1 /* vi: set sw=4 ts=4: */
2 /* fdisk.c -- Partition table manipulator for Linux.
4 * Copyright (C) 1992 A. V. Le Blanc (LeBlanc@mcc.ac.uk)
5 * Copyright (C) 2001,2002 Vladimir Oleynik <dzo@simtreas.ru> (initial bb port)
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
10 //config: bool "fdisk (41 kb)"
12 //config: select PLATFORM_LINUX
14 //config: The fdisk utility is used to divide hard disks into one or more
15 //config: logical disks, which are generally called partitions. This utility
16 //config: can be used to list and edit the set of partitions or BSD style
17 //config: 'disk slices' that are defined on a hard drive.
19 //config:config FDISK_SUPPORT_LARGE_DISKS
20 //config: bool "Support over 4GB disks"
22 //config: depends on FDISK
23 //config: depends on !LFS # with LFS no special code is needed
25 //config:config FEATURE_FDISK_WRITABLE
26 //config: bool "Write support"
28 //config: depends on FDISK
30 //config: Enabling this option allows you to create or change a partition table
31 //config: and write those changes out to disk. If you leave this option
32 //config: disabled, you will only be able to view the partition table.
34 //config:config FEATURE_AIX_LABEL
35 //config: bool "Support AIX disklabels"
37 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
39 //config: Enabling this option allows you to create or change AIX disklabels.
40 //config: Most people can safely leave this option disabled.
42 //config:config FEATURE_SGI_LABEL
43 //config: bool "Support SGI disklabels"
45 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
47 //config: Enabling this option allows you to create or change SGI disklabels.
48 //config: Most people can safely leave this option disabled.
50 //config:config FEATURE_SUN_LABEL
51 //config: bool "Support SUN disklabels"
53 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
55 //config: Enabling this option allows you to create or change SUN disklabels.
56 //config: Most people can safely leave this option disabled.
58 //config:config FEATURE_OSF_LABEL
59 //config: bool "Support BSD disklabels"
61 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
63 //config: Enabling this option allows you to create or change BSD disklabels
64 //config: and define and edit BSD disk slices.
66 //config:config FEATURE_GPT_LABEL
67 //config: bool "Support GPT disklabels"
69 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
71 //config: Enabling this option allows you to view GUID Partition Table
74 //config:config FEATURE_FDISK_ADVANCED
75 //config: bool "Support expert mode"
77 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
79 //config: Enabling this option allows you to do terribly unsafe things like
80 //config: define arbitrary drive geometry, move the beginning of data in a
81 //config: partition, and similarly evil things. Unless you have a very good
82 //config: reason you would be wise to leave this disabled.
84 //applet:IF_FDISK(APPLET(fdisk, BB_DIR_SBIN, BB_SUID_DROP))
86 //kbuild:lib-$(CONFIG_FDISK) += fdisk.o
88 /* Looks like someone forgot to add this to config system */
89 //usage:#ifndef ENABLE_FEATURE_FDISK_BLKSIZE
90 //usage:# define ENABLE_FEATURE_FDISK_BLKSIZE 0
91 //usage:# define IF_FEATURE_FDISK_BLKSIZE(a)
94 //usage:#define fdisk_trivial_usage
95 //usage: "[-ul" IF_FEATURE_FDISK_BLKSIZE("s") "] "
96 //usage: "[-C CYLINDERS] [-H HEADS] [-S SECTORS] [-b SSZ] DISK"
97 //usage:#define fdisk_full_usage "\n\n"
98 //usage: "Change partition table\n"
99 //usage: "\n -u Start and End are in sectors (instead of cylinders)"
100 //usage: "\n -l Show partition table for each DISK, then exit"
101 //usage: IF_FEATURE_FDISK_BLKSIZE(
102 //usage: "\n -s Show partition sizes in kb for each DISK, then exit"
104 //usage: "\n -b 2048 (for certain MO disks) use 2048-byte sectors"
105 //usage: "\n -C CYLINDERS Set number of cylinders/heads/sectors"
106 //usage: "\n -H HEADS Typically 255"
107 //usage: "\n -S SECTORS Typically 63"
109 #ifndef _LARGEFILE64_SOURCE
111 # define _LARGEFILE64_SOURCE
113 #include <assert.h> /* assert */
114 #include <sys/mount.h>
115 #if !defined(BLKSSZGET)
116 # define BLKSSZGET _IO(0x12, 104)
118 #if !defined(BLKGETSIZE64)
119 # define BLKGETSIZE64 _IOR(0x12,114,size_t)
125 # define inline_if_little_endian ALWAYS_INLINE
127 # define inline_if_little_endian /* nothing */
131 /* Looks like someone forgot to add this to config system */
132 #ifndef ENABLE_FEATURE_FDISK_BLKSIZE
133 # define ENABLE_FEATURE_FDISK_BLKSIZE 0
134 # define IF_FEATURE_FDISK_BLKSIZE(a)
137 #define DEFAULT_SECTOR_SIZE 512
138 #define DEFAULT_SECTOR_SIZE_STR "512"
139 #define MAX_SECTOR_SIZE 2048
140 #define SECTOR_SIZE 512 /* still used in osf/sgi/sun code */
141 #define MAXIMUM_PARTS 60
143 #define ACTIVE_FLAG 0x80
145 #define EXTENDED 0x05
146 #define WIN98_EXTENDED 0x0f
147 #define LINUX_PARTITION 0x81
148 #define LINUX_SWAP 0x82
149 #define LINUX_NATIVE 0x83
150 #define LINUX_EXTENDED 0x85
151 #define LINUX_LVM 0x8e
152 #define LINUX_RAID 0xfd
162 OPT_s = (1 << 6) * ENABLE_FEATURE_FDISK_BLKSIZE,
166 typedef unsigned long long ullong;
167 /* Used for sector numbers. Partition formats we know
168 * do not support more than 2^32 sectors
170 typedef uint32_t sector_t;
171 #if UINT_MAX == 4294967295
173 #elif ULONG_MAX == 4294967295
174 # define SECT_FMT "l"
176 # error Cant detect sizeof(uint32_t)
181 unsigned char sectors;
182 unsigned short cylinders;
186 #define HDIO_GETGEO 0x0301 /* get device geometry */
188 /* TODO: #if ENABLE_FEATURE_FDISK_WRITABLE */
189 /* (currently fdisk_sun/sgi.c do not have proper WRITABLE #ifs) */
190 static const char msg_building_new_label[] ALIGN1 =
191 "Building a new %s. Changes will remain in memory only,\n"
192 "until you decide to write them. After that the previous content\n"
193 "won't be recoverable.\n\n";
195 static const char msg_part_already_defined[] ALIGN1 =
196 "Partition %u is already defined, delete it before re-adding\n";
201 unsigned char boot_ind; /* 0x80 - active */
202 unsigned char head; /* starting head */
203 unsigned char sector; /* starting sector */
204 unsigned char cyl; /* starting cylinder */
205 unsigned char sys_ind; /* what partition type */
206 unsigned char end_head; /* end head */
207 unsigned char end_sector; /* end sector */
208 unsigned char end_cyl; /* end cylinder */
209 unsigned char start4[4]; /* starting sector counting from 0 */
210 unsigned char size4[4]; /* nr of sectors in partition */
214 * per partition table entry data
216 * The four primary partitions have the same sectorbuffer (MBRbuffer)
217 * and have NULL ext_pointer.
218 * Each logical partition table entry has two pointers, one for the
219 * partition and one link to the next one.
222 struct partition *part_table; /* points into sectorbuffer */
223 struct partition *ext_pointer; /* points into sectorbuffer */
224 sector_t offset_from_dev_start; /* disk sector number */
225 char *sectorbuffer; /* disk sector contents */
226 #if ENABLE_FEATURE_FDISK_WRITABLE
227 char changed; /* boolean */
231 #define unable_to_open "can't open '%s'"
232 #define unable_to_read "can't read from %s"
233 #define unable_to_seek "can't seek on %s"
236 LABEL_DOS, LABEL_SUN, LABEL_SGI, LABEL_AIX, LABEL_OSF, LABEL_GPT
239 #define LABEL_IS_DOS (LABEL_DOS == current_label_type)
241 #if ENABLE_FEATURE_SUN_LABEL
242 #define LABEL_IS_SUN (LABEL_SUN == current_label_type)
243 #define STATIC_SUN static
245 #define LABEL_IS_SUN 0
246 #define STATIC_SUN extern
249 #if ENABLE_FEATURE_SGI_LABEL
250 #define LABEL_IS_SGI (LABEL_SGI == current_label_type)
251 #define STATIC_SGI static
253 #define LABEL_IS_SGI 0
254 #define STATIC_SGI extern
257 #if ENABLE_FEATURE_AIX_LABEL
258 #define LABEL_IS_AIX (LABEL_AIX == current_label_type)
259 #define STATIC_AIX static
261 #define LABEL_IS_AIX 0
262 #define STATIC_AIX extern
265 #if ENABLE_FEATURE_OSF_LABEL
266 #define LABEL_IS_OSF (LABEL_OSF == current_label_type)
267 #define STATIC_OSF static
269 #define LABEL_IS_OSF 0
270 #define STATIC_OSF extern
273 #if ENABLE_FEATURE_GPT_LABEL
274 #define LABEL_IS_GPT (LABEL_GPT == current_label_type)
275 #define STATIC_GPT static
277 #define LABEL_IS_GPT 0
278 #define STATIC_GPT extern
281 enum action { OPEN_MAIN, TRY_ONLY, CREATE_EMPTY_DOS, CREATE_EMPTY_SUN };
283 static void update_units(void);
284 #if ENABLE_FEATURE_FDISK_WRITABLE
285 static void change_units(void);
286 static void reread_partition_table(int leave);
287 static void delete_partition(int i);
288 static unsigned get_partition(int warn, unsigned max);
289 static void list_types(const char *const *sys);
290 static sector_t read_int(sector_t low, sector_t dflt, sector_t high, sector_t base, const char *mesg);
292 static const char *partition_type(unsigned char type);
293 static void get_geometry(void);
294 static void read_pte(struct pte *pe, sector_t offset);
295 #if ENABLE_FEATURE_SUN_LABEL || ENABLE_FEATURE_FDISK_WRITABLE
296 static int get_boot(enum action what);
298 static int get_boot(void);
304 static sector_t get_start_sect(const struct partition *p);
305 static sector_t get_nr_sects(const struct partition *p);
307 /* DOS partition types */
309 static const char *const i386_sys_types[] = {
313 "\x05" "Extended", /* DOS 3.3+ extended partition */
314 "\x06" "FAT16", /* DOS 16-bit >=32M */
315 "\x07" "HPFS/NTFS", /* OS/2 IFS, eg, HPFS or NTFS or QNX */
316 "\x0a" "OS/2 Boot Manager",/* OS/2 Boot Manager */
317 "\x0b" "Win95 FAT32",
318 "\x0c" "Win95 FAT32 (LBA)",/* LBA really is 'Extended Int 13h' */
319 "\x0e" "Win95 FAT16 (LBA)",
320 "\x0f" "Win95 Ext'd (LBA)",
321 "\x11" "Hidden FAT12",
322 "\x12" "Compaq diagnostics",
323 "\x14" "Hidden FAT16 <32M",
324 "\x16" "Hidden FAT16",
325 "\x17" "Hidden HPFS/NTFS",
326 "\x1b" "Hidden Win95 FAT32",
327 "\x1c" "Hidden W95 FAT32 (LBA)",
328 "\x1e" "Hidden W95 FAT16 (LBA)",
329 "\x3c" "Part.Magic recovery",
330 "\x41" "PPC PReP Boot",
332 "\x63" "GNU HURD or SysV", /* GNU HURD or Mach or Sys V/386 (such as ISC UNIX) */
333 "\x80" "Old Minix", /* Minix 1.4a and earlier */
334 "\x81" "Minix / old Linux",/* Minix 1.4b and later */
335 "\x82" "Linux swap", /* also Solaris */
337 "\x84" "OS/2 hidden C: drive",
338 "\x85" "Linux extended",
339 "\x86" "NTFS volume set",
340 "\x87" "NTFS volume set",
342 "\x9f" "BSD/OS", /* BSDI */
343 "\xa0" "Thinkpad hibernation",
344 "\xa5" "FreeBSD", /* various BSD flavours */
348 "\xab" "Darwin boot",
351 "\xbe" "Solaris boot",
353 "\xee" "EFI GPT", /* Intel EFI GUID Partition Table */
354 "\xef" "EFI (FAT-12/16/32)", /* Intel EFI System Partition */
355 "\xf0" "Linux/PA-RISC boot", /* Linux/PA-RISC boot loader */
356 "\xf2" "DOS secondary", /* DOS 3.3+ secondary */
357 "\xfd" "Linux raid autodetect", /* New (2.2.x) raid partition with
358 autodetect using persistent
360 #if 0 /* ENABLE_WEIRD_PARTITION_TYPES */
363 "\x08" "AIX", /* AIX boot (AIX -- PS/2 port) or SplitDrive */
364 "\x09" "AIX bootable", /* AIX data or Coherent */
366 "\x18" "AST SmartSleep",
369 "\x40" "Venix 80286",
371 "\x4e" "QNX4.x 2nd part",
372 "\x4f" "QNX4.x 3rd part",
374 "\x51" "OnTrack DM6 Aux1", /* (or Novell) */
375 "\x52" "CP/M", /* CP/M or Microport SysV/AT */
376 "\x53" "OnTrack DM6 Aux3",
380 "\x5c" "Priam Edisk",
382 "\x64" "Novell Netware 286",
383 "\x65" "Novell Netware 386",
384 "\x70" "DiskSecure Multi-Boot",
387 "\x94" "Amoeba BBT", /* (bad block table) */
389 "\xbb" "Boot Wizard hidden",
390 "\xc1" "DRDOS/sec (FAT-12)",
391 "\xc4" "DRDOS/sec (FAT-16 < 32M)",
392 "\xc6" "DRDOS/sec (FAT-16)",
394 "\xda" "Non-FS data",
395 "\xdb" "CP/M / CTOS / ...",/* CP/M or Concurrent CP/M or
396 Concurrent DOS or CTOS */
397 "\xde" "Dell Utility", /* Dell PowerEdge Server utilities */
398 "\xdf" "BootIt", /* BootIt EMBRM */
399 "\xe1" "DOS access", /* DOS access or SpeedStor 12-bit FAT
400 extended partition */
401 "\xe3" "DOS R/O", /* DOS R/O or SpeedStor */
402 "\xe4" "SpeedStor", /* SpeedStor 16-bit FAT extended
403 partition < 1024 cyl. */
405 "\xf4" "SpeedStor", /* SpeedStor large partition */
406 "\xfe" "LANstep", /* SpeedStor >1024 cyl. or LANstep */
407 "\xff" "BBT", /* Xenix Bad Block Table */
413 dev_fd = 3 /* the disk */
420 const char *disk_device;
421 int g_partitions; // = 4; /* maximum partition + 1 */
422 unsigned units_per_sector; // = 1;
423 unsigned sector_size; // = DEFAULT_SECTOR_SIZE;
424 unsigned user_set_sector_size;
425 unsigned sector_offset; // = 1;
426 unsigned g_heads, g_sectors, g_cylinders;
427 smallint /* enum label_type */ current_label_type;
428 smallint display_in_cyl_units; // = 1;
429 #if ENABLE_FEATURE_OSF_LABEL
430 smallint possibly_osf_label;
433 smallint listing; /* no aborts for fdisk -l */
434 smallint dos_compatible_flag; // = 1;
435 #if ENABLE_FEATURE_FDISK_WRITABLE
437 smallint nowarn; /* no warnings for fdisk -l/-s */
439 int ext_index; /* the prime extended partition */
440 unsigned user_cylinders, user_heads, user_sectors;
441 unsigned pt_heads, pt_sectors;
442 unsigned kern_heads, kern_sectors;
443 sector_t extended_offset; /* offset of link pointers */
444 sector_t total_number_of_sectors;
447 char line_buffer[80];
448 /* Raw disk label. For DOS-type partition tables the MBR,
449 * with descriptions of the primary partitions. */
450 char MBRbuffer[MAX_SECTOR_SIZE];
451 /* Partition tables */
452 struct pte ptes[MAXIMUM_PARTS];
454 #define G (*ptr_to_globals)
455 #define line_ptr (G.line_ptr )
456 #define disk_device (G.disk_device )
457 #define g_partitions (G.g_partitions )
458 #define units_per_sector (G.units_per_sector )
459 #define sector_size (G.sector_size )
460 #define user_set_sector_size (G.user_set_sector_size)
461 #define sector_offset (G.sector_offset )
462 #define g_heads (G.g_heads )
463 #define g_sectors (G.g_sectors )
464 #define g_cylinders (G.g_cylinders )
465 #define current_label_type (G.current_label_type )
466 #define display_in_cyl_units (G.display_in_cyl_units)
467 #define possibly_osf_label (G.possibly_osf_label )
468 #define listing (G.listing )
469 #define dos_compatible_flag (G.dos_compatible_flag )
470 #define nowarn (G.nowarn )
471 #define ext_index (G.ext_index )
472 #define user_cylinders (G.user_cylinders )
473 #define user_heads (G.user_heads )
474 #define user_sectors (G.user_sectors )
475 #define pt_heads (G.pt_heads )
476 #define pt_sectors (G.pt_sectors )
477 #define kern_heads (G.kern_heads )
478 #define kern_sectors (G.kern_sectors )
479 #define extended_offset (G.extended_offset )
480 #define total_number_of_sectors (G.total_number_of_sectors)
481 #define listingbuf (G.listingbuf )
482 #define line_buffer (G.line_buffer )
483 #define MBRbuffer (G.MBRbuffer )
484 #define ptes (G.ptes )
485 #define INIT_G() do { \
486 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
487 sector_size = DEFAULT_SECTOR_SIZE; \
490 display_in_cyl_units = 1; \
491 units_per_sector = 1; \
492 dos_compatible_flag = 1; \
496 /* TODO: move to libbb? */
497 /* TODO: return unsigned long long, FEATURE_FDISK_BLKSIZE _can_ handle
498 * disks > 2^32 sectors
500 static sector_t bb_BLKGETSIZE_sectors(int fd)
503 unsigned long longsectors;
505 if (ioctl(fd, BLKGETSIZE64, &v64) == 0) {
506 /* Got bytes, convert to 512 byte sectors */
508 if (v64 != (sector_t)v64) {
510 /* Not only DOS, but all other partition tables
511 * we support can't record more than 32 bit
512 * sector counts or offsets
514 bb_error_msg("device has more than 2^32 sectors, can't use all of them");
519 /* Needs temp of type long */
520 if (ioctl(fd, BLKGETSIZE, &longsectors)) {
521 /* Perhaps this is a disk image */
522 off_t sz = lseek(fd, 0, SEEK_END);
525 longsectors = (uoff_t)sz / sector_size;
526 lseek(fd, 0, SEEK_SET);
528 if (sizeof(long) > sizeof(sector_t)
529 && longsectors != (sector_t)longsectors
537 #define IS_EXTENDED(i) \
538 ((i) == EXTENDED || (i) == WIN98_EXTENDED || (i) == LINUX_EXTENDED)
540 #define cround(n) (display_in_cyl_units ? ((n)/units_per_sector)+1 : (n))
542 #define scround(x) (((x)+units_per_sector-1)/units_per_sector)
544 #define pt_offset(b, n) \
545 ((struct partition *)((b) + 0x1be + (n) * sizeof(struct partition)))
547 #define sector(s) ((s) & 0x3f)
549 #define cylinder(s, c) ((c) | (((s) & 0xc0) << 2))
554 /* Not really closing, but making sure it is open, and to harmless place */
555 xmove_fd(xopen(bb_dev_null, O_RDONLY), dev_fd);
558 /* Return partition name */
560 partname(const char *dev, int pno, int lth)
567 bufp = auto_string(xzalloc(80));
573 if (isdigit(dev[w-1]))
576 /* devfs kludge - note: fdisk partition names are not supposed
577 to equal kernel names, so there is no reason to do this */
578 if (strcmp(dev + w - 4, "disc") == 0) {
586 snprintf(bufp, bufsiz, "%*.*s%s%-2u",
587 lth-wp-2, w, dev, p, pno);
589 snprintf(bufp, bufsiz, "%.*s%s%-2u", w, dev, p, pno);
594 static ALWAYS_INLINE struct partition *
595 get_part_table(int i)
597 return ptes[i].part_table;
602 { /* n==1: use singular */
604 return display_in_cyl_units ? "cylinder" : "sector";
605 return display_in_cyl_units ? "cylinders" : "sectors";
609 valid_part_table_flag(const char *mbuffer)
611 return (mbuffer[510] == 0x55 && (uint8_t)mbuffer[511] == 0xaa);
614 static void fdisk_fatal(const char *why)
618 longjmp(listingbuf, 1);
620 bb_error_msg_and_die(why, disk_device);
624 seek_sector(sector_t secno)
626 #if ENABLE_FDISK_SUPPORT_LARGE_DISKS
627 off64_t off = (off64_t)secno * sector_size;
628 if (lseek64(dev_fd, off, SEEK_SET) == (off64_t) -1)
629 fdisk_fatal(unable_to_seek);
631 uint64_t off = (uint64_t)secno * sector_size;
632 if (off > MAXINT(off_t)
633 || lseek(dev_fd, (off_t)off, SEEK_SET) == (off_t) -1
635 fdisk_fatal(unable_to_seek);
640 #if ENABLE_FEATURE_FDISK_WRITABLE
641 /* Read line; return 0 or first printable char */
643 read_line(const char *prompt)
647 sz = read_line_input(NULL, prompt, line_buffer, sizeof(line_buffer), /*timeout*/ -1);
649 exit(EXIT_SUCCESS); /* Ctrl-D or Ctrl-C */
651 if (line_buffer[sz-1] == '\n')
652 line_buffer[--sz] = '\0';
654 line_ptr = line_buffer;
655 while (*line_ptr != '\0' && (unsigned char)*line_ptr <= ' ')
661 set_all_unchanged(void)
665 for (i = 0; i < MAXIMUM_PARTS; i++)
669 static ALWAYS_INLINE void
675 static ALWAYS_INLINE void
676 write_part_table_flag(char *b)
683 read_nonempty(const char *mesg)
685 while (!read_line(mesg))
691 read_maybe_empty(const char *mesg)
693 if (!read_line(mesg)) {
694 line_ptr = line_buffer;
702 read_hex(const char *const *sys)
706 read_nonempty("Hex code (type L to list codes): ");
707 if ((line_ptr[0] | 0x20) == 'l') {
711 v = bb_strtoul(line_ptr, NULL, 16);
718 write_sector(sector_t secno, const void *buf)
721 xwrite(dev_fd, buf, sector_size);
723 #endif /* FEATURE_FDISK_WRITABLE */
726 #include "fdisk_aix.c"
728 struct sun_partition {
729 unsigned char info[128]; /* Informative text string */
730 unsigned char spare0[14];
732 unsigned char spare1;
734 unsigned char spare2;
737 unsigned char spare1[246]; /* Boot information etc. */
738 unsigned short rspeed; /* Disk rotational speed */
739 unsigned short pcylcount; /* Physical cylinder count */
740 unsigned short sparecyl; /* extra sects per cylinder */
741 unsigned char spare2[4]; /* More magic... */
742 unsigned short ilfact; /* Interleave factor */
743 unsigned short ncyl; /* Data cylinder count */
744 unsigned short nacyl; /* Alt. cylinder count */
745 unsigned short ntrks; /* Tracks per cylinder */
746 unsigned short nsect; /* Sectors per track */
747 unsigned char spare3[4]; /* Even more magic... */
748 struct sun_partinfo {
749 uint32_t start_cylinder;
750 uint32_t num_sectors;
752 unsigned short magic; /* Magic number */
753 unsigned short csum; /* Label xor'd checksum */
755 typedef struct sun_partition sun_partition;
756 #define sunlabel ((sun_partition *)MBRbuffer)
757 STATIC_OSF void bsd_select(void);
758 STATIC_OSF void xbsd_print_disklabel(int);
759 #include "fdisk_osf.c"
761 STATIC_GPT void gpt_list_table(int xtra);
762 #include "fdisk_gpt.c"
764 #if ENABLE_FEATURE_SGI_LABEL || ENABLE_FEATURE_SUN_LABEL
766 fdisk_swap16(uint16_t x)
768 return (x << 8) | (x >> 8);
772 fdisk_swap32(uint32_t x)
775 ((x & 0xFF00) << 8) |
776 ((x & 0xFF0000) >> 8) |
781 STATIC_SGI const char *const sgi_sys_types[];
782 STATIC_SGI unsigned sgi_get_num_sectors(int i);
783 STATIC_SGI int sgi_get_sysid(int i);
784 STATIC_SGI void sgi_delete_partition(int i);
785 STATIC_SGI void sgi_change_sysid(int i, int sys);
786 STATIC_SGI void sgi_list_table(int xtra);
787 #if ENABLE_FEATURE_FDISK_ADVANCED
788 STATIC_SGI void sgi_set_xcyl(void);
790 STATIC_SGI int verify_sgi(int verbose);
791 STATIC_SGI void sgi_add_partition(int n, int sys);
792 STATIC_SGI void sgi_set_swappartition(int i);
793 STATIC_SGI const char *sgi_get_bootfile(void);
794 STATIC_SGI void sgi_set_bootfile(const char* aFile);
795 STATIC_SGI void create_sgiinfo(void);
796 STATIC_SGI void sgi_write_table(void);
797 STATIC_SGI void sgi_set_bootpartition(int i);
798 #include "fdisk_sgi.c"
800 STATIC_SUN const char *const sun_sys_types[];
801 STATIC_SUN void sun_delete_partition(int i);
802 STATIC_SUN void sun_change_sysid(int i, int sys);
803 STATIC_SUN void sun_list_table(int xtra);
804 STATIC_SUN void add_sun_partition(int n, int sys);
805 #if ENABLE_FEATURE_FDISK_ADVANCED
806 STATIC_SUN void sun_set_alt_cyl(void);
807 STATIC_SUN void sun_set_ncyl(int cyl);
808 STATIC_SUN void sun_set_xcyl(void);
809 STATIC_SUN void sun_set_ilfact(void);
810 STATIC_SUN void sun_set_rspeed(void);
811 STATIC_SUN void sun_set_pcylcount(void);
813 STATIC_SUN void toggle_sunflags(int i, unsigned char mask);
814 STATIC_SUN void verify_sun(void);
815 STATIC_SUN void sun_write_table(void);
816 #include "fdisk_sun.c"
819 static inline_if_little_endian unsigned
820 read4_little_endian(const unsigned char *cp)
823 move_from_unaligned32(v, cp);
828 get_start_sect(const struct partition *p)
830 return read4_little_endian(p->start4);
834 get_nr_sects(const struct partition *p)
836 return read4_little_endian(p->size4);
839 #if ENABLE_FEATURE_FDISK_WRITABLE
840 /* start_sect and nr_sects are stored little endian on all machines */
841 /* moreover, they are not aligned correctly */
842 static inline_if_little_endian void
843 store4_little_endian(unsigned char *cp, unsigned val)
845 uint32_t v = SWAP_LE32(val);
846 move_to_unaligned32(cp, v);
850 set_start_sect(struct partition *p, unsigned start_sect)
852 store4_little_endian(p->start4, start_sect);
856 set_nr_sects(struct partition *p, unsigned nr_sects)
858 store4_little_endian(p->size4, nr_sects);
862 /* Allocate a buffer and read a partition table sector */
864 read_pte(struct pte *pe, sector_t offset)
866 pe->offset_from_dev_start = offset;
867 pe->sectorbuffer = xzalloc(sector_size);
869 /* xread would make us abort - bad for fdisk -l */
870 if (full_read(dev_fd, pe->sectorbuffer, sector_size) != sector_size)
871 fdisk_fatal(unable_to_read);
872 #if ENABLE_FEATURE_FDISK_WRITABLE
875 pe->part_table = pe->ext_pointer = NULL;
879 get_partition_start_from_dev_start(const struct pte *pe)
881 return pe->offset_from_dev_start + get_start_sect(pe->part_table);
884 #if ENABLE_FEATURE_FDISK_WRITABLE
886 * Avoid warning about DOS partitions when no DOS partition was changed.
887 * Here a heuristic "is probably dos partition".
888 * We might also do the opposite and warn in all cases except
889 * for "is probably nondos partition".
893 is_dos_partition(int t)
895 return (t == 1 || t == 4 || t == 6 ||
896 t == 0x0b || t == 0x0c || t == 0x0e ||
897 t == 0x11 || t == 0x12 || t == 0x14 || t == 0x16 ||
898 t == 0x1b || t == 0x1c || t == 0x1e || t == 0x24 ||
899 t == 0xc1 || t == 0xc4 || t == 0xc6);
906 puts("Command Action");
908 puts("a\ttoggle a read only flag"); /* sun */
909 puts("b\tedit bsd disklabel");
910 puts("c\ttoggle the mountable flag"); /* sun */
911 puts("d\tdelete a partition");
912 puts("l\tlist known partition types");
913 puts("n\tadd a new partition");
914 puts("o\tcreate a new empty DOS partition table");
915 puts("p\tprint the partition table");
916 puts("q\tquit without saving changes");
917 puts("s\tcreate a new empty Sun disklabel"); /* sun */
918 puts("t\tchange a partition's system id");
919 puts("u\tchange display/entry units");
920 puts("v\tverify the partition table");
921 puts("w\twrite table to disk and exit");
922 #if ENABLE_FEATURE_FDISK_ADVANCED
923 puts("x\textra functionality (experts only)");
925 } else if (LABEL_IS_SGI) {
926 puts("a\tselect bootable partition"); /* sgi flavour */
927 puts("b\tedit bootfile entry"); /* sgi */
928 puts("c\tselect sgi swap partition"); /* sgi flavour */
929 puts("d\tdelete a partition");
930 puts("l\tlist known partition types");
931 puts("n\tadd a new partition");
932 puts("o\tcreate a new empty DOS partition table");
933 puts("p\tprint the partition table");
934 puts("q\tquit without saving changes");
935 puts("s\tcreate a new empty Sun disklabel"); /* sun */
936 puts("t\tchange a partition's system id");
937 puts("u\tchange display/entry units");
938 puts("v\tverify the partition table");
939 puts("w\twrite table to disk and exit");
940 } else if (LABEL_IS_AIX) {
941 puts("o\tcreate a new empty DOS partition table");
942 puts("q\tquit without saving changes");
943 puts("s\tcreate a new empty Sun disklabel"); /* sun */
944 } else if (LABEL_IS_GPT) {
945 puts("o\tcreate a new empty DOS partition table");
946 puts("p\tprint the partition table");
947 puts("q\tquit without saving changes");
948 puts("s\tcreate a new empty Sun disklabel"); /* sun */
950 puts("a\ttoggle a bootable flag");
951 puts("b\tedit bsd disklabel");
952 puts("c\ttoggle the dos compatibility flag");
953 puts("d\tdelete a partition");
954 puts("l\tlist known partition types");
955 puts("n\tadd a new partition");
956 puts("o\tcreate a new empty DOS partition table");
957 puts("p\tprint the partition table");
958 puts("q\tquit without saving changes");
959 puts("s\tcreate a new empty Sun disklabel"); /* sun */
960 puts("t\tchange a partition's system id");
961 puts("u\tchange display/entry units");
962 puts("v\tverify the partition table");
963 puts("w\twrite table to disk and exit");
964 #if ENABLE_FEATURE_FDISK_ADVANCED
965 puts("x\textra functionality (experts only)");
969 #endif /* FEATURE_FDISK_WRITABLE */
972 #if ENABLE_FEATURE_FDISK_ADVANCED
976 puts("Command Action");
978 puts("a\tchange number of alternate cylinders"); /*sun*/
979 puts("c\tchange number of cylinders");
980 puts("d\tprint the raw data in the partition table");
981 puts("e\tchange number of extra sectors per cylinder");/*sun*/
982 puts("h\tchange number of heads");
983 puts("i\tchange interleave factor"); /*sun*/
984 puts("o\tchange rotation speed (rpm)"); /*sun*/
985 puts("p\tprint the partition table");
986 puts("q\tquit without saving changes");
987 puts("r\treturn to main menu");
988 puts("s\tchange number of sectors/track");
989 puts("v\tverify the partition table");
990 puts("w\twrite table to disk and exit");
991 puts("y\tchange number of physical cylinders"); /*sun*/
992 } else if (LABEL_IS_SGI) {
993 puts("b\tmove beginning of data in a partition"); /* !sun */
994 puts("c\tchange number of cylinders");
995 puts("d\tprint the raw data in the partition table");
996 puts("e\tlist extended partitions"); /* !sun */
997 puts("g\tcreate an IRIX (SGI) partition table");/* sgi */
998 puts("h\tchange number of heads");
999 puts("p\tprint the partition table");
1000 puts("q\tquit without saving changes");
1001 puts("r\treturn to main menu");
1002 puts("s\tchange number of sectors/track");
1003 puts("v\tverify the partition table");
1004 puts("w\twrite table to disk and exit");
1005 } else if (LABEL_IS_AIX) {
1006 puts("b\tmove beginning of data in a partition"); /* !sun */
1007 puts("c\tchange number of cylinders");
1008 puts("d\tprint the raw data in the partition table");
1009 puts("e\tlist extended partitions"); /* !sun */
1010 puts("g\tcreate an IRIX (SGI) partition table");/* sgi */
1011 puts("h\tchange number of heads");
1012 puts("p\tprint the partition table");
1013 puts("q\tquit without saving changes");
1014 puts("r\treturn to main menu");
1015 puts("s\tchange number of sectors/track");
1016 puts("v\tverify the partition table");
1017 puts("w\twrite table to disk and exit");
1019 puts("b\tmove beginning of data in a partition"); /* !sun */
1020 puts("c\tchange number of cylinders");
1021 puts("d\tprint the raw data in the partition table");
1022 puts("e\tlist extended partitions"); /* !sun */
1023 puts("f\tfix partition order"); /* !sun, !aix, !sgi */
1024 #if ENABLE_FEATURE_SGI_LABEL
1025 puts("g\tcreate an IRIX (SGI) partition table");/* sgi */
1027 puts("h\tchange number of heads");
1028 puts("p\tprint the partition table");
1029 puts("q\tquit without saving changes");
1030 puts("r\treturn to main menu");
1031 puts("s\tchange number of sectors/track");
1032 puts("v\tverify the partition table");
1033 puts("w\twrite table to disk and exit");
1036 #endif /* ADVANCED mode */
1038 #if ENABLE_FEATURE_FDISK_WRITABLE
1039 static const char *const *
1043 LABEL_IS_SUN ? sun_sys_types :
1044 LABEL_IS_SGI ? sgi_sys_types :
1048 #define get_sys_types() i386_sys_types
1052 partition_type(unsigned char type)
1055 const char *const *types = get_sys_types();
1057 for (i = 0; types[i]; i++)
1058 if ((unsigned char)types[i][0] == type)
1059 return types[i] + 1;
1065 is_cleared_partition(const struct partition *p)
1067 /* We consider partition "cleared" only if it has only zeros */
1068 const char *cp = (const char *)p;
1069 int cnt = sizeof(*p);
1077 clear_partition(struct partition *p)
1080 memset(p, 0, sizeof(*p));
1083 #if ENABLE_FEATURE_FDISK_WRITABLE
1087 return LABEL_IS_SUN ? sunlabel->infos[i].id :
1088 (LABEL_IS_SGI ? sgi_get_sysid(i) :
1089 ptes[i].part_table->sys_ind);
1093 list_types(const char *const *sys)
1097 unsigned last[COLS];
1098 unsigned done, next, size;
1101 for (size = 0; sys[size]; size++)
1105 for (i = COLS-1; i >= 0; i--) {
1106 done += (size + i - done) / (i + 1);
1107 last[COLS-1 - i] = done;
1110 i = done = next = 0;
1112 printf("%c%2x %-22.22s", i ? ' ' : '\n',
1113 (unsigned char)sys[next][0],
1115 next = last[i++] + done;
1116 if (i >= COLS || next >= last[i]) {
1120 } while (done < last[0]);
1124 #define set_hsc(h, s, c, sector) do \
1126 s = sector % g_sectors + 1; \
1127 sector /= g_sectors; \
1128 h = sector % g_heads; \
1129 sector /= g_heads; \
1130 c = sector & 0xff; \
1131 s |= (sector >> 2) & 0xc0; \
1134 static void set_hsc_start_end(struct partition *p, sector_t start, sector_t stop)
1136 if (dos_compatible_flag && (start / (g_sectors * g_heads) > 1023))
1137 start = g_heads * g_sectors * 1024 - 1;
1138 set_hsc(p->head, p->sector, p->cyl, start);
1140 if (dos_compatible_flag && (stop / (g_sectors * g_heads) > 1023))
1141 stop = g_heads * g_sectors * 1024 - 1;
1142 set_hsc(p->end_head, p->end_sector, p->end_cyl, stop);
1146 set_partition(int i, int doext, sector_t start, sector_t stop, int sysid)
1148 struct partition *p;
1152 p = ptes[i].ext_pointer;
1153 offset = extended_offset;
1155 p = ptes[i].part_table;
1156 offset = ptes[i].offset_from_dev_start;
1160 set_start_sect(p, start - offset);
1161 set_nr_sects(p, stop - start + 1);
1162 set_hsc_start_end(p, start, stop);
1163 ptes[i].changed = 1;
1170 if (g_heads && g_sectors && g_cylinders)
1173 printf("Unknown value(s) for:");
1179 printf(" cylinders");
1180 #if ENABLE_FEATURE_FDISK_WRITABLE
1181 puts(" (settable in the extra functions menu)");
1191 int cyl_units = g_heads * g_sectors;
1193 if (display_in_cyl_units && cyl_units)
1194 units_per_sector = cyl_units;
1196 units_per_sector = 1; /* in sectors */
1199 #if ENABLE_FEATURE_FDISK_WRITABLE
1201 warn_cylinders(void)
1203 if (LABEL_IS_DOS && g_cylinders > 1024 && !nowarn)
1205 "The number of cylinders for this disk is set to %u.\n"
1206 "There is nothing wrong with that, but this is larger than 1024,\n"
1207 "and could in certain setups cause problems with:\n"
1208 "1) software that runs at boot time (e.g., old versions of LILO)\n"
1209 "2) booting and partitioning software from other OSs\n"
1210 " (e.g., DOS FDISK, OS/2 FDISK)\n",
1216 read_extended(int ext)
1220 struct partition *p, *q;
1224 pex->ext_pointer = pex->part_table;
1226 p = pex->part_table;
1227 if (!get_start_sect(p)) {
1228 puts("Bad offset in primary extended partition");
1232 while (IS_EXTENDED(p->sys_ind)) {
1233 struct pte *pe = &ptes[g_partitions];
1235 if (g_partitions >= MAXIMUM_PARTS) {
1236 /* This is not a Linux restriction, but
1237 this program uses arrays of size MAXIMUM_PARTS.
1238 Do not try to 'improve' this test. */
1239 struct pte *pre = &ptes[g_partitions - 1];
1240 #if ENABLE_FEATURE_FDISK_WRITABLE
1241 printf("Warning: deleting partitions after %u\n",
1245 clear_partition(pre->ext_pointer);
1249 read_pte(pe, extended_offset + get_start_sect(p));
1251 if (!extended_offset)
1252 extended_offset = get_start_sect(p);
1254 q = p = pt_offset(pe->sectorbuffer, 0);
1255 for (i = 0; i < 4; i++, p++) if (get_nr_sects(p)) {
1256 if (IS_EXTENDED(p->sys_ind)) {
1257 if (pe->ext_pointer)
1258 printf("Warning: extra link "
1259 "pointer in partition table"
1260 " %u\n", g_partitions + 1);
1262 pe->ext_pointer = p;
1263 } else if (p->sys_ind) {
1265 printf("Warning: ignoring extra "
1266 "data in partition table"
1267 " %u\n", g_partitions + 1);
1273 /* very strange code here... */
1274 if (!pe->part_table) {
1275 if (q != pe->ext_pointer)
1278 pe->part_table = q + 1;
1280 if (!pe->ext_pointer) {
1281 if (q != pe->part_table)
1282 pe->ext_pointer = q;
1284 pe->ext_pointer = q + 1;
1287 p = pe->ext_pointer;
1291 #if ENABLE_FEATURE_FDISK_WRITABLE
1292 /* remove empty links */
1294 for (i = 4; i < g_partitions; i++) {
1295 struct pte *pe = &ptes[i];
1297 if (!get_nr_sects(pe->part_table)
1298 && (g_partitions > 5 || ptes[4].part_table->sys_ind)
1300 printf("Omitting empty partition (%u)\n", i+1);
1301 delete_partition(i);
1302 goto remove; /* numbering changed */
1308 #if ENABLE_FEATURE_FDISK_WRITABLE
1310 create_doslabel(void)
1312 printf(msg_building_new_label, "DOS disklabel");
1314 current_label_type = LABEL_DOS;
1315 #if ENABLE_FEATURE_OSF_LABEL
1316 possibly_osf_label = 0;
1320 memset(&MBRbuffer[510 - 4*16], 0, 4*16);
1321 write_part_table_flag(MBRbuffer);
1322 extended_offset = 0;
1323 set_all_unchanged();
1325 get_boot(CREATE_EMPTY_DOS);
1330 get_sectorsize(void)
1332 if (!user_set_sector_size) {
1334 if (ioctl(dev_fd, BLKSSZGET, &arg) == 0)
1336 if (sector_size != DEFAULT_SECTOR_SIZE)
1337 printf("Note: sector size is %u "
1338 "(not " DEFAULT_SECTOR_SIZE_STR ")\n",
1344 get_kernel_geometry(void)
1346 struct hd_geometry geometry;
1348 if (!ioctl(dev_fd, HDIO_GETGEO, &geometry)) {
1349 kern_heads = geometry.heads;
1350 kern_sectors = geometry.sectors;
1351 /* never use geometry.cylinders - it is truncated */
1356 get_partition_table_geometry(void)
1358 const unsigned char *bufp = (const unsigned char *)MBRbuffer;
1359 struct partition *p;
1360 int i, h, s, hh, ss;
1364 if (!(valid_part_table_flag((char*)bufp)))
1368 for (i = 0; i < 4; i++) {
1369 p = pt_offset(bufp, i);
1370 if (p->sys_ind != 0) {
1371 h = p->end_head + 1;
1372 s = (p->end_sector & 077);
1377 } else if (hh != h || ss != s)
1382 if (!first && !bad) {
1394 sec_fac = sector_size / 512;
1395 #if ENABLE_FEATURE_SUN_LABEL
1396 guess_device_type();
1398 g_heads = g_cylinders = g_sectors = 0;
1399 kern_heads = kern_sectors = 0;
1400 pt_heads = pt_sectors = 0;
1402 get_kernel_geometry();
1403 get_partition_table_geometry();
1405 g_heads = user_heads ? user_heads :
1406 pt_heads ? pt_heads :
1407 kern_heads ? kern_heads : 255;
1408 g_sectors = user_sectors ? user_sectors :
1409 pt_sectors ? pt_sectors :
1410 kern_sectors ? kern_sectors : 63;
1411 total_number_of_sectors = bb_BLKGETSIZE_sectors(dev_fd);
1414 if (dos_compatible_flag)
1415 sector_offset = g_sectors;
1417 g_cylinders = total_number_of_sectors / (g_heads * g_sectors * sec_fac);
1419 g_cylinders = user_cylinders;
1423 * Opens disk_device and optionally reads MBR.
1424 * If what == OPEN_MAIN:
1425 * Open device, read MBR. Abort program on short read. Create empty
1426 * disklabel if the on-disk structure is invalid (WRITABLE mode).
1427 * If what == TRY_ONLY:
1428 * Open device, read MBR. Return an error if anything is out of place.
1429 * Do not create an empty disklabel. This is used for the "list"
1430 * operations: "fdisk -l /dev/sda" and "fdisk -l" (all devices).
1431 * If what == CREATE_EMPTY_*:
1432 * This means that get_boot() was called recursively from create_*label().
1433 * Do not re-open the device; just set up the ptes array and print
1434 * geometry warnings.
1437 * -1: no 0xaa55 flag present (possibly entire disk BSD)
1438 * 0: found or created label
1441 #if ENABLE_FEATURE_SUN_LABEL || ENABLE_FEATURE_FDISK_WRITABLE
1442 static int get_boot(enum action what)
1444 static int get_boot(void)
1445 #define get_boot(what) get_boot()
1451 for (i = 0; i < 4; i++) {
1452 struct pte *pe = &ptes[i];
1453 pe->part_table = pt_offset(MBRbuffer, i);
1454 pe->ext_pointer = NULL;
1455 pe->offset_from_dev_start = 0;
1456 pe->sectorbuffer = MBRbuffer;
1457 #if ENABLE_FEATURE_FDISK_WRITABLE
1458 pe->changed = (what == CREATE_EMPTY_DOS);
1462 #if ENABLE_FEATURE_FDISK_WRITABLE
1463 // ALERT! highly idiotic design!
1464 // We end up here when we call get_boot() recursively
1465 // via get_boot() [table is bad] -> create_doslabel() -> get_boot(CREATE_EMPTY_DOS).
1466 // or get_boot() [table is bad] -> create_sunlabel() -> get_boot(CREATE_EMPTY_SUN).
1467 // (just factor out re-init of ptes[0,1,2,3] in a separate fn instead?)
1468 // So skip opening device _again_...
1469 if (what == CREATE_EMPTY_DOS IF_FEATURE_SUN_LABEL(|| what == CREATE_EMPTY_SUN))
1472 fd = open(disk_device, (option_mask32 & OPT_l) ? O_RDONLY : O_RDWR);
1475 fd = open(disk_device, O_RDONLY);
1477 if (what == TRY_ONLY)
1479 fdisk_fatal(unable_to_open);
1481 printf("'%s' is opened for read only\n", disk_device);
1483 xmove_fd(fd, dev_fd);
1484 if (512 != full_read(dev_fd, MBRbuffer, 512)) {
1485 if (what == TRY_ONLY) {
1489 fdisk_fatal(unable_to_read);
1492 fd = open(disk_device, O_RDONLY);
1495 if (512 != full_read(fd, MBRbuffer, 512)) {
1499 xmove_fd(fd, dev_fd);
1505 #if ENABLE_FEATURE_SUN_LABEL
1506 if (check_sun_label())
1509 #if ENABLE_FEATURE_SGI_LABEL
1510 if (check_sgi_label())
1513 #if ENABLE_FEATURE_AIX_LABEL
1514 if (check_aix_label())
1517 #if ENABLE_FEATURE_GPT_LABEL
1518 if (check_gpt_label())
1521 #if ENABLE_FEATURE_OSF_LABEL
1522 if (check_osf_label()) {
1523 possibly_osf_label = 1;
1524 if (!valid_part_table_flag(MBRbuffer)) {
1525 current_label_type = LABEL_OSF;
1528 puts("This disk has both DOS and BSD magic.\n"
1529 "Give the 'b' command to go to BSD mode.");
1533 #if !ENABLE_FEATURE_FDISK_WRITABLE
1534 if (!valid_part_table_flag(MBRbuffer))
1537 if (!valid_part_table_flag(MBRbuffer)) {
1538 if (what == OPEN_MAIN) {
1539 puts("Device contains neither a valid DOS "
1540 "partition table, nor Sun, SGI, OSF or GPT "
1543 IF_FEATURE_SUN_LABEL(create_sunlabel();)
1553 #endif /* FEATURE_FDISK_WRITABLE */
1556 IF_FEATURE_FDISK_WRITABLE(warn_cylinders();)
1559 for (i = 0; i < 4; i++) {
1560 if (IS_EXTENDED(ptes[i].part_table->sys_ind)) {
1561 if (g_partitions != 4)
1562 printf("Ignoring extra extended "
1563 "partition %u\n", i + 1);
1569 for (i = 3; i < g_partitions; i++) {
1570 struct pte *pe = &ptes[i];
1571 if (!valid_part_table_flag(pe->sectorbuffer)) {
1572 printf("Warning: invalid flag 0x%02x,0x%02x of partition "
1573 "table %u will be corrected by w(rite)\n",
1574 pe->sectorbuffer[510],
1575 pe->sectorbuffer[511],
1577 IF_FEATURE_FDISK_WRITABLE(pe->changed = 1;)
1584 #if ENABLE_FEATURE_FDISK_WRITABLE
1586 * Print the message MESG, then read an integer between LOW and HIGH (inclusive).
1587 * If the user hits Enter, DFLT is returned.
1588 * Answers like +10 are interpreted as offsets from BASE.
1590 * There is no default if DFLT is not between LOW and HIGH.
1593 read_int(sector_t low, sector_t dflt, sector_t high, sector_t base, const char *mesg)
1597 const char *fmt = "%s (%u-%u, default %u): ";
1599 if (dflt < low || dflt > high) {
1600 fmt = "%s (%u-%u): ";
1605 int use_default = default_ok;
1607 /* ask question and read answer */
1609 printf(fmt, mesg, low, high, dflt);
1610 read_maybe_empty("");
1611 } while (*line_ptr != '\n' && !isdigit(*line_ptr)
1612 && *line_ptr != '-' && *line_ptr != '+');
1614 if (*line_ptr == '+' || *line_ptr == '-') {
1615 int minus = (*line_ptr == '-');
1618 value = atoi(line_ptr + 1);
1620 /* (1) if 2nd char is digit, use_default = 0.
1621 * (2) move line_ptr to first non-digit. */
1622 while (isdigit(*++line_ptr))
1625 switch (*line_ptr) {
1628 if (!display_in_cyl_units)
1629 value *= g_heads * g_sectors;
1643 absolute = 1000000000;
1652 bytes = (ullong) value * absolute;
1653 unit = sector_size * units_per_sector;
1654 bytes += unit/2; /* round */
1662 value = atoi(line_ptr);
1663 while (isdigit(*line_ptr)) {
1670 printf("Using default value %u\n", value);
1672 if (value >= low && value <= high)
1674 puts("Value is out of range");
1680 get_partition(int warn, unsigned max)
1685 i = read_int(1, 0, max, 0, "Partition number") - 1;
1689 if ((!LABEL_IS_SUN && !LABEL_IS_SGI && !pe->part_table->sys_ind)
1690 || (LABEL_IS_SUN && (!sunlabel->partitions[i].num_sectors || !sunlabel->infos[i].id))
1691 || (LABEL_IS_SGI && !sgi_get_num_sectors(i))
1693 printf("Warning: partition %u has empty type\n", i+1);
1700 get_existing_partition(int warn, unsigned max)
1705 for (i = 0; i < max; i++) {
1706 struct pte *pe = &ptes[i];
1707 struct partition *p = pe->part_table;
1709 if (p && !is_cleared_partition(p)) {
1716 printf("Selected partition %u\n", pno+1);
1719 puts("No partition is defined yet!");
1723 return get_partition(warn, max);
1727 get_nonexisting_partition(int warn, unsigned max)
1732 for (i = 0; i < max; i++) {
1733 struct pte *pe = &ptes[i];
1734 struct partition *p = pe->part_table;
1736 if (p && is_cleared_partition(p)) {
1743 printf("Selected partition %u\n", pno+1);
1746 puts("All primary partitions have been defined already!");
1750 return get_partition(warn, max);
1757 display_in_cyl_units = !display_in_cyl_units;
1759 printf("Changing display/entry units to %s\n",
1764 toggle_active(int i)
1766 struct pte *pe = &ptes[i];
1767 struct partition *p = pe->part_table;
1769 if (IS_EXTENDED(p->sys_ind) && !p->boot_ind)
1770 printf("WARNING: Partition %u is an extended partition\n", i + 1);
1771 p->boot_ind = (p->boot_ind ? 0 : ACTIVE_FLAG);
1776 toggle_dos_compatibility_flag(void)
1778 dos_compatible_flag = 1 - dos_compatible_flag;
1779 if (dos_compatible_flag) {
1780 sector_offset = g_sectors;
1781 printf("DOS Compatibility flag is %sset\n", "");
1784 printf("DOS Compatibility flag is %sset\n", "not ");
1789 delete_partition(int i)
1791 struct pte *pe = &ptes[i];
1792 struct partition *p = pe->part_table;
1793 struct partition *q = pe->ext_pointer;
1795 /* Note that for the fifth partition (i == 4) we don't actually
1796 * decrement partitions.
1799 if (warn_geometry())
1800 return; /* C/H/S not set */
1804 sun_delete_partition(i);
1808 sgi_delete_partition(i);
1813 if (IS_EXTENDED(p->sys_ind) && i == ext_index) {
1815 ptes[ext_index].ext_pointer = NULL;
1816 extended_offset = 0;
1822 if (!q->sys_ind && i > 4) {
1823 /* the last one in the chain - just delete */
1826 clear_partition(ptes[i].ext_pointer);
1827 ptes[i].changed = 1;
1829 /* not the last one - further ones will be moved down */
1831 /* delete this link in the chain */
1832 p = ptes[i-1].ext_pointer;
1834 set_start_sect(p, get_start_sect(q));
1835 set_nr_sects(p, get_nr_sects(q));
1836 ptes[i-1].changed = 1;
1837 } else if (g_partitions > 5) { /* 5 will be moved to 4 */
1838 /* the first logical in a longer chain */
1841 if (pe->part_table) /* prevent SEGFAULT */
1842 set_start_sect(pe->part_table,
1843 get_partition_start_from_dev_start(pe) -
1845 pe->offset_from_dev_start = extended_offset;
1849 if (g_partitions > 5) {
1851 while (i < g_partitions) {
1852 ptes[i] = ptes[i+1];
1856 /* the only logical: clear only */
1857 clear_partition(ptes[i].part_table);
1865 int i, sys, origsys;
1866 struct partition *p;
1868 /* If sgi_label then don't use get_existing_partition,
1869 let the user select a partition, since get_existing_partition()
1870 only works for Linux like partition tables. */
1871 if (!LABEL_IS_SGI) {
1872 i = get_existing_partition(0, g_partitions);
1874 i = get_partition(0, g_partitions);
1878 p = ptes[i].part_table;
1879 origsys = sys = get_sysid(i);
1881 /* if changing types T to 0 is allowed, then
1882 the reverse change must be allowed, too */
1883 if (!sys && !LABEL_IS_SGI && !LABEL_IS_SUN && !get_nr_sects(p)) {
1884 printf("Partition %u does not exist yet!\n", i + 1);
1888 sys = read_hex(get_sys_types());
1890 if (!sys && !LABEL_IS_SGI && !LABEL_IS_SUN) {
1891 puts("Type 0 means free space to many systems\n"
1892 "(but not to Linux). Having partitions of\n"
1893 "type 0 is probably unwise.");
1897 if (!LABEL_IS_SUN && !LABEL_IS_SGI) {
1898 if (IS_EXTENDED(sys) != IS_EXTENDED(p->sys_ind)) {
1899 puts("You cannot change a partition into"
1900 " an extended one or vice versa");
1906 #if ENABLE_FEATURE_SUN_LABEL
1907 if (LABEL_IS_SUN && i == 2 && sys != SUN_WHOLE_DISK)
1908 puts("Consider leaving partition 3 "
1909 "as Whole disk (5),\n"
1910 "as SunOS/Solaris expects it and "
1911 "even Linux likes it\n");
1913 #if ENABLE_FEATURE_SGI_LABEL
1916 (i == 10 && sys != SGI_ENTIRE_DISK) ||
1917 (i == 8 && sys != 0)
1920 puts("Consider leaving partition 9 "
1921 "as volume header (0),\nand "
1922 "partition 11 as entire volume (6)"
1923 "as IRIX expects it\n");
1929 sun_change_sysid(i, sys);
1930 } else if (LABEL_IS_SGI) {
1931 sgi_change_sysid(i, sys);
1935 printf("Changed system type of partition %u "
1936 "to %x (%s)\n", i + 1, sys,
1937 partition_type(sys));
1938 ptes[i].changed = 1;
1939 //if (is_dos_partition(origsys) || is_dos_partition(sys))
1945 #endif /* FEATURE_FDISK_WRITABLE */
1948 /* check_consistency() and linear2chs() added Sat Mar 6 12:28:16 1993,
1949 * faith@cs.unc.edu, based on code fragments from pfdisk by Gordon W. Ross,
1950 * Jan. 1990 (version 1.2.1 by Gordon W. Ross Aug. 1990; Modified by S.
1951 * Lubkin Oct. 1991). */
1954 linear2chs(unsigned ls, unsigned *c, unsigned *h, unsigned *s)
1956 int spc = g_heads * g_sectors;
1960 *h = ls / g_sectors;
1961 *s = ls % g_sectors + 1; /* sectors count from 1 */
1965 check_consistency(const struct partition *p, int partition)
1967 unsigned pbc, pbh, pbs; /* physical beginning c, h, s */
1968 unsigned pec, peh, pes; /* physical ending c, h, s */
1969 unsigned lbc, lbh, lbs; /* logical beginning c, h, s */
1970 unsigned lec, leh, les; /* logical ending c, h, s */
1972 if (!g_heads || !g_sectors || (partition >= 4))
1973 return; /* do not check extended partitions */
1975 /* physical beginning c, h, s */
1976 pbc = cylinder(p->sector, p->cyl);
1978 pbs = sector(p->sector);
1980 /* physical ending c, h, s */
1981 pec = cylinder(p->end_sector, p->end_cyl);
1983 pes = sector(p->end_sector);
1985 /* compute logical beginning (c, h, s) */
1986 linear2chs(get_start_sect(p), &lbc, &lbh, &lbs);
1988 /* compute logical ending (c, h, s) */
1989 linear2chs(get_start_sect(p) + get_nr_sects(p) - 1, &lec, &leh, &les);
1991 /* Same physical / logical beginning? */
1992 if (g_cylinders <= 1024 && (pbc != lbc || pbh != lbh || pbs != lbs)) {
1993 printf("Partition %u has different physical/logical "
1994 "start (non-Linux?):\n", partition + 1);
1995 printf(" phys=(%u,%u,%u) ", pbc, pbh, pbs);
1996 printf("logical=(%u,%u,%u)\n", lbc, lbh, lbs);
1999 /* Same physical / logical ending? */
2000 if (g_cylinders <= 1024 && (pec != lec || peh != leh || pes != les)) {
2001 printf("Partition %u has different physical/logical "
2002 "end:\n", partition + 1);
2003 printf(" phys=(%u,%u,%u) ", pec, peh, pes);
2004 printf("logical=(%u,%u,%u)\n", lec, leh, les);
2007 /* Ending on cylinder boundary? */
2008 if (peh != (g_heads - 1) || pes != g_sectors) {
2009 printf("Partition %u does not end on cylinder boundary\n",
2015 list_disk_geometry(void)
2017 ullong bytes = ((ullong)total_number_of_sectors << 9);
2018 ullong xbytes = bytes / (1024*1024);
2021 if (xbytes >= 10000) {
2022 xbytes += 512; /* fdisk util-linux 2.28 does this */
2026 printf("Disk %s: %llu %cB, %llu bytes, %"SECT_FMT"u sectors\n"
2027 "%u cylinders, %u heads, %u sectors/track\n"
2028 "Units: %s of %u * %u = %u bytes\n\n",
2029 disk_device, xbytes, x,
2030 bytes, total_number_of_sectors,
2031 g_cylinders, g_heads, g_sectors,
2033 units_per_sector, sector_size, units_per_sector * sector_size
2038 * Check whether partition entries are ordered by their starting positions.
2039 * Return 0 if OK. Return i if partition i should have been earlier.
2040 * Two separate checks: primary and logical partitions.
2043 wrong_p_order(int *prev)
2045 const struct pte *pe;
2046 const struct partition *p;
2047 sector_t last_p_start_pos = 0, p_start_pos;
2048 unsigned i, last_i = 0;
2050 for (i = 0; i < g_partitions; i++) {
2053 last_p_start_pos = 0;
2058 p_start_pos = get_partition_start_from_dev_start(pe);
2060 if (last_p_start_pos > p_start_pos) {
2066 last_p_start_pos = p_start_pos;
2073 #if ENABLE_FEATURE_FDISK_ADVANCED
2075 * Fix the chain of logicals.
2076 * extended_offset is unchanged, the set of sectors used is unchanged
2077 * The chain is sorted so that sectors increase, and so that
2078 * starting sectors increase.
2080 * After this it may still be that cfdisk doesnt like the table.
2081 * (This is because cfdisk considers expanded parts, from link to
2082 * end of partition, and these may still overlap.)
2084 * sfdisk /dev/hda > ohda; sfdisk /dev/hda < ohda
2088 fix_chain_of_logicals(void)
2090 int j, oj, ojj, sj, sjj;
2091 struct partition *pj,*pjj,tmp;
2093 /* Stage 1: sort sectors but leave sector of part 4 */
2094 /* (Its sector is the global extended_offset.) */
2096 for (j = 5; j < g_partitions - 1; j++) {
2097 oj = ptes[j].offset_from_dev_start;
2098 ojj = ptes[j+1].offset_from_dev_start;
2100 ptes[j].offset_from_dev_start = ojj;
2101 ptes[j+1].offset_from_dev_start = oj;
2102 pj = ptes[j].part_table;
2103 set_start_sect(pj, get_start_sect(pj)+oj-ojj);
2104 pjj = ptes[j+1].part_table;
2105 set_start_sect(pjj, get_start_sect(pjj)+ojj-oj);
2106 set_start_sect(ptes[j-1].ext_pointer,
2107 ojj-extended_offset);
2108 set_start_sect(ptes[j].ext_pointer,
2109 oj-extended_offset);
2114 /* Stage 2: sort starting sectors */
2116 for (j = 4; j < g_partitions - 1; j++) {
2117 pj = ptes[j].part_table;
2118 pjj = ptes[j+1].part_table;
2119 sj = get_start_sect(pj);
2120 sjj = get_start_sect(pjj);
2121 oj = ptes[j].offset_from_dev_start;
2122 ojj = ptes[j+1].offset_from_dev_start;
2123 if (oj+sj > ojj+sjj) {
2127 set_start_sect(pj, ojj+sjj-oj);
2128 set_start_sect(pjj, oj+sj-ojj);
2133 /* Probably something was changed */
2134 for (j = 4; j < g_partitions; j++)
2135 ptes[j].changed = 1;
2140 fix_partition_table_order(void)
2142 struct pte *pei, *pek;
2145 if (!wrong_p_order(NULL)) {
2146 puts("Ordering is already correct\n");
2150 while ((i = wrong_p_order(&k)) != 0 && i < 4) {
2151 /* partition i should have come earlier, move it */
2152 /* We have to move data in the MBR */
2153 struct partition *pi, *pk, *pe, pbuf;
2157 pe = pei->ext_pointer;
2158 pei->ext_pointer = pek->ext_pointer;
2159 pek->ext_pointer = pe;
2161 pi = pei->part_table;
2162 pk = pek->part_table;
2164 memmove(&pbuf, pi, sizeof(struct partition));
2165 memmove(pi, pk, sizeof(struct partition));
2166 memmove(pk, &pbuf, sizeof(struct partition));
2168 pei->changed = pek->changed = 1;
2172 fix_chain_of_logicals();
2179 chs_string11(unsigned cyl, unsigned head, unsigned sect)
2181 char *buf = auto_string(xzalloc(sizeof(int)*3 * 3));
2182 sprintf(buf, "%u,%u,%u", cylinder(sect,cyl), head, sector(sect));
2187 list_table(int xtra)
2192 sun_list_table(xtra);
2196 sgi_list_table(xtra);
2200 gpt_list_table(xtra);
2204 list_disk_geometry();
2207 xbsd_print_disklabel(xtra);
2211 /* Heuristic: we list partition 3 of /dev/foo as /dev/foo3,
2212 * but if the device name ends in a digit, say /dev/foo1,
2213 * then the partition is called /dev/foo1p3.
2215 w = strlen(disk_device);
2216 if (w && isdigit(disk_device[w-1]))
2221 printf("%-*s Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type\n",
2224 for (i = 0; i < g_partitions; i++) {
2225 const struct partition *p;
2226 const struct pte *pe = &ptes[i];
2229 sector_t start_sect;
2234 if (!p || is_cleared_partition(p))
2237 sprintf(boot4, "%02x", p->boot_ind);
2238 if ((p->boot_ind & 0x7f) == 0) {
2239 /* 0x80 shown as '*', 0x00 is ' ' */
2240 boot4[0] = p->boot_ind ? '*' : ' ';
2244 start_sect = get_partition_start_from_dev_start(pe);
2245 end_sect = start_sect;
2246 nr_sects = get_nr_sects(p);
2248 end_sect += nr_sects - 1;
2250 smart_ulltoa5((ullong)nr_sects * sector_size,
2251 numstr6, " KMGTPEZY")[0] = '\0';
2253 #define SFMT SECT_FMT
2254 // Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type
2255 printf("%s%s %-11s"/**/" %-11s"/**/" %10"SFMT"u %10"SFMT"u %10"SFMT"u %s %2x %s\n",
2256 partname(disk_device, i+1, w+2),
2258 chs_string11(p->cyl, p->head, p->sector),
2259 chs_string11(p->end_cyl, p->end_head, p->end_sector),
2265 partition_type(p->sys_ind)
2268 check_consistency(p, i);
2271 /* Is partition table in disk order? It need not be, but... */
2272 /* partition table entries are not checked for correct order
2273 * if this is a sgi, sun or aix labeled disk... */
2274 if (LABEL_IS_DOS && wrong_p_order(NULL)) {
2276 puts("\nPartition table entries are not in disk order");
2280 #if ENABLE_FEATURE_FDISK_ADVANCED
2282 x_list_table(int extend)
2284 const struct pte *pe;
2285 const struct partition *p;
2288 printf("\nDisk %s: %u heads, %u sectors, %u cylinders\n\n",
2289 disk_device, g_heads, g_sectors, g_cylinders);
2290 puts("Nr AF Hd Sec Cyl Hd Sec Cyl Start Size ID");
2291 for (i = 0; i < g_partitions; i++) {
2293 p = (extend ? pe->ext_pointer : pe->part_table);
2295 printf("%2u %02x%4u%4u%5u%4u%4u%5u%11"SECT_FMT"u%11"SECT_FMT"u %02x\n",
2299 cylinder(p->sector, p->cyl),
2301 sector(p->end_sector),
2302 cylinder(p->end_sector, p->end_cyl),
2308 check_consistency(p, i);
2314 #if ENABLE_FEATURE_FDISK_WRITABLE
2316 fill_bounds(sector_t *first, sector_t *last)
2319 const struct pte *pe = &ptes[0];
2320 const struct partition *p;
2322 for (i = 0; i < g_partitions; pe++,i++) {
2324 if (!p->sys_ind || IS_EXTENDED(p->sys_ind)) {
2325 first[i] = 0xffffffff;
2328 first[i] = get_partition_start_from_dev_start(pe);
2329 last[i] = first[i] + get_nr_sects(p) - 1;
2335 check(int n, unsigned h, unsigned s, unsigned c, sector_t start)
2337 sector_t total, real_s, real_c;
2339 real_s = sector(s) - 1;
2340 real_c = cylinder(s, c);
2341 total = (real_c * g_sectors + real_s) * g_heads + h;
2343 printf("Partition %u contains sector 0\n", n);
2345 printf("Partition %u: head %u greater than maximum %u\n",
2347 if (real_s >= g_sectors)
2348 printf("Partition %u: sector %u greater than "
2349 "maximum %u\n", n, s, g_sectors);
2350 if (real_c >= g_cylinders)
2351 printf("Partition %u: cylinder %"SECT_FMT"u greater than "
2352 "maximum %u\n", n, real_c + 1, g_cylinders);
2353 if (g_cylinders <= 1024 && start != total)
2354 printf("Partition %u: previous sectors %"SECT_FMT"u disagrees with "
2355 "total %"SECT_FMT"u\n", n, start, total);
2364 sector_t first[g_partitions], last[g_partitions];
2365 struct partition *p;
2367 if (warn_geometry())
2379 fill_bounds(first, last);
2380 for (i = 0; i < g_partitions; i++) {
2381 struct pte *pe = &ptes[i];
2384 if (p->sys_ind && !IS_EXTENDED(p->sys_ind)) {
2385 check_consistency(p, i);
2386 if (get_partition_start_from_dev_start(pe) < first[i])
2387 printf("Warning: bad start-of-data in "
2388 "partition %u\n", i + 1);
2389 check(i + 1, p->end_head, p->end_sector, p->end_cyl,
2391 total += last[i] + 1 - first[i];
2392 for (j = 0; j < i; j++) {
2393 if ((first[i] >= first[j] && first[i] <= last[j])
2394 || ((last[i] <= last[j] && last[i] >= first[j]))) {
2395 printf("Warning: partition %u overlaps "
2396 "partition %u\n", j + 1, i + 1);
2397 total += first[i] >= first[j] ?
2398 first[i] : first[j];
2399 total -= last[i] <= last[j] ?
2406 if (extended_offset) {
2407 struct pte *pex = &ptes[ext_index];
2408 sector_t e_last = get_start_sect(pex->part_table) +
2409 get_nr_sects(pex->part_table) - 1;
2411 for (i = 4; i < g_partitions; i++) {
2413 p = ptes[i].part_table;
2415 if (i != 4 || i + 1 < g_partitions)
2416 printf("Warning: partition %u "
2417 "is empty\n", i + 1);
2418 } else if (first[i] < extended_offset || last[i] > e_last) {
2419 printf("Logical partition %u not entirely in "
2420 "partition %u\n", i + 1, ext_index + 1);
2425 chs_size = (sector_t)g_heads * g_sectors * g_cylinders;
2426 if (total > chs_size)
2427 printf("Total allocated sectors %u"
2428 " greater than CHS size %"SECT_FMT"u\n",
2432 total = chs_size - total;
2434 printf("%"SECT_FMT"u unallocated sectors\n", total);
2439 add_partition(int n, int sys)
2441 char mesg[256]; /* 48 does not suffice in Japanese */
2442 int i, num_read = 0;
2443 struct partition *p = ptes[n].part_table;
2444 struct partition *q = ptes[ext_index].part_table;
2445 sector_t limit, temp;
2446 sector_t start, stop = 0;
2447 sector_t first[g_partitions], last[g_partitions];
2449 if (p && p->sys_ind) {
2450 printf(msg_part_already_defined, n + 1);
2453 fill_bounds(first, last);
2455 start = sector_offset;
2456 if (display_in_cyl_units || !total_number_of_sectors)
2457 limit = (sector_t) g_heads * g_sectors * g_cylinders - 1;
2459 limit = total_number_of_sectors - 1;
2460 if (extended_offset) {
2461 first[ext_index] = extended_offset;
2462 last[ext_index] = get_start_sect(q) +
2463 get_nr_sects(q) - 1;
2466 start = extended_offset + sector_offset;
2467 limit = get_start_sect(q) + get_nr_sects(q) - 1;
2469 if (display_in_cyl_units)
2470 for (i = 0; i < g_partitions; i++)
2471 first[i] = (cround(first[i]) - 1) * units_per_sector;
2473 snprintf(mesg, sizeof(mesg), "First %s", str_units(SINGULAR));
2476 for (i = 0; i < g_partitions; i++) {
2479 if (start == ptes[i].offset_from_dev_start)
2480 start += sector_offset;
2481 lastplusoff = last[i] + ((n < 4) ? 0 : sector_offset);
2482 if (start >= first[i] && start <= lastplusoff)
2483 start = lastplusoff + 1;
2487 if (start >= temp+units_per_sector && num_read) {
2488 printf("Sector %"SECT_FMT"u is already allocated\n", temp);
2492 if (!num_read && start == temp) {
2493 sector_t saved_start;
2495 saved_start = start;
2496 start = read_int(cround(saved_start), cround(saved_start), cround(limit), 0, mesg);
2497 if (display_in_cyl_units) {
2498 start = (start - 1) * units_per_sector;
2499 if (start < saved_start)
2500 start = saved_start;
2504 } while (start != temp || !num_read);
2505 if (n > 4) { /* NOT for fifth partition */
2506 struct pte *pe = &ptes[n];
2508 pe->offset_from_dev_start = start - sector_offset;
2509 if (pe->offset_from_dev_start == extended_offset) { /* must be corrected */
2510 pe->offset_from_dev_start++;
2511 if (sector_offset == 1)
2516 for (i = 0; i < g_partitions; i++) {
2517 struct pte *pe = &ptes[i];
2519 if (start < pe->offset_from_dev_start && limit >= pe->offset_from_dev_start)
2520 limit = pe->offset_from_dev_start - 1;
2521 if (start < first[i] && limit >= first[i])
2522 limit = first[i] - 1;
2524 if (start > limit) {
2525 puts("No free sectors available");
2530 if (cround(start) == cround(limit)) {
2533 snprintf(mesg, sizeof(mesg),
2534 "Last %s or +size or +sizeM or +sizeK",
2535 str_units(SINGULAR));
2536 stop = read_int(cround(start), cround(limit), cround(limit), cround(start), mesg);
2537 if (display_in_cyl_units) {
2538 stop = stop * units_per_sector - 1;
2544 set_partition(n, 0, start, stop, sys);
2546 set_partition(n - 1, 1, ptes[n].offset_from_dev_start, stop, EXTENDED);
2548 if (IS_EXTENDED(sys)) {
2549 struct pte *pe4 = &ptes[4];
2550 struct pte *pen = &ptes[n];
2553 pen->ext_pointer = p;
2554 pe4->offset_from_dev_start = extended_offset = start;
2555 pe4->sectorbuffer = xzalloc(sector_size);
2556 pe4->part_table = pt_offset(pe4->sectorbuffer, 0);
2557 pe4->ext_pointer = pe4->part_table + 1;
2566 if (g_partitions > 5 || ptes[4].part_table->sys_ind) {
2567 struct pte *pe = &ptes[g_partitions];
2569 pe->sectorbuffer = xzalloc(sector_size);
2570 pe->part_table = pt_offset(pe->sectorbuffer, 0);
2571 pe->ext_pointer = pe->part_table + 1;
2572 pe->offset_from_dev_start = 0;
2576 add_partition(g_partitions - 1, LINUX_NATIVE);
2582 int i, free_primary = 0;
2584 if (warn_geometry())
2588 add_sun_partition(get_partition(0, g_partitions), LINUX_NATIVE);
2592 sgi_add_partition(get_partition(0, g_partitions), LINUX_NATIVE);
2596 puts("Sorry - this fdisk cannot handle AIX disk labels.\n"
2597 "If you want to add DOS-type partitions, create a new empty DOS partition\n"
2598 "table first (use 'o'). This will destroy the present disk contents.");
2602 for (i = 0; i < 4; i++)
2603 free_primary += !ptes[i].part_table->sys_ind;
2605 if (!free_primary && g_partitions >= MAXIMUM_PARTS) {
2606 puts("The maximum number of partitions has been created");
2610 if (!free_primary) {
2611 if (extended_offset)
2614 puts("You must delete some partition and add "
2615 "an extended partition first");
2618 snprintf(line, sizeof(line),
2621 " p primary partition (1-4)\n",
2623 "l logical (5 or over)" : "e extended"));
2625 c = read_nonempty(line);
2626 if ((c | 0x20) == 'p') {
2627 i = get_nonexisting_partition(0, 4);
2629 add_partition(i, LINUX_NATIVE);
2632 if (c == 'l' && extended_offset) {
2636 if (c == 'e' && !extended_offset) {
2637 i = get_nonexisting_partition(0, 4);
2639 add_partition(i, EXTENDED);
2642 printf("Invalid partition number "
2643 "for type '%c'\n", c);
2649 reread_partition_table(int leave)
2653 puts("Calling ioctl() to re-read partition table");
2655 /* Users with slow external USB disks on a 320MHz ARM system (year 2011)
2656 * report that sleep is needed, otherwise BLKRRPART may fail with -EIO:
2659 i = ioctl_or_perror(dev_fd, BLKRRPART, NULL,
2660 "WARNING: rereading partition table "
2661 "failed, kernel still uses old table");
2665 "\nWARNING: If you have created or modified any DOS 6.x\n"
2666 "partitions, please see the fdisk manual page for additional\n"
2671 if (ENABLE_FEATURE_CLEAN_UP)
2683 for (i = 0; i < 3; i++)
2684 if (ptes[i].changed)
2685 ptes[3].changed = 1;
2686 for (i = 3; i < g_partitions; i++) {
2687 struct pte *pe = &ptes[i];
2689 write_part_table_flag(pe->sectorbuffer);
2690 write_sector(pe->offset_from_dev_start, pe->sectorbuffer);
2694 else if (LABEL_IS_SGI) {
2695 /* no test on change? the "altered" msg below might be mistaken */
2698 else if (LABEL_IS_SUN) {
2699 for (i = 0; i < 8; i++) {
2700 if (ptes[i].changed) {
2707 puts("The partition table has been altered.");
2708 reread_partition_table(1);
2710 #endif /* FEATURE_FDISK_WRITABLE */
2712 #if ENABLE_FEATURE_FDISK_ADVANCED
2713 #define MAX_PER_LINE 16
2715 print_buffer(char *pbuffer)
2719 for (i = 0, l = 0; i < sector_size; i++, l++) {
2721 printf("0x%03X:", i);
2722 printf(" %02X", (unsigned char) pbuffer[i]);
2723 if (l == MAX_PER_LINE - 1) {
2738 printf("Device: %s\n", disk_device);
2739 if (LABEL_IS_SGI || LABEL_IS_SUN)
2740 print_buffer(MBRbuffer);
2742 for (i = 3; i < g_partitions; i++)
2743 print_buffer(ptes[i].sectorbuffer);
2748 move_begin(unsigned i)
2750 struct pte *pe = &ptes[i];
2751 struct partition *p = pe->part_table;
2752 sector_t new, first, nr_sects;
2754 if (warn_geometry())
2756 nr_sects = get_nr_sects(p);
2757 if (!p->sys_ind || !nr_sects || IS_EXTENDED(p->sys_ind)) {
2758 printf("Partition %u has no data area\n", i + 1);
2761 first = get_partition_start_from_dev_start(pe); /* == pe->offset_from_dev_start + get_start_sect(p) */
2762 new = read_int(0 /*was:first*/, first, first + nr_sects - 1, first, "New beginning of data");
2764 sector_t new_relative = new - pe->offset_from_dev_start;
2765 nr_sects += (get_start_sect(p) - new_relative);
2766 set_start_sect(p, new_relative);
2767 set_nr_sects(p, nr_sects);
2768 read_nonempty("Recalculate C/H/S values? (Y/N): ");
2769 if ((line_ptr[0] | 0x20) == 'y')
2770 set_hsc_start_end(p, new, new + nr_sects - 1);
2782 c = 0x20 | read_nonempty("Expert command (m for help): ");
2790 move_begin(get_partition(0, g_partitions));
2793 user_cylinders = g_cylinders =
2794 read_int(1, g_cylinders, 1048576, 0,
2795 "Number of cylinders");
2797 sun_set_ncyl(g_cylinders);
2807 else if (LABEL_IS_SUN)
2809 else if (LABEL_IS_DOS)
2814 fix_partition_table_order();
2817 #if ENABLE_FEATURE_SGI_LABEL
2822 user_heads = g_heads = read_int(1, g_heads, 256, 0, "Number of heads");
2840 if (ENABLE_FEATURE_CLEAN_UP)
2847 user_sectors = g_sectors = read_int(1, g_sectors, 63, 0, "Number of sectors");
2848 if (dos_compatible_flag) {
2849 sector_offset = g_sectors;
2850 puts("Warning: setting sector offset for DOS "
2859 write_table(); /* does not return */
2863 sun_set_pcylcount();
2870 #endif /* ADVANCED mode */
2873 is_ide_cdrom_or_tape(const char *device)
2877 struct stat statbuf;
2880 /* No device was given explicitly, and we are trying some
2881 likely things. But opening /dev/hdc may produce errors like
2882 "hdc: tray open or drive not ready"
2883 if it happens to be a CD-ROM drive. It even happens that
2884 the process hangs on the attempt to read a music CD.
2885 So try to be careful. This only works since 2.1.73. */
2887 if (!is_prefixed_with(device, "/dev/hd"))
2890 snprintf(buf, sizeof(buf), "/proc/ide/%s/media", device+5);
2891 procf = fopen_for_read(buf);
2892 if (procf != NULL && fgets(buf, sizeof(buf), procf))
2893 is_ide = (is_prefixed_with(buf, "cdrom") ||
2894 is_prefixed_with(buf, "tape"));
2896 /* Now when this proc file does not exist, skip the
2897 device when it is read-only. */
2898 if (stat(device, &statbuf) == 0)
2899 is_ide = ((statbuf.st_mode & 0222) == 0);
2908 open_list_and_close(const char *device, int user_specified)
2912 disk_device = device;
2913 if (setjmp(listingbuf))
2915 if (!user_specified)
2916 if (is_ide_cdrom_or_tape(device))
2919 /* Open disk_device, save file descriptor to dev_fd */
2921 gb = get_boot(TRY_ONLY);
2922 if (gb > 0) { /* I/O error */
2923 /* Ignore other errors, since we try IDE
2924 and SCSI hard disks which may not be
2925 installed on the system. */
2926 if (user_specified || errno == EACCES)
2927 bb_perror_msg("can't open '%s'", device);
2931 if (gb < 0) { /* no DOS signature */
2932 list_disk_geometry();
2935 #if ENABLE_FEATURE_OSF_LABEL
2936 if (bsd_trydev(device) < 0)
2938 printf("Disk %s doesn't contain a valid "
2939 "partition table\n", device);
2942 #if ENABLE_FEATURE_FDISK_WRITABLE
2943 if (!LABEL_IS_SUN && g_partitions > 4) {
2944 delete_partition(ext_index);
2952 /* Is it a whole disk? The digit check is still useful
2953 for Xen devices for example. */
2954 static int is_whole_disk(const char *disk)
2957 int fd = open(disk, O_RDONLY);
2960 struct hd_geometry geometry;
2961 int err = ioctl(fd, HDIO_GETGEO, &geometry);
2964 return (geometry.start == 0);
2967 /* Treat "nameN" as a partition name, not whole disk */
2968 /* note: mmcblk0 should work from the geometry check above */
2970 if (len != 0 && isdigit(disk[len - 1]))
2976 /* for fdisk -l: try all things in /proc/partitions
2977 that look like a partition name (do not end in a digit) */
2979 list_devs_in_proc_partititons(void)
2982 char line[100], ptname[100], devname[120];
2985 procpt = fopen_or_warn("/proc/partitions", "r");
2987 while (fgets(line, sizeof(line), procpt)) {
2988 if (sscanf(line, " %u %u %u %[^\n ]",
2989 &ma, &mi, &sz, ptname) != 4)
2992 sprintf(devname, "/dev/%s", ptname);
2993 if (is_whole_disk(devname))
2994 open_list_and_close(devname, 0);
2996 #if ENABLE_FEATURE_CLEAN_UP
3001 #if ENABLE_FEATURE_FDISK_WRITABLE
3003 unknown_command(int c)
3005 printf("%c: unknown command\n", c);
3009 int fdisk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
3010 int fdisk_main(int argc UNUSED_PARAM, char **argv)
3015 * fdisk -l [-b sectorsize] [-u] device ...
3016 * fdisk -s [partition] ...
3017 * fdisk [-b sectorsize] [-u] device
3019 * Options -C, -H, -S set the geometry.
3023 close_dev_fd(); /* needed: fd 3 must not stay closed */
3025 opt = getopt32(argv, "b:+C:+H:+lS:+u" IF_FEATURE_FDISK_BLKSIZE("s"),
3026 §or_size, &user_cylinders, &user_heads, &user_sectors);
3029 /* Ugly: this sector size is really per device,
3030 * so cannot be combined with multiple disks,
3031 * and the same goes for the C/H/S options.
3033 if (sector_size < 512
3034 || sector_size > 0x10000
3035 || (sector_size & (sector_size-1)) /* not power of 2 */
3040 user_set_sector_size = 1;
3042 if (user_heads <= 0 || user_heads >= 256)
3044 if (user_sectors <= 0 || user_sectors >= 64)
3047 display_in_cyl_units = 0; // -u
3049 #if ENABLE_FEATURE_FDISK_WRITABLE
3056 open_list_and_close(*argv, 1);
3059 /* we don't have device names, */
3060 /* use /proc/partitions instead */
3061 list_devs_in_proc_partititons();
3064 #if ENABLE_FEATURE_FDISK_WRITABLE
3068 #if ENABLE_FEATURE_FDISK_BLKSIZE
3075 for (j = 0; argv[j]; j++) {
3076 unsigned long long size;
3077 fd = xopen(argv[j], O_RDONLY);
3078 size = bb_BLKGETSIZE_sectors(fd) / 2;
3081 printf("%llu\n", size);
3083 printf("%s: %llu\n", argv[j], size);
3089 #if ENABLE_FEATURE_FDISK_WRITABLE
3090 if (!argv[0] || argv[1])
3093 disk_device = argv[0];
3094 get_boot(OPEN_MAIN);
3097 /* OSF label, and no DOS label */
3098 printf("Detected an OSF/1 disklabel on %s, entering "
3099 "disklabel mode\n", disk_device);
3101 /*Why do we do this? It seems to be counter-intuitive*/
3102 current_label_type = LABEL_DOS;
3103 /* If we return we may want to make an empty DOS label? */
3109 c = 0x20 | read_nonempty("Command (m for help): ");
3113 toggle_active(get_partition(1, g_partitions));
3114 else if (LABEL_IS_SUN)
3115 toggle_sunflags(get_partition(1, g_partitions),
3117 else if (LABEL_IS_SGI)
3118 sgi_set_bootpartition(
3119 get_partition(1, g_partitions));
3125 printf("\nThe current boot file is: %s\n",
3126 sgi_get_bootfile());
3127 if (read_maybe_empty("Please enter the name of the "
3128 "new boot file: ") == '\n')
3129 puts("Boot file unchanged");
3131 sgi_set_bootfile(line_ptr);
3133 #if ENABLE_FEATURE_OSF_LABEL
3140 toggle_dos_compatibility_flag();
3141 else if (LABEL_IS_SUN)
3142 toggle_sunflags(get_partition(1, g_partitions),
3144 else if (LABEL_IS_SGI)
3145 sgi_set_swappartition(
3146 get_partition(1, g_partitions));
3153 /* If sgi_label then don't use get_existing_partition,
3154 let the user select a partition, since
3155 get_existing_partition() only works for Linux-like
3157 if (!LABEL_IS_SGI) {
3158 j = get_existing_partition(1, g_partitions);
3160 j = get_partition(1, g_partitions);
3163 delete_partition(j);
3172 list_types(get_sys_types());
3187 if (ENABLE_FEATURE_CLEAN_UP)
3192 #if ENABLE_FEATURE_SUN_LABEL
3206 write_table(); /* does not return */
3208 #if ENABLE_FEATURE_FDISK_ADVANCED
3211 puts("\n\tSorry, no experts menu for SGI "
3212 "partition tables available\n");
3223 #endif /* FEATURE_FDISK_WRITABLE */