| 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/disklabel.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 | } |