1 /* 2 * Copyright (c) 1983, 1987, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)disklabel.c 8.2 (Berkeley) 5/3/95 34 * $FreeBSD: src/lib/libc/gen/disklabel.c,v 1.9.2.1 2001/03/05 08:40:47 obrien Exp $ 35 * $DragonFly: src/lib/libc/gen/disktab.c,v 1.8 2005/11/19 22:32:53 swildner Exp $ 36 */ 37 38 #include <sys/param.h> 39 #define DKTYPENAMES 40 #include <sys/disklabel.h> 41 #include <vfs/ufs/dinode.h> 42 #include <vfs/ufs/fs.h> 43 44 #include <fcntl.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <unistd.h> 49 #include <ctype.h> 50 51 static int gettype (const char *, const char **); 52 53 struct disklabel * 54 getdiskbyname(const char *name) 55 { 56 static struct disklabel disk; 57 struct disklabel *dp = &disk; 58 struct partition *pp; 59 char *buf; 60 char *db_array[2] = { _PATH_DISKTAB, 0 }; 61 char *cp, *cq; /* can't be register */ 62 char p, max, psize[3], pbsize[3], 63 pfsize[3], poffset[3], ptype[3]; 64 u_int32_t *dx; 65 66 if (cgetent(&buf, db_array, (char *)name) < 0) 67 return NULL; 68 69 bzero((char *)&disk, sizeof(disk)); 70 /* 71 * typename 72 */ 73 cq = dp->d_typename; 74 cp = buf; 75 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && 76 (*cq = *cp) && *cq != '|' && *cq != ':') 77 cq++, cp++; 78 *cq = '\0'; 79 /* 80 * boot name (optional) xxboot, bootxx 81 */ 82 cgetstr(buf, "b0", &dp->d_boot0); 83 cgetstr(buf, "b1", &dp->d_boot1); 84 85 if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0) 86 dp->d_flags |= D_REMOVABLE; 87 else if (cq && strcmp(cq, "simulated") == 0) 88 dp->d_flags |= D_RAMDISK; 89 if (cgetcap(buf, "sf", ':') != NULL) 90 dp->d_flags |= D_BADSECT; 91 92 #define getnumdflt(field, dname, dflt) \ 93 { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; } 94 95 getnumdflt(dp->d_secsize, "se", DEV_BSIZE); 96 getnumdflt(dp->d_ntracks, "nt", 0); 97 getnumdflt(dp->d_nsectors, "ns", 0); 98 getnumdflt(dp->d_ncylinders, "nc", 0); 99 100 if (cgetstr(buf, "dt", &cq) > 0) 101 dp->d_type = gettype(cq, dktypenames); 102 else 103 getnumdflt(dp->d_type, "dt", 0); 104 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); 105 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); 106 getnumdflt(dp->d_rpm, "rm", 3600); 107 getnumdflt(dp->d_interleave, "il", 1); 108 getnumdflt(dp->d_trackskew, "sk", 0); 109 getnumdflt(dp->d_cylskew, "cs", 0); 110 getnumdflt(dp->d_headswitch, "hs", 0); 111 getnumdflt(dp->d_trkseek, "ts", 0); 112 getnumdflt(dp->d_bbsize, "bs", BBSIZE); 113 getnumdflt(dp->d_sbsize, "sb", SBSIZE); 114 strcpy(psize, "px"); 115 strcpy(pbsize, "bx"); 116 strcpy(pfsize, "fx"); 117 strcpy(poffset, "ox"); 118 strcpy(ptype, "tx"); 119 max = 'a' - 1; 120 pp = &dp->d_partitions[0]; 121 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) { 122 long l; 123 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; 124 if (cgetnum(buf, psize, &l) == -1) 125 pp->p_size = 0; 126 else { 127 pp->p_size = l; 128 cgetnum(buf, poffset, &l); 129 pp->p_offset = l; 130 getnumdflt(pp->p_fsize, pfsize, 0); 131 if (pp->p_fsize) { 132 long bsize; 133 134 if (cgetnum(buf, pbsize, &bsize) == 0) 135 pp->p_frag = bsize / pp->p_fsize; 136 else 137 pp->p_frag = 8; 138 } 139 getnumdflt(pp->p_fstype, ptype, 0); 140 if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) 141 pp->p_fstype = gettype(cq, fstypenames); 142 max = p; 143 } 144 } 145 dp->d_npartitions = max + 1 - 'a'; 146 strcpy(psize, "dx"); 147 dx = dp->d_drivedata; 148 for (p = '0'; p < '0' + NDDATA; p++, dx++) { 149 psize[1] = p; 150 getnumdflt(*dx, psize, 0); 151 } 152 dp->d_magic = DISKMAGIC; 153 dp->d_magic2 = DISKMAGIC; 154 free(buf); 155 return (dp); 156 } 157 158 static int 159 gettype(const char *t, const char **names) 160 { 161 const char **nm; 162 163 for (nm = names; *nm; nm++) 164 if (strcasecmp(t, *nm) == 0) 165 return (nm - names); 166 if (isdigit((unsigned char)*t)) 167 return (atoi(t)); 168 return (0); 169 } 170