disklabel.c revision 1.24
1 /* $NetBSD: disklabel.c,v 1.24 1999/09/16 11:44:56 lukem 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 1.24 1999/09/16 11:44:56 lukem 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 #ifdef _DIAGNOSTIC 103 if (name == NULL) 104 return NULL; 105 #endif 106 107 if (cgetent(&buf, db_array, name) < 0) 108 return NULL; 109 110 memset(&disk, 0, sizeof(disk)); 111 /* 112 * typename 113 */ 114 cq = dp->d_typename; 115 cp = buf; 116 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && 117 (*cq = *cp) && *cq != '|' && *cq != ':') 118 cq++, cp++; 119 *cq = '\0'; 120 /* 121 * boot name (optional) xxboot, bootxx 122 */ 123 cgetstr(buf, "b0", &dp->d_boot0); 124 cgetstr(buf, "b1", &dp->d_boot1); 125 126 if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0) 127 dp->d_flags |= D_REMOVABLE; 128 else if (cq && strcmp(cq, "simulated") == 0) 129 dp->d_flags |= D_RAMDISK; 130 if (cgetcap(buf, "sf", ':') != NULL) 131 dp->d_flags |= D_BADSECT; 132 133 #define getnumdflt(field, dname, dflt) \ 134 (field) = (u_int32_t) ((cgetnum(buf, dname, &f) == -1) ? (dflt) : f) 135 #define getnum(field, dname) \ 136 if (cgetnum(buf, dname, &f) != -1) field = (u_int32_t)f 137 138 getnumdflt(dp->d_secsize, "se", DEV_BSIZE); 139 getnum(dp->d_ntracks, "nt"); 140 getnum(dp->d_nsectors, "ns"); 141 getnum(dp->d_ncylinders, "nc"); 142 143 if (cgetstr(buf, "dt", &cq) > 0) 144 dp->d_type = gettype(cq, dktypenames); 145 else 146 getnumdflt(dp->d_type, "dt", 0); 147 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); 148 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); 149 getnumdflt(dp->d_rpm, "rm", 3600); 150 getnumdflt(dp->d_interleave, "il", 1); 151 getnumdflt(dp->d_trackskew, "sk", 0); 152 getnumdflt(dp->d_cylskew, "cs", 0); 153 getnumdflt(dp->d_headswitch, "hs", 0); 154 getnumdflt(dp->d_trkseek, "ts", 0); 155 getnumdflt(dp->d_bbsize, "bs", BBSIZE); 156 getnumdflt(dp->d_sbsize, "sb", SBSIZE); 157 strcpy(psize, "px"); /* XXX: strcpy is safe */ 158 strcpy(pbsize, "bx"); /* XXX: strcpy is safe */ 159 strcpy(pfsize, "fx"); /* XXX: strcpy is safe */ 160 strcpy(poffset, "ox"); /* XXX: strcpy is safe */ 161 strcpy(ptype, "tx"); /* XXX: strcpy is safe */ 162 max = 'a' - 1; 163 pp = &dp->d_partitions[0]; 164 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) { 165 long ff; 166 167 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; 168 if (cgetnum(buf, psize, &ff) == -1) 169 pp->p_size = 0; 170 else { 171 pp->p_size = (u_int32_t)ff; 172 getnum(pp->p_offset, poffset); 173 getnumdflt(pp->p_fsize, pfsize, 0); 174 if (pp->p_fsize) { 175 long bsize; 176 177 if (cgetnum(buf, pbsize, &bsize) == -1) 178 pp->p_frag = 8; 179 else 180 pp->p_frag = 181 (u_int8_t)(bsize / pp->p_fsize); 182 } 183 getnumdflt(pp->p_fstype, ptype, 0); 184 if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) 185 pp->p_fstype = gettype(cq, fstypenames); 186 max = p; 187 } 188 } 189 dp->d_npartitions = max + 1 - 'a'; 190 strcpy(psize, "dx"); /* XXX: strcpy is safe */ 191 dx = dp->d_drivedata; 192 for (p = '0'; p < '0' + NDDATA; p++, dx++) { 193 psize[1] = p; 194 getnumdflt(*dx, psize, 0); 195 } 196 dp->d_magic = DISKMAGIC; 197 dp->d_magic2 = DISKMAGIC; 198 free(buf); 199 return (dp); 200 } 201 202 static int 203 gettype(t, names) 204 char *t; 205 const char *const *names; 206 { 207 const char *const *nm; 208 209 _DIAGASSERT(t != NULL); 210 _DIAGASSERT(names != NULL); 211 212 for (nm = names; *nm; nm++) 213 if (strcasecmp(t, *nm) == 0) 214 return (nm - names); 215 if (isdigit(*t)) 216 return (atoi(t)); 217 return (0); 218 } 219 220 #if 0 221 static void 222 error(err) 223 int err; 224 { 225 char *p; 226 227 (void)write(STDERR_FILENO, "disktab: ", 9); 228 (void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1); 229 (void)write(STDERR_FILENO, ": ", 2); 230 p = strerror(err); 231 (void)write(STDERR_FILENO, p, strlen(p)); 232 (void)write(STDERR_FILENO, "\n", 1); 233 } 234 #endif 235
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