2 * Copyright (c) 1983, 1987, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #if defined(LIBC_SCCS) && !defined(lint)
31 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 5/3/95";
32 #endif /* LIBC_SCCS and not lint */
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
39 #include <sys/disklabel.h>
49 gettype(char *t, const char **names)
53 for (nm = names; *nm; nm++)
54 if (strcasecmp(t, *nm) == 0)
56 if (isdigit((unsigned char)*t))
62 getdiskbyname(const char *name)
64 static struct disklabel disk;
65 struct disklabel *dp = &disk;
68 char *db_array[2] = { _PATH_DISKTAB, 0 };
69 char *cp, *cq; /* can't be register */
70 char p, max, psize[3], pbsize[3],
71 pfsize[3], poffset[3], ptype[3];
74 if (cgetent(&buf, db_array, (char *) name) < 0)
77 bzero((char *)&disk, sizeof(disk));
83 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 &&
84 (*cq = *cp) && *cq != '|' && *cq != ':')
88 if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0)
89 dp->d_flags |= D_REMOVABLE;
90 else if (cq && strcmp(cq, "simulated") == 0)
91 dp->d_flags |= D_RAMDISK;
92 if (cgetcap(buf, "sf", ':') != NULL)
93 dp->d_flags |= D_BADSECT;
95 #define getnumdflt(field, dname, dflt) \
96 { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; }
98 getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
99 getnumdflt(dp->d_ntracks, "nt", 0);
100 getnumdflt(dp->d_nsectors, "ns", 0);
101 getnumdflt(dp->d_ncylinders, "nc", 0);
103 if (cgetstr(buf, "dt", &cq) > 0)
104 dp->d_type = gettype(cq, dktypenames);
106 getnumdflt(dp->d_type, "dt", 0);
107 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks);
108 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders);
109 getnumdflt(dp->d_rpm, "rm", 3600);
110 getnumdflt(dp->d_interleave, "il", 1);
111 getnumdflt(dp->d_trackskew, "sk", 0);
112 getnumdflt(dp->d_cylskew, "cs", 0);
113 getnumdflt(dp->d_headswitch, "hs", 0);
114 getnumdflt(dp->d_trkseek, "ts", 0);
115 getnumdflt(dp->d_bbsize, "bs", BBSIZE);
116 getnumdflt(dp->d_sbsize, "sb", 0);
118 strcpy(pbsize, "bx");
119 strcpy(pfsize, "fx");
120 strcpy(poffset, "ox");
123 pp = &dp->d_partitions[0];
124 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) {
126 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
127 if (cgetnum(buf, psize, &l) == -1)
131 cgetnum(buf, poffset, &l);
133 getnumdflt(pp->p_fsize, pfsize, 0);
137 if (cgetnum(buf, pbsize, &bsize) == 0)
138 pp->p_frag = bsize / pp->p_fsize;
142 getnumdflt(pp->p_fstype, ptype, 0);
143 if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0)
144 pp->p_fstype = gettype(cq, fstypenames);
148 dp->d_npartitions = max + 1 - 'a';
149 (void)strcpy(psize, "dx");
150 dx = dp->d_drivedata;
151 for (p = '0'; p < '0' + NDDATA; p++, dx++) {
153 getnumdflt(*dx, psize, 0);
155 dp->d_magic = DISKMAGIC;
156 dp->d_magic2 = DISKMAGIC;