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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 $
35 * $DragonFly: src/lib/libc/gen/disklabel.c,v 1.9 2007/05/14 20:02:41 dillon Exp $
38 #include <sys/param.h>
40 #include <sys/disklabel.h>
41 #include <vfs/ufs/dinode.h>
42 #include <vfs/ufs/fs.h>
51 static int gettype (const char *, const char **);
54 getdiskbyname(const char *name)
56 static struct disklabel disk;
57 struct disklabel *dp = &disk;
60 char *db_array[2] = { 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];
66 if (cgetent(&buf, db_array, (char *)name) < 0)
69 bzero((char *)&disk, sizeof(disk));
75 while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 &&
76 (*cq = *cp) && *cq != '|' && *cq != ':')
80 * boot name (optional) xxboot, bootxx
82 cgetstr(buf, "b0", &dp->d_boot0);
83 cgetstr(buf, "b1", &dp->d_boot1);
85 #define getnumdflt(field, dname, dflt) \
86 { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; }
88 getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
89 getnumdflt(dp->d_ntracks, "nt", 0);
90 getnumdflt(dp->d_nsectors, "ns", 0);
91 getnumdflt(dp->d_ncylinders, "nc", 0);
93 if (cgetstr(buf, "dt", &cq) > 0)
94 dp->d_type = gettype(cq, dktypenames);
96 getnumdflt(dp->d_type, "dt", 0);
97 getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks);
98 getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders);
99 getnumdflt(dp->d_rpm, "rm", 3600);
100 getnumdflt(dp->d_interleave, "il", 1);
101 getnumdflt(dp->d_trackskew, "sk", 0);
102 getnumdflt(dp->d_cylskew, "cs", 0);
103 getnumdflt(dp->d_headswitch, "hs", 0);
104 getnumdflt(dp->d_trkseek, "ts", 0);
105 getnumdflt(dp->d_bbsize, "bs", BBSIZE);
106 getnumdflt(dp->d_sbsize, "sb", SBSIZE);
108 strcpy(pbsize, "bx");
109 strcpy(pfsize, "fx");
110 strcpy(poffset, "ox");
113 pp = &dp->d_partitions[0];
114 for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) {
116 psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
117 if (cgetnum(buf, psize, &l) == -1)
121 cgetnum(buf, poffset, &l);
123 getnumdflt(pp->p_fsize, pfsize, 0);
127 if (cgetnum(buf, pbsize, &bsize) == 0)
128 pp->p_frag = bsize / pp->p_fsize;
132 getnumdflt(pp->p_fstype, ptype, 0);
133 if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0)
134 pp->p_fstype = gettype(cq, fstypenames);
138 dp->d_npartitions = max + 1 - 'a';
140 dx = dp->d_drivedata;
141 for (p = '0'; p < '0' + NDDATA; p++, dx++) {
143 getnumdflt(*dx, psize, 0);
145 dp->d_magic = DISKMAGIC;
146 dp->d_magic2 = DISKMAGIC;
152 gettype(const char *t, const char **names)
156 for (nm = names; *nm; nm++)
157 if (strcasecmp(t, *nm) == 0)
159 if (isdigit((unsigned char)*t))