disklabel.c revision 39684
1100384Speter/*
2100384Speter * Copyright (c) 1983, 1987, 1993
3100384Speter *	The Regents of the University of California.  All rights reserved.
4100384Speter *
5100384Speter * Redistribution and use in source and binary forms, with or without
6100384Speter * modification, are permitted provided that the following conditions
7100384Speter * are met:
8100384Speter * 1. Redistributions of source code must retain the above copyright
9100384Speter *    notice, this list of conditions and the following disclaimer.
10100384Speter * 2. Redistributions in binary form must reproduce the above copyright
11100384Speter *    notice, this list of conditions and the following disclaimer in the
12100384Speter *    documentation and/or other materials provided with the distribution.
13100384Speter * 3. All advertising materials mentioning features or use of this software
14100384Speter *    must display the following acknowledgement:
15100384Speter *	This product includes software developed by the University of
16100384Speter *	California, Berkeley and its contributors.
17100384Speter * 4. Neither the name of the University nor the names of its contributors
18100384Speter *    may be used to endorse or promote products derived from this software
19100384Speter *    without specific prior written permission.
20100384Speter *
21100384Speter * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22100384Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23100384Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24100384Speter * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25100384Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26100384Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27118031Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28118031Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29118031Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30104738Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31104738Speter * SUCH DAMAGE.
32100384Speter */
33100384Speter
34100384Speter#ifndef lint
35162954Sphk#if 0
36100384Speterstatic char sccsid[] = "@(#)disklabel.c	8.2 (Berkeley) 5/3/95";
37100384Speter#endif
38100384Speterstatic const char rcsid[] =
39123746Speter	"$Id: disklabel.c,v 1.6 1997/03/11 11:52:25 peter Exp $";
40100384Speter#endif /* not lint */
41100384Speter
42161343Sjkim#include <sys/param.h>
43100384Speter#define DKTYPENAMES
44100384Speter#include <sys/disklabel.h>
45100384Speter#include <ufs/ufs/dinode.h>
46151909Sps#include <ufs/ffs/fs.h>
47100384Speter
48100384Speter#include <errno.h>
49100384Speter#include <fcntl.h>
50100384Speter#include <stdio.h>
51100384Speter#include <stdlib.h>
52100384Speter#include <string.h>
53100384Speter#include <unistd.h>
54100384Speter#include <ctype.h>
55100384Speter
56146950Spsstatic int	gettype __P((char *, char **));
57100384Speter
58100384Speterstruct disklabel *
59100384Spetergetdiskbyname(name)
60100384Speter	const char *name;
61100384Speter{
62100384Speter	static struct	disklabel disk;
63150883Sjhb	register struct	disklabel *dp = &disk;
64113859Sjhb	register struct partition *pp;
65100384Speter	char	*buf;
66100384Speter	char  	*db_array[2] = { _PATH_DISKTAB, 0 };
67100384Speter	char	*cp, *cq;	/* can't be register */
68162551Sdavidxu	char	p, max, psize[3], pbsize[3],
69100384Speter		pfsize[3], poffset[3], ptype[3];
70162551Sdavidxu	u_int32_t *dx;
71100384Speter
72127140Sjhb	if (cgetent(&buf, db_array, (char *) name) < 0)
73157285Sps		return NULL;
74174381Sjhb
75174381Sjhb	bzero((char *)&disk, sizeof(disk));
76157285Sps	/*
77100384Speter	 * typename
78100384Speter	 */
79100384Speter	cq = dp->d_typename;
80100384Speter	cp = buf;
81100384Speter	while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 &&
82100384Speter	    (*cq = *cp) && *cq != '|' && *cq != ':')
83100384Speter		cq++, cp++;
84100384Speter	*cq = '\0';
85100384Speter	/*
86151582Sps	 * boot name (optional)  xxboot, bootxx
87151582Sps	 */
88119333Speter	cgetstr(buf, "b0", &dp->d_boot0);
89119333Speter	cgetstr(buf, "b1", &dp->d_boot1);
90174380Sjhb
91163018Sdavidxu	if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0)
92119333Speter		dp->d_flags |= D_REMOVABLE;
93100384Speter	else  if (cq && strcmp(cq, "simulated") == 0)
94121719Speter		dp->d_flags |= D_RAMDISK;
95121719Speter	if (cgetcap(buf, "sf", ':') != NULL)
96174377Sjhb		dp->d_flags |= D_BADSECT;
97121719Speter
98121719Speter#define getnumdflt(field, dname, dflt) \
99174377Sjhb        { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; }
100174377Sjhb
101174377Sjhb	getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
102174377Sjhb	getnumdflt(dp->d_ntracks, "nt", 0);
103174377Sjhb	getnumdflt(dp->d_nsectors, "ns", 0);
104174377Sjhb	getnumdflt(dp->d_ncylinders, "nc", 0);
105121719Speter
106174377Sjhb	if (cgetstr(buf, "dt", &cq) > 0)
107174377Sjhb		dp->d_type = gettype(cq, dktypenames);
108174377Sjhb	else
109100384Speter		getnumdflt(dp->d_type, "dt", 0);
110119333Speter	getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks);
111100384Speter	getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders);
112127140Sjhb	getnumdflt(dp->d_rpm, "rm", 3600);
113127140Sjhb	getnumdflt(dp->d_interleave, "il", 1);
114136152Sjhb	getnumdflt(dp->d_trackskew, "sk", 0);
115100384Speter	getnumdflt(dp->d_cylskew, "cs", 0);
116136152Sjhb	getnumdflt(dp->d_headswitch, "hs", 0);
117136152Sjhb	getnumdflt(dp->d_trkseek, "ts", 0);
118136152Sjhb	getnumdflt(dp->d_bbsize, "bs", BBSIZE);
119136152Sjhb	getnumdflt(dp->d_sbsize, "sb", SBSIZE);
120136152Sjhb	strcpy(psize, "px");
121100384Speter	strcpy(pbsize, "bx");
122100384Speter	strcpy(pfsize, "fx");
123127140Sjhb	strcpy(poffset, "ox");
124127140Sjhb	strcpy(ptype, "tx");
125127140Sjhb	max = 'a' - 1;
126100384Speter	pp = &dp->d_partitions[0];
127100384Speter	for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) {
128100384Speter		long l;
129100384Speter		psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
130100384Speter		if (cgetnum(buf, psize, &l) == -1)
131100384Speter			pp->p_size = 0;
132100384Speter		else {
133100384Speter			pp->p_size = l;
134100384Speter			cgetnum(buf, poffset, &l);
135100384Speter			pp->p_offset = l;
136100384Speter			getnumdflt(pp->p_fsize, pfsize, 0);
137100384Speter			if (pp->p_fsize) {
138100384Speter				long bsize;
139100384Speter
140100384Speter				if (cgetnum(buf, pbsize, &bsize) == 0)
141100384Speter					pp->p_frag = bsize / pp->p_fsize;
142127140Sjhb				else
143100384Speter					pp->p_frag = 8;
144100384Speter			}
145100384Speter			getnumdflt(pp->p_fstype, ptype, 0);
146100384Speter			if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0)
147128597Smarcel				pp->p_fstype = gettype(cq, fstypenames);
148174526Sjhb			max = p;
149100384Speter		}
150100384Speter	}
151172003Sjhb	dp->d_npartitions = max + 1 - 'a';
152174424Sscottl	(void)strcpy(psize, "dx");
153156266Sps	dx = dp->d_drivedata;
154100384Speter	for (p = '0'; p < '0' + NDDATA; p++, dx++) {
155172003Sjhb		psize[1] = p;
156100384Speter		getnumdflt(*dx, psize, 0);
157100384Speter	}
158100384Speter	dp->d_magic = DISKMAGIC;
159172003Sjhb	dp->d_magic2 = DISKMAGIC;
160174526Sjhb	free(buf);
161100384Speter	return (dp);
162100384Speter}
163100384Speter
164100384Speterstatic int
165174526Sjhbgettype(t, names)
166174526Sjhb	char *t;
167156266Sps	char **names;
168156266Sps{
169156266Sps	register char **nm;
170156266Sps
171174526Sjhb	for (nm = names; *nm; nm++)
172174526Sjhb		if (strcasecmp(t, *nm) == 0)
173156266Sps			return (nm - names);
174156266Sps	if (isdigit(*t))
175100384Speter		return (atoi(t));
176128597Smarcel	return (0);
177100384Speter}
178128597Smarcel