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 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 5/3/95"; 37 #endif 38 static const char rcsid[] = 39 "$Id: disklabel.c,v 1.5 1997/02/22 14:58:01 peter Exp $"; 40 #endif /* not lint */ 41 42 #include <sys/param.h> 43 #define DKTYPENAMES 44 #include <sys/disklabel.h> 45 #include <ufs/ufs/dinode.h> 46 #include <ufs/ffs/fs.h> 47 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 #include <ctype.h> 55 56 static int gettype __P((char *, char **)); 57 58 struct disklabel * 59 getdiskbyname(name) 60 const char *name; 61 { 62 static struct disklabel disk; 63 register struct disklabel *dp = &disk; 64 register struct partition *pp; 65 char *buf; 66 char *db_array[2] = { _PATH_DISKTAB, 0 }; 67 char *cp, *cq; /* can't be register */ 68 char p, max, psize[3], pbsize[3], 69 pfsize[3], poffset[3], ptype[3]; 70 u_int32_t *dx; 71 72 if (cgetent(&buf, db_array, (char *) name) < 0) 73 return NULL; 74 75 bzero((char *)&disk, sizeof(disk)); 76 /* 77 * typename 78 */ 79 cq = dp->d_typename; 80 cp = buf; 81 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && 82 (*cq = *cp) && *cq != '|' && *cq != ':') 83 cq++, cp++; 84 *cq = '\0'; 85 /* 86 * boot name (optional) xxboot, bootxx 87 */ 88 cgetstr(buf, "b0", &dp->d_boot0); 89 cgetstr(buf, "b1", &dp->d_boot1); 90 91 if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0) 92 dp->d_flags |= D_REMOVABLE; 93 else if (cq && strcmp(cq, "simulated") == 0) 94 dp->d_flags |= D_RAMDISK; 95 if (cgetcap(buf, "sf", ':') != NULL) 96 dp->d_flags |= D_BADSECT; 97 98 #define getnumdflt(field, dname, dflt) \ 99 { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; } 100 101 getnumdflt(dp->d_secsize, "se", DEV_BSIZE); 102 cgetnum(buf, "nt",(long *) &dp->d_ntracks); 103 cgetnum(buf, "ns",(long *) &dp->d_nsectors); 104 cgetnum(buf, "nc",(long *) &dp->d_ncylinders); 105 106 if (cgetstr(buf, "dt", &cq) > 0) 107 dp->d_type = gettype(cq, dktypenames); 108 else 109 getnumdflt(dp->d_type, "dt", 0); 110 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); 111 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); 112 getnumdflt(dp->d_rpm, "rm", 3600); 113 getnumdflt(dp->d_interleave, "il", 1); 114 getnumdflt(dp->d_trackskew, "sk", 0); 115 getnumdflt(dp->d_cylskew, "cs", 0); 116 getnumdflt(dp->d_headswitch, "hs", 0); 117 getnumdflt(dp->d_trkseek, "ts", 0); 118 getnumdflt(dp->d_bbsize, "bs", BBSIZE); 119 getnumdflt(dp->d_sbsize, "sb", SBSIZE); 120 strcpy(psize, "px"); 121 strcpy(pbsize, "bx"); 122 strcpy(pfsize, "fx"); 123 strcpy(poffset, "ox"); 124 strcpy(ptype, "tx"); 125 max = 'a' - 1; 126 pp = &dp->d_partitions[0]; 127 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) { 128 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; 129 if (cgetnum(buf, psize,(long *) &pp->p_size) == -1) 130 pp->p_size = 0; 131 else { 132 cgetnum(buf, poffset, (long *) &pp->p_offset); 133 getnumdflt(pp->p_fsize, pfsize, 0); 134 if (pp->p_fsize) { 135 long bsize; 136 137 if (cgetnum(buf, pbsize, &bsize) == 0) 138 pp->p_frag = bsize / pp->p_fsize; 139 else 140 pp->p_frag = 8; 141 } 142 getnumdflt(pp->p_fstype, ptype, 0); 143 if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) 144 pp->p_fstype = gettype(cq, fstypenames); 145 max = p; 146 } 147 } 148 dp->d_npartitions = max + 1 - 'a'; 149 (void)strcpy(psize, "dx"); 150 dx = dp->d_drivedata; 151 for (p = '0'; p < '0' + NDDATA; p++, dx++) { 152 psize[1] = p; 153 getnumdflt(*dx, psize, 0); 154 } 155 dp->d_magic = DISKMAGIC; 156 dp->d_magic2 = DISKMAGIC; 157 free(buf); 158 return (dp); 159 } 160 161 static int 162 gettype(t, names) 163 char *t; 164 char **names; 165 { 166 register char **nm; 167 168 for (nm = names; *nm; nm++) 169 if (strcasecmp(t, *nm) == 0) 170 return (nm - names); 171 if (isdigit(*t)) 172 return (atoi(t)); 173 return (0); 174 } 175