/* vi: set sw=4 ts=4: */ /* fdisk.c -- Partition table manipulator for Linux. * * Copyright (C) 1992 A. V. Le Blanc (LeBlanc@mcc.ac.uk) * Copyright (C) 2001,2002 Vladimir Oleynik (initial bb port) * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ /* Looks like someone forgot to add this to config system */ //usage:#ifndef ENABLE_FEATURE_FDISK_BLKSIZE //usage:# define ENABLE_FEATURE_FDISK_BLKSIZE 0 //usage:# define IF_FEATURE_FDISK_BLKSIZE(a) //usage:#endif //usage: //usage:#define fdisk_trivial_usage //usage: "[-ul" IF_FEATURE_FDISK_BLKSIZE("s") "] " //usage: "[-C CYLINDERS] [-H HEADS] [-S SECTORS] [-b SSZ] DISK" //usage:#define fdisk_full_usage "\n\n" //usage: "Change partition table\n" //usage: "\n -u Start and End are in sectors (instead of cylinders)" //usage: "\n -l Show partition table for each DISK, then exit" //usage: IF_FEATURE_FDISK_BLKSIZE( //usage: "\n -s Show partition sizes in kb for each DISK, then exit" //usage: ) //usage: "\n -b 2048 (for certain MO disks) use 2048-byte sectors" //usage: "\n -C CYLINDERS Set number of cylinders/heads/sectors" //usage: "\n -H HEADS" //usage: "\n -S SECTORS" #ifndef _LARGEFILE64_SOURCE /* For lseek64 */ # define _LARGEFILE64_SOURCE #endif #include /* assert */ #include #if !defined(BLKSSZGET) # define BLKSSZGET _IO(0x12, 104) #endif #if !defined(BLKGETSIZE64) # define BLKGETSIZE64 _IOR(0x12,114,size_t) #endif #include "libbb.h" #if BB_LITTLE_ENDIAN # define inline_if_little_endian ALWAYS_INLINE #else # define inline_if_little_endian /* nothing */ #endif /* Looks like someone forgot to add this to config system */ #ifndef ENABLE_FEATURE_FDISK_BLKSIZE # define ENABLE_FEATURE_FDISK_BLKSIZE 0 # define IF_FEATURE_FDISK_BLKSIZE(a) #endif #define DEFAULT_SECTOR_SIZE 512 #define DEFAULT_SECTOR_SIZE_STR "512" #define MAX_SECTOR_SIZE 2048 #define SECTOR_SIZE 512 /* still used in osf/sgi/sun code */ #define MAXIMUM_PARTS 60 #define ACTIVE_FLAG 0x80 #define EXTENDED 0x05 #define WIN98_EXTENDED 0x0f #define LINUX_PARTITION 0x81 #define LINUX_SWAP 0x82 #define LINUX_NATIVE 0x83 #define LINUX_EXTENDED 0x85 #define LINUX_LVM 0x8e #define LINUX_RAID 0xfd enum { OPT_b = 1 << 0, OPT_C = 1 << 1, OPT_H = 1 << 2, OPT_l = 1 << 3, OPT_S = 1 << 4, OPT_u = 1 << 5, OPT_s = (1 << 6) * ENABLE_FEATURE_FDISK_BLKSIZE, }; typedef unsigned long long ullong; /* Used for sector numbers. Partition formats we know * do not support more than 2^32 sectors */ typedef uint32_t sector_t; #if UINT_MAX == 4294967295 # define SECT_FMT "" #elif ULONG_MAX == 4294967295 # define SECT_FMT "l" #else # error Cant detect sizeof(uint32_t) #endif struct hd_geometry { unsigned char heads; unsigned char sectors; unsigned short cylinders; unsigned long start; }; #define HDIO_GETGEO 0x0301 /* get device geometry */ static const char msg_building_new_label[] ALIGN1 = "Building a new %s. Changes will remain in memory only,\n" "until you decide to write them. After that the previous content\n" "won't be recoverable.\n\n"; static const char msg_part_already_defined[] ALIGN1 = "Partition %u is already defined, delete it before re-adding\n"; struct partition { unsigned char boot_ind; /* 0x80 - active */ unsigned char head; /* starting head */ unsigned char sector; /* starting sector */ unsigned char cyl; /* starting cylinder */ unsigned char sys_ind; /* what partition type */ unsigned char end_head; /* end head */ unsigned char end_sector; /* end sector */ unsigned char end_cyl; /* end cylinder */ unsigned char start4[4]; /* starting sector counting from 0 */ unsigned char size4[4]; /* nr of sectors in partition */ } PACKED; /* * per partition table entry data * * The four primary partitions have the same sectorbuffer (MBRbuffer) * and have NULL ext_pointer. * Each logical partition table entry has two pointers, one for the * partition and one link to the next one. */ struct pte { struct partition *part_table; /* points into sectorbuffer */ struct partition *ext_pointer; /* points into sectorbuffer */ sector_t offset_from_dev_start; /* disk sector number */ char *sectorbuffer; /* disk sector contents */ #if ENABLE_FEATURE_FDISK_WRITABLE char changed; /* boolean */ #endif }; #define unable_to_open "can't open '%s'" #define unable_to_read "can't read from %s" #define unable_to_seek "can't seek on %s" enum label_type { LABEL_DOS, LABEL_SUN, LABEL_SGI, LABEL_AIX, LABEL_OSF, LABEL_GPT }; #define LABEL_IS_DOS (LABEL_DOS == current_label_type) #if ENABLE_FEATURE_SUN_LABEL #define LABEL_IS_SUN (LABEL_SUN == current_label_type) #define STATIC_SUN static #else #define LABEL_IS_SUN 0 #define STATIC_SUN extern #endif #if ENABLE_FEATURE_SGI_LABEL #define LABEL_IS_SGI (LABEL_SGI == current_label_type) #define STATIC_SGI static #else #define LABEL_IS_SGI 0 #define STATIC_SGI extern #endif #if ENABLE_FEATURE_AIX_LABEL #define LABEL_IS_AIX (LABEL_AIX == current_label_type) #define STATIC_AIX static #else #define LABEL_IS_AIX 0 #define STATIC_AIX extern #endif #if ENABLE_FEATURE_OSF_LABEL #define LABEL_IS_OSF (LABEL_OSF == current_label_type) #define STATIC_OSF static #else #define LABEL_IS_OSF 0 #define STATIC_OSF extern #endif #if ENABLE_FEATURE_GPT_LABEL #define LABEL_IS_GPT (LABEL_GPT == current_label_type) #define STATIC_GPT static #else #define LABEL_IS_GPT 0 #define STATIC_GPT extern #endif enum action { OPEN_MAIN, TRY_ONLY, CREATE_EMPTY_DOS, CREATE_EMPTY_SUN }; static void update_units(void); #if ENABLE_FEATURE_FDISK_WRITABLE static void change_units(void); static void reread_partition_table(int leave); static void delete_partition(int i); static unsigned get_partition(int warn, unsigned max); static void list_types(const char *const *sys); static sector_t read_int(sector_t low, sector_t dflt, sector_t high, sector_t base, const char *mesg); #endif static const char *partition_type(unsigned char type); static void get_geometry(void); static void read_pte(struct pte *pe, sector_t offset); #if ENABLE_FEATURE_SUN_LABEL || ENABLE_FEATURE_FDISK_WRITABLE static int get_boot(enum action what); #else static int get_boot(void); #endif #define PLURAL 0 #define SINGULAR 1 static sector_t get_start_sect(const struct partition *p); static sector_t get_nr_sects(const struct partition *p); /* DOS partition types */ static const char *const i386_sys_types[] = { "\x00" "Empty", "\x01" "FAT12", "\x04" "FAT16 <32M", "\x05" "Extended", /* DOS 3.3+ extended partition */ "\x06" "FAT16", /* DOS 16-bit >=32M */ "\x07" "HPFS/NTFS", /* OS/2 IFS, eg, HPFS or NTFS or QNX */ "\x0a" "OS/2 Boot Manager",/* OS/2 Boot Manager */ "\x0b" "Win95 FAT32", "\x0c" "Win95 FAT32 (LBA)",/* LBA really is 'Extended Int 13h' */ "\x0e" "Win95 FAT16 (LBA)", "\x0f" "Win95 Ext'd (LBA)", "\x11" "Hidden FAT12", "\x12" "Compaq diagnostics", "\x14" "Hidden FAT16 <32M", "\x16" "Hidden FAT16", "\x17" "Hidden HPFS/NTFS", "\x1b" "Hidden Win95 FAT32", "\x1c" "Hidden W95 FAT32 (LBA)", "\x1e" "Hidden W95 FAT16 (LBA)", "\x3c" "Part.Magic recovery", "\x41" "PPC PReP Boot", "\x42" "SFS", "\x63" "GNU HURD or SysV", /* GNU HURD or Mach or Sys V/386 (such as ISC UNIX) */ "\x80" "Old Minix", /* Minix 1.4a and earlier */ "\x81" "Minix / old Linux",/* Minix 1.4b and later */ "\x82" "Linux swap", /* also Solaris */ "\x83" "Linux", "\x84" "OS/2 hidden C: drive", "\x85" "Linux extended", "\x86" "NTFS volume set", "\x87" "NTFS volume set", "\x8e" "Linux LVM", "\x9f" "BSD/OS", /* BSDI */ "\xa0" "Thinkpad hibernation", "\xa5" "FreeBSD", /* various BSD flavours */ "\xa6" "OpenBSD", "\xa8" "Darwin UFS", "\xa9" "NetBSD", "\xab" "Darwin boot", "\xb7" "BSDI fs", "\xb8" "BSDI swap", "\xbe" "Solaris boot", "\xeb" "BeOS fs", "\xee" "EFI GPT", /* Intel EFI GUID Partition Table */ "\xef" "EFI (FAT-12/16/32)", /* Intel EFI System Partition */ "\xf0" "Linux/PA-RISC boot", /* Linux/PA-RISC boot loader */ "\xf2" "DOS secondary", /* DOS 3.3+ secondary */ "\xfd" "Linux raid autodetect", /* New (2.2.x) raid partition with autodetect using persistent superblock */ #if 0 /* ENABLE_WEIRD_PARTITION_TYPES */ "\x02" "XENIX root", "\x03" "XENIX usr", "\x08" "AIX", /* AIX boot (AIX -- PS/2 port) or SplitDrive */ "\x09" "AIX bootable", /* AIX data or Coherent */ "\x10" "OPUS", "\x18" "AST SmartSleep", "\x24" "NEC DOS", "\x39" "Plan 9", "\x40" "Venix 80286", "\x4d" "QNX4.x", "\x4e" "QNX4.x 2nd part", "\x4f" "QNX4.x 3rd part", "\x50" "OnTrack DM", "\x51" "OnTrack DM6 Aux1", /* (or Novell) */ "\x52" "CP/M", /* CP/M or Microport SysV/AT */ "\x53" "OnTrack DM6 Aux3", "\x54" "OnTrackDM6", "\x55" "EZ-Drive", "\x56" "Golden Bow", "\x5c" "Priam Edisk", "\x61" "SpeedStor", "\x64" "Novell Netware 286", "\x65" "Novell Netware 386", "\x70" "DiskSecure Multi-Boot", "\x75" "PC/IX", "\x93" "Amoeba", "\x94" "Amoeba BBT", /* (bad block table) */ "\xa7" "NeXTSTEP", "\xbb" "Boot Wizard hidden", "\xc1" "DRDOS/sec (FAT-12)", "\xc4" "DRDOS/sec (FAT-16 < 32M)", "\xc6" "DRDOS/sec (FAT-16)", "\xc7" "Syrinx", "\xda" "Non-FS data", "\xdb" "CP/M / CTOS / ...",/* CP/M or Concurrent CP/M or Concurrent DOS or CTOS */ "\xde" "Dell Utility", /* Dell PowerEdge Server utilities */ "\xdf" "BootIt", /* BootIt EMBRM */ "\xe1" "DOS access", /* DOS access or SpeedStor 12-bit FAT extended partition */ "\xe3" "DOS R/O", /* DOS R/O or SpeedStor */ "\xe4" "SpeedStor", /* SpeedStor 16-bit FAT extended partition < 1024 cyl. */ "\xf1" "SpeedStor", "\xf4" "SpeedStor", /* SpeedStor large partition */ "\xfe" "LANstep", /* SpeedStor >1024 cyl. or LANstep */ "\xff" "BBT", /* Xenix Bad Block Table */ #endif NULL }; enum { dev_fd = 3 /* the disk */ }; /* Globals */ struct globals { char *line_ptr; const char *disk_device; int g_partitions; // = 4; /* maximum partition + 1 */ unsigned units_per_sector; // = 1; unsigned sector_size; // = DEFAULT_SECTOR_SIZE; unsigned user_set_sector_size; unsigned sector_offset; // = 1; unsigned g_heads, g_sectors, g_cylinders; smallint /* enum label_type */ current_label_type; smallint display_in_cyl_units; // = 1; #if ENABLE_FEATURE_OSF_LABEL smallint possibly_osf_label; #endif smallint listing; /* no aborts for fdisk -l */ smallint dos_compatible_flag; // = 1; #if ENABLE_FEATURE_FDISK_WRITABLE //int dos_changed; smallint nowarn; /* no warnings for fdisk -l/-s */ #endif int ext_index; /* the prime extended partition */ unsigned user_cylinders, user_heads, user_sectors; unsigned pt_heads, pt_sectors; unsigned kern_heads, kern_sectors; sector_t extended_offset; /* offset of link pointers */ sector_t total_number_of_sectors; jmp_buf listingbuf; char line_buffer[80]; char partname_buffer[80]; /* Raw disk label. For DOS-type partition tables the MBR, * with descriptions of the primary partitions. */ char MBRbuffer[MAX_SECTOR_SIZE]; /* Partition tables */ struct pte ptes[MAXIMUM_PARTS]; }; #define G (*ptr_to_globals) #define line_ptr (G.line_ptr ) #define disk_device (G.disk_device ) #define g_partitions (G.g_partitions ) #define units_per_sector (G.units_per_sector ) #define sector_size (G.sector_size ) #define user_set_sector_size (G.user_set_sector_size) #define sector_offset (G.sector_offset ) #define g_heads (G.g_heads ) #define g_sectors (G.g_sectors ) #define g_cylinders (G.g_cylinders ) #define current_label_type (G.current_label_type ) #define display_in_cyl_units (G.display_in_cyl_units) #define possibly_osf_label (G.possibly_osf_label ) #define listing (G.listing ) #define dos_compatible_flag (G.dos_compatible_flag ) #define nowarn (G.nowarn ) #define ext_index (G.ext_index ) #define user_cylinders (G.user_cylinders ) #define user_heads (G.user_heads ) #define user_sectors (G.user_sectors ) #define pt_heads (G.pt_heads ) #define pt_sectors (G.pt_sectors ) #define kern_heads (G.kern_heads ) #define kern_sectors (G.kern_sectors ) #define extended_offset (G.extended_offset ) #define total_number_of_sectors (G.total_number_of_sectors) #define listingbuf (G.listingbuf ) #define line_buffer (G.line_buffer ) #define partname_buffer (G.partname_buffer) #define MBRbuffer (G.MBRbuffer ) #define ptes (G.ptes ) #define INIT_G() do { \ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ sector_size = DEFAULT_SECTOR_SIZE; \ sector_offset = 1; \ g_partitions = 4; \ display_in_cyl_units = 1; \ units_per_sector = 1; \ dos_compatible_flag = 1; \ } while (0) /* TODO: move to libbb? */ /* TODO: return unsigned long long, FEATURE_FDISK_BLKSIZE _can_ handle * disks > 2^32 sectors */ static sector_t bb_BLKGETSIZE_sectors(int fd) { uint64_t v64; unsigned long longsectors; if (ioctl(fd, BLKGETSIZE64, &v64) == 0) { /* Got bytes, convert to 512 byte sectors */ v64 >>= 9; if (v64 != (sector_t)v64) { ret_trunc: /* Not only DOS, but all other partition tables * we support can't record more than 32 bit * sector counts or offsets */ bb_error_msg("device has more than 2^32 sectors, can't use all of them"); v64 = (uint32_t)-1L; } return v64; } /* Needs temp of type long */ if (ioctl(fd, BLKGETSIZE, &longsectors)) { /* Perhaps this is a disk image */ off_t sz = lseek(fd, 0, SEEK_END); longsectors = 0; if (sz > 0) longsectors = (uoff_t)sz / sector_size; lseek(fd, 0, SEEK_SET); } if (sizeof(long) > sizeof(sector_t) && longsectors != (sector_t)longsectors ) { goto ret_trunc; } return longsectors; } #define IS_EXTENDED(i) \ ((i) == EXTENDED || (i) == WIN98_EXTENDED || (i) == LINUX_EXTENDED) #define cround(n) (display_in_cyl_units ? ((n)/units_per_sector)+1 : (n)) #define scround(x) (((x)+units_per_sector-1)/units_per_sector) #define pt_offset(b, n) \ ((struct partition *)((b) + 0x1be + (n) * sizeof(struct partition))) #define sector(s) ((s) & 0x3f) #define cylinder(s, c) ((c) | (((s) & 0xc0) << 2)) #define hsc2sector(h,s,c) \ (sector(s) - 1 + sectors * ((h) + heads * cylinder(s,c))) static void close_dev_fd(void) { /* Not really closing, but making sure it is open, and to harmless place */ xmove_fd(xopen(bb_dev_null, O_RDONLY), dev_fd); } /* * Return partition name - uses static storage */ static const char * partname(const char *dev, int pno, int lth) { const char *p; int w, wp; int bufsiz; char *bufp; bufp = partname_buffer; bufsiz = sizeof(partname_buffer); w = strlen(dev); p = ""; if (isdigit(dev[w-1])) p = "p"; /* devfs kludge - note: fdisk partition names are not supposed to equal kernel names, so there is no reason to do this */ if (strcmp(dev + w - 4, "disc") == 0) { w -= 4; p = "part"; } wp = strlen(p); if (lth) { snprintf(bufp, bufsiz, "%*.*s%s%-2u", lth-wp-2, w, dev, p, pno); } else { snprintf(bufp, bufsiz, "%.*s%s%-2u", w, dev, p, pno); } return bufp; } static ALWAYS_INLINE struct partition * get_part_table(int i) { return ptes[i].part_table; } static const char * str_units(int n) { /* n==1: use singular */ if (n == 1) return display_in_cyl_units ? "cylinder" : "sector"; return display_in_cyl_units ? "cylinders" : "sectors"; } static int valid_part_table_flag(const char *mbuffer) { return (mbuffer[510] == 0x55 && (uint8_t)mbuffer[511] == 0xaa); } static void fdisk_fatal(const char *why) { if (listing) { close_dev_fd(); longjmp(listingbuf, 1); } bb_error_msg_and_die(why, disk_device); } static void seek_sector(sector_t secno) { #if ENABLE_FDISK_SUPPORT_LARGE_DISKS off64_t off = (off64_t)secno * sector_size; if (lseek64(dev_fd, off, SEEK_SET) == (off64_t) -1) fdisk_fatal(unable_to_seek); #else uint64_t off = (uint64_t)secno * sector_size; if (off > MAXINT(off_t) || lseek(dev_fd, (off_t)off, SEEK_SET) == (off_t) -1 ) { fdisk_fatal(unable_to_seek); } #endif } #if ENABLE_FEATURE_FDISK_WRITABLE /* Read line; return 0 or first printable char */ static int read_line(const char *prompt) { int sz; sz = read_line_input(NULL, prompt, line_buffer, sizeof(line_buffer), /*timeout*/ -1); if (sz <= 0) exit(EXIT_SUCCESS); /* Ctrl-D or Ctrl-C */ if (line_buffer[sz-1] == '\n') line_buffer[--sz] = '\0'; line_ptr = line_buffer; while (*line_ptr != '\0' && (unsigned char)*line_ptr <= ' ') line_ptr++; return *line_ptr; } static void set_all_unchanged(void) { int i; for (i = 0; i < MAXIMUM_PARTS; i++) ptes[i].changed = 0; } static ALWAYS_INLINE void set_changed(int i) { ptes[i].changed = 1; } static ALWAYS_INLINE void write_part_table_flag(char *b) { b[510] = 0x55; b[511] = 0xaa; } static char read_nonempty(const char *mesg) { while (!read_line(mesg)) continue; return *line_ptr; } static char read_maybe_empty(const char *mesg) { if (!read_line(mesg)) { line_ptr = line_buffer; line_ptr[0] = '\n'; line_ptr[1] = '\0'; } return line_ptr[0]; } static int read_hex(const char *const *sys) { unsigned long v; while (1) { read_nonempty("Hex code (type L to list codes): "); if ((line_ptr[0] | 0x20) == 'l') { list_types(sys); continue; } v = bb_strtoul(line_ptr, NULL, 16); if (v <= 0xff) return v; } } static void write_sector(sector_t secno, const void *buf) { seek_sector(secno); xwrite(dev_fd, buf, sector_size); } #endif /* FEATURE_FDISK_WRITABLE */ #include "fdisk_aix.c" struct sun_partition { unsigned char info[128]; /* Informative text string */ unsigned char spare0[14]; struct sun_info { unsigned char spare1; unsigned char id; unsigned char spare2; unsigned char flags; } infos[8]; unsigned char spare1[246]; /* Boot information etc. */ unsigned short rspeed; /* Disk rotational speed */ unsigned short pcylcount; /* Physical cylinder count */ unsigned short sparecyl; /* extra sects per cylinder */ unsigned char spare2[4]; /* More magic... */ unsigned short ilfact; /* Interleave factor */ unsigned short ncyl; /* Data cylinder count */ unsigned short nacyl; /* Alt. cylinder count */ unsigned short ntrks; /* Tracks per cylinder */ unsigned short nsect; /* Sectors per track */ unsigned char spare3[4]; /* Even more magic... */ struct sun_partinfo { uint32_t start_cylinder; uint32_t num_sectors; } partitions[8]; unsigned short magic; /* Magic number */ unsigned short csum; /* Label xor'd checksum */ } FIX_ALIASING; typedef struct sun_partition sun_partition; #define sunlabel ((sun_partition *)MBRbuffer) STATIC_OSF void bsd_select(void); STATIC_OSF void xbsd_print_disklabel(int); #include "fdisk_osf.c" STATIC_GPT void gpt_list_table(int xtra); #include "fdisk_gpt.c" #if ENABLE_FEATURE_SGI_LABEL || ENABLE_FEATURE_SUN_LABEL static uint16_t fdisk_swap16(uint16_t x) { return (x << 8) | (x >> 8); } static uint32_t fdisk_swap32(uint32_t x) { return (x << 24) | ((x & 0xFF00) << 8) | ((x & 0xFF0000) >> 8) | (x >> 24); } #endif STATIC_SGI const char *const sgi_sys_types[]; STATIC_SGI unsigned sgi_get_num_sectors(int i); STATIC_SGI int sgi_get_sysid(int i); STATIC_SGI void sgi_delete_partition(int i); STATIC_SGI void sgi_change_sysid(int i, int sys); STATIC_SGI void sgi_list_table(int xtra); #if ENABLE_FEATURE_FDISK_ADVANCED STATIC_SGI void sgi_set_xcyl(void); #endif STATIC_SGI int verify_sgi(int verbose); STATIC_SGI void sgi_add_partition(int n, int sys); STATIC_SGI void sgi_set_swappartition(int i); STATIC_SGI const char *sgi_get_bootfile(void); STATIC_SGI void sgi_set_bootfile(const char* aFile); STATIC_SGI void create_sgiinfo(void); STATIC_SGI void sgi_write_table(void); STATIC_SGI void sgi_set_bootpartition(int i); #include "fdisk_sgi.c" STATIC_SUN const char *const sun_sys_types[]; STATIC_SUN void sun_delete_partition(int i); STATIC_SUN void sun_change_sysid(int i, int sys); STATIC_SUN void sun_list_table(int xtra); STATIC_SUN void add_sun_partition(int n, int sys); #if ENABLE_FEATURE_FDISK_ADVANCED STATIC_SUN void sun_set_alt_cyl(void); STATIC_SUN void sun_set_ncyl(int cyl); STATIC_SUN void sun_set_xcyl(void); STATIC_SUN void sun_set_ilfact(void); STATIC_SUN void sun_set_rspeed(void); STATIC_SUN void sun_set_pcylcount(void); #endif STATIC_SUN void toggle_sunflags(int i, unsigned char mask); STATIC_SUN void verify_sun(void); STATIC_SUN void sun_write_table(void); #include "fdisk_sun.c" static inline_if_little_endian unsigned read4_little_endian(const unsigned char *cp) { uint32_t v; move_from_unaligned32(v, cp); return SWAP_LE32(v); } static sector_t get_start_sect(const struct partition *p) { return read4_little_endian(p->start4); } static sector_t get_nr_sects(const struct partition *p) { return read4_little_endian(p->size4); } #if ENABLE_FEATURE_FDISK_WRITABLE /* start_sect and nr_sects are stored little endian on all machines */ /* moreover, they are not aligned correctly */ static inline_if_little_endian void store4_little_endian(unsigned char *cp, unsigned val) { uint32_t v = SWAP_LE32(val); move_to_unaligned32(cp, v); } static void set_start_sect(struct partition *p, unsigned start_sect) { store4_little_endian(p->start4, start_sect); } static void set_nr_sects(struct partition *p, unsigned nr_sects) { store4_little_endian(p->size4, nr_sects); } #endif /* Allocate a buffer and read a partition table sector */ static void read_pte(struct pte *pe, sector_t offset) { pe->offset_from_dev_start = offset; pe->sectorbuffer = xzalloc(sector_size); seek_sector(offset); /* xread would make us abort - bad for fdisk -l */ if (full_read(dev_fd, pe->sectorbuffer, sector_size) != sector_size) fdisk_fatal(unable_to_read); #if ENABLE_FEATURE_FDISK_WRITABLE pe->changed = 0; #endif pe->part_table = pe->ext_pointer = NULL; } static sector_t get_partition_start_from_dev_start(const struct pte *pe) { return pe->offset_from_dev_start + get_start_sect(pe->part_table); } #if ENABLE_FEATURE_FDISK_WRITABLE /* * Avoid warning about DOS partitions when no DOS partition was changed. * Here a heuristic "is probably dos partition". * We might also do the opposite and warn in all cases except * for "is probably nondos partition". */ #ifdef UNUSED static int is_dos_partition(int t) { return (t == 1 || t == 4 || t == 6 || t == 0x0b || t == 0x0c || t == 0x0e || t == 0x11 || t == 0x12 || t == 0x14 || t == 0x16 || t == 0x1b || t == 0x1c || t == 0x1e || t == 0x24 || t == 0xc1 || t == 0xc4 || t == 0xc6); } #endif static void menu(void) { puts("Command Action"); if (LABEL_IS_SUN) { puts("a\ttoggle a read only flag"); /* sun */ puts("b\tedit bsd disklabel"); puts("c\ttoggle the mountable flag"); /* sun */ puts("d\tdelete a partition"); puts("l\tlist known partition types"); puts("n\tadd a new partition"); puts("o\tcreate a new empty DOS partition table"); puts("p\tprint the partition table"); puts("q\tquit without saving changes"); puts("s\tcreate a new empty Sun disklabel"); /* sun */ puts("t\tchange a partition's system id"); puts("u\tchange display/entry units"); puts("v\tverify the partition table"); puts("w\twrite table to disk and exit"); #if ENABLE_FEATURE_FDISK_ADVANCED puts("x\textra functionality (experts only)"); #endif } else if (LABEL_IS_SGI) { puts("a\tselect bootable partition"); /* sgi flavour */ puts("b\tedit bootfile entry"); /* sgi */ puts("c\tselect sgi swap partition"); /* sgi flavour */ puts("d\tdelete a partition"); puts("l\tlist known partition types"); puts("n\tadd a new partition"); puts("o\tcreate a new empty DOS partition table"); puts("p\tprint the partition table"); puts("q\tquit without saving changes"); puts("s\tcreate a new empty Sun disklabel"); /* sun */ puts("t\tchange a partition's system id"); puts("u\tchange display/entry units"); puts("v\tverify the partition table"); puts("w\twrite table to disk and exit"); } else if (LABEL_IS_AIX) { puts("o\tcreate a new empty DOS partition table"); puts("q\tquit without saving changes"); puts("s\tcreate a new empty Sun disklabel"); /* sun */ } else if (LABEL_IS_GPT) { puts("o\tcreate a new empty DOS partition table"); puts("p\tprint the partition table"); puts("q\tquit without saving changes"); puts("s\tcreate a new empty Sun disklabel"); /* sun */ } else { puts("a\ttoggle a bootable flag"); puts("b\tedit bsd disklabel"); puts("c\ttoggle the dos compatibility flag"); puts("d\tdelete a partition"); puts("l\tlist known partition types"); puts("n\tadd a new partition"); puts("o\tcreate a new empty DOS partition table"); puts("p\tprint the partition table"); puts("q\tquit without saving changes"); puts("s\tcreate a new empty Sun disklabel"); /* sun */ puts("t\tchange a partition's system id"); puts("u\tchange display/entry units"); puts("v\tverify the partition table"); puts("w\twrite table to disk and exit"); #if ENABLE_FEATURE_FDISK_ADVANCED puts("x\textra functionality (experts only)"); #endif } } #endif /* FEATURE_FDISK_WRITABLE */ #if ENABLE_FEATURE_FDISK_ADVANCED static void xmenu(void) { puts("Command Action"); if (LABEL_IS_SUN) { puts("a\tchange number of alternate cylinders"); /*sun*/ puts("c\tchange number of cylinders"); puts("d\tprint the raw data in the partition table"); puts("e\tchange number of extra sectors per cylinder");/*sun*/ puts("h\tchange number of heads"); puts("i\tchange interleave factor"); /*sun*/ puts("o\tchange rotation speed (rpm)"); /*sun*/ puts("p\tprint the partition table"); puts("q\tquit without saving changes"); puts("r\treturn to main menu"); puts("s\tchange number of sectors/track"); puts("v\tverify the partition table"); puts("w\twrite table to disk and exit"); puts("y\tchange number of physical cylinders"); /*sun*/ } else if (LABEL_IS_SGI) { puts("b\tmove beginning of data in a partition"); /* !sun */ puts("c\tchange number of cylinders"); puts("d\tprint the raw data in the partition table"); puts("e\tlist extended partitions"); /* !sun */ puts("g\tcreate an IRIX (SGI) partition table");/* sgi */ puts("h\tchange number of heads"); puts("p\tprint the partition table"); puts("q\tquit without saving changes"); puts("r\treturn to main menu"); puts("s\tchange number of sectors/track"); puts("v\tverify the partition table"); puts("w\twrite table to disk and exit"); } else if (LABEL_IS_AIX) { puts("b\tmove beginning of data in a partition"); /* !sun */ puts("c\tchange number of cylinders"); puts("d\tprint the raw data in the partition table"); puts("e\tlist extended partitions"); /* !sun */ puts("g\tcreate an IRIX (SGI) partition table");/* sgi */ puts("h\tchange number of heads"); puts("p\tprint the partition table"); puts("q\tquit without saving changes"); puts("r\treturn to main menu"); puts("s\tchange number of sectors/track"); puts("v\tverify the partition table"); puts("w\twrite table to disk and exit"); } else { puts("b\tmove beginning of data in a partition"); /* !sun */ puts("c\tchange number of cylinders"); puts("d\tprint the raw data in the partition table"); puts("e\tlist extended partitions"); /* !sun */ puts("f\tfix partition order"); /* !sun, !aix, !sgi */ #if ENABLE_FEATURE_SGI_LABEL puts("g\tcreate an IRIX (SGI) partition table");/* sgi */ #endif puts("h\tchange number of heads"); puts("p\tprint the partition table"); puts("q\tquit without saving changes"); puts("r\treturn to main menu"); puts("s\tchange number of sectors/track"); puts("v\tverify the partition table"); puts("w\twrite table to disk and exit"); } } #endif /* ADVANCED mode */ #if ENABLE_FEATURE_FDISK_WRITABLE static const char *const * get_sys_types(void) { return ( LABEL_IS_SUN ? sun_sys_types : LABEL_IS_SGI ? sgi_sys_types : i386_sys_types); } #else #define get_sys_types() i386_sys_types #endif static const char * partition_type(unsigned char type) { int i; const char *const *types = get_sys_types(); for (i = 0; types[i]; i++) if ((unsigned char)types[i][0] == type) return types[i] + 1; return "Unknown"; } static int is_cleared_partition(const struct partition *p) { /* We consider partition "cleared" only if it has only zeros */ const char *cp = (const char *)p; int cnt = sizeof(*p); char bits = 0; while (--cnt >= 0) bits |= *cp++; return (bits == 0); } static void clear_partition(struct partition *p) { if (p) memset(p, 0, sizeof(*p)); } #if ENABLE_FEATURE_FDISK_WRITABLE static int get_sysid(int i) { return LABEL_IS_SUN ? sunlabel->infos[i].id : (LABEL_IS_SGI ? sgi_get_sysid(i) : ptes[i].part_table->sys_ind); } static void list_types(const char *const *sys) { enum { COLS = 3 }; unsigned last[COLS]; unsigned done, next, size; int i; for (size = 0; sys[size]; size++) continue; done = 0; for (i = COLS-1; i >= 0; i--) { done += (size + i - done) / (i + 1); last[COLS-1 - i] = done; } i = done = next = 0; do { printf("%c%2x %-22.22s", i ? ' ' : '\n', (unsigned char)sys[next][0], sys[next] + 1); next = last[i++] + done; if (i >= COLS || next >= last[i]) { i = 0; next = ++done; } } while (done < last[0]); bb_putchar('\n'); } #define set_hsc(h, s, c, sector) do \ { \ s = sector % g_sectors + 1; \ sector /= g_sectors; \ h = sector % g_heads; \ sector /= g_heads; \ c = sector & 0xff; \ s |= (sector >> 2) & 0xc0; \ } while (0) static void set_hsc_start_end(struct partition *p, sector_t start, sector_t stop) { if (dos_compatible_flag && (start / (g_sectors * g_heads) > 1023)) start = g_heads * g_sectors * 1024 - 1; set_hsc(p->head, p->sector, p->cyl, start); if (dos_compatible_flag && (stop / (g_sectors * g_heads) > 1023)) stop = g_heads * g_sectors * 1024 - 1; set_hsc(p->end_head, p->end_sector, p->end_cyl, stop); } static void set_partition(int i, int doext, sector_t start, sector_t stop, int sysid) { struct partition *p; sector_t offset; if (doext) { p = ptes[i].ext_pointer; offset = extended_offset; } else { p = ptes[i].part_table; offset = ptes[i].offset_from_dev_start; } p->boot_ind = 0; p->sys_ind = sysid; set_start_sect(p, start - offset); set_nr_sects(p, stop - start + 1); set_hsc_start_end(p, start, stop); ptes[i].changed = 1; } #endif static int warn_geometry(void) { if (g_heads && g_sectors && g_cylinders) return 0; printf("Unknown value(s) for:"); if (!g_heads) printf(" heads"); if (!g_sectors) printf(" sectors"); if (!g_cylinders) printf(" cylinders"); printf( #if ENABLE_FEATURE_FDISK_WRITABLE " (settable in the extra functions menu)" #endif "\n"); return 1; } static void update_units(void) { int cyl_units = g_heads * g_sectors; if (display_in_cyl_units && cyl_units) units_per_sector = cyl_units; else units_per_sector = 1; /* in sectors */ } #if ENABLE_FEATURE_FDISK_WRITABLE static void warn_cylinders(void) { if (LABEL_IS_DOS && g_cylinders > 1024 && !nowarn) printf("\n" "The number of cylinders for this disk is set to %u.\n" "There is nothing wrong with that, but this is larger than 1024,\n" "and could in certain setups cause problems with:\n" "1) software that runs at boot time (e.g., old versions of LILO)\n" "2) booting and partitioning software from other OSs\n" " (e.g., DOS FDISK, OS/2 FDISK)\n", g_cylinders); } #endif static void read_extended(int ext) { int i; struct pte *pex; struct partition *p, *q; ext_index = ext; pex = &ptes[ext]; pex->ext_pointer = pex->part_table; p = pex->part_table; if (!get_start_sect(p)) { printf("Bad offset in primary extended partition\n"); return; } while (IS_EXTENDED(p->sys_ind)) { struct pte *pe = &ptes[g_partitions]; if (g_partitions >= MAXIMUM_PARTS) { /* This is not a Linux restriction, but this program uses arrays of size MAXIMUM_PARTS. Do not try to 'improve' this test. */ struct pte *pre = &ptes[g_partitions - 1]; #if ENABLE_FEATURE_FDISK_WRITABLE printf("Warning: deleting partitions after %u\n", g_partitions); pre->changed = 1; #endif clear_partition(pre->ext_pointer); return; } read_pte(pe, extended_offset + get_start_sect(p)); if (!extended_offset) extended_offset = get_start_sect(p); q = p = pt_offset(pe->sectorbuffer, 0); for (i = 0; i < 4; i++, p++) if (get_nr_sects(p)) { if (IS_EXTENDED(p->sys_ind)) { if (pe->ext_pointer) printf("Warning: extra link " "pointer in partition table" " %u\n", g_partitions + 1); else pe->ext_pointer = p; } else if (p->sys_ind) { if (pe->part_table) printf("Warning: ignoring extra " "data in partition table" " %u\n", g_partitions + 1); else pe->part_table = p; } } /* very strange code here... */ if (!pe->part_table) { if (q != pe->ext_pointer) pe->part_table = q; else pe->part_table = q + 1; } if (!pe->ext_pointer) { if (q != pe->part_table) pe->ext_pointer = q; else pe->ext_pointer = q + 1; } p = pe->ext_pointer; g_partitions++; } #if ENABLE_FEATURE_FDISK_WRITABLE /* remove empty links */ remove: for (i = 4; i < g_partitions; i++) { struct pte *pe = &ptes[i]; if (!get_nr_sects(pe->part_table) && (g_partitions > 5 || ptes[4].part_table->sys_ind) ) { printf("Omitting empty partition (%u)\n", i+1); delete_partition(i); goto remove; /* numbering changed */ } } #endif } #if ENABLE_FEATURE_FDISK_WRITABLE static void create_doslabel(void) { printf(msg_building_new_label, "DOS disklabel"); current_label_type = LABEL_DOS; #if ENABLE_FEATURE_OSF_LABEL possibly_osf_label = 0; #endif g_partitions = 4; memset(&MBRbuffer[510 - 4*16], 0, 4*16); write_part_table_flag(MBRbuffer); extended_offset = 0; set_all_unchanged(); set_changed(0); get_boot(CREATE_EMPTY_DOS); } #endif static void get_sectorsize(void) { if (!user_set_sector_size) { int arg; if (ioctl(dev_fd, BLKSSZGET, &arg) == 0) sector_size = arg; if (sector_size != DEFAULT_SECTOR_SIZE) printf("Note: sector size is %u " "(not " DEFAULT_SECTOR_SIZE_STR ")\n", sector_size); } } static void get_kernel_geometry(void) { struct hd_geometry geometry; if (!ioctl(dev_fd, HDIO_GETGEO, &geometry)) { kern_heads = geometry.heads; kern_sectors = geometry.sectors; /* never use geometry.cylinders - it is truncated */ } } static void get_partition_table_geometry(void) { const unsigned char *bufp = (const unsigned char *)MBRbuffer; struct partition *p; int i, h, s, hh, ss; int first = 1; int bad = 0; if (!(valid_part_table_flag((char*)bufp))) return; hh = ss = 0; for (i = 0; i < 4; i++) { p = pt_offset(bufp, i); if (p->sys_ind != 0) { h = p->end_head + 1; s = (p->end_sector & 077); if (first) { hh = h; ss = s; first = 0; } else if (hh != h || ss != s) bad = 1; } } if (!first && !bad) { pt_heads = hh; pt_sectors = ss; } } static void get_geometry(void) { int sec_fac; get_sectorsize(); sec_fac = sector_size / 512; #if ENABLE_FEATURE_SUN_LABEL guess_device_type(); #endif g_heads = g_cylinders = g_sectors = 0; kern_heads = kern_sectors = 0; pt_heads = pt_sectors = 0; get_kernel_geometry(); get_partition_table_geometry(); g_heads = user_heads ? user_heads : pt_heads ? pt_heads : kern_heads ? kern_heads : 255; g_sectors = user_sectors ? user_sectors : pt_sectors ? pt_sectors : kern_sectors ? kern_sectors : 63; total_number_of_sectors = bb_BLKGETSIZE_sectors(dev_fd); sector_offset = 1; if (dos_compatible_flag) sector_offset = g_sectors; g_cylinders = total_number_of_sectors / (g_heads * g_sectors * sec_fac); if (!g_cylinders) g_cylinders = user_cylinders; } /* * Opens disk_device and optionally reads MBR. * If what == OPEN_MAIN: * Open device, read MBR. Abort program on short read. Create empty * disklabel if the on-disk structure is invalid (WRITABLE mode). * If what == TRY_ONLY: * Open device, read MBR. Return an error if anything is out of place. * Do not create an empty disklabel. This is used for the "list" * operations: "fdisk -l /dev/sda" and "fdisk -l" (all devices). * If what == CREATE_EMPTY_*: * This means that get_boot() was called recursively from create_*label(). * Do not re-open the device; just set up the ptes array and print * geometry warnings. * * Returns: * -1: no 0xaa55 flag present (possibly entire disk BSD) * 0: found or created label * 1: I/O error */ #if ENABLE_FEATURE_SUN_LABEL || ENABLE_FEATURE_FDISK_WRITABLE static int get_boot(enum action what) #else static int get_boot(void) #define get_boot(what) get_boot() #endif { int i, fd; g_partitions = 4; for (i = 0; i < 4; i++) { struct pte *pe = &ptes[i]; pe->part_table = pt_offset(MBRbuffer, i); pe->ext_pointer = NULL; pe->offset_from_dev_start = 0; pe->sectorbuffer = MBRbuffer; #if ENABLE_FEATURE_FDISK_WRITABLE pe->changed = (what == CREATE_EMPTY_DOS); #endif } #if ENABLE_FEATURE_FDISK_WRITABLE // ALERT! highly idiotic design! // We end up here when we call get_boot() recursively // via get_boot() [table is bad] -> create_doslabel() -> get_boot(CREATE_EMPTY_DOS). // or get_boot() [table is bad] -> create_sunlabel() -> get_boot(CREATE_EMPTY_SUN). // (just factor out re-init of ptes[0,1,2,3] in a separate fn instead?) // So skip opening device _again_... if (what == CREATE_EMPTY_DOS IF_FEATURE_SUN_LABEL(|| what == CREATE_EMPTY_SUN)) goto created_table; fd = open(disk_device, (option_mask32 & OPT_l) ? O_RDONLY : O_RDWR); if (fd < 0) { fd = open(disk_device, O_RDONLY); if (fd < 0) { if (what == TRY_ONLY) return 1; fdisk_fatal(unable_to_open); } printf("'%s' is opened for read only\n", disk_device); } xmove_fd(fd, dev_fd); if (512 != full_read(dev_fd, MBRbuffer, 512)) { if (what == TRY_ONLY) { close_dev_fd(); return 1; } fdisk_fatal(unable_to_read); } #else fd = open(disk_device, O_RDONLY); if (fd < 0) return 1; if (512 != full_read(fd, MBRbuffer, 512)) { close(fd); return 1; } xmove_fd(fd, dev_fd); #endif get_geometry(); update_units(); #if ENABLE_FEATURE_SUN_LABEL if (check_sun_label()) return 0; #endif #if ENABLE_FEATURE_SGI_LABEL if (check_sgi_label()) return 0; #endif #if ENABLE_FEATURE_AIX_LABEL if (check_aix_label()) return 0; #endif #if ENABLE_FEATURE_GPT_LABEL if (check_gpt_label()) return 0; #endif #if ENABLE_FEATURE_OSF_LABEL if (check_osf_label()) { possibly_osf_label = 1; if (!valid_part_table_flag(MBRbuffer)) { current_label_type = LABEL_OSF; return 0; } printf("This disk has both DOS and BSD magic.\n" "Give the 'b' command to go to BSD mode.\n"); } #endif #if !ENABLE_FEATURE_FDISK_WRITABLE if (!valid_part_table_flag(MBRbuffer)) return -1; #else if (!valid_part_table_flag(MBRbuffer)) { if (what == OPEN_MAIN) { printf("Device contains neither a valid DOS " "partition table, nor Sun, SGI, OSF or GPT " "disklabel\n"); #ifdef __sparc__ IF_FEATURE_SUN_LABEL(create_sunlabel();) #else create_doslabel(); #endif return 0; } /* TRY_ONLY: */ return -1; } created_table: #endif /* FEATURE_FDISK_WRITABLE */ IF_FEATURE_FDISK_WRITABLE(warn_cylinders();) warn_geometry(); for (i = 0; i < 4; i++) { if (IS_EXTENDED(ptes[i].part_table->sys_ind)) { if (g_partitions != 4) printf("Ignoring extra extended " "partition %u\n", i + 1); else read_extended(i); } } for (i = 3; i < g_partitions; i++) { struct pte *pe = &ptes[i]; if (!valid_part_table_flag(pe->sectorbuffer)) { printf("Warning: invalid flag 0x%02x,0x%02x of partition " "table %u will be corrected by w(rite)\n", pe->sectorbuffer[510], pe->sectorbuffer[511], i + 1); IF_FEATURE_FDISK_WRITABLE(pe->changed = 1;) } } return 0; } #if ENABLE_FEATURE_FDISK_WRITABLE /* * Print the message MESG, then read an integer between LOW and HIGH (inclusive). * If the user hits Enter, DFLT is returned. * Answers like +10 are interpreted as offsets from BASE. * * There is no default if DFLT is not between LOW and HIGH. */ static sector_t read_int(sector_t low, sector_t dflt, sector_t high, sector_t base, const char *mesg) { sector_t value; int default_ok = 1; const char *fmt = "%s (%u-%u, default %u): "; if (dflt < low || dflt > high) { fmt = "%s (%u-%u): "; default_ok = 0; } while (1) { int use_default = default_ok; /* ask question and read answer */ do { printf(fmt, mesg, low, high, dflt); read_maybe_empty(""); } while (*line_ptr != '\n' && !isdigit(*line_ptr) && *line_ptr != '-' && *line_ptr != '+'); if (*line_ptr == '+' || *line_ptr == '-') { int minus = (*line_ptr == '-'); int absolute = 0; value = atoi(line_ptr + 1); /* (1) if 2nd char is digit, use_default = 0. * (2) move line_ptr to first non-digit. */ while (isdigit(*++line_ptr)) use_default = 0; switch (*line_ptr) { case 'c': case 'C': if (!display_in_cyl_units) value *= g_heads * g_sectors; break; case 'K': absolute = 1024; break; case 'k': absolute = 1000; break; case 'm': case 'M': absolute = 1000000; break; case 'g': case 'G': absolute = 1000000000; break; default: break; } if (absolute) { ullong bytes; unsigned long unit; bytes = (ullong) value * absolute; unit = sector_size * units_per_sector; bytes += unit/2; /* round */ bytes /= unit; value = bytes; } if (minus) value = -value; value += base; } else { value = atoi(line_ptr); while (isdigit(*line_ptr)) { line_ptr++; use_default = 0; } } if (use_default) { value = dflt; printf("Using default value %u\n", value); } if (value >= low && value <= high) break; printf("Value is out of range\n"); } return value; } static unsigned get_partition(int warn, unsigned max) { struct pte *pe; unsigned i; i = read_int(1, 0, max, 0, "Partition number") - 1; pe = &ptes[i]; if (warn) { if ((!LABEL_IS_SUN && !LABEL_IS_SGI && !pe->part_table->sys_ind) || (LABEL_IS_SUN && (!sunlabel->partitions[i].num_sectors || !sunlabel->infos[i].id)) || (LABEL_IS_SGI && !sgi_get_num_sectors(i)) ) { printf("Warning: partition %u has empty type\n", i+1); } } return i; } static int get_existing_partition(int warn, unsigned max) { int pno = -1; unsigned i; for (i = 0; i < max; i++) { struct pte *pe = &ptes[i]; struct partition *p = pe->part_table; if (p && !is_cleared_partition(p)) { if (pno >= 0) goto not_unique; pno = i; } } if (pno >= 0) { printf("Selected partition %u\n", pno+1); return pno; } printf("No partition is defined yet!\n"); return -1; not_unique: return get_partition(warn, max); } static int get_nonexisting_partition(int warn, unsigned max) { int pno = -1; unsigned i; for (i = 0; i < max; i++) { struct pte *pe = &ptes[i]; struct partition *p = pe->part_table; if (p && is_cleared_partition(p)) { if (pno >= 0) goto not_unique; pno = i; } } if (pno >= 0) { printf("Selected partition %u\n", pno+1); return pno; } printf("All primary partitions have been defined already!\n"); return -1; not_unique: return get_partition(warn, max); } static void change_units(void) { display_in_cyl_units = !display_in_cyl_units; update_units(); printf("Changing display/entry units to %s\n", str_units(PLURAL)); } static void toggle_active(int i) { struct pte *pe = &ptes[i]; struct partition *p = pe->part_table; if (IS_EXTENDED(p->sys_ind) && !p->boot_ind) printf("WARNING: Partition %u is an extended partition\n", i + 1); p->boot_ind = (p->boot_ind ? 0 : ACTIVE_FLAG); pe->changed = 1; } static void toggle_dos_compatibility_flag(void) { dos_compatible_flag = 1 - dos_compatible_flag; if (dos_compatible_flag) { sector_offset = g_sectors; printf("DOS Compatibility flag is set\n"); } else { sector_offset = 1; printf("DOS Compatibility flag is not set\n"); } } static void delete_partition(int i) { struct pte *pe = &ptes[i]; struct partition *p = pe->part_table; struct partition *q = pe->ext_pointer; /* Note that for the fifth partition (i == 4) we don't actually * decrement partitions. */ if (warn_geometry()) return; /* C/H/S not set */ pe->changed = 1; if (LABEL_IS_SUN) { sun_delete_partition(i); return; } if (LABEL_IS_SGI) { sgi_delete_partition(i); return; } if (i < 4) { if (IS_EXTENDED(p->sys_ind) && i == ext_index) { g_partitions = 4; ptes[ext_index].ext_pointer = NULL; extended_offset = 0; } clear_partition(p); return; } if (!q->sys_ind && i > 4) { /* the last one in the chain - just delete */ --g_partitions; --i; clear_partition(ptes[i].ext_pointer); ptes[i].changed = 1; } else { /* not the last one - further ones will be moved down */ if (i > 4) { /* delete this link in the chain */ p = ptes[i-1].ext_pointer; *p = *q; set_start_sect(p, get_start_sect(q)); set_nr_sects(p, get_nr_sects(q)); ptes[i-1].changed = 1; } else if (g_partitions > 5) { /* 5 will be moved to 4 */ /* the first logical in a longer chain */ pe = &ptes[5]; if (pe->part_table) /* prevent SEGFAULT */ set_start_sect(pe->part_table, get_partition_start_from_dev_start(pe) - extended_offset); pe->offset_from_dev_start = extended_offset; pe->changed = 1; } if (g_partitions > 5) { g_partitions--; while (i < g_partitions) { ptes[i] = ptes[i+1]; i++; } } else { /* the only logical: clear only */ clear_partition(ptes[i].part_table); } } } static void change_sysid(void) { int i, sys, origsys; struct partition *p; /* If sgi_label then don't use get_existing_partition, let the user select a partition, since get_existing_partition() only works for Linux like partition tables. */ if (!LABEL_IS_SGI) { i = get_existing_partition(0, g_partitions); } else { i = get_partition(0, g_partitions); } if (i == -1) return; p = ptes[i].part_table; origsys = sys = get_sysid(i); /* if changing types T to 0 is allowed, then the reverse change must be allowed, too */ if (!sys && !LABEL_IS_SGI && !LABEL_IS_SUN && !get_nr_sects(p)) { printf("Partition %u does not exist yet!\n", i + 1); return; } while (1) { sys = read_hex(get_sys_types()); if (!sys && !LABEL_IS_SGI && !LABEL_IS_SUN) { printf("Type 0 means free space to many systems\n" "(but not to Linux). Having partitions of\n" "type 0 is probably unwise.\n"); /* break; */ } if (!LABEL_IS_SUN && !LABEL_IS_SGI) { if (IS_EXTENDED(sys) != IS_EXTENDED(p->sys_ind)) { printf("You cannot change a partition into" " an extended one or vice versa\n"); break; } } if (sys < 256) { #if ENABLE_FEATURE_SUN_LABEL if (LABEL_IS_SUN && i == 2 && sys != SUN_WHOLE_DISK) printf("Consider leaving partition 3 " "as Whole disk (5),\n" "as SunOS/Solaris expects it and " "even Linux likes it\n\n"); #endif #if ENABLE_FEATURE_SGI_LABEL if (LABEL_IS_SGI && ( (i == 10 && sys != SGI_ENTIRE_DISK) || (i == 8 && sys != 0) ) ) { printf("Consider leaving partition 9 " "as volume header (0),\nand " "partition 11 as entire volume (6)" "as IRIX expects it\n\n"); } #endif if (sys == origsys) break; if (LABEL_IS_SUN) { sun_change_sysid(i, sys); } else if (LABEL_IS_SGI) { sgi_change_sysid(i, sys); } else p->sys_ind = sys; printf("Changed system type of partition %u " "to %x (%s)\n", i + 1, sys, partition_type(sys)); ptes[i].changed = 1; //if (is_dos_partition(origsys) || is_dos_partition(sys)) // dos_changed = 1; break; } } } #endif /* FEATURE_FDISK_WRITABLE */ /* check_consistency() and linear2chs() added Sat Mar 6 12:28:16 1993, * faith@cs.unc.edu, based on code fragments from pfdisk by Gordon W. Ross, * Jan. 1990 (version 1.2.1 by Gordon W. Ross Aug. 1990; Modified by S. * Lubkin Oct. 1991). */ static void linear2chs(unsigned ls, unsigned *c, unsigned *h, unsigned *s) { int spc = g_heads * g_sectors; *c = ls / spc; ls = ls % spc; *h = ls / g_sectors; *s = ls % g_sectors + 1; /* sectors count from 1 */ } static void check_consistency(const struct partition *p, int partition) { unsigned pbc, pbh, pbs; /* physical beginning c, h, s */ unsigned pec, peh, pes; /* physical ending c, h, s */ unsigned lbc, lbh, lbs; /* logical beginning c, h, s */ unsigned lec, leh, les; /* logical ending c, h, s */ if (!g_heads || !g_sectors || (partition >= 4)) return; /* do not check extended partitions */ /* physical beginning c, h, s */ pbc = (p->cyl & 0xff) | ((p->sector << 2) & 0x300); pbh = p->head; pbs = p->sector & 0x3f; /* physical ending c, h, s */ pec = (p->end_cyl & 0xff) | ((p->end_sector << 2) & 0x300); peh = p->end_head; pes = p->end_sector & 0x3f; /* compute logical beginning (c, h, s) */ linear2chs(get_start_sect(p), &lbc, &lbh, &lbs); /* compute logical ending (c, h, s) */ linear2chs(get_start_sect(p) + get_nr_sects(p) - 1, &lec, &leh, &les); /* Same physical / logical beginning? */ if (g_cylinders <= 1024 && (pbc != lbc || pbh != lbh || pbs != lbs)) { printf("Partition %u has different physical/logical " "beginnings (non-Linux?):\n", partition + 1); printf(" phys=(%u, %u, %u) ", pbc, pbh, pbs); printf("logical=(%u, %u, %u)\n", lbc, lbh, lbs); } /* Same physical / logical ending? */ if (g_cylinders <= 1024 && (pec != lec || peh != leh || pes != les)) { printf("Partition %u has different physical/logical " "endings:\n", partition + 1); printf(" phys=(%u, %u, %u) ", pec, peh, pes); printf("logical=(%u, %u, %u)\n", lec, leh, les); } /* Ending on cylinder boundary? */ if (peh != (g_heads - 1) || pes != g_sectors) { printf("Partition %u does not end on cylinder boundary\n", partition + 1); } } static void list_disk_geometry(void) { ullong bytes = ((ullong)total_number_of_sectors << 9); long megabytes = bytes / 1000000; if (megabytes < 10000) printf("\nDisk %s: %lu MB, %llu bytes\n", disk_device, megabytes, bytes); else printf("\nDisk %s: %lu.%lu GB, %llu bytes\n", disk_device, megabytes/1000, (megabytes/100)%10, bytes); printf("%u heads, %u sectors/track, %u cylinders", g_heads, g_sectors, g_cylinders); if (units_per_sector == 1) printf(", total %"SECT_FMT"u sectors", total_number_of_sectors / (sector_size/512)); printf("\nUnits = %s of %u * %u = %u bytes\n\n", str_units(PLURAL), units_per_sector, sector_size, units_per_sector * sector_size); } /* * Check whether partition entries are ordered by their starting positions. * Return 0 if OK. Return i if partition i should have been earlier. * Two separate checks: primary and logical partitions. */ static int wrong_p_order(int *prev) { const struct pte *pe; const struct partition *p; sector_t last_p_start_pos = 0, p_start_pos; unsigned i, last_i = 0; for (i = 0; i < g_partitions; i++) { if (i == 4) { last_i = 4; last_p_start_pos = 0; } pe = &ptes[i]; p = pe->part_table; if (p->sys_ind) { p_start_pos = get_partition_start_from_dev_start(pe); if (last_p_start_pos > p_start_pos) { if (prev) *prev = last_i; return i; } last_p_start_pos = p_start_pos; last_i = i; } } return 0; } #if ENABLE_FEATURE_FDISK_ADVANCED /* * Fix the chain of logicals. * extended_offset is unchanged, the set of sectors used is unchanged * The chain is sorted so that sectors increase, and so that * starting sectors increase. * * After this it may still be that cfdisk doesnt like the table. * (This is because cfdisk considers expanded parts, from link to * end of partition, and these may still overlap.) * Now * sfdisk /dev/hda > ohda; sfdisk /dev/hda < ohda * may help. */ static void fix_chain_of_logicals(void) { int j, oj, ojj, sj, sjj; struct partition *pj,*pjj,tmp; /* Stage 1: sort sectors but leave sector of part 4 */ /* (Its sector is the global extended_offset.) */ stage1: for (j = 5; j < g_partitions - 1; j++) { oj = ptes[j].offset_from_dev_start; ojj = ptes[j+1].offset_from_dev_start; if (oj > ojj) { ptes[j].offset_from_dev_start = ojj; ptes[j+1].offset_from_dev_start = oj; pj = ptes[j].part_table; set_start_sect(pj, get_start_sect(pj)+oj-ojj); pjj = ptes[j+1].part_table; set_start_sect(pjj, get_start_sect(pjj)+ojj-oj); set_start_sect(ptes[j-1].ext_pointer, ojj-extended_offset); set_start_sect(ptes[j].ext_pointer, oj-extended_offset); goto stage1; } } /* Stage 2: sort starting sectors */ stage2: for (j = 4; j < g_partitions - 1; j++) { pj = ptes[j].part_table; pjj = ptes[j+1].part_table; sj = get_start_sect(pj); sjj = get_start_sect(pjj); oj = ptes[j].offset_from_dev_start; ojj = ptes[j+1].offset_from_dev_start; if (oj+sj > ojj+sjj) { tmp = *pj; *pj = *pjj; *pjj = tmp; set_start_sect(pj, ojj+sjj-oj); set_start_sect(pjj, oj+sj-ojj); goto stage2; } } /* Probably something was changed */ for (j = 4; j < g_partitions; j++) ptes[j].changed = 1; } static void fix_partition_table_order(void) { struct pte *pei, *pek; int i,k; if (!wrong_p_order(NULL)) { printf("Ordering is already correct\n\n"); return; } while ((i = wrong_p_order(&k)) != 0 && i < 4) { /* partition i should have come earlier, move it */ /* We have to move data in the MBR */ struct partition *pi, *pk, *pe, pbuf; pei = &ptes[i]; pek = &ptes[k]; pe = pei->ext_pointer; pei->ext_pointer = pek->ext_pointer; pek->ext_pointer = pe; pi = pei->part_table; pk = pek->part_table; memmove(&pbuf, pi, sizeof(struct partition)); memmove(pi, pk, sizeof(struct partition)); memmove(pk, &pbuf, sizeof(struct partition)); pei->changed = pek->changed = 1; } if (i) fix_chain_of_logicals(); printf("Done.\n"); } #endif static void list_table(int xtra) { const struct partition *p; int i, w; if (LABEL_IS_SUN) { sun_list_table(xtra); return; } if (LABEL_IS_SGI) { sgi_list_table(xtra); return; } if (LABEL_IS_GPT) { gpt_list_table(xtra); return; } list_disk_geometry(); if (LABEL_IS_OSF) { xbsd_print_disklabel(xtra); return; } /* Heuristic: we list partition 3 of /dev/foo as /dev/foo3, but if the device name ends in a digit, say /dev/foo1, then the partition is called /dev/foo1p3. */ w = strlen(disk_device); if (w && isdigit(disk_device[w-1])) w++; if (w < 5) w = 5; // 1 12345678901 12345678901 12345678901 12 printf("%*s Boot Start End Blocks Id System\n", w+1, "Device"); for (i = 0; i < g_partitions; i++) { const struct pte *pe = &ptes[i]; sector_t psects; sector_t pblocks; unsigned podd; p = pe->part_table; if (!p || is_cleared_partition(p)) continue; psects = get_nr_sects(p); pblocks = psects; podd = 0; if (sector_size < 1024) { pblocks /= (1024 / sector_size); podd = psects % (1024 / sector_size); } if (sector_size > 1024) pblocks *= (sector_size / 1024); printf("%s %c %11"SECT_FMT"u %11"SECT_FMT"u %11"SECT_FMT"u%c %2x %s\n", partname(disk_device, i+1, w+2), !p->boot_ind ? ' ' : p->boot_ind == ACTIVE_FLAG /* boot flag */ ? '*' : '?', cround(get_partition_start_from_dev_start(pe)), /* start */ cround(get_partition_start_from_dev_start(pe) + psects /* end */ - (psects ? 1 : 0)), pblocks, podd ? '+' : ' ', /* odd flag on end */ p->sys_ind, /* type id */ partition_type(p->sys_ind)); /* type name */ check_consistency(p, i); } /* Is partition table in disk order? It need not be, but... */ /* partition table entries are not checked for correct order * if this is a sgi, sun or aix labeled disk... */ if (LABEL_IS_DOS && wrong_p_order(NULL)) { /* FIXME */ printf("\nPartition table entries are not in disk order\n"); } } #if ENABLE_FEATURE_FDISK_ADVANCED static void x_list_table(int extend) { const struct pte *pe; const struct partition *p; int i; printf("\nDisk %s: %u heads, %u sectors, %u cylinders\n\n", disk_device, g_heads, g_sectors, g_cylinders); printf("Nr AF Hd Sec Cyl Hd Sec Cyl Start Size ID\n"); for (i = 0; i < g_partitions; i++) { pe = &ptes[i]; p = (extend ? pe->ext_pointer : pe->part_table); if (p != NULL) { printf("%2u %02x%4u%4u%5u%4u%4u%5u%11"SECT_FMT"u%11"SECT_FMT"u %02x\n", i + 1, p->boot_ind, p->head, sector(p->sector), cylinder(p->sector, p->cyl), p->end_head, sector(p->end_sector), cylinder(p->end_sector, p->end_cyl), get_start_sect(p), get_nr_sects(p), p->sys_ind); if (p->sys_ind) check_consistency(p, i); } } } #endif #if ENABLE_FEATURE_FDISK_WRITABLE static void fill_bounds(sector_t *first, sector_t *last) { unsigned i; const struct pte *pe = &ptes[0]; const struct partition *p; for (i = 0; i < g_partitions; pe++,i++) { p = pe->part_table; if (!p->sys_ind || IS_EXTENDED(p->sys_ind)) { first[i] = 0xffffffff; last[i] = 0; } else { first[i] = get_partition_start_from_dev_start(pe); last[i] = first[i] + get_nr_sects(p) - 1; } } } static void check(int n, unsigned h, unsigned s, unsigned c, sector_t start) { sector_t total, real_s, real_c; real_s = sector(s) - 1; real_c = cylinder(s, c); total = (real_c * g_sectors + real_s) * g_heads + h; if (!total) printf("Partition %u contains sector 0\n", n); if (h >= g_heads) printf("Partition %u: head %u greater than maximum %u\n", n, h + 1, g_heads); if (real_s >= g_sectors) printf("Partition %u: sector %u greater than " "maximum %u\n", n, s, g_sectors); if (real_c >= g_cylinders) printf("Partition %u: cylinder %"SECT_FMT"u greater than " "maximum %u\n", n, real_c + 1, g_cylinders); if (g_cylinders <= 1024 && start != total) printf("Partition %u: previous sectors %"SECT_FMT"u disagrees with " "total %"SECT_FMT"u\n", n, start, total); } static void verify(void) { int i, j; sector_t total = 1; sector_t first[g_partitions], last[g_partitions]; struct partition *p; if (warn_geometry()) return; if (LABEL_IS_SUN) { verify_sun(); return; } if (LABEL_IS_SGI) { verify_sgi(1); return; } fill_bounds(first, last); for (i = 0; i < g_partitions; i++) { struct pte *pe = &ptes[i]; p = pe->part_table; if (p->sys_ind && !IS_EXTENDED(p->sys_ind)) { check_consistency(p, i); if (get_partition_start_from_dev_start(pe) < first[i]) printf("Warning: bad start-of-data in " "partition %u\n", i + 1); check(i + 1, p->end_head, p->end_sector, p->end_cyl, last[i]); total += last[i] + 1 - first[i]; for (j = 0; j < i; j++) { if ((first[i] >= first[j] && first[i] <= last[j]) || ((last[i] <= last[j] && last[i] >= first[j]))) { printf("Warning: partition %u overlaps " "partition %u\n", j + 1, i + 1); total += first[i] >= first[j] ? first[i] : first[j]; total -= last[i] <= last[j] ? last[i] : last[j]; } } } } if (extended_offset) { struct pte *pex = &ptes[ext_index]; sector_t e_last = get_start_sect(pex->part_table) + get_nr_sects(pex->part_table) - 1; for (i = 4; i < g_partitions; i++) { total++; p = ptes[i].part_table; if (!p->sys_ind) { if (i != 4 || i + 1 < g_partitions) printf("Warning: partition %u " "is empty\n", i + 1); } else if (first[i] < extended_offset || last[i] > e_last) { printf("Logical partition %u not entirely in " "partition %u\n", i + 1, ext_index + 1); } } } if (total > g_heads * g_sectors * g_cylinders) printf("Total allocated sectors %u greater than the maximum " "%u\n", total, g_heads * g_sectors * g_cylinders); else { total = g_heads * g_sectors * g_cylinders - total; if (total != 0) printf("%"SECT_FMT"u unallocated sectors\n", total); } } static void add_partition(int n, int sys) { char mesg[256]; /* 48 does not suffice in Japanese */ int i, num_read = 0; struct partition *p = ptes[n].part_table; struct partition *q = ptes[ext_index].part_table; sector_t limit, temp; sector_t start, stop = 0; sector_t first[g_partitions], last[g_partitions]; if (p && p->sys_ind) { printf(msg_part_already_defined, n + 1); return; } fill_bounds(first, last); if (n < 4) { start = sector_offset; if (display_in_cyl_units || !total_number_of_sectors) limit = (sector_t) g_heads * g_sectors * g_cylinders - 1; else limit = total_number_of_sectors - 1; if (extended_offset) { first[ext_index] = extended_offset; last[ext_index] = get_start_sect(q) + get_nr_sects(q) - 1; } } else { start = extended_offset + sector_offset; limit = get_start_sect(q) + get_nr_sects(q) - 1; } if (display_in_cyl_units) for (i = 0; i < g_partitions; i++) first[i] = (cround(first[i]) - 1) * units_per_sector; snprintf(mesg, sizeof(mesg), "First %s", str_units(SINGULAR)); do { temp = start; for (i = 0; i < g_partitions; i++) { int lastplusoff; if (start == ptes[i].offset_from_dev_start) start += sector_offset; lastplusoff = last[i] + ((n < 4) ? 0 : sector_offset); if (start >= first[i] && start <= lastplusoff) start = lastplusoff + 1; } if (start > limit) break; if (start >= temp+units_per_sector && num_read) { printf("Sector %"SECT_FMT"u is already allocated\n", temp); temp = start; num_read = 0; } if (!num_read && start == temp) { sector_t saved_start; saved_start = start; start = read_int(cround(saved_start), cround(saved_start), cround(limit), 0, mesg); if (display_in_cyl_units) { start = (start - 1) * units_per_sector; if (start < saved_start) start = saved_start; } num_read = 1; } } while (start != temp || !num_read); if (n > 4) { /* NOT for fifth partition */ struct pte *pe = &ptes[n]; pe->offset_from_dev_start = start - sector_offset; if (pe->offset_from_dev_start == extended_offset) { /* must be corrected */ pe->offset_from_dev_start++; if (sector_offset == 1) start++; } } for (i = 0; i < g_partitions; i++) { struct pte *pe = &ptes[i]; if (start < pe->offset_from_dev_start && limit >= pe->offset_from_dev_start) limit = pe->offset_from_dev_start - 1; if (start < first[i] && limit >= first[i]) limit = first[i] - 1; } if (start > limit) { printf("No free sectors available\n"); if (n > 4) g_partitions--; return; } if (cround(start) == cround(limit)) { stop = limit; } else { snprintf(mesg, sizeof(mesg), "Last %s or +size or +sizeM or +sizeK", str_units(SINGULAR)); stop = read_int(cround(start), cround(limit), cround(limit), cround(start), mesg); if (display_in_cyl_units) { stop = stop * units_per_sector - 1; if (stop >limit) stop = limit; } } set_partition(n, 0, start, stop, sys); if (n > 4) set_partition(n - 1, 1, ptes[n].offset_from_dev_start, stop, EXTENDED); if (IS_EXTENDED(sys)) { struct pte *pe4 = &ptes[4]; struct pte *pen = &ptes[n]; ext_index = n; pen->ext_pointer = p; pe4->offset_from_dev_start = extended_offset = start; pe4->sectorbuffer = xzalloc(sector_size); pe4->part_table = pt_offset(pe4->sectorbuffer, 0); pe4->ext_pointer = pe4->part_table + 1; pe4->changed = 1; g_partitions = 5; } } static void add_logical(void) { if (g_partitions > 5 || ptes[4].part_table->sys_ind) { struct pte *pe = &ptes[g_partitions]; pe->sectorbuffer = xzalloc(sector_size); pe->part_table = pt_offset(pe->sectorbuffer, 0); pe->ext_pointer = pe->part_table + 1; pe->offset_from_dev_start = 0; pe->changed = 1; g_partitions++; } add_partition(g_partitions - 1, LINUX_NATIVE); } static void new_partition(void) { int i, free_primary = 0; if (warn_geometry()) return; if (LABEL_IS_SUN) { add_sun_partition(get_partition(0, g_partitions), LINUX_NATIVE); return; } if (LABEL_IS_SGI) { sgi_add_partition(get_partition(0, g_partitions), LINUX_NATIVE); return; } if (LABEL_IS_AIX) { printf("Sorry - this fdisk cannot handle AIX disk labels.\n" "If you want to add DOS-type partitions, create a new empty DOS partition\n" "table first (use 'o'). This will destroy the present disk contents.\n"); return; } for (i = 0; i < 4; i++) free_primary += !ptes[i].part_table->sys_ind; if (!free_primary && g_partitions >= MAXIMUM_PARTS) { printf("The maximum number of partitions has been created\n"); return; } if (!free_primary) { if (extended_offset) add_logical(); else printf("You must delete some partition and add " "an extended partition first\n"); } else { char c, line[80]; snprintf(line, sizeof(line), "Command action\n" " %s\n" " p primary partition (1-4)\n", (extended_offset ? "l logical (5 or over)" : "e extended")); while (1) { c = read_nonempty(line); if ((c | 0x20) == 'p') { i = get_nonexisting_partition(0, 4); if (i >= 0) add_partition(i, LINUX_NATIVE); return; } if (c == 'l' && extended_offset) { add_logical(); return; } if (c == 'e' && !extended_offset) { i = get_nonexisting_partition(0, 4); if (i >= 0) add_partition(i, EXTENDED); return; } printf("Invalid partition number " "for type '%c'\n", c); } } } static void reread_partition_table(int leave) { int i; printf("Calling ioctl() to re-read partition table\n"); sync(); /* Users with slow external USB disks on a 320MHz ARM system (year 2011) * report that sleep is needed, otherwise BLKRRPART may fail with -EIO: */ sleep(1); i = ioctl_or_perror(dev_fd, BLKRRPART, NULL, "WARNING: rereading partition table " "failed, kernel still uses old table"); #if 0 if (dos_changed) printf( "\nWARNING: If you have created or modified any DOS 6.x\n" "partitions, please see the fdisk manual page for additional\n" "information\n"); #endif if (leave) { if (ENABLE_FEATURE_CLEAN_UP) close_dev_fd(); exit(i != 0); } } static void write_table(void) { int i; if (LABEL_IS_DOS) { for (i = 0; i < 3; i++) if (ptes[i].changed) ptes[3].changed = 1; for (i = 3; i < g_partitions; i++) { struct pte *pe = &ptes[i]; if (pe->changed) { write_part_table_flag(pe->sectorbuffer); write_sector(pe->offset_from_dev_start, pe->sectorbuffer); } } } else if (LABEL_IS_SGI) { /* no test on change? the printf below might be mistaken */ sgi_write_table(); } else if (LABEL_IS_SUN) { for (i = 0; i < 8; i++) { if (ptes[i].changed) { sun_write_table(); break; } } } printf("The partition table has been altered.\n"); reread_partition_table(1); } #endif /* FEATURE_FDISK_WRITABLE */ #if ENABLE_FEATURE_FDISK_ADVANCED #define MAX_PER_LINE 16 static void print_buffer(char *pbuffer) { int i,l; for (i = 0, l = 0; i < sector_size; i++, l++) { if (l == 0) printf("0x%03X:", i); printf(" %02X", (unsigned char) pbuffer[i]); if (l == MAX_PER_LINE - 1) { bb_putchar('\n'); l = -1; } } if (l > 0) bb_putchar('\n'); bb_putchar('\n'); } static void print_raw(void) { int i; printf("Device: %s\n", disk_device); if (LABEL_IS_SGI || LABEL_IS_SUN) print_buffer(MBRbuffer); else { for (i = 3; i < g_partitions; i++) print_buffer(ptes[i].sectorbuffer); } } static void move_begin(unsigned i) { struct pte *pe = &ptes[i]; struct partition *p = pe->part_table; sector_t new, first, nr_sects; if (warn_geometry()) return; nr_sects = get_nr_sects(p); if (!p->sys_ind || !nr_sects || IS_EXTENDED(p->sys_ind)) { printf("Partition %u has no data area\n", i + 1); return; } first = get_partition_start_from_dev_start(pe); /* == pe->offset_from_dev_start + get_start_sect(p) */ new = read_int(0 /*was:first*/, first, first + nr_sects - 1, first, "New beginning of data"); if (new != first) { sector_t new_relative = new - pe->offset_from_dev_start; nr_sects += (get_start_sect(p) - new_relative); set_start_sect(p, new_relative); set_nr_sects(p, nr_sects); read_nonempty("Recalculate C/H/S values? (Y/N): "); if ((line_ptr[0] | 0x20) == 'y') set_hsc_start_end(p, new, new + nr_sects - 1); pe->changed = 1; } } static void xselect(void) { char c; while (1) { bb_putchar('\n'); c = 0x20 | read_nonempty("Expert command (m for help): "); switch (c) { case 'a': if (LABEL_IS_SUN) sun_set_alt_cyl(); break; case 'b': if (LABEL_IS_DOS) move_begin(get_partition(0, g_partitions)); break; case 'c': user_cylinders = g_cylinders = read_int(1, g_cylinders, 1048576, 0, "Number of cylinders"); if (LABEL_IS_SUN) sun_set_ncyl(g_cylinders); if (LABEL_IS_DOS) warn_cylinders(); break; case 'd': print_raw(); break; case 'e': if (LABEL_IS_SGI) sgi_set_xcyl(); else if (LABEL_IS_SUN) sun_set_xcyl(); else if (LABEL_IS_DOS) x_list_table(1); break; case 'f': if (LABEL_IS_DOS) fix_partition_table_order(); break; case 'g': #if ENABLE_FEATURE_SGI_LABEL create_sgilabel(); #endif break; case 'h': user_heads = g_heads = read_int(1, g_heads, 256, 0, "Number of heads"); update_units(); break; case 'i': if (LABEL_IS_SUN) sun_set_ilfact(); break; case 'o': if (LABEL_IS_SUN) sun_set_rspeed(); break; case 'p': if (LABEL_IS_SUN) list_table(1); else x_list_table(0); break; case 'q': if (ENABLE_FEATURE_CLEAN_UP) close_dev_fd(); bb_putchar('\n'); exit(EXIT_SUCCESS); case 'r': return; case 's': user_sectors = g_sectors = read_int(1, g_sectors, 63, 0, "Number of sectors"); if (dos_compatible_flag) { sector_offset = g_sectors; printf("Warning: setting sector offset for DOS " "compatiblity\n"); } update_units(); break; case 'v': verify(); break; case 'w': write_table(); /* does not return */ break; case 'y': if (LABEL_IS_SUN) sun_set_pcylcount(); break; default: xmenu(); } } } #endif /* ADVANCED mode */ static int is_ide_cdrom_or_tape(const char *device) { FILE *procf; char buf[100]; struct stat statbuf; int is_ide = 0; /* No device was given explicitly, and we are trying some likely things. But opening /dev/hdc may produce errors like "hdc: tray open or drive not ready" if it happens to be a CD-ROM drive. It even happens that the process hangs on the attempt to read a music CD. So try to be careful. This only works since 2.1.73. */ if (strncmp("/dev/hd", device, 7)) return 0; snprintf(buf, sizeof(buf), "/proc/ide/%s/media", device+5); procf = fopen_for_read(buf); if (procf != NULL && fgets(buf, sizeof(buf), procf)) is_ide = (!strncmp(buf, "cdrom", 5) || !strncmp(buf, "tape", 4)); else /* Now when this proc file does not exist, skip the device when it is read-only. */ if (stat(device, &statbuf) == 0) is_ide = ((statbuf.st_mode & 0222) == 0); if (procf) fclose(procf); return is_ide; } static void open_list_and_close(const char *device, int user_specified) { int gb; disk_device = device; if (setjmp(listingbuf)) return; if (!user_specified) if (is_ide_cdrom_or_tape(device)) return; /* Open disk_device, save file descriptor to dev_fd */ errno = 0; gb = get_boot(TRY_ONLY); if (gb > 0) { /* I/O error */ /* Ignore other errors, since we try IDE and SCSI hard disks which may not be installed on the system. */ if (user_specified || errno == EACCES) bb_perror_msg("can't open '%s'", device); return; } if (gb < 0) { /* no DOS signature */ list_disk_geometry(); if (LABEL_IS_AIX) goto ret; #if ENABLE_FEATURE_OSF_LABEL if (bsd_trydev(device) < 0) #endif printf("Disk %s doesn't contain a valid " "partition table\n", device); } else { list_table(0); #if ENABLE_FEATURE_FDISK_WRITABLE if (!LABEL_IS_SUN && g_partitions > 4) { delete_partition(ext_index); } #endif } ret: close_dev_fd(); } /* Is it a whole disk? The digit check is still useful for Xen devices for example. */ static int is_whole_disk(const char *disk) { unsigned len; int fd = open(disk, O_RDONLY); if (fd != -1) { struct hd_geometry geometry; int err = ioctl(fd, HDIO_GETGEO, &geometry); close(fd); if (!err) return (geometry.start == 0); } /* Treat "nameN" as a partition name, not whole disk */ /* note: mmcblk0 should work from the geometry check above */ len = strlen(disk); if (len != 0 && isdigit(disk[len - 1])) return 0; return 1; } /* for fdisk -l: try all things in /proc/partitions that look like a partition name (do not end in a digit) */ static void list_devs_in_proc_partititons(void) { FILE *procpt; char line[100], ptname[100], devname[120]; int ma, mi, sz; procpt = fopen_or_warn("/proc/partitions", "r"); while (fgets(line, sizeof(line), procpt)) { if (sscanf(line, " %u %u %u %[^\n ]", &ma, &mi, &sz, ptname) != 4) continue; sprintf(devname, "/dev/%s", ptname); if (is_whole_disk(devname)) open_list_and_close(devname, 0); } #if ENABLE_FEATURE_CLEAN_UP fclose(procpt); #endif } #if ENABLE_FEATURE_FDISK_WRITABLE static void unknown_command(int c) { printf("%c: unknown command\n", c); } #endif int fdisk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int fdisk_main(int argc UNUSED_PARAM, char **argv) { unsigned opt; /* * fdisk -v * fdisk -l [-b sectorsize] [-u] device ... * fdisk -s [partition] ... * fdisk [-b sectorsize] [-u] device * * Options -C, -H, -S set the geometry. */ INIT_G(); close_dev_fd(); /* needed: fd 3 must not stay closed */ opt_complementary = "b+:C+:H+:S+"; /* numeric params */ opt = getopt32(argv, "b:C:H:lS:u" IF_FEATURE_FDISK_BLKSIZE("s"), §or_size, &user_cylinders, &user_heads, &user_sectors); argv += optind; if (opt & OPT_b) { /* Ugly: this sector size is really per device, * so cannot be combined with multiple disks, * and the same goes for the C/H/S options. */ if (sector_size < 512 || sector_size > 0x10000 || (sector_size & (sector_size-1)) /* not power of 2 */ ) { bb_show_usage(); } sector_offset = 2; user_set_sector_size = 1; } if (user_heads <= 0 || user_heads >= 256) user_heads = 0; if (user_sectors <= 0 || user_sectors >= 64) user_sectors = 0; if (opt & OPT_u) display_in_cyl_units = 0; // -u #if ENABLE_FEATURE_FDISK_WRITABLE if (opt & OPT_l) { nowarn = 1; #endif if (*argv) { listing = 1; do { open_list_and_close(*argv, 1); } while (*++argv); } else { /* we don't have device names, */ /* use /proc/partitions instead */ list_devs_in_proc_partititons(); } return 0; #if ENABLE_FEATURE_FDISK_WRITABLE } #endif #if ENABLE_FEATURE_FDISK_BLKSIZE if (opt & OPT_s) { int j; nowarn = 1; if (!argv[0]) bb_show_usage(); for (j = 0; argv[j]; j++) { unsigned long long size; fd = xopen(argv[j], O_RDONLY); size = bb_BLKGETSIZE_sectors(fd) / 2; close(fd); if (argv[1]) printf("%llu\n", size); else printf("%s: %llu\n", argv[j], size); } return 0; } #endif #if ENABLE_FEATURE_FDISK_WRITABLE if (!argv[0] || argv[1]) bb_show_usage(); disk_device = argv[0]; get_boot(OPEN_MAIN); if (LABEL_IS_OSF) { /* OSF label, and no DOS label */ printf("Detected an OSF/1 disklabel on %s, entering " "disklabel mode\n", disk_device); bsd_select(); /*Why do we do this? It seems to be counter-intuitive*/ current_label_type = LABEL_DOS; /* If we return we may want to make an empty DOS label? */ } while (1) { int c; bb_putchar('\n'); c = 0x20 | read_nonempty("Command (m for help): "); switch (c) { case 'a': if (LABEL_IS_DOS) toggle_active(get_partition(1, g_partitions)); else if (LABEL_IS_SUN) toggle_sunflags(get_partition(1, g_partitions), 0x01); else if (LABEL_IS_SGI) sgi_set_bootpartition( get_partition(1, g_partitions)); else unknown_command(c); break; case 'b': if (LABEL_IS_SGI) { printf("\nThe current boot file is: %s\n", sgi_get_bootfile()); if (read_maybe_empty("Please enter the name of the " "new boot file: ") == '\n') printf("Boot file unchanged\n"); else sgi_set_bootfile(line_ptr); } #if ENABLE_FEATURE_OSF_LABEL else bsd_select(); #endif break; case 'c': if (LABEL_IS_DOS) toggle_dos_compatibility_flag(); else if (LABEL_IS_SUN) toggle_sunflags(get_partition(1, g_partitions), 0x10); else if (LABEL_IS_SGI) sgi_set_swappartition( get_partition(1, g_partitions)); else unknown_command(c); break; case 'd': { int j; /* If sgi_label then don't use get_existing_partition, let the user select a partition, since get_existing_partition() only works for Linux-like partition tables */ if (!LABEL_IS_SGI) { j = get_existing_partition(1, g_partitions); } else { j = get_partition(1, g_partitions); } if (j >= 0) delete_partition(j); } break; case 'i': if (LABEL_IS_SGI) create_sgiinfo(); else unknown_command(c); case 'l': list_types(get_sys_types()); break; case 'm': menu(); break; case 'n': new_partition(); break; case 'o': create_doslabel(); break; case 'p': list_table(0); break; case 'q': if (ENABLE_FEATURE_CLEAN_UP) close_dev_fd(); bb_putchar('\n'); return 0; case 's': #if ENABLE_FEATURE_SUN_LABEL create_sunlabel(); #endif break; case 't': change_sysid(); break; case 'u': change_units(); break; case 'v': verify(); break; case 'w': write_table(); /* does not return */ break; #if ENABLE_FEATURE_FDISK_ADVANCED case 'x': if (LABEL_IS_SGI) { printf("\n\tSorry, no experts menu for SGI " "partition tables available\n\n"); } else xselect(); break; #endif default: unknown_command(c); menu(); } } return 0; #endif /* FEATURE_FDISK_WRITABLE */ }