2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright (c) 1994, 1995 Gordon W. Ross
5 * Copyright (c) 1994 Theo de Raadt
7 * Copyright (c) 1987, 1993
8 * The Regents of the University of California. All rights reserved.
10 * This code is derived from software contributed to Berkeley by
11 * Symmetric Computer Systems.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed by the University of
24 * California, Berkeley and its contributors.
25 * This product includes software developed by Theo de Raadt.
26 * 4. Neither the name of the University nor the names of its contributors
27 * may be used to endorse or promote products derived from this software
28 * without specific prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * from: $NetBSD: disksubr.c,v 1.13 2000/12/17 22:39:18 pk $
47 static const char copyright[] =
48 "@(#) Copyright (c) 1987, 1993\n\
49 The Regents of the University of California. All rights reserved.\n";
53 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94";
54 /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */
57 #include <sys/cdefs.h>
58 __FBSDID("$FreeBSD$");
60 #include <sys/param.h>
68 #define MAXPARTITIONS 20
69 #include <sys/disklabel.h>
82 #include "pathnames.h"
84 static void makelabel(const char *, struct disklabel *);
85 static int geom_class_available(const char *);
86 static int writelabel(void);
87 static int readlabel(int flag);
88 static void display(FILE *, const struct disklabel *);
89 static int edit(void);
90 static int editit(void);
91 static void fixlabel(struct disklabel *);
92 static char *skip(char *);
93 static char *word(char *);
94 static int getasciilabel(FILE *, struct disklabel *);
95 static int getasciipartspec(char *, struct disklabel *, int, int);
96 static int checklabel(struct disklabel *);
97 static void usage(void);
98 static struct disklabel *getvirginlabel(void);
100 #define DEFEDITOR _PATH_VI
101 #define DEFPARTITIONS 8
103 static char *specname;
105 static char tmpfil[] = PATH_TMPFILE;
107 static struct disklabel lab;
108 static u_char bootarea[BBSIZE];
109 static off_t mediasize;
110 static ssize_t secsize;
111 static char blank[] = "";
112 static char unknown[] = "unknown";
114 #define MAX_PART ('z')
115 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
116 static char part_size_type[MAX_NUM_PARTS];
117 static char part_offset_type[MAX_NUM_PARTS];
118 static int part_set[MAX_NUM_PARTS];
120 static int installboot; /* non-zero if we should install a boot program */
121 static int allfields; /* present all fields in edit */
122 static char const *xxboot; /* primary boot */
124 static uint32_t lba_offset;
126 #define LABELSECTOR -1
129 #define LABELOFFSET -1
131 static int labelsoffset = LABELSECTOR;
132 static int labeloffset = LABELOFFSET;
133 static int bbsize = BBSIZE;
136 UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT
140 static int disable_write; /* set to disable writing to disk label */
141 static int is_file; /* work on a file (abs. pathname), "-f" opt. */
144 main(int argc, char *argv[])
153 while ((ch = getopt(argc, argv, "ABb:efm:nRrw")) != -1)
168 if (!strcmp(optarg, "i386") ||
169 !strcmp(optarg, "amd64")) {
174 errx(1, "Unsupported architecture");
192 * We accept and ignore -r for compatibility with
193 * historical disklabel usage.
210 if (labelsoffset < 0 || labeloffset < 0)
211 errx(1, "a -m <architecture> option must be specified");
213 /* Figure out the names of the thing we're working on */
217 specname = g_device_path(argv[0]);
218 if (specname == NULL) {
219 warn("unable to get correct path for %s", argv[0]);
222 fd = open(specname, O_RDONLY);
224 warn("error opening %s", specname);
227 pname = g_providername(fd);
229 warn("error getting providername for %s", specname);
236 if (installboot && op == UNSPEC)
238 else if (op == UNSPEC)
258 display(stdout, NULL);
259 error = checklabel(NULL);
265 if (!(t = fopen(argv[1], "r")))
266 err(4, "fopen %s", argv[1]);
268 if (!getasciilabel(t, &lab))
270 error = writelabel();
281 makelabel(name, &lab);
283 if (checklabel(NULL) == 0)
284 error = writelabel();
292 makelabel(argv[1], &lab);
293 if (checklabel(NULL) == 0)
294 error = writelabel();
301 fixlabel(struct disklabel *lp)
303 struct partition *dp;
306 for (i = 0; i < lp->d_npartitions; i++) {
309 if (lp->d_partitions[i].p_size)
313 dp = &lp->d_partitions[0];
314 dp->p_offset = BBSIZE / secsize;
315 dp->p_size = lp->d_secperunit - dp->p_offset;
319 * Construct a prototype disklabel from /etc/disktab.
322 makelabel(const char *type, struct disklabel *lp)
324 struct disklabel *dp;
326 if (strcmp(type, "auto") == 0)
327 dp = getvirginlabel();
329 dp = getdiskbyname(type);
331 errx(1, "%s: unknown disk type", type);
333 bzero(lp->d_packname, sizeof(lp->d_packname));
343 xxboot = "/boot/boot";
344 fd = open(xxboot, O_RDONLY);
346 err(1, "cannot open %s", xxboot);
348 if (st.st_size <= BBSIZE) {
349 if (read(fd, bootarea, st.st_size) != st.st_size)
350 err(1, "read error %s", xxboot);
354 errx(1, "boot code %s is wrong size", xxboot);
358 geom_class_available(const char *name)
360 struct gclass *class;
364 error = geom_gettree(&mesh);
366 errc(1, error, "Cannot get GEOM tree");
368 LIST_FOREACH(class, &mesh.lg_class, lg_class) {
369 if (strcmp(class->lg_name, name) == 0) {
370 geom_deletetree(&mesh);
375 geom_deletetree(&mesh);
384 struct disklabel *lp = &lab;
387 warnx("write to disk label suppressed - label was as follows:");
388 display(stdout, NULL);
392 lp->d_magic = DISKMAGIC;
393 lp->d_magic2 = DISKMAGIC;
395 lp->d_checksum = dkcksum(lp);
398 for (i = 0; i < lab.d_npartitions; i++)
399 if (lab.d_partitions[i].p_size)
400 lab.d_partitions[i].p_offset += lba_offset;
401 bsd_disklabel_le_enc(bootarea + labeloffset + labelsoffset * lab.d_secsize,
404 fd = open(specname, O_RDWR);
407 warn("cannot open file %s for writing label", specname);
412 if (geom_class_available("PART") != 0) {
414 * Since we weren't able open provider for
415 * writing, then recommend user to use gpart(8).
418 "cannot open provider %s for writing label",
420 warnx("Try to use gpart(8).");
424 warnc(serrno, "%s", specname);
427 if (write(fd, bootarea, bbsize) != bbsize) {
428 warn("write %s", specname);
438 get_file_parms(int f)
443 if (fstat(f, &sb) != 0)
444 err(4, "fstat failed");
445 i = sb.st_mode & S_IFMT;
446 if (i != S_IFREG && i != S_IFLNK)
447 errx(4, "%s is not a valid file or link", specname);
449 mediasize = sb.st_size;
453 * Fetch disklabel for disk.
463 f = open(specname, O_RDONLY);
465 err(1, "%s", specname);
469 mediasize = g_mediasize(f);
470 secsize = g_sectorsize(f);
471 if (secsize < 0 || mediasize < 0)
472 err(4, "cannot get disk geometry");
474 if (mediasize > (off_t)0xffffffff * secsize)
476 "disks with more than 2^32-1 sectors are not supported");
477 (void)lseek(f, (off_t)0, SEEK_SET);
478 nbytes = read(f, bootarea, BBSIZE);
480 err(4, "%s read", specname);
481 if (nbytes != BBSIZE)
482 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname);
484 error = bsd_disklabel_le_dec(
485 bootarea + (labeloffset + labelsoffset * secsize),
486 &lab, MAXPARTITIONS);
488 errx(1, "%s: no valid label found", specname);
494 * Compensate for absolute block addressing by finding the
495 * smallest partition offset and if the offset of the 'c'
496 * partition is equal to that, subtract it from all offsets.
499 for (i = 0; i < lab.d_npartitions; i++) {
500 if (lab.d_partitions[i].p_size)
501 lba = MIN(lba, lab.d_partitions[i].p_offset);
503 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) {
504 for (i = 0; i < lab.d_npartitions; i++) {
505 if (lab.d_partitions[i].p_size)
506 lab.d_partitions[i].p_offset -= lba;
509 * Save the offset so that we can write the label
510 * back with absolute block addresses.
519 display(FILE *f, const struct disklabel *lp)
522 const struct partition *pp;
527 fprintf(f, "# %s:\n", specname);
529 if (lp->d_type < DKMAXTYPES)
530 fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
532 fprintf(f, "type: %u\n", lp->d_type);
533 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
535 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
537 fprintf(f, "flags:");
538 if (lp->d_flags & D_REMOVABLE)
539 fprintf(f, " removeable");
540 if (lp->d_flags & D_ECC)
542 if (lp->d_flags & D_BADSECT)
543 fprintf(f, " badsect");
545 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
546 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
547 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
548 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
549 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
550 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
551 fprintf(f, "rpm: %u\n", lp->d_rpm);
552 fprintf(f, "interleave: %u\n", lp->d_interleave);
553 fprintf(f, "trackskew: %u\n", lp->d_trackskew);
554 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
555 fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
556 (u_long)lp->d_headswitch);
557 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
558 (u_long)lp->d_trkseek);
559 fprintf(f, "drivedata: ");
560 for (i = NDDATA - 1; i >= 0; i--)
561 if (lp->d_drivedata[i])
565 for (j = 0; j <= i; j++)
566 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
569 fprintf(f, "%u partitions:\n", lp->d_npartitions);
571 "# size offset fstype [fsize bsize bps/cpg]\n");
572 pp = lp->d_partitions;
573 for (i = 0; i < lp->d_npartitions; i++, pp++) {
575 fprintf(f, " %c: %10lu %10lu ", 'a' + i,
576 (u_long)pp->p_size, (u_long)pp->p_offset);
577 if (pp->p_fstype < FSMAXTYPES)
578 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
580 fprintf(f, "%8d", pp->p_fstype);
581 switch (pp->p_fstype) {
583 case FS_UNUSED: /* XXX */
584 fprintf(f, " %5lu %5lu %2s",
586 (u_long)(pp->p_fsize * pp->p_frag), "");
590 fprintf(f, " %5lu %5lu %5u",
592 (u_long)(pp->p_fsize * pp->p_frag),
597 fprintf(f, " %5lu %5lu %5d",
599 (u_long)(pp->p_fsize * pp->p_frag),
604 fprintf(f, "%20.20s", "");
608 fprintf(f, " # \"raw\" part, don't edit");
620 struct disklabel label;
623 if ((fd = mkstemp(tmpfil)) == -1 ||
624 (fp = fdopen(fd, "w")) == NULL) {
625 warnx("can't create %s", tmpfil);
633 fp = fopen(tmpfil, "r");
635 warnx("can't reopen %s for reading", tmpfil);
638 bzero((char *)&label, sizeof(label));
639 c = getasciilabel(fp, &label);
643 if (writelabel() == 0) {
644 (void) unlink(tmpfil);
648 printf("re-edit the label? [y]: ");
651 if (c != EOF && c != (int)'\n')
652 while (getchar() != (int)'\n')
657 (void) unlink(tmpfil);
670 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
671 while ((pid = fork()) < 0) {
672 if (errno == EPROCLIM) {
673 warnx("you have too many processes");
676 if (errno != EAGAIN) {
685 if (setresgid(gid, gid, gid) == -1)
688 if (setresuid(uid, uid, uid) == -1)
690 if ((ed = getenv("EDITOR")) == (char *)0)
692 execlp(ed, ed, tmpfil, (char *)0);
695 while ((xpid = wait(&locstat)) >= 0)
706 while (*cp != '\0' && isspace(*cp))
708 if (*cp == '\0' || *cp == '#')
718 while (*cp != '\0' && !isspace(*cp) && *cp != '#')
720 if ((c = *cp) != '\0') {
729 * Read an ascii label in from fd f,
730 * in the same format as that put out by display(),
734 getasciilabel(FILE *f, struct disklabel *lp)
739 char *tp, line[BUFSIZ];
741 int lineno = 0, errors = 0;
744 makelabel("auto", lp);
745 bzero(&part_set, sizeof(part_set));
746 bzero(&part_size_type, sizeof(part_size_type));
747 bzero(&part_offset_type, sizeof(part_offset_type));
748 lp->d_bbsize = BBSIZE; /* XXX */
749 lp->d_sbsize = 0; /* XXX */
750 while (fgets(line, sizeof(line) - 1, f)) {
752 if ((cp = strchr(line,'\n')) != NULL)
757 tp = strchr(cp, ':');
759 fprintf(stderr, "line %d: syntax error\n", lineno);
763 *tp++ = '\0', tp = skip(tp);
764 if (!strcmp(cp, "type")) {
768 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
769 if (*cpp && !strcmp(*cpp, tp)) {
770 lp->d_type = cpp - dktypenames;
773 if (cpp < &dktypenames[DKMAXTYPES])
776 v = strtoul(tp, &endp, 10);
777 if (errno != 0 || *endp != '\0')
780 fprintf(stderr, "line %d:%s %lu\n", lineno,
781 "Warning, unknown disk type", v);
786 if (!strcmp(cp, "flags")) {
787 for (v = 0; (cp = tp) && *cp != '\0';) {
789 if (!strcmp(cp, "removeable"))
791 else if (!strcmp(cp, "ecc"))
793 else if (!strcmp(cp, "badsect"))
797 "line %d: %s: bad flag\n",
805 if (!strcmp(cp, "drivedata")) {
806 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
807 lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
812 if (sscanf(cp, "%lu partitions", &v) == 1) {
813 if (v > MAXPARTITIONS) {
815 "line %d: bad # of partitions\n", lineno);
816 lp->d_npartitions = MAXPARTITIONS;
818 } else if (v < DEFPARTITIONS) {
820 "line %d: bad # of partitions\n", lineno);
821 lp->d_npartitions = DEFPARTITIONS;
824 lp->d_npartitions = v;
829 if (!strcmp(cp, "disk")) {
830 strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
833 if (!strcmp(cp, "label")) {
834 strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
837 if (!strcmp(cp, "bytes/sector")) {
838 v = strtoul(tp, NULL, 10);
839 if (v == 0 || (v % DEV_BSIZE) != 0) {
841 "line %d: %s: bad sector size\n",
848 if (!strcmp(cp, "sectors/track")) {
849 v = strtoul(tp, NULL, 10);
850 #if (ULONG_MAX != 0xffffffffUL)
851 if (v == 0 || v > 0xffffffff)
856 fprintf(stderr, "line %d: %s: bad %s\n",
863 if (!strcmp(cp, "sectors/cylinder")) {
864 v = strtoul(tp, NULL, 10);
866 fprintf(stderr, "line %d: %s: bad %s\n",
873 if (!strcmp(cp, "tracks/cylinder")) {
874 v = strtoul(tp, NULL, 10);
876 fprintf(stderr, "line %d: %s: bad %s\n",
883 if (!strcmp(cp, "cylinders")) {
884 v = strtoul(tp, NULL, 10);
886 fprintf(stderr, "line %d: %s: bad %s\n",
890 lp->d_ncylinders = v;
893 if (!strcmp(cp, "sectors/unit")) {
894 v = strtoul(tp, NULL, 10);
896 fprintf(stderr, "line %d: %s: bad %s\n",
900 lp->d_secperunit = v;
903 if (!strcmp(cp, "rpm")) {
904 v = strtoul(tp, NULL, 10);
905 if (v == 0 || v > USHRT_MAX) {
906 fprintf(stderr, "line %d: %s: bad %s\n",
913 if (!strcmp(cp, "interleave")) {
914 v = strtoul(tp, NULL, 10);
915 if (v == 0 || v > USHRT_MAX) {
916 fprintf(stderr, "line %d: %s: bad %s\n",
920 lp->d_interleave = v;
923 if (!strcmp(cp, "trackskew")) {
924 v = strtoul(tp, NULL, 10);
926 fprintf(stderr, "line %d: %s: bad %s\n",
933 if (!strcmp(cp, "cylinderskew")) {
934 v = strtoul(tp, NULL, 10);
936 fprintf(stderr, "line %d: %s: bad %s\n",
943 if (!strcmp(cp, "headswitch")) {
944 v = strtoul(tp, NULL, 10);
945 lp->d_headswitch = v;
948 if (!strcmp(cp, "track-to-track seek")) {
949 v = strtoul(tp, NULL, 10);
953 /* the ':' was removed above */
954 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
956 "line %d: %s: Unknown disklabel field\n", lineno,
962 /* Process a partition specification line. */
964 if (part >= lp->d_npartitions) {
966 "line %d: partition name out of range a-%c: %s\n",
967 lineno, 'a' + lp->d_npartitions - 1, cp);
973 if (getasciipartspec(tp, lp, part, lineno) != 0) {
978 errors += checklabel(lp);
979 return (errors == 0);
982 #define NXTNUM(n) do { \
984 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
987 cp = tp, tp = word(cp); \
988 (n) = strtoul(cp, NULL, 10); \
992 /* retain 1 character following number */
993 #define NXTWORD(w,n) do { \
995 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
999 cp = tp, tp = word(cp); \
1000 (n) = strtoul(cp, &tmp, 10); \
1001 if (tmp) (w) = *tmp; \
1006 * Read a partition line into partition `part' in the specified disklabel.
1007 * Return 0 on success, 1 on failure.
1010 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno)
1012 struct partition *pp;
1017 pp = &lp->d_partitions[part];
1021 NXTWORD(part_size_type[part],v);
1022 if (v == 0 && part_size_type[part] != '*') {
1024 "line %d: %s: bad partition size\n", lineno, cp);
1030 NXTWORD(part_offset_type[part],v);
1031 if (v == 0 && part_offset_type[part] != '*' &&
1032 part_offset_type[part] != '\0') {
1034 "line %d: %s: bad partition offset\n", lineno, cp);
1039 fprintf(stderr, "line %d: missing file system type\n", lineno);
1042 cp = tp, tp = word(cp);
1043 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1044 if (*cpp && !strcmp(*cpp, cp))
1047 pp->p_fstype = cpp - fstypenames;
1051 v = strtoul(cp, &endp, 10);
1052 if (errno != 0 || *endp != '\0')
1056 if (v >= FSMAXTYPES) {
1058 "line %d: Warning, unknown file system type %s\n",
1065 switch (pp->p_fstype) {
1069 /* accept defaults for fsize/frag/cpg */
1071 NXTNUM(pp->p_fsize);
1072 if (pp->p_fsize == 0)
1075 pp->p_frag = v / pp->p_fsize;
1079 /* else default to 0's */
1088 * Check disklabel for errors and fill in
1089 * derived fields according to supplied values.
1092 checklabel(struct disklabel *lp)
1094 struct partition *pp;
1097 u_long base_offset, needed, total_size, total_percent, current_offset;
1099 int seen_default_offset;
1102 struct partition *pp2;
1109 if (lp->d_secsize == 0) {
1110 fprintf(stderr, "sector size 0\n");
1113 if (lp->d_nsectors == 0) {
1114 fprintf(stderr, "sectors/track 0\n");
1117 if (lp->d_ntracks == 0) {
1118 fprintf(stderr, "tracks/cylinder 0\n");
1121 if (lp->d_ncylinders == 0) {
1122 fprintf(stderr, "cylinders/unit 0\n");
1126 warnx("revolutions/minute 0");
1127 if (lp->d_secpercyl == 0)
1128 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1129 if (lp->d_secperunit == 0)
1130 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1131 if (lp->d_bbsize == 0) {
1132 fprintf(stderr, "boot block size 0\n");
1134 } else if (lp->d_bbsize % lp->d_secsize)
1135 warnx("boot block size %% sector-size != 0");
1136 if (lp->d_npartitions > MAXPARTITIONS) {
1137 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)",
1138 (u_long)lp->d_npartitions, MAXPARTITIONS);
1141 if (lp->d_npartitions < DEFPARTITIONS) {
1142 warnx("number of partitions (%lu) < DEFPARTITIONS (%d)",
1143 (u_long)lp->d_npartitions, DEFPARTITIONS);
1147 struct disklabel *vl;
1149 vl = getvirginlabel();
1150 if (lp->d_secsize == 0)
1151 lp->d_secsize = vl->d_secsize;
1152 if (lp->d_nsectors == 0)
1153 lp->d_nsectors = vl->d_nsectors;
1154 if (lp->d_ntracks == 0)
1155 lp->d_ntracks = vl->d_ntracks;
1156 if (lp->d_ncylinders == 0)
1157 lp->d_ncylinders = vl->d_ncylinders;
1159 lp->d_rpm = vl->d_rpm;
1160 if (lp->d_interleave == 0)
1161 lp->d_interleave = vl->d_interleave;
1162 if (lp->d_secpercyl == 0)
1163 lp->d_secpercyl = vl->d_secpercyl;
1164 if (lp->d_secperunit == 0 ||
1165 lp->d_secperunit > vl->d_secperunit)
1166 lp->d_secperunit = vl->d_secperunit;
1167 if (lp->d_bbsize == 0)
1168 lp->d_bbsize = vl->d_bbsize;
1169 if (lp->d_npartitions < DEFPARTITIONS ||
1170 lp->d_npartitions > MAXPARTITIONS)
1171 lp->d_npartitions = vl->d_npartitions;
1175 /* first allocate space to the partitions, then offsets */
1176 total_size = 0; /* in sectors */
1177 total_percent = 0; /* in percent */
1179 /* find all fixed partitions */
1180 for (i = 0; i < lp->d_npartitions; i++) {
1181 pp = &lp->d_partitions[i];
1183 if (part_size_type[i] == '*') {
1184 if (i == RAW_PART) {
1185 pp->p_size = lp->d_secperunit;
1188 warnx("Too many '*' partitions (%c and %c)",
1189 hog_part + 'a',i + 'a');
1197 switch (part_size_type[i]) {
1199 total_percent += size;
1220 warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)",
1221 part_size_type[i], i + 'a');
1224 /* don't count %'s yet */
1225 if (part_size_type[i] != '%') {
1227 * for all not in sectors, convert to
1230 if (part_size_type[i] != '\0') {
1231 if (size % lp->d_secsize != 0)
1232 warnx("partition %c not an integer number of sectors",
1234 size /= lp->d_secsize;
1237 /* else already in sectors */
1245 /* Find out the total free space, excluding the boot block area. */
1246 base_offset = BBSIZE / secsize;
1248 for (i = 0; i < lp->d_npartitions; i++) {
1249 pp = &lp->d_partitions[i];
1250 if (!part_set[i] || i == RAW_PART ||
1251 part_size_type[i] == '%' || part_size_type[i] == '*')
1253 if (pp->p_offset > base_offset)
1254 free_space += pp->p_offset - base_offset;
1255 if (pp->p_offset + pp->p_size > base_offset)
1256 base_offset = pp->p_offset + pp->p_size;
1258 if (base_offset < lp->d_secperunit)
1259 free_space += lp->d_secperunit - base_offset;
1261 /* handle % partitions - note %'s don't need to add up to 100! */
1262 if (total_percent != 0) {
1263 if (total_percent > 100) {
1264 fprintf(stderr,"total percentage %lu is greater than 100\n",
1269 if (free_space > 0) {
1270 for (i = 0; i < lp->d_npartitions; i++) {
1271 pp = &lp->d_partitions[i];
1272 if (part_set[i] && part_size_type[i] == '%') {
1273 /* careful of overflows! and integer roundoff */
1274 pp->p_size = ((double)pp->p_size/100) * free_space;
1275 total_size += pp->p_size;
1277 /* FIX we can lose a sector or so due to roundoff per
1278 partition. A more complex algorithm could avoid that */
1283 "%ld sectors available to give to '*' and '%%' partitions\n",
1286 /* fix? set all % partitions to size 0? */
1289 /* give anything remaining to the hog partition */
1290 if (hog_part != -1) {
1292 * Find the range of offsets usable by '*' partitions around
1293 * the hog partition and how much space they need.
1296 base_offset = BBSIZE / secsize;
1297 for (i = hog_part - 1; i >= 0; i--) {
1298 pp = &lp->d_partitions[i];
1299 if (!part_set[i] || i == RAW_PART)
1301 if (part_offset_type[i] == '*') {
1302 needed += pp->p_size;
1305 base_offset = pp->p_offset + pp->p_size;
1308 current_offset = lp->d_secperunit;
1309 for (i = lp->d_npartitions - 1; i > hog_part; i--) {
1310 pp = &lp->d_partitions[i];
1311 if (!part_set[i] || i == RAW_PART)
1313 if (part_offset_type[i] == '*') {
1314 needed += pp->p_size;
1317 current_offset = pp->p_offset;
1320 if (current_offset - base_offset <= needed) {
1321 fprintf(stderr, "Cannot find space for partition %c\n",
1324 "Need more than %lu sectors between %lu and %lu\n",
1325 needed, base_offset, current_offset);
1327 lp->d_partitions[hog_part].p_size = 0;
1329 lp->d_partitions[hog_part].p_size = current_offset -
1330 base_offset - needed;
1331 total_size += lp->d_partitions[hog_part].p_size;
1335 /* Now set the offsets for each partition */
1336 current_offset = BBSIZE / secsize; /* in sectors */
1337 seen_default_offset = 0;
1338 for (i = 0; i < lp->d_npartitions; i++) {
1340 pp = &lp->d_partitions[i];
1342 if (part_offset_type[i] == '*') {
1343 if (i == RAW_PART) {
1346 pp->p_offset = current_offset;
1347 seen_default_offset = 1;
1350 /* allow them to be out of order for old-style tables */
1351 if (pp->p_offset < current_offset &&
1352 seen_default_offset && i != RAW_PART &&
1353 pp->p_fstype != FS_VINUM) {
1355 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1356 (long)pp->p_offset,i+'a',current_offset);
1358 "Labels with any *'s for offset must be in ascending order by sector\n");
1360 } else if (pp->p_offset != current_offset &&
1361 i != RAW_PART && seen_default_offset) {
1363 * this may give unneeded warnings if
1364 * partitions are out-of-order
1367 "Offset %ld for partition %c doesn't match expected value %ld",
1368 (long)pp->p_offset, i + 'a', current_offset);
1372 current_offset = pp->p_offset + pp->p_size;
1376 for (i = 0; i < lp->d_npartitions; i++) {
1378 pp = &lp->d_partitions[i];
1379 if (pp->p_size == 0 && pp->p_offset != 0)
1380 warnx("partition %c: size 0, but offset %lu",
1381 part, (u_long)pp->p_offset);
1383 if (pp->p_size % lp->d_secpercyl)
1384 warnx("partition %c: size %% cylinder-size != 0",
1386 if (pp->p_offset % lp->d_secpercyl)
1387 warnx("partition %c: offset %% cylinder-size != 0",
1390 if (pp->p_offset > lp->d_secperunit) {
1392 "partition %c: offset past end of unit\n", part);
1395 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1397 "partition %c: partition extends past end of unit\n",
1401 if (i == RAW_PART) {
1402 if (pp->p_fstype != FS_UNUSED)
1403 warnx("partition %c is not marked as unused!",part);
1404 if (pp->p_offset != 0)
1405 warnx("partition %c doesn't start at 0!",part);
1406 if (pp->p_size != lp->d_secperunit)
1407 warnx("partition %c doesn't cover the whole unit!",part);
1409 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1410 (pp->p_size != lp->d_secperunit)) {
1411 warnx("An incorrect partition %c may cause problems for "
1412 "standard system utilities",part);
1416 /* check for overlaps */
1417 /* this will check for all possible overlaps once and only once */
1418 for (j = 0; j < i; j++) {
1419 pp2 = &lp->d_partitions[j];
1420 if (j != RAW_PART && i != RAW_PART &&
1421 pp->p_fstype != FS_VINUM &&
1422 pp2->p_fstype != FS_VINUM &&
1423 part_set[i] && part_set[j]) {
1424 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1425 (pp2->p_offset + pp2->p_size > pp->p_offset ||
1426 pp2->p_offset >= pp->p_offset)) {
1427 fprintf(stderr,"partitions %c and %c overlap!\n",
1434 for (; i < lp->d_npartitions; i++) {
1436 pp = &lp->d_partitions[i];
1437 if (pp->p_size || pp->p_offset)
1438 warnx("unused partition %c: size %d offset %lu",
1439 'a' + i, pp->p_size, (u_long)pp->p_offset);
1445 * When operating on a "virgin" disk, try getting an initial label
1446 * from the associated device driver. This might work for all device
1447 * drivers that are able to fetch some initial device parameters
1448 * without even having access to a (BSD) disklabel, like SCSI disks,
1449 * most IDE drives, or vn devices.
1451 * The device name must be given in its "canonical" form.
1453 static struct disklabel *
1454 getvirginlabel(void)
1456 static struct disklabel loclab;
1457 struct partition *dp;
1461 if ((f = open(specname, O_RDONLY)) == -1) {
1462 warn("cannot open %s", specname);
1469 mediasize = g_mediasize(f);
1470 secsize = g_sectorsize(f);
1471 if (secsize < 0 || mediasize < 0) {
1476 memset(&loclab, 0, sizeof loclab);
1477 loclab.d_magic = DISKMAGIC;
1478 loclab.d_magic2 = DISKMAGIC;
1479 loclab.d_secsize = secsize;
1480 loclab.d_secperunit = mediasize / secsize;
1483 * Nobody in these enlightened days uses the CHS geometry for
1484 * anything, but nonetheless try to get it right. If we fail
1485 * to get any good ideas from the device, construct something
1486 * which is IBM-PC friendly.
1488 if (ioctl(f, DIOCGFWSECTORS, &u) == 0)
1489 loclab.d_nsectors = u;
1491 loclab.d_nsectors = 63;
1492 if (ioctl(f, DIOCGFWHEADS, &u) == 0)
1493 loclab.d_ntracks = u;
1494 else if (loclab.d_secperunit <= 63*1*1024)
1495 loclab.d_ntracks = 1;
1496 else if (loclab.d_secperunit <= 63*16*1024)
1497 loclab.d_ntracks = 16;
1499 loclab.d_ntracks = 255;
1500 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors;
1501 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl;
1502 loclab.d_npartitions = DEFPARTITIONS;
1504 /* Various (unneeded) compat stuff */
1505 loclab.d_rpm = 3600;
1506 loclab.d_bbsize = BBSIZE;
1507 loclab.d_interleave = 1;
1508 strncpy(loclab.d_typename, "amnesiac",
1509 sizeof(loclab.d_typename));
1511 dp = &loclab.d_partitions[RAW_PART];
1512 dp->p_size = loclab.d_secperunit;
1513 loclab.d_checksum = dkcksum(&loclab);
1523 "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1524 "usage: bsdlabel disk",
1525 "\t\t(to read label)",
1526 " bsdlabel -w [-n] [-m machine] disk [type]",
1527 "\t\t(to write label with existing boot program)",
1528 " bsdlabel -e [-n] [-m machine] disk",
1529 "\t\t(to edit label)",
1530 " bsdlabel -R [-n] [-m machine] disk protofile",
1531 "\t\t(to restore label with existing boot program)",
1532 " bsdlabel -B [-b boot] [-m machine] disk",
1533 "\t\t(to install boot program with existing on-disk label)",
1534 " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]",
1535 "\t\t(to write label and install boot program)",
1536 " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile",
1537 "\t\t(to restore label and install boot program)"