(psize, "px"); 146 strcpy(pbsize, "bx"); 147 strcpy(pfsize, "fx"); 148 strcpy(poffset, "ox"); 149 strcpy(ptype, "tx"); 150 max = 'a' - 1; 151 pp = &dp->d_partitions[0]; 152 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) { 153 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; 154 if (cgetnum(buf, psize,(long *) &pp->p_size) == -1) 155 pp->p_size = 0; 156 else { 157 cgetnum(buf, poffset, (long *) &pp->p_offset); 158 getnumdflt(pp->p_fsize, pfsize, 0); 159 if (pp->p_fsize) { 160 long bsize; 161 162 if (cgetnum(buf, pbsize, &bsize) == 0) 163 pp->p_frag = bsize / pp->p_fsize; 164 else 165 pp->p_frag = 8; 166 } 167 getnumdflt(pp->p_fstype, ptype, 0); 168 if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) 169 pp->p_fstype = gettype(cq, fstypenames); 170 max = p; 171 } 172 } 173 dp->d_npartitions = max + 1 - 'a'; 174 (void)strcpy(psize, "dx"); 175 dx = dp->d_drivedata; 176 for (p = '0'; p < '0' + NDDATA; p++, dx++) { 177 psize[1] = p; 178 getnumdflt(*dx, psize, 0); 179 } 180 dp->d_magic = DISKMAGIC; 181 dp->d_magic2 = DISKMAGIC; 182 free(buf); 183 return (dp); 184} 185 186static int 187gettype(t, names) 188 char *t; 189 char **names; 190{ 191 register char **nm; 192 193 for (nm = names; *nm; nm++) 194 if (strcasecmp(t, *nm) == 0) 195 return (nm - names); 196 if (isdigit(*t)) 197 return (atoi(t)); 198 return (0); 199} 200 201#ifdef unused 202static int 203error(err) 204 int err; 205{ 206 char *p; 207 208 (void)write(STDERR_FILENO, "disktab: ", 9); 209 (void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1); 210 (void)write(STDERR_FILENO, ": ", 2); 211 p = strerror(err); 212 (void)write(STDERR_FILENO, p, strlen(p)); 213 (void)write(STDERR_FILENO, "\n", 1); 214} 215#endif // unused 216