1 /* $NetBSD: disklabel.c,v 1.27 2000/07/07 08:03:36 itohy 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 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 1.27 2000/07/07 08:03:36 itohy 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 <sys/disklabel.h> 50 #include <ufs/ufs/dinode.h> 51 #include <ufs/ffs/fs.h> 52 53 #include <assert.h> 54 #include <ctype.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 62 #include <disktab.h> 63 64 #ifdef __weak_alias 65 __weak_alias(getdiskbyname,_getdiskbyname) 66 #endif 67 68 #if 0 69 static void error __P((int)); 70 #endif 71 static int gettype __P((char *, const char *const *)); 72 73 static char *db_array[2] = { _PATH_DISKTAB, 0 }; 74 75 int 76 setdisktab(name) 77 char *name; 78 { 79 if (!name || !*name) 80 return -1; 81 82 db_array[0] = name; 83 return 0; 84 } 85 86 87 struct disklabel * 88 getdiskbyname(name) 89 const char *name; 90 { 91 static struct disklabel disk; 92 struct disklabel *dp = &disk; 93 struct partition *pp; 94 char *buf; 95 char *cp, *cq; /* can't be */ 96 char p, max, psize[3], pbsize[3], 97 pfsize[3], poffset[3], ptype[3]; 98 u_int32_t *dx; 99 long f; 100 101 _DIAGASSERT(name != NULL); 102 103 if (cgetent(&buf, db_array, name) < 0) 104 return NULL; 105 106 memset(&disk, 0, sizeof(disk)); 107 /* 108 * typename 109 */ 110 cq = dp->d_typename; 111 cp = buf; 112 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && 113 (*cq = *cp) && *cq != '|' && *cq != ':') 114 cq++, cp++; 115 *cq = '\0'; 116 /* 117 * boot name (optional) xxboot, bootxx 118 */ 119 cgetstr(buf, "b0", &dp->d_boot0); 120 cgetstr(buf, "b1", &dp->d_boot1); 121 122 if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0) 123 dp->d_flags |= D_REMOVABLE; 124 else if (cq && strcmp(cq, "simulated") == 0) 125 dp->d_flags |= D_RAMDISK; 126 if (cgetcap(buf, "sf", ':') != NULL) 127 dp->d_flags |= D_BADSECT; 128 129 #define getnumdflt(field, dname, dflt) \ 130 (field) = (u_int32_t) ((cgetnum(buf, dname, &f) == -1) ? (dflt) : f) 131 #define getnum(field, dname) \ 132 if (cgetnum(buf, dname, &f) != -1) field = (u_int32_t)f 133 134 getnumdflt(dp->d_secsize, "se", DEV_BSIZE); 135 getnum(dp->d_ntracks, "nt"); 136 getnum(dp->d_nsectors, "ns"); 137 getnum(dp->d_ncylinders, "nc"); 138 139 if (cgetstr(buf, "dt", &cq) > 0) 140 dp->d_type = gettype(cq, dktypenames); 141 else 142 getnumdflt(dp->d_type, "dt", 0); 143 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); 144 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); 145 getnumdflt(dp->d_rpm, "rm", 3600); 146 getnumdflt(dp->d_interleave, "il", 1); 147 getnumdflt(dp->d_trackskew, "sk", 0); 148 getnumdflt(dp->d_cylskew, "cs", 0); 149 getnumdflt(dp->d_headswitch, "hs", 0); 150 getnumdflt(dp->d_trkseek, "ts", 0); 151 getnumdflt(dp->d_bbsize, "bs", BBSIZE); 152 getnumdflt(dp->d_sbsize, "sb", SBSIZE); 153 strcpy(psize, "px"); /* XXX: strcpy is safe */ 154 strcpy(pbsize, "bx"); /* XXX: strcpy is safe */ 155 strcpy(pfsize, "fx"); /* XXX: strcpy is safe */ 156 strcpy(poffset, "ox"); /* XXX: strcpy is safe */ 157 strcpy(ptype, "tx"); /* XXX: strcpy is safe */ 158 max = 'a' - 1; 159 pp = &dp->d_partitions[0]; 160 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) { 161 long ff; 162 163 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; 164 if (cgetnum(buf, psize, &ff) == -1) 165 pp->p_size = 0; 166 else { 167 pp->p_size = (u_int32_t)ff; 168 getnum(pp->p_offset, poffset); 169 getnumdflt(pp->p_fsize, pfsize, 0); 170 if (pp->p_fsize) { 171 long bsize; 172 173 if (cgetnum(buf, pbsize, &bsize) == -1) 174 pp->p_frag = 8; 175 else 176 pp->p_frag = 177 (u_int8_t)(bsize / pp->p_fsize); 178 } 179 getnumdflt(pp->p_fstype, ptype, 0); 180 if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) 181 pp->p_fstype = gettype(cq, fstypenames); 182 max = p; 183 } 184 } 185 dp->d_npartitions = max + 1 - 'a'; 186 strcpy(psize, "dx"); /* XXX: strcpy is safe */ 187 dx = dp->d_drivedata; 188 for (p = '0'; p < '0' + NDDATA; p++, dx++) { 189 psize[1] = p; 190 getnumdflt(*dx, psize, 0); 191 } 192 dp->d_magic = DISKMAGIC; 193 dp->d_magic2 = DISKMAGIC; 194 free(buf); 195 return (dp); 196 } 197 198 static int 199 gettype(t, names) 200 char *t; 201 const char *const *names; 202 { 203 const char *const *nm; 204 205 _DIAGASSERT(t != NULL); 206 _DIAGASSERT(names != NULL); 207 208 for (nm = names; *nm; nm++) 209 if (strcasecmp(t, *nm) == 0) 210 return (nm - names); 211 if (isdigit((unsigned char) *t)) 212 return (atoi(t)); 213 return (0); 214 } 215 216 #if 0 217 static void 218 error(err) 219 int err; 220 { 221 char *p; 222 223 (void)write(STDERR_FILENO, "disktab: ", 9); 224 (void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1); 225 (void)write(STDERR_FILENO, ": ", 2); 226 p = strerror(err); 227 (void)write(STDERR_FILENO, p, strlen(p)); 228 (void)write(STDERR_FILENO, "\n", 1); 229 } 230 #endif 231