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 $
27 * $DragonFly: src/sbin/i386/fdisk/fdisk.c,v 1.16 2008/04/23 22:09:07 thomas Exp $
30 #include <sys/types.h>
31 #include <sys/diskslice.h>
32 #include <sys/diskmbr.h>
47 static char lbuf
[LBUF
];
53 * Ported to 386bsd by Julian Elischer Thu Oct 15 20:26:46 PDT 1992
55 * 14-Dec-89 Robert Baron (rvb) at Carnegie-Mellon University
56 * Copyright (c) 1989 Robert. V. Baron
60 #define Decimal(str, ans, tmp) if (decimal(str, &tmp, ans)) ans = tmp
61 #define Hex(str, ans, tmp) if (hex(str, &tmp, ans)) ans = tmp
62 #define String(str, ans, len) {char *z = ans; char **dflt = &z; if (string(str, dflt)) strncpy(ans, *dflt, len); }
64 #define RoundCyl(x) ((((x) + cylsecs - 1) / cylsecs) * cylsecs)
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 int secsize
= 0; /* the sensed sector size */
73 "/dev/ad0", "/dev/da0", "/dev/vkd0", 0
76 int cyls
, sectors
, heads
, cylsecs
;
81 unsigned char padding
[2]; /* force the longs to be long aligned */
82 unsigned char *bootinst
; /* boot code */
84 struct dos_partition parts
[4];
86 struct mboot mboot
= {{0}, NULL
, 0};
89 #define BOOT_MAGIC 0xAA55
96 #define DOSSECT(s,c) ((s & 0x3f) | ((c >> 2) & 0xc0))
97 #define DOSCYL(c) (c & 0xff)
99 static int partition
= -1;
104 static int current_line_number
;
106 static int geom_processed
= 0;
107 static int part_processed
= 0;
108 static int active_processed
= 0;
121 static int B_flag
= 0; /* replace boot code */
122 static int C_flag
= 0; /* use wrapped values for CHS */
123 static int I_flag
= 0; /* use entire disk for DragonFly */
124 static int a_flag
= 0; /* set active partition */
125 static char *b_flag
= NULL
; /* path to boot code */
126 static int i_flag
= 0; /* replace partition data */
127 static int u_flag
= 0; /* update partition data */
128 static int p_flag
= 0; /* operate on a disk image file */
129 static int s_flag
= 0; /* Print a summary and exit */
130 static int t_flag
= 0; /* test only */
131 static char *f_flag
= NULL
; /* Read config info from file */
132 static int v_flag
= 0; /* Be verbose */
141 ,{0x01, "Primary DOS with 12 bit FAT"}
142 ,{0x02, "XENIX / filesystem"}
143 ,{0x03, "XENIX /usr filesystem"}
144 ,{0x04, "Primary DOS with 16 bit FAT (<= 32MB)"}
145 ,{0x05, "Extended DOS"}
146 ,{0x06, "Primary 'big' DOS (> 32MB)"}
147 ,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"}
148 ,{0x08, "AIX filesystem"}
149 ,{0x09, "AIX boot partition or Coherent"}
150 ,{0x0A, "OS/2 Boot Manager or OPUS"}
151 ,{0x0B, "DOS or Windows 95 with 32 bit FAT"}
152 ,{0x0C, "DOS or Windows 95 with 32 bit FAT, LBA"}
153 ,{0x0E, "Primary 'big' DOS (> 32MB, LBA)"}
154 ,{0x0F, "Extended DOS, LBA"}
156 ,{0x11, "OS/2 BM: hidden DOS with 12-bit FAT"}
157 ,{0x12, "Compaq diagnostics"}
158 ,{0x14, "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)"}
159 ,{0x16, "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)"}
160 ,{0x17, "OS/2 BM: hidden IFS (e.g. HPFS)"}
161 ,{0x18, "AST Windows swapfile"}
164 ,{0x3C, "PartitionMagic recovery"}
166 ,{0x41, "Linux/MINIX (sharing disk with DRDOS)"}
167 ,{0x42, "SFS or Linux swap (sharing disk with DRDOS)"}
168 ,{0x43, "Linux native (sharing disk with DRDOS)"}
169 ,{0x4D, "QNX 4.2 Primary"}
170 ,{0x4E, "QNX 4.2 Secondary"}
171 ,{0x4F, "QNX 4.2 Tertiary"}
174 ,{0x52, "CP/M or Microport SysV/AT"}
177 ,{0x55, "EZ-Drive (disk manager)"}
179 ,{0x5C, "Priam Edisk (disk manager)"} /* according to S. Widlake */
181 ,{0x63, "ISC UNIX, other System V/386, GNU HURD or Mach"}
182 ,{0x64, "Novell Netware 2.xx"}
183 ,{0x65, "Novell Netware 3.xx"}
184 ,{0x70, "DiskSecure Multi-Boot"}
187 ,{0x78, "QNX4.x 2nd part"}
188 ,{0x79, "QNX4.x 3rd part"}
189 ,{0x80, "Minix 1.1 ... 1.4a"}
190 ,{0x81, "Minix 1.4b ... 1.5.10"}
191 ,{0x82, "Linux swap or Solaris x86"}
192 ,{0x83, "Linux filesystem"}
193 ,{0x84, "OS/2 hidden C: drive"}
194 ,{0x85, "Linux extended"}
195 ,{0x86, "NTFS volume set??"}
196 ,{0x87, "NTFS volume set??"}
197 ,{0x93, "Amoeba filesystem"}
198 ,{0x94, "Amoeba bad block table"}
200 ,{0xA0, "Suspend to Disk"}
201 ,{0xA5, "DragonFly/FreeBSD/NetBSD/386BSD"}
206 ,{0xB7, "BSDI BSD/386 filesystem"}
207 ,{0xB8, "BSDI BSD/386 swap"}
208 ,{0xBE, "Solaris x86 boot"}
209 ,{0xC1, "DRDOS/sec with 12-bit FAT"}
210 ,{0xC4, "DRDOS/sec with 16-bit FAT (< 32MB)"}
211 ,{0xC6, "DRDOS/sec with 16-bit FAT (>= 32MB)"}
213 ,{0xDB, "Concurrent CPM or C.DOS or CTOS"}
217 ,{0xEB, "BeOS file system"}
219 ,{0xEF, "EFI System Partition"}
221 ,{0xF2, "DOS 3.3+ Secondary"}
223 ,{0xFE, "SpeedStor >1024 cyl. or LANstep"}
224 ,{0xFF, "BBT (Bad Blocks Table)"}
227 static void print_s0(int which
);
228 static void print_part(int i
);
229 static void init_sector0(unsigned long start
);
230 static void init_boot(void);
231 static void change_part(int i
);
232 static void print_params();
233 static void change_active(int which
);
234 static void change_code();
235 static void get_params_to_use();
236 static void dos(struct dos_partition
*partp
);
237 static int open_disk(int u_flag
);
238 static ssize_t
read_disk(off_t sector
, void *buf
);
239 static ssize_t
write_disk(off_t sector
, void *buf
);
240 static int get_params();
241 static int read_s0();
242 static int write_s0();
243 static int ok(char *str
);
244 static int decimal(char *str
, int *num
, int deflt
);
245 static char *get_type(int type
);
246 static int read_config(char *config_file
);
247 static void reset_boot(void);
248 static int sanitize_partition(struct dos_partition
*);
249 static void usage(void);
251 static int hex(char *str
, int *num
, int deflt
);
252 static int string(char *str
, char **ans
);
257 main(int argc
, char *argv
[])
261 while ((c
= getopt(argc
, argv
, "BCIab:f:p:istuv1234")) != -1)
309 if (f_flag
|| i_flag
)
317 disk
= getdevpath(argv
[0], 0);
318 if (open_disk(u_flag
) < 0)
319 err(1, "cannot open disk %s", disk
);
320 } else if (disk
== NULL
) {
323 for(i
= 0; disks
[i
]; i
++)
326 rv
= open_disk(u_flag
);
330 err(1, "cannot open any disk");
332 if (open_disk(u_flag
) < 0)
333 err(1, "cannot open disk %s", disk
);
336 /* (abu)use mboot.bootinst to probe for the sector size */
337 if ((mboot
.bootinst
= malloc(MAX_SEC_SIZE
)) == NULL
)
338 err(1, "cannot allocate buffer to determine disk sector size");
339 read_disk(0, mboot
.bootinst
);
340 free(mboot
.bootinst
);
341 mboot
.bootinst
= NULL
;
346 struct dos_partition
*partp
;
350 printf("%s: %d cyl %d hd %d sec\n", disk
, dos_cyls
, dos_heads
,
352 printf("Part %11s %11s Type Flags\n", "Start", "Size");
353 for (i
= 0; i
< NDOSPART
; i
++) {
354 partp
= ((struct dos_partition
*) &mboot
.parts
) + i
;
355 if (partp
->dp_start
== 0 && partp
->dp_size
== 0)
357 printf("%4d: %11lu %11lu 0x%02x 0x%02x\n", i
+ 1,
358 (u_long
) partp
->dp_start
,
359 (u_long
) partp
->dp_size
, partp
->dp_typ
,
365 printf("******* Working on device %s *******\n",disk
);
369 struct dos_partition
*partp
;
373 partp
= (struct dos_partition
*) (&mboot
.parts
[0]);
374 partp
->dp_typ
= DOSPTYP_386BSD
;
375 partp
->dp_flag
= ACTIVE
;
376 partp
->dp_start
= dos_sectors
;
377 if (disksecs
- dos_sectors
> 0xFFFFFFFFU
) {
378 printf("Warning: Ending logical block > 2TB, using max value\n");
379 partp
->dp_size
= 0xFFFFFFFFU
;
381 partp
->dp_size
= (disksecs
/ dos_cylsecs
) *
382 dos_cylsecs
- dos_sectors
;
393 if (read_s0() || i_flag
)
398 if (!read_config(f_flag
))
423 init_sector0(dos_sectors
);
425 printf("Media sector size is %d\n", secsize
);
426 printf("Warning: BIOS sector numbering starts with sector 1\n");
427 printf("Information from DOS bootblock is:\n");
429 for (i
= 1; i
<= NDOSPART
; i
++)
432 change_part(partition
);
434 if (u_flag
|| a_flag
)
435 change_active(partition
);
440 if (u_flag
|| a_flag
|| B_flag
) {
442 printf("\nWe haven't changed the partition table yet. ");
443 printf("This is your last chance.\n");
447 if (ok("Should we write new partition table?"))
452 printf("\n-t flag specified -- partition table not written.\n");
463 fprintf(stderr
, "%s%s",
464 "usage: fdisk [-BCIaistu] [-b bootcode] [-p diskimage] [-1234] [disk]\n",
465 " fdisk -f configfile [-itv] [disk]\n");
475 printf("Information from DOS bootblock is:\n");
477 for (i
= 1; i
<= NDOSPART
; i
++)
478 printf("%d: ", i
), print_part(i
);
483 static struct dos_partition mtpart
= { 0 };
488 struct dos_partition
*partp
;
491 partp
= ((struct dos_partition
*) &mboot
.parts
) + i
- 1;
493 if (!bcmp(partp
, &mtpart
, sizeof (struct dos_partition
))) {
494 printf("<UNUSED>\n");
498 * Be careful not to overflow.
500 part_mb
= partp
->dp_size
;
502 part_mb
/= (1024 * 1024);
503 printf("sysid %d,(%s)\n", partp
->dp_typ
, get_type(partp
->dp_typ
));
504 printf(" start %lu, size %lu (%jd Meg), flag %x%s\n",
505 (u_long
)partp
->dp_start
,
506 (u_long
)partp
->dp_size
,
509 partp
->dp_flag
== ACTIVE
? " (active)" : "");
510 printf("\tbeg: cyl %d/ head %d/ sector %d;\n\tend: cyl %d/ head %d/ sector %d\n"
511 ,DPCYL(partp
->dp_scyl
, partp
->dp_ssect
)
513 ,DPSECT(partp
->dp_ssect
)
514 ,DPCYL(partp
->dp_ecyl
, partp
->dp_esect
)
516 ,DPSECT(partp
->dp_esect
));
527 fname
= b_flag
? b_flag
: "/boot/mbr";
528 if ((fd
= open(fname
, O_RDONLY
)) == -1 ||
529 fstat(fd
, &sb
) == -1)
531 if ((mboot
.bootinst_size
= sb
.st_size
) % secsize
!= 0)
532 errx(1, "%s: length must be a multiple of sector size", fname
);
533 if (mboot
.bootinst
!= NULL
)
534 free(mboot
.bootinst
);
535 if ((mboot
.bootinst
= malloc(mboot
.bootinst_size
= sb
.st_size
)) == NULL
)
536 errx(1, "%s: unable to allocate read buffer", fname
);
537 if ((n
= read(fd
, mboot
.bootinst
, mboot
.bootinst_size
)) == -1 ||
540 if (n
!= mboot
.bootinst_size
)
541 errx(1, "%s: short read", fname
);
546 init_sector0(unsigned long start
)
548 struct dos_partition
*partp
= (struct dos_partition
*) (&mboot
.parts
[3]);
552 partp
->dp_typ
= DOSPTYP_386BSD
;
553 partp
->dp_flag
= ACTIVE
;
554 start
= ((start
+ dos_sectors
- 1) / dos_sectors
) * dos_sectors
;
557 partp
->dp_start
= start
;
558 if (disksecs
- start
> 0xFFFFFFFFU
) {
559 printf("Warning: Ending logical block > 2TB, using max value\n");
560 partp
->dp_size
= 0xFFFFFFFFU
;
562 partp
->dp_size
= (disksecs
/ dos_cylsecs
) * dos_cylsecs
- start
;
571 struct dos_partition
*partp
= ((struct dos_partition
*) &mboot
.parts
) + i
- 1;
573 printf("The data for partition %d is:\n", i
);
576 if (u_flag
&& ok("Do you want to change it?")) {
580 bzero((char *)partp
, sizeof (struct dos_partition
));
583 printf("\nThe static data for the DOS partition 4 has been reinitialized to:\n");
589 Decimal("sysid (165=DragonFly)", partp
->dp_typ
, tmp
);
590 Decimal("start", partp
->dp_start
, tmp
);
591 Decimal("size", partp
->dp_size
, tmp
);
592 if (!sanitize_partition(partp
)) {
593 warnx("ERROR: failed to adjust; setting sysid to 0");
597 if (ok("Explicitly specify beg/end address ?"))
600 tcyl
= DPCYL(partp
->dp_scyl
,partp
->dp_ssect
);
602 tsec
= DPSECT(partp
->dp_ssect
);
603 Decimal("beginning cylinder", tcyl
, tmp
);
604 Decimal("beginning head", thd
, tmp
);
605 Decimal("beginning sector", tsec
, tmp
);
606 if (tcyl
> MAXCYL
&& C_flag
== 0) {
607 printf("Warning: starting cylinder wraps, using all 1's\n");
609 partp
->dp_ssect
= -1;
612 partp
->dp_scyl
= DOSCYL(tcyl
);
613 partp
->dp_ssect
= DOSSECT(tsec
,tcyl
);
617 tcyl
= DPCYL(partp
->dp_ecyl
,partp
->dp_esect
);
619 tsec
= DPSECT(partp
->dp_esect
);
620 Decimal("ending cylinder", tcyl
, tmp
);
621 Decimal("ending head", thd
, tmp
);
622 Decimal("ending sector", tsec
, tmp
);
623 if (tcyl
> MAXCYL
&& C_flag
== 0) {
624 printf("Warning: ending cylinder wraps, using all 1's\n");
626 partp
->dp_esect
= -1;
629 partp
->dp_ecyl
= DOSCYL(tcyl
);
630 partp
->dp_esect
= DOSSECT(tsec
,tcyl
);
637 } while (!ok("Are we happy with this entry?"));
644 printf("parameters extracted from device are:\n");
645 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
646 ,cyls
,heads
,sectors
,cylsecs
);
647 if((dos_sectors
> 63) || (dos_cyls
> 1023) || (dos_heads
> 255))
648 printf("Figures below won't work with BIOS for partitions not in cyl 1\n");
649 printf("parameters to be used for BIOS calculations are:\n");
650 printf("cylinders=%d heads=%d sectors/track=%d (%d blks/cyl)\n\n"
651 ,dos_cyls
,dos_heads
,dos_sectors
,dos_cylsecs
);
655 change_active(int which
)
657 struct dos_partition
*partp
= &mboot
.parts
[0];
658 int active
, i
, new, tmp
;
661 for (i
= 0; i
< NDOSPART
; i
++) {
662 if ((partp
[i
].dp_flag
& ACTIVE
) == 0)
664 printf("Partition %d is marked active\n", i
+ 1);
668 if (a_flag
&& which
!= -1)
670 else if (active
== -1)
673 if (!ok("Do you want to change the active partition?"))
678 Decimal("active partition", new, tmp
);
679 if (new < 1 || new > 4) {
680 printf("Active partition number must be in range 1-4."
685 } while (!ok("Are you happy with this choice"));
686 for (i
= 0; i
< NDOSPART
; i
++)
687 partp
[i
].dp_flag
= 0;
688 if (active
> 0 && active
<= NDOSPART
)
689 partp
[active
-1].dp_flag
= ACTIVE
;
695 if (ok("Do you want to change the boot code?"))
700 get_params_to_use(void)
704 if (ok("Do you want to change our idea of what BIOS thinks ?"))
708 Decimal("BIOS's idea of #cylinders", dos_cyls
, tmp
);
709 Decimal("BIOS's idea of #heads", dos_heads
, tmp
);
710 Decimal("BIOS's idea of #sectors", dos_sectors
, tmp
);
711 dos_cylsecs
= dos_heads
* dos_sectors
;
714 while(!ok("Are you happy with this choice"));
719 /***********************************************\
720 * Change real numbers into strange dos numbers *
721 \***********************************************/
723 dos(struct dos_partition
*partp
)
728 if (partp
->dp_typ
== 0 && partp
->dp_start
== 0 && partp
->dp_size
== 0) {
729 memcpy(partp
, &mtpart
, sizeof(*partp
));
734 cy
= partp
->dp_start
/ dos_cylsecs
;
735 sec
= partp
->dp_start
% dos_sectors
+ 1;
736 if (cy
> MAXCYL
&& C_flag
== 0) {
737 printf("Warning: starting cylinder wraps, using all 1's\n");
740 partp
->dp_ssect
= -1;
742 partp
->dp_shd
= partp
->dp_start
% dos_cylsecs
/ dos_sectors
;
743 partp
->dp_scyl
= DOSCYL(cy
);
744 partp
->dp_ssect
= DOSSECT(sec
, cy
);
748 end
= partp
->dp_start
+ partp
->dp_size
- 1;
749 cy
= end
/ dos_cylsecs
;
750 sec
= end
% dos_sectors
+ 1;
751 if (cy
> MAXCYL
&& C_flag
== 0) {
752 printf("Warning: ending cylinder wraps, using all 1's\n");
755 partp
->dp_esect
= -1;
757 partp
->dp_ehd
= end
% dos_cylsecs
/ dos_sectors
;
758 partp
->dp_ecyl
= DOSCYL(cy
);
759 partp
->dp_esect
= DOSSECT(sec
, cy
);
765 /* Getting device status */
768 open_disk(int u_flag
)
772 if (stat(disk
, &st
) == -1) {
775 warnx("can't get file status of %s", disk
);
778 if ( !(st
.st_mode
& S_IFCHR
) && p_flag
== 0 )
779 warnx("device %s is not character special", disk
);
781 a_flag
|| I_flag
|| B_flag
|| u_flag
? O_RDWR
: O_RDONLY
)) == -1) {
784 warnx("can't open device %s", disk
);
787 if (get_params() == -1) {
788 warnx("can't get disk parameters on %s", disk
);
795 read_disk(off_t sector
, void *buf
)
797 lseek(fd
,(sector
* 512), 0);
799 for( secsize
= MIN_SEC_SIZE
; secsize
<= MAX_SEC_SIZE
; secsize
*= 2 )
802 int size
= read(fd
, buf
, secsize
);
803 if( size
== secsize
)
804 /* it worked so return */
808 return read( fd
, buf
, secsize
);
810 /* we failed to read at any of the sizes */
815 write_disk(off_t sector
, void *buf
)
817 lseek(fd
,(sector
* 512), 0);
818 /* write out in the size that the read_disk found worked */
819 return write(fd
, buf
, secsize
);
825 struct partinfo partinfo
; /* disk parameters */
828 if (ioctl(fd
, DIOCGPART
, &partinfo
) == -1) {
829 if (p_flag
&& fstat(fd
, &st
) == 0 && st
.st_size
) {
832 cylsecs
= heads
* sectors
;
833 cyls
= st
.st_size
/ 512 / cylsecs
;
835 warnx("can't get disk parameters on %s; supplying dummy ones",
838 cylsecs
= heads
* sectors
;
841 cyls
= partinfo
.d_ncylinders
;
842 heads
= partinfo
.d_nheads
;
843 sectors
= partinfo
.d_secpertrack
;
844 cylsecs
= heads
* sectors
;
845 secsize
= partinfo
.media_blksize
;
849 dos_sectors
= sectors
;
850 dos_cylsecs
= cylsecs
;
851 disksecs
= (int64_t)cyls
* heads
* sectors
;
859 mboot
.bootinst_size
= secsize
;
860 if (mboot
.bootinst
!= NULL
)
861 free(mboot
.bootinst
);
862 if ((mboot
.bootinst
= malloc(mboot
.bootinst_size
)) == NULL
) {
863 warnx("unable to allocate buffer to read fdisk "
867 if (read_disk(0, mboot
.bootinst
) == -1) {
868 warnx("can't read fdisk partition table");
871 if (*(uint16_t *)&mboot
.bootinst
[MBRSIGOFF
] != BOOT_MAGIC
) {
872 warnx("invalid fdisk partition table found");
873 /* So should we initialize things */
876 memcpy(mboot
.parts
, &mboot
.bootinst
[DOSPARTOFF
], sizeof(mboot
.parts
));
892 memcpy(&mboot
.bootinst
[DOSPARTOFF
], mboot
.parts
, sizeof(mboot
.parts
));
894 * write enable label sector before write (if necessary),
895 * disable after writing.
896 * needed if the disklabel protected area also protects
897 * sector 0. (e.g. empty disk)
901 if (ioctl(fd
, DIOCWLABEL
, &flag
) < 0)
902 warn("ioctl DIOCWLABEL");
904 for(sector
= 0; sector
< mboot
.bootinst_size
/ secsize
; sector
++)
905 if (write_disk(sector
,
906 &mboot
.bootinst
[sector
* secsize
]) == -1) {
907 warn("can't write fdisk partition table");
911 ioctl(fd
, DIOCWLABEL
, &flag
);
916 ioctl(fd
, DIOCWLABEL
, &flag
);
925 printf("%s [n] ", str
);
927 if (fgets(lbuf
, LBUF
, stdin
) == NULL
)
929 lbuf
[strlen(lbuf
)-1] = 0;
932 (!strcmp(lbuf
, "yes") || !strcmp(lbuf
, "YES") ||
933 !strcmp(lbuf
, "y") || !strcmp(lbuf
, "Y")))
940 decimal(char *str
, int *num
, int deflt
)
946 printf("Supply a decimal value for \"%s\" [%d] ", str
, deflt
);
948 if (fgets(lbuf
, LBUF
, stdin
) == NULL
)
950 lbuf
[strlen(lbuf
)-1] = 0;
956 while ((c
= *cp
) && (c
== ' ' || c
== '\t')) cp
++;
959 while ((c
= *cp
++)) {
960 if (c
<= '9' && c
>= '0')
961 acc
= acc
* 10 + c
- '0';
965 if (c
== ' ' || c
== '\t')
966 while ((c
= *cp
) && (c
== ' ' || c
== '\t')) cp
++;
971 printf("%s is an invalid decimal number. Try again.\n",
979 hex(char *str
, int *num
, int deflt
)
985 printf("Supply a hex value for \"%s\" [%x] ", str
, deflt
);
986 fgets(lbuf
, LBUF
, stdin
);
987 lbuf
[strlen(lbuf
)-1] = 0;
993 while ((c
= *cp
) && (c
== ' ' || c
== '\t')) cp
++;
996 while ((c
= *cp
++)) {
997 if (c
<= '9' && c
>= '0')
998 acc
= (acc
<< 4) + c
- '0';
999 else if (c
<= 'f' && c
>= 'a')
1000 acc
= (acc
<< 4) + c
- 'a' + 10;
1001 else if (c
<= 'F' && c
>= 'A')
1002 acc
= (acc
<< 4) + c
- 'A' + 10;
1006 if (c
== ' ' || c
== '\t')
1007 while ((c
= *cp
) && (c
== ' ' || c
== '\t')) cp
++;
1012 printf("%s is an invalid hex number. Try again.\n",
1019 string(char *str
, char **ans
)
1025 printf("Supply a string value for \"%s\" [%s] ", str
, *ans
);
1026 fgets(lbuf
, LBUF
, stdin
);
1027 lbuf
[strlen(lbuf
)-1] = 0;
1032 while ((c
= *cp
) && (c
== ' ' || c
== '\t')) cp
++;
1036 while ((c
= *cp
) && c
!= '"') cp
++;
1039 while ((c
= *cp
) && c
!= ' ' && c
!= '\t') cp
++;
1052 int numentries
= (sizeof(part_types
)/sizeof(struct part_type
));
1054 struct part_type
*ptr
= part_types
;
1057 while(counter
< numentries
)
1059 if(ptr
->type
== type
)
1071 parse_config_line(char *line
, CMD
*command
)
1076 while (1) /* dirty trick used to insure one exit point for this
1079 memset(command
, 0, sizeof(*command
));
1081 while (isspace(*cp
)) ++cp
;
1082 if (*cp
== '\0' || *cp
== '#')
1086 command
->cmd
= *cp
++;
1093 while (isspace(*cp
)) ++cp
;
1096 break; /* found comment */
1100 command
->args
[command
->n_args
].argtype
= *cp
++;
1104 break; /* assume end of line */
1107 command
->args
[command
->n_args
].arg_val
= strtol(cp
, &end
, 0);
1110 break; /* couldn't parse number */
1121 process_geometry(CMD
*command
)
1131 "ERROR line %d: the geometry specification line must occur before\n\
1132 all partition specifications",
1133 current_line_number
);
1137 if (command
->n_args
!= 3)
1139 warnx("ERROR line %d: incorrect number of geometry args",
1140 current_line_number
);
1147 for (i
= 0; i
< 3; ++i
)
1149 switch (command
->args
[i
].argtype
)
1152 dos_cyls
= command
->args
[i
].arg_val
;
1155 dos_heads
= command
->args
[i
].arg_val
;
1158 dos_sectors
= command
->args
[i
].arg_val
;
1162 "ERROR line %d: unknown geometry arg type: '%c' (0x%02x)",
1163 current_line_number
, command
->args
[i
].argtype
,
1164 command
->args
[i
].argtype
);
1174 dos_cylsecs
= dos_heads
* dos_sectors
;
1177 * Do sanity checks on parameter values
1181 warnx("ERROR line %d: number of cylinders not specified",
1182 current_line_number
);
1185 if (dos_cyls
== 0 || dos_cyls
> 1024)
1188 "WARNING line %d: number of cylinders (%d) may be out-of-range\n\
1189 (must be within 1-1024 for normal BIOS operation, unless the entire disk\n\
1190 is dedicated to DragonFly)",
1191 current_line_number
, dos_cyls
);
1196 warnx("ERROR line %d: number of heads not specified",
1197 current_line_number
);
1200 else if (dos_heads
< 1 || dos_heads
> 256)
1202 warnx("ERROR line %d: number of heads must be within (1-256)",
1203 current_line_number
);
1207 if (dos_sectors
< 0)
1209 warnx("ERROR line %d: number of sectors not specified",
1210 current_line_number
);
1213 else if (dos_sectors
< 1 || dos_sectors
> 63)
1215 warnx("ERROR line %d: number of sectors must be within (1-63)",
1216 current_line_number
);
1227 process_partition(CMD
*command
)
1229 int status
= 0, partition
;
1230 u_int32_t prev_head_boundary
, prev_cyl_boundary
;
1231 u_int32_t adj_size
, max_end
;
1232 struct dos_partition
*partp
;
1237 if (command
->n_args
!= 4)
1239 warnx("ERROR line %d: incorrect number of partition args",
1240 current_line_number
);
1243 partition
= command
->args
[0].arg_val
;
1244 if (partition
< 1 || partition
> 4)
1246 warnx("ERROR line %d: invalid partition number %d",
1247 current_line_number
, partition
);
1250 partp
= ((struct dos_partition
*) &mboot
.parts
) + partition
- 1;
1251 bzero((char *)partp
, sizeof (struct dos_partition
));
1252 partp
->dp_typ
= command
->args
[1].arg_val
;
1253 partp
->dp_start
= command
->args
[2].arg_val
;
1254 partp
->dp_size
= command
->args
[3].arg_val
;
1255 max_end
= partp
->dp_start
+ partp
->dp_size
;
1257 if (partp
->dp_typ
== 0)
1260 * Get out, the partition is marked as unused.
1263 * Insure that it's unused.
1265 bzero((char *)partp
, sizeof (struct dos_partition
));
1271 * Adjust start upwards, if necessary, to fall on an head boundary.
1273 if (partp
->dp_start
% dos_sectors
!= 0)
1275 prev_head_boundary
= partp
->dp_start
/ dos_sectors
* dos_sectors
;
1276 if (max_end
< dos_sectors
||
1277 prev_head_boundary
> max_end
- dos_sectors
)
1280 * Can't go past end of partition
1283 "ERROR line %d: unable to adjust start of partition %d to fall on\n\
1285 current_line_number
, partition
);
1289 "WARNING: adjusting start offset of partition %d\n\
1290 from %u to %u, to fall on a head boundary",
1291 partition
, (u_int
)partp
->dp_start
,
1292 (u_int
)(prev_head_boundary
+ dos_sectors
));
1293 partp
->dp_start
= prev_head_boundary
+ dos_sectors
;
1297 * Adjust size downwards, if necessary, to fall on a cylinder
1301 ((partp
->dp_start
+ partp
->dp_size
) / dos_cylsecs
) * dos_cylsecs
;
1302 if (prev_cyl_boundary
> partp
->dp_start
)
1303 adj_size
= prev_cyl_boundary
- partp
->dp_start
;
1307 "ERROR: could not adjust partition to start on a head boundary\n\
1308 and end on a cylinder boundary.");
1311 if (adj_size
!= partp
->dp_size
)
1314 "WARNING: adjusting size of partition %d from %u to %u\n\
1315 to end on a cylinder boundary",
1316 partition
, (u_int
)partp
->dp_size
, (u_int
)adj_size
);
1317 partp
->dp_size
= adj_size
;
1319 if (partp
->dp_size
== 0)
1321 warnx("ERROR line %d: size of partition %d is zero",
1322 current_line_number
, partition
);
1335 process_active(CMD
*command
)
1337 int status
= 0, partition
, i
;
1338 struct dos_partition
*partp
;
1342 active_processed
= 1;
1343 if (command
->n_args
!= 1)
1345 warnx("ERROR line %d: incorrect number of active args",
1346 current_line_number
);
1350 partition
= command
->args
[0].arg_val
;
1351 if (partition
< 1 || partition
> 4)
1353 warnx("ERROR line %d: invalid partition number %d",
1354 current_line_number
, partition
);
1358 * Reset active partition
1360 partp
= ((struct dos_partition
*) &mboot
.parts
);
1361 for (i
= 0; i
< NDOSPART
; i
++)
1362 partp
[i
].dp_flag
= 0;
1363 partp
[partition
-1].dp_flag
= ACTIVE
;
1373 process_line(char *line
)
1380 parse_config_line(line
, &command
);
1381 switch (command
.cmd
)
1385 * Comment or blank line
1392 status
= process_geometry(&command
);
1395 status
= process_partition(&command
);
1398 status
= process_active(&command
);
1411 read_config(char *config_file
)
1417 while (1) /* dirty trick used to insure one exit point for this
1420 if (strcmp(config_file
, "-") != 0)
1423 * We're not reading from stdin
1425 if ((fp
= fopen(config_file
, "r")) == NULL
)
1435 current_line_number
= 0;
1438 if (fgets(buf
, sizeof(buf
), fp
) == NULL
)
1442 ++current_line_number
;
1443 status
= process_line(buf
);
1454 * It doesn't matter if we're reading from stdin, as we've reached EOF
1466 struct dos_partition
*partp
;
1469 for (i
= 0; i
< 4; ++i
)
1471 partp
= ((struct dos_partition
*) &mboot
.parts
) + i
;
1472 bzero((char *)partp
, sizeof (struct dos_partition
));
1477 sanitize_partition(struct dos_partition
*partp
)
1479 u_int32_t prev_head_boundary
, prev_cyl_boundary
;
1480 u_int32_t max_end
, size
, start
;
1482 start
= partp
->dp_start
;
1483 size
= partp
->dp_size
;
1484 max_end
= start
+ size
;
1485 /* Only allow a zero size if the partition is being marked unused. */
1487 if (start
== 0 && partp
->dp_typ
== 0)
1489 warnx("ERROR: size of partition is zero");
1492 /* Return if no adjustment is necessary. */
1493 if (start
% dos_sectors
== 0 && (start
+ size
) % dos_sectors
== 0)
1497 warnx("WARNING: partition overlaps with partition table");
1498 if (ok("Correct this automatically?"))
1499 start
= dos_sectors
;
1501 if (start
% dos_sectors
!= 0)
1502 warnx("WARNING: partition does not start on a head boundary");
1503 if ((start
+size
) % dos_sectors
!= 0)
1504 warnx("WARNING: partition does not end on a cylinder boundary");
1505 warnx("WARNING: this may confuse the BIOS or some operating systems");
1506 if (!ok("Correct this automatically?"))
1510 * Adjust start upwards, if necessary, to fall on an head boundary.
1512 if (start
% dos_sectors
!= 0) {
1513 prev_head_boundary
= start
/ dos_sectors
* dos_sectors
;
1514 if (max_end
< dos_sectors
||
1515 prev_head_boundary
>= max_end
- dos_sectors
) {
1517 * Can't go past end of partition
1520 "ERROR: unable to adjust start of partition to fall on a head boundary");
1523 start
= prev_head_boundary
+ dos_sectors
;
1527 * Adjust size downwards, if necessary, to fall on a cylinder
1530 prev_cyl_boundary
= ((start
+ size
) / dos_cylsecs
) * dos_cylsecs
;
1531 if (prev_cyl_boundary
> start
)
1532 size
= prev_cyl_boundary
- start
;
1534 warnx("ERROR: could not adjust partition to start on a head boundary\n\
1535 and end on a cylinder boundary.");
1539 /* Finally, commit any changes to partp and return. */
1540 if (start
!= partp
->dp_start
) {
1541 warnx("WARNING: adjusting start offset of partition to %u",
1543 partp
->dp_start
= start
;
1545 if (size
!= partp
->dp_size
) {
1546 warnx("WARNING: adjusting size of partition to %u", (u_int
)size
);
1547 partp
->dp_size
= size
;