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ccb070450e
Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
3079 lines
76 KiB
C
3079 lines
76 KiB
C
/* vi: set sw=4 ts=4: */
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/* fdisk.c -- Partition table manipulator for Linux.
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*
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* Copyright (C) 1992 A. V. Le Blanc (LeBlanc@mcc.ac.uk)
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* Copyright (C) 2001,2002 Vladimir Oleynik <dzo@simtreas.ru> (initial bb port)
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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#ifndef _LARGEFILE64_SOURCE
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/* For lseek64 */
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# define _LARGEFILE64_SOURCE
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#endif
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#include <assert.h> /* assert */
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#include <sys/mount.h>
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#if !defined(BLKSSZGET)
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# define BLKSSZGET _IO(0x12, 104)
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#endif
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#if !defined(BLKGETSIZE64)
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# define BLKGETSIZE64 _IOR(0x12,114,size_t)
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#endif
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#include "libbb.h"
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#if BB_LITTLE_ENDIAN
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# define inline_if_little_endian ALWAYS_INLINE
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#else
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# define inline_if_little_endian /* nothing */
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#endif
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/* Looks like someone forgot to add this to config system */
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#ifndef ENABLE_FEATURE_FDISK_BLKSIZE
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# define ENABLE_FEATURE_FDISK_BLKSIZE 0
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# define IF_FEATURE_FDISK_BLKSIZE(a)
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#endif
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#define DEFAULT_SECTOR_SIZE 512
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#define DEFAULT_SECTOR_SIZE_STR "512"
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#define MAX_SECTOR_SIZE 2048
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#define SECTOR_SIZE 512 /* still used in osf/sgi/sun code */
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#define MAXIMUM_PARTS 60
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#define ACTIVE_FLAG 0x80
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#define EXTENDED 0x05
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#define WIN98_EXTENDED 0x0f
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#define LINUX_PARTITION 0x81
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#define LINUX_SWAP 0x82
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#define LINUX_NATIVE 0x83
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#define LINUX_EXTENDED 0x85
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#define LINUX_LVM 0x8e
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#define LINUX_RAID 0xfd
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enum {
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OPT_b = 1 << 0,
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OPT_C = 1 << 1,
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OPT_H = 1 << 2,
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OPT_l = 1 << 3,
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OPT_S = 1 << 4,
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OPT_u = 1 << 5,
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OPT_s = (1 << 6) * ENABLE_FEATURE_FDISK_BLKSIZE,
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};
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typedef unsigned long long ullong;
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/* Used for sector numbers. Partition formats we know
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* do not support more than 2^32 sectors
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*/
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typedef uint32_t sector_t;
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#if UINT_MAX == 4294967295
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# define SECT_FMT ""
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#elif ULONG_MAX == 4294967295
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# define SECT_FMT "l"
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#else
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# error Cant detect sizeof(uint32_t)
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#endif
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struct hd_geometry {
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unsigned char heads;
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unsigned char sectors;
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unsigned short cylinders;
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unsigned long start;
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};
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#define HDIO_GETGEO 0x0301 /* get device geometry */
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static const char msg_building_new_label[] ALIGN1 =
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"Building a new %s. Changes will remain in memory only,\n"
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"until you decide to write them. After that the previous content\n"
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"won't be recoverable.\n\n";
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static const char msg_part_already_defined[] ALIGN1 =
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"Partition %u is already defined, delete it before re-adding\n";
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struct partition {
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unsigned char boot_ind; /* 0x80 - active */
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unsigned char head; /* starting head */
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unsigned char sector; /* starting sector */
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unsigned char cyl; /* starting cylinder */
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unsigned char sys_ind; /* what partition type */
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unsigned char end_head; /* end head */
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unsigned char end_sector; /* end sector */
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unsigned char end_cyl; /* end cylinder */
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unsigned char start4[4]; /* starting sector counting from 0 */
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unsigned char size4[4]; /* nr of sectors in partition */
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} PACKED;
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/*
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* per partition table entry data
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*
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* The four primary partitions have the same sectorbuffer (MBRbuffer)
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* and have NULL ext_pointer.
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* Each logical partition table entry has two pointers, one for the
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* partition and one link to the next one.
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*/
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struct pte {
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struct partition *part_table; /* points into sectorbuffer */
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struct partition *ext_pointer; /* points into sectorbuffer */
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sector_t offset_from_dev_start; /* disk sector number */
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char *sectorbuffer; /* disk sector contents */
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#if ENABLE_FEATURE_FDISK_WRITABLE
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char changed; /* boolean */
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#endif
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};
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#define unable_to_open "can't open '%s'"
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#define unable_to_read "can't read from %s"
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#define unable_to_seek "can't seek on %s"
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enum label_type {
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LABEL_DOS, LABEL_SUN, LABEL_SGI, LABEL_AIX, LABEL_OSF, LABEL_GPT
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};
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#define LABEL_IS_DOS (LABEL_DOS == current_label_type)
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#if ENABLE_FEATURE_SUN_LABEL
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#define LABEL_IS_SUN (LABEL_SUN == current_label_type)
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#define STATIC_SUN static
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#else
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#define LABEL_IS_SUN 0
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#define STATIC_SUN extern
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#endif
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#if ENABLE_FEATURE_SGI_LABEL
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#define LABEL_IS_SGI (LABEL_SGI == current_label_type)
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#define STATIC_SGI static
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#else
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#define LABEL_IS_SGI 0
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#define STATIC_SGI extern
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#endif
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#if ENABLE_FEATURE_AIX_LABEL
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#define LABEL_IS_AIX (LABEL_AIX == current_label_type)
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#define STATIC_AIX static
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#else
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#define LABEL_IS_AIX 0
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#define STATIC_AIX extern
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#endif
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#if ENABLE_FEATURE_OSF_LABEL
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#define LABEL_IS_OSF (LABEL_OSF == current_label_type)
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#define STATIC_OSF static
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#else
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#define LABEL_IS_OSF 0
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#define STATIC_OSF extern
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#endif
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#if ENABLE_FEATURE_GPT_LABEL
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#define LABEL_IS_GPT (LABEL_GPT == current_label_type)
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#define STATIC_GPT static
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#else
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#define LABEL_IS_GPT 0
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#define STATIC_GPT extern
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#endif
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enum action { OPEN_MAIN, TRY_ONLY, CREATE_EMPTY_DOS, CREATE_EMPTY_SUN };
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static void update_units(void);
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#if ENABLE_FEATURE_FDISK_WRITABLE
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static void change_units(void);
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static void reread_partition_table(int leave);
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static void delete_partition(int i);
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static unsigned get_partition(int warn, unsigned max);
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static void list_types(const char *const *sys);
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static sector_t read_int(sector_t low, sector_t dflt, sector_t high, sector_t base, const char *mesg);
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#endif
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static const char *partition_type(unsigned char type);
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static void get_geometry(void);
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static void read_pte(struct pte *pe, sector_t offset);
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#if ENABLE_FEATURE_SUN_LABEL || ENABLE_FEATURE_FDISK_WRITABLE
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static int get_boot(enum action what);
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#else
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static int get_boot(void);
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#endif
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#define PLURAL 0
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#define SINGULAR 1
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static sector_t get_start_sect(const struct partition *p);
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static sector_t get_nr_sects(const struct partition *p);
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/* DOS partition types */
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static const char *const i386_sys_types[] = {
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"\x00" "Empty",
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"\x01" "FAT12",
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"\x04" "FAT16 <32M",
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"\x05" "Extended", /* DOS 3.3+ extended partition */
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"\x06" "FAT16", /* DOS 16-bit >=32M */
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"\x07" "HPFS/NTFS", /* OS/2 IFS, eg, HPFS or NTFS or QNX */
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"\x0a" "OS/2 Boot Manager",/* OS/2 Boot Manager */
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"\x0b" "Win95 FAT32",
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"\x0c" "Win95 FAT32 (LBA)",/* LBA really is 'Extended Int 13h' */
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"\x0e" "Win95 FAT16 (LBA)",
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"\x0f" "Win95 Ext'd (LBA)",
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"\x11" "Hidden FAT12",
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"\x12" "Compaq diagnostics",
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"\x14" "Hidden FAT16 <32M",
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"\x16" "Hidden FAT16",
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"\x17" "Hidden HPFS/NTFS",
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"\x1b" "Hidden Win95 FAT32",
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"\x1c" "Hidden W95 FAT32 (LBA)",
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"\x1e" "Hidden W95 FAT16 (LBA)",
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"\x3c" "Part.Magic recovery",
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"\x41" "PPC PReP Boot",
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"\x42" "SFS",
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"\x63" "GNU HURD or SysV", /* GNU HURD or Mach or Sys V/386 (such as ISC UNIX) */
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"\x80" "Old Minix", /* Minix 1.4a and earlier */
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"\x81" "Minix / old Linux",/* Minix 1.4b and later */
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"\x82" "Linux swap", /* also Solaris */
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"\x83" "Linux",
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"\x84" "OS/2 hidden C: drive",
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"\x85" "Linux extended",
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"\x86" "NTFS volume set",
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"\x87" "NTFS volume set",
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"\x8e" "Linux LVM",
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"\x9f" "BSD/OS", /* BSDI */
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"\xa0" "Thinkpad hibernation",
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"\xa5" "FreeBSD", /* various BSD flavours */
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"\xa6" "OpenBSD",
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"\xa8" "Darwin UFS",
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"\xa9" "NetBSD",
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"\xab" "Darwin boot",
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"\xb7" "BSDI fs",
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"\xb8" "BSDI swap",
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"\xbe" "Solaris boot",
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"\xeb" "BeOS fs",
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"\xee" "EFI GPT", /* Intel EFI GUID Partition Table */
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"\xef" "EFI (FAT-12/16/32)", /* Intel EFI System Partition */
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"\xf0" "Linux/PA-RISC boot", /* Linux/PA-RISC boot loader */
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"\xf2" "DOS secondary", /* DOS 3.3+ secondary */
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"\xfd" "Linux raid autodetect", /* New (2.2.x) raid partition with
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autodetect using persistent
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superblock */
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#if 0 /* ENABLE_WEIRD_PARTITION_TYPES */
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"\x02" "XENIX root",
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"\x03" "XENIX usr",
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"\x08" "AIX", /* AIX boot (AIX -- PS/2 port) or SplitDrive */
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"\x09" "AIX bootable", /* AIX data or Coherent */
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"\x10" "OPUS",
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"\x18" "AST SmartSleep",
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"\x24" "NEC DOS",
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"\x39" "Plan 9",
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"\x40" "Venix 80286",
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"\x4d" "QNX4.x",
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"\x4e" "QNX4.x 2nd part",
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"\x4f" "QNX4.x 3rd part",
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"\x50" "OnTrack DM",
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"\x51" "OnTrack DM6 Aux1", /* (or Novell) */
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"\x52" "CP/M", /* CP/M or Microport SysV/AT */
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"\x53" "OnTrack DM6 Aux3",
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"\x54" "OnTrackDM6",
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"\x55" "EZ-Drive",
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"\x56" "Golden Bow",
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"\x5c" "Priam Edisk",
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"\x61" "SpeedStor",
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"\x64" "Novell Netware 286",
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"\x65" "Novell Netware 386",
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"\x70" "DiskSecure Multi-Boot",
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"\x75" "PC/IX",
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"\x93" "Amoeba",
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"\x94" "Amoeba BBT", /* (bad block table) */
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"\xa7" "NeXTSTEP",
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"\xbb" "Boot Wizard hidden",
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"\xc1" "DRDOS/sec (FAT-12)",
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"\xc4" "DRDOS/sec (FAT-16 < 32M)",
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"\xc6" "DRDOS/sec (FAT-16)",
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"\xc7" "Syrinx",
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"\xda" "Non-FS data",
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"\xdb" "CP/M / CTOS / ...",/* CP/M or Concurrent CP/M or
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Concurrent DOS or CTOS */
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"\xde" "Dell Utility", /* Dell PowerEdge Server utilities */
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"\xdf" "BootIt", /* BootIt EMBRM */
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"\xe1" "DOS access", /* DOS access or SpeedStor 12-bit FAT
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extended partition */
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"\xe3" "DOS R/O", /* DOS R/O or SpeedStor */
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"\xe4" "SpeedStor", /* SpeedStor 16-bit FAT extended
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partition < 1024 cyl. */
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"\xf1" "SpeedStor",
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"\xf4" "SpeedStor", /* SpeedStor large partition */
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"\xfe" "LANstep", /* SpeedStor >1024 cyl. or LANstep */
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"\xff" "BBT", /* Xenix Bad Block Table */
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#endif
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NULL
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};
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enum {
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dev_fd = 3 /* the disk */
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};
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/* Globals */
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struct globals {
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char *line_ptr;
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const char *disk_device;
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int g_partitions; // = 4; /* maximum partition + 1 */
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unsigned units_per_sector; // = 1;
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unsigned sector_size; // = DEFAULT_SECTOR_SIZE;
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unsigned user_set_sector_size;
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unsigned sector_offset; // = 1;
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unsigned g_heads, g_sectors, g_cylinders;
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smallint /* enum label_type */ current_label_type;
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smallint display_in_cyl_units; // = 1;
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#if ENABLE_FEATURE_OSF_LABEL
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smallint possibly_osf_label;
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#endif
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smallint listing; /* no aborts for fdisk -l */
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smallint dos_compatible_flag; // = 1;
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#if ENABLE_FEATURE_FDISK_WRITABLE
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//int dos_changed;
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smallint nowarn; /* no warnings for fdisk -l/-s */
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#endif
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int ext_index; /* the prime extended partition */
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unsigned user_cylinders, user_heads, user_sectors;
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unsigned pt_heads, pt_sectors;
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unsigned kern_heads, kern_sectors;
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sector_t extended_offset; /* offset of link pointers */
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sector_t total_number_of_sectors;
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jmp_buf listingbuf;
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char line_buffer[80];
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char partname_buffer[80];
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/* Raw disk label. For DOS-type partition tables the MBR,
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* with descriptions of the primary partitions. */
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char MBRbuffer[MAX_SECTOR_SIZE];
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/* Partition tables */
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struct pte ptes[MAXIMUM_PARTS];
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};
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#define G (*ptr_to_globals)
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#define line_ptr (G.line_ptr )
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#define disk_device (G.disk_device )
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#define g_partitions (G.g_partitions )
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#define units_per_sector (G.units_per_sector )
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#define sector_size (G.sector_size )
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#define user_set_sector_size (G.user_set_sector_size)
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#define sector_offset (G.sector_offset )
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#define g_heads (G.g_heads )
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#define g_sectors (G.g_sectors )
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#define g_cylinders (G.g_cylinders )
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#define current_label_type (G.current_label_type )
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#define display_in_cyl_units (G.display_in_cyl_units)
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#define possibly_osf_label (G.possibly_osf_label )
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#define listing (G.listing )
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#define dos_compatible_flag (G.dos_compatible_flag )
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#define nowarn (G.nowarn )
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#define ext_index (G.ext_index )
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#define user_cylinders (G.user_cylinders )
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#define user_heads (G.user_heads )
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#define user_sectors (G.user_sectors )
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#define pt_heads (G.pt_heads )
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#define pt_sectors (G.pt_sectors )
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#define kern_heads (G.kern_heads )
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#define kern_sectors (G.kern_sectors )
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#define extended_offset (G.extended_offset )
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#define total_number_of_sectors (G.total_number_of_sectors)
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#define listingbuf (G.listingbuf )
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#define line_buffer (G.line_buffer )
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#define partname_buffer (G.partname_buffer)
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#define MBRbuffer (G.MBRbuffer )
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#define ptes (G.ptes )
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#define INIT_G() do { \
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SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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sector_size = DEFAULT_SECTOR_SIZE; \
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sector_offset = 1; \
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g_partitions = 4; \
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display_in_cyl_units = 1; \
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units_per_sector = 1; \
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dos_compatible_flag = 1; \
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} while (0)
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|
|
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/* TODO: move to libbb? */
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/* TODO: return unsigned long long, FEATURE_FDISK_BLKSIZE _can_ handle
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* disks > 2^32 sectors
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*/
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static sector_t bb_BLKGETSIZE_sectors(int fd)
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{
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uint64_t v64;
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unsigned long longsectors;
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if (ioctl(fd, BLKGETSIZE64, &v64) == 0) {
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/* Got bytes, convert to 512 byte sectors */
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v64 >>= 9;
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if (v64 != (sector_t)v64) {
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ret_trunc:
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/* Not only DOS, but all other partition tables
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* we support can't record more than 32 bit
|
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* sector counts or offsets
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*/
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bb_error_msg("device has more than 2^32 sectors, can't use all of them");
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v64 = (uint32_t)-1L;
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}
|
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return v64;
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}
|
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/* Needs temp of type long */
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if (ioctl(fd, BLKGETSIZE, &longsectors)) {
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/* Perhaps this is a disk image */
|
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off_t sz = lseek(fd, 0, SEEK_END);
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longsectors = 0;
|
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if (sz > 0)
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longsectors = (uoff_t)sz / sector_size;
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lseek(fd, 0, SEEK_SET);
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}
|
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if (sizeof(long) > sizeof(sector_t)
|
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&& longsectors != (sector_t)longsectors
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) {
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goto ret_trunc;
|
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}
|
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return longsectors;
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}
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|
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#define IS_EXTENDED(i) \
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((i) == EXTENDED || (i) == WIN98_EXTENDED || (i) == LINUX_EXTENDED)
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|
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#define cround(n) (display_in_cyl_units ? ((n)/units_per_sector)+1 : (n))
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|
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#define scround(x) (((x)+units_per_sector-1)/units_per_sector)
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|
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#define pt_offset(b, n) \
|
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((struct partition *)((b) + 0x1be + (n) * sizeof(struct partition)))
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|
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#define sector(s) ((s) & 0x3f)
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|
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#define cylinder(s, c) ((c) | (((s) & 0xc0) << 2))
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|
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#define hsc2sector(h,s,c) \
|
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(sector(s) - 1 + sectors * ((h) + heads * cylinder(s,c)))
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|
|
|
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(prompt, line_buffer, sizeof(line_buffer), NULL);
|
|
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"
|
|
|
|
#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
|
|
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) {
|
|
int needw = 0;
|
|
|
|
for (i = 0; i < 8; i++)
|
|
if (ptes[i].changed)
|
|
needw = 1;
|
|
if (needw)
|
|
sun_write_table();
|
|
}
|
|
|
|
printf("The partition table has been altered!\n\n");
|
|
reread_partition_table(1);
|
|
}
|
|
|
|
static void
|
|
reread_partition_table(int leave)
|
|
{
|
|
int i;
|
|
|
|
printf("Calling ioctl() to re-read partition table\n");
|
|
sync();
|
|
/* sleep(2); Huh? */
|
|
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);
|
|
}
|
|
}
|
|
#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();
|
|
}
|
|
|
|
/* 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], *s;
|
|
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;
|
|
for (s = ptname; *s; s++)
|
|
continue;
|
|
/* note: excluding '0': e.g. mmcblk0 is not a partition name! */
|
|
if (s[-1] >= '1' && s[-1] <= '9')
|
|
continue;
|
|
sprintf(devname, "/dev/%s", ptname);
|
|
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 */
|
|
}
|