disklabel.c revision 1.15
1 /* $NetBSD: disklabel.c,v 1.15 1997/07/21 14:06:53 jtc 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 8.1 (Berkeley) 6/4/93"; 40 #else 41 __RCSID("$NetBSD: disklabel.c,v 1.15 1997/07/21 14:06:53 jtc Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "namespace.h" 46 #include <sys/param.h> 47 #define DKTYPENAMES 48 #include <sys/disklabel.h> 49 #include <ufs/ffs/fs.h> 50 51 #include <ctype.h> 52 #include <errno.h> 53 #include <fcntl.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 59 #ifdef __weak_alias 60 __weak_alias(getdiskbyname,_getdiskbyname); 61 #endif 62 63 #if 0 64 static void error __P((int)); 65 #endif 66 static int gettype __P((char *, char **)); 67 68 struct disklabel * 69 getdiskbyname(name) 70 const char *name; 71 { 72 static struct disklabel disk; 73 register struct disklabel *dp = &disk; 74 register struct partition *pp; 75 char *buf; 76 char *db_array[2] = { _PATH_DISKTAB, 0 }; 77 char *cp, *cq; /* can't be register */ 78 char p, max, psize[3], pbsize[3], 79 pfsize[3], poffset[3], ptype[3]; 80 u_int32_t *dx; 81 82 if (cgetent(&buf, db_array, (char *) name) < 0) 83 return NULL; 84 85 bzero((char *)&disk, sizeof(disk)); 86 /* 87 * typename 88 */ 89 cq = dp->d_typename; 90 cp = buf; 91 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && 92 (*cq = *cp) && *cq != '|' && *cq != ':') 93 cq++, cp++; 94 *cq = '\0'; 95 /* 96 * boot name (optional) xxboot, bootxx 97 */ 98 cgetstr(buf, "b0", &dp->d_boot0); 99 cgetstr(buf, "b1", &dp->d_boot1); 100 101 if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0) 102 dp->d_flags |= D_REMOVABLE; 103 else if (cq && strcmp(cq, "simulated") == 0) 104 dp->d_flags |= D_RAMDISK; 105 if (cgetcap(buf, "sf", ':') != NULL) 106 dp->d_flags |= D_BADSECT; 107 108 #define getnumdflt(field, dname, dflt) \ 109 { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; } 110 #define getnum(field, dname) \ 111 { long f; cgetnum(buf, dname, &f); field = f; } 112 113 getnumdflt(dp->d_secsize, "se", DEV_BSIZE); 114 getnum(dp->d_ntracks, "nt"); 115 getnum(dp->d_nsectors, "ns"); 116 getnum(dp->d_ncylinders, "nc"); 117 118 if (cgetstr(buf, "dt", &cq) > 0) 119 dp->d_type = gettype(cq, dktypenames); 120 else 121 getnumdflt(dp->d_type, "dt", 0); 122 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); 123 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); 124 getnumdflt(dp->d_rpm, "rm", 3600); 125 getnumdflt(dp->d_interleave, "il", 1); 126 getnumdflt(dp->d_trackskew, "sk", 0); 127 getnumdflt(dp->d_cylskew, "cs", 0); 128 getnumdflt(dp->d_headswitch, "hs", 0); 129 getnumdflt(dp->d_trkseek, "ts", 0); 130 getnumdflt(dp->d_bbsize, "bs", BBSIZE); 131 getnumdflt(dp->d_sbsize, "sb", SBSIZE); 132 strcpy(psize, "px"); /* XXX: strcpy is safe */ 133 strcpy(pbsize, "bx"); /* XXX: strcpy is safe */ 134 strcpy(pfsize, "fx"); /* XXX: strcpy is safe */ 135 strcpy(poffset, "ox"); /* XXX: strcpy is safe */ 136 strcpy(ptype, "tx"); /* XXX: strcpy is safe */ 137 max = 'a' - 1; 138 pp = &dp->d_partitions[0]; 139 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) { 140 long f; 141 142 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; 143 if (cgetnum(buf, psize, &f) == -1) 144 pp->p_size = 0; 145 else { 146 pp->p_size = f; 147 getnum(pp->p_offset, poffset); 148 getnumdflt(pp->p_fsize, pfsize, 0); 149 if (pp->p_fsize) { 150 long bsize; 151 152 if (cgetnum(buf, pbsize, &bsize) == 0) 153 pp->p_frag = bsize / pp->p_fsize; 154 else 155 pp->p_frag = 8; 156 } 157 getnumdflt(pp->p_fstype, ptype, 0); 158 if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) 159 pp->p_fstype = gettype(cq, fstypenames); 160 max = p; 161 } 162 } 163 dp->d_npartitions = max + 1 - 'a'; 164 strcpy(psize, "dx"); /* XXX: strcpy is safe */ 165 dx = dp->d_drivedata; 166 for (p = '0'; p < '0' + NDDATA; p++, dx++) { 167 psize[1] = p; 168 getnumdflt(*dx, psize, 0); 169 } 170 dp->d_magic = DISKMAGIC; 171 dp->d_magic2 = DISKMAGIC; 172 free(buf); 173 return (dp); 174 } 175 176 static int 177 gettype(t, names) 178 char *t; 179 char **names; 180 { 181 register char **nm; 182 183 for (nm = names; *nm; nm++) 184 if (strcasecmp(t, *nm) == 0) 185 return (nm - names); 186 if (isdigit(*t)) 187 return (atoi(t)); 188 return (0); 189 } 190 191 #if 0 192 static void 193 error(err) 194 int err; 195 { 196 char *p; 197 198 (void)write(STDERR_FILENO, "disktab: ", 9); 199 (void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1); 200 (void)write(STDERR_FILENO, ": ", 2); 201 p = strerror(err); 202 (void)write(STDERR_FILENO, p, strlen(p)); 203 (void)write(STDERR_FILENO, "\n", 1); 204 } 205 #endif 206
Indexes created Mon Sep 22 13:09:51 GMT 2025