1 /* vi: set sw=4 ts=4: */
3 * fdisk.c -- Partition table manipulator for Linux.
5 * Copyright (C) 1992 A. V. Le Blanc (LeBlanc@mcc.ac.uk)
6 * Copyright (C) 2001,2002 Vladimir Oleynik <dzo@simtreas.ru> (initial bb port)
8 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
11 //config: bool "fdisk (41 kb)"
13 //config: select PLATFORM_LINUX
15 //config: The fdisk utility is used to divide hard disks into one or more
16 //config: logical disks, which are generally called partitions. This utility
17 //config: can be used to list and edit the set of partitions or BSD style
18 //config: 'disk slices' that are defined on a hard drive.
20 //config:config FDISK_SUPPORT_LARGE_DISKS
21 //config: bool "Support over 4GB disks"
23 //config: depends on FDISK
24 //config: depends on !LFS # with LFS no special code is needed
26 //config:config FEATURE_FDISK_WRITABLE
27 //config: bool "Write support"
29 //config: depends on FDISK
31 //config: Enabling this option allows you to create or change a partition table
32 //config: and write those changes out to disk. If you leave this option
33 //config: disabled, you will only be able to view the partition table.
35 //config:config FEATURE_AIX_LABEL
36 //config: bool "Support AIX disklabels"
38 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
40 //config: Enabling this option allows you to create or change AIX disklabels.
41 //config: Most people can safely leave this option disabled.
43 //config:config FEATURE_SGI_LABEL
44 //config: bool "Support SGI disklabels"
46 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
48 //config: Enabling this option allows you to create or change SGI disklabels.
49 //config: Most people can safely leave this option disabled.
51 //config:config FEATURE_SUN_LABEL
52 //config: bool "Support SUN disklabels"
54 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
56 //config: Enabling this option allows you to create or change SUN disklabels.
57 //config: Most people can safely leave this option disabled.
59 //config:config FEATURE_OSF_LABEL
60 //config: bool "Support BSD disklabels"
62 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
64 //config: Enabling this option allows you to create or change BSD disklabels
65 //config: and define and edit BSD disk slices.
67 //config:config FEATURE_GPT_LABEL
68 //config: bool "Support GPT disklabels"
70 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
72 //config: Enabling this option allows you to view GUID Partition Table
75 //config:config FEATURE_FDISK_ADVANCED
76 //config: bool "Support expert mode"
78 //config: depends on FDISK && FEATURE_FDISK_WRITABLE
80 //config: Enabling this option allows you to do terribly unsafe things like
81 //config: define arbitrary drive geometry, move the beginning of data in a
82 //config: partition, and similarly evil things. Unless you have a very good
83 //config: reason you would be wise to leave this disabled.
85 //applet:IF_FDISK(APPLET(fdisk, BB_DIR_SBIN, BB_SUID_DROP))
87 //kbuild:lib-$(CONFIG_FDISK) += fdisk.o
89 /* Looks like someone forgot to add this to config system */
90 //usage:#ifndef ENABLE_FEATURE_FDISK_BLKSIZE
91 //usage:# define ENABLE_FEATURE_FDISK_BLKSIZE 0
92 //usage:# define IF_FEATURE_FDISK_BLKSIZE(a)
95 //usage:#define fdisk_trivial_usage
96 //usage: "[-ul" IF_FEATURE_FDISK_BLKSIZE("s") "] "
97 //usage: "[-C CYLINDERS] [-H HEADS] [-S SECTORS] [-b SSZ] DISK"
98 //usage:#define fdisk_full_usage "\n\n"
99 //usage: "Change partition table\n"
100 //usage: "\n -u Start and End are in sectors (instead of cylinders)"
101 //usage: "\n -l Show partition table for each DISK, then exit"
102 //usage: IF_FEATURE_FDISK_BLKSIZE(
103 //usage: "\n -s Show partition sizes in kb for each DISK, then exit"
105 //usage: "\n -b 2048 (for certain MO disks) use 2048-byte sectors"
106 //usage: "\n -C CYLINDERS Set number of cylinders/heads/sectors"
107 //usage: "\n -H HEADS Typically 255"
108 //usage: "\n -S SECTORS Typically 63"
110 #ifndef _LARGEFILE64_SOURCE
112 # define _LARGEFILE64_SOURCE
114 #include <assert.h> /* assert */
115 #include <sys/mount.h>
116 #if !defined(BLKSSZGET)
117 # define BLKSSZGET _IO(0x12, 104)
119 #if !defined(BLKGETSIZE64)
120 # define BLKGETSIZE64 _IOR(0x12,114,size_t)
126 # define inline_if_little_endian ALWAYS_INLINE
128 # define inline_if_little_endian /* nothing */
132 /* Looks like someone forgot to add this to config system */
133 #ifndef ENABLE_FEATURE_FDISK_BLKSIZE
134 # define ENABLE_FEATURE_FDISK_BLKSIZE 0
135 # define IF_FEATURE_FDISK_BLKSIZE(a)
138 #define DEFAULT_SECTOR_SIZE 512
139 #define DEFAULT_SECTOR_SIZE_STR "512"
140 #define MAX_SECTOR_SIZE 2048
141 #define SECTOR_SIZE 512 /* still used in osf/sgi/sun code */
142 #define MAXIMUM_PARTS 60
144 #define ACTIVE_FLAG 0x80
146 #define EXTENDED 0x05
147 #define WIN98_EXTENDED 0x0f
148 #define LINUX_PARTITION 0x81
149 #define LINUX_SWAP 0x82
150 #define LINUX_NATIVE 0x83
151 #define LINUX_EXTENDED 0x85
152 #define LINUX_LVM 0x8e
153 #define LINUX_RAID 0xfd
163 OPT_s = (1 << 6) * ENABLE_FEATURE_FDISK_BLKSIZE,
167 typedef unsigned long long ullong;
168 /* Used for sector numbers. Partition formats we know
169 * do not support more than 2^32 sectors
171 typedef uint32_t sector_t;
172 #if UINT_MAX == 0xffffffff
174 #elif ULONG_MAX == 0xffffffff
175 # define SECT_FMT "l"
177 # error Cant detect sizeof(uint32_t)
182 unsigned char sectors;
183 unsigned short cylinders;
187 #define HDIO_GETGEO 0x0301 /* get device geometry */
189 /* TODO: #if ENABLE_FEATURE_FDISK_WRITABLE */
190 /* (currently fdisk_sun/sgi.c do not have proper WRITABLE #ifs) */
191 static const char msg_building_new_label[] ALIGN1 =
192 "Building a new %s. Changes will remain in memory only,\n"
193 "until you decide to write them. After that the previous content\n"
194 "won't be recoverable.\n\n";
196 static const char msg_part_already_defined[] ALIGN1 =
197 "Partition %u is already defined, delete it before re-adding\n";
202 unsigned char boot_ind; /* 0x80 - active */
203 unsigned char head; /* starting head */
204 unsigned char sector; /* starting sector */
205 unsigned char cyl; /* starting cylinder */
206 unsigned char sys_ind; /* what partition type */
207 unsigned char end_head; /* end head */
208 unsigned char end_sector; /* end sector */
209 unsigned char end_cyl; /* end cylinder */
210 unsigned char start4[4]; /* starting sector counting from 0 */
211 unsigned char size4[4]; /* nr of sectors in partition */
215 * per partition table entry data
217 * The four primary partitions have the same sectorbuffer (MBRbuffer)
218 * and have NULL ext_pointer.
219 * Each logical partition table entry has two pointers, one for the
220 * partition and one link to the next one.
223 struct partition *part_table; /* points into sectorbuffer */
224 struct partition *ext_pointer; /* points into sectorbuffer */
225 sector_t offset_from_dev_start; /* disk sector number */
226 char *sectorbuffer; /* disk sector contents */
227 #if ENABLE_FEATURE_FDISK_WRITABLE
228 char changed; /* boolean */
232 #define unable_to_open "can't open '%s'"
233 #define unable_to_read "can't read from %s"
234 #define unable_to_seek "can't seek on %s"
237 LABEL_DOS, LABEL_SUN, LABEL_SGI, LABEL_AIX, LABEL_OSF, LABEL_GPT
240 #define LABEL_IS_DOS (LABEL_DOS == current_label_type)
242 #if ENABLE_FEATURE_SUN_LABEL
243 #define LABEL_IS_SUN (LABEL_SUN == current_label_type)
244 #define STATIC_SUN static
246 #define LABEL_IS_SUN 0
247 #define STATIC_SUN extern
250 #if ENABLE_FEATURE_SGI_LABEL
251 #define LABEL_IS_SGI (LABEL_SGI == current_label_type)
252 #define STATIC_SGI static
254 #define LABEL_IS_SGI 0
255 #define STATIC_SGI extern
258 #if ENABLE_FEATURE_AIX_LABEL
259 #define LABEL_IS_AIX (LABEL_AIX == current_label_type)
260 #define STATIC_AIX static
262 #define LABEL_IS_AIX 0
263 #define STATIC_AIX extern
266 #if ENABLE_FEATURE_OSF_LABEL
267 #define LABEL_IS_OSF (LABEL_OSF == current_label_type)
268 #define STATIC_OSF static
270 #define LABEL_IS_OSF 0
271 #define STATIC_OSF extern
274 #if ENABLE_FEATURE_GPT_LABEL
275 #define LABEL_IS_GPT (LABEL_GPT == current_label_type)
276 #define STATIC_GPT static
278 #define LABEL_IS_GPT 0
279 #define STATIC_GPT extern
282 enum action { OPEN_MAIN, TRY_ONLY, CREATE_EMPTY_DOS, CREATE_EMPTY_SUN };
284 static void update_units(void);
285 #if ENABLE_FEATURE_FDISK_WRITABLE
286 static void change_units(void);
287 static void reread_partition_table(int leave);
288 static void delete_partition(int i);
289 static unsigned get_partition(int warn, unsigned max);
290 static void list_types(const char *const *sys);
291 static sector_t read_int(sector_t low, sector_t dflt, sector_t high, sector_t base, const char *mesg);
293 static const char *partition_type(unsigned char type);
294 static void get_geometry(void);
295 static void read_pte(struct pte *pe, sector_t offset);
296 #if ENABLE_FEATURE_SUN_LABEL || ENABLE_FEATURE_FDISK_WRITABLE
297 static int get_boot(enum action what);
299 static int get_boot(void);
305 static sector_t get_start_sect(const struct partition *p);
306 static sector_t get_nr_sects(const struct partition *p);
308 /* DOS partition types */
310 static const char *const i386_sys_types[] = {
314 "\x05" "Extended", /* DOS 3.3+ extended partition */
315 "\x06" "FAT16", /* DOS 16-bit >=32M */
316 "\x07" "HPFS/NTFS", /* OS/2 IFS, eg, HPFS or NTFS or QNX */
317 "\x0a" "OS/2 Boot Manager",/* OS/2 Boot Manager */
318 "\x0b" "Win95 FAT32",
319 "\x0c" "Win95 FAT32 (LBA)",/* LBA really is 'Extended Int 13h' */
320 "\x0e" "Win95 FAT16 (LBA)",
321 "\x0f" "Win95 Ext'd (LBA)",
322 "\x11" "Hidden FAT12",
323 "\x12" "Compaq diagnostics",
324 "\x14" "Hidden FAT16 <32M",
325 "\x16" "Hidden FAT16",
326 "\x17" "Hidden HPFS/NTFS",
327 "\x1b" "Hidden Win95 FAT32",
328 "\x1c" "Hidden W95 FAT32 (LBA)",
329 "\x1e" "Hidden W95 FAT16 (LBA)",
330 "\x3c" "Part.Magic recovery",
331 "\x41" "PPC PReP Boot",
333 "\x63" "GNU HURD or SysV", /* GNU HURD or Mach or Sys V/386 (such as ISC UNIX) */
334 "\x80" "Old Minix", /* Minix 1.4a and earlier */
335 "\x81" "Minix / old Linux",/* Minix 1.4b and later */
336 "\x82" "Linux swap", /* also Solaris */
338 "\x84" "OS/2 hidden C: drive",
339 "\x85" "Linux extended",
340 "\x86" "NTFS volume set",
341 "\x87" "NTFS volume set",
343 "\x9f" "BSD/OS", /* BSDI */
344 "\xa0" "Thinkpad hibernation",
345 "\xa5" "FreeBSD", /* various BSD flavours */
349 "\xab" "Darwin boot",
352 "\xbe" "Solaris boot",
354 "\xee" "EFI GPT", /* Intel EFI GUID Partition Table */
355 "\xef" "EFI (FAT-12/16/32)", /* Intel EFI System Partition */
356 "\xf0" "Linux/PA-RISC boot", /* Linux/PA-RISC boot loader */
357 "\xf2" "DOS secondary", /* DOS 3.3+ secondary */
358 "\xfd" "Linux raid autodetect", /* New (2.2.x) raid partition with
359 autodetect using persistent
361 #if 0 /* ENABLE_WEIRD_PARTITION_TYPES */
364 "\x08" "AIX", /* AIX boot (AIX -- PS/2 port) or SplitDrive */
365 "\x09" "AIX bootable", /* AIX data or Coherent */
367 "\x18" "AST SmartSleep",
370 "\x40" "Venix 80286",
372 "\x4e" "QNX4.x 2nd part",
373 "\x4f" "QNX4.x 3rd part",
375 "\x51" "OnTrack DM6 Aux1", /* (or Novell) */
376 "\x52" "CP/M", /* CP/M or Microport SysV/AT */
377 "\x53" "OnTrack DM6 Aux3",
381 "\x5c" "Priam Edisk",
383 "\x64" "Novell Netware 286",
384 "\x65" "Novell Netware 386",
385 "\x70" "DiskSecure Multi-Boot",
388 "\x94" "Amoeba BBT", /* (bad block table) */
390 "\xbb" "Boot Wizard hidden",
391 "\xc1" "DRDOS/sec (FAT-12)",
392 "\xc4" "DRDOS/sec (FAT-16 < 32M)",
393 "\xc6" "DRDOS/sec (FAT-16)",
395 "\xda" "Non-FS data",
396 "\xdb" "CP/M / CTOS / ...",/* CP/M or Concurrent CP/M or
397 Concurrent DOS or CTOS */
398 "\xde" "Dell Utility", /* Dell PowerEdge Server utilities */
399 "\xdf" "BootIt", /* BootIt EMBRM */
400 "\xe1" "DOS access", /* DOS access or SpeedStor 12-bit FAT
401 extended partition */
402 "\xe3" "DOS R/O", /* DOS R/O or SpeedStor */
403 "\xe4" "SpeedStor", /* SpeedStor 16-bit FAT extended
404 partition < 1024 cyl. */
406 "\xf4" "SpeedStor", /* SpeedStor large partition */
407 "\xfe" "LANstep", /* SpeedStor >1024 cyl. or LANstep */
408 "\xff" "BBT", /* Xenix Bad Block Table */
414 dev_fd = 3 /* the disk */
421 const char *disk_device;
422 int g_partitions; // = 4; /* maximum partition + 1 */
423 unsigned units_per_sector; // = 1;
424 unsigned sector_size; // = DEFAULT_SECTOR_SIZE;
425 unsigned user_set_sector_size;
426 unsigned sector_offset; // = 1;
427 unsigned g_heads, g_sectors, g_cylinders;
428 smallint /* enum label_type */ current_label_type;
429 smallint display_in_cyl_units;
430 #if ENABLE_FEATURE_OSF_LABEL
431 smallint possibly_osf_label;
434 smallint listing; /* no aborts for fdisk -l */
435 smallint dos_compatible_flag; // = 1;
436 #if ENABLE_FEATURE_FDISK_WRITABLE
438 smallint nowarn; /* no warnings for fdisk -l/-s */
440 int ext_index; /* the prime extended partition */
441 unsigned user_cylinders, user_heads, user_sectors;
442 unsigned pt_heads, pt_sectors;
443 unsigned kern_heads, kern_sectors;
444 sector_t extended_offset; /* offset of link pointers */
445 sector_t total_number_of_sectors;
448 char line_buffer[80];
449 /* Raw disk label. For DOS-type partition tables the MBR,
450 * with descriptions of the primary partitions. */
451 char MBRbuffer[MAX_SECTOR_SIZE];
452 /* Partition tables */
453 struct pte ptes[MAXIMUM_PARTS];
455 #define G (*ptr_to_globals)
456 #define line_ptr (G.line_ptr )
457 #define disk_device (G.disk_device )
458 #define g_partitions (G.g_partitions )
459 #define units_per_sector (G.units_per_sector )
460 #define sector_size (G.sector_size )
461 #define user_set_sector_size (G.user_set_sector_size)
462 #define sector_offset (G.sector_offset )
463 #define g_heads (G.g_heads )
464 #define g_sectors (G.g_sectors )
465 #define g_cylinders (G.g_cylinders )
466 #define current_label_type (G.current_label_type )
467 #define display_in_cyl_units (G.display_in_cyl_units)
468 #define possibly_osf_label (G.possibly_osf_label )
469 #define listing (G.listing )
470 #define dos_compatible_flag (G.dos_compatible_flag )
471 #define nowarn (G.nowarn )
472 #define ext_index (G.ext_index )
473 #define user_cylinders (G.user_cylinders )
474 #define user_heads (G.user_heads )
475 #define user_sectors (G.user_sectors )
476 #define pt_heads (G.pt_heads )
477 #define pt_sectors (G.pt_sectors )
478 #define kern_heads (G.kern_heads )
479 #define kern_sectors (G.kern_sectors )
480 #define extended_offset (G.extended_offset )
481 #define total_number_of_sectors (G.total_number_of_sectors)
482 #define listingbuf (G.listingbuf )
483 #define line_buffer (G.line_buffer )
484 #define MBRbuffer (G.MBRbuffer )
485 #define ptes (G.ptes )
486 #define INIT_G() do { \
487 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
488 sector_size = DEFAULT_SECTOR_SIZE; \
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
642 set_all_unchanged(void)
646 for (i = 0; i < MAXIMUM_PARTS; i++)
650 static ALWAYS_INLINE void
656 static ALWAYS_INLINE void
657 write_part_table_flag(char *b)
663 /* Read line; return 0 or first printable non-space char */
665 read_line(const char *prompt)
669 sz = read_line_input(NULL, prompt, line_buffer, sizeof(line_buffer));
671 exit(EXIT_SUCCESS); /* Ctrl-D or Ctrl-C */
673 if (line_buffer[sz-1] == '\n')
674 line_buffer[--sz] = '\0';
676 line_ptr = line_buffer;
677 while (*line_ptr != '\0' && (unsigned char)*line_ptr <= ' ')
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 == '-');
1616 unsigned scale_shift;
1618 if (sizeof(value) <= sizeof(long))
1619 value = strtoul(line_ptr + 1, NULL, 10);
1621 value = strtoull(line_ptr + 1, NULL, 10);
1623 /* (1) if 2nd char is digit, use_default = 0.
1624 * (2) move line_ptr to first non-digit.
1626 while (isdigit(*++line_ptr))
1630 switch (*line_ptr | 0x20) {
1632 scale_shift = 10; /* 1024 */
1635 scale_shift = 20; /* 1024*1024 */
1638 scale_shift = 30; /* 1024*1024*1024 */
1641 scale_shift = 40; /* 1024*1024*1024*1024 */
1650 bytes = (ullong) value << scale_shift;
1651 unit = sector_size * units_per_sector;
1652 bytes += unit/2; /* round */
1654 value = (bytes != 0 ? bytes - 1 : 0);
1660 if (sizeof(value) <= sizeof(long))
1661 value = strtoul(line_ptr, NULL, 10);
1663 value = strtoull(line_ptr, NULL, 10);
1664 while (isdigit(*line_ptr)) {
1671 printf("Using default value %u\n", value);
1673 if (value >= low && value <= high)
1675 puts("Value is out of range");
1681 get_partition(int warn, unsigned max)
1686 i = read_int(1, 0, max, 0, "Partition number") - 1;
1690 if ((!LABEL_IS_SUN && !LABEL_IS_SGI && !pe->part_table->sys_ind)
1691 || (LABEL_IS_SUN && (!sunlabel->partitions[i].num_sectors || !sunlabel->infos[i].id))
1692 || (LABEL_IS_SGI && !sgi_get_num_sectors(i))
1694 printf("Warning: partition %u has empty type\n", i+1);
1701 get_existing_partition(int warn, unsigned max)
1706 for (i = 0; i < max; i++) {
1707 struct pte *pe = &ptes[i];
1708 struct partition *p = pe->part_table;
1710 if (p && !is_cleared_partition(p)) {
1717 printf("Selected partition %u\n", pno+1);
1720 puts("No partition is defined yet!");
1724 return get_partition(warn, max);
1728 get_nonexisting_partition(int warn, unsigned max)
1733 for (i = 0; i < max; i++) {
1734 struct pte *pe = &ptes[i];
1735 struct partition *p = pe->part_table;
1737 if (p && is_cleared_partition(p)) {
1744 printf("Selected partition %u\n", pno+1);
1747 puts("All primary partitions have been defined already!");
1751 return get_partition(warn, max);
1758 display_in_cyl_units = !display_in_cyl_units;
1760 printf("Changing display/entry units to %s\n",
1765 toggle_active(int i)
1767 struct pte *pe = &ptes[i];
1768 struct partition *p = pe->part_table;
1770 if (IS_EXTENDED(p->sys_ind) && !p->boot_ind)
1771 printf("WARNING: Partition %u is an extended partition\n", i + 1);
1772 p->boot_ind = (p->boot_ind ? 0 : ACTIVE_FLAG);
1777 toggle_dos_compatibility_flag(void)
1779 dos_compatible_flag = 1 - dos_compatible_flag;
1780 if (dos_compatible_flag) {
1781 sector_offset = g_sectors;
1782 printf("DOS Compatibility flag is %sset\n", "");
1785 printf("DOS Compatibility flag is %sset\n", "not ");
1790 delete_partition(int i)
1792 struct pte *pe = &ptes[i];
1793 struct partition *p = pe->part_table;
1794 struct partition *q = pe->ext_pointer;
1796 /* Note that for the fifth partition (i == 4) we don't actually
1797 * decrement partitions.
1800 if (warn_geometry())
1801 return; /* C/H/S not set */
1805 sun_delete_partition(i);
1809 sgi_delete_partition(i);
1814 if (IS_EXTENDED(p->sys_ind) && i == ext_index) {
1816 ptes[ext_index].ext_pointer = NULL;
1817 extended_offset = 0;
1823 if (!q->sys_ind && i > 4) {
1824 /* the last one in the chain - just delete */
1827 clear_partition(ptes[i].ext_pointer);
1828 ptes[i].changed = 1;
1830 /* not the last one - further ones will be moved down */
1832 /* delete this link in the chain */
1833 p = ptes[i-1].ext_pointer;
1835 set_start_sect(p, get_start_sect(q));
1836 set_nr_sects(p, get_nr_sects(q));
1837 ptes[i-1].changed = 1;
1838 } else if (g_partitions > 5) { /* 5 will be moved to 4 */
1839 /* the first logical in a longer chain */
1842 if (pe->part_table) /* prevent SEGFAULT */
1843 set_start_sect(pe->part_table,
1844 get_partition_start_from_dev_start(pe) -
1846 pe->offset_from_dev_start = extended_offset;
1850 if (g_partitions > 5) {
1852 while (i < g_partitions) {
1853 ptes[i] = ptes[i+1];
1857 /* the only logical: clear only */
1858 clear_partition(ptes[i].part_table);
1866 int i, sys, origsys;
1867 struct partition *p;
1869 /* If sgi_label then don't use get_existing_partition,
1870 let the user select a partition, since get_existing_partition()
1871 only works for Linux like partition tables. */
1872 if (!LABEL_IS_SGI) {
1873 i = get_existing_partition(0, g_partitions);
1875 i = get_partition(0, g_partitions);
1879 p = ptes[i].part_table;
1880 origsys = sys = get_sysid(i);
1882 /* if changing types T to 0 is allowed, then
1883 the reverse change must be allowed, too */
1884 if (!sys && !LABEL_IS_SGI && !LABEL_IS_SUN && !get_nr_sects(p)) {
1885 printf("Partition %u does not exist yet!\n", i + 1);
1889 sys = read_hex(get_sys_types());
1891 if (!sys && !LABEL_IS_SGI && !LABEL_IS_SUN) {
1892 puts("Type 0 means free space to many systems\n"
1893 "(but not to Linux). Having partitions of\n"
1894 "type 0 is probably unwise.");
1898 if (!LABEL_IS_SUN && !LABEL_IS_SGI) {
1899 if (IS_EXTENDED(sys) != IS_EXTENDED(p->sys_ind)) {
1900 puts("You cannot change a partition into"
1901 " an extended one or vice versa");
1907 #if ENABLE_FEATURE_SUN_LABEL
1908 if (LABEL_IS_SUN && i == 2 && sys != SUN_WHOLE_DISK)
1909 puts("Consider leaving partition 3 "
1910 "as Whole disk (5),\n"
1911 "as SunOS/Solaris expects it and "
1912 "even Linux likes it\n");
1914 #if ENABLE_FEATURE_SGI_LABEL
1917 (i == 10 && sys != SGI_ENTIRE_DISK) ||
1918 (i == 8 && sys != 0)
1921 puts("Consider leaving partition 9 "
1922 "as volume header (0),\nand "
1923 "partition 11 as entire volume (6)"
1924 "as IRIX expects it\n");
1930 sun_change_sysid(i, sys);
1931 } else if (LABEL_IS_SGI) {
1932 sgi_change_sysid(i, sys);
1936 printf("Changed system type of partition %u "
1937 "to %x (%s)\n", i + 1, sys,
1938 partition_type(sys));
1939 ptes[i].changed = 1;
1940 //if (is_dos_partition(origsys) || is_dos_partition(sys))
1946 #endif /* FEATURE_FDISK_WRITABLE */
1949 /* check_consistency() and linear2chs() added Sat Mar 6 12:28:16 1993,
1950 * faith@cs.unc.edu, based on code fragments from pfdisk by Gordon W. Ross,
1951 * Jan. 1990 (version 1.2.1 by Gordon W. Ross Aug. 1990; Modified by S.
1952 * Lubkin Oct. 1991). */
1955 linear2chs(unsigned ls, unsigned *c, unsigned *h, unsigned *s)
1957 int spc = g_heads * g_sectors;
1961 *h = ls / g_sectors;
1962 *s = ls % g_sectors + 1; /* sectors count from 1 */
1966 check_consistency(const struct partition *p, int partition)
1968 unsigned pbc, pbh, pbs; /* physical beginning c, h, s */
1969 unsigned pec, peh, pes; /* physical ending c, h, s */
1970 unsigned lbc, lbh, lbs; /* logical beginning c, h, s */
1971 unsigned lec, leh, les; /* logical ending c, h, s */
1973 if (!g_heads || !g_sectors || (partition >= 4))
1974 return; /* do not check extended partitions */
1976 /* physical beginning c, h, s */
1977 pbc = cylinder(p->sector, p->cyl);
1979 pbs = sector(p->sector);
1981 /* physical ending c, h, s */
1982 pec = cylinder(p->end_sector, p->end_cyl);
1984 pes = sector(p->end_sector);
1986 /* compute logical beginning (c, h, s) */
1987 linear2chs(get_start_sect(p), &lbc, &lbh, &lbs);
1989 /* compute logical ending (c, h, s) */
1990 linear2chs(get_start_sect(p) + get_nr_sects(p) - 1, &lec, &leh, &les);
1992 /* Same physical / logical beginning? */
1993 if (g_cylinders <= 1024 && (pbc != lbc || pbh != lbh || pbs != lbs)) {
1994 printf("Partition %u has different physical/logical "
1995 "start (non-Linux?):\n", partition + 1);
1996 printf(" phys=(%u,%u,%u) ", pbc, pbh, pbs);
1997 printf("logical=(%u,%u,%u)\n", lbc, lbh, lbs);
2000 /* Same physical / logical ending? */
2001 if (g_cylinders <= 1024 && (pec != lec || peh != leh || pes != les)) {
2002 printf("Partition %u has different physical/logical "
2003 "end:\n", partition + 1);
2004 printf(" phys=(%u,%u,%u) ", pec, peh, pes);
2005 printf("logical=(%u,%u,%u)\n", lec, leh, les);
2010 list_disk_geometry(void)
2012 ullong bytes = ((ullong)total_number_of_sectors << 9);
2013 ullong xbytes = bytes / (1024*1024);
2016 if (xbytes >= 10000) {
2017 xbytes += 512; /* fdisk util-linux 2.28 does this */
2021 printf("Disk %s: %llu %cB, %llu bytes, %"SECT_FMT"u sectors\n"
2022 "%u cylinders, %u heads, %u sectors/track\n"
2023 "Units: %s of %u * %u = %u bytes\n\n",
2024 disk_device, xbytes, x,
2025 bytes, total_number_of_sectors,
2026 g_cylinders, g_heads, g_sectors,
2028 units_per_sector, sector_size, units_per_sector * sector_size
2033 * Check whether partition entries are ordered by their starting positions.
2034 * Return 0 if OK. Return i if partition i should have been earlier.
2035 * Two separate checks: primary and logical partitions.
2038 wrong_p_order(int *prev)
2040 const struct pte *pe;
2041 const struct partition *p;
2042 sector_t last_p_start_pos = 0, p_start_pos;
2043 unsigned i, last_i = 0;
2045 for (i = 0; i < g_partitions; i++) {
2048 last_p_start_pos = 0;
2053 p_start_pos = get_partition_start_from_dev_start(pe);
2055 if (last_p_start_pos > p_start_pos) {
2061 last_p_start_pos = p_start_pos;
2068 #if ENABLE_FEATURE_FDISK_ADVANCED
2070 * Fix the chain of logicals.
2071 * extended_offset is unchanged, the set of sectors used is unchanged
2072 * The chain is sorted so that sectors increase, and so that
2073 * starting sectors increase.
2075 * After this it may still be that cfdisk doesnt like the table.
2076 * (This is because cfdisk considers expanded parts, from link to
2077 * end of partition, and these may still overlap.)
2079 * sfdisk /dev/hda > ohda; sfdisk /dev/hda < ohda
2083 fix_chain_of_logicals(void)
2085 int j, oj, ojj, sj, sjj;
2086 struct partition *pj,*pjj,tmp;
2088 /* Stage 1: sort sectors but leave sector of part 4 */
2089 /* (Its sector is the global extended_offset.) */
2091 for (j = 5; j < g_partitions - 1; j++) {
2092 oj = ptes[j].offset_from_dev_start;
2093 ojj = ptes[j+1].offset_from_dev_start;
2095 ptes[j].offset_from_dev_start = ojj;
2096 ptes[j+1].offset_from_dev_start = oj;
2097 pj = ptes[j].part_table;
2098 set_start_sect(pj, get_start_sect(pj)+oj-ojj);
2099 pjj = ptes[j+1].part_table;
2100 set_start_sect(pjj, get_start_sect(pjj)+ojj-oj);
2101 set_start_sect(ptes[j-1].ext_pointer,
2102 ojj-extended_offset);
2103 set_start_sect(ptes[j].ext_pointer,
2104 oj-extended_offset);
2109 /* Stage 2: sort starting sectors */
2111 for (j = 4; j < g_partitions - 1; j++) {
2112 pj = ptes[j].part_table;
2113 pjj = ptes[j+1].part_table;
2114 sj = get_start_sect(pj);
2115 sjj = get_start_sect(pjj);
2116 oj = ptes[j].offset_from_dev_start;
2117 ojj = ptes[j+1].offset_from_dev_start;
2118 if (oj+sj > ojj+sjj) {
2122 set_start_sect(pj, ojj+sjj-oj);
2123 set_start_sect(pjj, oj+sj-ojj);
2128 /* Probably something was changed */
2129 for (j = 4; j < g_partitions; j++)
2130 ptes[j].changed = 1;
2135 fix_partition_table_order(void)
2137 struct pte *pei, *pek;
2140 if (!wrong_p_order(NULL)) {
2141 puts("Ordering is already correct\n");
2145 while ((i = wrong_p_order(&k)) != 0 && i < 4) {
2146 /* partition i should have come earlier, move it */
2147 /* We have to move data in the MBR */
2148 struct partition *pi, *pk, *pe, pbuf;
2152 pe = pei->ext_pointer;
2153 pei->ext_pointer = pek->ext_pointer;
2154 pek->ext_pointer = pe;
2156 pi = pei->part_table;
2157 pk = pek->part_table;
2159 memmove(&pbuf, pi, sizeof(struct partition));
2160 memmove(pi, pk, sizeof(struct partition));
2161 memmove(pk, &pbuf, sizeof(struct partition));
2163 pei->changed = pek->changed = 1;
2167 fix_chain_of_logicals();
2174 chs_string11(unsigned cyl, unsigned head, unsigned sect)
2176 char *buf = auto_string(xzalloc(sizeof(int)*3 * 3));
2177 sprintf(buf, "%u,%u,%u", cylinder(sect,cyl), head, sector(sect));
2182 list_table(int xtra)
2187 sun_list_table(xtra);
2191 sgi_list_table(xtra);
2195 gpt_list_table(xtra);
2199 list_disk_geometry();
2202 xbsd_print_disklabel(xtra);
2206 /* Heuristic: we list partition 3 of /dev/foo as /dev/foo3,
2207 * but if the device name ends in a digit, say /dev/foo1,
2208 * then the partition is called /dev/foo1p3.
2210 w = strlen(disk_device);
2211 if (w && isdigit(disk_device[w-1]))
2216 printf("%-*s Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type\n",
2219 for (i = 0; i < g_partitions; i++) {
2220 const struct partition *p;
2221 const struct pte *pe = &ptes[i];
2224 sector_t start_sect;
2229 if (!p || is_cleared_partition(p))
2232 sprintf(boot4, "%02x", p->boot_ind);
2233 if ((p->boot_ind & 0x7f) == 0) {
2234 /* 0x80 shown as '*', 0x00 is ' ' */
2235 boot4[0] = p->boot_ind ? '*' : ' ';
2239 start_sect = get_partition_start_from_dev_start(pe);
2240 end_sect = start_sect;
2241 nr_sects = get_nr_sects(p);
2243 end_sect += nr_sects - 1;
2245 smart_ulltoa5((ullong)nr_sects * sector_size,
2246 numstr6, " KMGTPEZY")[0] = '\0';
2248 #define SFMT SECT_FMT
2249 // Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type
2250 printf("%s%s %-11s"/**/" %-11s"/**/" %10"SFMT"u %10"SFMT"u %10"SFMT"u %s %2x %s\n",
2251 partname(disk_device, i+1, w+2),
2253 chs_string11(p->cyl, p->head, p->sector),
2254 chs_string11(p->end_cyl, p->end_head, p->end_sector),
2260 partition_type(p->sys_ind)
2263 check_consistency(p, i);
2266 /* Is partition table in disk order? It need not be, but... */
2267 /* partition table entries are not checked for correct order
2268 * if this is a sgi, sun or aix labeled disk... */
2269 if (LABEL_IS_DOS && wrong_p_order(NULL)) {
2271 puts("\nPartition table entries are not in disk order");
2275 #if ENABLE_FEATURE_FDISK_ADVANCED
2277 x_list_table(int extend)
2279 const struct pte *pe;
2280 const struct partition *p;
2283 printf("\nDisk %s: %u heads, %u sectors, %u cylinders\n\n",
2284 disk_device, g_heads, g_sectors, g_cylinders);
2285 puts("Nr AF Hd Sec Cyl Hd Sec Cyl Start Size ID");
2286 for (i = 0; i < g_partitions; i++) {
2288 p = (extend ? pe->ext_pointer : pe->part_table);
2290 printf("%2u %02x%4u%4u%5u%4u%4u%5u%11"SECT_FMT"u%11"SECT_FMT"u %02x\n",
2294 cylinder(p->sector, p->cyl),
2296 sector(p->end_sector),
2297 cylinder(p->end_sector, p->end_cyl),
2303 check_consistency(p, i);
2309 #if ENABLE_FEATURE_FDISK_WRITABLE
2311 fill_bounds(sector_t *first, sector_t *last)
2314 const struct pte *pe = &ptes[0];
2315 const struct partition *p;
2317 for (i = 0; i < g_partitions; pe++,i++) {
2319 if (!p->sys_ind || IS_EXTENDED(p->sys_ind)) {
2320 first[i] = 0xffffffff;
2323 first[i] = get_partition_start_from_dev_start(pe);
2324 last[i] = first[i] + get_nr_sects(p) - 1;
2330 check(int n, unsigned h, unsigned s, unsigned c, sector_t start)
2332 sector_t total, real_s, real_c;
2334 real_s = sector(s) - 1;
2335 real_c = cylinder(s, c);
2336 total = (real_c * g_sectors + real_s) * g_heads + h;
2338 printf("Partition %u contains sector 0\n", n);
2340 printf("Partition %u: head %u greater than maximum %u\n",
2342 if (real_s >= g_sectors)
2343 printf("Partition %u: sector %u greater than "
2344 "maximum %u\n", n, s, g_sectors);
2345 if (real_c >= g_cylinders)
2346 printf("Partition %u: cylinder %"SECT_FMT"u greater than "
2347 "maximum %u\n", n, real_c + 1, g_cylinders);
2348 if (g_cylinders <= 1024 && start != total)
2349 printf("Partition %u: previous sectors %"SECT_FMT"u disagrees with "
2350 "total %"SECT_FMT"u\n", n, start, total);
2359 sector_t first[g_partitions], last[g_partitions];
2360 struct partition *p;
2362 if (warn_geometry())
2374 fill_bounds(first, last);
2375 for (i = 0; i < g_partitions; i++) {
2376 struct pte *pe = &ptes[i];
2379 if (p->sys_ind && !IS_EXTENDED(p->sys_ind)) {
2380 check_consistency(p, i);
2381 if (get_partition_start_from_dev_start(pe) < first[i])
2382 printf("Warning: bad start-of-data in "
2383 "partition %u\n", i + 1);
2384 check(i + 1, p->end_head, p->end_sector, p->end_cyl,
2386 total += last[i] + 1 - first[i];
2387 for (j = 0; j < i; j++) {
2388 if ((first[i] >= first[j] && first[i] <= last[j])
2389 || ((last[i] <= last[j] && last[i] >= first[j]))) {
2390 printf("Warning: partition %u overlaps "
2391 "partition %u\n", j + 1, i + 1);
2392 total += first[i] >= first[j] ?
2393 first[i] : first[j];
2394 total -= last[i] <= last[j] ?
2401 if (extended_offset) {
2402 struct pte *pex = &ptes[ext_index];
2403 sector_t e_last = get_start_sect(pex->part_table) +
2404 get_nr_sects(pex->part_table) - 1;
2406 for (i = 4; i < g_partitions; i++) {
2408 p = ptes[i].part_table;
2410 if (i != 4 || i + 1 < g_partitions)
2411 printf("Warning: partition %u "
2412 "is empty\n", i + 1);
2413 } else if (first[i] < extended_offset || last[i] > e_last) {
2414 printf("Logical partition %u not entirely in "
2415 "partition %u\n", i + 1, ext_index + 1);
2420 chs_size = (sector_t)g_heads * g_sectors * g_cylinders;
2421 if (total > chs_size)
2422 printf("Total allocated sectors %u"
2423 " greater than CHS size %"SECT_FMT"u\n",
2427 total = chs_size - total;
2429 printf("%"SECT_FMT"u unallocated sectors\n", total);
2434 add_partition(int n, int sys)
2436 char mesg[256]; /* 48 does not suffice in Japanese */
2437 int i, num_read = 0;
2438 struct partition *p = ptes[n].part_table;
2439 struct partition *q = ptes[ext_index].part_table;
2440 sector_t limit, temp;
2441 sector_t start, stop = 0;
2442 sector_t first[g_partitions], last[g_partitions];
2444 if (p && p->sys_ind) {
2445 printf(msg_part_already_defined, n + 1);
2448 fill_bounds(first, last);
2450 start = sector_offset;
2451 if (display_in_cyl_units || !total_number_of_sectors)
2452 limit = (sector_t) g_heads * g_sectors * g_cylinders - 1;
2454 limit = total_number_of_sectors - 1;
2455 if (extended_offset) {
2456 first[ext_index] = extended_offset;
2457 last[ext_index] = get_start_sect(q) +
2458 get_nr_sects(q) - 1;
2461 start = extended_offset + sector_offset;
2462 limit = get_start_sect(q) + get_nr_sects(q) - 1;
2464 if (display_in_cyl_units)
2465 for (i = 0; i < g_partitions; i++)
2466 first[i] = (cround(first[i]) - 1) * units_per_sector;
2468 snprintf(mesg, sizeof(mesg), "First %s", str_units(SINGULAR));
2471 for (i = 0; i < g_partitions; i++) {
2474 if (start == ptes[i].offset_from_dev_start)
2475 start += sector_offset;
2476 lastplusoff = last[i] + ((n < 4) ? 0 : sector_offset);
2477 if (start >= first[i] && start <= lastplusoff)
2478 start = lastplusoff + 1;
2482 if (start >= temp+units_per_sector && num_read) {
2483 printf("Sector %"SECT_FMT"u is already allocated\n", temp);
2487 if (!num_read && start == temp) {
2488 sector_t saved_start;
2490 saved_start = start;
2491 start = read_int(cround(saved_start), cround(saved_start), cround(limit), 0, mesg);
2492 if (display_in_cyl_units) {
2493 start = (start - 1) * units_per_sector;
2494 if (start < saved_start)
2495 start = saved_start;
2499 } while (start != temp || !num_read);
2500 if (n > 4) { /* NOT for fifth partition */
2501 struct pte *pe = &ptes[n];
2503 pe->offset_from_dev_start = start - sector_offset;
2504 if (pe->offset_from_dev_start == extended_offset) { /* must be corrected */
2505 pe->offset_from_dev_start++;
2506 if (sector_offset == 1)
2511 for (i = 0; i < g_partitions; i++) {
2512 struct pte *pe = &ptes[i];
2514 if (start < pe->offset_from_dev_start && limit >= pe->offset_from_dev_start)
2515 limit = pe->offset_from_dev_start - 1;
2516 if (start < first[i] && limit >= first[i])
2517 limit = first[i] - 1;
2519 if (start > limit) {
2520 puts("No free sectors available");
2525 if (cround(start) == cround(limit)) {
2528 snprintf(mesg, sizeof(mesg),
2529 "Last %s or +size{,K,M,G,T}",
2532 stop = read_int(cround(start), cround(limit), cround(limit), cround(start), mesg);
2533 if (display_in_cyl_units) {
2534 stop = stop * units_per_sector - 1;
2540 set_partition(n, 0, start, stop, sys);
2542 set_partition(n - 1, 1, ptes[n].offset_from_dev_start, stop, EXTENDED);
2544 if (IS_EXTENDED(sys)) {
2545 struct pte *pe4 = &ptes[4];
2546 struct pte *pen = &ptes[n];
2549 pen->ext_pointer = p;
2550 pe4->offset_from_dev_start = extended_offset = start;
2551 pe4->sectorbuffer = xzalloc(sector_size);
2552 pe4->part_table = pt_offset(pe4->sectorbuffer, 0);
2553 pe4->ext_pointer = pe4->part_table + 1;
2562 if (g_partitions > 5 || ptes[4].part_table->sys_ind) {
2563 struct pte *pe = &ptes[g_partitions];
2565 pe->sectorbuffer = xzalloc(sector_size);
2566 pe->part_table = pt_offset(pe->sectorbuffer, 0);
2567 pe->ext_pointer = pe->part_table + 1;
2568 pe->offset_from_dev_start = 0;
2572 add_partition(g_partitions - 1, LINUX_NATIVE);
2578 int i, free_primary = 0;
2580 if (warn_geometry())
2584 add_sun_partition(get_partition(0, g_partitions), LINUX_NATIVE);
2588 sgi_add_partition(get_partition(0, g_partitions), LINUX_NATIVE);
2592 puts("Sorry - this fdisk cannot handle AIX disk labels.\n"
2593 "If you want to add DOS-type partitions, create a new empty DOS partition\n"
2594 "table first (use 'o'). This will destroy the present disk contents.");
2598 for (i = 0; i < 4; i++)
2599 free_primary += !ptes[i].part_table->sys_ind;
2601 if (!free_primary && g_partitions >= MAXIMUM_PARTS) {
2602 puts("The maximum number of partitions has been created");
2606 if (!free_primary) {
2607 if (extended_offset)
2610 puts("You must delete some partition and add "
2611 "an extended partition first");
2614 snprintf(line, sizeof(line),
2616 " p primary partition (1-4)\n"
2619 "l logical (5 or over)" : "e extended"));
2621 c = read_nonempty(line);
2622 if ((c | 0x20) == 'p') {
2623 i = get_nonexisting_partition(0, 4);
2625 add_partition(i, LINUX_NATIVE);
2628 if (c == 'l' && extended_offset) {
2632 if (c == 'e' && !extended_offset) {
2633 i = get_nonexisting_partition(0, 4);
2635 add_partition(i, EXTENDED);
2638 printf("Invalid partition number "
2639 "for type '%c'\n", c);
2645 reread_partition_table(int leave)
2649 puts("Calling ioctl() to re-read partition table");
2651 /* Users with slow external USB disks on a 320MHz ARM system (year 2011)
2652 * report that sleep is needed, otherwise BLKRRPART may fail with -EIO:
2655 i = ioctl_or_perror(dev_fd, BLKRRPART, NULL,
2656 "WARNING: rereading partition table "
2657 "failed, kernel still uses old table");
2661 "\nWARNING: If you have created or modified any DOS 6.x\n"
2662 "partitions, please see the fdisk manual page for additional\n"
2667 if (ENABLE_FEATURE_CLEAN_UP)
2679 for (i = 0; i < 3; i++)
2680 if (ptes[i].changed)
2681 ptes[3].changed = 1;
2682 for (i = 3; i < g_partitions; i++) {
2683 struct pte *pe = &ptes[i];
2685 write_part_table_flag(pe->sectorbuffer);
2686 write_sector(pe->offset_from_dev_start, pe->sectorbuffer);
2690 else if (LABEL_IS_SGI) {
2691 /* no test on change? the "altered" msg below might be mistaken */
2694 else if (LABEL_IS_SUN) {
2695 for (i = 0; i < 8; i++) {
2696 if (ptes[i].changed) {
2703 puts("The partition table has been altered.");
2704 reread_partition_table(1);
2706 #endif /* FEATURE_FDISK_WRITABLE */
2708 #if ENABLE_FEATURE_FDISK_ADVANCED
2709 #define MAX_PER_LINE 16
2711 print_buffer(char *pbuffer)
2715 for (i = 0, l = 0; i < sector_size; i++, l++) {
2717 printf("0x%03X:", i);
2718 printf(" %02X", (unsigned char) pbuffer[i]);
2719 if (l == MAX_PER_LINE - 1) {
2734 printf("Device: %s\n", disk_device);
2735 if (LABEL_IS_SGI || LABEL_IS_SUN)
2736 print_buffer(MBRbuffer);
2738 for (i = 3; i < g_partitions; i++)
2739 print_buffer(ptes[i].sectorbuffer);
2744 move_begin(unsigned i)
2746 struct pte *pe = &ptes[i];
2747 struct partition *p = pe->part_table;
2748 sector_t new, first, nr_sects;
2750 if (warn_geometry())
2752 nr_sects = get_nr_sects(p);
2753 if (!p->sys_ind || !nr_sects || IS_EXTENDED(p->sys_ind)) {
2754 printf("Partition %u has no data area\n", i + 1);
2757 first = get_partition_start_from_dev_start(pe); /* == pe->offset_from_dev_start + get_start_sect(p) */
2758 new = read_int(0 /*was:first*/, first, first + nr_sects - 1, first, "New beginning of data");
2760 sector_t new_relative = new - pe->offset_from_dev_start;
2761 nr_sects += (get_start_sect(p) - new_relative);
2762 set_start_sect(p, new_relative);
2763 set_nr_sects(p, nr_sects);
2764 read_nonempty("Recalculate C/H/S values? (Y/N): ");
2765 if ((line_ptr[0] | 0x20) == 'y')
2766 set_hsc_start_end(p, new, new + nr_sects - 1);
2778 c = 0x20 | read_nonempty("Expert command (m for help): ");
2786 move_begin(get_partition(0, g_partitions));
2789 user_cylinders = g_cylinders =
2790 read_int(1, g_cylinders, 1048576, 0,
2791 "Number of cylinders");
2793 sun_set_ncyl(g_cylinders);
2803 else if (LABEL_IS_SUN)
2805 else if (LABEL_IS_DOS)
2810 fix_partition_table_order();
2813 #if ENABLE_FEATURE_SGI_LABEL
2818 user_heads = g_heads = read_int(1, g_heads, 256, 0, "Number of heads");
2836 if (ENABLE_FEATURE_CLEAN_UP)
2843 user_sectors = g_sectors = read_int(1, g_sectors, 63, 0, "Number of sectors");
2844 if (dos_compatible_flag) {
2845 sector_offset = g_sectors;
2846 puts("Warning: setting sector offset for DOS "
2855 write_table(); /* does not return */
2859 sun_set_pcylcount();
2866 #endif /* ADVANCED mode */
2869 is_ide_cdrom_or_tape(const char *device)
2873 struct stat statbuf;
2876 /* No device was given explicitly, and we are trying some
2877 likely things. But opening /dev/hdc may produce errors like
2878 "hdc: tray open or drive not ready"
2879 if it happens to be a CD-ROM drive. It even happens that
2880 the process hangs on the attempt to read a music CD.
2881 So try to be careful. This only works since 2.1.73. */
2883 if (!is_prefixed_with(device, "/dev/hd"))
2886 snprintf(buf, sizeof(buf), "/proc/ide/%s/media", device+5);
2887 procf = fopen_for_read(buf);
2888 if (procf != NULL && fgets(buf, sizeof(buf), procf))
2889 is_ide = (is_prefixed_with(buf, "cdrom") ||
2890 is_prefixed_with(buf, "tape"));
2892 /* Now when this proc file does not exist, skip the
2893 device when it is read-only. */
2894 if (stat(device, &statbuf) == 0)
2895 is_ide = ((statbuf.st_mode & 0222) == 0);
2904 open_list_and_close(const char *device, int user_specified)
2908 disk_device = device;
2909 if (setjmp(listingbuf))
2911 if (!user_specified)
2912 if (is_ide_cdrom_or_tape(device))
2915 /* Open disk_device, save file descriptor to dev_fd */
2917 gb = get_boot(TRY_ONLY);
2918 if (gb > 0) { /* I/O error */
2919 /* Ignore other errors, since we try IDE
2920 and SCSI hard disks which may not be
2921 installed on the system. */
2922 if (user_specified || errno == EACCES)
2923 bb_perror_msg("can't open '%s'", device);
2927 if (gb < 0) { /* no DOS signature */
2928 list_disk_geometry();
2931 #if ENABLE_FEATURE_OSF_LABEL
2932 if (bsd_trydev(device) < 0)
2934 printf("Disk %s doesn't contain a valid "
2935 "partition table\n", device);
2938 #if ENABLE_FEATURE_FDISK_WRITABLE
2939 if (!LABEL_IS_SUN && g_partitions > 4) {
2940 delete_partition(ext_index);
2948 /* Is it a whole disk? The digit check is still useful
2949 for Xen devices for example. */
2950 static int is_whole_disk(const char *disk)
2953 int fd = open(disk, O_RDONLY);
2956 struct hd_geometry geometry;
2957 int err = ioctl(fd, HDIO_GETGEO, &geometry);
2960 return (geometry.start == 0);
2963 /* Treat "nameN" as a partition name, not whole disk */
2964 /* note: mmcblk0 should work from the geometry check above */
2966 if (len != 0 && isdigit(disk[len - 1]))
2972 /* for fdisk -l: try all things in /proc/partitions
2973 that look like a partition name (do not end in a digit) */
2975 list_devs_in_proc_partititons(void)
2978 char line[100], ptname[100], devname[120];
2981 procpt = fopen_or_warn("/proc/partitions", "r");
2983 while (fgets(line, sizeof(line), procpt)) {
2984 if (sscanf(line, " %u %u %u %[^\n ]",
2985 &ma, &mi, &sz, ptname) != 4)
2988 sprintf(devname, "/dev/%s", ptname);
2989 if (is_whole_disk(devname))
2990 open_list_and_close(devname, 0);
2992 #if ENABLE_FEATURE_CLEAN_UP
2997 #if ENABLE_FEATURE_FDISK_WRITABLE
2999 unknown_command(int c)
3001 printf("%c: unknown command\n", c);
3005 int fdisk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
3006 int fdisk_main(int argc UNUSED_PARAM, char **argv)
3011 * fdisk -l [-b sectorsize] [-u] device ...
3012 * fdisk -s [partition] ...
3013 * fdisk [-b sectorsize] [-u] device
3015 * Options -C, -H, -S set the geometry.
3019 close_dev_fd(); /* needed: fd 3 must not stay closed */
3021 opt = getopt32(argv, "b:+C:+H:+lS:+u" IF_FEATURE_FDISK_BLKSIZE("s"),
3022 §or_size, &user_cylinders, &user_heads, &user_sectors);
3025 /* Ugly: this sector size is really per device,
3026 * so cannot be combined with multiple disks,
3027 * and the same goes for the C/H/S options.
3029 if (sector_size < 512
3030 || sector_size > 0x10000
3031 || (sector_size & (sector_size-1)) /* not power of 2 */
3036 user_set_sector_size = 1;
3038 if (user_heads <= 0 || user_heads >= 256)
3040 if (user_sectors <= 0 || user_sectors >= 64)
3043 display_in_cyl_units = 0; // -u
3045 #if ENABLE_FEATURE_FDISK_WRITABLE
3052 open_list_and_close(*argv, 1);
3055 /* we don't have device names, */
3056 /* use /proc/partitions instead */
3057 list_devs_in_proc_partititons();
3060 #if ENABLE_FEATURE_FDISK_WRITABLE
3064 #if ENABLE_FEATURE_FDISK_BLKSIZE
3071 for (j = 0; argv[j]; j++) {
3072 unsigned long long size;
3073 fd = xopen(argv[j], O_RDONLY);
3074 size = bb_BLKGETSIZE_sectors(fd) / 2;
3077 printf("%llu\n", size);
3079 printf("%s: %llu\n", argv[j], size);
3085 #if ENABLE_FEATURE_FDISK_WRITABLE
3086 if (!argv[0] || argv[1])
3089 disk_device = argv[0];
3090 get_boot(OPEN_MAIN);
3093 /* OSF label, and no DOS label */
3094 printf("Detected an OSF/1 disklabel on %s, entering "
3095 "disklabel mode\n", disk_device);
3097 /*Why do we do this? It seems to be counter-intuitive*/
3098 current_label_type = LABEL_DOS;
3099 /* If we return we may want to make an empty DOS label? */
3105 c = 0x20 | read_nonempty("Command (m for help): ");
3109 toggle_active(get_partition(1, g_partitions));
3110 else if (LABEL_IS_SUN)
3111 toggle_sunflags(get_partition(1, g_partitions),
3113 else if (LABEL_IS_SGI)
3114 sgi_set_bootpartition(
3115 get_partition(1, g_partitions));
3121 printf("\nThe current boot file is: %s\n",
3122 sgi_get_bootfile());
3123 if (read_maybe_empty("Please enter the name of the "
3124 "new boot file: ") == '\n')
3125 puts("Boot file unchanged");
3127 sgi_set_bootfile(line_ptr);
3129 #if ENABLE_FEATURE_OSF_LABEL
3136 toggle_dos_compatibility_flag();
3137 else if (LABEL_IS_SUN)
3138 toggle_sunflags(get_partition(1, g_partitions),
3140 else if (LABEL_IS_SGI)
3141 sgi_set_swappartition(
3142 get_partition(1, g_partitions));
3149 /* If sgi_label then don't use get_existing_partition,
3150 let the user select a partition, since
3151 get_existing_partition() only works for Linux-like
3153 if (!LABEL_IS_SGI) {
3154 j = get_existing_partition(1, g_partitions);
3156 j = get_partition(1, g_partitions);
3159 delete_partition(j);
3168 list_types(get_sys_types());
3183 if (ENABLE_FEATURE_CLEAN_UP)
3188 #if ENABLE_FEATURE_SUN_LABEL
3202 write_table(); /* does not return */
3204 #if ENABLE_FEATURE_FDISK_ADVANCED
3207 puts("\n\tSorry, no experts menu for SGI "
3208 "partition tables available\n");
3219 #endif /* FEATURE_FDISK_WRITABLE */