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 1.13 2007/06/18 05:13:34 dillon Exp $ 36 */ 37 38 #include <sys/param.h> 39 #define DKTYPENAMES 40 #include <sys/disklabel32.h> 41 #include <sys/dtype.h> 42 #include <vfs/ufs/dinode.h> 43 #include <vfs/ufs/fs.h> 44 45 #include <fcntl.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 #include <ctype.h> 51 #include <disktab.h> 52 53 static int gettype (const char *, const char **); 54 55 struct disklabel32 * 56 getdiskbyname(const char *name) 57 { 58 static struct disklabel32 disk; 59 struct disklabel32 *dp = &disk; 60 struct partition32 *pp; 61 char *buf; 62 char *db_array[2] = { _PATH_DISKTAB, 0 }; 63 char *cp, *cq; /* can't be register */ 64 char p, max, psize[3], pbsize[3], 65 pfsize[3], poffset[3], ptype[3]; 66 u_int32_t *dx; 67 68 if (cgetent(&buf, db_array, (char *)name) < 0) 69 return NULL; 70 71 bzero((char *)&disk, sizeof(disk)); 72 /* 73 * typename 74 */ 75 cq = dp->d_typename; 76 cp = buf; 77 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && 78 (*cq = *cp) && *cq != '|' && *cq != ':') 79 cq++, cp++; 80 *cq = '\0'; 81 82 #define getnumdflt(field, dname, dflt) \ 83 { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; } 84 85 getnumdflt(dp->d_secsize, "se", DEV_BSIZE); 86 getnumdflt(dp->d_ntracks, "nt", 0); 87 getnumdflt(dp->d_nsectors, "ns", 0); 88 getnumdflt(dp->d_ncylinders, "nc", 0); 89 90 if (cgetstr(buf, "dt", &cq) > 0) 91 dp->d_type = gettype(cq, dktypenames); 92 else 93 getnumdflt(dp->d_type, "dt", 0); 94 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); 95 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); 96 getnumdflt(dp->d_rpm, "rm", 3600); 97 getnumdflt(dp->d_interleave, "il", 1); 98 getnumdflt(dp->d_trackskew, "sk", 0); 99 getnumdflt(dp->d_cylskew, "cs", 0); 100 getnumdflt(dp->d_headswitch, "hs", 0); 101 getnumdflt(dp->d_trkseek, "ts", 0); 102 getnumdflt(dp->d_bbsize, "bs", BBSIZE); 103 getnumdflt(dp->d_sbsize, "sb", SBSIZE); 104 strcpy(psize, "px"); 105 strcpy(pbsize, "bx"); 106 strcpy(pfsize, "fx"); 107 strcpy(poffset, "ox"); 108 strcpy(ptype, "tx"); 109 max = 'a' - 1; 110 pp = &dp->d_partitions[0]; 111 for (p = 'a'; p < 'a' + MAXPARTITIONS32; p++, pp++) { 112 long l; 113 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; 114 if (cgetnum(buf, psize, &l) == -1) 115 pp->p_size = 0; 116 else { 117 pp->p_size = l; 118 cgetnum(buf, poffset, &l); 119 pp->p_offset = l; 120 getnumdflt(pp->p_fsize, pfsize, 0); 121 if (pp->p_fsize) { 122 long bsize; 123 124 if (cgetnum(buf, pbsize, &bsize) == 0) 125 pp->p_frag = bsize / pp->p_fsize; 126 else 127 pp->p_frag = 8; 128 } 129 getnumdflt(pp->p_fstype, ptype, 0); 130 if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) 131 pp->p_fstype = gettype(cq, fstypenames); 132 max = p; 133 } 134 } 135 dp->d_npartitions = max + 1 - 'a'; 136 strcpy(psize, "dx"); 137 dx = dp->d_drivedata; 138 for (p = '0'; p < '0' + NDDATA32; p++, dx++) { 139 psize[1] = p; 140 getnumdflt(*dx, psize, 0); 141 } 142 dp->d_magic = DISKMAGIC32; 143 dp->d_magic2 = DISKMAGIC32; 144 free(buf); 145 return (dp); 146 } 147 148 static int 149 gettype(const char *t, const char **names) 150 { 151 const char **nm; 152 153 for (nm = names; *nm; nm++) 154 if (strcasecmp(t, *nm) == 0) 155 return (nm - names); 156 if (isdigit((unsigned char)*t)) 157 return (atoi(t)); 158 return (0); 159 } 160