11e80345cSdist /*
2bac379f5Sbostic * Copyright (c) 1983, 1987, 1993
3bac379f5Sbostic * The Regents of the University of California. All rights reserved.
4da55c904Sbostic *
513734851Selan * %sccs.include.redist.c%
61e80345cSdist */
71e80345cSdist
813734851Selan #ifndef lint
9*b8ef49fdSmckusick static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 05/03/95";
1013734851Selan #endif /* not lint */
119876a848Ssam
1272f9a726Skarels #include <sys/param.h>
1372f9a726Skarels #define DKTYPENAMES
1472f9a726Skarels #include <sys/disklabel.h>
15*b8ef49fdSmckusick #include <ufs/ufs/dinode.h>
16ec9487d9Sbostic #include <ufs/ffs/fs.h>
17617c7e46Sbostic
18617c7e46Sbostic #include <errno.h>
19617c7e46Sbostic #include <fcntl.h>
209876a848Ssam #include <stdio.h>
21ae227ee3Sdonn #include <stdlib.h>
22617c7e46Sbostic #include <string.h>
23ae227ee3Sdonn #include <unistd.h>
249876a848Ssam
257dd1926fSelan static int error __P((int));
267dd1926fSelan static int gettype __P((char *, char **));
279876a848Ssam
2872f9a726Skarels struct disklabel *
getdiskbyname(name)299876a848Ssam getdiskbyname(name)
30ae227ee3Sdonn const char *name;
319876a848Ssam {
3272f9a726Skarels static struct disklabel disk;
3372f9a726Skarels register struct disklabel *dp = &disk;
34ef743ec4Ssam register struct partition *pp;
357dd1926fSelan char *buf;
367dd1926fSelan char *db_array[2] = { _PATH_DISKTAB, 0 };
377dd1926fSelan char *cp, *cq; /* can't be register */
38af6dc062Smarc char p, max, psize[3], pbsize[3],
39af6dc062Smarc pfsize[3], poffset[3], ptype[3];
40*b8ef49fdSmckusick u_int32_t *dx;
419876a848Ssam
427dd1926fSelan if (cgetent(&buf, db_array, (char *) name) < 0)
437dd1926fSelan return NULL;
447dd1926fSelan
4572f9a726Skarels bzero((char *)&disk, sizeof(disk));
46af6dc062Smarc /*
47af6dc062Smarc * typename
48af6dc062Smarc */
4972f9a726Skarels cq = dp->d_typename;
5072f9a726Skarels cp = buf;
5172f9a726Skarels while (cq < dp->d_typename + sizeof(dp->d_typename) - 1 &&
5272f9a726Skarels (*cq = *cp) && *cq != '|' && *cq != ':')
5372f9a726Skarels cq++, cp++;
5472f9a726Skarels *cq = '\0';
55af6dc062Smarc /*
56af6dc062Smarc * boot name (optional) xxboot, bootxx
57af6dc062Smarc */
587dd1926fSelan cgetstr(buf, "b0", &dp->d_boot0);
597dd1926fSelan cgetstr(buf, "b1", &dp->d_boot1);
607dd1926fSelan
617dd1926fSelan if (cgetstr(buf, "ty", &cq) > 0 && strcmp(cq, "removable") == 0)
6272f9a726Skarels dp->d_flags |= D_REMOVABLE;
6372f9a726Skarels else if (cq && strcmp(cq, "simulated") == 0)
6472f9a726Skarels dp->d_flags |= D_RAMDISK;
657dd1926fSelan if (cgetcap(buf, "sf", ':') != NULL)
6672f9a726Skarels dp->d_flags |= D_BADSECT;
67af6dc062Smarc
6872f9a726Skarels #define getnumdflt(field, dname, dflt) \
697dd1926fSelan { long f; (field) = (cgetnum(buf, dname, &f) == -1) ? (dflt) : f; }
7072f9a726Skarels
7172f9a726Skarels getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
727dd1926fSelan cgetnum(buf, "nt",(long *) &dp->d_ntracks);
737dd1926fSelan cgetnum(buf, "ns",(long *) &dp->d_nsectors);
747dd1926fSelan cgetnum(buf, "nc",(long *) &dp->d_ncylinders);
757dd1926fSelan
767dd1926fSelan if (cgetstr(buf, "dt", &cq) > 0)
7772f9a726Skarels dp->d_type = gettype(cq, dktypenames);
7872f9a726Skarels else
7972f9a726Skarels getnumdflt(dp->d_type, "dt", 0);
8072f9a726Skarels getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks);
8172f9a726Skarels getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders);
8272f9a726Skarels getnumdflt(dp->d_rpm, "rm", 3600);
8372f9a726Skarels getnumdflt(dp->d_interleave, "il", 1);
8472f9a726Skarels getnumdflt(dp->d_trackskew, "sk", 0);
8572f9a726Skarels getnumdflt(dp->d_cylskew, "cs", 0);
8672f9a726Skarels getnumdflt(dp->d_headswitch, "hs", 0);
8772f9a726Skarels getnumdflt(dp->d_trkseek, "ts", 0);
8872f9a726Skarels getnumdflt(dp->d_bbsize, "bs", BBSIZE);
8972f9a726Skarels getnumdflt(dp->d_sbsize, "sb", SBSIZE);
90ef743ec4Ssam strcpy(psize, "px");
91ef743ec4Ssam strcpy(pbsize, "bx");
92ef743ec4Ssam strcpy(pfsize, "fx");
9372f9a726Skarels strcpy(poffset, "ox");
9472f9a726Skarels strcpy(ptype, "tx");
9572f9a726Skarels max = 'a' - 1;
9672f9a726Skarels pp = &dp->d_partitions[0];
9772f9a726Skarels for (p = 'a'; p < 'a' + MAXPARTITIONS; p++, pp++) {
9872f9a726Skarels psize[1] = pbsize[1] = pfsize[1] = poffset[1] = ptype[1] = p;
997dd1926fSelan if (cgetnum(buf, psize,(long *) &pp->p_size) == -1)
10072f9a726Skarels pp->p_size = 0;
10172f9a726Skarels else {
1027dd1926fSelan cgetnum(buf, poffset, (long *) &pp->p_offset);
10372f9a726Skarels getnumdflt(pp->p_fsize, pfsize, 0);
1047dd1926fSelan if (pp->p_fsize) {
1058239f28fSralph long bsize;
1068239f28fSralph
1078239f28fSralph if (cgetnum(buf, pbsize, &bsize) == 0)
1088239f28fSralph pp->p_frag = bsize / pp->p_fsize;
1098239f28fSralph else
1108239f28fSralph pp->p_frag = 8;
1117dd1926fSelan }
11272f9a726Skarels getnumdflt(pp->p_fstype, ptype, 0);
1137dd1926fSelan if (pp->p_fstype == 0 && cgetstr(buf, ptype, &cq) > 0)
11472f9a726Skarels pp->p_fstype = gettype(cq, fstypenames);
11572f9a726Skarels max = p;
1169876a848Ssam }
11772f9a726Skarels }
11872f9a726Skarels dp->d_npartitions = max + 1 - 'a';
1190a8a25dfSbostic (void)strcpy(psize, "dx");
12072f9a726Skarels dx = dp->d_drivedata;
12172f9a726Skarels for (p = '0'; p < '0' + NDDATA; p++, dx++) {
12272f9a726Skarels psize[1] = p;
12372f9a726Skarels getnumdflt(*dx, psize, 0);
12472f9a726Skarels }
12572f9a726Skarels dp->d_magic = DISKMAGIC;
12672f9a726Skarels dp->d_magic2 = DISKMAGIC;
1277dd1926fSelan free(buf);
1289876a848Ssam return (dp);
1299876a848Ssam }
1309876a848Ssam
1317dd1926fSelan static int
gettype(t,names)13272f9a726Skarels gettype(t, names)
13372f9a726Skarels char *t;
13472f9a726Skarels char **names;
13572f9a726Skarels {
13672f9a726Skarels register char **nm;
13772f9a726Skarels
13872f9a726Skarels for (nm = names; *nm; nm++)
139c32170efSmckusick if (strcasecmp(t, *nm) == 0)
14072f9a726Skarels return (nm - names);
14172f9a726Skarels if (isdigit(*t))
14272f9a726Skarels return (atoi(t));
14372f9a726Skarels return (0);
14472f9a726Skarels }
14572f9a726Skarels
1467dd1926fSelan static int
error(err)147d5da809dSbostic error(err)
148d5da809dSbostic int err;
149d5da809dSbostic {
150d5da809dSbostic char *p;
151d5da809dSbostic
152d5da809dSbostic (void)write(STDERR_FILENO, "disktab: ", 9);
153d5da809dSbostic (void)write(STDERR_FILENO, _PATH_DISKTAB, sizeof(_PATH_DISKTAB) - 1);
1547f83c103Sbostic (void)write(STDERR_FILENO, ": ", 2);
155d5da809dSbostic p = strerror(err);
156d5da809dSbostic (void)write(STDERR_FILENO, p, strlen(p));
157d5da809dSbostic (void)write(STDERR_FILENO, "\n", 1);
158d5da809dSbostic }
159