1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #define DKTYPENAMES 34 #define FSTYPENAMES 35 #include <sys/disklabel.h> 36 37 #include <fcntl.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 #include <ctype.h> 43 44 static int 45 gettype(char *t, const char **names) 46 { 47 const char **nm; 48 49 for (nm = names; *nm; nm++) 50 if (strcasecmp(t, *nm) == 0) 51 return (nm - names); 52 if (isdigit((unsigned char)*t)) 53 return (atoi(t)); 54 return (0); 55 } 56 57 struct disklabel * 58 getdiskbyname(const char *name) 59 { 60 static struct disklabel disk; 61 struct disklabel *dp = &disk; 62 struct partition *pp; 63 char *buf; 64 char *db_array[2] = { _PATH_DISKTAB, 0 }; 65 char *cp, *cq; /* can't be register */ 66 char p, max, psize[3], pbsize[3], 67 pfsize[3], poffset[3], ptype[3]; 68 u_int32_t *dx; 69 70 if (cgetent(&buf, db_array, (char *) name) < 0) 71 return NULL; 72 73 bzero((char *)&disk, sizeof(disk)); 74 /* 75 * typename 76 */ 77 cq = dp->d_typename; 78 cp = buf; 79 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 && 80 (*cq = *cp) && *cq != '|' && *cq != ':') 81 cq++, cp++; 82 *cq = '\0'; 83 84 if (cgetstr(buf, "ty", &cq) > 0) { 85 if (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 free(cq); 90 } 91 if (cgetcap(buf, "sf", ':') != NULL) 92 dp->d_flags |= D_BADSECT; 93 94 #define getnumdflt(field, dname, dflt) \ 95 { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; } 96 97 getnumdflt(dp->d_secsize, "se", DEV_BSIZE); 98 getnumdflt(dp->d_ntracks, "nt", 0); 99 getnumdflt(dp->d_nsectors, "ns", 0); 100 getnumdflt(dp->d_ncylinders, "nc", 0); 101 102 if (cgetstr(buf, "dt", &cq) > 0) { 103 dp->d_type = gettype(cq, dktypenames); 104 free(cq); 105 } else 106 getnumdflt(dp->d_type, "dt", 0); 107 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks); 108 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders); 109 getnumdflt(dp->d_rpm, "rm", 3600); 110 getnumdflt(dp->d_interleave, "il", 1); 111 getnumdflt(dp->d_trackskew, "sk", 0); 112 getnumdflt(dp->d_cylskew, "cs", 0); 113 getnumdflt(dp->d_headswitch, "hs", 0); 114 getnumdflt(dp->d_trkseek, "ts", 0); 115 getnumdflt(dp->d_bbsize, "bs", BBSIZE); 116 getnumdflt(dp->d_sbsize, "sb", 0); 117 strcpy(psize, "px"); 118 strcpy(pbsize, "bx"); 119 strcpy(pfsize, "fx"); 120 strcpy(poffset, "ox"); 121 strcpy(ptype, "tx"); 122 max = 'a' - 1; 123 pp = &dp->d_partitions[0]; 124 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) { 125 long l; 126 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p; 127 if (cgetnum(buf, psize, &l) == -1) 128 pp->p_size = 0; 129 else { 130 pp->p_size = l; 131 cgetnum(buf, poffset, &l); 132 pp->p_offset = l; 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) 144 if (cgetstr(buf, ptype, &cq) >= 0) { 145 pp->p_fstype = gettype(cq, fstypenames); 146 free(cq); 147 } 148 max = p; 149 } 150 } 151 dp->d_npartitions = max + 1 - 'a'; 152 (void)strcpy(psize, "dx"); 153 dx = dp->d_drivedata; 154 for (p = '0'; p < '0' + NDDATA; p++, dx++) { 155 psize[1] = p; 156 getnumdflt(*dx, psize, 0); 157 } 158 dp->d_magic = DISKMAGIC; 159 dp->d_magic2 = DISKMAGIC; 160 free(buf); 161 return (dp); 162 } 163