2 * Copyright (c) 1994, 1995 Gordon W. Ross
3 * Copyright (c) 1994 Theo de Raadt
5 * Copyright (c) 1987, 1993
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
9 * Symmetric Computer Systems.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * This product includes software developed by Theo de Raadt.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * from: $NetBSD: disksubr.c,v 1.13 2000/12/17 22:39:18 pk $
45 static const char copyright[] =
46 "@(#) Copyright (c) 1987, 1993\n\
47 The Regents of the University of California. All rights reserved.\n";
51 static char sccsid[] = "@(#)disklabel.c 8.2 (Berkeley) 1/7/94";
52 /* from static char sccsid[] = "@(#)disklabel.c 1.2 (Symmetric) 11/28/85"; */
55 #include <sys/cdefs.h>
56 __FBSDID("$FreeBSD$");
58 #include <sys/param.h>
66 #define MAXPARTITIONS 20
67 #include <sys/disklabel.h>
80 #include "pathnames.h"
82 static void makelabel(const char *, struct disklabel *);
83 static int geom_class_available(const char *);
84 static int writelabel(void);
85 static int readlabel(int flag);
86 static void display(FILE *, const struct disklabel *);
87 static int edit(void);
88 static int editit(void);
89 static void fixlabel(struct disklabel *);
90 static char *skip(char *);
91 static char *word(char *);
92 static int getasciilabel(FILE *, struct disklabel *);
93 static int getasciipartspec(char *, struct disklabel *, int, int);
94 static int checklabel(struct disklabel *);
95 static void usage(void);
96 static struct disklabel *getvirginlabel(void);
98 #define DEFEDITOR _PATH_VI
99 #define DEFPARTITIONS 8
101 static char *specname;
103 static char tmpfil[] = PATH_TMPFILE;
105 static struct disklabel lab;
106 static u_char bootarea[BBSIZE];
107 static off_t mediasize;
108 static ssize_t secsize;
109 static char blank[] = "";
110 static char unknown[] = "unknown";
112 #define MAX_PART ('z')
113 #define MAX_NUM_PARTS (1 + MAX_PART - 'a')
114 static char part_size_type[MAX_NUM_PARTS];
115 static char part_offset_type[MAX_NUM_PARTS];
116 static int part_set[MAX_NUM_PARTS];
118 static int installboot; /* non-zero if we should install a boot program */
119 static int allfields; /* present all fields in edit */
120 static char const *xxboot; /* primary boot */
122 static uint32_t lba_offset;
124 #define LABELSECTOR -1
127 #define LABELOFFSET -1
129 static int labelsoffset = LABELSECTOR;
130 static int labeloffset = LABELOFFSET;
131 static int bbsize = BBSIZE;
134 UNSPEC, EDIT, READ, RESTORE, WRITE, WRITEBOOT
138 static int disable_write; /* set to disable writing to disk label */
139 static int is_file; /* work on a file (abs. pathname), "-f" opt. */
142 main(int argc, char *argv[])
151 while ((ch = getopt(argc, argv, "ABb:efm:nRrw")) != -1)
166 if (!strcmp(optarg, "i386") ||
167 !strcmp(optarg, "amd64")) {
172 errx(1, "Unsupported architecture");
190 * We accept and ignore -r for compatibility with
191 * historical disklabel usage.
208 if (labelsoffset < 0 || labeloffset < 0)
209 errx(1, "a -m <architecture> option must be specified");
211 /* Figure out the names of the thing we're working on */
215 specname = g_device_path(argv[0]);
216 if (specname == NULL) {
217 warn("unable to get correct path for %s", argv[0]);
220 fd = open(specname, O_RDONLY);
222 warn("error opening %s", specname);
225 pname = g_providername(fd);
227 warn("error getting providername for %s", specname);
234 if (installboot && op == UNSPEC)
236 else if (op == UNSPEC)
256 display(stdout, NULL);
257 error = checklabel(NULL);
263 if (!(t = fopen(argv[1], "r")))
264 err(4, "fopen %s", argv[1]);
266 if (!getasciilabel(t, &lab))
268 error = writelabel();
279 makelabel(name, &lab);
281 if (checklabel(NULL) == 0)
282 error = writelabel();
290 makelabel(argv[1], &lab);
291 if (checklabel(NULL) == 0)
292 error = writelabel();
299 fixlabel(struct disklabel *lp)
301 struct partition *dp;
304 for (i = 0; i < lp->d_npartitions; i++) {
307 if (lp->d_partitions[i].p_size)
311 dp = &lp->d_partitions[0];
312 dp->p_offset = BBSIZE / secsize;
313 dp->p_size = lp->d_secperunit - dp->p_offset;
317 * Construct a prototype disklabel from /etc/disktab.
320 makelabel(const char *type, struct disklabel *lp)
322 struct disklabel *dp;
324 if (strcmp(type, "auto") == 0)
325 dp = getvirginlabel();
327 dp = getdiskbyname(type);
329 errx(1, "%s: unknown disk type", type);
331 bzero(lp->d_packname, sizeof(lp->d_packname));
341 xxboot = "/boot/boot";
342 fd = open(xxboot, O_RDONLY);
344 err(1, "cannot open %s", xxboot);
346 if (st.st_size <= BBSIZE) {
347 if (read(fd, bootarea, st.st_size) != st.st_size)
348 err(1, "read error %s", xxboot);
352 errx(1, "boot code %s is wrong size", xxboot);
356 geom_class_available(const char *name)
358 struct gclass *class;
362 error = geom_gettree(&mesh);
364 errc(1, error, "Cannot get GEOM tree");
366 LIST_FOREACH(class, &mesh.lg_class, lg_class) {
367 if (strcmp(class->lg_name, name) == 0) {
368 geom_deletetree(&mesh);
373 geom_deletetree(&mesh);
382 struct gctl_req *grq;
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 /* Give up if GEOM_BSD is not available. */
425 if (geom_class_available("BSD") == 0) {
426 warnc(serrno, "%s", specname);
430 grq = gctl_get_handle();
431 gctl_ro_param(grq, "verb", -1, "write label");
432 gctl_ro_param(grq, "class", -1, "BSD");
433 gctl_ro_param(grq, "geom", -1, pname);
434 gctl_ro_param(grq, "label", 148+16*8,
435 bootarea + labeloffset + labelsoffset * lab.d_secsize);
436 errstr = gctl_issue(grq);
437 if (errstr != NULL) {
444 grq = gctl_get_handle();
445 gctl_ro_param(grq, "verb", -1, "write bootcode");
446 gctl_ro_param(grq, "class", -1, "BSD");
447 gctl_ro_param(grq, "geom", -1, pname);
448 gctl_ro_param(grq, "bootcode", BBSIZE, bootarea);
449 errstr = gctl_issue(grq);
450 if (errstr != NULL) {
458 if (write(fd, bootarea, bbsize) != bbsize) {
459 warn("write %s", specname);
469 get_file_parms(int f)
474 if (fstat(f, &sb) != 0)
475 err(4, "fstat failed");
476 i = sb.st_mode & S_IFMT;
477 if (i != S_IFREG && i != S_IFLNK)
478 errx(4, "%s is not a valid file or link", specname);
480 mediasize = sb.st_size;
484 * Fetch disklabel for disk.
494 f = open(specname, O_RDONLY);
496 err(1, "%s", specname);
500 mediasize = g_mediasize(f);
501 secsize = g_sectorsize(f);
502 if (secsize < 0 || mediasize < 0)
503 err(4, "cannot get disk geometry");
505 if (mediasize > (off_t)0xffffffff * secsize)
507 "disks with more than 2^32-1 sectors are not supported");
508 (void)lseek(f, (off_t)0, SEEK_SET);
509 nbytes = read(f, bootarea, BBSIZE);
511 err(4, "%s read", specname);
512 if (nbytes != BBSIZE)
513 errx(4, "couldn't read %d bytes from %s", BBSIZE, specname);
515 error = bsd_disklabel_le_dec(
516 bootarea + (labeloffset + labelsoffset * secsize),
517 &lab, MAXPARTITIONS);
519 errx(1, "%s: no valid label found", specname);
525 * Compensate for absolute block addressing by finding the
526 * smallest partition offset and if the offset of the 'c'
527 * partition is equal to that, subtract it from all offsets.
530 for (i = 0; i < lab.d_npartitions; i++) {
531 if (lab.d_partitions[i].p_size)
532 lba = MIN(lba, lab.d_partitions[i].p_offset);
534 if (lba != 0 && lab.d_partitions[RAW_PART].p_offset == lba) {
535 for (i = 0; i < lab.d_npartitions; i++) {
536 if (lab.d_partitions[i].p_size)
537 lab.d_partitions[i].p_offset -= lba;
540 * Save the offset so that we can write the label
541 * back with absolute block addresses.
550 display(FILE *f, const struct disklabel *lp)
553 const struct partition *pp;
558 fprintf(f, "# %s:\n", specname);
560 if (lp->d_type < DKMAXTYPES)
561 fprintf(f, "type: %s\n", dktypenames[lp->d_type]);
563 fprintf(f, "type: %u\n", lp->d_type);
564 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename),
566 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname),
568 fprintf(f, "flags:");
569 if (lp->d_flags & D_REMOVABLE)
570 fprintf(f, " removeable");
571 if (lp->d_flags & D_ECC)
573 if (lp->d_flags & D_BADSECT)
574 fprintf(f, " badsect");
576 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize);
577 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors);
578 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks);
579 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl);
580 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders);
581 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit);
582 fprintf(f, "rpm: %u\n", lp->d_rpm);
583 fprintf(f, "interleave: %u\n", lp->d_interleave);
584 fprintf(f, "trackskew: %u\n", lp->d_trackskew);
585 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew);
586 fprintf(f, "headswitch: %lu\t\t# milliseconds\n",
587 (u_long)lp->d_headswitch);
588 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n",
589 (u_long)lp->d_trkseek);
590 fprintf(f, "drivedata: ");
591 for (i = NDDATA - 1; i >= 0; i--)
592 if (lp->d_drivedata[i])
596 for (j = 0; j <= i; j++)
597 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]);
600 fprintf(f, "%u partitions:\n", lp->d_npartitions);
602 "# size offset fstype [fsize bsize bps/cpg]\n");
603 pp = lp->d_partitions;
604 for (i = 0; i < lp->d_npartitions; i++, pp++) {
606 fprintf(f, " %c: %10lu %10lu ", 'a' + i,
607 (u_long)pp->p_size, (u_long)pp->p_offset);
608 if (pp->p_fstype < FSMAXTYPES)
609 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]);
611 fprintf(f, "%8d", pp->p_fstype);
612 switch (pp->p_fstype) {
614 case FS_UNUSED: /* XXX */
615 fprintf(f, " %5lu %5lu %2s",
617 (u_long)(pp->p_fsize * pp->p_frag), "");
621 fprintf(f, " %5lu %5lu %5u",
623 (u_long)(pp->p_fsize * pp->p_frag),
628 fprintf(f, " %5lu %5lu %5d",
630 (u_long)(pp->p_fsize * pp->p_frag),
635 fprintf(f, "%20.20s", "");
639 fprintf(f, " # \"raw\" part, don't edit");
651 struct disklabel label;
654 if ((fd = mkstemp(tmpfil)) == -1 ||
655 (fp = fdopen(fd, "w")) == NULL) {
656 warnx("can't create %s", tmpfil);
664 fp = fopen(tmpfil, "r");
666 warnx("can't reopen %s for reading", tmpfil);
669 bzero((char *)&label, sizeof(label));
670 c = getasciilabel(fp, &label);
674 if (writelabel() == 0) {
675 (void) unlink(tmpfil);
679 printf("re-edit the label? [y]: ");
682 if (c != EOF && c != (int)'\n')
683 while (getchar() != (int)'\n')
688 (void) unlink(tmpfil);
701 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP));
702 while ((pid = fork()) < 0) {
703 if (errno == EPROCLIM) {
704 warnx("you have too many processes");
707 if (errno != EAGAIN) {
716 if (setresgid(gid, gid, gid) == -1)
719 if (setresuid(uid, uid, uid) == -1)
721 if ((ed = getenv("EDITOR")) == (char *)0)
723 execlp(ed, ed, tmpfil, (char *)0);
726 while ((xpid = wait(&locstat)) >= 0)
737 while (*cp != '\0' && isspace(*cp))
739 if (*cp == '\0' || *cp == '#')
749 while (*cp != '\0' && !isspace(*cp) && *cp != '#')
751 if ((c = *cp) != '\0') {
760 * Read an ascii label in from fd f,
761 * in the same format as that put out by display(),
765 getasciilabel(FILE *f, struct disklabel *lp)
770 char *tp, line[BUFSIZ];
772 int lineno = 0, errors = 0;
775 makelabel("auto", lp);
776 bzero(&part_set, sizeof(part_set));
777 bzero(&part_size_type, sizeof(part_size_type));
778 bzero(&part_offset_type, sizeof(part_offset_type));
779 lp->d_bbsize = BBSIZE; /* XXX */
780 lp->d_sbsize = 0; /* XXX */
781 while (fgets(line, sizeof(line) - 1, f)) {
783 if ((cp = strchr(line,'\n')) != NULL)
788 tp = strchr(cp, ':');
790 fprintf(stderr, "line %d: syntax error\n", lineno);
794 *tp++ = '\0', tp = skip(tp);
795 if (!strcmp(cp, "type")) {
799 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++)
800 if (*cpp && !strcmp(*cpp, tp)) {
801 lp->d_type = cpp - dktypenames;
804 if (cpp < &dktypenames[DKMAXTYPES])
807 v = strtoul(tp, &endp, 10);
808 if (errno != 0 || *endp != '\0')
811 fprintf(stderr, "line %d:%s %lu\n", lineno,
812 "Warning, unknown disk type", v);
817 if (!strcmp(cp, "flags")) {
818 for (v = 0; (cp = tp) && *cp != '\0';) {
820 if (!strcmp(cp, "removeable"))
822 else if (!strcmp(cp, "ecc"))
824 else if (!strcmp(cp, "badsect"))
828 "line %d: %s: bad flag\n",
836 if (!strcmp(cp, "drivedata")) {
837 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA;) {
838 lp->d_drivedata[i++] = strtoul(cp, NULL, 10);
843 if (sscanf(cp, "%lu partitions", &v) == 1) {
844 if (v > MAXPARTITIONS) {
846 "line %d: bad # of partitions\n", lineno);
847 lp->d_npartitions = MAXPARTITIONS;
849 } else if (v < DEFPARTITIONS) {
851 "line %d: bad # of partitions\n", lineno);
852 lp->d_npartitions = DEFPARTITIONS;
855 lp->d_npartitions = v;
860 if (!strcmp(cp, "disk")) {
861 strncpy(lp->d_typename, tp, sizeof (lp->d_typename));
864 if (!strcmp(cp, "label")) {
865 strncpy(lp->d_packname, tp, sizeof (lp->d_packname));
868 if (!strcmp(cp, "bytes/sector")) {
869 v = strtoul(tp, NULL, 10);
870 if (v == 0 || (v % DEV_BSIZE) != 0) {
872 "line %d: %s: bad sector size\n",
879 if (!strcmp(cp, "sectors/track")) {
880 v = strtoul(tp, NULL, 10);
881 #if (ULONG_MAX != 0xffffffffUL)
882 if (v == 0 || v > 0xffffffff)
887 fprintf(stderr, "line %d: %s: bad %s\n",
894 if (!strcmp(cp, "sectors/cylinder")) {
895 v = strtoul(tp, NULL, 10);
897 fprintf(stderr, "line %d: %s: bad %s\n",
904 if (!strcmp(cp, "tracks/cylinder")) {
905 v = strtoul(tp, NULL, 10);
907 fprintf(stderr, "line %d: %s: bad %s\n",
914 if (!strcmp(cp, "cylinders")) {
915 v = strtoul(tp, NULL, 10);
917 fprintf(stderr, "line %d: %s: bad %s\n",
921 lp->d_ncylinders = v;
924 if (!strcmp(cp, "sectors/unit")) {
925 v = strtoul(tp, NULL, 10);
927 fprintf(stderr, "line %d: %s: bad %s\n",
931 lp->d_secperunit = v;
934 if (!strcmp(cp, "rpm")) {
935 v = strtoul(tp, NULL, 10);
936 if (v == 0 || v > USHRT_MAX) {
937 fprintf(stderr, "line %d: %s: bad %s\n",
944 if (!strcmp(cp, "interleave")) {
945 v = strtoul(tp, NULL, 10);
946 if (v == 0 || v > USHRT_MAX) {
947 fprintf(stderr, "line %d: %s: bad %s\n",
951 lp->d_interleave = v;
954 if (!strcmp(cp, "trackskew")) {
955 v = strtoul(tp, NULL, 10);
957 fprintf(stderr, "line %d: %s: bad %s\n",
964 if (!strcmp(cp, "cylinderskew")) {
965 v = strtoul(tp, NULL, 10);
967 fprintf(stderr, "line %d: %s: bad %s\n",
974 if (!strcmp(cp, "headswitch")) {
975 v = strtoul(tp, NULL, 10);
976 lp->d_headswitch = v;
979 if (!strcmp(cp, "track-to-track seek")) {
980 v = strtoul(tp, NULL, 10);
984 /* the ':' was removed above */
985 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') {
987 "line %d: %s: Unknown disklabel field\n", lineno,
993 /* Process a partition specification line. */
995 if (part >= lp->d_npartitions) {
997 "line %d: partition name out of range a-%c: %s\n",
998 lineno, 'a' + lp->d_npartitions - 1, cp);
1004 if (getasciipartspec(tp, lp, part, lineno) != 0) {
1009 errors += checklabel(lp);
1010 return (errors == 0);
1013 #define NXTNUM(n) do { \
1015 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1018 cp = tp, tp = word(cp); \
1019 (n) = strtoul(cp, NULL, 10); \
1023 /* retain 1 character following number */
1024 #define NXTWORD(w,n) do { \
1026 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \
1030 cp = tp, tp = word(cp); \
1031 (n) = strtoul(cp, &tmp, 10); \
1032 if (tmp) (w) = *tmp; \
1037 * Read a partition line into partition `part' in the specified disklabel.
1038 * Return 0 on success, 1 on failure.
1041 getasciipartspec(char *tp, struct disklabel *lp, int part, int lineno)
1043 struct partition *pp;
1048 pp = &lp->d_partitions[part];
1052 NXTWORD(part_size_type[part],v);
1053 if (v == 0 && part_size_type[part] != '*') {
1055 "line %d: %s: bad partition size\n", lineno, cp);
1061 NXTWORD(part_offset_type[part],v);
1062 if (v == 0 && part_offset_type[part] != '*' &&
1063 part_offset_type[part] != '\0') {
1065 "line %d: %s: bad partition offset\n", lineno, cp);
1070 fprintf(stderr, "line %d: missing file system type\n", lineno);
1073 cp = tp, tp = word(cp);
1074 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++)
1075 if (*cpp && !strcmp(*cpp, cp))
1078 pp->p_fstype = cpp - fstypenames;
1082 v = strtoul(cp, &endp, 10);
1083 if (errno != 0 || *endp != '\0')
1087 if (v >= FSMAXTYPES) {
1089 "line %d: Warning, unknown file system type %s\n",
1096 switch (pp->p_fstype) {
1100 /* accept defaults for fsize/frag/cpg */
1102 NXTNUM(pp->p_fsize);
1103 if (pp->p_fsize == 0)
1106 pp->p_frag = v / pp->p_fsize;
1110 /* else default to 0's */
1119 * Check disklabel for errors and fill in
1120 * derived fields according to supplied values.
1123 checklabel(struct disklabel *lp)
1125 struct partition *pp;
1128 u_long base_offset, needed, total_size, total_percent, current_offset;
1130 int seen_default_offset;
1133 struct partition *pp2;
1140 if (lp->d_secsize == 0) {
1141 fprintf(stderr, "sector size 0\n");
1144 if (lp->d_nsectors == 0) {
1145 fprintf(stderr, "sectors/track 0\n");
1148 if (lp->d_ntracks == 0) {
1149 fprintf(stderr, "tracks/cylinder 0\n");
1152 if (lp->d_ncylinders == 0) {
1153 fprintf(stderr, "cylinders/unit 0\n");
1157 warnx("revolutions/minute 0");
1158 if (lp->d_secpercyl == 0)
1159 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks;
1160 if (lp->d_secperunit == 0)
1161 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders;
1162 if (lp->d_bbsize == 0) {
1163 fprintf(stderr, "boot block size 0\n");
1165 } else if (lp->d_bbsize % lp->d_secsize)
1166 warnx("boot block size %% sector-size != 0");
1167 if (lp->d_npartitions > MAXPARTITIONS) {
1168 warnx("number of partitions (%lu) > MAXPARTITIONS (%d)",
1169 (u_long)lp->d_npartitions, MAXPARTITIONS);
1172 if (lp->d_npartitions < DEFPARTITIONS) {
1173 warnx("number of partitions (%lu) < DEFPARTITIONS (%d)",
1174 (u_long)lp->d_npartitions, DEFPARTITIONS);
1178 struct disklabel *vl;
1180 vl = getvirginlabel();
1181 if (lp->d_secsize == 0)
1182 lp->d_secsize = vl->d_secsize;
1183 if (lp->d_nsectors == 0)
1184 lp->d_nsectors = vl->d_nsectors;
1185 if (lp->d_ntracks == 0)
1186 lp->d_ntracks = vl->d_ntracks;
1187 if (lp->d_ncylinders == 0)
1188 lp->d_ncylinders = vl->d_ncylinders;
1190 lp->d_rpm = vl->d_rpm;
1191 if (lp->d_interleave == 0)
1192 lp->d_interleave = vl->d_interleave;
1193 if (lp->d_secpercyl == 0)
1194 lp->d_secpercyl = vl->d_secpercyl;
1195 if (lp->d_secperunit == 0 ||
1196 lp->d_secperunit > vl->d_secperunit)
1197 lp->d_secperunit = vl->d_secperunit;
1198 if (lp->d_bbsize == 0)
1199 lp->d_bbsize = vl->d_bbsize;
1200 if (lp->d_npartitions < DEFPARTITIONS ||
1201 lp->d_npartitions > MAXPARTITIONS)
1202 lp->d_npartitions = vl->d_npartitions;
1206 /* first allocate space to the partitions, then offsets */
1207 total_size = 0; /* in sectors */
1208 total_percent = 0; /* in percent */
1210 /* find all fixed partitions */
1211 for (i = 0; i < lp->d_npartitions; i++) {
1212 pp = &lp->d_partitions[i];
1214 if (part_size_type[i] == '*') {
1215 if (i == RAW_PART) {
1216 pp->p_size = lp->d_secperunit;
1219 warnx("Too many '*' partitions (%c and %c)",
1220 hog_part + 'a',i + 'a');
1228 switch (part_size_type[i]) {
1230 total_percent += size;
1251 warnx("unknown multiplier suffix '%c' for partition %c (should be K, M, G or T)",
1252 part_size_type[i], i + 'a');
1255 /* don't count %'s yet */
1256 if (part_size_type[i] != '%') {
1258 * for all not in sectors, convert to
1261 if (part_size_type[i] != '\0') {
1262 if (size % lp->d_secsize != 0)
1263 warnx("partition %c not an integer number of sectors",
1265 size /= lp->d_secsize;
1268 /* else already in sectors */
1276 /* Find out the total free space, excluding the boot block area. */
1277 base_offset = BBSIZE / secsize;
1279 for (i = 0; i < lp->d_npartitions; i++) {
1280 pp = &lp->d_partitions[i];
1281 if (!part_set[i] || i == RAW_PART ||
1282 part_size_type[i] == '%' || part_size_type[i] == '*')
1284 if (pp->p_offset > base_offset)
1285 free_space += pp->p_offset - base_offset;
1286 if (pp->p_offset + pp->p_size > base_offset)
1287 base_offset = pp->p_offset + pp->p_size;
1289 if (base_offset < lp->d_secperunit)
1290 free_space += lp->d_secperunit - base_offset;
1292 /* handle % partitions - note %'s don't need to add up to 100! */
1293 if (total_percent != 0) {
1294 if (total_percent > 100) {
1295 fprintf(stderr,"total percentage %lu is greater than 100\n",
1300 if (free_space > 0) {
1301 for (i = 0; i < lp->d_npartitions; i++) {
1302 pp = &lp->d_partitions[i];
1303 if (part_set[i] && part_size_type[i] == '%') {
1304 /* careful of overflows! and integer roundoff */
1305 pp->p_size = ((double)pp->p_size/100) * free_space;
1306 total_size += pp->p_size;
1308 /* FIX we can lose a sector or so due to roundoff per
1309 partition. A more complex algorithm could avoid that */
1314 "%ld sectors available to give to '*' and '%%' partitions\n",
1317 /* fix? set all % partitions to size 0? */
1320 /* give anything remaining to the hog partition */
1321 if (hog_part != -1) {
1323 * Find the range of offsets usable by '*' partitions around
1324 * the hog partition and how much space they need.
1327 base_offset = BBSIZE / secsize;
1328 for (i = hog_part - 1; i >= 0; i--) {
1329 pp = &lp->d_partitions[i];
1330 if (!part_set[i] || i == RAW_PART)
1332 if (part_offset_type[i] == '*') {
1333 needed += pp->p_size;
1336 base_offset = pp->p_offset + pp->p_size;
1339 current_offset = lp->d_secperunit;
1340 for (i = lp->d_npartitions - 1; i > hog_part; i--) {
1341 pp = &lp->d_partitions[i];
1342 if (!part_set[i] || i == RAW_PART)
1344 if (part_offset_type[i] == '*') {
1345 needed += pp->p_size;
1348 current_offset = pp->p_offset;
1351 if (current_offset - base_offset <= needed) {
1352 fprintf(stderr, "Cannot find space for partition %c\n",
1355 "Need more than %lu sectors between %lu and %lu\n",
1356 needed, base_offset, current_offset);
1358 lp->d_partitions[hog_part].p_size = 0;
1360 lp->d_partitions[hog_part].p_size = current_offset -
1361 base_offset - needed;
1362 total_size += lp->d_partitions[hog_part].p_size;
1366 /* Now set the offsets for each partition */
1367 current_offset = BBSIZE / secsize; /* in sectors */
1368 seen_default_offset = 0;
1369 for (i = 0; i < lp->d_npartitions; i++) {
1371 pp = &lp->d_partitions[i];
1373 if (part_offset_type[i] == '*') {
1374 if (i == RAW_PART) {
1377 pp->p_offset = current_offset;
1378 seen_default_offset = 1;
1381 /* allow them to be out of order for old-style tables */
1382 if (pp->p_offset < current_offset &&
1383 seen_default_offset && i != RAW_PART &&
1384 pp->p_fstype != FS_VINUM) {
1386 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n",
1387 (long)pp->p_offset,i+'a',current_offset);
1389 "Labels with any *'s for offset must be in ascending order by sector\n");
1391 } else if (pp->p_offset != current_offset &&
1392 i != RAW_PART && seen_default_offset) {
1394 * this may give unneeded warnings if
1395 * partitions are out-of-order
1398 "Offset %ld for partition %c doesn't match expected value %ld",
1399 (long)pp->p_offset, i + 'a', current_offset);
1403 current_offset = pp->p_offset + pp->p_size;
1407 for (i = 0; i < lp->d_npartitions; i++) {
1409 pp = &lp->d_partitions[i];
1410 if (pp->p_size == 0 && pp->p_offset != 0)
1411 warnx("partition %c: size 0, but offset %lu",
1412 part, (u_long)pp->p_offset);
1414 if (pp->p_size % lp->d_secpercyl)
1415 warnx("partition %c: size %% cylinder-size != 0",
1417 if (pp->p_offset % lp->d_secpercyl)
1418 warnx("partition %c: offset %% cylinder-size != 0",
1421 if (pp->p_offset > lp->d_secperunit) {
1423 "partition %c: offset past end of unit\n", part);
1426 if (pp->p_offset + pp->p_size > lp->d_secperunit) {
1428 "partition %c: partition extends past end of unit\n",
1432 if (i == RAW_PART) {
1433 if (pp->p_fstype != FS_UNUSED)
1434 warnx("partition %c is not marked as unused!",part);
1435 if (pp->p_offset != 0)
1436 warnx("partition %c doesn't start at 0!",part);
1437 if (pp->p_size != lp->d_secperunit)
1438 warnx("partition %c doesn't cover the whole unit!",part);
1440 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) ||
1441 (pp->p_size != lp->d_secperunit)) {
1442 warnx("An incorrect partition %c may cause problems for "
1443 "standard system utilities",part);
1447 /* check for overlaps */
1448 /* this will check for all possible overlaps once and only once */
1449 for (j = 0; j < i; j++) {
1450 pp2 = &lp->d_partitions[j];
1451 if (j != RAW_PART && i != RAW_PART &&
1452 pp->p_fstype != FS_VINUM &&
1453 pp2->p_fstype != FS_VINUM &&
1454 part_set[i] && part_set[j]) {
1455 if (pp2->p_offset < pp->p_offset + pp->p_size &&
1456 (pp2->p_offset + pp2->p_size > pp->p_offset ||
1457 pp2->p_offset >= pp->p_offset)) {
1458 fprintf(stderr,"partitions %c and %c overlap!\n",
1465 for (; i < lp->d_npartitions; i++) {
1467 pp = &lp->d_partitions[i];
1468 if (pp->p_size || pp->p_offset)
1469 warnx("unused partition %c: size %d offset %lu",
1470 'a' + i, pp->p_size, (u_long)pp->p_offset);
1476 * When operating on a "virgin" disk, try getting an initial label
1477 * from the associated device driver. This might work for all device
1478 * drivers that are able to fetch some initial device parameters
1479 * without even having access to a (BSD) disklabel, like SCSI disks,
1480 * most IDE drives, or vn devices.
1482 * The device name must be given in its "canonical" form.
1484 static struct disklabel *
1485 getvirginlabel(void)
1487 static struct disklabel loclab;
1488 struct partition *dp;
1492 if ((f = open(specname, O_RDONLY)) == -1) {
1493 warn("cannot open %s", specname);
1500 mediasize = g_mediasize(f);
1501 secsize = g_sectorsize(f);
1502 if (secsize < 0 || mediasize < 0) {
1507 memset(&loclab, 0, sizeof loclab);
1508 loclab.d_magic = DISKMAGIC;
1509 loclab.d_magic2 = DISKMAGIC;
1510 loclab.d_secsize = secsize;
1511 loclab.d_secperunit = mediasize / secsize;
1514 * Nobody in these enlightened days uses the CHS geometry for
1515 * anything, but nonetheless try to get it right. If we fail
1516 * to get any good ideas from the device, construct something
1517 * which is IBM-PC friendly.
1519 if (ioctl(f, DIOCGFWSECTORS, &u) == 0)
1520 loclab.d_nsectors = u;
1522 loclab.d_nsectors = 63;
1523 if (ioctl(f, DIOCGFWHEADS, &u) == 0)
1524 loclab.d_ntracks = u;
1525 else if (loclab.d_secperunit <= 63*1*1024)
1526 loclab.d_ntracks = 1;
1527 else if (loclab.d_secperunit <= 63*16*1024)
1528 loclab.d_ntracks = 16;
1530 loclab.d_ntracks = 255;
1531 loclab.d_secpercyl = loclab.d_ntracks * loclab.d_nsectors;
1532 loclab.d_ncylinders = loclab.d_secperunit / loclab.d_secpercyl;
1533 loclab.d_npartitions = DEFPARTITIONS;
1535 /* Various (unneeded) compat stuff */
1536 loclab.d_rpm = 3600;
1537 loclab.d_bbsize = BBSIZE;
1538 loclab.d_interleave = 1;
1539 strncpy(loclab.d_typename, "amnesiac",
1540 sizeof(loclab.d_typename));
1542 dp = &loclab.d_partitions[RAW_PART];
1543 dp->p_size = loclab.d_secperunit;
1544 loclab.d_checksum = dkcksum(&loclab);
1554 "%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",
1555 "usage: bsdlabel disk",
1556 "\t\t(to read label)",
1557 " bsdlabel -w [-n] [-m machine] disk [type]",
1558 "\t\t(to write label with existing boot program)",
1559 " bsdlabel -e [-n] [-m machine] disk",
1560 "\t\t(to edit label)",
1561 " bsdlabel -R [-n] [-m machine] disk protofile",
1562 "\t\t(to restore label with existing boot program)",
1563 " bsdlabel -B [-b boot] [-m machine] disk",
1564 "\t\t(to install boot program with existing on-disk label)",
1565 " bsdlabel -w -B [-n] [-b boot] [-m machine] disk [type]",
1566 "\t\t(to write label and install boot program)",
1567 " bsdlabel -R -B [-n] [-b boot] [-m machine] disk protofile",
1568 "\t\t(to restore label and install boot program)"