busybox/util-linux/fdisk.c

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/* vi: set sw=4 ts=4: */
/*
* fdisk.c -- Partition table manipulator for Linux.
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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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*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
//config:config FDISK
//config: bool "fdisk (37 kb)"
//config: default y
//config: select PLATFORM_LINUX
//config: help
//config: The fdisk utility is used to divide hard disks into one or more
//config: logical disks, which are generally called partitions. This utility
//config: can be used to list and edit the set of partitions or BSD style
//config: 'disk slices' that are defined on a hard drive.
//config:
//config:config FDISK_SUPPORT_LARGE_DISKS
//config: bool "Support over 4GB disks"
//config: default y
//config: depends on FDISK
//config: depends on !LFS # with LFS no special code is needed
//config:
//config:config FEATURE_FDISK_WRITABLE
//config: bool "Write support"
//config: default y
//config: depends on FDISK
//config: help
//config: Enabling this option allows you to create or change a partition table
//config: and write those changes out to disk. If you leave this option
//config: disabled, you will only be able to view the partition table.
//config:
//config:config FEATURE_AIX_LABEL
//config: bool "Support AIX disklabels"
//config: default n
//config: depends on FDISK && FEATURE_FDISK_WRITABLE
//config: help
//config: Enabling this option allows you to create or change AIX disklabels.
//config: Most people can safely leave this option disabled.
//config:
//config:config FEATURE_SGI_LABEL
//config: bool "Support SGI disklabels"
//config: default n
//config: depends on FDISK && FEATURE_FDISK_WRITABLE
//config: help
//config: Enabling this option allows you to create or change SGI disklabels.
//config: Most people can safely leave this option disabled.
//config:
//config:config FEATURE_SUN_LABEL
//config: bool "Support SUN disklabels"
//config: default n
//config: depends on FDISK && FEATURE_FDISK_WRITABLE
//config: help
//config: Enabling this option allows you to create or change SUN disklabels.
//config: Most people can safely leave this option disabled.
//config:
//config:config FEATURE_OSF_LABEL
//config: bool "Support BSD disklabels"
//config: default n
//config: depends on FDISK && FEATURE_FDISK_WRITABLE
//config: help
//config: Enabling this option allows you to create or change BSD disklabels
//config: and define and edit BSD disk slices.
//config:
//config:config FEATURE_GPT_LABEL
//config: bool "Support GPT disklabels"
//config: default n
//config: depends on FDISK && FEATURE_FDISK_WRITABLE
//config: help
//config: Enabling this option allows you to view GUID Partition Table
//config: disklabels.
//config:
//config:config FEATURE_FDISK_ADVANCED
//config: bool "Support expert mode"
//config: default y
//config: depends on FDISK && FEATURE_FDISK_WRITABLE
//config: help
//config: Enabling this option allows you to do terribly unsafe things like
//config: define arbitrary drive geometry, move the beginning of data in a
//config: partition, and similarly evil things. Unless you have a very good
//config: reason you would be wise to leave this disabled.
//applet:IF_FDISK(APPLET(fdisk, BB_DIR_SBIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_FDISK) += fdisk.o
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/* Looks like someone forgot to add this to config system */
//usage:#ifndef ENABLE_FEATURE_FDISK_BLKSIZE
//usage:# define ENABLE_FEATURE_FDISK_BLKSIZE 0
//usage:# define IF_FEATURE_FDISK_BLKSIZE(a)
//usage:#endif
//usage:
//usage:#define fdisk_trivial_usage
//usage: "[-ul" IF_FEATURE_FDISK_BLKSIZE("s") "] "
//usage: "[-C CYLINDERS] [-H HEADS] [-S SECTORS] [-b SSZ] DISK"
//usage:#define fdisk_full_usage "\n\n"
//usage: "Change partition table\n"
//usage: "\n -u Start and End are in sectors (instead of cylinders)"
//usage: "\n -l Show partition table for each DISK, then exit"
//usage: IF_FEATURE_FDISK_BLKSIZE(
//usage: "\n -s Show partition sizes in kb for each DISK, then exit"
//usage: )
//usage: "\n -b 2048 (for certain MO disks) use 2048-byte sectors"
//usage: "\n -C CYLINDERS Set number of cylinders/heads/sectors"
//usage: "\n -H HEADS Typically 255"
//usage: "\n -S SECTORS Typically 63"
#ifndef _LARGEFILE64_SOURCE
/* For lseek64 */
# define _LARGEFILE64_SOURCE
#endif
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#include <assert.h> /* assert */
#include <sys/mount.h>
#if !defined(BLKSSZGET)
# define BLKSSZGET _IO(0x12, 104)
#endif
#if !defined(BLKGETSIZE64)
# define BLKGETSIZE64 _IOR(0x12,114,size_t)
#endif
#include "libbb.h"
#include "unicode.h"
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#if BB_LITTLE_ENDIAN
# define inline_if_little_endian ALWAYS_INLINE
#else
# define inline_if_little_endian /* nothing */
#endif
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/* Looks like someone forgot to add this to config system */
#ifndef ENABLE_FEATURE_FDISK_BLKSIZE
# define ENABLE_FEATURE_FDISK_BLKSIZE 0
# define IF_FEATURE_FDISK_BLKSIZE(a)
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#endif
#define DEFAULT_SECTOR_SIZE 512
#define DEFAULT_SECTOR_SIZE_STR "512"
#define MAX_SECTOR_SIZE 2048
#define SECTOR_SIZE 512 /* still used in osf/sgi/sun code */
#define MAXIMUM_PARTS 60
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#define ACTIVE_FLAG 0x80
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#define EXTENDED 0x05
#define WIN98_EXTENDED 0x0f
#define LINUX_PARTITION 0x81
#define LINUX_SWAP 0x82
#define LINUX_NATIVE 0x83
#define LINUX_EXTENDED 0x85
#define LINUX_LVM 0x8e
#define LINUX_RAID 0xfd
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enum {
OPT_b = 1 << 0,
OPT_C = 1 << 1,
OPT_H = 1 << 2,
OPT_l = 1 << 3,
OPT_S = 1 << 4,
OPT_u = 1 << 5,
OPT_s = (1 << 6) * ENABLE_FEATURE_FDISK_BLKSIZE,
};
typedef unsigned long long ullong;
/* Used for sector numbers. Partition formats we know
* do not support more than 2^32 sectors
*/
typedef uint32_t sector_t;
#if UINT_MAX == 0xffffffff
# define SECT_FMT ""
#elif ULONG_MAX == 0xffffffff
# define SECT_FMT "l"
#else
# error Cant detect sizeof(uint32_t)
#endif
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struct hd_geometry {
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unsigned char heads;
unsigned char sectors;
unsigned short cylinders;
unsigned long start;
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};
#define HDIO_GETGEO 0x0301 /* get device geometry */
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/* TODO: #if ENABLE_FEATURE_FDISK_WRITABLE */
/* (currently fdisk_sun/sgi.c do not have proper WRITABLE #ifs) */
static const char msg_building_new_label[] ALIGN1 =
"Building a new %s. Changes will remain in memory only,\n"
"until you decide to write them. After that the previous content\n"
"won't be recoverable.\n\n";
static const char msg_part_already_defined[] ALIGN1 =
"Partition %u is already defined, delete it before re-adding\n";
/* #endif */
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struct partition {
unsigned char boot_ind; /* 0x80 - active */
unsigned char head; /* starting head */
unsigned char sector; /* starting sector */
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 */
unsigned char end_sector; /* end sector */
unsigned char end_cyl; /* end cylinder */
unsigned char start4[4]; /* starting sector counting from 0 */
unsigned char size4[4]; /* nr of sectors in partition */
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} PACKED;
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/*
* per partition table entry data
*
* The four primary partitions have the same sectorbuffer (MBRbuffer)
* and have NULL ext_pointer.
* Each logical partition table entry has two pointers, one for the
* partition and one link to the next one.
*/
struct pte {
struct partition *part_table; /* points into sectorbuffer */
struct partition *ext_pointer; /* points into sectorbuffer */
sector_t offset_from_dev_start; /* disk sector number */
char *sectorbuffer; /* disk sector contents */
#if ENABLE_FEATURE_FDISK_WRITABLE
char changed; /* boolean */
#endif
};
#define unable_to_open "can't open '%s'"
#define unable_to_read "can't read from %s"
#define unable_to_seek "can't seek on %s"
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enum label_type {
LABEL_DOS, LABEL_SUN, LABEL_SGI, LABEL_AIX, LABEL_OSF, LABEL_GPT
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};
#define LABEL_IS_DOS (LABEL_DOS == current_label_type)
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#if ENABLE_FEATURE_SUN_LABEL
#define LABEL_IS_SUN (LABEL_SUN == current_label_type)
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#define STATIC_SUN static
#else
#define LABEL_IS_SUN 0
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#define STATIC_SUN extern
#endif
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#if ENABLE_FEATURE_SGI_LABEL
#define LABEL_IS_SGI (LABEL_SGI == current_label_type)
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#define STATIC_SGI static
#else
#define LABEL_IS_SGI 0
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#define STATIC_SGI extern
#endif
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#if ENABLE_FEATURE_AIX_LABEL
#define LABEL_IS_AIX (LABEL_AIX == current_label_type)
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#define STATIC_AIX static
#else
#define LABEL_IS_AIX 0
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#define STATIC_AIX extern
#endif
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#if ENABLE_FEATURE_OSF_LABEL
#define LABEL_IS_OSF (LABEL_OSF == current_label_type)
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#define STATIC_OSF static
#else
#define LABEL_IS_OSF 0
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#define STATIC_OSF extern
#endif
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#if ENABLE_FEATURE_GPT_LABEL
#define LABEL_IS_GPT (LABEL_GPT == current_label_type)
#define STATIC_GPT static
#else
#define LABEL_IS_GPT 0
#define STATIC_GPT extern
#endif
enum action { OPEN_MAIN, TRY_ONLY, CREATE_EMPTY_DOS, CREATE_EMPTY_SUN };
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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);
static void reread_partition_table(int leave);
static void delete_partition(int i);
static unsigned get_partition(int warn, unsigned max);
static void list_types(const char *const *sys);
static sector_t read_int(sector_t low, sector_t dflt, sector_t high, sector_t base, const char *mesg);
#endif
static const char *partition_type(unsigned char type);
static void get_geometry(void);
static void read_pte(struct pte *pe, sector_t offset);
#if ENABLE_FEATURE_SUN_LABEL || ENABLE_FEATURE_FDISK_WRITABLE
static int get_boot(enum action what);
#else
static int get_boot(void);
#endif
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static sector_t get_start_sect(const struct partition *p);
static sector_t get_nr_sects(const struct partition *p);
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/* DOS partition types */
static const char *const i386_sys_types[] = {
"\x00" "Empty",
"\x01" "FAT12",
"\x04" "FAT16 <32M",
"\x05" "Extended", /* DOS 3.3+ extended partition */
"\x06" "FAT16", /* DOS 16-bit >=32M */
"\x07" "HPFS/NTFS", /* OS/2 IFS, eg, HPFS or NTFS or QNX */
"\x0a" "OS/2 Boot Manager",/* OS/2 Boot Manager */
"\x0b" "Win95 FAT32",
"\x0c" "Win95 FAT32 (LBA)",/* LBA really is 'Extended Int 13h' */
"\x0e" "Win95 FAT16 (LBA)",
"\x0f" "Win95 Ext'd (LBA)",
"\x11" "Hidden FAT12",
"\x12" "Compaq diagnostics",
"\x14" "Hidden FAT16 <32M",
"\x16" "Hidden FAT16",
"\x17" "Hidden HPFS/NTFS",
"\x1b" "Hidden Win95 FAT32",
"\x1c" "Hidden W95 FAT32 (LBA)",
"\x1e" "Hidden W95 FAT16 (LBA)",
"\x3c" "Part.Magic recovery",
"\x41" "PPC PReP Boot",
"\x42" "SFS",
"\x63" "GNU HURD or SysV", /* GNU HURD or Mach or Sys V/386 (such as ISC UNIX) */
"\x80" "Old Minix", /* Minix 1.4a and earlier */
"\x81" "Minix / old Linux",/* Minix 1.4b and later */
"\x82" "Linux swap", /* also Solaris */
"\x83" "Linux",
"\x84" "OS/2 hidden C: drive",
"\x85" "Linux extended",
"\x86" "NTFS volume set",
"\x87" "NTFS volume set",
"\x8e" "Linux LVM",
"\x9f" "BSD/OS", /* BSDI */
"\xa0" "Thinkpad hibernation",
"\xa5" "FreeBSD", /* various BSD flavours */
"\xa6" "OpenBSD",
"\xa8" "Darwin UFS",
"\xa9" "NetBSD",
"\xab" "Darwin boot",
"\xb7" "BSDI fs",
"\xb8" "BSDI swap",
"\xbe" "Solaris boot",
"\xeb" "BeOS fs",
"\xee" "EFI GPT", /* Intel EFI GUID Partition Table */
"\xef" "EFI (FAT-12/16/32)", /* Intel EFI System Partition */
"\xf0" "Linux/PA-RISC boot", /* Linux/PA-RISC boot loader */
"\xf2" "DOS secondary", /* DOS 3.3+ secondary */
"\xfd" "Linux raid autodetect", /* New (2.2.x) raid partition with
autodetect using persistent
superblock */
#if 0 /* ENABLE_WEIRD_PARTITION_TYPES */
"\x02" "XENIX root",
"\x03" "XENIX usr",
"\x08" "AIX", /* AIX boot (AIX -- PS/2 port) or SplitDrive */
"\x09" "AIX bootable", /* AIX data or Coherent */
"\x10" "OPUS",
"\x18" "AST SmartSleep",
"\x24" "NEC DOS",
"\x39" "Plan 9",
"\x40" "Venix 80286",
"\x4d" "QNX4.x",
"\x4e" "QNX4.x 2nd part",
"\x4f" "QNX4.x 3rd part",
"\x50" "OnTrack DM",
"\x51" "OnTrack DM6 Aux1", /* (or Novell) */
"\x52" "CP/M", /* CP/M or Microport SysV/AT */
"\x53" "OnTrack DM6 Aux3",
"\x54" "OnTrackDM6",
"\x55" "EZ-Drive",
"\x56" "Golden Bow",
"\x5c" "Priam Edisk",
"\x61" "SpeedStor",
"\x64" "Novell Netware 286",
"\x65" "Novell Netware 386",
"\x70" "DiskSecure Multi-Boot",
"\x75" "PC/IX",
"\x93" "Amoeba",
"\x94" "Amoeba BBT", /* (bad block table) */
"\xa7" "NeXTSTEP",
"\xbb" "Boot Wizard hidden",
"\xc1" "DRDOS/sec (FAT-12)",
"\xc4" "DRDOS/sec (FAT-16 < 32M)",
"\xc6" "DRDOS/sec (FAT-16)",
"\xc7" "Syrinx",
"\xda" "Non-FS data",
"\xdb" "CP/M / CTOS / ...",/* CP/M or Concurrent CP/M or
Concurrent DOS or CTOS */
"\xde" "Dell Utility", /* Dell PowerEdge Server utilities */
"\xdf" "BootIt", /* BootIt EMBRM */
"\xe1" "DOS access", /* DOS access or SpeedStor 12-bit FAT
extended partition */
"\xe3" "DOS R/O", /* DOS R/O or SpeedStor */
"\xe4" "SpeedStor", /* SpeedStor 16-bit FAT extended
partition < 1024 cyl. */
"\xf1" "SpeedStor",
"\xf4" "SpeedStor", /* SpeedStor large partition */
"\xfe" "LANstep", /* SpeedStor >1024 cyl. or LANstep */
"\xff" "BBT", /* Xenix Bad Block Table */
#endif
NULL
};
enum {
dev_fd = 3 /* the disk */
};
/* Globals */
struct globals {
char *line_ptr;
const char *disk_device;
int g_partitions; // = 4; /* maximum partition + 1 */
unsigned units_per_sector; // = 1;
unsigned sector_size; // = DEFAULT_SECTOR_SIZE;
unsigned user_set_sector_size;
unsigned sector_offset; // = 1;
unsigned g_heads, g_sectors, g_cylinders;
smallint /* enum label_type */ current_label_type;
smallint display_in_cyl_units;
#if ENABLE_FEATURE_OSF_LABEL
smallint possibly_osf_label;
#endif
smallint listing; /* no aborts for fdisk -l */
smallint dos_compatible_flag; // = 1;
#if ENABLE_FEATURE_FDISK_WRITABLE
//int dos_changed;
smallint nowarn; /* no warnings for fdisk -l/-s */
#endif
int ext_index; /* the prime extended partition */
unsigned user_cylinders, user_heads, user_sectors;
unsigned pt_heads, pt_sectors;
unsigned kern_heads, kern_sectors;
sector_t extended_offset; /* offset of link pointers */
sector_t total_number_of_sectors;
jmp_buf listingbuf;
char line_buffer[80];
/* Raw disk label. For DOS-type partition tables the MBR,
* with descriptions of the primary partitions. */
char MBRbuffer[MAX_SECTOR_SIZE];
/* Partition tables */
struct pte ptes[MAXIMUM_PARTS];
};
#define G (*ptr_to_globals)
#define line_ptr (G.line_ptr )
#define disk_device (G.disk_device )
#define g_partitions (G.g_partitions )
#define units_per_sector (G.units_per_sector )
#define sector_size (G.sector_size )
#define user_set_sector_size (G.user_set_sector_size)
#define sector_offset (G.sector_offset )
#define g_heads (G.g_heads )
#define g_sectors (G.g_sectors )
#define g_cylinders (G.g_cylinders )
#define current_label_type (G.current_label_type )
#define display_in_cyl_units (G.display_in_cyl_units)
#define possibly_osf_label (G.possibly_osf_label )
#define listing (G.listing )
#define dos_compatible_flag (G.dos_compatible_flag )
#define nowarn (G.nowarn )
#define ext_index (G.ext_index )
#define user_cylinders (G.user_cylinders )
#define user_heads (G.user_heads )
#define user_sectors (G.user_sectors )
#define pt_heads (G.pt_heads )
#define pt_sectors (G.pt_sectors )
#define kern_heads (G.kern_heads )
#define kern_sectors (G.kern_sectors )
#define extended_offset (G.extended_offset )
#define total_number_of_sectors (G.total_number_of_sectors)
#define listingbuf (G.listingbuf )
#define line_buffer (G.line_buffer )
#define MBRbuffer (G.MBRbuffer )
#define ptes (G.ptes )
#define INIT_G() do { \
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
sector_size = DEFAULT_SECTOR_SIZE; \
sector_offset = 1; \
g_partitions = 4; \
units_per_sector = 1; \
dos_compatible_flag = 1; \
} while (0)
/* TODO: move to libbb? */
/* TODO: return unsigned long long, FEATURE_FDISK_BLKSIZE _can_ handle
* disks > 2^32 sectors
*/
static sector_t bb_BLKGETSIZE_sectors(int fd)
{
uint64_t v64;
unsigned long longsectors;
if (ioctl(fd, BLKGETSIZE64, &v64) == 0) {
/* Got bytes, convert to 512 byte sectors */
v64 >>= 9;
if (v64 != (sector_t)v64) {
ret_trunc:
/* Not only DOS, but all other partition tables
* we support can't record more than 32 bit
* sector counts or offsets
*/
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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bb_simple_error_msg("device has more than 2^32 sectors, can't use all of them");
v64 = (uint32_t)-1L;
}
return v64;
}
/* Needs temp of type long */
if (ioctl(fd, BLKGETSIZE, &longsectors)) {
/* Perhaps this is a disk image */
off_t sz = lseek(fd, 0, SEEK_END);
longsectors = 0;
if (sz > 0)
longsectors = (uoff_t)sz / sector_size;
lseek(fd, 0, SEEK_SET);
}
if (sizeof(long) > sizeof(sector_t)
&& longsectors != (sector_t)longsectors
) {
goto ret_trunc;
}
return longsectors;
}
#define IS_EXTENDED(i) \
((i) == EXTENDED || (i) == WIN98_EXTENDED || (i) == LINUX_EXTENDED)
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#define cround(n) (display_in_cyl_units ? ((n)/units_per_sector)+1 : (n))
#define scround(x) (((x)+units_per_sector-1)/units_per_sector)
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#define pt_offset(b, n) \
((struct partition *)((b) + 0x1be + (n) * sizeof(struct partition)))
#define sector(s) ((s) & 0x3f)
#define cylinder(s, c) ((c) | (((s) & 0xc0) << 2))
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 */
static const char *
partname(const char *dev, int pno, int lth)
{
const char *p;
int w, wp;
int bufsiz;
char *bufp;
bufp = auto_string(xzalloc(80));
bufsiz = 80;
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;
}
#if ENABLE_FEATURE_SGI_LABEL || ENABLE_FEATURE_OSF_LABEL
static ALWAYS_INLINE struct partition *
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get_part_table(int i)
{
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return ptes[i].part_table;
}
#endif
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static ALWAYS_INLINE const char *
str_units(void)
{
return display_in_cyl_units ? "cylinder" : "sector";
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}
static int
valid_part_table_flag(const char *mbuffer)
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{
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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
}
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#if ENABLE_FEATURE_FDISK_WRITABLE
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
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write_part_table_flag(char *b)
{
b[510] = 0x55;
b[511] = 0xaa;
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}
/* Read line; return 0 or first printable non-space char */
static int
read_line(const char *prompt)
{
int sz;
sz = read_line_input(NULL, prompt, line_buffer, sizeof(line_buffer));
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 char
read_nonempty(const char *mesg)
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{
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while (!read_line(mesg))
continue;
return *line_ptr;
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}
static char
read_maybe_empty(const char *mesg)
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{
if (!read_line(mesg)) {
line_ptr = line_buffer;
line_ptr[0] = '\n';
line_ptr[1] = '\0';
}
return line_ptr[0];
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}
static int
read_hex(const char *const *sys)
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{
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;
}
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}
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static void
write_sector(sector_t secno, const void *buf)
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{
seek_sector(secno);
xwrite(dev_fd, buf, sector_size);
}
#endif /* FEATURE_FDISK_WRITABLE */
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#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)
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STATIC_OSF void bsd_select(void);
STATIC_OSF void xbsd_print_disklabel(int);
#include "fdisk_osf.c"
STATIC_GPT void gpt_list_table(int xtra);
#include "fdisk_gpt.c"
#if ENABLE_FEATURE_SGI_LABEL || ENABLE_FEATURE_SUN_LABEL
static uint16_t
fdisk_swap16(uint16_t x)
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{
return (x << 8) | (x >> 8);
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}
static uint32_t
fdisk_swap32(uint32_t x)
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{
return (x << 24) |
((x & 0xFF00) << 8) |
((x & 0xFF0000) >> 8) |
(x >> 24);
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}
#endif
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STATIC_SGI const char *const sgi_sys_types[];
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STATIC_SGI unsigned sgi_get_num_sectors(int i);
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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
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STATIC_SGI void sgi_set_xcyl(void);
#endif
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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"
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STATIC_SUN const char *const sun_sys_types[];
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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
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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
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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"
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static inline_if_little_endian unsigned
read4_little_endian(const unsigned char *cp)
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{
uint32_t v;
move_from_unaligned32(v, cp);
return SWAP_LE32(v);
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}
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)
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{
return read4_little_endian(p->size4);
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}
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#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)
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{
uint32_t v = SWAP_LE32(val);
move_to_unaligned32(cp, v);
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}
static void
set_start_sect(struct partition *p, unsigned start_sect)
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{
store4_little_endian(p->start4, start_sect);
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}
static void
set_nr_sects(struct partition *p, unsigned nr_sects)
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{
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store4_little_endian(p->size4, nr_sects);
}
#endif
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/* Allocate a buffer and read a partition table sector */
static void
read_pte(struct pte *pe, sector_t offset)
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{
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);
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#if ENABLE_FEATURE_FDISK_WRITABLE
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pe->changed = 0;
#endif
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pe->part_table = pe->ext_pointer = NULL;
}
static sector_t
get_partition_start_from_dev_start(const struct pte *pe)
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{
return pe->offset_from_dev_start + get_start_sect(pe->part_table);
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}
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#if ENABLE_FEATURE_FDISK_WRITABLE
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/*
* 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".
*/
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#ifdef UNUSED
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static int
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is_dos_partition(int t)
{
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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);
}
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#endif
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static void
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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");
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#if ENABLE_FEATURE_FDISK_ADVANCED
puts("x\textra functionality (experts only)");
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#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");
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#if ENABLE_FEATURE_FDISK_ADVANCED
puts("x\textra functionality (experts only)");
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#endif
}
}
#endif /* FEATURE_FDISK_WRITABLE */
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#if ENABLE_FEATURE_FDISK_ADVANCED
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static void
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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 */
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#if ENABLE_FEATURE_SGI_LABEL
puts("g\tcreate an IRIX (SGI) partition table");/* sgi */
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#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");
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}
}
#endif /* ADVANCED mode */
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#if ENABLE_FEATURE_FDISK_WRITABLE
static const char *const *
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get_sys_types(void)
{
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return (
LABEL_IS_SUN ? sun_sys_types :
LABEL_IS_SGI ? sgi_sys_types :
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i386_sys_types);
}
#else
#define get_sys_types() i386_sys_types
#endif
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static const char *
partition_type(unsigned char type)
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{
int i;
const char *const *types = get_sys_types();
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for (i = 0; types[i]; i++)
if ((unsigned char)types[i][0] == type)
return types[i] + 1;
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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));
}
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#if ENABLE_FEATURE_FDISK_WRITABLE
static int
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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);
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}
static void
list_types(const char *const *sys)
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{
enum { COLS = 3 };
unsigned last[COLS];
unsigned done, next, size;
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int i;
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for (size = 0; sys[size]; size++)
continue;
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done = 0;
for (i = COLS-1; i >= 0; i--) {
done += (size + i - done) / (i + 1);
last[COLS-1 - i] = done;
}
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i = done = next = 0;
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do {
printf("%c%2x %-22.22s", i ? ' ' : '\n',
(unsigned char)sys[next][0],
sys[next] + 1);
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next = last[i++] + done;
if (i >= COLS || next >= last[i]) {
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i = 0;
next = ++done;
}
} while (done < last[0]);
bb_putchar('\n');
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}
#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);
}
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static void
set_partition(int i, int doext, sector_t start, sector_t stop, int sysid)
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{
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struct partition *p;
sector_t offset;
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if (doext) {
p = ptes[i].ext_pointer;
offset = extended_offset;
} else {
p = ptes[i].part_table;
offset = ptes[i].offset_from_dev_start;
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}
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);
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ptes[i].changed = 1;
}
#endif
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static int
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warn_geometry(void)
{
if (g_heads && g_sectors && g_cylinders)
return 0;
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printf("Unknown value(s) for:");
if (!g_heads)
printf(" heads");
if (!g_sectors)
printf(" sectors");
if (!g_cylinders)
printf(" cylinders");
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#if ENABLE_FEATURE_FDISK_WRITABLE
puts(" (settable in the extra functions menu)");
#else
bb_putchar('\n');
#endif
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return 1;
}
static void
update_units(void)
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{
int cyl_units = g_heads * g_sectors;
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if (display_in_cyl_units && cyl_units)
units_per_sector = cyl_units;
else
units_per_sector = 1; /* in sectors */
}
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#if ENABLE_FEATURE_FDISK_WRITABLE
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static void
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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"
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"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);
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}
#endif
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static void
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read_extended(int ext)
{
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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)) {
puts("Bad offset in primary extended partition");
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return;
}
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while (IS_EXTENDED(p->sys_ind)) {
struct pte *pe = &ptes[g_partitions];
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if (g_partitions >= MAXIMUM_PARTS) {
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/* 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];
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#if ENABLE_FEATURE_FDISK_WRITABLE
printf("Warning: deleting partitions after %u\n",
g_partitions);
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pre->changed = 1;
#endif
clear_partition(pre->ext_pointer);
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return;
}
read_pte(pe, extended_offset + get_start_sect(p));
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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)) {
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if (IS_EXTENDED(p->sys_ind)) {
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if (pe->ext_pointer)
printf("Warning: extra link "
"pointer in partition table"
" %u\n", g_partitions + 1);
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else
pe->ext_pointer = p;
} else if (p->sys_ind) {
if (pe->part_table)
printf("Warning: ignoring extra "
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"data in partition table"
" %u\n", g_partitions + 1);
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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++;
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}
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#if ENABLE_FEATURE_FDISK_WRITABLE
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/* remove empty links */
remove:
for (i = 4; i < g_partitions; i++) {
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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);
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delete_partition(i);
goto remove; /* numbering changed */
}
}
#endif
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}
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#if ENABLE_FEATURE_FDISK_WRITABLE
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static void
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create_doslabel(void)
{
printf(msg_building_new_label, "DOS disklabel");
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current_label_type = LABEL_DOS;
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#if ENABLE_FEATURE_OSF_LABEL
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possibly_osf_label = 0;
#endif
g_partitions = 4;
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memset(&MBRbuffer[510 - 4*16], 0, 4*16);
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write_part_table_flag(MBRbuffer);
extended_offset = 0;
set_all_unchanged();
set_changed(0);
get_boot(CREATE_EMPTY_DOS);
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}
#endif
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static void
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get_sectorsize(void)
{
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if (!user_set_sector_size) {
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int arg;
if (ioctl(dev_fd, BLKSSZGET, &arg) == 0)
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sector_size = arg;
if (sector_size != DEFAULT_SECTOR_SIZE)
printf("Note: sector size is %u "
"(not " DEFAULT_SECTOR_SIZE_STR ")\n",
sector_size);
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}
}
static void
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get_kernel_geometry(void)
{
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struct hd_geometry geometry;
if (!ioctl(dev_fd, HDIO_GETGEO, &geometry)) {
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kern_heads = geometry.heads;
kern_sectors = geometry.sectors;
/* never use geometry.cylinders - it is truncated */
}
}
static void
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get_partition_table_geometry(void)
{
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const unsigned char *bufp = (const unsigned char *)MBRbuffer;
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struct partition *p;
int i, h, s, hh, ss;
int first = 1;
int bad = 0;
if (!(valid_part_table_flag((char*)bufp)))
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return;
hh = ss = 0;
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for (i = 0; i < 4; i++) {
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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;
}
}
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static void
get_geometry(void)
{
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int sec_fac;
get_sectorsize();
sec_fac = sector_size / 512;
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#if ENABLE_FEATURE_SUN_LABEL
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guess_device_type();
#endif
g_heads = g_cylinders = g_sectors = 0;
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kern_heads = kern_sectors = 0;
pt_heads = pt_sectors = 0;
get_kernel_geometry();
get_partition_table_geometry();
g_heads = user_heads ? user_heads :
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pt_heads ? pt_heads :
kern_heads ? kern_heads : 255;
g_sectors = user_sectors ? user_sectors :
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pt_sectors ? pt_sectors :
kern_sectors ? kern_sectors : 63;
total_number_of_sectors = bb_BLKGETSIZE_sectors(dev_fd);
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sector_offset = 1;
if (dos_compatible_flag)
sector_offset = g_sectors;
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g_cylinders = total_number_of_sectors / (g_heads * g_sectors * sec_fac);
if (!g_cylinders)
g_cylinders = user_cylinders;
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}
/*
* 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:
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* -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
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{
int i, fd;
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g_partitions = 4;
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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;
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pe->sectorbuffer = MBRbuffer;
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#if ENABLE_FEATURE_FDISK_WRITABLE
pe->changed = (what == CREATE_EMPTY_DOS);
#endif
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}
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#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);
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if (fd < 0) {
fd = open(disk_device, O_RDONLY);
if (fd < 0) {
if (what == TRY_ONLY)
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return 1;
fdisk_fatal(unable_to_open);
}
printf("'%s' is opened for read only\n", disk_device);
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}
xmove_fd(fd, dev_fd);
if (512 != full_read(dev_fd, MBRbuffer, 512)) {
if (what == TRY_ONLY) {
close_dev_fd();
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return 1;
}
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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
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get_geometry();
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update_units();
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#if ENABLE_FEATURE_SUN_LABEL
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if (check_sun_label())
return 0;
#endif
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#if ENABLE_FEATURE_SGI_LABEL
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if (check_sgi_label())
return 0;
#endif
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#if ENABLE_FEATURE_AIX_LABEL
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if (check_aix_label())
return 0;
#endif
#if ENABLE_FEATURE_GPT_LABEL
if (check_gpt_label())
return 0;
#endif
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#if ENABLE_FEATURE_OSF_LABEL
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if (check_osf_label()) {
possibly_osf_label = 1;
if (!valid_part_table_flag(MBRbuffer)) {
current_label_type = LABEL_OSF;
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return 0;
}
puts("This disk has both DOS and BSD magic.\n"
"Give the 'b' command to go to BSD mode.");
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}
#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) {
puts("Device contains neither a valid DOS "
"partition table, nor Sun, SGI, OSF or GPT "
"disklabel");
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#ifdef __sparc__
IF_FEATURE_SUN_LABEL(create_sunlabel();)
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#else
create_doslabel();
#endif
return 0;
}
/* TRY_ONLY: */
return -1;
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}
created_table:
#endif /* FEATURE_FDISK_WRITABLE */
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IF_FEATURE_FDISK_WRITABLE(warn_cylinders();)
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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);
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else
read_extended(i);
}
}
for (i = 3; i < g_partitions; i++) {
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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",
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pe->sectorbuffer[510],
pe->sectorbuffer[511],
i + 1);
IF_FEATURE_FDISK_WRITABLE(pe->changed = 1;)
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}
}
return 0;
}
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#if ENABLE_FEATURE_FDISK_WRITABLE
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/*
* 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)
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{
sector_t value;
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int default_ok = 1;
const char *fmt = "%s (%u-%u, default %u): ";
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if (dflt < low || dflt > high) {
fmt = "%s (%u-%u): ";
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default_ok = 0;
}
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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 != '+');
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if (*line_ptr == '+' || *line_ptr == '-') {
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int minus = (*line_ptr == '-');
unsigned scale_shift;
if (sizeof(value) <= sizeof(long))
value = strtoul(line_ptr + 1, NULL, 10);
else
value = strtoull(line_ptr + 1, NULL, 10);
/* (1) if 2nd char is digit, use_default = 0.
* (2) move line_ptr to first non-digit.
*/
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while (isdigit(*++line_ptr))
use_default = 0;
scale_shift = 0;
switch (*line_ptr | 0x20) {
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case 'k':
scale_shift = 10; /* 1024 */
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break;
/*
* fdisk from util-linux 2.31 seems to round '+NNNk' and '+NNNK' to megabytes,
* (512-byte) sector count of the partition does not equal NNN*2:
*
* Last sector, +sectors or +size{K,M,G,T,P} (1953792-1000215215, default 1000215215): +9727k
* Device Boot Start End Sectors Size Id Type
* /dev/sdaN 1953792 1972223 18432 9M 83 Linux <-- size exactly 9*1024*1024 bytes
*
* Last sector, +sectors or +size{K,M,G,T,P} (1953792-1000215215, default 1000215215): +9728k
* /dev/sdaN 1953792 1974271 20480 10M 83 Linux <-- size exactly 10*1024*1024 bytes
*
* If 'k' means 1000 bytes (not 1024), then 9728k = 9728*1000 = 9500*1024,
* exactly halfway from 9000 to 10000, which explains why it jumps to next mbyte
* at this value.
*
* 'm' does not seem to behave this way: it means 1024*1024 bytes.
*
* Not sure we want to copy this. If user says he wants 1234kbyte partition,
* we do _exactly that_: 1234kbytes = 2468 sectors.
*/
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case 'm':
scale_shift = 20; /* 1024*1024 */
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break;
case 'g':
scale_shift = 30; /* 1024*1024*1024 */
break;
case 't':
scale_shift = 40; /* 1024*1024*1024*1024 */
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break;
default:
break;
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}
if (scale_shift) {
ullong bytes;
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unsigned long unit;
bytes = (ullong) value << scale_shift;
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unit = sector_size * units_per_sector;
bytes += unit/2; /* round */
bytes /= unit;
value = (bytes != 0 ? bytes - 1 : 0);
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}
if (minus)
value = -value;
value += base;
} else {
if (sizeof(value) <= sizeof(long))
value = strtoul(line_ptr, NULL, 10);
else
value = strtoull(line_ptr, NULL, 10);
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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)
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break;
puts("Value is out of range");
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}
return value;
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}
static unsigned
get_partition(int warn, unsigned max)
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{
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struct pte *pe;
unsigned i;
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i = read_int(1, 0, max, 0, "Partition number") - 1;
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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);
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}
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}
return i;
}
static int
get_existing_partition(int warn, unsigned max)
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{
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int pno = -1;
unsigned i;
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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);
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return pno;
}
puts("No partition is defined yet!");
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return -1;
not_unique:
return get_partition(warn, max);
}
static int
get_nonexisting_partition(void)
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{
const int max = 4;
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int pno = -1;
unsigned i;
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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);
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return pno;
}
puts("All primary partitions have been defined already!");
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return -1;
not_unique:
return get_partition(/*warn*/ 0, max);
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}
static void
change_units(void)
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{
display_in_cyl_units = !display_in_cyl_units;
update_units();
printf("Changing display/entry units to %ss\n",
str_units());
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}
static void
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toggle_active(int i)
{
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struct pte *pe = &ptes[i];
struct partition *p = pe->part_table;
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if (IS_EXTENDED(p->sys_ind) && !p->boot_ind)
printf("WARNING: Partition %u is an extended partition\n", i + 1);
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p->boot_ind = (p->boot_ind ? 0 : ACTIVE_FLAG);
pe->changed = 1;
}
static void
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toggle_dos_compatibility_flag(void)
{
dos_compatible_flag = 1 - dos_compatible_flag;
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if (dos_compatible_flag) {
sector_offset = g_sectors;
printf("DOS Compatibility flag is %sset\n", "");
} else {
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sector_offset = 1;
printf("DOS Compatibility flag is %sset\n", "not ");
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}
}
static void
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delete_partition(int i)
{
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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) {
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sun_delete_partition(i);
return;
}
if (LABEL_IS_SGI) {
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sgi_delete_partition(i);
return;
}
if (i < 4) {
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if (IS_EXTENDED(p->sys_ind) && i == ext_index) {
g_partitions = 4;
2002-11-27 03:30:21 +05:30
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;
2002-11-27 03:30:21 +05:30
--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 */
2002-11-27 03:30:21 +05:30
/* 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;
2002-11-27 03:30:21 +05:30
pe->changed = 1;
}
if (g_partitions > 5) {
g_partitions--;
while (i < g_partitions) {
2002-11-27 03:30:21 +05:30
ptes[i] = ptes[i+1];
i++;
}
} else {
2002-11-27 03:30:21 +05:30
/* the only logical: clear only */
clear_partition(ptes[i].part_table);
}
2002-11-27 03:30:21 +05:30
}
}
static void
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change_sysid(void)
{
2002-11-27 03:30:21 +05:30
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);
}
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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());
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if (!sys && !LABEL_IS_SGI && !LABEL_IS_SUN) {
puts("Type 0 means free space to many systems\n"
"(but not to Linux). Having partitions of\n"
"type 0 is probably unwise.");
2002-11-27 03:30:21 +05:30
/* break; */
}
if (!LABEL_IS_SUN && !LABEL_IS_SGI) {
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if (IS_EXTENDED(sys) != IS_EXTENDED(p->sys_ind)) {
puts("You cannot change a partition into"
" an extended one or vice versa");
2002-11-27 03:30:21 +05:30
break;
}
}
if (sys < 256) {
#if ENABLE_FEATURE_SUN_LABEL
if (LABEL_IS_SUN && i == 2 && sys != SUN_WHOLE_DISK)
puts("Consider leaving partition 3 "
"as Whole disk (5),\n"
"as SunOS/Solaris expects it and "
"even Linux likes it\n");
#endif
#if ENABLE_FEATURE_SGI_LABEL
if (LABEL_IS_SGI &&
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(
(i == 10 && sys != SGI_ENTIRE_DISK) ||
2006-02-25 09:16:10 +05:30
(i == 8 && sys != 0)
)
) {
puts("Consider leaving partition 9 "
"as volume header (0),\nand "
"partition 11 as entire volume (6)"
"as IRIX expects it\n");
2006-02-25 09:16:10 +05:30
}
#endif
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if (sys == origsys)
break;
if (LABEL_IS_SUN) {
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sun_change_sysid(i, sys);
} else if (LABEL_IS_SGI) {
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sgi_change_sysid(i, sys);
} else
p->sys_ind = sys;
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printf("Changed system type of partition %u "
"to %x (%s)\n", i + 1, sys,
partition_type(sys));
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ptes[i].changed = 1;
//if (is_dos_partition(origsys) || is_dos_partition(sys))
// dos_changed = 1;
2002-11-27 03:30:21 +05:30
break;
}
}
}
#endif /* FEATURE_FDISK_WRITABLE */
2002-11-27 03:30:21 +05:30
/* check_consistency() and linear2chs() added Sat Mar 6 12:28:16 1993,
2002-11-27 03:30:21 +05:30
* 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). */
2006-02-24 21:59:00 +05:30
static void
linear2chs(unsigned ls, unsigned *c, unsigned *h, unsigned *s)
2006-02-24 21:59:00 +05:30
{
int spc = g_heads * g_sectors;
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*c = ls / spc;
ls = ls % spc;
*h = ls / g_sectors;
*s = ls % g_sectors + 1; /* sectors count from 1 */
2002-11-27 03:30:21 +05:30
}
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static void
check_consistency(const struct partition *p, int partition)
{
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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 */
2002-11-27 03:30:21 +05:30
if (!g_heads || !g_sectors || (partition >= 4))
2002-11-27 03:30:21 +05:30
return; /* do not check extended partitions */
/* physical beginning c, h, s */
pbc = cylinder(p->sector, p->cyl);
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pbh = p->head;
pbs = sector(p->sector);
2002-11-27 03:30:21 +05:30
/* physical ending c, h, s */
pec = cylinder(p->end_sector, p->end_cyl);
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peh = p->end_head;
pes = sector(p->end_sector);
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/* compute logical beginning (c, h, s) */
linear2chs(get_start_sect(p), &lbc, &lbh, &lbs);
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/* compute logical ending (c, h, s) */
linear2chs(get_start_sect(p) + get_nr_sects(p) - 1, &lec, &leh, &les);
2002-11-27 03:30:21 +05:30
/* Same physical / logical beginning? */
if (g_cylinders <= 1024 && (pbc != lbc || pbh != lbh || pbs != lbs)) {
printf("Partition %u has different physical/logical "
"start (non-Linux?):\n", partition + 1);
printf(" phys=(%u,%u,%u) ", pbc, pbh, pbs);
printf("logical=(%u,%u,%u)\n", lbc, lbh, lbs);
2002-11-27 03:30:21 +05:30
}
/* Same physical / logical ending? */
if (g_cylinders <= 1024 && (pec != lec || peh != leh || pes != les)) {
printf("Partition %u has different physical/logical "
"end:\n", partition + 1);
printf(" phys=(%u,%u,%u) ", pec, peh, pes);
printf("logical=(%u,%u,%u)\n", lec, leh, les);
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}
}
static void
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list_disk_geometry(void)
{
ullong xbytes = total_number_of_sectors / (1024*1024 / 512);
char x = 'M';
if (xbytes >= 10000) {
xbytes += 512; /* fdisk util-linux 2.28 does this */
xbytes /= 1024;
x = 'G';
}
printf("Disk %s: %llu %cB, %llu bytes, %"SECT_FMT"u sectors\n"
"%u cylinders, %u heads, %u sectors/track\n"
"Units: %ss of %u * %u = %u bytes\n"
"\n",
disk_device, xbytes, x,
((ullong)total_number_of_sectors * 512), total_number_of_sectors,
g_cylinders, g_heads, g_sectors,
str_units(),
units_per_sector, sector_size, units_per_sector * sector_size
);
2002-11-27 03:30:21 +05:30
}
/*
* 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
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wrong_p_order(int *prev)
{
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const struct pte *pe;
const struct partition *p;
sector_t last_p_start_pos = 0, p_start_pos;
unsigned i, last_i = 0;
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for (i = 0; i < g_partitions; i++) {
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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);
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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;
}
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#if ENABLE_FEATURE_FDISK_ADVANCED
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/*
* 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
2006-02-24 21:59:00 +05:30
fix_chain_of_logicals(void)
{
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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;
2002-11-27 03:30:21 +05:30
if (oj > ojj) {
ptes[j].offset_from_dev_start = ojj;
ptes[j+1].offset_from_dev_start = oj;
2002-11-27 03:30:21 +05:30
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,
2006-02-24 21:59:00 +05:30
ojj-extended_offset);
2002-11-27 03:30:21 +05:30
set_start_sect(ptes[j].ext_pointer,
2006-02-24 21:59:00 +05:30
oj-extended_offset);
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goto stage1;
}
}
/* Stage 2: sort starting sectors */
stage2:
for (j = 4; j < g_partitions - 1; j++) {
2002-11-27 03:30:21 +05:30
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;
2002-11-27 03:30:21 +05:30
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++)
2002-11-27 03:30:21 +05:30
ptes[j].changed = 1;
}
static void
2006-02-24 21:59:00 +05:30
fix_partition_table_order(void)
{
2002-11-27 03:30:21 +05:30
struct pte *pei, *pek;
int i,k;
if (!wrong_p_order(NULL)) {
puts("Ordering is already correct\n");
2002-11-27 03:30:21 +05:30
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();
puts("Done");
2002-11-27 03:30:21 +05:30
}
#endif
static const char *
chs_string11(unsigned cyl, unsigned head, unsigned sect)
{
char *buf = auto_string(xzalloc(sizeof(int)*3 * 3));
sprintf(buf, "%u,%u,%u", cylinder(sect,cyl), head, sector(sect));
return buf;
}
2002-11-27 03:30:21 +05:30
static void
2006-02-24 21:59:00 +05:30
list_table(int xtra)
{
2002-11-27 03:30:21 +05:30
int i, w;
if (LABEL_IS_SUN) {
2002-11-27 03:30:21 +05:30
sun_list_table(xtra);
return;
}
if (LABEL_IS_SGI) {
2002-11-27 03:30:21 +05:30
sgi_list_table(xtra);
return;
}
if (LABEL_IS_GPT) {
gpt_list_table(xtra);
return;
}
2002-11-27 03:30:21 +05:30
list_disk_geometry();
if (LABEL_IS_OSF) {
2002-11-27 03:30:21 +05:30
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.
*/
2002-11-27 03:30:21 +05:30
w = strlen(disk_device);
if (w && isdigit(disk_device[w-1]))
w++;
if (w < 7)
w = 7;
2002-11-27 03:30:21 +05:30
printf("%-*s Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type\n",
w-1, "Device");
2002-11-27 03:30:21 +05:30
for (i = 0; i < g_partitions; i++) {
const struct partition *p;
2002-11-27 03:30:21 +05:30
const struct pte *pe = &ptes[i];
char boot4[4];
char numstr6[6];
sector_t start_sect;
sector_t end_sect;
sector_t nr_sects;
2002-11-27 03:30:21 +05:30
p = pe->part_table;
if (!p || is_cleared_partition(p))
continue;
2002-11-27 03:30:21 +05:30
sprintf(boot4, "%02x", p->boot_ind);
if ((p->boot_ind & 0x7f) == 0) {
/* 0x80 shown as '*', 0x00 is ' ' */
boot4[0] = p->boot_ind ? '*' : ' ';
boot4[1] = ' ';
}
start_sect = get_partition_start_from_dev_start(pe);
end_sect = start_sect;
nr_sects = get_nr_sects(p);
if (nr_sects != 0)
end_sect += nr_sects - 1;
smart_ulltoa5((ullong)nr_sects * sector_size,
numstr6, " KMGTPEZY")[0] = '\0';
#define SFMT SECT_FMT
// Boot StartCHS EndCHS StartLBA EndLBA Sectors Size Id Type
printf("%s%s %-11s"/**/" %-11s"/**/" %10"SFMT"u %10"SFMT"u %10"SFMT"u %s %2x %s\n",
partname(disk_device, i+1, w+2),
boot4,
chs_string11(p->cyl, p->head, p->sector),
chs_string11(p->end_cyl, p->end_head, p->end_sector),
start_sect,
end_sect,
nr_sects,
numstr6,
p->sys_ind,
partition_type(p->sys_ind)
);
#undef SFMT
check_consistency(p, i);
2002-11-27 03:30:21 +05:30
}
/* 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)) {
2006-02-25 09:16:10 +05:30
/* FIXME */
puts("\nPartition table entries are not in disk order");
2002-11-27 03:30:21 +05:30
}
}
2006-11-29 17:30:28 +05:30
#if ENABLE_FEATURE_FDISK_ADVANCED
2002-11-27 03:30:21 +05:30
static void
2006-02-24 21:59:00 +05:30
x_list_table(int extend)
{
2002-11-27 03:30:21 +05:30
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);
puts("Nr AF Hd Sec Cyl Hd Sec Cyl Start Size ID");
for (i = 0; i < g_partitions; i++) {
2002-11-27 03:30:21 +05:30
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,
2002-11-27 03:30:21 +05:30
sector(p->sector),
cylinder(p->sector, p->cyl),
p->end_head,
2002-11-27 03:30:21 +05:30
sector(p->end_sector),
cylinder(p->end_sector, p->end_cyl),
get_start_sect(p),
get_nr_sects(p),
p->sys_ind
);
2002-11-27 03:30:21 +05:30
if (p->sys_ind)
check_consistency(p, i);
}
}
}
#endif
2006-11-29 17:30:28 +05:30
#if ENABLE_FEATURE_FDISK_WRITABLE
2002-11-27 03:30:21 +05:30
static void
fill_bounds(sector_t *first, sector_t *last)
2006-02-24 21:59:00 +05:30
{
unsigned i;
2002-11-27 03:30:21 +05:30
const struct pte *pe = &ptes[0];
const struct partition *p;
for (i = 0; i < g_partitions; pe++,i++) {
2002-11-27 03:30:21 +05:30
p = pe->part_table;
2006-02-24 21:59:00 +05:30
if (!p->sys_ind || IS_EXTENDED(p->sys_ind)) {
2002-11-27 03:30:21 +05:30
first[i] = 0xffffffff;
last[i] = 0;
} else {
first[i] = get_partition_start_from_dev_start(pe);
2002-11-27 03:30:21 +05:30
last[i] = first[i] + get_nr_sects(p) - 1;
}
}
}
static void
check(int n, unsigned h, unsigned s, unsigned c, sector_t start)
2006-02-24 21:59:00 +05:30
{
sector_t total, real_s, real_c;
2002-11-27 03:30:21 +05:30
real_s = sector(s) - 1;
real_c = cylinder(s, c);
total = (real_c * g_sectors + real_s) * g_heads + h;
2002-11-27 03:30:21 +05:30
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);
2002-11-27 03:30:21 +05:30
}
static void
2006-02-24 21:59:00 +05:30
verify(void)
{
2002-11-27 03:30:21 +05:30
int i, j;
sector_t total = 1;
sector_t chs_size;
sector_t first[g_partitions], last[g_partitions];
2002-11-27 03:30:21 +05:30
struct partition *p;
if (warn_geometry())
return;
if (LABEL_IS_SUN) {
2002-11-27 03:30:21 +05:30
verify_sun();
return;
}
if (LABEL_IS_SGI) {
2002-11-27 03:30:21 +05:30
verify_sgi(1);
return;
}
fill_bounds(first, last);
for (i = 0; i < g_partitions; i++) {
2002-11-27 03:30:21 +05:30
struct pte *pe = &ptes[i];
p = pe->part_table;
2006-02-24 21:59:00 +05:30
if (p->sys_ind && !IS_EXTENDED(p->sys_ind)) {
2002-11-27 03:30:21 +05:30
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);
2002-11-27 03:30:21 +05:30
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];
}
2002-11-27 03:30:21 +05:30
}
}
}
if (extended_offset) {
struct pte *pex = &ptes[ext_index];
sector_t e_last = get_start_sect(pex->part_table) +
2002-11-27 03:30:21 +05:30
get_nr_sects(pex->part_table) - 1;
for (i = 4; i < g_partitions; i++) {
2002-11-27 03:30:21 +05:30
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);
2002-11-27 03:30:21 +05:30
}
}
}
chs_size = (sector_t)g_heads * g_sectors * g_cylinders;
if (total > chs_size)
printf("Total allocated sectors %u"
" greater than CHS size %"SECT_FMT"u\n",
total, chs_size
);
else {
total = chs_size - total;
if (total != 0)
printf("%"SECT_FMT"u unallocated sectors\n", total);
}
2002-11-27 03:30:21 +05:30
}
static void
2006-02-24 21:59:00 +05:30
add_partition(int n, int sys)
{
2002-11-27 03:30:21 +05:30
char mesg[256]; /* 48 does not suffice in Japanese */
2006-05-26 07:18:17 +05:30
int i, num_read = 0;
2002-11-27 03:30:21 +05:30
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];
2002-11-27 03:30:21 +05:30
if (p && p->sys_ind) {
printf(msg_part_already_defined, n + 1);
2002-11-27 03:30:21 +05:30
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;
2002-11-27 03:30:21 +05:30
else
limit = total_number_of_sectors - 1;
2002-11-27 03:30:21 +05:30
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++)
2002-11-27 03:30:21 +05:30
first[i] = (cround(first[i]) - 1) * units_per_sector;
snprintf(mesg, sizeof(mesg), "First %s", str_units());
2002-11-27 03:30:21 +05:30
do {
temp = start;
for (i = 0; i < g_partitions; i++) {
2002-11-27 03:30:21 +05:30
int lastplusoff;
if (start == ptes[i].offset_from_dev_start)
2002-11-27 03:30:21 +05:30
start += sector_offset;
2006-02-24 21:59:00 +05:30
lastplusoff = last[i] + ((n < 4) ? 0 : sector_offset);
2002-11-27 03:30:21 +05:30
if (start >= first[i] && start <= lastplusoff)
start = lastplusoff + 1;
}
if (start > limit)
break;
2006-05-26 07:18:17 +05:30
if (start >= temp+units_per_sector && num_read) {
printf("Sector %"SECT_FMT"u is already allocated\n", temp);
2002-11-27 03:30:21 +05:30
temp = start;
2006-05-26 07:18:17 +05:30
num_read = 0;
2002-11-27 03:30:21 +05:30
}
2006-05-26 07:18:17 +05:30
if (!num_read && start == temp) {
sector_t saved_start;
2002-11-27 03:30:21 +05:30
saved_start = start;
start = read_int(cround(saved_start), cround(saved_start), cround(limit), 0, mesg);
2002-11-27 03:30:21 +05:30
if (display_in_cyl_units) {
start = (start - 1) * units_per_sector;
if (start < saved_start)
start = saved_start;
2002-11-27 03:30:21 +05:30
}
2006-05-26 07:18:17 +05:30
num_read = 1;
2002-11-27 03:30:21 +05:30
}
2006-05-26 07:18:17 +05:30
} while (start != temp || !num_read);
2002-11-27 03:30:21 +05:30
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++;
2002-11-27 03:30:21 +05:30
if (sector_offset == 1)
start++;
}
}
for (i = 0; i < g_partitions; i++) {
2002-11-27 03:30:21 +05:30
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;
2002-11-27 03:30:21 +05:30
if (start < first[i] && limit >= first[i])
limit = first[i] - 1;
}
if (start > limit) {
puts("No free sectors available");
2002-11-27 03:30:21 +05:30
if (n > 4)
g_partitions--;
2002-11-27 03:30:21 +05:30
return;
}
if (cround(start) == cround(limit)) {
stop = limit;
} else {
snprintf(mesg, sizeof(mesg),
"Last %s or +size{,K,M,G,T}",
str_units()
);
stop = read_int(cround(start), cround(limit), cround(limit), cround(start), mesg);
2002-11-27 03:30:21 +05:30
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);
2002-11-27 03:30:21 +05:30
2006-02-24 21:59:00 +05:30
if (IS_EXTENDED(sys)) {
2002-11-27 03:30:21 +05:30
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);
2002-11-27 03:30:21 +05:30
pe4->part_table = pt_offset(pe4->sectorbuffer, 0);
pe4->ext_pointer = pe4->part_table + 1;
pe4->changed = 1;
g_partitions = 5;
2002-11-27 03:30:21 +05:30
}
}
static void
2006-02-24 21:59:00 +05:30
add_logical(void)
{
if (g_partitions > 5 || ptes[4].part_table->sys_ind) {
struct pte *pe = &ptes[g_partitions];
2002-11-27 03:30:21 +05:30
pe->sectorbuffer = xzalloc(sector_size);
2002-11-27 03:30:21 +05:30
pe->part_table = pt_offset(pe->sectorbuffer, 0);
pe->ext_pointer = pe->part_table + 1;
pe->offset_from_dev_start = 0;
2002-11-27 03:30:21 +05:30
pe->changed = 1;
g_partitions++;
2002-11-27 03:30:21 +05:30
}
add_partition(g_partitions - 1, LINUX_NATIVE);
2002-11-27 03:30:21 +05:30
}
static void
2006-02-24 21:59:00 +05:30
new_partition(void)
{
2002-11-27 03:30:21 +05:30
int i, free_primary = 0;
if (warn_geometry())
return;
if (LABEL_IS_SUN) {
add_sun_partition(get_partition(0, g_partitions), LINUX_NATIVE);
2002-11-27 03:30:21 +05:30
return;
}
if (LABEL_IS_SGI) {
sgi_add_partition(get_partition(0, g_partitions), LINUX_NATIVE);
2002-11-27 03:30:21 +05:30
return;
}
if (LABEL_IS_AIX) {
puts("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.");
2002-11-27 03:30:21 +05:30
return;
}
for (i = 0; i < 4; i++)
free_primary += !ptes[i].part_table->sys_ind;
if (!free_primary && g_partitions >= MAXIMUM_PARTS) {
puts("The maximum number of partitions has been created");
return;
2006-02-24 21:59:00 +05:30
}
2002-11-27 03:30:21 +05:30
if (!free_primary) {
if (extended_offset)
add_logical();
else
puts("You must delete some partition and add "
"an extended partition first");
2002-11-27 03:30:21 +05:30
} else {
char c, line[80];
snprintf(line, sizeof(line),
"Partition type\n"
" p primary partition (1-4)\n"
" %s\n",
(extended_offset ?
"l logical (5 or over)" : "e extended"));
2002-11-27 03:30:21 +05:30
while (1) {
c = read_nonempty(line);
c |= 0x20; /* lowercase */
if (c == 'p') {
i = get_nonexisting_partition();
2002-11-27 03:30:21 +05:30
if (i >= 0)
add_partition(i, LINUX_NATIVE);
return;
}
if (c == 'l' && extended_offset) {
2002-11-27 03:30:21 +05:30
add_logical();
return;
}
if (c == 'e' && !extended_offset) {
i = get_nonexisting_partition();
2002-11-27 03:30:21 +05:30
if (i >= 0)
add_partition(i, EXTENDED);
return;
}
printf("Invalid partition number "
"for type '%c'\n", c);
2002-11-27 03:30:21 +05:30
}
}
}
static void
reread_partition_table(int leave)
{
int i;
puts("Calling ioctl() to re-read partition table");
sync();
/* Users with slow external USB disks on a 320MHz ARM system (year 2011)
* report that sleep is needed, otherwise BLKRRPART may fail with -EIO:
*/
sleep(1);
i = ioctl_or_perror(dev_fd, BLKRRPART, NULL,
"WARNING: rereading partition table "
"failed, kernel still uses old table");
#if 0
if (dos_changed)
puts(
"\nWARNING: If you have created or modified any DOS 6.x\n"
"partitions, please see the fdisk manual page for additional\n"
"information");
#endif
if (leave) {
if (ENABLE_FEATURE_CLEAN_UP)
close_dev_fd();
exit(i != 0);
}
}
2002-11-27 03:30:21 +05:30
static void
2006-02-24 21:59:00 +05:30
write_table(void)
{
2002-11-27 03:30:21 +05:30
int i;
if (LABEL_IS_DOS) {
2006-02-24 21:59:00 +05:30
for (i = 0; i < 3; i++)
2002-11-27 03:30:21 +05:30
if (ptes[i].changed)
ptes[3].changed = 1;
for (i = 3; i < g_partitions; i++) {
2002-11-27 03:30:21 +05:30
struct pte *pe = &ptes[i];
if (pe->changed) {
write_part_table_flag(pe->sectorbuffer);
write_sector(pe->offset_from_dev_start, pe->sectorbuffer);
2002-11-27 03:30:21 +05:30
}
}
}
else if (LABEL_IS_SGI) {
/* no test on change? the "altered" msg below might be mistaken */
2002-11-27 03:30:21 +05:30
sgi_write_table();
}
else if (LABEL_IS_SUN) {
for (i = 0; i < 8; i++) {
if (ptes[i].changed) {
sun_write_table();
break;
}
}
2002-11-27 03:30:21 +05:30
}
puts("The partition table has been altered.");
reread_partition_table(1);
2002-11-27 03:30:21 +05:30
}
#endif /* FEATURE_FDISK_WRITABLE */
2002-11-27 03:30:21 +05:30
2006-11-29 17:30:28 +05:30
#if ENABLE_FEATURE_FDISK_ADVANCED
2002-11-27 03:30:21 +05:30
#define MAX_PER_LINE 16
static void
2006-02-24 21:59:00 +05:30
print_buffer(char *pbuffer)
{
int i,l;
2002-11-27 03:30:21 +05:30
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');
2002-11-27 03:30:21 +05:30
l = -1;
}
}
if (l > 0)
bb_putchar('\n');
bb_putchar('\n');
2002-11-27 03:30:21 +05:30
}
static void
2006-02-24 21:59:00 +05:30
print_raw(void)
{
2002-11-27 03:30:21 +05:30
int i;
printf("Device: %s\n", disk_device);
if (LABEL_IS_SGI || LABEL_IS_SUN)
2002-11-27 03:30:21 +05:30
print_buffer(MBRbuffer);
else {
for (i = 3; i < g_partitions; i++)
2002-11-27 03:30:21 +05:30
print_buffer(ptes[i].sectorbuffer);
}
2002-11-27 03:30:21 +05:30
}
static void
move_begin(unsigned i)
2006-02-24 21:59:00 +05:30
{
2002-11-27 03:30:21 +05:30
struct pte *pe = &ptes[i];
struct partition *p = pe->part_table;
sector_t new, first, nr_sects;
2002-11-27 03:30:21 +05:30
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);
2002-11-27 03:30:21 +05:30
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);
2002-11-27 03:30:21 +05:30
pe->changed = 1;
}
}
static void
2006-02-24 21:59:00 +05:30
xselect(void)
{
2002-11-27 03:30:21 +05:30
char c;
2006-02-24 21:59:00 +05:30
while (1) {
bb_putchar('\n');
c = 0x20 | read_nonempty("Expert command (m for help): ");
2002-11-27 03:30:21 +05:30
switch (c) {
case 'a':
if (LABEL_IS_SUN)
2002-11-27 03:30:21 +05:30
sun_set_alt_cyl();
break;
case 'b':
if (LABEL_IS_DOS)
move_begin(get_partition(0, g_partitions));
2002-11-27 03:30:21 +05:30
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)
2002-11-27 03:30:21 +05:30
warn_cylinders();
break;
case 'd':
print_raw();
break;
case 'e':
if (LABEL_IS_SGI)
2002-11-27 03:30:21 +05:30
sgi_set_xcyl();
else if (LABEL_IS_SUN)
2002-11-27 03:30:21 +05:30
sun_set_xcyl();
else if (LABEL_IS_DOS)
2002-11-27 03:30:21 +05:30
x_list_table(1);
break;
case 'f':
if (LABEL_IS_DOS)
2002-11-27 03:30:21 +05:30
fix_partition_table_order();
break;
case 'g':
2006-11-29 17:30:28 +05:30
#if ENABLE_FEATURE_SGI_LABEL
2002-11-27 03:30:21 +05:30
create_sgilabel();
#endif
break;
case 'h':
user_heads = g_heads = read_int(1, g_heads, 256, 0, "Number of heads");
2002-11-27 03:30:21 +05:30
update_units();
break;
case 'i':
if (LABEL_IS_SUN)
2002-11-27 03:30:21 +05:30
sun_set_ilfact();
break;
case 'o':
if (LABEL_IS_SUN)
2002-11-27 03:30:21 +05:30
sun_set_rspeed();
break;
case 'p':
if (LABEL_IS_SUN)
2002-11-27 03:30:21 +05:30
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);
2002-11-27 03:30:21 +05:30
case 'r':
return;
case 's':
user_sectors = g_sectors = read_int(1, g_sectors, 63, 0, "Number of sectors");
2002-11-27 03:30:21 +05:30
if (dos_compatible_flag) {
sector_offset = g_sectors;
puts("Warning: setting sector offset for DOS "
"compatibility");
2002-11-27 03:30:21 +05:30
}
update_units();
break;
case 'v':
verify();
break;
case 'w':
write_table(); /* does not return */
break;
case 'y':
if (LABEL_IS_SUN)
2002-11-27 03:30:21 +05:30
sun_set_pcylcount();
break;
default:
xmenu();
}
}
}
#endif /* ADVANCED mode */
static int
2006-02-24 21:59:00 +05:30
is_ide_cdrom_or_tape(const char *device)
{
2002-11-27 03:30:21 +05:30
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. */
libbb: introduce and use is_prefixed_with() function old new delta is_prefixed_with - 18 +18 complete_username 78 77 -1 man_main 737 735 -2 fsck_device 429 427 -2 unpack_ar_archive 80 76 -4 strip_unsafe_prefix 105 101 -4 singlemount 1054 1050 -4 rtc_adjtime_is_utc 90 86 -4 resolve_mount_spec 88 84 -4 parse_one_line 1029 1025 -4 parse_conf 1460 1456 -4 may_wakeup 83 79 -4 loadkmap_main 219 215 -4 get_irqs_from_stat 103 99 -4 get_header_cpio 913 909 -4 findfs_main 79 75 -4 fbsplash_main 1230 1226 -4 load_crontab 776 771 -5 expand_vars_to_list 1151 1146 -5 date_main 881 876 -5 skip_dev_pfx 30 24 -6 make_device 2199 2193 -6 complete_cmd_dir_file 773 767 -6 run_applet_and_exit 715 708 -7 uudecode_main 321 313 -8 pwdx_main 197 189 -8 execute 568 560 -8 i2cdetect_main 1186 1176 -10 procps_scan 1242 1230 -12 procps_read_smaps 1017 1005 -12 process_module 746 734 -12 patch_main 1903 1891 -12 nfsmount 3572 3560 -12 stack_machine 126 112 -14 process_timer_stats 449 435 -14 match_fstype 111 97 -14 do_ipaddr 1344 1330 -14 open_list_and_close 359 343 -16 get_header_tar 1795 1779 -16 prepend_new_eth_table 340 323 -17 fsck_main 1811 1794 -17 find_iface_state 56 38 -18 dnsd_main 1321 1303 -18 base_device 179 158 -21 find_keyword 104 82 -22 handle_incoming_and_exit 2785 2762 -23 parse_and_put_prompt 774 746 -28 modinfo 347 317 -30 find_action 204 171 -33 update_passwd 1470 1436 -34 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/49 up/down: 18/-540) Total: -522 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-03-12 22:18:34 +05:30
if (!is_prefixed_with(device, "/dev/hd"))
2002-11-27 03:30:21 +05:30
return 0;
snprintf(buf, sizeof(buf), "/proc/ide/%s/media", device+5);
procf = fopen_for_read(buf);
2002-11-27 03:30:21 +05:30
if (procf != NULL && fgets(buf, sizeof(buf), procf))
libbb: introduce and use is_prefixed_with() function old new delta is_prefixed_with - 18 +18 complete_username 78 77 -1 man_main 737 735 -2 fsck_device 429 427 -2 unpack_ar_archive 80 76 -4 strip_unsafe_prefix 105 101 -4 singlemount 1054 1050 -4 rtc_adjtime_is_utc 90 86 -4 resolve_mount_spec 88 84 -4 parse_one_line 1029 1025 -4 parse_conf 1460 1456 -4 may_wakeup 83 79 -4 loadkmap_main 219 215 -4 get_irqs_from_stat 103 99 -4 get_header_cpio 913 909 -4 findfs_main 79 75 -4 fbsplash_main 1230 1226 -4 load_crontab 776 771 -5 expand_vars_to_list 1151 1146 -5 date_main 881 876 -5 skip_dev_pfx 30 24 -6 make_device 2199 2193 -6 complete_cmd_dir_file 773 767 -6 run_applet_and_exit 715 708 -7 uudecode_main 321 313 -8 pwdx_main 197 189 -8 execute 568 560 -8 i2cdetect_main 1186 1176 -10 procps_scan 1242 1230 -12 procps_read_smaps 1017 1005 -12 process_module 746 734 -12 patch_main 1903 1891 -12 nfsmount 3572 3560 -12 stack_machine 126 112 -14 process_timer_stats 449 435 -14 match_fstype 111 97 -14 do_ipaddr 1344 1330 -14 open_list_and_close 359 343 -16 get_header_tar 1795 1779 -16 prepend_new_eth_table 340 323 -17 fsck_main 1811 1794 -17 find_iface_state 56 38 -18 dnsd_main 1321 1303 -18 base_device 179 158 -21 find_keyword 104 82 -22 handle_incoming_and_exit 2785 2762 -23 parse_and_put_prompt 774 746 -28 modinfo 347 317 -30 find_action 204 171 -33 update_passwd 1470 1436 -34 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 0/49 up/down: 18/-540) Total: -522 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-03-12 22:18:34 +05:30
is_ide = (is_prefixed_with(buf, "cdrom") ||
is_prefixed_with(buf, "tape"));
2002-11-27 03:30:21 +05:30
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;
}
2006-02-25 09:16:10 +05:30
2002-11-27 03:30:21 +05:30
static void
open_list_and_close(const char *device, int user_specified)
2006-02-24 21:59:00 +05:30
{
2002-11-27 03:30:21 +05:30
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 */
2002-11-27 03:30:21 +05:30
/* 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);
2002-11-27 03:30:21 +05:30
}
#endif
2002-11-27 03:30:21 +05:30
}
ret:
close_dev_fd();
2002-11-27 03:30:21 +05:30
}
/* Is it a whole disk? The digit check is still useful
for Xen devices for example. */
static int is_whole_disk(const char *disk)
{
unsigned len;
int fd = open(disk, O_RDONLY);
if (fd != -1) {
struct hd_geometry geometry;
int err = ioctl(fd, HDIO_GETGEO, &geometry);
close(fd);
if (!err)
return (geometry.start == 0);
}
/* Treat "nameN" as a partition name, not whole disk */
/* note: mmcblk0 should work from the geometry check above */
len = strlen(disk);
if (len != 0 && isdigit(disk[len - 1]))
return 0;
return 1;
}
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/* 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)
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{
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FILE *procpt;
char line[100], ptname[100], devname[120];
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int ma, mi, sz;
procpt = fopen_or_warn("/proc/partitions", "r");
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while (fgets(line, sizeof(line), procpt)) {
if (sscanf(line, " %u %u %u %[^\n ]",
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&ma, &mi, &sz, ptname) != 4)
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continue;
sprintf(devname, "/dev/%s", ptname);
if (is_whole_disk(devname))
open_list_and_close(devname, 0);
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}
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#if ENABLE_FEATURE_CLEAN_UP
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fclose(procpt);
#endif
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}
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#if ENABLE_FEATURE_FDISK_WRITABLE
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static void
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unknown_command(int c)
{
printf("%c: unknown command\n", c);
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}
#endif
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int fdisk_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int fdisk_main(int argc UNUSED_PARAM, char **argv)
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{
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unsigned opt;
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/*
* 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 = getopt32(argv, "b:+C:+H:+lS:+u" IF_FEATURE_FDISK_BLKSIZE("s"),
&sector_size, &user_cylinders, &user_heads, &user_sectors);
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argv += optind;
if (opt & OPT_b) {
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/* 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 */
) {
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bb_show_usage();
}
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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
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#if ENABLE_FEATURE_FDISK_WRITABLE
if (opt & OPT_l) {
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nowarn = 1;
#endif
if (*argv) {
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listing = 1;
do {
open_list_and_close(*argv, 1);
} while (*++argv);
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} else {
/* we don't have device names, */
/* use /proc/partitions instead */
list_devs_in_proc_partititons();
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}
return 0;
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#if ENABLE_FEATURE_FDISK_WRITABLE
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}
#endif
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#if ENABLE_FEATURE_FDISK_BLKSIZE
if (opt & OPT_s) {
int j;
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nowarn = 1;
if (!argv[0])
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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;
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close(fd);
if (argv[1])
printf("%llu\n", size);
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else
printf("%s: %llu\n", argv[j], size);
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}
return 0;
}
#endif
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#if ENABLE_FEATURE_FDISK_WRITABLE
if (!argv[0] || argv[1])
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bb_show_usage();
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disk_device = argv[0];
get_boot(OPEN_MAIN);
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if (LABEL_IS_OSF) {
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/* OSF label, and no DOS label */
printf("Detected an OSF/1 disklabel on %s, entering "
"disklabel mode\n", disk_device);
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bsd_select();
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/*Why do we do this? It seems to be counter-intuitive*/
current_label_type = LABEL_DOS;
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/* 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): ");
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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),
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0x01);
else if (LABEL_IS_SGI)
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sgi_set_bootpartition(
get_partition(1, g_partitions));
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else
unknown_command(c);
break;
case 'b':
if (LABEL_IS_SGI) {
printf("\nThe current boot file is: %s\n",
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sgi_get_bootfile());
if (read_maybe_empty("Please enter the name of the "
"new boot file: ") == '\n')
puts("Boot file unchanged");
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else
sgi_set_bootfile(line_ptr);
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}
#if ENABLE_FEATURE_OSF_LABEL
else
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bsd_select();
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#endif
break;
case 'c':
if (LABEL_IS_DOS)
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toggle_dos_compatibility_flag();
else if (LABEL_IS_SUN)
toggle_sunflags(get_partition(1, g_partitions),
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0x10);
else if (LABEL_IS_SGI)
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sgi_set_swappartition(
get_partition(1, g_partitions));
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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);
}
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break;
case 'i':
if (LABEL_IS_SGI)
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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');
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return 0;
case 's':
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#if ENABLE_FEATURE_SUN_LABEL
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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 */
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break;
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#if ENABLE_FEATURE_FDISK_ADVANCED
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case 'x':
if (LABEL_IS_SGI) {
puts("\n\tSorry, no experts menu for SGI "
"partition tables available\n");
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} else
xselect();
break;
#endif
default:
unknown_command(c);
menu();
}
}
return 0;
#endif /* FEATURE_FDISK_WRITABLE */
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}