2 * Mach Operating System
3 * Copyright (c) 1992 Carnegie Mellon University
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
16 * Carnegie Mellon requests users of this software to return to
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 #include <sys/disklabel.h>
32 #include <sys/diskpc98.h>
33 #include <sys/param.h>
35 #include <sys/mount.h>
52 static char lbuf[LBUF];
56 * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
58 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
59 * Copyright (c) 1989 Robert. V. Baron
63 #define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp
64 #define String(str, ans, len) {char *z = ans; char **dflt = &z; if (string(str, dflt)) strncpy(ans, *dflt, len); }
66 #define MAX_SEC_SIZE 2048 /* maximum section size that is supported */
67 #define MIN_SEC_SIZE 512 /* the sector size to start sensing at */
68 static int secsize = 0; /* the sensed sector size */
72 static int cyls, sectors, heads, cylsecs, disksecs;
75 unsigned char padding[2]; /* force the longs to be long aligned */
76 unsigned char bootinst[510];
77 unsigned short int signature;
78 struct pc98_partition parts[8];
79 unsigned char large_sector_overflow[MAX_SEC_SIZE-MIN_SEC_SIZE];
82 static struct mboot mboot;
86 static uint dos_heads;
87 static uint dos_sectors;
88 static uint dos_cylsecs;
101 static int B_flag = 0; /* replace boot code */
102 static int I_flag = 0; /* Inizialize disk to defaults */
103 static int a_flag = 0; /* set active partition */
104 static int i_flag = 0; /* replace partition data */
105 static int u_flag = 0; /* update partition data */
106 static int s_flag = 0; /* Print a summary and exit */
107 static int t_flag = 0; /* test only */
108 static char *f_flag = NULL; /* Read config info from file */
109 static int v_flag = 0; /* Be verbose */
111 static struct part_type
117 ,{0x01, "Primary DOS with 12 bit FAT"}
123 ,{0x02, "XENIX / file system"}
124 ,{0x03, "XENIX /usr file system"}
126 ,{0x05, "Extended DOS"}
127 ,{0x06, "Primary 'big' DOS (> 32MB)"}
128 ,{0x07, "OS/2 HPFS, QNX or Advanced UNIX"}
129 ,{0x08, "AIX file system"}
130 ,{0x09, "AIX boot partition or Coherent"}
131 ,{0x0A, "OS/2 Boot Manager or OPUS"}
133 ,{0x14, "FreeBSD/NetBSD/386BSD"}
134 ,{0x94, "FreeBSD/NetBSD/386BSD"}
138 ,{0x52, "CP/M or Microport SysV/AT"}
141 ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"}
142 ,{0x64, "Novell Netware 2.xx"}
143 ,{0x65, "Novell Netware 3.xx"}
148 static void print_s0(int which);
149 static void print_part(int i);
150 static void init_sector0(unsigned long start);
151 static void init_boot(void);
152 static void change_part(int i, int force);
153 static void print_params(void);
154 static void change_active(int which);
155 static void change_code(void);
156 static void get_params_to_use(void);
157 static char *get_rootdisk(void);
158 static void dos(u_int32_t start, u_int32_t size, struct pc98_partition *partp);
159 static int open_disk(int flag);
160 static ssize_t read_disk(off_t sector, void *buf);
161 static int write_disk(off_t sector, void *buf);
162 static int get_params(void);
163 static int read_s0(void);
164 static int write_s0(void);
165 static int ok(const char *str);
166 static int decimal(const char *str, int *num, int deflt);
167 static const char *get_type(int type);
168 static void usage(void);
169 static int string(const char *str, char **ans);
170 static void reset_boot(void);
173 main(int argc, char *argv[])
178 struct pc98_partition *partp;
180 while ((c = getopt(argc, argv, "BIa:f:istuv12345678")) != -1)
222 if (f_flag || i_flag)
230 disk = get_rootdisk();
232 if (stat(argv[0], &sb) == 0) {
233 /* OK, full pathname given */
235 } else if (errno == ENOENT && argv[0][0] != '/') {
236 /* Try prepending "/dev" */
237 asprintf(&disk, "%s%s", _PATH_DEV, argv[0]);
239 errx(1, "out of memory");
241 /* other stat error, let it fail below */
245 if (open_disk(u_flag) < 0)
246 err(1, "cannot open disk %s", disk);
251 printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads,
253 printf("Part %11s %11s %4s %4s %-16s\n", "Start", "Size", "MID",
255 for (i = 0; i < PC98_NPARTS; i++) {
256 partp = ((struct pc98_partition *) &mboot.parts) + i;
257 if (partp->dp_sid == 0)
259 printf("%4d: %11u %11u 0x%02x 0x%02x %-16.16s\n", i + 1,
260 partp->dp_scyl * cylsecs,
261 (partp->dp_ecyl - partp->dp_scyl + 1) * cylsecs,
262 partp->dp_mid, partp->dp_sid, partp->dp_name);
267 printf("******* Working on device %s *******\n",disk);
272 partp = (struct pc98_partition *) (&mboot.parts[0]);
273 partp->dp_mid = DOSMID_386BSD;
274 partp->dp_sid = DOSSID_386BSD;
275 strncpy(partp->dp_name, "FreeBSD", sizeof(partp->dp_name));
277 partp->dp_scyl = partp->dp_ipl_cyl = 1;
278 partp->dp_shd = partp->dp_ipl_head = 1;
279 partp->dp_ssect = partp->dp_ipl_sct = 0;
282 partp->dp_ecyl = dos_cyls - 1;
283 partp->dp_ehd = dos_cylsecs / dos_sectors;
284 partp->dp_esect = dos_sectors;
305 init_sector0(dos_sectors);
307 printf("Media sector size is %d\n", secsize);
308 printf("Warning: BIOS sector numbering starts with sector 1\n");
309 printf("Information from DOS bootblock is:\n");
311 for (i = 1; i <= PC98_NPARTS; i++)
312 change_part(i, v_flag);
314 change_part(partition, 1);
316 if (u_flag || a_flag)
317 change_active(partition);
322 if (u_flag || a_flag || B_flag) {
324 printf("\nWe haven't changed the partition table yet. ");
325 printf("This is your last chance.\n");
329 if (ok("Should we write new partition table?"))
332 printf("\n-t flag specified -- partition table not written.\n");
343 fprintf(stderr, "%s%s",
344 "usage: fdisk [-BIaistu] [-12345678] [disk]\n",
345 " fdisk -f configfile [-itv] [disk]\n");
349 static struct pc98_partition mtpart;
354 struct pc98_partition *partp;
356 partp = ((struct pc98_partition *) &mboot.parts) + i - 1;
357 return (bcmp(partp, &mtpart, sizeof (struct pc98_partition)) == 0);
366 printf("Information from DOS bootblock is:\n");
368 for (i = 1; i <= PC98_NPARTS; i++)
369 if (v_flag || !part_unused(i)) {
381 struct pc98_partition *partp;
382 u_int64_t part_sz, part_mb;
384 if (part_unused(i)) {
385 printf("<UNUSED>\n");
389 * Be careful not to overflow.
391 partp = ((struct pc98_partition *) &mboot.parts) + i - 1;
392 part_sz = (partp->dp_ecyl - partp->dp_scyl + 1) * cylsecs;
393 part_mb = part_sz * secsize;
394 part_mb /= (1024 * 1024);
395 printf("sysmid %d (%#04x),(%s)\n", partp->dp_mid, partp->dp_mid,
396 get_type(partp->dp_mid));
397 printf(" start %lu, size %lu (%ju Meg), sid %d\n",
398 (u_long)(partp->dp_scyl * cylsecs), (u_long)part_sz,
399 (uintmax_t)part_mb, partp->dp_sid);
400 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n"
407 printf ("\tsystem Name %.16s\n", partp->dp_name);
415 mboot.signature = PC98_MAGIC;
420 init_sector0(unsigned long start)
422 struct pc98_partition *partp =
423 (struct pc98_partition *)(&mboot.parts[0]);
427 partp->dp_mid = DOSMID_386BSD;
428 partp->dp_sid = DOSSID_386BSD;
430 dos(start, disksecs - start, partp);
434 change_part(int i, int force)
436 struct pc98_partition *partp =
437 ((struct pc98_partition *) &mboot.parts) + i - 1;
439 if (!force && part_unused(i))
442 printf("The data for partition %d is:\n", i);
445 if (u_flag && ok("Do you want to change it?")) {
449 bzero((char *)partp, sizeof (struct pc98_partition));
452 printf("\nThe static data for the slice 1 has been reinitialized to:\n");
457 int x_start = partp->dp_scyl * cylsecs ;
458 int x_size = (partp->dp_ecyl - partp->dp_scyl + 1) * cylsecs;
459 Decimal("sysmid", partp->dp_mid, tmp);
460 Decimal("syssid", partp->dp_sid, tmp);
461 String ("system name", partp->dp_name, 16);
462 Decimal("start", x_start, tmp);
463 Decimal("size", x_size, tmp);
465 if (ok("Explicitly specify beg/end address ?"))
468 tcyl = partp->dp_scyl;
470 tsec = partp->dp_ssect;
471 Decimal("beginning cylinder", tcyl, tmp);
472 Decimal("beginning head", thd, tmp);
473 Decimal("beginning sector", tsec, tmp);
474 partp->dp_scyl = tcyl;
475 partp->dp_ssect = tsec;
477 partp->dp_ipl_cyl = partp->dp_scyl;
478 partp->dp_ipl_sct = partp->dp_ssect;
479 partp->dp_ipl_head = partp->dp_shd;
481 tcyl = partp->dp_ecyl;
483 tsec = partp->dp_esect;
484 Decimal("ending cylinder", tcyl, tmp);
485 Decimal("ending head", thd, tmp);
486 Decimal("ending sector", tsec, tmp);
487 partp->dp_ecyl = tcyl;
488 partp->dp_esect = tsec;
491 dos(x_start, x_size, partp);
494 } while (!ok("Are we happy with this entry?"));
501 printf("parameters extracted from in-core disklabel are:\n");
502 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
503 ,cyls,heads,sectors,cylsecs);
504 if (dos_cyls > 65535 || dos_heads > 255 || dos_sectors > 255)
505 printf("Figures below won't work with BIOS for partitions not in cyl 1\n");
506 printf("parameters to be used for BIOS calculations are:\n");
507 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
508 ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
512 change_active(int which)
514 struct pc98_partition *partp = &mboot.parts[0];
515 int active, i, new, tmp;
518 for (i = 0; i < PC98_NPARTS; i++) {
519 if ((partp[i].dp_sid & PC98_SID_ACTIVE) == 0)
521 printf("Partition %d is marked active\n", i + 1);
525 if (a_flag && which != -1)
527 else if (active == -1)
530 if (!ok("Do you want to change the active partition?"))
535 Decimal("active partition", new, tmp);
536 if (new < 1 || new > 8) {
537 printf("Active partition number must be in range 1-8."
542 } while (!ok("Are you happy with this choice"));
543 if (active > 0 && active <= 8)
544 partp[active-1].dp_sid |= PC98_SID_ACTIVE;
550 if (ok("Do you want to change the boot code?"))
559 if (ok("Do you want to change our idea of what BIOS thinks ?"))
563 Decimal("BIOS's idea of #cylinders", dos_cyls, tmp);
564 Decimal("BIOS's idea of #heads", dos_heads, tmp);
565 Decimal("BIOS's idea of #sectors", dos_sectors, tmp);
566 dos_cylsecs = dos_heads * dos_sectors;
569 while(!ok("Are you happy with this choice"));
574 /***********************************************\
575 * Change real numbers into strange dos numbers *
576 \***********************************************/
578 dos(u_int32_t start, u_int32_t size, struct pc98_partition *partp)
582 if (partp->dp_mid == 0 && partp->dp_sid == 0 &&
583 start == 0 && size == 0) {
584 memcpy(partp, &mtpart, sizeof(*partp));
589 partp->dp_scyl = partp->dp_ipl_cyl = start / dos_cylsecs;
590 partp->dp_shd = partp->dp_ipl_head = start % dos_cylsecs / dos_sectors;
591 partp->dp_ssect = partp->dp_ipl_sct = start % dos_sectors;
594 end = start + size - cylsecs;
595 partp->dp_ecyl = end / dos_cylsecs;
596 partp->dp_ehd = end % dos_cylsecs / dos_sectors;
597 partp->dp_esect = end % dos_sectors;
606 if (stat(disk, &st) == -1) {
609 warnx("can't get file status of %s", disk);
612 if ( !(st.st_mode & S_IFCHR) )
613 warnx("device %s is not character special", disk);
614 rwmode = I_flag || a_flag || B_flag || flag ? O_RDWR : O_RDONLY;
615 fd = open(disk, rwmode);
616 if (fd == -1 && errno == EPERM && rwmode == O_RDWR)
617 fd = open(disk, O_RDONLY);
618 if (fd == -1 && errno == ENXIO)
621 warnx("can't open device %s", disk);
624 if (get_params() == -1) {
625 warnx("can't get disk parameters on %s", disk);
632 read_disk(off_t sector, void *buf)
635 lseek(fd, (sector * 512), 0);
637 secsize > MIN_SEC_SIZE ? secsize : MIN_SEC_SIZE * 2);
641 write_disk(off_t sector, void *buf)
644 struct gctl_req *grq;
649 sz = secsize > MIN_SEC_SIZE ? secsize : MIN_SEC_SIZE * 2;
650 grq = gctl_get_handle();
651 gctl_ro_param(grq, "verb", -1, "write PC98");
652 gctl_ro_param(grq, "class", -1, "PC98");
653 q = strrchr(disk, '/');
658 gctl_ro_param(grq, "geom", -1, q);
659 gctl_ro_param(grq, "data", sz, buf);
665 warnx("Geom problem: %s", q);
668 warnx("Warning: Partitioning via geom failed, trying raw write");
669 error = pwrite(fd, buf, sz, sector * 512);
673 for (i = 0; i < PC98_NPARTS; i++) {
674 sprintf(fbuf, "%ss%d", disk, i + 1);
675 fdw = open(fbuf, O_RDWR, 0);
678 error = ioctl(fdw, DIOCSPC98, buf);
683 warnx("Failed to write sector zero");
694 error = ioctl(fd, DIOCGFWSECTORS, &u);
696 sectors = dos_sectors = u;
698 sectors = dos_sectors = 17;
700 error = ioctl(fd, DIOCGFWHEADS, &u);
702 heads = dos_heads = u;
704 heads = dos_heads = 8;
706 dos_cylsecs = cylsecs = heads * sectors;
707 disksecs = cyls * heads * sectors;
709 error = ioctl(fd, DIOCGSECTORSIZE, &u);
710 if (error != 0 || u == 0)
714 error = ioctl(fd, DIOCGMEDIASIZE, &o);
717 cyls = dos_cyls = o / (u * dos_heads * dos_sectors);
728 if (read_disk(0, (char *) mboot.bootinst) == -1) {
729 warnx("can't read fdisk partition table");
732 if (mboot.signature != PC98_MAGIC) {
733 warnx("invalid fdisk partition table found");
734 /* So should we initialize things */
751 * write enable label sector before write (if necessary),
752 * disable after writing.
753 * needed if the disklabel protected area also protects
754 * sector 0. (e.g. empty disk)
756 if (write_disk(0, (char *) mboot.bootinst) == -1) {
757 warn("can't write fdisk partition table");
768 printf("%s [n] ", str);
770 if (fgets(lbuf, LBUF, stdin) == NULL)
772 lbuf[strlen(lbuf)-1] = 0;
775 (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") ||
776 !strcmp(lbuf, "y") || !strcmp(lbuf, "Y")))
783 decimal(const char *str, int *num, int deflt)
789 printf("Supply a decimal value for \"%s\" [%d] ", str, deflt);
791 if (fgets(lbuf, LBUF, stdin) == NULL)
793 lbuf[strlen(lbuf)-1] = 0;
799 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
802 while ((c = *cp++)) {
803 if (c <= '9' && c >= '0')
804 acc = acc * 10 + c - '0';
808 if (c == ' ' || c == '\t')
809 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
814 printf("%s is an invalid decimal number. Try again.\n",
821 string(const char *str, char **ans)
827 printf("Supply a string value for \"%s\" [%s] ", str, *ans);
828 fgets(lbuf, LBUF, stdin);
829 lbuf[strlen(lbuf)-1] = 0;
834 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
838 while ((c = *cp) && c != '"') cp++;
841 while ((c = *cp) && c != ' ' && c != '\t') cp++;
844 for (i = strlen(*ans); i < 16; i++)
857 for (i = 0; i < nitems(part_types); i++)
858 if (part_types[i].type == (type & 0x7f))
859 return(part_types[i].name);
864 * Try figuring out the root device's canonical disk name.
865 * The following choices are considered:
866 * /dev/ad0s1a => /dev/ad0
867 * /dev/da0a => /dev/da0
868 * /dev/vinum/root => /dev/vinum/root
873 struct statfs rootfs;
876 regmatch_t rm[NMATCHES];
880 if (statfs("/", &rootfs) == -1)
881 err(1, "statfs(\"/\")");
883 if ((rv = regcomp(&re, "^(/dev/[a-z]+[0-9]+)([sp][0-9]+)?[a-h]?$",
885 errx(1, "regcomp() failed (%d)", rv);
886 if ((rv = regexec(&re, rootfs.f_mntfromname, NMATCHES, rm, 0)) != 0)
888 "mounted root fs resource doesn't match expectations (regexec returned %d)",
890 if ((s = malloc(rm[1].rm_eo - rm[1].rm_so + 1)) == NULL)
891 errx(1, "out of memory");
892 memcpy(s, rootfs.f_mntfromname + rm[1].rm_so,
893 rm[1].rm_eo - rm[1].rm_so);
894 s[rm[1].rm_eo - rm[1].rm_so] = 0;
903 struct pc98_partition *partp;
906 for (i = 1; i <= PC98_NPARTS; i++) {
907 partp = ((struct pc98_partition *) &mboot.parts) + i - 1;
908 bzero((char *)partp, sizeof (struct pc98_partition));