lib/libc/gen/disktab.c

   1 /*
   2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   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  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34 /*
  35  * Copyright (c) 1983, 1987, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  */
  62 /*
  63  * $DragonFly: src/lib/libc/gen/disktab.c,v 1.11 2007/06/17 23:50:13 dillon Exp $
  64  * @(#)disklabel.c     8.2 (Berkeley) 5/3/95
  65  * $FreeBSD: src/lib/libc/gen/disklabel.c,v 1.9.2.1 2001/03/05 08:40:47 obrien
  66  */
  67
  68 #include <sys/param.h>
  69 #define DKTYPENAMES
  70 #include <sys/disklabel.h>
  71 #include <sys/dtype.h>
  72 #include <vfs/ufs/dinode.h>
  73 #include <vfs/ufs/fs.h>
  74
  75 #include <ctype.h>
  76 #include <stdio.h>
  77 #include <stdlib.h>
  78 #include <stdarg.h>
  79 #include <unistd.h>
  80 #include <string.h>
  81 #include <disktab.h>
  82
  83 static int      gettype (const char *, const char **);
  84
  85 struct disktab *
  86 getdisktabbyname(const char *name)
  87 {
  88         static struct disktab dtab;
  89         struct disktab *dt = &dtab;
  90         struct dt_partition *pp;
  91         char    *buf;
  92         char    *db_array[2] = { _PATH_DISKTAB, 0 };
  93         char    *cp, *cq;       /* can't be register */
  94         char    p, max, psize[3], pbsize[3],
  95                 pfsize[3], poffset[3], ptype[3];
  96 #if 0
  97         u_int32_t *dx;
  98 #endif
  99
 100         if (cgetent(&buf, db_array, (char *)name) < 0)
 101                 return NULL;
 102
 103         bzero(dt, sizeof(*dt));
 104         /*
 105          * typename
 106          */
 107         cq = dt->d_typename;
 108         cp = buf;
 109         while (cq < dt->d_typename + sizeof(dt->d_typename) - 1 &&
 110             (*cq = *cp) && *cq != '|' && *cq != ':')
 111                 cq++, cp++;
 112         *cq = '\0';
 113
 114 #define getnumdflt(field, dname, dflt) \
 115         { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; }
 116
 117         getnumdflt(dt->d_media_blksize, "se", DEV_BSIZE);
 118         getnumdflt(dt->d_nheads, "nt", 0);
 119         getnumdflt(dt->d_secpertrack, "ns", 0);
 120         getnumdflt(dt->d_ncylinders, "nc", 0);
 121
 122         if (cgetstr(buf, "dt", &cq) > 0)
 123                 dt->d_typeid = gettype(cq, dktypenames);
 124         else
 125                 getnumdflt(dt->d_typeid, "dt", 0);
 126         getnumdflt(dt->d_secpercyl, "sc", dt->d_secpertrack * dt->d_nheads);
 127         getnumdflt(dt->d_media_blocks, "su", dt->d_secpercyl * dt->d_ncylinders);
 128         getnumdflt(dt->d_rpm, "rm", 3600);
 129         getnumdflt(dt->d_interleave, "il", 1);
 130         getnumdflt(dt->d_trackskew, "sk", 0);
 131         getnumdflt(dt->d_cylskew, "cs", 0);
 132         getnumdflt(dt->d_headswitch, "hs", 0);
 133         getnumdflt(dt->d_trkseek, "ts", 0);
 134         getnumdflt(dt->d_bbsize, "bs", BBSIZE);
 135         getnumdflt(dt->d_sbsize, "sb", SBSIZE);
 136         strcpy(psize, "px");
 137         strcpy(pbsize, "bx");
 138         strcpy(pfsize, "fx");
 139         strcpy(poffset, "ox");
 140         strcpy(ptype, "tx");
 141         max = 'a' - 1;
 142         pp = &dt->d_partitions[0];
 143         for (p = 'a'; p < 'a' + MAXDTPARTITIONS; p++, pp++) {
 144                 long l;
 145                 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
 146                 if (cgetnum(buf, psize, &l) == -1) {
 147                         pp->p_size = 0;
 148                 } else {
 149                         pp->p_size = l;
 150                         cgetnum(buf, poffset, &l);
 151                         pp->p_offset = l;
 152                         getnumdflt(pp->p_fsize, pfsize, 0);
 153                         if (pp->p_fsize) {
 154                                 long bsize;
 155
 156                                 if (cgetnum(buf, pbsize, &bsize) == 0)
 157                                         pp->p_frag = bsize / pp->p_fsize;
 158                                 else
 159                                         pp->p_frag = 8;
 160                         }
 161                         getnumdflt(pp->p_fstype, ptype, 0);
 162                         if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) {
 163                                 pp->p_fstype = gettype(cq, fstypenames);
 164                                 snprintf(pp->p_fstypestr,
 165                                          sizeof(pp->p_fstypestr), "%s", cq);
 166                         } else if (pp->p_fstype >= 0 &&
 167                                    pp->p_fstype < FSMAXTYPES) {
 168                                 snprintf(pp->p_fstypestr,
 169                                          sizeof(pp->p_fstypestr), "%s",
 170                                          fstypenames[pp->p_fstype]);
 171                         }
 172                         max = p;
 173                 }
 174         }
 175         dt->d_npartitions = max + 1 - 'a';
 176 #if 0
 177         strcpy(psize, "dx");
 178         dx = dt->d_drivedata;
 179         for (p = '0'; p < '0' + NDDATA; p++, dx++) {
 180                 psize[1] = p;
 181                 getnumdflt(*dx, psize, 0);
 182         }
 183         dp->d_magic = DISKMAGIC;
 184         dp->d_magic2 = DISKMAGIC;
 185 #endif
 186         free(buf);
 187         return (dt);
 188 }
 189
 190 static int
 191 gettype(const char *t, const char **names)
 192 {
 193         const char **nm;
 194
 195         for (nm = names; *nm; nm++)
 196                 if (strcasecmp(t, *nm) == 0)
 197                         return (nm - names);
 198         if (isdigit((unsigned char)*t))
 199                 return (atoi(t));
 200         return (0);
 201 }