gen/disklabel.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1983, 1987, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58
  59 #include <sys/param.h>
  60 #include <sys/time.h>
  61 #define DKTYPENAMES
  62 #include <sys/disklabel.h>
  63 #include <ufs/ufs/dinode.h>
  64 #include <ufs/ffs/fs.h>
  65
  66 #include <errno.h>
  67 #include <fcntl.h>
  68 #include <stdio.h>
  69 #include <stdlib.h>
  70 #include <string.h>
  71 #include <unistd.h>
  72 #include <ctype.h>
  73
  74 #ifdef unused
  75 static int      error(int);
  76 #endif // unused
  77 static int      gettype(char *, char **);
  78
  79 struct disklabel *
  80 getdiskbyname(name)
  81         const char *name;
  82 {
  83         static struct   disklabel disk;
  84         register struct disklabel *dp = &disk;
  85         register struct partition *pp;
  86         char    *buf;
  87         char    *db_array[2] = { _PATH_DISKTAB, 0 };
  88         char    *cp, *cq;       /* can't be register */
  89         char    p, max, psize[3], pbsize[3],
  90                 pfsize[3], poffset[3], ptype[3];
  91         u_int32_t *dx;
  92
  93         if (cgetent(&buf, db_array, (char *) name) < 0)
  94                 return NULL;
  95
  96         bzero((char *)&disk, sizeof(disk));
  97         /*
  98          * typename
  99          */
 100         cq = dp->d_typename;
 101         cp = buf;
 102         while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 &&
 103             (*cq = *cp) && *cq != '|' && *cq != ':')
 104                 cq++, cp++;
 105         *cq = '\0';
 106         /*
 107          * boot name (optional)  xxboot, bootxx
 108          */
 109         cgetstr(buf, "b0", &dp->d_boot0);
 110         cgetstr(buf, "b1", &dp->d_boot1);
 111
 112         if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0)
 113                 dp->d_flags |= D_REMOVABLE;
 114         else  if (cq && strcmp(cq, "simulated") == 0)
 115                 dp->d_flags |= D_RAMDISK;
 116         if (cgetcap(buf, "sf", ':') != NULL)
 117                 dp->d_flags |= D_BADSECT;
 118
 119 #define getnumdflt(field, dname, dflt) \
 120         { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; }
 121
 122         getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
 123         cgetnum(buf, "nt",(long *) &dp->d_ntracks);
 124         cgetnum(buf, "ns",(long *) &dp->d_nsectors);
 125         cgetnum(buf, "nc",(long *) &dp->d_ncylinders);
 126
 127         if (cgetstr(buf, "dt", &cq) > 0)
 128                 dp->d_type = gettype(cq, dktypenames);
 129         else
 130                 getnumdflt(dp->d_type, "dt", 0);
 131         getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks);
 132         getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders);
 133         getnumdflt(dp->d_rpm, "rm", 3600);
 134         getnumdflt(dp->d_interleave, "il", 1);
 135         getnumdflt(dp->d_trackskew, "sk", 0);
 136         getnumdflt(dp->d_cylskew, "cs", 0);
 137         getnumdflt(dp->d_headswitch, "hs", 0);
 138         getnumdflt(dp->d_trkseek, "ts", 0);
 139         getnumdflt(dp->d_bbsize, "bs", BBSIZE);
 140         getnumdflt(dp->d_sbsize, "sb", SBSIZE);
 141         strcpy(psize, "px");
 142         strcpy(pbsize, "bx");
 143         strcpy(pfsize, "fx");
 144         strcpy(poffset, "ox");
 145         strcpy(ptype, "tx");
 146         max = 'a' - 1;
 147         pp = &dp->d_partitions[0];
 148         for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) {
 149                 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
 150                 if (cgetnum(buf, psize,(long *) &pp->p_size) == -1)
 151                         pp->p_size = 0;
 152                 else {
 153                         cgetnum(buf, poffset, (long *) &pp->p_offset);
 154                         getnumdflt(pp->p_fsize, pfsize, 0);
 155                         if (pp->p_fsize) {
 156                                 long bsize;
 157
 158                                 if (cgetnum(buf, pbsize, &bsize) == 0)
 159                                         pp->p_frag = bsize / pp->p_fsize;
 160                                 else
 161                                         pp->p_frag = 8;
 162                         }
 163                         getnumdflt(pp->p_fstype, ptype, 0);
 164                         if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0)
 165                                 pp->p_fstype = gettype(cq, fstypenames);
 166                         max = p;
 167                 }
 168         }
 169         dp->d_npartitions = max + 1 - 'a';
 170         (void)strcpy(psize, "dx");
 171         dx = dp->d_drivedata;
 172         for (p = '0'; p < '0' + NDDATA; p++, dx++) {
 173                 psize[1] = p;
 174                 getnumdflt(*dx, psize, 0);
 175         }
 176         dp->d_magic = DISKMAGIC;
 177         dp->d_magic2 = DISKMAGIC;
 178         free(buf);
 179         return (dp);
 180 }
 181
 182 static int
 183 gettype(t, names)
 184         char *t;
 185         char **names;
 186 {
 187         register char **nm;
 188
 189         for (nm = names; *nm; nm++)
 190                 if (strcasecmp(t, *nm) == 0)
 191                         return (nm - names);
 192         if (isdigit(*t))
 193                 return (atoi(t));
 194         return (0);
 195 }
 196
 197 #ifdef unused
 198 static int
 199 error(err)
 200         int err;
 201 {
 202         char *p;
 203
 204         (void)write(STDERR_FILENO, "disktab: ", 9);
 205         (void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1);
 206         (void)write(STDERR_FILENO, ": ", 2);
 207         p = strerror(err);
 208         (void)write(STDERR_FILENO, p, strlen(p));
 209         (void)write(STDERR_FILENO, "\n", 1);
 210 }
 211 #endif // unused