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 == 4294967295
174 #elif ULONG_MAX == 4294967295
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; // = 1;
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 display_in_cyl_units = 1; \
492 units_per_sector = 1; \
493 dos_compatible_flag = 1; \
497 /* TODO: move to libbb? */
498 /* TODO: return unsigned long long, FEATURE_FDISK_BLKSIZE _can_ handle
499 * disks > 2^32 sectors
501 static sector_t bb_BLKGETSIZE_sectors(int fd)
504 unsigned long longsectors;
506 if (ioctl(fd, BLKGETSIZE64, &v64) == 0) {
507 /* Got bytes, convert to 512 byte sectors */
509 if (v64 != (sector_t)v64) {
511 /* Not only DOS, but all other partition tables
512 * we support can't record more than 32 bit
513 * sector counts or offsets
515 bb_error_msg("device has more than 2^32 sectors, can't use all of them");
520 /* Needs temp of type long */
521 if (ioctl(fd, BLKGETSIZE, &longsectors)) {
522 /* Perhaps this is a disk image */
523 off_t sz = lseek(fd, 0, SEEK_END);
526 longsectors = (uoff_t)sz / sector_size;
527 lseek(fd, 0, SEEK_SET);
529 if (sizeof(long) > sizeof(sector_t)
530 && longsectors != (sector_t)longsectors
538 #define IS_EXTENDED(i) \
539 ((i) == EXTENDED || (i) == WIN98_EXTENDED || (i) == LINUX_EXTENDED)
541 #define cround(n) (display_in_cyl_units ? ((n)/units_per_sector)+1 : (n))
543 #define scround(x) (((x)+units_per_sector-1)/units_per_sector)
545 #define pt_offset(b, n) \
546 ((struct partition *)((b) + 0x1be + (n) * sizeof(struct partition)))
548 #define sector(s) ((s) & 0x3f)
550 #define cylinder(s, c) ((c) | (((s) & 0xc0) << 2))
555 /* Not really closing, but making sure it is open, and to harmless place */
556 xmove_fd(xopen(bb_dev_null, O_RDONLY), dev_fd);
559 /* Return partition name */
561 partname(const char *dev, int pno, int lth)
568 bufp = auto_string(xzalloc(80));
574 if (isdigit(dev[w-1]))
577 /* devfs kludge - note: fdisk partition names are not supposed
578 to equal kernel names, so there is no reason to do this */
579 if (strcmp(dev + w - 4, "disc") == 0) {
587 snprintf(bufp, bufsiz, "%*.*s%s%-2u",
588 lth-wp-2, w, dev, p, pno);
590 snprintf(bufp, bufsiz, "%.*s%s%-2u", w, dev, p, pno);
595 static ALWAYS_INLINE struct partition *
596 get_part_table(int i)
598 return ptes[i].part_table;
603 { /* n==1: use singular */
605 return display_in_cyl_units ? "cylinder" : "sector";
606 return display_in_cyl_units ? "cylinders" : "sectors";
610 valid_part_table_flag(const char *mbuffer)
612 return (mbuffer[510] == 0x55 && (uint8_t)mbuffer[511] == 0xaa);
615 static void fdisk_fatal(const char *why)
619 longjmp(listingbuf, 1);
621 bb_error_msg_and_die(why, disk_device);
625 seek_sector(sector_t secno)
627 #if ENABLE_FDISK_SUPPORT_LARGE_DISKS
628 off64_t off = (off64_t)secno * sector_size;
629 if (lseek64(dev_fd, off, SEEK_SET) == (off64_t) -1)
630 fdisk_fatal(unable_to_seek);
632 uint64_t off = (uint64_t)secno * sector_size;
633 if (off > MAXINT(off_t)
634 || lseek(dev_fd, (off_t)off, SEEK_SET) == (off_t) -1
636 fdisk_fatal(unable_to_seek);
641 #if ENABLE_FEATURE_FDISK_WRITABLE
642 /* Read line; return 0 or first printable char */
644 read_line(const char *prompt)
648 sz = read_line_input(NULL, prompt, line_buffer, sizeof(line_buffer));
650 exit(EXIT_SUCCESS); /* Ctrl-D or Ctrl-C */
652 if (line_buffer[sz-1] == '\n')
653 line_buffer[--sz] = '\0';
655 line_ptr = line_buffer;
656 while (*line_ptr != '\0' && (unsigned char)*line_ptr <= ' ')
662 set_all_unchanged(void)
666 for (i = 0; i < MAXIMUM_PARTS; i++)
670 static ALWAYS_INLINE void
676 static ALWAYS_INLINE void
677 write_part_table_flag(char *b)
684 read_nonempty(const char *mesg)
686 while (!read_line(mesg))
692 read_maybe_empty(const char *mesg)
694 if (!read_line(mesg)) {
695 line_ptr = line_buffer;
703 read_hex(const char *const *sys)
707 read_nonempty("Hex code (type L to list codes): ");
708 if ((line_ptr[0] | 0x20) == 'l') {
712 v = bb_strtoul(line_ptr, NULL, 16);
719 write_sector(sector_t secno, const void *buf)
722 xwrite(dev_fd, buf, sector_size);
724 #endif /* FEATURE_FDISK_WRITABLE */
727 #include "fdisk_aix.c"
729 struct sun_partition {
730 unsigned char info[128]; /* Informative text string */
731 unsigned char spare0[14];
733 unsigned char spare1;
735 unsigned char spare2;
738 unsigned char spare1[246]; /* Boot information etc. */
739 unsigned short rspeed; /* Disk rotational speed */
740 unsigned short pcylcount; /* Physical cylinder count */
741 unsigned short sparecyl; /* extra sects per cylinder */
742 unsigned char spare2[4]; /* More magic... */
743 unsigned short ilfact; /* Interleave factor */
744 unsigned short ncyl; /* Data cylinder count */
745 unsigned short nacyl; /* Alt. cylinder count */
746 unsigned short ntrks; /* Tracks per cylinder */
747 unsigned short nsect; /* Sectors per track */
748 unsigned char spare3[4]; /* Even more magic... */
749 struct sun_partinfo {
750 uint32_t start_cylinder;
751 uint32_t num_sectors;
753 unsigned short magic; /* Magic number */
754 unsigned short csum; /* Label xor'd checksum */
756 typedef struct sun_partition sun_partition;
757 #define sunlabel ((sun_partition *)MBRbuffer)
758 STATIC_OSF void bsd_select(void);
759 STATIC_OSF void xbsd_print_disklabel(int);
760 #include "fdisk_osf.c"
762 STATIC_GPT void gpt_list_table(int xtra);
763 #include "fdisk_gpt.c"
765 #if ENABLE_FEATURE_SGI_LABEL || ENABLE_FEATURE_SUN_LABEL
767 fdisk_swap16(uint16_t x)
769 return (x << 8) | (x >> 8);
773 fdisk_swap32(uint32_t x)
776 ((x & 0xFF00) << 8) |
777 ((x & 0xFF0000) >> 8) |
782 STATIC_SGI const char *const sgi_sys_types[];
783 STATIC_SGI unsigned sgi_get_num_sectors(int i);
784 STATIC_SGI int sgi_get_sysid(int i);
785 STATIC_SGI void sgi_delete_partition(int i);
786 STATIC_SGI void sgi_change_sysid(int i, int sys);
787 STATIC_SGI void sgi_list_table(int xtra);
788 #if ENABLE_FEATURE_FDISK_ADVANCED
789 STATIC_SGI void sgi_set_xcyl(void);
791 STATIC_SGI int verify_sgi(int verbose);
792 STATIC_SGI void sgi_add_partition(int n, int sys);
793 STATIC_SGI void sgi_set_swappartition(int i);
794 STATIC_SGI const char *sgi_get_bootfile(void);
795 STATIC_SGI void sgi_set_bootfile(const char* aFile);
796 STATIC_SGI void create_sgiinfo(void);
797 STATIC_SGI void sgi_write_table(void);
798 STATIC_SGI void sgi_set_bootpartition(int i);
799 #include "fdisk_sgi.c"
801 STATIC_SUN const char *const sun_sys_types[];
802 STATIC_SUN void sun_delete_partition(int i);
803 STATIC_SUN void sun_change_sysid(int i, int sys);
804 STATIC_SUN void sun_list_table(int xtra);
805 STATIC_SUN void add_sun_partition(int n, int sys);
806 #if ENABLE_FEATURE_FDISK_ADVANCED
807 STATIC_SUN void sun_set_alt_cyl(void);
808 STATIC_SUN void sun_set_ncyl(int cyl);
809 STATIC_SUN void sun_set_xcyl(void);
810 STATIC_SUN void sun_set_ilfact(void);
811 STATIC_SUN void sun_set_rspeed(void);
812 STATIC_SUN void sun_set_pcylcount(void);
814 STATIC_SUN void toggle_sunflags(int i, unsigned char mask);
815 STATIC_SUN void verify_sun(void);
816 STATIC_SUN void sun_write_table(void);
817 #include "fdisk_sun.c"
820 static inline_if_little_endian unsigned
821 read4_little_endian(const unsigned char *cp)
824 move_from_unaligned32(v, cp);
829 get_start_sect(const struct partition *p)
831 return read4_little_endian(p->start4);
835 get_nr_sects(const struct partition *p)
837 return read4_little_endian(p->size4);
840 #if ENABLE_FEATURE_FDISK_WRITABLE
841 /* start_sect and nr_sects are stored little endian on all machines */
842 /* moreover, they are not aligned correctly */
843 static inline_if_little_endian void
844 store4_little_endian(unsigned char *cp, unsigned val)
846 uint32_t v = SWAP_LE32(val);
847 move_to_unaligned32(cp, v);
851 set_start_sect(struct partition *p, unsigned start_sect)
853 store4_little_endian(p->start4, start_sect);
857 set_nr_sects(struct partition *p, unsigned nr_sects)
859 store4_little_endian(p->size4, nr_sects);
863 /* Allocate a buffer and read a partition table sector */
865 read_pte(struct pte *pe, sector_t offset)
867 pe->offset_from_dev_start = offset;
868 pe->sectorbuffer = xzalloc(sector_size);
870 /* xread would make us abort - bad for fdisk -l */
871 if (full_read(dev_fd, pe->sectorbuffer, sector_size) != sector_size)
872 fdisk_fatal(unable_to_read);
873 #if ENABLE_FEATURE_FDISK_WRITABLE
876 pe->part_table = pe->ext_pointer = NULL;
880 get_partition_start_from_dev_start(const struct pte *pe)
882 return pe->offset_from_dev_start + get_start_sect(pe->part_table);
885 #if ENABLE_FEATURE_FDISK_WRITABLE
887 * Avoid warning about DOS partitions when no DOS partition was changed.
888 * Here a heuristic "is probably dos partition".
889 * We might also do the opposite and warn in all cases except
890 * for "is probably nondos partition".
894 is_dos_partition(int t)
896 return (t == 1 || t == 4 || t == 6 ||
897 t == 0x0b || t == 0x0c || t == 0x0e ||
898 t == 0x11 || t == 0x12 || t == 0x14 || t == 0x16 ||
899 t == 0x1b || t == 0x1c || t == 0x1e || t == 0x24 ||
900 t == 0xc1 || t == 0xc4 || t == 0xc6);
907 puts("Command Action");
909 puts("a\ttoggle a read only flag"); /* sun */
910 puts("b\tedit bsd disklabel");
911 puts("c\ttoggle the mountable flag"); /* sun */
912 puts("d\tdelete a partition");
913 puts("l\tlist known partition types");
914 puts("n\tadd a new partition");
915 puts("o\tcreate a new empty DOS partition table");
916 puts("p\tprint the partition table");
917 puts("q\tquit without saving changes");
918 puts("s\tcreate a new empty Sun disklabel"); /* sun */
919 puts("t\tchange a partition's system id");
920 puts("u\tchange display/entry units");
921 puts("v\tverify the partition table");
922 puts("w\twrite table to disk and exit");
923 #if ENABLE_FEATURE_FDISK_ADVANCED
924 puts("x\textra functionality (experts only)");
926 } else if (LABEL_IS_SGI) {
927 puts("a\tselect bootable partition"); /* sgi flavour */
928 puts("b\tedit bootfile entry"); /* sgi */
929 puts("c\tselect sgi swap partition"); /* sgi flavour */
930 puts("d\tdelete a partition");
931 puts("l\tlist known partition types");
932 puts("n\tadd a new partition");
933 puts("o\tcreate a new empty DOS partition table");
934 puts("p\tprint the partition table");
935 puts("q\tquit without saving changes");
936 puts("s\tcreate a new empty Sun disklabel"); /* sun */
937 puts("t\tchange a partition's system id");
938 puts("u\tchange display/entry units");
939 puts("v\tverify the partition table");
940 puts("w\twrite table to disk and exit");
941 } else if (LABEL_IS_AIX) {
942 puts("o\tcreate a new empty DOS partition table");
943 puts("q\tquit without saving changes");
944 puts("s\tcreate a new empty Sun disklabel"); /* sun */
945 } else if (LABEL_IS_GPT) {
946 puts("o\tcreate a new empty DOS partition table");
947 puts("p\tprint the partition table");
948 puts("q\tquit without saving changes");
949 puts("s\tcreate a new empty Sun disklabel"); /* sun */
951 puts("a\ttoggle a bootable flag");
952 puts("b\tedit bsd disklabel");
953 puts("c\ttoggle the dos compatibility flag");
954 puts("d\tdelete a partition");
955 puts("l\tlist known partition types");
956 puts("n\tadd a new partition");
957 puts("o\tcreate a new empty DOS partition table");
958 puts("p\tprint the partition table");
959 puts("q\tquit without saving changes");
960 puts("s\tcreate a new empty Sun disklabel"); /* sun */
961 puts("t\tchange a partition's system id");
962 puts("u\tchange display/entry units");
963 puts("v\tverify the partition table");
964 puts("w\twrite table to disk and exit");
965 #if ENABLE_FEATURE_FDISK_ADVANCED
966 puts("x\textra functionality (experts only)");
970 #endif /* FEATURE_FDISK_WRITABLE */
973 #if ENABLE_FEATURE_FDISK_ADVANCED
977 puts("Command Action");
979 puts("a\tchange number of alternate cylinders"); /*sun*/
980 puts("c\tchange number of cylinders");
981 puts("d\tprint the raw data in the partition table");
982 puts("e\tchange number of extra sectors per cylinder");/*sun*/
983 puts("h\tchange number of heads");
984 puts("i\tchange interleave factor"); /*sun*/
985 puts("o\tchange rotation speed (rpm)"); /*sun*/
986 puts("p\tprint the partition table");
987 puts("q\tquit without saving changes");
988 puts("r\treturn to main menu");
989 puts("s\tchange number of sectors/track");
990 puts("v\tverify the partition table");
991 puts("w\twrite table to disk and exit");
992 puts("y\tchange number of physical cylinders"); /*sun*/
993 } else if (LABEL_IS_SGI) {
994 puts("b\tmove beginning of data in a partition"); /* !sun */
995 puts("c\tchange number of cylinders");
996 puts("d\tprint the raw data in the partition table");
997 puts("e\tlist extended partitions"); /* !sun */
998 puts("g\tcreate an IRIX (SGI) partition table");/* sgi */
999 puts("h\tchange number of heads");
1000 puts("p\tprint the partition table");
1001 puts("q\tquit without saving changes");
1002 puts("r\treturn to main menu");
1003 puts("s\tchange number of sectors/track");
1004 puts("v\tverify the partition table");
1005 puts("w\twrite table to disk and exit");
1006 } else if (LABEL_IS_AIX) {
1007 puts("b\tmove beginning of data in a partition"); /* !sun */
1008 puts("c\tchange number of cylinders");
1009 puts("d\tprint the raw data in the partition table");
1010 puts("e\tlist extended partitions"); /* !sun */
1011 puts("g\tcreate an IRIX (SGI) partition table");/* sgi */
1012 puts("h\tchange number of heads");
1013 puts("p\tprint the partition table");
1014 puts("q\tquit without saving changes");
1015 puts("r\treturn to main menu");
1016 puts("s\tchange number of sectors/track");
1017 puts("v\tverify the partition table");
1018 puts("w\twrite table to disk and exit");
1020 puts("b\tmove beginning of data in a partition"); /* !sun */
1021 puts("c\tchange number of cylinders");
1022 puts("d\tprint the raw data in the partition table");
1023 puts("e\tlist extended partitions"); /* !sun */
1024 puts("f\tfix partition order"); /* !sun, !aix, !sgi */
1025 #if ENABLE_FEATURE_SGI_LABEL
1026 puts("g\tcreate an IRIX (SGI) partition table");/* sgi */
1028 puts("h\tchange number of heads");
1029 puts("p\tprint the partition table");
1030 puts("q\tquit without saving changes");
1031 puts("r\treturn to main menu");
1032 puts("s\tchange number of sectors/track");
1033 puts("v\tverify the partition table");
1034 puts("w\twrite table to disk and exit");
1037 #endif /* ADVANCED mode */
1039 #if ENABLE_FEATURE_FDISK_WRITABLE
1040 static const char *const *
1044 LABEL_IS_SUN ? sun_sys_types :
1045 LABEL_IS_SGI ? sgi_sys_types :
1049 #define get_sys_types() i386_sys_types
1053 partition_type(unsigned char type)
1056 const char *const *types = get_sys_types();
1058 for (i = 0; types[i]; i++)
1059 if ((unsigned char)types[i][0] == type)
1060 return types[i] + 1;
1066 is_cleared_partition(const struct partition *p)
1068 /* We consider partition "cleared" only if it has only zeros */
1069 const char *cp = (const char *)p;
1070 int cnt = sizeof(*p);
1078 clear_partition(struct partition *p)
1081 memset(p, 0, sizeof(*p));
1084 #if ENABLE_FEATURE_FDISK_WRITABLE
1088 return LABEL_IS_SUN ? sunlabel->infos[i].id :
1089 (LABEL_IS_SGI ? sgi_get_sysid(i) :
1090 ptes[i].part_table->sys_ind);
1094 list_types(const char *const *sys)
1098 unsigned last[COLS];
1099 unsigned done, next, size;
1102 for (size = 0; sys[size]; size++)
1106 for (i = COLS-1; i >= 0; i--) {
1107 done += (size + i - done) / (i + 1);
1108 last[COLS-1 - i] = done;
1111 i = done = next = 0;
1113 printf("%c%2x %-22.22s", i ? ' ' : '\n',
1114 (unsigned char)sys[next][0],
1116 next = last[i++] + done;
1117 if (i >= COLS || next >= last[i]) {
1121 } while (done < last[0]);
1125 #define set_hsc(h, s, c, sector) do \
1127 s = sector % g_sectors + 1; \
1128 sector /= g_sectors; \
1129 h = sector % g_heads; \
1130 sector /= g_heads; \
1131 c = sector & 0xff; \
1132 s |= (sector >> 2) & 0xc0; \
1135 static void set_hsc_start_end(struct partition *p, sector_t start, sector_t stop)
1137 if (dos_compatible_flag && (start / (g_sectors * g_heads) > 1023))
1138 start = g_heads * g_sectors * 1024 - 1;
1139 set_hsc(p->head, p->sector, p->cyl, start);
1141 if (dos_compatible_flag && (stop / (g_sectors * g_heads) > 1023))
1142 stop = g_heads * g_sectors * 1024 - 1;
1143 set_hsc(p->end_head, p->end_sector, p->end_cyl, stop);
1147 set_partition(int i, int doext, sector_t start, sector_t stop, int sysid)
1149 struct partition *p;
1153 p = ptes[i].ext_pointer;
1154 offset = extended_offset;
1156 p = ptes[i].part_table;
1157 offset = ptes[i].offset_from_dev_start;
1161 set_start_sect(p, start - offset);
1162 set_nr_sects(p, stop - start + 1);
1163 set_hsc_start_end(p, start, stop);
1164 ptes[i].changed = 1;
1171 if (g_heads && g_sectors && g_cylinders)
1174 printf("Unknown value(s) for:");
1180 printf(" cylinders");
1181 #if ENABLE_FEATURE_FDISK_WRITABLE
1182 puts(" (settable in the extra functions menu)");
1192 int cyl_units = g_heads * g_sectors;
1194 if (display_in_cyl_units && cyl_units)
1195 units_per_sector = cyl_units;
1197 units_per_sector = 1; /* in sectors */
1200 #if ENABLE_FEATURE_FDISK_WRITABLE
1202 warn_cylinders(void)
1204 if (LABEL_IS_DOS && g_cylinders > 1024 && !nowarn)
1206 "The number of cylinders for this disk is set to %u.\n"
1207 "There is nothing wrong with that, but this is larger than 1024,\n"
1208 "and could in certain setups cause problems with:\n"
1209 "1) software that runs at boot time (e.g., old versions of LILO)\n"
1210 "2) booting and partitioning software from other OSs\n"
1211 " (e.g., DOS FDISK, OS/2 FDISK)\n",
1217 read_extended(int ext)
1221 struct partition *p, *q;
1225 pex->ext_pointer = pex->part_table;
1227 p = pex->part_table;
1228 if (!get_start_sect(p)) {
1229 puts("Bad offset in primary extended partition");
1233 while (IS_EXTENDED(p->sys_ind)) {
1234 struct pte *pe = &ptes[g_partitions];
1236 if (g_partitions >= MAXIMUM_PARTS) {
1237 /* This is not a Linux restriction, but
1238 this program uses arrays of size MAXIMUM_PARTS.
1239 Do not try to 'improve' this test. */
1240 struct pte *pre = &ptes[g_partitions - 1];
1241 #if ENABLE_FEATURE_FDISK_WRITABLE
1242 printf("Warning: deleting partitions after %u\n",
1246 clear_partition(pre->ext_pointer);
1250 read_pte(pe, extended_offset + get_start_sect(p));
1252 if (!extended_offset)
1253 extended_offset = get_start_sect(p);
1255 q = p = pt_offset(pe->sectorbuffer, 0);
1256 for (i = 0; i < 4; i++, p++) if (get_nr_sects(p)) {
1257 if (IS_EXTENDED(p->sys_ind)) {
1258 if (pe->ext_pointer)
1259 printf("Warning: extra link "
1260 "pointer in partition table"
1261 " %u\n", g_partitions + 1);
1263 pe->ext_pointer = p;
1264 } else if (p->sys_ind) {
1266 printf("Warning: ignoring extra "
1267 "data in partition table"
1268 " %u\n", g_partitions + 1);
1274 /* very strange code here... */
1275 if (!pe->part_table) {
1276 if (q != pe->ext_pointer)
1279 pe->part_table = q + 1;
1281 if (!pe->ext_pointer) {
1282 if (q != pe->part_table)
1283 pe->ext_pointer = q;
1285 pe->ext_pointer = q + 1;
1288 p = pe->ext_pointer;
1292 #if ENABLE_FEATURE_FDISK_WRITABLE
1293 /* remove empty links */
1295 for (i = 4; i < g_partitions; i++) {
1296 struct pte *pe = &ptes[i];
1298 if (!get_nr_sects(pe->part_table)
1299 && (g_partitions > 5 || ptes[4].part_table->sys_ind)
1301 printf("Omitting empty partition (%u)\n", i+1);
1302 delete_partition(i);
1303 goto remove; /* numbering changed */
1309 #if ENABLE_FEATURE_FDISK_WRITABLE
1311 create_doslabel(void)
1313 printf(msg_building_new_label, "DOS disklabel");
1315 current_label_type = LABEL_DOS;
1316 #if ENABLE_FEATURE_OSF_LABEL
1317 possibly_osf_label = 0;
1321 memset(&MBRbuffer[510 - 4*16], 0, 4*16);
1322 write_part_table_flag(MBRbuffer);
1323 extended_offset = 0;
1324 set_all_unchanged();
1326 get_boot(CREATE_EMPTY_DOS);
1331 get_sectorsize(void)
1333 if (!user_set_sector_size) {
1335 if (ioctl(dev_fd, BLKSSZGET, &arg) == 0)
1337 if (sector_size != DEFAULT_SECTOR_SIZE)
1338 printf("Note: sector size is %u "
1339 "(not " DEFAULT_SECTOR_SIZE_STR ")\n",
1345 get_kernel_geometry(void)
1347 struct hd_geometry geometry;
1349 if (!ioctl(dev_fd, HDIO_GETGEO, &geometry)) {
1350 kern_heads = geometry.heads;
1351 kern_sectors = geometry.sectors;
1352 /* never use geometry.cylinders - it is truncated */
1357 get_partition_table_geometry(void)
1359 const unsigned char *bufp = (const unsigned char *)MBRbuffer;
1360 struct partition *p;
1361 int i, h, s, hh, ss;
1365 if (!(valid_part_table_flag((char*)bufp)))
1369 for (i = 0; i < 4; i++) {
1370 p = pt_offset(bufp, i);
1371 if (p->sys_ind != 0) {
1372 h = p->end_head + 1;
1373 s = (p->end_sector & 077);
1378 } else if (hh != h || ss != s)
1383 if (!first && !bad) {
1395 sec_fac = sector_size / 512;
1396 #if ENABLE_FEATURE_SUN_LABEL
1397 guess_device_type();
1399 g_heads = g_cylinders = g_sectors = 0;
1400 kern_heads = kern_sectors = 0;
1401 pt_heads = pt_sectors = 0;
1403 get_kernel_geometry();
1404 get_partition_table_geometry();
1406 g_heads = user_heads ? user_heads :
1407 pt_heads ? pt_heads :
1408 kern_heads ? kern_heads : 255;
1409 g_sectors = user_sectors ? user_sectors :
1410 pt_sectors ? pt_sectors :
1411 kern_sectors ? kern_sectors : 63;
1412 total_number_of_sectors = bb_BLKGETSIZE_sectors(dev_fd);
1415 if (dos_compatible_flag)
1416 sector_offset = g_sectors;
1418 g_cylinders = total_number_of_sectors / (g_heads * g_sectors * sec_fac);
1420 g_cylinders = user_cylinders;
1424 * Opens disk_device and optionally reads MBR.
1425 * If what == OPEN_MAIN:
1426 * Open device, read MBR. Abort program on short read. Create empty
1427 * disklabel if the on-disk structure is invalid (WRITABLE mode).
1428 * If what == TRY_ONLY:
1429 * Open device, read MBR. Return an error if anything is out of place.
1430 * Do not create an empty disklabel. This is used for the "list"
1431 * operations: "fdisk -l /dev/sda" and "fdisk -l" (all devices).
1432 * If what == CREATE_EMPTY_*:
1433 * This means that get_boot() was called recursively from create_*label().
1434 * Do not re-open the device; just set up the ptes array and print
1435 * geometry warnings.
1438 * -1: no 0xaa55 flag present (possibly entire disk BSD)
1439 * 0: found or created label
1442 #if ENABLE_FEATURE_SUN_LABEL || ENABLE_FEATURE_FDISK_WRITABLE
1443 static int get_boot(enum action what)
1445 static int get_boot(void)
1446 #define get_boot(what) get_boot()
1452 for (i = 0; i < 4; i++) {
1453 struct pte *pe = &ptes[i];
1454 pe->part_table = pt_offset(MBRbuffer, i);
1455 pe->ext_pointer = NULL;
1456 pe->offset_from_dev_start = 0;
1457 pe->sectorbuffer = MBRbuffer;
1458 #if ENABLE_FEATURE_FDISK_WRITABLE
1459 pe->changed = (what == CREATE_EMPTY_DOS);
1463 #if ENABLE_FEATURE_FDISK_WRITABLE
1464 // ALERT! highly idiotic design!
1465 // We end up here when we call get_boot() recursively
1466 // via get_boot() [table is bad] -> create_doslabel() -> get_boot(CREATE_EMPTY_DOS).
1467 // or get_boot() [table is bad] -> create_sunlabel() -> get_boot(CREATE_EMPTY_SUN).
1468 // (just factor out re-init of ptes[0,1,2,3] in a separate fn instead?)
1469 // So skip opening device _again_...
1470 if (what == CREATE_EMPTY_DOS IF_FEATURE_SUN_LABEL(|| what == CREATE_EMPTY_SUN))
1473 fd = open(disk_device, (option_mask32 & OPT_l) ? O_RDONLY : O_RDWR);
1476 fd = open(disk_device, O_RDONLY);
1478 if (what == TRY_ONLY)
1480 fdisk_fatal(unable_to_open);
1482 printf("'%s' is opened for read only\n", disk_device);
1484 xmove_fd(fd, dev_fd);
1485 if (512 != full_read(dev_fd, MBRbuffer, 512)) {
1486 if (what == TRY_ONLY) {
1490 fdisk_fatal(unable_to_read);
1493 fd = open(disk_device, O_RDONLY);
1496 if (512 != full_read(fd, MBRbuffer, 512)) {
1500 xmove_fd(fd, dev_fd);
1506 #if ENABLE_FEATURE_SUN_LABEL
1507 if (check_sun_label())
1510 #if ENABLE_FEATURE_SGI_LABEL
1511 if (check_sgi_label())
1514 #if ENABLE_FEATURE_AIX_LABEL
1515 if (check_aix_label())
1518 #if ENABLE_FEATURE_GPT_LABEL
1519 if (check_gpt_label())
1522 #if ENABLE_FEATURE_OSF_LABEL
1523 if (check_osf_label()) {
1524 possibly_osf_label = 1;
1525 if (!valid_part_table_flag(MBRbuffer)) {
1526 current_label_type = LABEL_OSF;
1529 puts("This disk has both DOS and BSD magic.\n"
1530 "Give the 'b' command to go to BSD mode.");
1534 #if !ENABLE_FEATURE_FDISK_WRITABLE
1535 if (!valid_part_table_flag(MBRbuffer))
1538 if (!valid_part_table_flag(MBRbuffer)) {
1539 if (what == OPEN_MAIN) {
1540 puts("Device contains neither a valid DOS "
1541 "partition table, nor Sun, SGI, OSF or GPT "
1544 IF_FEATURE_SUN_LABEL(create_sunlabel();)
1554 #endif /* FEATURE_FDISK_WRITABLE */
1557 IF_FEATURE_FDISK_WRITABLE(warn_cylinders();)
1560 for (i = 0; i < 4; i++) {
1561 if (IS_EXTENDED(ptes[i].part_table->sys_ind)) {
1562 if (g_partitions != 4)
1563 printf("Ignoring extra extended "
1564 "partition %u\n", i + 1);
1570 for (i = 3; i < g_partitions; i++) {
1571 struct pte *pe = &ptes[i];
1572 if (!valid_part_table_flag(pe->sectorbuffer)) {
1573 printf("Warning: invalid flag 0x%02x,0x%02x of partition "
1574 "table %u will be corrected by w(rite)\n",
1575 pe->sectorbuffer[510],
1576 pe->sectorbuffer[511],
1578 IF_FEATURE_FDISK_WRITABLE(pe->changed = 1;)
1585 #if ENABLE_FEATURE_FDISK_WRITABLE
1587 * Print the message MESG, then read an integer between LOW and HIGH (inclusive).
1588 * If the user hits Enter, DFLT is returned.
1589 * Answers like +10 are interpreted as offsets from BASE.
1591 * There is no default if DFLT is not between LOW and HIGH.
1594 read_int(sector_t low, sector_t dflt, sector_t high, sector_t base, const char *mesg)
1598 const char *fmt = "%s (%u-%u, default %u): ";
1600 if (dflt < low || dflt > high) {
1601 fmt = "%s (%u-%u): ";
1606 int use_default = default_ok;
1608 /* ask question and read answer */
1610 printf(fmt, mesg, low, high, dflt);
1611 read_maybe_empty("");
1612 } while (*line_ptr != '\n' && !isdigit(*line_ptr)
1613 && *line_ptr != '-' && *line_ptr != '+');
1615 if (*line_ptr == '+' || *line_ptr == '-') {
1616 int minus = (*line_ptr == '-');
1619 value = atoi(line_ptr + 1);
1621 /* (1) if 2nd char is digit, use_default = 0.
1622 * (2) move line_ptr to first non-digit. */
1623 while (isdigit(*++line_ptr))
1626 switch (*line_ptr) {
1629 if (!display_in_cyl_units)
1630 value *= g_heads * g_sectors;
1644 absolute = 1000000000;
1653 bytes = (ullong) value * absolute;
1654 unit = sector_size * units_per_sector;
1655 bytes += unit/2; /* round */
1663 value = atoi(line_ptr);
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);
2008 /* Ending on cylinder boundary? */
2009 if (peh != (g_heads - 1) || pes != g_sectors) {
2010 printf("Partition %u does not end on cylinder boundary\n",
2016 list_disk_geometry(void)
2018 ullong bytes = ((ullong)total_number_of_sectors << 9);
2019 ullong xbytes = bytes / (1024*1024);
2022 if (xbytes >= 10000) {
2023 xbytes += 512; /* fdisk util-linux 2.28 does this */
2027 printf("Disk %s: %llu %cB, %llu bytes, %"SECT_FMT"u sectors\n"
2028 "%u cylinders, %u heads, %u sectors/track\n"
2029 "Units: %s of %u * %u = %u bytes\n\n",
2030 disk_device, xbytes, x,
2031 bytes, total_number_of_sectors,
2032 g_cylinders, g_heads, g_sectors,
2034 units_per_sector, sector_size, units_per_sector * sector_size
2039 * Check whether partition entries are ordered by their starting positions.
2040 * Return 0 if OK. Return i if partition i should have been earlier.
2041 * Two separate checks: primary and logical partitions.
2044 wrong_p_order(int *prev)
2046 const struct pte *pe;
2047 const struct partition *p;
2048 sector_t last_p_start_pos = 0, p_start_pos;
2049 unsigned i, last_i = 0;
2051 for (i = 0; i < g_partitions; i++) {
2054 last_p_start_pos = 0;
2059 p_start_pos = get_partition_start_from_dev_start(pe);
2061 if (last_p_start_pos > p_start_pos) {
2067 last_p_start_pos = p_start_pos;
2074 #if ENABLE_FEATURE_FDISK_ADVANCED
2076 * Fix the chain of logicals.
2077 * extended_offset is unchanged, the set of sectors used is unchanged
2078 * The chain is sorted so that sectors increase, and so that
2079 * starting sectors increase.
2081 * After this it may still be that cfdisk doesnt like the table.
2082 * (This is because cfdisk considers expanded parts, from link to
2083 * end of partition, and these may still overlap.)
2085 * sfdisk /dev/hda > ohda; sfdisk /dev/hda < ohda
2089 fix_chain_of_logicals(void)
2091 int j, oj, ojj, sj, sjj;
2092 struct partition *pj,*pjj,tmp;
2094 /* Stage 1: sort sectors but leave sector of part 4 */
2095 /* (Its sector is the global extended_offset.) */
2097 for (j = 5; j < g_partitions - 1; j++) {
2098 oj = ptes[j].offset_from_dev_start;
2099 ojj = ptes[j+1].offset_from_dev_start;
2101 ptes[j].offset_from_dev_start = ojj;
2102 ptes[j+1].offset_from_dev_start = oj;
2103 pj = ptes[j].part_table;
2104 set_start_sect(pj, get_start_sect(pj)+oj-ojj);
2105 pjj = ptes[j+1].part_table;
2106 set_start_sect(pjj, get_start_sect(pjj)+ojj-oj);
2107 set_start_sect(ptes[j-1].ext_pointer,
2108 ojj-extended_offset);
2109 set_start_sect(ptes[j].ext_pointer,
2110 oj-extended_offset);
2115 /* Stage 2: sort starting sectors */
2117 for (j = 4; j < g_partitions - 1; j++) {
2118 pj = ptes[j].part_table;
2119 pjj = ptes[j+1].part_table;
2120 sj = get_start_sect(pj);
2121 sjj = get_start_sect(pjj);
2122 oj = ptes[j].offset_from_dev_start;
2123 ojj = ptes[j+1].offset_from_dev_start;
2124 if (oj+sj > ojj+sjj) {
2128 set_start_sect(pj, ojj+sjj-oj);
2129 set_start_sect(pjj, oj+sj-ojj);
2134 /* Probably something was changed */
2135 for (j = 4; j < g_partitions; j++)
2136 ptes[j].changed = 1;
2141 fix_partition_table_order(void)
2143 struct pte *pei, *pek;
2146 if (!wrong_p_order(NULL)) {
2147 puts("Ordering is already correct\n");
2151 while ((i = wrong_p_order(&k)) != 0 && i < 4) {
2152 /* partition i should have come earlier, move it */
2153 /* We have to move data in the MBR */
2154 struct partition *pi, *pk, *pe, pbuf;
2158 pe = pei->ext_pointer;
2159 pei->ext_pointer = pek->ext_pointer;
2160 pek->ext_pointer = pe;
2162 pi = pei->part_table;
2163 pk = pek->part_table;
2165 memmove(&pbuf, pi, sizeof(struct partition));
2166 memmove(pi, pk, sizeof(struct partition));
2167 memmove(pk, &pbuf, sizeof(struct partition));
2169 pei->changed = pek->changed = 1;
2173 fix_chain_of_logicals();
2180 chs_string11(unsigned cyl, unsigned head, unsigned sect)
2182 char *buf = auto_string(xzalloc(sizeof(int)*3 * 3));
2183 sprintf(buf, "%u,%u,%u", cylinder(sect,cyl), head, sector(sect));
2188 list_table(int xtra)
2193 sun_list_table(xtra);
2197 sgi_list_table(xtra);
2201 gpt_list_table(xtra);
2205 list_disk_geometry();
2208 xbsd_print_disklabel(xtra);
2212 /* Heuristic: we list partition 3 of /dev/foo as /dev/foo3,
2213 * but if the device name ends in a digit, say /dev/foo1,
2214 * then the partition is called /dev/foo1p3.
2216 w = strlen(disk_device);
2217 if (w && isdigit(disk_device[w-1]))
2222 printf("%-*s Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type\n",
2225 for (i = 0; i < g_partitions; i++) {
2226 const struct partition *p;
2227 const struct pte *pe = &ptes[i];
2230 sector_t start_sect;
2235 if (!p || is_cleared_partition(p))
2238 sprintf(boot4, "%02x", p->boot_ind);
2239 if ((p->boot_ind & 0x7f) == 0) {
2240 /* 0x80 shown as '*', 0x00 is ' ' */
2241 boot4[0] = p->boot_ind ? '*' : ' ';
2245 start_sect = get_partition_start_from_dev_start(pe);
2246 end_sect = start_sect;
2247 nr_sects = get_nr_sects(p);
2249 end_sect += nr_sects - 1;
2251 smart_ulltoa5((ullong)nr_sects * sector_size,
2252 numstr6, " KMGTPEZY")[0] = '\0';
2254 #define SFMT SECT_FMT
2255 // Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type
2256 printf("%s%s %-11s"/**/" %-11s"/**/" %10"SFMT"u %10"SFMT"u %10"SFMT"u %s %2x %s\n",
2257 partname(disk_device, i+1, w+2),
2259 chs_string11(p->cyl, p->head, p->sector),
2260 chs_string11(p->end_cyl, p->end_head, p->end_sector),
2266 partition_type(p->sys_ind)
2269 check_consistency(p, i);
2272 /* Is partition table in disk order? It need not be, but... */
2273 /* partition table entries are not checked for correct order
2274 * if this is a sgi, sun or aix labeled disk... */
2275 if (LABEL_IS_DOS && wrong_p_order(NULL)) {
2277 puts("\nPartition table entries are not in disk order");
2281 #if ENABLE_FEATURE_FDISK_ADVANCED
2283 x_list_table(int extend)
2285 const struct pte *pe;
2286 const struct partition *p;
2289 printf("\nDisk %s: %u heads, %u sectors, %u cylinders\n\n",
2290 disk_device, g_heads, g_sectors, g_cylinders);
2291 puts("Nr AF Hd Sec Cyl Hd Sec Cyl Start Size ID");
2292 for (i = 0; i < g_partitions; i++) {
2294 p = (extend ? pe->ext_pointer : pe->part_table);
2296 printf("%2u %02x%4u%4u%5u%4u%4u%5u%11"SECT_FMT"u%11"SECT_FMT"u %02x\n",
2300 cylinder(p->sector, p->cyl),
2302 sector(p->end_sector),
2303 cylinder(p->end_sector, p->end_cyl),
2309 check_consistency(p, i);
2315 #if ENABLE_FEATURE_FDISK_WRITABLE
2317 fill_bounds(sector_t *first, sector_t *last)
2320 const struct pte *pe = &ptes[0];
2321 const struct partition *p;
2323 for (i = 0; i < g_partitions; pe++,i++) {
2325 if (!p->sys_ind || IS_EXTENDED(p->sys_ind)) {
2326 first[i] = 0xffffffff;
2329 first[i] = get_partition_start_from_dev_start(pe);
2330 last[i] = first[i] + get_nr_sects(p) - 1;
2336 check(int n, unsigned h, unsigned s, unsigned c, sector_t start)
2338 sector_t total, real_s, real_c;
2340 real_s = sector(s) - 1;
2341 real_c = cylinder(s, c);
2342 total = (real_c * g_sectors + real_s) * g_heads + h;
2344 printf("Partition %u contains sector 0\n", n);
2346 printf("Partition %u: head %u greater than maximum %u\n",
2348 if (real_s >= g_sectors)
2349 printf("Partition %u: sector %u greater than "
2350 "maximum %u\n", n, s, g_sectors);
2351 if (real_c >= g_cylinders)
2352 printf("Partition %u: cylinder %"SECT_FMT"u greater than "
2353 "maximum %u\n", n, real_c + 1, g_cylinders);
2354 if (g_cylinders <= 1024 && start != total)
2355 printf("Partition %u: previous sectors %"SECT_FMT"u disagrees with "
2356 "total %"SECT_FMT"u\n", n, start, total);
2365 sector_t first[g_partitions], last[g_partitions];
2366 struct partition *p;
2368 if (warn_geometry())
2380 fill_bounds(first, last);
2381 for (i = 0; i < g_partitions; i++) {
2382 struct pte *pe = &ptes[i];
2385 if (p->sys_ind && !IS_EXTENDED(p->sys_ind)) {
2386 check_consistency(p, i);
2387 if (get_partition_start_from_dev_start(pe) < first[i])
2388 printf("Warning: bad start-of-data in "
2389 "partition %u\n", i + 1);
2390 check(i + 1, p->end_head, p->end_sector, p->end_cyl,
2392 total += last[i] + 1 - first[i];
2393 for (j = 0; j < i; j++) {
2394 if ((first[i] >= first[j] && first[i] <= last[j])
2395 || ((last[i] <= last[j] && last[i] >= first[j]))) {
2396 printf("Warning: partition %u overlaps "
2397 "partition %u\n", j + 1, i + 1);
2398 total += first[i] >= first[j] ?
2399 first[i] : first[j];
2400 total -= last[i] <= last[j] ?
2407 if (extended_offset) {
2408 struct pte *pex = &ptes[ext_index];
2409 sector_t e_last = get_start_sect(pex->part_table) +
2410 get_nr_sects(pex->part_table) - 1;
2412 for (i = 4; i < g_partitions; i++) {
2414 p = ptes[i].part_table;
2416 if (i != 4 || i + 1 < g_partitions)
2417 printf("Warning: partition %u "
2418 "is empty\n", i + 1);
2419 } else if (first[i] < extended_offset || last[i] > e_last) {
2420 printf("Logical partition %u not entirely in "
2421 "partition %u\n", i + 1, ext_index + 1);
2426 chs_size = (sector_t)g_heads * g_sectors * g_cylinders;
2427 if (total > chs_size)
2428 printf("Total allocated sectors %u"
2429 " greater than CHS size %"SECT_FMT"u\n",
2433 total = chs_size - total;
2435 printf("%"SECT_FMT"u unallocated sectors\n", total);
2440 add_partition(int n, int sys)
2442 char mesg[256]; /* 48 does not suffice in Japanese */
2443 int i, num_read = 0;
2444 struct partition *p = ptes[n].part_table;
2445 struct partition *q = ptes[ext_index].part_table;
2446 sector_t limit, temp;
2447 sector_t start, stop = 0;
2448 sector_t first[g_partitions], last[g_partitions];
2450 if (p && p->sys_ind) {
2451 printf(msg_part_already_defined, n + 1);
2454 fill_bounds(first, last);
2456 start = sector_offset;
2457 if (display_in_cyl_units || !total_number_of_sectors)
2458 limit = (sector_t) g_heads * g_sectors * g_cylinders - 1;
2460 limit = total_number_of_sectors - 1;
2461 if (extended_offset) {
2462 first[ext_index] = extended_offset;
2463 last[ext_index] = get_start_sect(q) +
2464 get_nr_sects(q) - 1;
2467 start = extended_offset + sector_offset;
2468 limit = get_start_sect(q) + get_nr_sects(q) - 1;
2470 if (display_in_cyl_units)
2471 for (i = 0; i < g_partitions; i++)
2472 first[i] = (cround(first[i]) - 1) * units_per_sector;
2474 snprintf(mesg, sizeof(mesg), "First %s", str_units(SINGULAR));
2477 for (i = 0; i < g_partitions; i++) {
2480 if (start == ptes[i].offset_from_dev_start)
2481 start += sector_offset;
2482 lastplusoff = last[i] + ((n < 4) ? 0 : sector_offset);
2483 if (start >= first[i] && start <= lastplusoff)
2484 start = lastplusoff + 1;
2488 if (start >= temp+units_per_sector && num_read) {
2489 printf("Sector %"SECT_FMT"u is already allocated\n", temp);
2493 if (!num_read && start == temp) {
2494 sector_t saved_start;
2496 saved_start = start;
2497 start = read_int(cround(saved_start), cround(saved_start), cround(limit), 0, mesg);
2498 if (display_in_cyl_units) {
2499 start = (start - 1) * units_per_sector;
2500 if (start < saved_start)
2501 start = saved_start;
2505 } while (start != temp || !num_read);
2506 if (n > 4) { /* NOT for fifth partition */
2507 struct pte *pe = &ptes[n];
2509 pe->offset_from_dev_start = start - sector_offset;
2510 if (pe->offset_from_dev_start == extended_offset) { /* must be corrected */
2511 pe->offset_from_dev_start++;
2512 if (sector_offset == 1)
2517 for (i = 0; i < g_partitions; i++) {
2518 struct pte *pe = &ptes[i];
2520 if (start < pe->offset_from_dev_start && limit >= pe->offset_from_dev_start)
2521 limit = pe->offset_from_dev_start - 1;
2522 if (start < first[i] && limit >= first[i])
2523 limit = first[i] - 1;
2525 if (start > limit) {
2526 puts("No free sectors available");
2531 if (cround(start) == cround(limit)) {
2534 snprintf(mesg, sizeof(mesg),
2535 "Last %s or +size or +sizeM or +sizeK",
2536 str_units(SINGULAR));
2537 stop = read_int(cround(start), cround(limit), cround(limit), cround(start), mesg);
2538 if (display_in_cyl_units) {
2539 stop = stop * units_per_sector - 1;
2545 set_partition(n, 0, start, stop, sys);
2547 set_partition(n - 1, 1, ptes[n].offset_from_dev_start, stop, EXTENDED);
2549 if (IS_EXTENDED(sys)) {
2550 struct pte *pe4 = &ptes[4];
2551 struct pte *pen = &ptes[n];
2554 pen->ext_pointer = p;
2555 pe4->offset_from_dev_start = extended_offset = start;
2556 pe4->sectorbuffer = xzalloc(sector_size);
2557 pe4->part_table = pt_offset(pe4->sectorbuffer, 0);
2558 pe4->ext_pointer = pe4->part_table + 1;
2567 if (g_partitions > 5 || ptes[4].part_table->sys_ind) {
2568 struct pte *pe = &ptes[g_partitions];
2570 pe->sectorbuffer = xzalloc(sector_size);
2571 pe->part_table = pt_offset(pe->sectorbuffer, 0);
2572 pe->ext_pointer = pe->part_table + 1;
2573 pe->offset_from_dev_start = 0;
2577 add_partition(g_partitions - 1, LINUX_NATIVE);
2583 int i, free_primary = 0;
2585 if (warn_geometry())
2589 add_sun_partition(get_partition(0, g_partitions), LINUX_NATIVE);
2593 sgi_add_partition(get_partition(0, g_partitions), LINUX_NATIVE);
2597 puts("Sorry - this fdisk cannot handle AIX disk labels.\n"
2598 "If you want to add DOS-type partitions, create a new empty DOS partition\n"
2599 "table first (use 'o'). This will destroy the present disk contents.");
2603 for (i = 0; i < 4; i++)
2604 free_primary += !ptes[i].part_table->sys_ind;
2606 if (!free_primary && g_partitions >= MAXIMUM_PARTS) {
2607 puts("The maximum number of partitions has been created");
2611 if (!free_primary) {
2612 if (extended_offset)
2615 puts("You must delete some partition and add "
2616 "an extended partition first");
2619 snprintf(line, sizeof(line),
2622 " p primary partition (1-4)\n",
2624 "l logical (5 or over)" : "e extended"));
2626 c = read_nonempty(line);
2627 if ((c | 0x20) == 'p') {
2628 i = get_nonexisting_partition(0, 4);
2630 add_partition(i, LINUX_NATIVE);
2633 if (c == 'l' && extended_offset) {
2637 if (c == 'e' && !extended_offset) {
2638 i = get_nonexisting_partition(0, 4);
2640 add_partition(i, EXTENDED);
2643 printf("Invalid partition number "
2644 "for type '%c'\n", c);
2650 reread_partition_table(int leave)
2654 puts("Calling ioctl() to re-read partition table");
2656 /* Users with slow external USB disks on a 320MHz ARM system (year 2011)
2657 * report that sleep is needed, otherwise BLKRRPART may fail with -EIO:
2660 i = ioctl_or_perror(dev_fd, BLKRRPART, NULL,
2661 "WARNING: rereading partition table "
2662 "failed, kernel still uses old table");
2666 "\nWARNING: If you have created or modified any DOS 6.x\n"
2667 "partitions, please see the fdisk manual page for additional\n"
2672 if (ENABLE_FEATURE_CLEAN_UP)
2684 for (i = 0; i < 3; i++)
2685 if (ptes[i].changed)
2686 ptes[3].changed = 1;
2687 for (i = 3; i < g_partitions; i++) {
2688 struct pte *pe = &ptes[i];
2690 write_part_table_flag(pe->sectorbuffer);
2691 write_sector(pe->offset_from_dev_start, pe->sectorbuffer);
2695 else if (LABEL_IS_SGI) {
2696 /* no test on change? the "altered" msg below might be mistaken */
2699 else if (LABEL_IS_SUN) {
2700 for (i = 0; i < 8; i++) {
2701 if (ptes[i].changed) {
2708 puts("The partition table has been altered.");
2709 reread_partition_table(1);
2711 #endif /* FEATURE_FDISK_WRITABLE */
2713 #if ENABLE_FEATURE_FDISK_ADVANCED
2714 #define MAX_PER_LINE 16
2716 print_buffer(char *pbuffer)
2720 for (i = 0, l = 0; i < sector_size; i++, l++) {
2722 printf("0x%03X:", i);
2723 printf(" %02X", (unsigned char) pbuffer[i]);
2724 if (l == MAX_PER_LINE - 1) {
2739 printf("Device: %s\n", disk_device);
2740 if (LABEL_IS_SGI || LABEL_IS_SUN)
2741 print_buffer(MBRbuffer);
2743 for (i = 3; i < g_partitions; i++)
2744 print_buffer(ptes[i].sectorbuffer);
2749 move_begin(unsigned i)
2751 struct pte *pe = &ptes[i];
2752 struct partition *p = pe->part_table;
2753 sector_t new, first, nr_sects;
2755 if (warn_geometry())
2757 nr_sects = get_nr_sects(p);
2758 if (!p->sys_ind || !nr_sects || IS_EXTENDED(p->sys_ind)) {
2759 printf("Partition %u has no data area\n", i + 1);
2762 first = get_partition_start_from_dev_start(pe); /* == pe->offset_from_dev_start + get_start_sect(p) */
2763 new = read_int(0 /*was:first*/, first, first + nr_sects - 1, first, "New beginning of data");
2765 sector_t new_relative = new - pe->offset_from_dev_start;
2766 nr_sects += (get_start_sect(p) - new_relative);
2767 set_start_sect(p, new_relative);
2768 set_nr_sects(p, nr_sects);
2769 read_nonempty("Recalculate C/H/S values? (Y/N): ");
2770 if ((line_ptr[0] | 0x20) == 'y')
2771 set_hsc_start_end(p, new, new + nr_sects - 1);
2783 c = 0x20 | read_nonempty("Expert command (m for help): ");
2791 move_begin(get_partition(0, g_partitions));
2794 user_cylinders = g_cylinders =
2795 read_int(1, g_cylinders, 1048576, 0,
2796 "Number of cylinders");
2798 sun_set_ncyl(g_cylinders);
2808 else if (LABEL_IS_SUN)
2810 else if (LABEL_IS_DOS)
2815 fix_partition_table_order();
2818 #if ENABLE_FEATURE_SGI_LABEL
2823 user_heads = g_heads = read_int(1, g_heads, 256, 0, "Number of heads");
2841 if (ENABLE_FEATURE_CLEAN_UP)
2848 user_sectors = g_sectors = read_int(1, g_sectors, 63, 0, "Number of sectors");
2849 if (dos_compatible_flag) {
2850 sector_offset = g_sectors;
2851 puts("Warning: setting sector offset for DOS "
2860 write_table(); /* does not return */
2864 sun_set_pcylcount();
2871 #endif /* ADVANCED mode */
2874 is_ide_cdrom_or_tape(const char *device)
2878 struct stat statbuf;
2881 /* No device was given explicitly, and we are trying some
2882 likely things. But opening /dev/hdc may produce errors like
2883 "hdc: tray open or drive not ready"
2884 if it happens to be a CD-ROM drive. It even happens that
2885 the process hangs on the attempt to read a music CD.
2886 So try to be careful. This only works since 2.1.73. */
2888 if (!is_prefixed_with(device, "/dev/hd"))
2891 snprintf(buf, sizeof(buf), "/proc/ide/%s/media", device+5);
2892 procf = fopen_for_read(buf);
2893 if (procf != NULL && fgets(buf, sizeof(buf), procf))
2894 is_ide = (is_prefixed_with(buf, "cdrom") ||
2895 is_prefixed_with(buf, "tape"));
2897 /* Now when this proc file does not exist, skip the
2898 device when it is read-only. */
2899 if (stat(device, &statbuf) == 0)
2900 is_ide = ((statbuf.st_mode & 0222) == 0);
2909 open_list_and_close(const char *device, int user_specified)
2913 disk_device = device;
2914 if (setjmp(listingbuf))
2916 if (!user_specified)
2917 if (is_ide_cdrom_or_tape(device))
2920 /* Open disk_device, save file descriptor to dev_fd */
2922 gb = get_boot(TRY_ONLY);
2923 if (gb > 0) { /* I/O error */
2924 /* Ignore other errors, since we try IDE
2925 and SCSI hard disks which may not be
2926 installed on the system. */
2927 if (user_specified || errno == EACCES)
2928 bb_perror_msg("can't open '%s'", device);
2932 if (gb < 0) { /* no DOS signature */
2933 list_disk_geometry();
2936 #if ENABLE_FEATURE_OSF_LABEL
2937 if (bsd_trydev(device) < 0)
2939 printf("Disk %s doesn't contain a valid "
2940 "partition table\n", device);
2943 #if ENABLE_FEATURE_FDISK_WRITABLE
2944 if (!LABEL_IS_SUN && g_partitions > 4) {
2945 delete_partition(ext_index);
2953 /* Is it a whole disk? The digit check is still useful
2954 for Xen devices for example. */
2955 static int is_whole_disk(const char *disk)
2958 int fd = open(disk, O_RDONLY);
2961 struct hd_geometry geometry;
2962 int err = ioctl(fd, HDIO_GETGEO, &geometry);
2965 return (geometry.start == 0);
2968 /* Treat "nameN" as a partition name, not whole disk */
2969 /* note: mmcblk0 should work from the geometry check above */
2971 if (len != 0 && isdigit(disk[len - 1]))
2977 /* for fdisk -l: try all things in /proc/partitions
2978 that look like a partition name (do not end in a digit) */
2980 list_devs_in_proc_partititons(void)
2983 char line[100], ptname[100], devname[120];
2986 procpt = fopen_or_warn("/proc/partitions", "r");
2988 while (fgets(line, sizeof(line), procpt)) {
2989 if (sscanf(line, " %u %u %u %[^\n ]",
2990 &ma, &mi, &sz, ptname) != 4)
2993 sprintf(devname, "/dev/%s", ptname);
2994 if (is_whole_disk(devname))
2995 open_list_and_close(devname, 0);
2997 #if ENABLE_FEATURE_CLEAN_UP
3002 #if ENABLE_FEATURE_FDISK_WRITABLE
3004 unknown_command(int c)
3006 printf("%c: unknown command\n", c);
3010 int fdisk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
3011 int fdisk_main(int argc UNUSED_PARAM, char **argv)
3016 * fdisk -l [-b sectorsize] [-u] device ...
3017 * fdisk -s [partition] ...
3018 * fdisk [-b sectorsize] [-u] device
3020 * Options -C, -H, -S set the geometry.
3024 close_dev_fd(); /* needed: fd 3 must not stay closed */
3026 opt = getopt32(argv, "b:+C:+H:+lS:+u" IF_FEATURE_FDISK_BLKSIZE("s"),
3027 §or_size, &user_cylinders, &user_heads, &user_sectors);
3030 /* Ugly: this sector size is really per device,
3031 * so cannot be combined with multiple disks,
3032 * and the same goes for the C/H/S options.
3034 if (sector_size < 512
3035 || sector_size > 0x10000
3036 || (sector_size & (sector_size-1)) /* not power of 2 */
3041 user_set_sector_size = 1;
3043 if (user_heads <= 0 || user_heads >= 256)
3045 if (user_sectors <= 0 || user_sectors >= 64)
3048 display_in_cyl_units = 0; // -u
3050 #if ENABLE_FEATURE_FDISK_WRITABLE
3057 open_list_and_close(*argv, 1);
3060 /* we don't have device names, */
3061 /* use /proc/partitions instead */
3062 list_devs_in_proc_partititons();
3065 #if ENABLE_FEATURE_FDISK_WRITABLE
3069 #if ENABLE_FEATURE_FDISK_BLKSIZE
3076 for (j = 0; argv[j]; j++) {
3077 unsigned long long size;
3078 fd = xopen(argv[j], O_RDONLY);
3079 size = bb_BLKGETSIZE_sectors(fd) / 2;
3082 printf("%llu\n", size);
3084 printf("%s: %llu\n", argv[j], size);
3090 #if ENABLE_FEATURE_FDISK_WRITABLE
3091 if (!argv[0] || argv[1])
3094 disk_device = argv[0];
3095 get_boot(OPEN_MAIN);
3098 /* OSF label, and no DOS label */
3099 printf("Detected an OSF/1 disklabel on %s, entering "
3100 "disklabel mode\n", disk_device);
3102 /*Why do we do this? It seems to be counter-intuitive*/
3103 current_label_type = LABEL_DOS;
3104 /* If we return we may want to make an empty DOS label? */
3110 c = 0x20 | read_nonempty("Command (m for help): ");
3114 toggle_active(get_partition(1, g_partitions));
3115 else if (LABEL_IS_SUN)
3116 toggle_sunflags(get_partition(1, g_partitions),
3118 else if (LABEL_IS_SGI)
3119 sgi_set_bootpartition(
3120 get_partition(1, g_partitions));
3126 printf("\nThe current boot file is: %s\n",
3127 sgi_get_bootfile());
3128 if (read_maybe_empty("Please enter the name of the "
3129 "new boot file: ") == '\n')
3130 puts("Boot file unchanged");
3132 sgi_set_bootfile(line_ptr);
3134 #if ENABLE_FEATURE_OSF_LABEL
3141 toggle_dos_compatibility_flag();
3142 else if (LABEL_IS_SUN)
3143 toggle_sunflags(get_partition(1, g_partitions),
3145 else if (LABEL_IS_SGI)
3146 sgi_set_swappartition(
3147 get_partition(1, g_partitions));
3154 /* If sgi_label then don't use get_existing_partition,
3155 let the user select a partition, since
3156 get_existing_partition() only works for Linux-like
3158 if (!LABEL_IS_SGI) {
3159 j = get_existing_partition(1, g_partitions);
3161 j = get_partition(1, g_partitions);
3164 delete_partition(j);
3173 list_types(get_sys_types());
3188 if (ENABLE_FEATURE_CLEAN_UP)
3193 #if ENABLE_FEATURE_SUN_LABEL
3207 write_table(); /* does not return */
3209 #if ENABLE_FEATURE_FDISK_ADVANCED
3212 puts("\n\tSorry, no experts menu for SGI "
3213 "partition tables available\n");
3224 #endif /* FEATURE_FDISK_WRITABLE */