Merge from vendor branch BZIP:
[dragonfly.git] / lib / libc / gen / disklabel.c
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1/*
2 * Copyright (c) 1983, 1987, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#)disklabel.c 8.2 (Berkeley) 5/3/95
34 * $FreeBSD: src/lib/libc/gen/disklabel.c,v 1.9.2.1 2001/03/05 08:40:47 obrien Exp $
b0e25abd 35 * $DragonFly: src/lib/libc/gen/disklabel.c,v 1.8 2005/11/19 22:32:53 swildner Exp $
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36 */
37
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38#include <sys/param.h>
39#define DKTYPENAMES
40#include <sys/disklabel.h>
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41#include <vfs/ufs/dinode.h>
42#include <vfs/ufs/fs.h>
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43
44#include <fcntl.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <unistd.h>
49#include <ctype.h>
50
89671a80 51static int gettype (const char *, const char **);
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52
53struct disklabel *
0f52d283 54getdiskbyname(const char *name)
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55{
56 static struct disklabel disk;
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57 struct disklabel *dp = &disk;
58 struct partition *pp;
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59 char *buf;
60 char *db_array[2] = { _PATH_DISKTAB, 0 };
61 char *cp, *cq; /* can't be register */
62 char p, max, psize[3], pbsize[3],
63 pfsize[3], poffset[3], ptype[3];
64 u_int32_t *dx;
65
b0e25abd 66 if (cgetent(&buf, db_array, (char *)name) < 0)
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67 return NULL;
68
69 bzero((char *)&disk, sizeof(disk));
70 /*
71 * typename
72 */
73 cq = dp->d_typename;
74 cp = buf;
75 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 &&
76 (*cq = *cp) && *cq != '|' && *cq != ':')
77 cq++, cp++;
78 *cq = '\0';
79 /*
80 * boot name (optional) xxboot, bootxx
81 */
82 cgetstr(buf, "b0", &dp->d_boot0);
83 cgetstr(buf, "b1", &dp->d_boot1);
84
85 if (cgetstr(buf, "ty", &cq) > 0 && 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 if (cgetcap(buf, "sf", ':') != NULL)
90 dp->d_flags |= D_BADSECT;
91
92#define getnumdflt(field, dname, dflt) \
93 { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; }
94
95 getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
96 getnumdflt(dp->d_ntracks, "nt", 0);
97 getnumdflt(dp->d_nsectors, "ns", 0);
98 getnumdflt(dp->d_ncylinders, "nc", 0);
99
100 if (cgetstr(buf, "dt", &cq) > 0)
101 dp->d_type = gettype(cq, dktypenames);
102 else
103 getnumdflt(dp->d_type, "dt", 0);
104 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks);
105 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders);
106 getnumdflt(dp->d_rpm, "rm", 3600);
107 getnumdflt(dp->d_interleave, "il", 1);
108 getnumdflt(dp->d_trackskew, "sk", 0);
109 getnumdflt(dp->d_cylskew, "cs", 0);
110 getnumdflt(dp->d_headswitch, "hs", 0);
111 getnumdflt(dp->d_trkseek, "ts", 0);
112 getnumdflt(dp->d_bbsize, "bs", BBSIZE);
113 getnumdflt(dp->d_sbsize, "sb", SBSIZE);
114 strcpy(psize, "px");
115 strcpy(pbsize, "bx");
116 strcpy(pfsize, "fx");
117 strcpy(poffset, "ox");
118 strcpy(ptype, "tx");
119 max = 'a' - 1;
120 pp = &dp->d_partitions[0];
121 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) {
122 long l;
123 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
124 if (cgetnum(buf, psize, &l) == -1)
125 pp->p_size = 0;
126 else {
127 pp->p_size = l;
128 cgetnum(buf, poffset, &l);
129 pp->p_offset = l;
130 getnumdflt(pp->p_fsize, pfsize, 0);
131 if (pp->p_fsize) {
132 long bsize;
133
134 if (cgetnum(buf, pbsize, &bsize) == 0)
135 pp->p_frag = bsize / pp->p_fsize;
136 else
137 pp->p_frag = 8;
138 }
139 getnumdflt(pp->p_fstype, ptype, 0);
140 if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0)
141 pp->p_fstype = gettype(cq, fstypenames);
142 max = p;
143 }
144 }
145 dp->d_npartitions = max + 1 - 'a';
0f52d283 146 strcpy(psize, "dx");
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147 dx = dp->d_drivedata;
148 for (p = '0'; p < '0' + NDDATA; p++, dx++) {
149 psize[1] = p;
150 getnumdflt(*dx, psize, 0);
151 }
152 dp->d_magic = DISKMAGIC;
153 dp->d_magic2 = DISKMAGIC;
154 free(buf);
155 return (dp);
156}
157
158static int
89671a80 159gettype(const char *t, const char **names)
984263bc 160{
89671a80 161 const char **nm;
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162
163 for (nm = names; *nm; nm++)
164 if (strcasecmp(t, *nm) == 0)
165 return (nm - names);
166 if (isdigit((unsigned char)*t))
167 return (atoi(t));
168 return (0);
169}