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. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgement:
  48  *      This product includes software developed by the University of
  49  *      California, Berkeley and its contributors.
  50  * 4. Neither the name of the University nor the names of its contributors
  51  *    may be used to endorse or promote products derived from this software
  52  *    without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64  * SUCH DAMAGE.
  65  */
  66 /*
  67  * $DragonFly: src/lib/libc/gen/disktab.c,v 1.11 2007/06/17 23:50:13 dillon Exp $
  68  * @(#)disklabel.c     8.2 (Berkeley) 5/3/95
  69  * $FreeBSD: src/lib/libc/gen/disklabel.c,v 1.9.2.1 2001/03/05 08:40:47 obrien
  70  */
  71
  72 #include <sys/param.h>
  73 #define DKTYPENAMES
  74 #include <sys/disklabel.h>
  75 #include <sys/dtype.h>
  76 #include <vfs/ufs/dinode.h>
  77 #include <vfs/ufs/fs.h>
  78
  79 #include <stdio.h>
  80 #include <stdlib.h>
  81 #include <stdarg.h>
  82 #include <unistd.h>
  83 #include <string.h>
  84 #include <disktab.h>
  85
  86 static int      gettype (const char *, const char **);
  87
  88 struct disktab *
  89 getdisktabbyname(const char *name)
  90 {
  91         static struct disktab dtab;
  92         struct disktab *dt = &dtab;
  93         struct dt_partition *pp;
  94         char    *buf;
  95         char    *db_array[2] = { _PATH_DISKTAB, 0 };
  96         char    *cp, *cq;       /* can't be register */
  97         char    p, max, psize[3], pbsize[3],
  98                 pfsize[3], poffset[3], ptype[3];
  99         u_int32_t *dx;
 100
 101         if (cgetent(&buf, db_array, (char *)name) < 0)
 102                 return NULL;
 103
 104         bzero(dt, sizeof(*dt));
 105         /*
 106          * typename
 107          */
 108         cq = dt->d_typename;
 109         cp = buf;
 110         while (cq < dt->d_typename + sizeof(dt->d_typename) - 1 &&
 111             (*cq = *cp) && *cq != '|' && *cq != ':')
 112                 cq++, cp++;
 113         *cq = '\0';
 114
 115 #define getnumdflt(field, dname, dflt) \
 116         { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; }
 117
 118         getnumdflt(dt->d_media_blksize, "se", DEV_BSIZE);
 119         getnumdflt(dt->d_nheads, "nt", 0);
 120         getnumdflt(dt->d_secpertrack, "ns", 0);
 121         getnumdflt(dt->d_ncylinders, "nc", 0);
 122
 123         if (cgetstr(buf, "dt", &cq) > 0)
 124                 dt->d_typeid = gettype(cq, dktypenames);
 125         else
 126                 getnumdflt(dt->d_typeid, "dt", 0);
 127         getnumdflt(dt->d_secpercyl, "sc", dt->d_secpertrack * dt->d_nheads);
 128         getnumdflt(dt->d_media_blocks, "su", dt->d_secpercyl * dt->d_ncylinders);
 129         getnumdflt(dt->d_rpm, "rm", 3600);
 130         getnumdflt(dt->d_interleave, "il", 1);
 131         getnumdflt(dt->d_trackskew, "sk", 0);
 132         getnumdflt(dt->d_cylskew, "cs", 0);
 133         getnumdflt(dt->d_headswitch, "hs", 0);
 134         getnumdflt(dt->d_trkseek, "ts", 0);
 135         getnumdflt(dt->d_bbsize, "bs", BBSIZE);
 136         getnumdflt(dt->d_sbsize, "sb", SBSIZE);
 137         strcpy(psize, "px");
 138         strcpy(pbsize, "bx");
 139         strcpy(pfsize, "fx");
 140         strcpy(poffset, "ox");
 141         strcpy(ptype, "tx");
 142         max = 'a' - 1;
 143         pp = &dt->d_partitions[0];
 144         for (p = 'a'; p < 'a' + MAXDTPARTITIONS; p++, pp++) {
 145                 long l;
 146                 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
 147                 if (cgetnum(buf, psize, &l) == -1) {
 148                         pp->p_size = 0;
 149                 } else {
 150                         pp->p_size = l;
 151                         cgetnum(buf, poffset, &l);
 152                         pp->p_offset = l;
 153                         getnumdflt(pp->p_fsize, pfsize, 0);
 154                         if (pp->p_fsize) {
 155                                 long bsize;
 156
 157                                 if (cgetnum(buf, pbsize, &bsize) == 0)
 158                                         pp->p_frag = bsize / pp->p_fsize;
 159                                 else
 160                                         pp->p_frag = 8;
 161                         }
 162                         getnumdflt(pp->p_fstype, ptype, 0);
 163                         if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0) {
 164                                 pp->p_fstype = gettype(cq, fstypenames);
 165                                 snprintf(pp->p_fstypestr,
 166                                          sizeof(pp->p_fstypestr), "%s", cq);
 167                         } else if (pp->p_fstype >= 0 &&
 168                                    pp->p_fstype < FSMAXTYPES) {
 169                                 snprintf(pp->p_fstypestr,
 170                                          sizeof(pp->p_fstypestr), "%s",
 171                                          fstypenames[pp->p_fstype]);
 172                         }
 173                         max = p;
 174                 }
 175         }
 176         dt->d_npartitions = max + 1 - 'a';
 177 #if 0
 178         strcpy(psize, "dx");
 179         dx = dt->d_drivedata;
 180         for (p = '0'; p < '0' + NDDATA; p++, dx++) {
 181                 psize[1] = p;
 182                 getnumdflt(*dx, psize, 0);
 183         }
 184         dp->d_magic = DISKMAGIC;
 185         dp->d_magic2 = DISKMAGIC;
 186 #endif
 187         free(buf);
 188         return (dt);
 189 }
 190
 191 static int
 192 gettype(const char *t, const char **names)
 193 {
 194         const char **nm;
 195
 196         for (nm = names; *nm; nm++)
 197                 if (strcasecmp(t, *nm) == 0)
 198                         return (nm - names);
 199         if (isdigit((unsigned char)*t))
 200                 return (atoi(t));
 201         return (0);
 202 }