1 /* $NetBSD: disklabel.c,v 1.37 2012/06/25 22:32:43 abs Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1987, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if HAVE_NBTOOL_CONFIG_H 33 #include "nbtool_config.h" 34 #endif 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 5/3/95"; 40 #else 41 __RCSID("$NetBSD: disklabel.c,v 1.37 2012/06/25 22:32:43 abs Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "namespace.h" 46 #include <sys/param.h> 47 #define DKTYPENAMES 48 #define FSTYPENAMES 49 #include <ufs/ufs/dinode.h> 50 #include <ufs/ffs/fs.h> 51 52 #if HAVE_NBTOOL_CONFIG_H 53 #include <nbinclude/sys/disklabel.h> 54 #include <nbinclude/disktab.h> 55 #else 56 #include <sys/disklabel.h> 57 #include <disktab.h> 58 #endif /* HAVE_NBTOOL_CONFIG_H */ 59 60 #include <assert.h> 61 #include <ctype.h> 62 #include <errno.h> 63 #include <fcntl.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 69 #ifdef __weak_alias 70 __weak_alias(getdiskbyname,_getdiskbyname) 71 #endif 72 73 #if 0 74 static void error(int); 75 #endif 76 static int gettype(char *, const char *const *); 77 78 static const char *db_array[2] = { _PATH_DISKTAB, 0 }; 79 80 int 81 setdisktab(const char *name) 82 { 83 if (!name || !*name) 84 return -1; 85 86 db_array[0] = name; 87 return 0; 88 } 89 90 91 struct disklabel * 92 getdiskbyname(const char *name) 93 { 94 static struct disklabel disk; 95 struct disklabel *dp = &disk; 96 struct partition *pp; 97 char *buf; 98 char *cp, *cq; /* can't be */ 99 char p, max, psize[3], pbsize[3], 100 pfsize[3], poffset[3], ptype[3]; 101 u_int32_t *dx; 102 long f; 103 104 _DIAGASSERT(name != NULL); 105 106 if (cgetent(&buf, db_array, name) < 0) 107 return NULL; 108 109 memset(&disk, 0, sizeof(disk)); 110 /* 111 * typename 112 */ 113 cq = dp->d_typename; 114 cp = buf; 115 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && 116 (*cq = *cp) && *cq != '|' && *cq != ':') 117 cq++, cp++; 118 *cq = '\0'; 119 /* 120 * boot name (optional) xxboot, bootxx 121 */ 122 cgetstr(buf, "b0", &dp->d_boot0); 123 cgetstr(buf, "b1", &dp->d_boot1); 124 125 if (cgetstr(buf, "ty", &cq) >= 0) { 126 if (strcmp(cq, "removable") == 0) 127 dp->d_flags |= D_REMOVABLE; 128 else if (strcmp(cq, "simulated") == 0) 129 dp->d_flags |= D_RAMDISK; 130 free(cq); 131 } 132 if (cgetcap(buf, "sf", ':') != NULL) 133 dp->d_flags |= D_BADSECT; 134 135 #define getnumdflt(field, dname, dflt) \ 136 (field) = ((cgetnum(buf, dname, &f) == -1) ? (dflt) : (u_int32_t) f) 137 #define getnum(field, dname) \ 138 if (cgetnum(buf, dname, &f) != -1) field = (u_int32_t)f 139 140 getnumdflt(dp->d_secsize, "se", DEV_BSIZE); 141 getnum(dp->d_ntracks, "nt"); 142 getnum(dp->d_nsectors, "ns"); 143 getnum(dp->d_ncylinders, "nc"); 144 145 if (cgetstr(buf, "dt", &cq) >= 0) { 146 dp->d_type = gettype(cq, dktypenames); 147 free(cq); 148 } else 149 getnumdflt(dp->d_type, "dt", 0); 150 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); 151 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); 152 getnumdflt(dp->d_rpm, "rm", 3600); 153 getnumdflt(dp->d_interleave, "il", 1); 154 getnumdflt(dp->d_trackskew, "sk", 0); 155 getnumdflt(dp->d_cylskew, "cs", 0); 156 getnumdflt(dp->d_headswitch, "hs", 0); 157 getnumdflt(dp->d_trkseek, "ts", 0); 158 getnumdflt(dp->d_bbsize, "bs", BBSIZE); 159 getnumdflt(dp->d_sbsize, "sb", SBLOCKSIZE); 160 strcpy(psize, "px"); /* XXX: strcpy is safe */ 161 strcpy(pbsize, "bx"); /* XXX: strcpy is safe */ 162 strcpy(pfsize, "fx"); /* XXX: strcpy is safe */ 163 strcpy(poffset, "ox"); /* XXX: strcpy is safe */ 164 strcpy(ptype, "tx"); /* XXX: strcpy is safe */ 165 max = 'a' - 1; 166 pp = &dp->d_partitions[0]; 167 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) { 168 long ff; 169 170 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; 171 if (cgetnum(buf, psize, &ff) == -1) 172 pp->p_size = 0; 173 else { 174 pp->p_size = (u_int32_t)ff; 175 getnum(pp->p_offset, poffset); 176 getnumdflt(pp->p_fsize, pfsize, 0); 177 if (pp->p_fsize) { 178 long bsize; 179 180 if (cgetnum(buf, pbsize, &bsize) == -1) 181 pp->p_frag = 8; 182 else 183 pp->p_frag = 184 (u_int8_t)(bsize / pp->p_fsize); 185 } 186 getnumdflt(pp->p_fstype, ptype, 0); 187 if (pp->p_fstype == 0) 188 if (cgetstr(buf, ptype, &cq) >= 0) { 189 pp->p_fstype = gettype(cq, fstypenames); 190 free(cq); 191 } 192 max = p; 193 } 194 } 195 dp->d_npartitions = max + 1 - 'a'; 196 strcpy(psize, "dx"); /* XXX: strcpy is safe */ 197 dx = dp->d_drivedata; 198 for (p = '0'; p < '0' + NDDATA; p++, dx++) { 199 psize[1] = p; 200 getnumdflt(*dx, psize, 0); 201 } 202 dp->d_magic = DISKMAGIC; 203 dp->d_magic2 = DISKMAGIC; 204 free(buf); 205 return (dp); 206 } 207 208 static int 209 gettype(char *t, const char *const *names) 210 { 211 const char *const *nm; 212 213 _DIAGASSERT(t != NULL); 214 _DIAGASSERT(names != NULL); 215 216 for (nm = names; *nm; nm++) 217 if (strcasecmp(t, *nm) == 0) 218 return (int)(nm - names); 219 if (isdigit((unsigned char) *t)) 220 return (atoi(t)); 221 return (0); 222 } 223 224 #if 0 225 static void 226 error(err) 227 int err; 228 { 229 char *p; 230 231 (void)write(STDERR_FILENO, "disktab: ", 9); 232 (void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1); 233 (void)write(STDERR_FILENO, ": ", 2); 234 p = strerror(err); 235 (void)write(STDERR_FILENO, p, strlen(p)); 236 (void)write(STDERR_FILENO, "\n", 1); 237 } 238 #endif 239
Indexes created Sat Sep 20 22:09:52 GMT 2025