disklabel.c revision 1.11.4.1
1 /* $NetBSD: disklabel.c,v 1.11.4.1 1996/09/19 20:02:25 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 #if defined(LIBC_SCCS) && !defined(lint) 37 #if 0 38 static char sccsid[] = "@(#)disklabel.c 8.1 (Berkeley) 6/4/93"; 39 #else 40 static char rcsid[] = "$NetBSD: disklabel.c,v 1.11.4.1 1996/09/19 20:02:25 jtc Exp $"; 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include "namespace.h" 45 #include <sys/param.h> 46 #define DKTYPENAMES 47 #include <sys/disklabel.h> 48 #include <ufs/ffs/fs.h> 49 50 #include <ctype.h> 51 #include <errno.h> 52 #include <fcntl.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 58 #ifdef __weak_alias 59 __weak_alias(getdiskbyname,_getdiskbyname); 60 #endif 61 62 static void error __P((int)); 63 static int gettype __P((char *, char **)); 64 65 struct disklabel * 66 getdiskbyname(name) 67 const char *name; 68 { 69 static struct disklabel disk; 70 register struct disklabel *dp = &disk; 71 register struct partition *pp; 72 char *buf; 73 char *db_array[2] = { _PATH_DISKTAB, 0 }; 74 char *cp, *cq; /* can't be register */ 75 char p, max, psize[3], pbsize[3], 76 pfsize[3], poffset[3], ptype[3]; 77 u_int32_t *dx; 78 79 if (cgetent(&buf, db_array, (char *) name) < 0) 80 return NULL; 81 82 bzero((char *)&disk, sizeof(disk)); 83 /* 84 * typename 85 */ 86 cq = dp->d_typename; 87 cp = buf; 88 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && 89 (*cq = *cp) && *cq != '|' && *cq != ':') 90 cq++, cp++; 91 *cq = '\0'; 92 /* 93 * boot name (optional) xxboot, bootxx 94 */ 95 cgetstr(buf, "b0", &dp->d_boot0); 96 cgetstr(buf, "b1", &dp->d_boot1); 97 98 if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0) 99 dp->d_flags |= D_REMOVABLE; 100 else if (cq && strcmp(cq, "simulated") == 0) 101 dp->d_flags |= D_RAMDISK; 102 if (cgetcap(buf, "sf", ':') != NULL) 103 dp->d_flags |= D_BADSECT; 104 105 #define getnumdflt(field, dname, dflt) \ 106 { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; } 107 #define getnum(field, dname) \ 108 { long f; cgetnum(buf, dname, &f); field = f; } 109 110 getnumdflt(dp->d_secsize, "se", DEV_BSIZE); 111 getnum(dp->d_ntracks, "nt"); 112 getnum(dp->d_nsectors, "ns"); 113 getnum(dp->d_ncylinders, "nc"); 114 115 if (cgetstr(buf, "dt", &cq) > 0) 116 dp->d_type = gettype(cq, dktypenames); 117 else 118 getnumdflt(dp->d_type, "dt", 0); 119 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); 120 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); 121 getnumdflt(dp->d_rpm, "rm", 3600); 122 getnumdflt(dp->d_interleave, "il", 1); 123 getnumdflt(dp->d_trackskew, "sk", 0); 124 getnumdflt(dp->d_cylskew, "cs", 0); 125 getnumdflt(dp->d_headswitch, "hs", 0); 126 getnumdflt(dp->d_trkseek, "ts", 0); 127 getnumdflt(dp->d_bbsize, "bs", BBSIZE); 128 getnumdflt(dp->d_sbsize, "sb", SBSIZE); 129 strcpy(psize, "px"); 130 strcpy(pbsize, "bx"); 131 strcpy(pfsize, "fx"); 132 strcpy(poffset, "ox"); 133 strcpy(ptype, "tx"); 134 max = 'a' - 1; 135 pp = &dp->d_partitions[0]; 136 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) { 137 long f; 138 139 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; 140 if (cgetnum(buf, psize, &f) == -1) 141 pp->p_size = 0; 142 else { 143 pp->p_size = f; 144 getnum(pp->p_offset, poffset); 145 getnumdflt(pp->p_fsize, pfsize, 0); 146 if (pp->p_fsize) { 147 long bsize; 148 149 if (cgetnum(buf, pbsize, &bsize) == 0) 150 pp->p_frag = bsize / pp->p_fsize; 151 else 152 pp->p_frag = 8; 153 } 154 getnumdflt(pp->p_fstype, ptype, 0); 155 if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) 156 pp->p_fstype = gettype(cq, fstypenames); 157 max = p; 158 } 159 } 160 dp->d_npartitions = max + 1 - 'a'; 161 (void)strcpy(psize, "dx"); 162 dx = dp->d_drivedata; 163 for (p = '0'; p < '0' + NDDATA; p++, dx++) { 164 psize[1] = p; 165 getnumdflt(*dx, psize, 0); 166 } 167 dp->d_magic = DISKMAGIC; 168 dp->d_magic2 = DISKMAGIC; 169 free(buf); 170 return (dp); 171 } 172 173 static int 174 gettype(t, names) 175 char *t; 176 char **names; 177 { 178 register char **nm; 179 180 for (nm = names; *nm; nm++) 181 if (strcasecmp(t, *nm) == 0) 182 return (nm - names); 183 if (isdigit(*t)) 184 return (atoi(t)); 185 return (0); 186 } 187 188 static void 189 error(err) 190 int err; 191 { 192 char *p; 193 194 (void)write(STDERR_FILENO, "disktab: ", 9); 195 (void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1); 196 (void)write(STDERR_FILENO, ": ", 2); 197 p = strerror(err); 198 (void)write(STDERR_FILENO, p, strlen(p)); 199 (void)write(STDERR_FILENO, "\n", 1); 200 } 201
Indexes created Tue Sep 30 20:09:53 GMT 2025