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.
26 * $FreeBSD: /repoman/r/ncvs/src/sbin/i386/fdisk/fdisk.c,v 1.36.2.14 2004/01/30 14:40:47 harti Exp $
29 #include <sys/param.h>
30 #include <sys/diskslice.h>
31 #include <sys/diskmbr.h>
32 #include <sys/ioctl_compat.h>
33 #include <sys/sysctl.h>
46 static char lbuf
[LBUF
];
50 * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
52 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
53 * Copyright (c) 1989 Robert. V. Baron
57 #define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp
58 #define MAX_SEC_SIZE 2048 /* maximum section size that is supported */
59 #define MIN_SEC_SIZE 512 /* the sector size to start sensing at */
60 #define MAX_SECTORS_PER_TRACK 0x3f /* maximum number of sectors per track */
61 #define MIN_SECTORS_PER_TRACK 0x1 /* minimum number of sectors per track */
62 #define MAX_HEADS 0xff /* maximum number of head */
63 static int secsize
= 0; /* the sensed sector size */
65 static int fd
; /* file descriptor of the given disk */
66 static const char *disk
;
67 static const char *disks
[] =
69 "/dev/ad0", "/dev/da0", "/dev/vkd0", 0
72 static int cyls
, sectors
, heads
, cylsecs
;
73 static int64_t disksecs
;
77 unsigned char padding
[2]; /* force the longs to be long aligned */
78 unsigned char *bootinst
; /* boot code */
80 struct dos_partition parts
[4];
82 static struct mboot mboot
;
85 #define BOOT_MAGIC 0xAA55
92 #define DOSSECT(s,c) ((s & MAX_SECTORS_PER_TRACK) | ((c >> 2) & 0xc0))
93 #define DOSCYL(c) (c & 0xff)
95 static int partition
= -1;
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 C_flag
= 0; /* use wrapped values for CHS */
115 static int E_flag
= 0; /* Erase through TRIM */
116 static int I_flag
= 0; /* use entire disk for DragonFly */
117 static int a_flag
= 0; /* set active partition */
118 static char *b_flag
= NULL
; /* path to boot code */
119 static int i_flag
= 0; /* replace partition data */
120 static int u_flag
= 0; /* update partition data */
121 static int p_flag
= 0; /* operate on a disk image file */
122 static int s_flag
= 0; /* Print a summary and exit */
123 static int t_flag
= 0; /* test only */
124 static char *f_flag
= NULL
; /* Read config info from file */
125 static int v_flag
= 0; /* Be verbose */
134 ,{0x01, "Primary DOS with 12 bit FAT"}
135 ,{0x02, "XENIX / filesystem"}
136 ,{0x03, "XENIX /usr filesystem"}
137 ,{0x04, "Primary DOS with 16 bit FAT (<= 32MB)"}
138 ,{0x05, "Extended DOS"}
139 ,{0x06, "Primary 'big' DOS (> 32MB)"}
140 ,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"}
141 ,{0x08, "AIX filesystem"}
142 ,{0x09, "AIX boot partition or Coherent"}
143 ,{0x0A, "OS/2 Boot Manager or OPUS"}
144 ,{0x0B, "DOS or Windows 95 with 32 bit FAT"}
145 ,{0x0C, "DOS or Windows 95 with 32 bit FAT, LBA"}
146 ,{0x0E, "Primary 'big' DOS (> 32MB, LBA)"}
147 ,{0x0F, "Extended DOS, LBA"}
149 ,{0x11, "OS/2 BM: hidden DOS with 12-bit FAT"}
150 ,{0x12, "Compaq diagnostics"}
151 ,{0x14, "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)"}
152 ,{0x16, "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)"}
153 ,{0x17, "OS/2 BM: hidden IFS (e.g. HPFS)"}
154 ,{0x18, "AST Windows swapfile"}
157 ,{0x3C, "PartitionMagic recovery"}
159 ,{0x41, "Linux/MINIX (sharing disk with DRDOS)"}
160 ,{0x42, "SFS or Linux swap (sharing disk with DRDOS)"}
161 ,{0x43, "Linux native (sharing disk with DRDOS)"}
162 ,{0x4D, "QNX 4.2 Primary"}
163 ,{0x4E, "QNX 4.2 Secondary"}
164 ,{0x4F, "QNX 4.2 Tertiary"}
167 ,{0x52, "CP/M or Microport SysV/AT"}
170 ,{0x55, "EZ-Drive (disk manager)"}
172 ,{0x5C, "Priam Edisk (disk manager)"} /* according to S. Widlake */
174 ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"}
175 ,{0x64, "Novell Netware 2.xx"}
176 ,{0x65, "Novell Netware 3.xx"}
177 ,{0x6C, "DragonFlyBSD"}
178 ,{0x70, "DiskSecure Multi-Boot"}
181 ,{0x78, "QNX4.x 2nd part"}
182 ,{0x79, "QNX4.x 3rd part"}
183 ,{0x80, "Minix 1.1 ... 1.4a"}
184 ,{0x81, "Minix 1.4b ... 1.5.10"}
185 ,{0x82, "Linux swap or Solaris x86"}
186 ,{0x83, "Linux filesystem"}
187 ,{0x84, "OS/2 hidden C: drive"}
188 ,{0x85, "Linux extended"}
189 ,{0x86, "NTFS volume set??"}
190 ,{0x87, "NTFS volume set??"}
191 ,{0x93, "Amoeba filesystem"}
192 ,{0x94, "Amoeba bad block table"}
194 ,{0xA0, "Suspend to Disk"}
195 ,{0xA5, "DragonFly/FreeBSD/NetBSD/386BSD"}
200 ,{0xB7, "BSDI BSD/386 filesystem"}
201 ,{0xB8, "BSDI BSD/386 swap"}
202 ,{0xBE, "Solaris x86 boot"}
203 ,{0xC1, "DRDOS/sec with 12-bit FAT"}
204 ,{0xC4, "DRDOS/sec with 16-bit FAT (< 32MB)"}
205 ,{0xC6, "DRDOS/sec with 16-bit FAT (>= 32MB)"}
207 ,{0xDB, "Concurrent CPM or C.DOS or CTOS"}
211 ,{0xEB, "BeOS file system"}
213 ,{0xEF, "EFI System Partition"}
215 ,{0xF2, "DOS 3.3+ Secondary"}
217 ,{0xFE, "SpeedStor >1024 cyl. or LANstep"}
218 ,{0xFF, "BBT (Bad Blocks Table)"}
221 static void print_s0(int which
);
222 static void print_part(int i
);
223 static void init_sector0(unsigned long start
);
224 static void init_boot(void);
225 static void change_part(int i
);
226 static void print_params(void);
227 static void change_active(int which
);
228 static void change_code(void);
229 static void get_params_to_use(void);
230 static void dos(struct dos_partition
*partp
);
231 static int open_disk(void);
232 static void erase_partition(int i
);
233 static ssize_t
read_disk(off_t sector
, void *buf
);
234 static ssize_t
write_disk(off_t sector
, void *buf
);
235 static int get_params(void);
236 static int read_s0(void);
237 static int write_s0(void);
238 static int ok(const char *str
);
239 static int decimal(const char *str
, int *num
, int deflt
);
240 static const char *get_type(int type
);
241 static int read_config(char *config_file
);
242 static void reset_boot(void);
243 static int sanitize_partition(struct dos_partition
*);
244 static void usage(void);
247 main(int argc
, char *argv
[])
251 while ((c
= getopt(argc
, argv
, "BCEIab:f:p:istuv1234")) != -1)
302 if (f_flag
|| i_flag
)
310 disk
= getdevpath(argv
[0], 0);
312 err(1, "cannot open disk %s", disk
);
313 } else if (disk
== NULL
) {
316 for(i
= 0; disks
[i
]; i
++)
323 err(1, "cannot open any disk");
326 err(1, "cannot open disk %s", disk
);
329 /* (abu)use mboot.bootinst to probe for the sector size */
330 if ((mboot
.bootinst
= malloc(MAX_SEC_SIZE
)) == NULL
)
331 err(1, "cannot allocate buffer to determine disk sector size");
332 read_disk(0, mboot
.bootinst
);
333 free(mboot
.bootinst
);
334 mboot
.bootinst
= NULL
;
339 struct dos_partition
*partp
;
343 printf("%s: %d cyl %d hd %d sec\n", disk
, dos_cyls
, dos_heads
,
345 printf("Part %11s %11s Type Flags\n", "Start", "Size");
346 for (j
= 0; j
< NDOSPART
; j
++) {
347 partp
= ((struct dos_partition
*) &mboot
.parts
) + j
;
348 if (partp
->dp_start
== 0 && partp
->dp_size
== 0)
350 printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", j
+ 1,
351 (u_long
) partp
->dp_start
,
352 (u_long
) partp
->dp_size
, partp
->dp_typ
,
358 printf("******* Working on device %s *******\n",disk
);
362 struct dos_partition
*partp
;
366 partp
= (struct dos_partition
*) (&mboot
.parts
[0]);
367 partp
->dp_typ
= DOSPTYP_DFLYBSD
;
368 partp
->dp_flag
= ACTIVE
;
369 partp
->dp_start
= dos_sectors
;
370 if (disksecs
- dos_sectors
> 0xFFFFFFFFU
) {
371 printf("Warning: Ending logical block > 2TB, using max value\n");
372 partp
->dp_size
= 0xFFFFFFFFU
;
374 partp
->dp_size
= (disksecs
/ dos_cylsecs
) *
375 dos_cylsecs
- dos_sectors
;
382 /* Trim now if we're using the entire device */
392 if (read_s0() || i_flag
)
397 if (!read_config(f_flag
))
422 init_sector0(dos_sectors
);
424 printf("Media sector size is %d\n", secsize
);
425 printf("Warning: BIOS sector numbering starts with sector 1\n");
426 printf("Information from DOS bootblock is:\n");
428 for (i
= 1; i
<= NDOSPART
; i
++)
431 change_part(partition
);
433 if (u_flag
|| a_flag
)
434 change_active(partition
);
439 if (u_flag
|| a_flag
|| B_flag
) {
441 printf("\nWe haven't changed the partition table yet. ");
442 printf("This is your last chance.\n");
446 if (ok("Should we write new partition table?")) {
447 if (E_flag
&& u_flag
) {
449 * Trim now because we've committed to
450 * updating the partition.
453 for (i
= 0; i
< NDOSPART
; i
++)
456 erase_partition(partition
);
463 printf("\n-t flag specified -- partition table not written.\n");
474 fprintf(stderr
, "%s%s",
475 "usage: fdisk [-BCEIaistu] [-b bootcode] [-p diskimage] [-1234] [disk]\n",
476 " fdisk -f configfile [-itv] [disk]\n");
486 printf("Information from DOS bootblock is:\n");
488 for (i
= 1; i
<= NDOSPART
; i
++)
489 printf("%d: ", i
), print_part(i
);
494 static struct dos_partition mtpart
= { 0 };
499 struct dos_partition
*partp
;
502 partp
= ((struct dos_partition
*) &mboot
.parts
) + i
- 1;
504 if (!bcmp(partp
, &mtpart
, sizeof (struct dos_partition
))) {
505 printf("<UNUSED>\n");
509 * Be careful not to overflow.
511 part_mb
= partp
->dp_size
;
513 part_mb
/= (1024 * 1024);
514 printf("sysid %d,(%s)\n", partp
->dp_typ
, get_type(partp
->dp_typ
));
515 printf(" start %lu, size %lu (%jd Meg), flag %x%s\n",
516 (u_long
)partp
->dp_start
,
517 (u_long
)partp
->dp_size
,
520 partp
->dp_flag
== ACTIVE
? " (active)" : "");
521 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n"
522 ,DPCYL(partp
->dp_scyl
, partp
->dp_ssect
)
524 ,DPSECT(partp
->dp_ssect
)
525 ,DPCYL(partp
->dp_ecyl
, partp
->dp_esect
)
527 ,DPSECT(partp
->dp_esect
));
538 fname
= b_flag
? b_flag
: "/boot/mbr";
539 if ((boot_fd
= open(fname
, O_RDONLY
)) == -1 ||
540 fstat(boot_fd
, &sb
) == -1)
542 if ((mboot
.bootinst_size
= sb
.st_size
) % secsize
!= 0)
543 errx(1, "%s: length must be a multiple of sector size", fname
);
544 if (mboot
.bootinst
!= NULL
)
545 free(mboot
.bootinst
);
546 if ((mboot
.bootinst
= malloc(mboot
.bootinst_size
= sb
.st_size
)) == NULL
)
547 errx(1, "%s: unable to allocate read buffer", fname
);
548 if ((n
= read(boot_fd
, mboot
.bootinst
, mboot
.bootinst_size
)) == -1 ||
551 if (n
!= mboot
.bootinst_size
)
552 errx(1, "%s: short read", fname
);
557 init_sector0(unsigned long start
)
559 struct dos_partition
*partp
= (struct dos_partition
*) (&mboot
.parts
[3]);
563 partp
->dp_typ
= DOSPTYP_DFLYBSD
;
564 partp
->dp_flag
= ACTIVE
;
565 start
= roundup(start
, dos_sectors
);
568 partp
->dp_start
= start
;
569 if (disksecs
- start
> 0xFFFFFFFFU
) {
570 printf("Warning: Ending logical block > 2TB, using max value\n");
571 partp
->dp_size
= 0xFFFFFFFFU
;
573 partp
->dp_size
= (disksecs
/ dos_cylsecs
) * dos_cylsecs
- start
;
582 struct dos_partition
*partp
= ((struct dos_partition
*) &mboot
.parts
) + i
- 1;
584 printf("The data for partition %d is:\n", i
);
587 if (u_flag
&& ok("Do you want to change it?")) {
591 bzero((char *)partp
, sizeof (struct dos_partition
));
594 printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n");
600 Decimal("sysid (165=DragonFly)", partp
->dp_typ
, tmp
);
601 Decimal("start", partp
->dp_start
, tmp
);
602 Decimal("size", partp
->dp_size
, tmp
);
603 if (!sanitize_partition(partp
)) {
604 warnx("ERROR: failed to adjust; setting sysid to 0");
608 if (ok("Explicitly specify beg/end address ?"))
611 tcyl
= DPCYL(partp
->dp_scyl
,partp
->dp_ssect
);
613 tsec
= DPSECT(partp
->dp_ssect
);
614 Decimal("beginning cylinder", tcyl
, tmp
);
615 Decimal("beginning head", thd
, tmp
);
616 Decimal("beginning sector", tsec
, tmp
);
617 if (tcyl
> MAXCYL
&& C_flag
== 0) {
618 printf("Warning: starting cylinder wraps, using all 1's\n");
620 partp
->dp_ssect
= -1;
623 partp
->dp_scyl
= DOSCYL(tcyl
);
624 partp
->dp_ssect
= DOSSECT(tsec
,tcyl
);
628 tcyl
= DPCYL(partp
->dp_ecyl
,partp
->dp_esect
);
630 tsec
= DPSECT(partp
->dp_esect
);
631 Decimal("ending cylinder", tcyl
, tmp
);
632 Decimal("ending head", thd
, tmp
);
633 Decimal("ending sector", tsec
, tmp
);
634 if (tcyl
> MAXCYL
&& C_flag
== 0) {
635 printf("Warning: ending cylinder wraps, using all 1's\n");
637 partp
->dp_esect
= -1;
640 partp
->dp_ecyl
= DOSCYL(tcyl
);
641 partp
->dp_esect
= DOSSECT(tsec
,tcyl
);
648 } while (!ok("Are we happy with this entry?"));
655 printf("parameters extracted from device are:\n");
656 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
657 ,cyls
,heads
,sectors
,cylsecs
);
658 if ((dos_sectors
> MAX_SECTORS_PER_TRACK
) || (dos_cyls
> MAXCYL
) || (dos_heads
> MAX_HEADS
))
659 printf("Figures below won't work with BIOS for partitions not in cyl 1\n");
660 printf("parameters to be used for BIOS calculations are:\n");
661 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
662 ,dos_cyls
,dos_heads
,dos_sectors
,dos_cylsecs
);
666 change_active(int which
)
668 struct dos_partition
*partp
= &mboot
.parts
[0];
669 int active
, i
, new, tmp
;
672 for (i
= 0; i
< NDOSPART
; i
++) {
673 if ((partp
[i
].dp_flag
& ACTIVE
) == 0)
675 printf("Partition %d is marked active\n", i
+ 1);
679 if (a_flag
&& which
!= -1)
681 else if (active
== -1)
684 if (!ok("Do you want to change the active partition?"))
689 Decimal("active partition", new, tmp
);
690 if (new < 1 || new > 4) {
691 printf("Active partition number must be in range 1-4."
696 } while (!ok("Are you happy with this choice"));
697 for (i
= 0; i
< NDOSPART
; i
++)
698 partp
[i
].dp_flag
= 0;
699 if (active
> 0 && active
<= NDOSPART
)
700 partp
[active
-1].dp_flag
= ACTIVE
;
706 if (ok("Do you want to change the boot code?"))
711 get_params_to_use(void)
715 if (ok("Do you want to change our idea of what BIOS thinks ?"))
719 Decimal("BIOS's idea of #cylinders", dos_cyls
, tmp
);
720 Decimal("BIOS's idea of #heads", dos_heads
, tmp
);
721 Decimal("BIOS's idea of #sectors", dos_sectors
, tmp
);
722 dos_cylsecs
= dos_heads
* dos_sectors
;
725 while(!ok("Are you happy with this choice"));
730 /***********************************************\
731 * Change real numbers into strange dos numbers *
732 \***********************************************/
734 dos(struct dos_partition
*partp
)
739 if (partp
->dp_typ
== 0 && partp
->dp_start
== 0 && partp
->dp_size
== 0) {
740 memcpy(partp
, &mtpart
, sizeof(*partp
));
745 cy
= partp
->dp_start
/ dos_cylsecs
;
746 sec
= partp
->dp_start
% dos_sectors
+ 1;
747 if (cy
> MAXCYL
&& C_flag
== 0) {
748 printf("Warning: starting cylinder wraps, using all 1's\n");
751 partp
->dp_ssect
= -1;
753 partp
->dp_shd
= partp
->dp_start
% dos_cylsecs
/ dos_sectors
;
754 partp
->dp_scyl
= DOSCYL(cy
);
755 partp
->dp_ssect
= DOSSECT(sec
, cy
);
759 end
= partp
->dp_start
+ partp
->dp_size
- 1;
760 cy
= end
/ dos_cylsecs
;
761 sec
= end
% dos_sectors
+ 1;
762 if (cy
> MAXCYL
&& C_flag
== 0) {
763 printf("Warning: ending cylinder wraps, using all 1's\n");
766 partp
->dp_esect
= -1;
768 partp
->dp_ehd
= end
% dos_cylsecs
/ dos_sectors
;
769 partp
->dp_ecyl
= DOSCYL(cy
);
770 partp
->dp_esect
= DOSSECT(sec
, cy
);
775 erase_partition(int i
)
777 struct dos_partition
*partp
;
780 char sysctl_name
[64];
781 int trim_enabled
= 0;
782 size_t olen
= sizeof(trim_enabled
);
783 char *dev_name
= strdup(disk
);
785 dev_name
= strtok(dev_name
+ strlen("/dev/da"),"s");
786 sprintf(sysctl_name
, "kern.cam.da.%s.trim_enabled", dev_name
);
787 if (sysctlbyname(sysctl_name
, &trim_enabled
, &olen
, NULL
, 0) < 0) {
788 printf("Device:%s does not support the TRIM command\n", disk
);
792 printf("Erase device option selected, but sysctl (%s) "
793 "is not enabled\n",sysctl_name
);
796 partp
= ((struct dos_partition
*) &mboot
.parts
) + i
;
797 printf("erase sectors:%u %u\n",
801 /* Trim the Device */
802 ioarg
[0] = partp
->dp_start
;
804 ioarg
[1] = partp
->dp_size
;
807 if (ioctl(fd
, IOCTLTRIM
, ioarg
) < 0) {
808 printf("Device trim failed\n");
813 /* Getting device status */
820 if (stat(disk
, &st
) == -1) {
823 warnx("can't get file status of %s", disk
);
826 if (!(st
.st_mode
& S_IFCHR
) && p_flag
== 0)
827 warnx("device %s is not character special", disk
);
829 a_flag
|| I_flag
|| B_flag
|| u_flag
? O_RDWR
: O_RDONLY
)) == -1) {
832 warnx("can't open device %s", disk
);
835 if (get_params() == -1) {
836 warnx("can't get disk parameters on %s", disk
);
843 read_disk(off_t sector
, void *buf
)
845 lseek(fd
,(sector
* 512), 0);
847 for(secsize
= MIN_SEC_SIZE
; secsize
<= MAX_SEC_SIZE
; secsize
*= 2)
850 int size
= read(fd
, buf
, secsize
);
852 /* it worked so return */
856 return read(fd
, buf
, secsize
);
858 /* we failed to read at any of the sizes */
863 write_disk(off_t sector
, void *buf
)
865 lseek(fd
,(sector
* 512), 0);
866 /* write out in the size that the read_disk found worked */
867 return write(fd
, buf
, secsize
);
873 struct partinfo partinfo
; /* disk parameters */
877 * NOTE: When faking up the CHS for a file image (e.g. for USB),
878 * we must use max values. If we do not then an overflowed
879 * cylinder count will, by convention, set the CHS fields to
880 * all 1's. The heads and sectors in the CHS fields will then
881 * exceed the basic geometry which can cause BIOSes to brick.
883 if (ioctl(fd
, DIOCGPART
, &partinfo
) == -1) {
884 if (p_flag
&& fstat(fd
, &st
) == 0 && st
.st_size
) {
885 sectors
= MAX_SECTORS_PER_TRACK
;
887 cylsecs
= heads
* sectors
;
888 cyls
= st
.st_size
/ 512 / cylsecs
;
890 warnx("can't get disk parameters on %s; supplying dummy ones",
893 cylsecs
= heads
* sectors
;
896 cyls
= partinfo
.d_ncylinders
;
897 heads
= partinfo
.d_nheads
;
898 sectors
= partinfo
.d_secpertrack
;
899 cylsecs
= heads
* sectors
;
900 secsize
= partinfo
.media_blksize
;
904 dos_sectors
= sectors
;
905 dos_cylsecs
= cylsecs
;
906 disksecs
= (int64_t)cyls
* heads
* sectors
;
914 mboot
.bootinst_size
= secsize
;
915 if (mboot
.bootinst
!= NULL
)
916 free(mboot
.bootinst
);
917 if ((mboot
.bootinst
= malloc(mboot
.bootinst_size
)) == NULL
) {
918 warnx("unable to allocate buffer to read fdisk "
922 if (read_disk(0, mboot
.bootinst
) == -1) {
923 warnx("can't read fdisk partition table");
926 if (*(uint16_t *)&mboot
.bootinst
[DOSMAGICOFFSET
] != BOOT_MAGIC
) {
927 warnx("invalid fdisk partition table found");
928 /* So should we initialize things */
931 memcpy(mboot
.parts
, &mboot
.bootinst
[DOSPARTOFF
], sizeof(mboot
.parts
));
943 memcpy(&mboot
.bootinst
[DOSPARTOFF
], mboot
.parts
, sizeof(mboot
.parts
));
945 * write enable label sector before write (if necessary),
946 * disable after writing.
947 * needed if the disklabel protected area also protects
948 * sector 0. (e.g. empty disk)
951 if (ioctl(fd
, DIOCWLABEL
, &flag
) < 0)
952 warn("ioctl DIOCWLABEL");
954 for(sector
= 0; sector
< mboot
.bootinst_size
/ secsize
; sector
++)
955 if (write_disk(sector
,
956 &mboot
.bootinst
[sector
* secsize
]) == -1) {
957 warn("can't write fdisk partition table");
960 ioctl(fd
, DIOCWLABEL
, &flag
);
966 ioctl(fd
, DIOCWLABEL
, &flag
);
975 printf("%s [n] ", str
);
977 if (fgets(lbuf
, LBUF
, stdin
) == NULL
)
979 lbuf
[strlen(lbuf
)-1] = 0;
982 (!strcmp(lbuf
, "yes") || !strcmp(lbuf
, "YES") ||
983 !strcmp(lbuf
, "y") || !strcmp(lbuf
, "Y")))
990 decimal(const char *str
, int *num
, int deflt
)
996 printf("Supply a decimal value for \"%s\" [%d] ", str
, deflt
);
998 if (fgets(lbuf
, LBUF
, stdin
) == NULL
)
1000 lbuf
[strlen(lbuf
)-1] = 0;
1006 while ((c
= *cp
) && (c
== ' ' || c
== '\t')) cp
++;
1009 while ((c
= *cp
++)) {
1010 if (c
<= '9' && c
>= '0')
1011 acc
= acc
* 10 + c
- '0';
1015 if (c
== ' ' || c
== '\t')
1016 while ((c
= *cp
) && (c
== ' ' || c
== '\t')) cp
++;
1021 printf("%s is an invalid decimal number. Try again.\n",
1030 int numentries
= (sizeof(part_types
)/sizeof(struct part_type
));
1032 struct part_type
*ptr
= part_types
;
1035 while(counter
< numentries
)
1037 if (ptr
->type
== type
)
1049 parse_config_line(char *line
, CMD
*command
)
1054 while (1) /* dirty trick used to insure one exit point for this
1057 memset(command
, 0, sizeof(*command
));
1059 while (isspace(*cp
)) ++cp
;
1060 if (*cp
== '\0' || *cp
== '#')
1064 command
->cmd
= *cp
++;
1071 while (isspace(*cp
)) ++cp
;
1074 break; /* found comment */
1078 command
->args
[command
->n_args
].argtype
= *cp
++;
1082 break; /* assume end of line */
1085 command
->args
[command
->n_args
].arg_val
= strtoll(cp
, &end
, 0);
1088 break; /* couldn't parse number */
1099 process_geometry(CMD
*command
)
1109 "ERROR line %d: the geometry specification line must occur before\n\
1110 all partition specifications",
1111 current_line_number
);
1115 if (command
->n_args
!= 3)
1117 warnx("ERROR line %d: incorrect number of geometry args",
1118 current_line_number
);
1125 for (i
= 0; i
< 3; ++i
)
1127 switch (command
->args
[i
].argtype
)
1130 dos_cyls
= command
->args
[i
].arg_val
;
1133 dos_heads
= command
->args
[i
].arg_val
;
1136 dos_sectors
= command
->args
[i
].arg_val
;
1140 "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)",
1141 current_line_number
, command
->args
[i
].argtype
,
1142 command
->args
[i
].argtype
);
1152 dos_cylsecs
= dos_heads
* dos_sectors
;
1155 * Do sanity checks on parameter values
1159 warnx("ERROR line %d: number of cylinders not specified",
1160 current_line_number
);
1163 if (dos_cyls
== 0 || dos_cyls
> 1024)
1166 "WARNING line %d: number of cylinders (%d) may be out-of-range\n\
1167 (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\
1168 is dedicated to DragonFly)",
1169 current_line_number
, dos_cyls
);
1174 warnx("ERROR line %d: number of heads not specified",
1175 current_line_number
);
1178 else if (dos_heads
< 1 || dos_heads
> 256)
1180 warnx("ERROR line %d: number of heads must be within (1-256)",
1181 current_line_number
);
1185 if (dos_sectors
< 0)
1187 warnx("ERROR line %d: number of sectors not specified",
1188 current_line_number
);
1191 else if (dos_sectors
< MIN_SECTORS_PER_TRACK
|| dos_sectors
> MAX_SECTORS_PER_TRACK
)
1193 warnx("ERROR line %d: number of sectors must be within (1-63)",
1194 current_line_number
);
1205 process_partition(CMD
*command
)
1207 int status
= 0, part
;
1208 uint32_t prev_head_boundary
, prev_cyl_boundary
;
1209 uint32_t adj_size
, max_end
;
1210 struct dos_partition
*partp
;
1215 if (command
->n_args
!= 4)
1217 warnx("ERROR line %d: incorrect number of partition args",
1218 current_line_number
);
1221 part
= command
->args
[0].arg_val
;
1222 if (part
< 1 || part
> 4)
1224 warnx("ERROR line %d: invalid partition number %d",
1225 current_line_number
, part
);
1228 partp
= ((struct dos_partition
*) &mboot
.parts
) + part
- 1;
1229 bzero((char *)partp
, sizeof (struct dos_partition
));
1230 partp
->dp_typ
= command
->args
[1].arg_val
;
1231 partp
->dp_start
= command
->args
[2].arg_val
;
1232 partp
->dp_size
= command
->args
[3].arg_val
;
1233 max_end
= partp
->dp_start
+ partp
->dp_size
;
1235 if (partp
->dp_typ
== 0)
1238 * Get out, the partition is marked as unused.
1241 * Insure that it's unused.
1243 bzero((char *)partp
, sizeof (struct dos_partition
));
1249 * Adjust start upwards, if necessary, to fall on an head boundary.
1251 if (partp
->dp_start
% dos_sectors
!= 0)
1253 prev_head_boundary
= partp
->dp_start
/ dos_sectors
* dos_sectors
;
1254 if (max_end
< (uint32_t)dos_sectors
||
1255 prev_head_boundary
> max_end
- dos_sectors
)
1258 * Can't go past end of partition
1261 "ERROR line %d: unable to adjust start of partition %d to fall on\n\
1263 current_line_number
, part
);
1267 "WARNING: adjusting start offset of partition %d\n\
1268 from %u to %u, to fall on a head boundary",
1269 part
, (u_int
)partp
->dp_start
,
1270 (u_int
)(prev_head_boundary
+ dos_sectors
));
1271 partp
->dp_start
= prev_head_boundary
+ dos_sectors
;
1275 * Adjust size downwards, if necessary, to fall on a cylinder
1279 ((partp
->dp_start
+ partp
->dp_size
) / dos_cylsecs
) * dos_cylsecs
;
1280 if (prev_cyl_boundary
> partp
->dp_start
)
1281 adj_size
= prev_cyl_boundary
- partp
->dp_start
;
1285 "ERROR: could not adjust partition to start on a head boundary\n\
1286 and end on a cylinder boundary.");
1289 if (adj_size
!= partp
->dp_size
)
1292 "WARNING: adjusting size of partition %d from %u to %u\n\
1293 to end on a cylinder boundary",
1294 part
, (u_int
)partp
->dp_size
, (u_int
)adj_size
);
1295 partp
->dp_size
= adj_size
;
1297 if (partp
->dp_size
== 0)
1299 warnx("ERROR line %d: size of partition %d is zero",
1300 current_line_number
, part
);
1313 process_active(CMD
*command
)
1315 int status
= 0, part
, i
;
1316 struct dos_partition
*partp
;
1320 active_processed
= 1;
1321 if (command
->n_args
!= 1)
1323 warnx("ERROR line %d: incorrect number of active args",
1324 current_line_number
);
1328 part
= command
->args
[0].arg_val
;
1329 if (part
< 1 || part
> 4)
1331 warnx("ERROR line %d: invalid partition number %d",
1332 current_line_number
, part
);
1336 * Reset active partition
1338 partp
= ((struct dos_partition
*) &mboot
.parts
);
1339 for (i
= 0; i
< NDOSPART
; i
++)
1340 partp
[i
].dp_flag
= 0;
1341 partp
[part
-1].dp_flag
= ACTIVE
;
1351 process_line(char *line
)
1358 parse_config_line(line
, &command
);
1359 switch (command
.cmd
)
1363 * Comment or blank line
1370 status
= process_geometry(&command
);
1373 status
= process_partition(&command
);
1376 status
= process_active(&command
);
1389 read_config(char *config_file
)
1395 while (1) /* dirty trick used to insure one exit point for this
1398 if (strcmp(config_file
, "-") != 0)
1401 * We're not reading from stdin
1403 if ((fp
= fopen(config_file
, "r")) == NULL
)
1413 current_line_number
= 0;
1416 if (fgets(buf
, sizeof(buf
), fp
) == NULL
)
1420 ++current_line_number
;
1421 status
= process_line(buf
);
1432 * It doesn't matter if we're reading from stdin, as we've reached EOF
1444 struct dos_partition
*partp
;
1447 for (i
= 0; i
< 4; ++i
)
1449 partp
= ((struct dos_partition
*) &mboot
.parts
) + i
;
1450 bzero((char *)partp
, sizeof (struct dos_partition
));
1455 sanitize_partition(struct dos_partition
*partp
)
1457 uint32_t prev_head_boundary
, prev_cyl_boundary
;
1458 uint32_t max_end
, size
, start
;
1460 start
= partp
->dp_start
;
1461 size
= partp
->dp_size
;
1462 max_end
= start
+ size
;
1463 /* Only allow a zero size if the partition is being marked unused. */
1465 if (start
== 0 && partp
->dp_typ
== 0)
1467 warnx("ERROR: size of partition is zero");
1470 /* Return if no adjustment is necessary. */
1471 if (start
% dos_sectors
== 0 && (start
+ size
) % dos_sectors
== 0)
1475 warnx("WARNING: partition overlaps with partition table");
1476 if (ok("Correct this automatically?"))
1477 start
= dos_sectors
;
1479 if (start
% dos_sectors
!= 0)
1480 warnx("WARNING: partition does not start on a head boundary");
1481 if ((start
+size
) % dos_sectors
!= 0)
1482 warnx("WARNING: partition does not end on a cylinder boundary");
1483 warnx("WARNING: this may confuse the BIOS or some operating systems");
1484 if (!ok("Correct this automatically?"))
1488 * Adjust start upwards, if necessary, to fall on an head boundary.
1490 if (start
% dos_sectors
!= 0) {
1491 prev_head_boundary
= start
/ dos_sectors
* dos_sectors
;
1492 if (max_end
< (uint32_t)dos_sectors
||
1493 prev_head_boundary
>= max_end
- dos_sectors
) {
1495 * Can't go past end of partition
1498 "ERROR: unable to adjust start of partition to fall on a head boundary");
1501 start
= prev_head_boundary
+ dos_sectors
;
1505 * Adjust size downwards, if necessary, to fall on a cylinder
1508 prev_cyl_boundary
= ((start
+ size
) / dos_cylsecs
) * dos_cylsecs
;
1509 if (prev_cyl_boundary
> start
)
1510 size
= prev_cyl_boundary
- start
;
1512 warnx("ERROR: could not adjust partition to start on a head boundary\n\
1513 and end on a cylinder boundary.");
1517 /* Finally, commit any changes to partp and return. */
1518 if (start
!= partp
->dp_start
) {
1519 warnx("WARNING: adjusting start offset of partition to %u",
1521 partp
->dp_start
= start
;
1523 if (size
!= partp
->dp_size
) {
1524 warnx("WARNING: adjusting size of partition to %u", (u_int
)size
);
1525 partp
->dp_size
= size
;