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/diskmbr.h>
33 #include <sys/endian.h>
34 #include <sys/param.h>
36 #include <sys/mount.h>
53 static char lbuf[LBUF];
57 * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
59 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
60 * Copyright (c) 1989 Robert. V. Baron
64 #define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp
66 #define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs)
68 #define MAX_SEC_SIZE 2048 /* maximum section size that is supported */
69 #define MIN_SEC_SIZE 512 /* the sector size to start sensing at */
70 static int secsize = 0; /* the sensed sector size */
74 static int cyls, sectors, heads, cylsecs, disksecs;
77 unsigned char padding[2]; /* force the longs to be long aligned */
78 unsigned char *bootinst; /* boot code */
80 struct dos_partition parts[NDOSPART];
83 static struct mboot mboot;
89 static uint dos_heads;
90 static uint dos_sectors;
91 static uint dos_cylsecs;
93 #define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0))
94 #define DOSCYL(c) (c & 0xff)
98 static int current_line_number;
100 static int geom_processed = 0;
101 static int part_processed = 0;
102 static int active_processed = 0;
113 static int B_flag = 0; /* replace boot code */
114 static int I_flag = 0; /* use entire disk for FreeBSD */
115 static int a_flag = 0; /* set active partition */
116 static char *b_flag = NULL; /* path to boot code */
117 static int i_flag = 0; /* replace partition data */
118 static int q_flag = 0; /* Be quiet */
119 static int u_flag = 0; /* update partition data */
120 static int s_flag = 0; /* Print a summary and exit */
121 static int t_flag = 0; /* test only */
122 static char *f_flag = NULL; /* Read config info from file */
123 static int v_flag = 0; /* Be verbose */
124 static int print_config_flag = 0;
126 static struct part_type
132 ,{0x01, "Primary DOS with 12 bit FAT"}
133 ,{0x02, "XENIX / file system"}
134 ,{0x03, "XENIX /usr file system"}
135 ,{0x04, "Primary DOS with 16 bit FAT (< 32MB)"}
136 ,{0x05, "Extended DOS"}
137 ,{0x06, "Primary 'big' DOS (>= 32MB)"}
138 ,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"}
139 ,{0x08, "AIX file system or SplitDrive"}
140 ,{0x09, "AIX boot partition or Coherent"}
141 ,{0x0A, "OS/2 Boot Manager, OPUS or Coherent swap"}
142 ,{0x0B, "DOS or Windows 95 with 32 bit FAT"}
143 ,{0x0C, "DOS or Windows 95 with 32 bit FAT (LBA)"}
144 ,{0x0E, "Primary 'big' DOS (>= 32MB, LBA)"}
145 ,{0x0F, "Extended DOS (LBA)"}
147 ,{0x11, "OS/2 BM: hidden DOS with 12-bit FAT"}
148 ,{0x12, "Compaq diagnostics"}
149 ,{0x14, "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)"}
150 ,{0x16, "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)"}
151 ,{0x17, "OS/2 BM: hidden IFS (e.g. HPFS)"}
152 ,{0x18, "AST Windows swapfile"}
154 ,{0x3C, "PartitionMagic recovery"}
157 ,{0x41, "Linux/MINIX (sharing disk with DRDOS)"}
158 ,{0x42, "SFS or Linux swap (sharing disk with DRDOS)"}
159 ,{0x43, "Linux native (sharing disk with DRDOS)"}
160 ,{0x4D, "QNX 4.2 Primary"}
161 ,{0x4E, "QNX 4.2 Secondary"}
162 ,{0x4F, "QNX 4.2 Tertiary"}
163 ,{0x50, "DM (disk manager)"}
164 ,{0x51, "DM6 Aux1 (or Novell)"}
165 ,{0x52, "CP/M or Microport SysV/AT"}
168 ,{0x55, "EZ-Drive (disk manager)"}
169 ,{0x56, "Golden Bow (disk manager)"}
170 ,{0x5c, "Priam Edisk (disk manager)"} /* according to S. Widlake */
172 ,{0x63, "System V/386 (such as ISC UNIX), GNU HURD or Mach"}
173 ,{0x64, "Novell Netware/286 2.xx"}
174 ,{0x65, "Novell Netware/386 3.xx"}
175 ,{0x70, "DiskSecure Multi-Boot"}
178 ,{0x78, "QNX4.x 2nd part"}
179 ,{0x79, "QNX4.x 3rd part"}
180 ,{0x80, "Minix until 1.4a"}
181 ,{0x81, "Minix since 1.4b, early Linux partition or Mitac disk manager"}
182 ,{0x82, "Linux swap or Solaris x86"}
183 ,{0x83, "Linux native"}
184 ,{0x84, "OS/2 hidden C: drive"}
185 ,{0x85, "Linux extended"}
186 ,{0x86, "NTFS volume set??"}
187 ,{0x87, "NTFS volume set??"}
188 ,{0x93, "Amoeba file system"}
189 ,{0x94, "Amoeba bad block table"}
191 ,{0xA0, "Suspend to Disk"}
192 ,{0xA5, "FreeBSD/NetBSD/386BSD"}
198 ,{0xB7, "BSDI BSD/386 file system"}
199 ,{0xB8, "BSDI BSD/386 swap"}
200 ,{0xBE, "Solaris x86 boot"}
201 ,{0xBF, "Solaris x86 (new)"}
202 ,{0xC1, "DRDOS/sec with 12-bit FAT"}
203 ,{0xC4, "DRDOS/sec with 16-bit FAT (< 32MB)"}
204 ,{0xC6, "DRDOS/sec with 16-bit FAT (>= 32MB)"}
206 ,{0xDB, "CP/M, Concurrent CP/M, Concurrent DOS or CTOS"}
207 ,{0xE1, "DOS access or SpeedStor with 12-bit FAT extended partition"}
208 ,{0xE3, "DOS R/O or SpeedStor"}
209 ,{0xE4, "SpeedStor with 16-bit FAT extended partition < 1024 cyl."}
210 ,{0xEB, "BeOS file system"}
212 ,{0xEF, "EFI System Partition"}
214 ,{0xF2, "DOS 3.3+ Secondary"}
215 ,{0xF4, "SpeedStor large partition"}
216 ,{0xFE, "SpeedStor >1024 cyl. or LANstep"}
217 ,{0xFF, "Xenix bad blocks table"}
220 static void print_s0(int which);
221 static void print_part(int i);
222 static void init_sector0(unsigned long start);
223 static void init_boot(void);
224 static void change_part(int i);
225 static void print_params(void);
226 static void change_active(int which);
227 static void change_code(void);
228 static void get_params_to_use(void);
229 static char *get_rootdisk(void);
230 static void dos(struct dos_partition *partp);
231 static int open_disk(int flag);
232 static ssize_t read_disk(off_t sector, void *buf);
233 static int write_disk(off_t sector, void *buf);
234 static int get_params(void);
235 static int read_s0(void);
236 static int write_s0(void);
237 static int ok(const char *str);
238 static int decimal(const char *str, int *num, int deflt);
239 static const char *get_type(int type);
240 static int read_config(char *config_file);
241 static void reset_boot(void);
242 static int sanitize_partition(struct dos_partition *);
243 static void usage(void);
246 main(int argc, char *argv[])
250 struct dos_partition *partp;
252 while ((c = getopt(argc, argv, "BIab:f:ipqstuv1234")) != -1)
273 print_config_flag = 1;
299 if (f_flag || i_flag)
307 disk = get_rootdisk();
309 disk = g_device_path(argv[0]);
311 err(1, "unable to get correct path for %s\n", argv[0]);
313 if (open_disk(u_flag) < 0)
314 err(1, "cannot open disk %s", disk);
316 /* (abu)use mboot.bootinst to probe for the sector size */
317 if ((mboot.bootinst = malloc(MAX_SEC_SIZE)) == NULL)
318 err(1, "cannot allocate buffer to determine disk sector size");
319 if (read_disk(0, mboot.bootinst) == -1)
320 errx(1, "could not detect sector size");
321 free(mboot.bootinst);
322 mboot.bootinst = NULL;
324 if (print_config_flag) {
328 printf("# %s\n", disk);
329 printf("g c%d h%d s%d\n", dos_cyls, dos_heads, dos_sectors);
331 for (i = 0; i < NDOSPART; i++) {
332 partp = ((struct dos_partition *)&mboot.parts) + i;
334 if (partp->dp_start == 0 && partp->dp_size == 0)
337 printf("p %d 0x%02x %lu %lu\n", i + 1, partp->dp_typ,
338 (u_long)partp->dp_start, (u_long)partp->dp_size);
340 /* Fill flags for the partition. */
341 if (partp->dp_flag & 0x80)
342 printf("a %d\n", i + 1);
349 printf("%s: %d cyl %d hd %d sec\n", disk, dos_cyls, dos_heads,
351 printf("Part %11s %11s Type Flags\n", "Start", "Size");
352 for (i = 0; i < NDOSPART; i++) {
353 partp = ((struct dos_partition *) &mboot.parts) + i;
354 if (partp->dp_start == 0 && partp->dp_size == 0)
356 printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i + 1,
357 (u_long) partp->dp_start,
358 (u_long) partp->dp_size, partp->dp_typ,
364 printf("******* Working on device %s *******\n",disk);
369 partp = (struct dos_partition *) (&mboot.parts[0]);
370 partp->dp_typ = DOSPTYP_386BSD;
371 partp->dp_flag = ACTIVE;
372 partp->dp_start = dos_sectors;
373 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs -
383 if (read_s0() || i_flag)
385 if (!read_config(f_flag))
398 init_sector0(dos_sectors);
400 printf("Media sector size is %d\n", secsize);
401 printf("Warning: BIOS sector numbering starts with sector 1\n");
402 printf("Information from DOS bootblock is:\n");
404 for (i = 1; i <= NDOSPART; i++)
407 change_part(partition);
409 if (u_flag || a_flag)
410 change_active(partition);
415 if (u_flag || a_flag || B_flag) {
417 printf("\nWe haven't changed the partition table yet. ");
418 printf("This is your last chance.\n");
422 if (ok("Should we write new partition table?"))
425 printf("\n-t flag specified -- partition table not written.\n");
436 fprintf(stderr, "%s%s",
437 "usage: fdisk [-BIaipqstu] [-b bootcode] [-1234] [disk]\n",
438 " fdisk -f configfile [-itv] [disk]\n");
448 printf("Information from DOS bootblock is:\n");
450 for (i = 1; i <= NDOSPART; i++)
451 printf("%d: ", i), print_part(i);
456 static struct dos_partition mtpart;
461 struct dos_partition *partp;
464 partp = ((struct dos_partition *) &mboot.parts) + i - 1;
466 if (!bcmp(partp, &mtpart, sizeof (struct dos_partition))) {
467 printf("<UNUSED>\n");
471 * Be careful not to overflow.
473 part_mb = partp->dp_size;
475 part_mb /= (1024 * 1024);
476 printf("sysid %d (%#04x),(%s)\n", partp->dp_typ, partp->dp_typ,
477 get_type(partp->dp_typ));
478 printf(" start %lu, size %lu (%ju Meg), flag %x%s\n",
479 (u_long)partp->dp_start,
480 (u_long)partp->dp_size,
483 partp->dp_flag == ACTIVE ? " (active)" : "");
484 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n"
485 ,DPCYL(partp->dp_scyl, partp->dp_ssect)
487 ,DPSECT(partp->dp_ssect)
488 ,DPCYL(partp->dp_ecyl, partp->dp_esect)
490 ,DPSECT(partp->dp_esect));
502 fname = b_flag ? b_flag : "/boot/mbr";
503 if ((fdesc = open(fname, O_RDONLY)) == -1 ||
504 fstat(fdesc, &sb) == -1)
506 if ((mboot.bootinst_size = sb.st_size) % secsize != 0)
507 errx(1, "%s: length must be a multiple of sector size", fname);
508 if (mboot.bootinst != NULL)
509 free(mboot.bootinst);
510 if ((mboot.bootinst = malloc(mboot.bootinst_size = sb.st_size)) == NULL)
511 errx(1, "%s: unable to allocate read buffer", fname);
512 if ((n = read(fdesc, mboot.bootinst, mboot.bootinst_size)) == -1 ||
515 if (n != mboot.bootinst_size)
516 errx(1, "%s: short read", fname);
518 if (mboot.bootinst != NULL)
519 free(mboot.bootinst);
520 mboot.bootinst_size = secsize;
521 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL)
522 errx(1, "unable to allocate boot block buffer");
523 memset(mboot.bootinst, 0, mboot.bootinst_size);
524 le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC);
530 init_sector0(unsigned long start)
532 struct dos_partition *partp = (struct dos_partition *) (&mboot.parts[0]);
536 partp->dp_typ = DOSPTYP_386BSD;
537 partp->dp_flag = ACTIVE;
538 start = ((start + dos_sectors - 1) / dos_sectors) * dos_sectors;
541 partp->dp_start = start;
542 partp->dp_size = (disksecs / dos_cylsecs) * dos_cylsecs - start;
550 struct dos_partition *partp = ((struct dos_partition *) &mboot.parts) + i - 1;
552 printf("The data for partition %d is:\n", i);
555 if (u_flag && ok("Do you want to change it?")) {
559 bzero((char *)partp, sizeof (struct dos_partition));
562 printf("\nThe static data for the slice 1 has been reinitialized to:\n");
568 Decimal("sysid (165=FreeBSD)", partp->dp_typ, tmp);
569 Decimal("start", partp->dp_start, tmp);
570 Decimal("size", partp->dp_size, tmp);
571 if (!sanitize_partition(partp)) {
572 warnx("ERROR: failed to adjust; setting sysid to 0");
576 if (ok("Explicitly specify beg/end address ?"))
579 tcyl = DPCYL(partp->dp_scyl,partp->dp_ssect);
581 tsec = DPSECT(partp->dp_ssect);
582 Decimal("beginning cylinder", tcyl, tmp);
583 Decimal("beginning head", thd, tmp);
584 Decimal("beginning sector", tsec, tmp);
585 partp->dp_scyl = DOSCYL(tcyl);
586 partp->dp_ssect = DOSSECT(tsec,tcyl);
589 tcyl = DPCYL(partp->dp_ecyl,partp->dp_esect);
591 tsec = DPSECT(partp->dp_esect);
592 Decimal("ending cylinder", tcyl, tmp);
593 Decimal("ending head", thd, tmp);
594 Decimal("ending sector", tsec, tmp);
595 partp->dp_ecyl = DOSCYL(tcyl);
596 partp->dp_esect = DOSSECT(tsec,tcyl);
602 } while (!ok("Are we happy with this entry?"));
609 printf("parameters extracted from in-core disklabel are:\n");
610 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
611 ,cyls,heads,sectors,cylsecs);
612 if (dos_cyls > 1023 || dos_heads > 255 || dos_sectors > 63)
613 printf("Figures below won't work with BIOS for partitions not in cyl 1\n");
614 printf("parameters to be used for BIOS calculations are:\n");
615 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
616 ,dos_cyls,dos_heads,dos_sectors,dos_cylsecs);
620 change_active(int which)
622 struct dos_partition *partp = &mboot.parts[0];
623 int active, i, new, tmp;
626 for (i = 0; i < NDOSPART; i++) {
627 if ((partp[i].dp_flag & ACTIVE) == 0)
629 printf("Partition %d is marked active\n", i + 1);
633 if (a_flag && which != -1)
635 else if (active == -1)
638 if (!ok("Do you want to change the active partition?"))
643 Decimal("active partition", new, tmp);
644 if (new < 1 || new > 4) {
645 printf("Active partition number must be in range 1-4."
650 } while (!ok("Are you happy with this choice"));
651 for (i = 0; i < NDOSPART; i++)
652 partp[i].dp_flag = 0;
653 if (active > 0 && active <= NDOSPART)
654 partp[active-1].dp_flag = ACTIVE;
660 if (ok("Do you want to change the boot code?"))
669 if (ok("Do you want to change our idea of what BIOS thinks ?"))
673 Decimal("BIOS's idea of #cylinders", dos_cyls, tmp);
674 Decimal("BIOS's idea of #heads", dos_heads, tmp);
675 Decimal("BIOS's idea of #sectors", dos_sectors, tmp);
676 dos_cylsecs = dos_heads * dos_sectors;
679 while(!ok("Are you happy with this choice"));
684 /***********************************************\
685 * Change real numbers into strange dos numbers *
686 \***********************************************/
688 dos(struct dos_partition *partp)
693 if (partp->dp_typ == 0 && partp->dp_start == 0 && partp->dp_size == 0) {
694 memcpy(partp, &mtpart, sizeof(*partp));
699 partp->dp_shd = partp->dp_start % dos_cylsecs / dos_sectors;
700 cy = partp->dp_start / dos_cylsecs;
701 sec = partp->dp_start % dos_sectors + 1;
702 partp->dp_scyl = DOSCYL(cy);
703 partp->dp_ssect = DOSSECT(sec, cy);
706 end = partp->dp_start + partp->dp_size - 1;
707 partp->dp_ehd = end % dos_cylsecs / dos_sectors;
708 cy = end / dos_cylsecs;
709 sec = end % dos_sectors + 1;
710 partp->dp_ecyl = DOSCYL(cy);
711 partp->dp_esect = DOSSECT(sec, cy);
719 /* Write mode if one of these flags are set. */
720 rwmode = (a_flag || I_flag || B_flag || flag);
721 fd = g_open(disk, rwmode);
722 /* If the mode fails, try read-only if we didn't. */
723 if (fd == -1 && errno == EPERM && rwmode)
724 fd = g_open(disk, 0);
725 if (fd == -1 && errno == ENXIO)
728 warnx("can't open device %s", disk);
731 if (get_params() == -1) {
732 warnx("can't get disk parameters on %s", disk);
739 read_disk(off_t sector, void *buf)
742 lseek(fd, (sector * 512), 0);
744 for (secsize = MIN_SEC_SIZE; secsize <= MAX_SEC_SIZE;
747 int size = read(fd, buf, secsize);
749 /* it worked so return */
753 return read(fd, buf, secsize);
755 /* we failed to read at any of the sizes */
760 write_disk(off_t sector, void *buf)
763 struct gctl_req *grq;
765 char fbuf[BUFSIZ], *pname;
768 grq = gctl_get_handle();
769 gctl_ro_param(grq, "verb", -1, "write MBR");
770 gctl_ro_param(grq, "class", -1, "MBR");
771 pname = g_providername(fd);
773 warn("Error getting providername for %s", disk);
776 gctl_ro_param(grq, "geom", -1, pname);
777 gctl_ro_param(grq, "data", secsize, buf);
778 errmsg = gctl_issue(grq);
780 if (errmsg == NULL) {
784 if (!q_flag) /* GEOM errors are benign, not all devices supported */
788 error = pwrite(fd, buf, secsize, (sector * 512));
789 if (error == secsize)
792 for (i = 1; i < 5; i++) {
793 sprintf(fbuf, "%ss%d", disk, i);
794 fdw = open(fbuf, O_RDWR, 0);
797 error = ioctl(fdw, DIOCSMBR, buf);
802 warnx("Failed to write sector zero");
813 error = ioctl(fd, DIOCGFWSECTORS, &u);
815 sectors = dos_sectors = u;
817 sectors = dos_sectors = 63;
819 error = ioctl(fd, DIOCGFWHEADS, &u);
821 heads = dos_heads = u;
823 heads = dos_heads = 255;
825 dos_cylsecs = cylsecs = heads * sectors;
826 disksecs = cyls * heads * sectors;
828 u = g_sectorsize(fd);
836 cyls = dos_cyls = o / (u * dos_heads * dos_sectors);
846 mboot.bootinst_size = secsize;
847 if (mboot.bootinst != NULL)
848 free(mboot.bootinst);
849 if ((mboot.bootinst = malloc(mboot.bootinst_size)) == NULL) {
850 warnx("unable to allocate buffer to read fdisk "
854 if (read_disk(0, mboot.bootinst) == -1) {
855 warnx("can't read fdisk partition table");
858 if (le16dec(&mboot.bootinst[DOSMAGICOFFSET]) != DOSMAGIC) {
859 warnx("invalid fdisk partition table found");
860 /* So should we initialize things */
863 for (i = 0; i < NDOSPART; i++)
865 &mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE],
879 for(i = 0; i < NDOSPART; i++)
880 dos_partition_enc(&mboot.bootinst[DOSPARTOFF + i * DOSPARTSIZE],
882 le16enc(&mboot.bootinst[DOSMAGICOFFSET], DOSMAGIC);
883 for(sector = 0; sector < mboot.bootinst_size / secsize; sector++)
884 if (write_disk(sector,
885 &mboot.bootinst[sector * secsize]) == -1) {
886 warn("can't write fdisk partition table");
896 printf("%s [n] ", str);
898 if (fgets(lbuf, LBUF, stdin) == NULL)
900 lbuf[strlen(lbuf)-1] = 0;
903 (!strcmp(lbuf, "yes") || !strcmp(lbuf, "YES") ||
904 !strcmp(lbuf, "y") || !strcmp(lbuf, "Y")))
911 decimal(const char *str, int *num, int deflt)
917 printf("Supply a decimal value for \"%s\" [%d] ", str, deflt);
919 if (fgets(lbuf, LBUF, stdin) == NULL)
921 lbuf[strlen(lbuf)-1] = 0;
927 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
930 while ((c = *cp++)) {
931 if (c <= '9' && c >= '0')
932 acc = acc * 10 + c - '0';
936 if (c == ' ' || c == '\t')
937 while ((c = *cp) && (c == ' ' || c == '\t')) cp++;
942 printf("%s is an invalid decimal number. Try again.\n",
951 int numentries = (sizeof(part_types)/sizeof(struct part_type));
953 struct part_type *ptr = part_types;
956 while(counter < numentries) {
957 if(ptr->type == type)
967 parse_config_line(char *line, CMD *command)
973 memset(command, 0, sizeof(*command));
975 while (isspace(*cp)) ++cp;
976 if (*cp == '\0' || *cp == '#')
978 command->cmd = *cp++;
984 while (isspace(*cp)) ++cp;
986 break; /* found comment */
988 command->args[command->n_args].argtype = *cp++;
990 break; /* assume end of line */
992 command->args[command->n_args].arg_val = strtol(cp, &end, 0);
994 break; /* couldn't parse number */
1004 process_geometry(CMD *command)
1010 if (part_processed) {
1012 "ERROR line %d: the geometry specification line must occur before\n\
1013 all partition specifications",
1014 current_line_number);
1018 if (command->n_args != 3) {
1019 warnx("ERROR line %d: incorrect number of geometry args",
1020 current_line_number);
1027 for (i = 0; i < 3; ++i) {
1028 switch (command->args[i].argtype) {
1030 dos_cyls = command->args[i].arg_val;
1033 dos_heads = command->args[i].arg_val;
1036 dos_sectors = command->args[i].arg_val;
1040 "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)",
1041 current_line_number, command->args[i].argtype,
1042 command->args[i].argtype);
1050 dos_cylsecs = dos_heads * dos_sectors;
1053 * Do sanity checks on parameter values
1055 if (dos_cyls == 0) {
1056 warnx("ERROR line %d: number of cylinders not specified",
1057 current_line_number);
1060 if (dos_cyls > 1024) {
1062 "WARNING line %d: number of cylinders (%d) may be out-of-range\n\
1063 (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\
1064 is dedicated to FreeBSD)",
1065 current_line_number, dos_cyls);
1068 if (dos_heads == 0) {
1069 warnx("ERROR line %d: number of heads not specified",
1070 current_line_number);
1072 } else if (dos_heads > 256) {
1073 warnx("ERROR line %d: number of heads must be within (1-256)",
1074 current_line_number);
1078 if (dos_sectors == 0) {
1079 warnx("ERROR line %d: number of sectors not specified",
1080 current_line_number);
1082 } else if (dos_sectors > 63) {
1083 warnx("ERROR line %d: number of sectors must be within (1-63)",
1084 current_line_number);
1095 process_partition(CMD *command)
1097 int status = 0, partition;
1098 u_int32_t prev_head_boundary, prev_cyl_boundary;
1099 u_int32_t adj_size, max_end;
1100 struct dos_partition *partp;
1104 if (command->n_args != 4) {
1105 warnx("ERROR line %d: incorrect number of partition args",
1106 current_line_number);
1109 partition = command->args[0].arg_val;
1110 if (partition < 1 || partition > 4) {
1111 warnx("ERROR line %d: invalid partition number %d",
1112 current_line_number, partition);
1115 partp = ((struct dos_partition *) &mboot.parts) + partition - 1;
1116 bzero((char *)partp, sizeof (struct dos_partition));
1117 partp->dp_typ = command->args[1].arg_val;
1118 partp->dp_start = command->args[2].arg_val;
1119 partp->dp_size = command->args[3].arg_val;
1120 max_end = partp->dp_start + partp->dp_size;
1122 if (partp->dp_typ == 0) {
1124 * Get out, the partition is marked as unused.
1127 * Insure that it's unused.
1129 bzero((char *)partp, sizeof (struct dos_partition));
1135 * Adjust start upwards, if necessary, to fall on a head boundary.
1137 if (partp->dp_start % dos_sectors != 0) {
1138 prev_head_boundary = partp->dp_start / dos_sectors * dos_sectors;
1139 if (max_end < dos_sectors ||
1140 prev_head_boundary > max_end - dos_sectors) {
1142 * Can't go past end of partition
1145 "ERROR line %d: unable to adjust start of partition %d to fall on\n\
1147 current_line_number, partition);
1151 "WARNING: adjusting start offset of partition %d\n\
1152 from %u to %u, to fall on a head boundary",
1153 partition, (u_int)partp->dp_start,
1154 (u_int)(prev_head_boundary + dos_sectors));
1155 partp->dp_start = prev_head_boundary + dos_sectors;
1159 * Adjust size downwards, if necessary, to fall on a cylinder
1163 ((partp->dp_start + partp->dp_size) / dos_cylsecs) * dos_cylsecs;
1164 if (prev_cyl_boundary > partp->dp_start)
1165 adj_size = prev_cyl_boundary - partp->dp_start;
1168 "ERROR: could not adjust partition to start on a head boundary\n\
1169 and end on a cylinder boundary.");
1172 if (adj_size != partp->dp_size) {
1174 "WARNING: adjusting size of partition %d from %u to %u\n\
1175 to end on a cylinder boundary",
1176 partition, (u_int)partp->dp_size, (u_int)adj_size);
1177 partp->dp_size = adj_size;
1179 if (partp->dp_size == 0) {
1180 warnx("ERROR line %d: size of partition %d is zero",
1181 current_line_number, partition);
1194 process_active(CMD *command)
1196 int status = 0, partition, i;
1197 struct dos_partition *partp;
1200 active_processed = 1;
1201 if (command->n_args != 1) {
1202 warnx("ERROR line %d: incorrect number of active args",
1203 current_line_number);
1207 partition = command->args[0].arg_val;
1208 if (partition < 1 || partition > 4) {
1209 warnx("ERROR line %d: invalid partition number %d",
1210 current_line_number, partition);
1214 * Reset active partition
1216 partp = ((struct dos_partition *) &mboot.parts);
1217 for (i = 0; i < NDOSPART; i++)
1218 partp[i].dp_flag = 0;
1219 partp[partition-1].dp_flag = ACTIVE;
1229 process_line(char *line)
1235 parse_config_line(line, &command);
1236 switch (command.cmd) {
1239 * Comment or blank line
1246 status = process_geometry(&command);
1249 status = process_partition(&command);
1252 status = process_active(&command);
1265 read_config(char *config_file)
1272 if (strcmp(config_file, "-") != 0) {
1274 * We're not reading from stdin
1276 if ((fp = fopen(config_file, "r")) == NULL) {
1283 current_line_number = 0;
1285 if (fgets(buf, sizeof(buf), fp) == NULL)
1287 ++current_line_number;
1288 status = process_line(buf);
1296 * It doesn't matter if we're reading from stdin, as we've reached EOF
1308 struct dos_partition *partp;
1311 for (i = 0; i < 4; ++i) {
1312 partp = ((struct dos_partition *) &mboot.parts) + i;
1313 bzero((char *)partp, sizeof (struct dos_partition));
1318 sanitize_partition(struct dos_partition *partp)
1320 u_int32_t prev_head_boundary, prev_cyl_boundary;
1321 u_int32_t max_end, size, start;
1323 start = partp->dp_start;
1324 size = partp->dp_size;
1325 max_end = start + size;
1326 /* Only allow a zero size if the partition is being marked unused. */
1328 if (start == 0 && partp->dp_typ == 0)
1330 warnx("ERROR: size of partition is zero");
1333 /* Return if no adjustment is necessary. */
1334 if (start % dos_sectors == 0 && (start + size) % dos_sectors == 0)
1338 warnx("WARNING: partition overlaps with partition table");
1339 if (ok("Correct this automatically?"))
1340 start = dos_sectors;
1342 if (start % dos_sectors != 0)
1343 warnx("WARNING: partition does not start on a head boundary");
1344 if ((start +size) % dos_sectors != 0)
1345 warnx("WARNING: partition does not end on a cylinder boundary");
1346 warnx("WARNING: this may confuse the BIOS or some operating systems");
1347 if (!ok("Correct this automatically?"))
1351 * Adjust start upwards, if necessary, to fall on a head boundary.
1353 if (start % dos_sectors != 0) {
1354 prev_head_boundary = start / dos_sectors * dos_sectors;
1355 if (max_end < dos_sectors ||
1356 prev_head_boundary >= max_end - dos_sectors) {
1358 * Can't go past end of partition
1361 "ERROR: unable to adjust start of partition to fall on a head boundary");
1364 start = prev_head_boundary + dos_sectors;
1368 * Adjust size downwards, if necessary, to fall on a cylinder
1371 prev_cyl_boundary = ((start + size) / dos_cylsecs) * dos_cylsecs;
1372 if (prev_cyl_boundary > start)
1373 size = prev_cyl_boundary - start;
1375 warnx("ERROR: could not adjust partition to start on a head boundary\n\
1376 and end on a cylinder boundary.");
1380 /* Finally, commit any changes to partp and return. */
1381 if (start != partp->dp_start) {
1382 warnx("WARNING: adjusting start offset of partition to %u",
1384 partp->dp_start = start;
1386 if (size != partp->dp_size) {
1387 warnx("WARNING: adjusting size of partition to %u", (u_int)size);
1388 partp->dp_size = size;
1395 * Try figuring out the root device's canonical disk name.
1396 * The following choices are considered:
1397 * /dev/ad0s1a => /dev/ad0
1398 * /dev/da0a => /dev/da0
1399 * /dev/vinum/root => /dev/vinum/root
1404 struct statfs rootfs;
1407 regmatch_t rm[NMATCHES];
1411 if (statfs("/", &rootfs) == -1)
1412 err(1, "statfs(\"/\")");
1414 if ((rv = regcomp(&re, "^(/dev/[a-z/]+[0-9]+)([sp][0-9]+)?[a-h]?$",
1415 REG_EXTENDED)) != 0)
1416 errx(1, "regcomp() failed (%d)", rv);
1417 if ((rv = regexec(&re, rootfs.f_mntfromname, NMATCHES, rm, 0)) != 0)
1419 "mounted root fs resource doesn't match expectations (regexec returned %d)",
1421 if ((s = malloc(rm[1].rm_eo - rm[1].rm_so + 1)) == NULL)
1422 errx(1, "out of memory");
1423 memcpy(s, rootfs.f_mntfromname + rm[1].rm_so,
1424 rm[1].rm_eo - rm[1].rm_so);
1425 s[rm[1].rm_eo - rm[1].rm_so] = 0;