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busybox/util-linux/fdisk.c
Denis Vlasenko 8e1c71529c Convert cmdedit into more generic line input facility 
(make history and completion optional at runtime).
Use it for fdisk, as an example.
Some unrelated fixes in fdisk are also here.
2007-01-22 07:21:38 +00:00

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/* vi: set sw=4 ts=4: */
/* fdisk.c -- Partition table manipulator for Linux.
*
* Copyright (C) 1992 A. V. Le Blanc (LeBlanc@mcc.ac.uk)
* Copyright (C) 2001,2002 Vladimir Oleynik <dzo@simtreas.ru> (initial bb port)
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
#include <assert.h> /* assert */
#include "busybox.h"
#define _(x) x
/* Looks like someone forgot to add this to config system */
#ifndef ENABLE_FEATURE_FDISK_BLKSIZE
# define ENABLE_FEATURE_FDISK_BLKSIZE 0
# define USE_FEATURE_FDISK_BLKSIZE(a)
#endif
#define DEFAULT_SECTOR_SIZE 512
#define MAX_SECTOR_SIZE 2048
#define SECTOR_SIZE 512 /* still used in osf/sgi/sun code */
#define MAXIMUM_PARTS 60
#define ACTIVE_FLAG 0x80
#define EXTENDED 0x05
#define WIN98_EXTENDED 0x0f
#define LINUX_PARTITION 0x81
#define LINUX_SWAP 0x82
#define LINUX_NATIVE 0x83
#define LINUX_EXTENDED 0x85
#define LINUX_LVM 0x8e
#define LINUX_RAID 0xfd
#define IS_EXTENDED(i) \
((i) == EXTENDED || (i) == WIN98_EXTENDED || (i) == LINUX_EXTENDED)
#define SIZE(a) (sizeof(a)/sizeof((a)[0]))
#define cround(n) (display_in_cyl_units ? ((n)/units_per_sector)+1 : (n))
#define scround(x) (((x)+units_per_sector-1)/units_per_sector)
struct hd_geometry {
unsigned char heads;
unsigned char sectors;
unsigned short cylinders;
unsigned long start;
};
#define HDIO_GETGEO 0x0301 /* get device geometry */
struct systypes {
const char *name;
};
static unsigned sector_size = DEFAULT_SECTOR_SIZE;
static unsigned user_set_sector_size;
static unsigned sector_offset = 1;
/*
* Raw disk label. For DOS-type partition tables the MBR,
* with descriptions of the primary partitions.
*/
#if (MAX_SECTOR_SIZE) > (BUFSIZ+1)
static char MBRbuffer[MAX_SECTOR_SIZE];
#else
# define MBRbuffer bb_common_bufsiz1
#endif
#if ENABLE_FEATURE_OSF_LABEL
static int possibly_osf_label;
#endif
static unsigned heads, sectors, cylinders;
static void update_units(void);
/*
* return partition name - uses static storage unless buf is supplied
*/
static const char *
partname(const char *dev, int pno, int lth)
{
static char buffer[80];
const char *p;
int w, wp;
int bufsiz;
char *bufp;
bufp = buffer;
bufsiz = sizeof(buffer);
w = strlen(dev);
p = "";
if (isdigit(dev[w-1]))
p = "p";
/* devfs kludge - note: fdisk partition names are not supposed
to equal kernel names, so there is no reason to do this */
if (strcmp(dev + w - 4, "disc") == 0) {
w -= 4;
p = "part";
}
wp = strlen(p);
if (lth) {
snprintf(bufp, bufsiz, "%*.*s%s%-2u",
lth-wp-2, w, dev, p, pno);
} else {
snprintf(bufp, bufsiz, "%.*s%s%-2u", w, dev, p, pno);
}
return bufp;
}
struct partition {
unsigned char boot_ind; /* 0x80 - active */
unsigned char head; /* starting head */
unsigned char sector; /* starting sector */
unsigned char cyl; /* starting cylinder */
unsigned char sys_ind; /* What partition type */
unsigned char end_head; /* end head */
unsigned char end_sector; /* end sector */
unsigned char end_cyl; /* end cylinder */
unsigned char start4[4]; /* starting sector counting from 0 */
unsigned char size4[4]; /* nr of sectors in partition */
} ATTRIBUTE_PACKED;
enum failure {
ioctl_error, unable_to_open, unable_to_read, unable_to_seek,
unable_to_write
};
enum label_type {
label_dos, label_sun, label_sgi, label_aix, label_osf
};
#define LABEL_IS_DOS (label_dos == current_label_type)
#if ENABLE_FEATURE_SUN_LABEL
#define LABEL_IS_SUN (label_sun == current_label_type)
#define STATIC_SUN static
#else
#define LABEL_IS_SUN 0
#define STATIC_SUN extern
#endif
#if ENABLE_FEATURE_SGI_LABEL
#define LABEL_IS_SGI (label_sgi == current_label_type)
#define STATIC_SGI static
#else
#define LABEL_IS_SGI 0
#define STATIC_SGI extern
#endif
#if ENABLE_FEATURE_AIX_LABEL
#define LABEL_IS_AIX (label_aix == current_label_type)
#define STATIC_AIX static
#else
#define LABEL_IS_AIX 0
#define STATIC_AIX extern
#endif
#if ENABLE_FEATURE_OSF_LABEL
#define LABEL_IS_OSF (label_osf == current_label_type)
#define STATIC_OSF static
#else
#define LABEL_IS_OSF 0
#define STATIC_OSF extern
#endif
enum action { fdisk, require, try_only, create_empty_dos, create_empty_sun };
static enum label_type current_label_type;
static const char *disk_device;
static int fd; /* the disk */
static int partitions = 4; /* maximum partition + 1 */
static int display_in_cyl_units = 1;
static unsigned units_per_sector = 1;
#if ENABLE_FEATURE_FDISK_WRITABLE
static void change_units(void);
static void reread_partition_table(int leave);
static void delete_partition(int i);
static int get_partition(int warn, int max);
static void list_types(const struct systypes *sys);
static unsigned read_int(unsigned low, unsigned dflt, unsigned high, unsigned base, char *mesg);
#endif
static const char *partition_type(unsigned char type);
static void fdisk_fatal(enum failure why) ATTRIBUTE_NORETURN;
static void get_geometry(void);
static int get_boot(enum action what);
#define PLURAL 0
#define SINGULAR 1
#define hex_val(c) ({ \
char _c = (c); \
isdigit(_c) ? _c - '0' : \
tolower(_c) + 10 - 'a'; \
})
#define LINE_LENGTH 80
#define pt_offset(b, n) ((struct partition *)((b) + 0x1be + \
(n) * sizeof(struct partition)))
#define sector(s) ((s) & 0x3f)
#define cylinder(s, c) ((c) | (((s) & 0xc0) << 2))
#define hsc2sector(h,s,c) (sector(s) - 1 + sectors * \
((h) + heads * cylinder(s,c)))
#define set_hsc(h,s,c,sector) { \
s = sector % sectors + 1; \
sector /= sectors; \
h = sector % heads; \
sector /= heads; \
c = sector & 0xff; \
s |= (sector >> 2) & 0xc0; \
}
static unsigned get_start_sect(const struct partition *p);
static unsigned get_nr_sects(const struct partition *p);
/*
* 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.
*/
static struct pte {
struct partition *part_table; /* points into sectorbuffer */
struct partition *ext_pointer; /* points into sectorbuffer */
#if ENABLE_FEATURE_FDISK_WRITABLE
char changed; /* boolean */
#endif
off_t offset; /* disk sector number */
char *sectorbuffer; /* disk sector contents */
} ptes[MAXIMUM_PARTS];
#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 ATTRIBUTE_ALWAYS_INLINE void
set_changed(int i)
{
ptes[i].changed = 1;
}
#endif /* FEATURE_FDISK_WRITABLE */
static ATTRIBUTE_ALWAYS_INLINE struct partition *
get_part_table(int i)
{
return ptes[i].part_table;
}
static const char *
str_units(int n)
{ /* n==1: use singular */
if (n == 1)
return display_in_cyl_units ? _("cylinder") : _("sector");
else
return display_in_cyl_units ? _("cylinders") : _("sectors");
}
static int
valid_part_table_flag(const char *mbuffer)
{
return (mbuffer[510] == 0x55 && (uint8_t)mbuffer[511] == 0xaa);
}
#if ENABLE_FEATURE_FDISK_WRITABLE
static ATTRIBUTE_ALWAYS_INLINE void
write_part_table_flag(char *b)
{
b[510] = 0x55;
b[511] = 0xaa;
}
static char line_buffer[LINE_LENGTH];
static char *line_ptr;
/* read line; return 0 or first printable char */
static int
read_line(const char *prompt)
{
int sz;
sz = read_line_input(prompt, line_buffer, LINE_LENGTH, NULL);
if (sz <= 0)
exit(0); /* Ctrl-D or Ctrl-C */
if (line_buffer[sz-1] == '\n')
line_buffer[--sz] = '\0';
line_ptr = line_buffer;
while (*line_ptr && !isgraph(*line_ptr))
line_ptr++;
return *line_ptr;
}
static char
read_nonempty(const char *mesg)
{
while (!read_line(mesg)) /* repeat */;
return *line_ptr;
}
static char
read_maybe_empty(const char *mesg)
{
if (!read_line(mesg)) {
line_ptr = line_buffer;
line_ptr[0] = '\n';
line_ptr[1] = '\0';
}
return line_ptr[0];
}
static int
read_hex(const struct systypes *sys)
{
unsigned long v;
while (1) {
read_nonempty(_("Hex code (type L to list codes): "));
if (*line_ptr == 'l' || *line_ptr == 'L') {
list_types(sys);
continue;
}
v = bb_strtoul(line_ptr, NULL, 16);
if (v > 0xff)
/* Bad input also triggers this */
continue;
return v;
}
}
#endif /* FEATURE_FDISK_WRITABLE */
#include "fdisk_aix.c"
typedef struct {
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 */
} sun_partition;
#define sunlabel ((sun_partition *)MBRbuffer)
#define SUNOS_SWAP 3
#define SUN_WHOLE_DISK 5
STATIC_OSF void bsd_select(void);
STATIC_OSF void xbsd_print_disklabel(int);
#include "fdisk_osf.c"
#define SGI_VOLHDR 0x00
/* 1 and 2 were used for drive types no longer supported by SGI */
#define SGI_SWAP 0x03
/* 4 and 5 were for filesystem types SGI haven't ever supported on MIPS CPUs */
#define SGI_VOLUME 0x06
#define SGI_EFS 0x07
#define SGI_LVOL 0x08
#define SGI_RLVOL 0x09
#define SGI_XFS 0x0a
#define SGI_XFSLOG 0x0b
#define SGI_XLV 0x0c
#define SGI_XVM 0x0d
#define SGI_ENTIRE_DISK SGI_VOLUME
#if ENABLE_FEATURE_SGI_LABEL || ENABLE_FEATURE_SUN_LABEL
static uint16_t
fdisk_swap16(uint16_t x)
{
return (x << 8) | (x >> 8);
}
static uint32_t
fdisk_swap32(uint32_t x)
{
return (x << 24) |
((x & 0xFF00) << 8) |
((x & 0xFF0000) >> 8) |
(x >> 24);
}
#endif
STATIC_SGI const struct systypes sgi_sys_types[];
STATIC_SGI unsigned sgi_get_num_sectors(int i);
STATIC_SGI int sgi_get_sysid(int i);
STATIC_SGI void sgi_delete_partition(int i);
STATIC_SGI void sgi_change_sysid(int i, int sys);
STATIC_SGI void sgi_list_table(int xtra);
#if ENABLE_FEATURE_FDISK_ADVANCED
STATIC_SGI void sgi_set_xcyl(void);
#endif
STATIC_SGI int verify_sgi(int verbose);
STATIC_SGI void sgi_add_partition(int n, int sys);
STATIC_SGI void sgi_set_swappartition(int i);
STATIC_SGI const char *sgi_get_bootfile(void);
STATIC_SGI void sgi_set_bootfile(const char* aFile);
STATIC_SGI void create_sgiinfo(void);
STATIC_SGI void sgi_write_table(void);
STATIC_SGI void sgi_set_bootpartition(int i);
#include "fdisk_sgi.c"
STATIC_SUN const struct systypes sun_sys_types[];
STATIC_SUN void sun_delete_partition(int i);
STATIC_SUN void sun_change_sysid(int i, int sys);
STATIC_SUN void sun_list_table(int xtra);
STATIC_SUN void add_sun_partition(int n, int sys);
#if ENABLE_FEATURE_FDISK_ADVANCED
STATIC_SUN void sun_set_alt_cyl(void);
STATIC_SUN void sun_set_ncyl(int cyl);
STATIC_SUN void sun_set_xcyl(void);
STATIC_SUN void sun_set_ilfact(void);
STATIC_SUN void sun_set_rspeed(void);
STATIC_SUN void sun_set_pcylcount(void);
#endif
STATIC_SUN void toggle_sunflags(int i, unsigned char mask);
STATIC_SUN void verify_sun(void);
STATIC_SUN void sun_write_table(void);
#include "fdisk_sun.c"
/* DOS partition types */
static const struct systypes 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
{ 0 }
};
#if ENABLE_FEATURE_FDISK_WRITABLE
/* start_sect and nr_sects are stored little endian on all machines */
/* moreover, they are not aligned correctly */
static void
store4_little_endian(unsigned char *cp, unsigned val)
{
cp[0] = val;
cp[1] = val >> 8;
cp[2] = val >> 16;
cp[3] = val >> 24;
}
#endif /* FEATURE_FDISK_WRITABLE */
static unsigned
read4_little_endian(const unsigned char *cp)
{
return cp[0] + (cp[1] << 8) + (cp[2] << 16) + (cp[3] << 24);
}
#if ENABLE_FEATURE_FDISK_WRITABLE
static void
set_start_sect(struct partition *p, unsigned start_sect)
{
store4_little_endian(p->start4, start_sect);
}
#endif
static unsigned
get_start_sect(const struct partition *p)
{
return read4_little_endian(p->start4);
}
#if ENABLE_FEATURE_FDISK_WRITABLE
static void
set_nr_sects(struct partition *p, unsigned nr_sects)
{
store4_little_endian(p->size4, nr_sects);
}
#endif
static unsigned
get_nr_sects(const struct partition *p)
{
return read4_little_endian(p->size4);
}
/* normally O_RDWR, -l option gives O_RDONLY */
static int type_open = O_RDWR;
static int ext_index; /* the prime extended partition */
static int listing; /* no aborts for fdisk -l */
static int dos_compatible_flag = ~0;
#if ENABLE_FEATURE_FDISK_WRITABLE
static int dos_changed;
static int nowarn; /* no warnings for fdisk -l/-s */
#endif
static unsigned user_cylinders, user_heads, user_sectors;
static unsigned pt_heads, pt_sectors;
static unsigned kern_heads, kern_sectors;
static off_t extended_offset; /* offset of link pointers */
static unsigned long long total_number_of_sectors;
static jmp_buf listingbuf;
static void fdisk_fatal(enum failure why)
{
const char *message;
if (listing) {
close(fd);
longjmp(listingbuf, 1);
}
switch (why) {
case unable_to_open:
message = "\nUnable to open %s";
break;
case unable_to_read:
message = "\nUnable to read %s";
break;
case unable_to_seek:
message = "\nUnable to seek on %s";
break;
case unable_to_write:
message = "\nUnable to write %s";
break;
case ioctl_error:
message = "\nBLKGETSIZE ioctl failed on %s";
break;
default:
message = "\nFatal error";
}
bb_error_msg_and_die(message, disk_device);
}
static void
seek_sector(off_t secno)
{
off_t offset = secno * sector_size;
if (lseek(fd, offset, SEEK_SET) == (off_t) -1)
fdisk_fatal(unable_to_seek);
}
#if ENABLE_FEATURE_FDISK_WRITABLE
static void
write_sector(off_t secno, char *buf)
{
seek_sector(secno);
if (write(fd, buf, sector_size) != sector_size)
fdisk_fatal(unable_to_write);
}
#endif
/* Allocate a buffer and read a partition table sector */
static void
read_pte(struct pte *pe, off_t offset)
{
pe->offset = offset;
pe->sectorbuffer = xmalloc(sector_size);
seek_sector(offset);
if (read(fd, pe->sectorbuffer, sector_size) != sector_size)
fdisk_fatal(unable_to_read);
#if ENABLE_FEATURE_FDISK_WRITABLE
pe->changed = 0;
#endif
pe->part_table = pe->ext_pointer = NULL;
}
static unsigned
get_partition_start(const struct pte *pe)
{
return pe->offset + get_start_sect(pe->part_table);
}
#if ENABLE_FEATURE_FDISK_WRITABLE
/*
* Avoid warning about DOS partitions when no DOS partition was changed.
* Here a heuristic "is probably dos partition".
* We might also do the opposite and warn in all cases except
* for "is probably nondos partition".
*/
static int
is_dos_partition(int t)
{
return (t == 1 || t == 4 || t == 6 ||
t == 0x0b || t == 0x0c || t == 0x0e ||
t == 0x11 || t == 0x12 || t == 0x14 || t == 0x16 ||
t == 0x1b || t == 0x1c || t == 0x1e || t == 0x24 ||
t == 0xc1 || t == 0xc4 || t == 0xc6);
}
static void
menu(void)
{
puts(_("Command Action"));
if (LABEL_IS_SUN) {
puts(_("a\ttoggle a read only flag")); /* sun */
puts(_("b\tedit bsd disklabel"));
puts(_("c\ttoggle the mountable flag")); /* sun */
puts(_("d\tdelete a partition"));
puts(_("l\tlist known partition types"));
puts(_("n\tadd a new partition"));
puts(_("o\tcreate a new empty DOS partition table"));
puts(_("p\tprint the partition table"));
puts(_("q\tquit without saving changes"));
puts(_("s\tcreate a new empty Sun disklabel")); /* sun */
puts(_("t\tchange a partition's system id"));
puts(_("u\tchange display/entry units"));
puts(_("v\tverify the partition table"));
puts(_("w\twrite table to disk and exit"));
#if ENABLE_FEATURE_FDISK_ADVANCED
puts(_("x\textra functionality (experts only)"));
#endif
} else if (LABEL_IS_SGI) {
puts(_("a\tselect bootable partition")); /* sgi flavour */
puts(_("b\tedit bootfile entry")); /* sgi */
puts(_("c\tselect sgi swap partition")); /* sgi flavour */
puts(_("d\tdelete a partition"));
puts(_("l\tlist known partition types"));
puts(_("n\tadd a new partition"));
puts(_("o\tcreate a new empty DOS partition table"));
puts(_("p\tprint the partition table"));
puts(_("q\tquit without saving changes"));
puts(_("s\tcreate a new empty Sun disklabel")); /* sun */
puts(_("t\tchange a partition's system id"));
puts(_("u\tchange display/entry units"));
puts(_("v\tverify the partition table"));
puts(_("w\twrite table to disk and exit"));
} else if (LABEL_IS_AIX) {
puts(_("o\tcreate a new empty DOS partition table"));
puts(_("q\tquit without saving changes"));
puts(_("s\tcreate a new empty Sun disklabel")); /* sun */
} else {
puts(_("a\ttoggle a bootable flag"));
puts(_("b\tedit bsd disklabel"));
puts(_("c\ttoggle the dos compatibility flag"));
puts(_("d\tdelete a partition"));
puts(_("l\tlist known partition types"));
puts(_("n\tadd a new partition"));
puts(_("o\tcreate a new empty DOS partition table"));
puts(_("p\tprint the partition table"));
puts(_("q\tquit without saving changes"));
puts(_("s\tcreate a new empty Sun disklabel")); /* sun */
puts(_("t\tchange a partition's system id"));
puts(_("u\tchange display/entry units"));
puts(_("v\tverify the partition table"));
puts(_("w\twrite table to disk and exit"));
#if ENABLE_FEATURE_FDISK_ADVANCED
puts(_("x\textra functionality (experts only)"));
#endif
}
}
#endif /* FEATURE_FDISK_WRITABLE */
#if ENABLE_FEATURE_FDISK_ADVANCED
static void
xmenu(void)
{
puts(_("Command Action"));
if (LABEL_IS_SUN) {
puts(_("a\tchange number of alternate cylinders")); /*sun*/
puts(_("c\tchange number of cylinders"));
puts(_("d\tprint the raw data in the partition table"));
puts(_("e\tchange number of extra sectors per cylinder"));/*sun*/
puts(_("h\tchange number of heads"));
puts(_("i\tchange interleave factor")); /*sun*/
puts(_("o\tchange rotation speed (rpm)")); /*sun*/
puts(_("p\tprint the partition table"));
puts(_("q\tquit without saving changes"));
puts(_("r\treturn to main menu"));
puts(_("s\tchange number of sectors/track"));
puts(_("v\tverify the partition table"));
puts(_("w\twrite table to disk and exit"));
puts(_("y\tchange number of physical cylinders")); /*sun*/
} else if (LABEL_IS_SGI) {
puts(_("b\tmove beginning of data in a partition")); /* !sun */
puts(_("c\tchange number of cylinders"));
puts(_("d\tprint the raw data in the partition table"));
puts(_("e\tlist extended partitions")); /* !sun */
puts(_("g\tcreate an IRIX (SGI) partition table"));/* sgi */
puts(_("h\tchange number of heads"));
puts(_("p\tprint the partition table"));
puts(_("q\tquit without saving changes"));
puts(_("r\treturn to main menu"));
puts(_("s\tchange number of sectors/track"));
puts(_("v\tverify the partition table"));
puts(_("w\twrite table to disk and exit"));
} else if (LABEL_IS_AIX) {
puts(_("b\tmove beginning of data in a partition")); /* !sun */
puts(_("c\tchange number of cylinders"));
puts(_("d\tprint the raw data in the partition table"));
puts(_("e\tlist extended partitions")); /* !sun */
puts(_("g\tcreate an IRIX (SGI) partition table"));/* sgi */
puts(_("h\tchange number of heads"));
puts(_("p\tprint the partition table"));
puts(_("q\tquit without saving changes"));
puts(_("r\treturn to main menu"));
puts(_("s\tchange number of sectors/track"));
puts(_("v\tverify the partition table"));
puts(_("w\twrite table to disk and exit"));
} else {
puts(_("b\tmove beginning of data in a partition")); /* !sun */
puts(_("c\tchange number of cylinders"));
puts(_("d\tprint the raw data in the partition table"));
puts(_("e\tlist extended partitions")); /* !sun */
puts(_("f\tfix partition order")); /* !sun, !aix, !sgi */
#if ENABLE_FEATURE_SGI_LABEL
puts(_("g\tcreate an IRIX (SGI) partition table"));/* sgi */
#endif
puts(_("h\tchange number of heads"));
puts(_("p\tprint the partition table"));
puts(_("q\tquit without saving changes"));
puts(_("r\treturn to main menu"));
puts(_("s\tchange number of sectors/track"));
puts(_("v\tverify the partition table"));
puts(_("w\twrite table to disk and exit"));
}
}
#endif /* ADVANCED mode */
#if ENABLE_FEATURE_FDISK_WRITABLE
static const struct systypes *
get_sys_types(void)
{
return (
LABEL_IS_SUN ? sun_sys_types :
LABEL_IS_SGI ? sgi_sys_types :
i386_sys_types);
}
#else
#define get_sys_types() i386_sys_types
#endif /* FEATURE_FDISK_WRITABLE */
static const char *partition_type(unsigned char type)
{
int i;
const struct systypes *types = get_sys_types();
for (i = 0; types[i].name; i++)
if ((unsigned char)types[i].name[0] == type)
return types[i].name + 1;
return _("Unknown");
}
#if ENABLE_FEATURE_FDISK_WRITABLE
static int
get_sysid(int i)
{
return LABEL_IS_SUN ? sunlabel->infos[i].id :
(LABEL_IS_SGI ? sgi_get_sysid(i) :
ptes[i].part_table->sys_ind);
}
static void list_types(const struct systypes *sys)
{
enum { COLS = 3 };
unsigned last[COLS];
unsigned done, next, size;
int i;
for (size = 0; sys[size].name; size++) /* */;
done = 0;
for (i = COLS-1; i >= 0; i--) {
done += (size + i - done) / (i + 1);
last[COLS-1 - i] = done;
}
i = done = next = 0;
do {
printf("%c%2x %-22.22s", i ? ' ' : '\n',
(unsigned char)sys[next].name[0],
sys[next].name + 1);
next = last[i++] + done;
if (i >= COLS || next >= last[i]) {
i = 0;
next = ++done;
}
} while (done < last[0]);
putchar('\n');
}
#endif /* FEATURE_FDISK_WRITABLE */
static int
is_cleared_partition(const struct partition *p)
{
return !(!p || p->boot_ind || p->head || p->sector || p->cyl ||
p->sys_ind || p->end_head || p->end_sector || p->end_cyl ||
get_start_sect(p) || get_nr_sects(p));
}
static void
clear_partition(struct partition *p)
{
if (!p)
return;
memset(p, 0, sizeof(struct partition));
}
#if ENABLE_FEATURE_FDISK_WRITABLE
static void
set_partition(int i, int doext, off_t start, off_t stop, int sysid)
{
struct partition *p;
off_t offset;
if (doext) {
p = ptes[i].ext_pointer;
offset = extended_offset;
} else {
p = ptes[i].part_table;
offset = ptes[i].offset;
}
p->boot_ind = 0;
p->sys_ind = sysid;
set_start_sect(p, start - offset);
set_nr_sects(p, stop - start + 1);
if (dos_compatible_flag && (start/(sectors*heads) > 1023))
start = heads*sectors*1024 - 1;
set_hsc(p->head, p->sector, p->cyl, start);
if (dos_compatible_flag && (stop/(sectors*heads) > 1023))
stop = heads*sectors*1024 - 1;
set_hsc(p->end_head, p->end_sector, p->end_cyl, stop);
ptes[i].changed = 1;
}
#endif
static int
test_c(const char **m, const char *mesg)
{
int val = 0;
if (!*m)
printf(_("You must set"));
else {
printf(" %s", *m);
val = 1;
}
*m = mesg;
return val;
}
static int
warn_geometry(void)
{
const char *m = NULL;
int prev = 0;
if (!heads)
prev = test_c(&m, _("heads"));
if (!sectors)
prev = test_c(&m, _("sectors"));
if (!cylinders)
prev = test_c(&m, _("cylinders"));
if (!m)
return 0;
printf("%s%s.\n"
#if ENABLE_FEATURE_FDISK_WRITABLE
"You can do this from the extra functions menu.\n"
#endif
, prev ? _(" and ") : " ", m);
return 1;
}
static void update_units(void)
{
int cyl_units = heads * sectors;
if (display_in_cyl_units && cyl_units)
units_per_sector = cyl_units;
else
units_per_sector = 1; /* in sectors */
}
#if ENABLE_FEATURE_FDISK_WRITABLE
static void
warn_cylinders(void)
{
if (LABEL_IS_DOS && cylinders > 1024 && !nowarn)
printf(_("\n"
"The number of cylinders for this disk is set to %d.\n"
"There is nothing wrong with that, but this is larger than 1024,\n"
"and could in certain setups cause problems with:\n"
"1) software that runs at boot time (e.g., old versions of LILO)\n"
"2) booting and partitioning software from other OSs\n"
" (e.g., DOS FDISK, OS/2 FDISK)\n"),
cylinders);
}
#endif
static void
read_extended(int ext)
{
int i;
struct pte *pex;
struct partition *p, *q;
ext_index = ext;
pex = &ptes[ext];
pex->ext_pointer = pex->part_table;
p = pex->part_table;
if (!get_start_sect(p)) {
printf(_("Bad offset in primary extended partition\n"));
return;
}
while (IS_EXTENDED(p->sys_ind)) {
struct pte *pe = &ptes[partitions];
if (partitions >= MAXIMUM_PARTS) {
/* This is not a Linux restriction, but
this program uses arrays of size MAXIMUM_PARTS.
Do not try to 'improve' this test. */
struct pte *pre = &ptes[partitions-1];
#if ENABLE_FEATURE_FDISK_WRITABLE
printf(_("Warning: deleting partitions after %d\n"),
partitions);
pre->changed = 1;
#endif
clear_partition(pre->ext_pointer);
return;
}
read_pte(pe, extended_offset + get_start_sect(p));
if (!extended_offset)
extended_offset = get_start_sect(p);
q = p = pt_offset(pe->sectorbuffer, 0);
for (i = 0; i < 4; i++, p++) if (get_nr_sects(p)) {
if (IS_EXTENDED(p->sys_ind)) {
if (pe->ext_pointer)
printf(_("Warning: extra link "
"pointer in partition table"
" %d\n"), partitions + 1);
else
pe->ext_pointer = p;
} else if (p->sys_ind) {
if (pe->part_table)
printf(_("Warning: ignoring extra "
"data in partition table"
" %d\n"), partitions + 1);
else
pe->part_table = p;
}
}
/* very strange code here... */
if (!pe->part_table) {
if (q != pe->ext_pointer)
pe->part_table = q;
else
pe->part_table = q + 1;
}
if (!pe->ext_pointer) {
if (q != pe->part_table)
pe->ext_pointer = q;
else
pe->ext_pointer = q + 1;
}
p = pe->ext_pointer;
partitions++;
}
#if ENABLE_FEATURE_FDISK_WRITABLE
/* remove empty links */
remove:
for (i = 4; i < partitions; i++) {
struct pte *pe = &ptes[i];
if (!get_nr_sects(pe->part_table) &&
(partitions > 5 || ptes[4].part_table->sys_ind)) {
printf("omitting empty partition (%d)\n", i+1);
delete_partition(i);
goto remove; /* numbering changed */
}
}
#endif
}
#if ENABLE_FEATURE_FDISK_WRITABLE
static void
create_doslabel(void)
{
int i;
printf(
_("Building a new DOS disklabel. Changes will remain in memory only,\n"
"until you decide to write them. After that, of course, the previous\n"
"content won't be recoverable.\n\n"));
current_label_type = label_dos;
#if ENABLE_FEATURE_OSF_LABEL
possibly_osf_label = 0;
#endif
partitions = 4;
for (i = 510-64; i < 510; i++)
MBRbuffer[i] = 0;
write_part_table_flag(MBRbuffer);
extended_offset = 0;
set_all_unchanged();
set_changed(0);
get_boot(create_empty_dos);
}
#endif /* FEATURE_FDISK_WRITABLE */
static void
get_sectorsize(void)
{
if (!user_set_sector_size) {
int arg;
if (ioctl(fd, BLKSSZGET, &arg) == 0)
sector_size = arg;
if (sector_size != DEFAULT_SECTOR_SIZE)
printf(_("Note: sector size is %d (not %d)\n"),
sector_size, DEFAULT_SECTOR_SIZE);
}
}
static void
get_kernel_geometry(void)
{
struct hd_geometry geometry;
if (!ioctl(fd, HDIO_GETGEO, &geometry)) {
kern_heads = geometry.heads;
kern_sectors = geometry.sectors;
/* never use geometry.cylinders - it is truncated */
}
}
static void
get_partition_table_geometry(void)
{
const unsigned char *bufp = (const unsigned char *)MBRbuffer;
struct partition *p;
int i, h, s, hh, ss;
int first = 1;
int bad = 0;
if (!(valid_part_table_flag((char*)bufp)))
return;
hh = ss = 0;
for (i = 0; i < 4; i++) {
p = pt_offset(bufp, i);
if (p->sys_ind != 0) {
h = p->end_head + 1;
s = (p->end_sector & 077);
if (first) {
hh = h;
ss = s;
first = 0;
} else if (hh != h || ss != s)
bad = 1;
}
}
if (!first && !bad) {
pt_heads = hh;
pt_sectors = ss;
}
}
static void
get_geometry(void)
{
int sec_fac;
unsigned long long bytes; /* really u64 */
get_sectorsize();
sec_fac = sector_size / 512;
#if ENABLE_FEATURE_SUN_LABEL
guess_device_type();
#endif
heads = cylinders = sectors = 0;
kern_heads = kern_sectors = 0;
pt_heads = pt_sectors = 0;
get_kernel_geometry();
get_partition_table_geometry();
heads = user_heads ? user_heads :
pt_heads ? pt_heads :
kern_heads ? kern_heads : 255;
sectors = user_sectors ? user_sectors :
pt_sectors ? pt_sectors :
kern_sectors ? kern_sectors : 63;
if (ioctl(fd, BLKGETSIZE64, &bytes) == 0) {
/* got bytes */
} else {
unsigned long longsectors;
if (ioctl(fd, BLKGETSIZE, &longsectors))
longsectors = 0;
bytes = ((unsigned long long) longsectors) << 9;
}
total_number_of_sectors = (bytes >> 9);
sector_offset = 1;
if (dos_compatible_flag)
sector_offset = sectors;
cylinders = total_number_of_sectors / (heads * sectors * sec_fac);
if (!cylinders)
cylinders = user_cylinders;
}
/*
* Read MBR. Returns:
* -1: no 0xaa55 flag present (possibly entire disk BSD)
* 0: found or created label
* 1: I/O error
*/
static int
get_boot(enum action what)
{
int i;
partitions = 4;
for (i = 0; i < 4; i++) {
struct pte *pe = &ptes[i];
pe->part_table = pt_offset(MBRbuffer, i);
pe->ext_pointer = NULL;
pe->offset = 0;
pe->sectorbuffer = MBRbuffer;
#if ENABLE_FEATURE_FDISK_WRITABLE
pe->changed = (what == create_empty_dos);
#endif
}
#if ENABLE_FEATURE_SUN_LABEL
if (what == create_empty_sun && check_sun_label())
return 0;
#endif
memset(MBRbuffer, 0, 512);
#if ENABLE_FEATURE_FDISK_WRITABLE
if (what == create_empty_dos)
goto got_dos_table; /* skip reading disk */
if ((fd = open(disk_device, type_open)) < 0) {
if ((fd = open(disk_device, O_RDONLY)) < 0) {
if (what == try_only)
return 1;
fdisk_fatal(unable_to_open);
} else
printf(_("You will not be able to write "
"the partition table.\n"));
}
if (512 != read(fd, MBRbuffer, 512)) {
if (what == try_only)
return 1;
fdisk_fatal(unable_to_read);
}
#else
if ((fd = open(disk_device, O_RDONLY)) < 0)
return 1;
if (512 != read(fd, MBRbuffer, 512))
return 1;
#endif
get_geometry();
update_units();
#if ENABLE_FEATURE_SUN_LABEL
if (check_sun_label())
return 0;
#endif
#if ENABLE_FEATURE_SGI_LABEL
if (check_sgi_label())
return 0;
#endif
#if ENABLE_FEATURE_AIX_LABEL
if (check_aix_label())
return 0;
#endif
#if ENABLE_FEATURE_OSF_LABEL
if (check_osf_label()) {
possibly_osf_label = 1;
if (!valid_part_table_flag(MBRbuffer)) {
current_label_type = label_osf;
return 0;
}
printf(_("This disk has both DOS and BSD magic.\n"
"Give the 'b' command to go to BSD mode.\n"));
}
#endif
#if ENABLE_FEATURE_FDISK_WRITABLE
got_dos_table:
#endif
if (!valid_part_table_flag(MBRbuffer)) {
#if !ENABLE_FEATURE_FDISK_WRITABLE
return -1;
#else
switch (what) {
case fdisk:
printf(_("Device contains neither a valid DOS "
"partition table, nor Sun, SGI or OSF "
"disklabel\n"));
#ifdef __sparc__
#if ENABLE_FEATURE_SUN_LABEL
create_sunlabel();
#endif
#else
create_doslabel();
#endif
return 0;
case try_only:
return -1;
case create_empty_dos:
#if ENABLE_FEATURE_SUN_LABEL
case create_empty_sun:
#endif
break;
default:
bb_error_msg_and_die(_("internal error"));
}
#endif /* FEATURE_FDISK_WRITABLE */
}
#if ENABLE_FEATURE_FDISK_WRITABLE
warn_cylinders();
#endif
warn_geometry();
for (i = 0; i < 4; i++) {
struct pte *pe = &ptes[i];
if (IS_EXTENDED(pe->part_table->sys_ind)) {
if (partitions != 4)
printf(_("Ignoring extra extended "
"partition %d\n"), i + 1);
else
read_extended(i);
}
}
for (i = 3; i < partitions; i++) {
struct pte *pe = &ptes[i];
if (!valid_part_table_flag(pe->sectorbuffer)) {
printf(_("Warning: invalid flag 0x%02x,0x%02x of partition "
"table %d will be corrected by w(rite)\n"),
pe->sectorbuffer[510],
pe->sectorbuffer[511],
i + 1);
#if ENABLE_FEATURE_FDISK_WRITABLE
pe->changed = 1;
#endif
}
}
return 0;
}
#if ENABLE_FEATURE_FDISK_WRITABLE
/*
* Print the message MESG, then read an integer between LOW and HIGH (inclusive).
* If the user hits Enter, DFLT is returned.
* Answers like +10 are interpreted as offsets from BASE.
*
* There is no default if DFLT is not between LOW and HIGH.
*/
static unsigned
read_int(unsigned low, unsigned dflt, unsigned high, unsigned base, char *mesg)
{
unsigned i;
int default_ok = 1;
const char *fmt = "%s (%u-%u, default %u): ";
if (dflt < low || dflt > high) {
fmt = "%s (%u-%u): ";
default_ok = 0;
}
while (1) {
int use_default = default_ok;
/* ask question and read answer */
do {
printf(fmt, mesg, low, high, dflt);
read_maybe_empty("");
} while (*line_ptr != '\n' && !isdigit(*line_ptr)
&& *line_ptr != '-' && *line_ptr != '+');
if (*line_ptr == '+' || *line_ptr == '-') {
int minus = (*line_ptr == '-');
int absolute = 0;
i = atoi(line_ptr + 1);
while (isdigit(*++line_ptr))
use_default = 0;
switch (*line_ptr) {
case 'c':
case 'C':
if (!display_in_cyl_units)
i *= heads * sectors;
break;
case 'K':
absolute = 1024;
break;
case 'k':
absolute = 1000;
break;
case 'm':
case 'M':
absolute = 1000000;
break;
case 'g':
case 'G':
absolute = 1000000000;
break;
default:
break;
}
if (absolute) {
unsigned long long bytes;
unsigned long unit;
bytes = (unsigned long long) i * absolute;
unit = sector_size * units_per_sector;
bytes += unit/2; /* round */
bytes /= unit;
i = bytes;
}
if (minus)
i = -i;
i += base;
} else {
i = atoi(line_ptr);
while (isdigit(*line_ptr)) {
line_ptr++;
use_default = 0;
}
}
if (use_default)
printf(_("Using default value %u\n"), i = dflt);
if (i >= low && i <= high)
break;
else
printf(_("Value is out of range\n"));
}
return i;
}
static int
get_partition(int warn, int max)
{
struct pte *pe;
int i;
i = read_int(1, 0, max, 0, _("Partition number")) - 1;
pe = &ptes[i];
if (warn) {
if ((!LABEL_IS_SUN && !LABEL_IS_SGI && !pe->part_table->sys_ind)
|| (LABEL_IS_SUN && (!sunlabel->partitions[i].num_sectors || !sunlabel->infos[i].id))
|| (LABEL_IS_SGI && !sgi_get_num_sectors(i))
) {
printf(_("Warning: partition %d has empty type\n"), i+1);
}
}
return i;
}
static int
get_existing_partition(int warn, int max)
{
int pno = -1;
int i;
for (i = 0; i < max; i++) {
struct pte *pe = &ptes[i];
struct partition *p = pe->part_table;
if (p && !is_cleared_partition(p)) {
if (pno >= 0)
goto not_unique;
pno = i;
}
}
if (pno >= 0) {
printf(_("Selected partition %d\n"), pno+1);
return pno;
}
printf(_("No partition is defined yet!\n"));
return -1;
not_unique:
return get_partition(warn, max);
}
static int
get_nonexisting_partition(int warn, int max)
{
int pno = -1;
int i;
for (i = 0; i < max; i++) {
struct pte *pe = &ptes[i];
struct partition *p = pe->part_table;
if (p && is_cleared_partition(p)) {
if (pno >= 0)
goto not_unique;
pno = i;
}
}
if (pno >= 0) {
printf(_("Selected partition %d\n"), pno+1);
return pno;
}
printf(_("All primary partitions have been defined already!\n"));
return -1;
not_unique:
return get_partition(warn, max);
}
static void
change_units(void)
{
display_in_cyl_units = !display_in_cyl_units;
update_units();
printf(_("Changing display/entry units to %s\n"),
str_units(PLURAL));
}
static void
toggle_active(int i)
{
struct pte *pe = &ptes[i];
struct partition *p = pe->part_table;
if (IS_EXTENDED(p->sys_ind) && !p->boot_ind)
printf(_("WARNING: Partition %d is an extended partition\n"), i + 1);
p->boot_ind = (p->boot_ind ? 0 : ACTIVE_FLAG);
pe->changed = 1;
}
static void
toggle_dos_compatibility_flag(void)
{
dos_compatible_flag = ~dos_compatible_flag;
if (dos_compatible_flag) {
sector_offset = sectors;
printf(_("DOS Compatibility flag is set\n"));
}
else {
sector_offset = 1;
printf(_("DOS Compatibility flag is not set\n"));
}
}
static void
delete_partition(int i)
{
struct pte *pe = &ptes[i];
struct partition *p = pe->part_table;
struct partition *q = pe->ext_pointer;
/* Note that for the fifth partition (i == 4) we don't actually
* decrement partitions.
*/
if (warn_geometry())
return; /* C/H/S not set */
pe->changed = 1;
if (LABEL_IS_SUN) {
sun_delete_partition(i);
return;
}
if (LABEL_IS_SGI) {
sgi_delete_partition(i);
return;
}
if (i < 4) {
if (IS_EXTENDED(p->sys_ind) && i == ext_index) {
partitions = 4;
ptes[ext_index].ext_pointer = NULL;
extended_offset = 0;
}
clear_partition(p);
return;
}
if (!q->sys_ind && i > 4) {
/* the last one in the chain - just delete */
--partitions;
--i;
clear_partition(ptes[i].ext_pointer);
ptes[i].changed = 1;
} else {
/* not the last one - further ones will be moved down */
if (i > 4) {
/* delete this link in the chain */
p = ptes[i-1].ext_pointer;
*p = *q;
set_start_sect(p, get_start_sect(q));
set_nr_sects(p, get_nr_sects(q));
ptes[i-1].changed = 1;
} else if (partitions > 5) { /* 5 will be moved to 4 */
/* the first logical in a longer chain */
pe = &ptes[5];
if (pe->part_table) /* prevent SEGFAULT */
set_start_sect(pe->part_table,
get_partition_start(pe) -
extended_offset);
pe->offset = extended_offset;
pe->changed = 1;
}
if (partitions > 5) {
partitions--;
while (i < partitions) {
ptes[i] = ptes[i+1];
i++;
}
} else
/* the only logical: clear only */
clear_partition(ptes[i].part_table);
}
}
static void
change_sysid(void)
{
int i, sys, origsys;
struct partition *p;
/* If sgi_label then don't use get_existing_partition,
let the user select a partition, since get_existing_partition()
only works for Linux like partition tables. */
if (!LABEL_IS_SGI) {
i = get_existing_partition(0, partitions);
} else {
i = get_partition(0, partitions);
}
if (i == -1)
return;
p = ptes[i].part_table;
origsys = sys = get_sysid(i);
/* if changing types T to 0 is allowed, then
the reverse change must be allowed, too */
if (!sys && !LABEL_IS_SGI && !LABEL_IS_SUN && !get_nr_sects(p)) {
printf(_("Partition %d does not exist yet!\n"), i + 1);
return;
}
while (1) {
sys = read_hex (get_sys_types());
if (!sys && !LABEL_IS_SGI && !LABEL_IS_SUN) {
printf(_("Type 0 means free space to many systems\n"
"(but not to Linux). Having partitions of\n"
"type 0 is probably unwise. You can delete\n"
"a partition using the 'd' command.\n"));
/* break; */
}
if (!LABEL_IS_SUN && !LABEL_IS_SGI) {
if (IS_EXTENDED(sys) != IS_EXTENDED(p->sys_ind)) {
printf(_("You cannot change a partition into"
" an extended one or vice versa\n"
"Delete it first.\n"));
break;
}
}
if (sys < 256) {
if (LABEL_IS_SUN && i == 2 && sys != SUN_WHOLE_DISK)
printf(_("Consider leaving partition 3 "
"as Whole disk (5),\n"
"as SunOS/Solaris expects it and "
"even Linux likes it.\n\n"));
if (LABEL_IS_SGI &&
(
(i == 10 && sys != SGI_ENTIRE_DISK) ||
(i == 8 && sys != 0)
)
){
printf(_("Consider leaving partition 9 "
"as volume header (0),\nand "
"partition 11 as entire volume (6)"
"as IRIX expects it.\n\n"));
}
if (sys == origsys)
break;
if (LABEL_IS_SUN) {
sun_change_sysid(i, sys);
} else if (LABEL_IS_SGI) {
sgi_change_sysid(i, sys);
} else
p->sys_ind = sys;
printf(_("Changed system type of partition %d "
"to %x (%s)\n"), i + 1, sys,
partition_type(sys));
ptes[i].changed = 1;
if (is_dos_partition(origsys) ||
is_dos_partition(sys))
dos_changed = 1;
break;
}
}
}
#endif /* FEATURE_FDISK_WRITABLE */
/* check_consistency() and linear2chs() added Sat Mar 6 12:28:16 1993,
* faith@cs.unc.edu, based on code fragments from pfdisk by Gordon W. Ross,
* Jan. 1990 (version 1.2.1 by Gordon W. Ross Aug. 1990; Modified by S.
* Lubkin Oct. 1991). */
static void
linear2chs(unsigned ls, unsigned *c, unsigned *h, unsigned *s)
{
int spc = heads * sectors;
*c = ls / spc;
ls = ls % spc;
*h = ls / sectors;
*s = ls % sectors + 1; /* sectors count from 1 */
}
static void
check_consistency(const struct partition *p, int partition)
{
unsigned pbc, pbh, pbs; /* physical beginning c, h, s */
unsigned pec, peh, pes; /* physical ending c, h, s */
unsigned lbc, lbh, lbs; /* logical beginning c, h, s */
unsigned lec, leh, les; /* logical ending c, h, s */
if (!heads || !sectors || (partition >= 4))
return; /* do not check extended partitions */
/* physical beginning c, h, s */
pbc = (p->cyl & 0xff) | ((p->sector << 2) & 0x300);
pbh = p->head;
pbs = p->sector & 0x3f;
/* physical ending c, h, s */
pec = (p->end_cyl & 0xff) | ((p->end_sector << 2) & 0x300);
peh = p->end_head;
pes = p->end_sector & 0x3f;
/* compute logical beginning (c, h, s) */
linear2chs(get_start_sect(p), &lbc, &lbh, &lbs);
/* compute logical ending (c, h, s) */
linear2chs(get_start_sect(p) + get_nr_sects(p) - 1, &lec, &leh, &les);
/* Same physical / logical beginning? */
if (cylinders <= 1024 && (pbc != lbc || pbh != lbh || pbs != lbs)) {
printf(_("Partition %d has different physical/logical "
"beginnings (non-Linux?):\n"), partition + 1);
printf(_(" phys=(%d, %d, %d) "), pbc, pbh, pbs);
printf(_("logical=(%d, %d, %d)\n"),lbc, lbh, lbs);
}
/* Same physical / logical ending? */
if (cylinders <= 1024 && (pec != lec || peh != leh || pes != les)) {
printf(_("Partition %d has different physical/logical "
"endings:\n"), partition + 1);
printf(_(" phys=(%d, %d, %d) "), pec, peh, pes);
printf(_("logical=(%d, %d, %d)\n"),lec, leh, les);
}
/* Ending on cylinder boundary? */
if (peh != (heads - 1) || pes != sectors) {
printf(_("Partition %i does not end on cylinder boundary.\n"),
partition + 1);
}
}
static void
list_disk_geometry(void)
{
long long bytes = (total_number_of_sectors << 9);
long megabytes = bytes/1000000;
if (megabytes < 10000)
printf(_("\nDisk %s: %ld MB, %lld bytes\n"),
disk_device, megabytes, bytes);
else
printf(_("\nDisk %s: %ld.%ld GB, %lld bytes\n"),
disk_device, megabytes/1000, (megabytes/100)%10, bytes);
printf(_("%d heads, %d sectors/track, %d cylinders"),
heads, sectors, cylinders);
if (units_per_sector == 1)
printf(_(", total %llu sectors"),
total_number_of_sectors / (sector_size/512));
printf(_("\nUnits = %s of %d * %d = %d bytes\n\n"),
str_units(PLURAL),
units_per_sector, sector_size, units_per_sector * sector_size);
}
/*
* Check whether partition entries are ordered by their starting positions.
* Return 0 if OK. Return i if partition i should have been earlier.
* Two separate checks: primary and logical partitions.
*/
static int
wrong_p_order(int *prev)
{
const struct pte *pe;
const struct partition *p;
off_t last_p_start_pos = 0, p_start_pos;
int i, last_i = 0;
for (i = 0 ; i < partitions; i++) {
if (i == 4) {
last_i = 4;
last_p_start_pos = 0;
}
pe = &ptes[i];
if ((p = pe->part_table)->sys_ind) {
p_start_pos = get_partition_start(pe);
if (last_p_start_pos > p_start_pos) {
if (prev)
*prev = last_i;
return i;
}
last_p_start_pos = p_start_pos;
last_i = i;
}
}
return 0;
}
#if ENABLE_FEATURE_FDISK_ADVANCED
/*
* Fix the chain of logicals.
* extended_offset is unchanged, the set of sectors used is unchanged
* The chain is sorted so that sectors increase, and so that
* starting sectors increase.
*
* After this it may still be that cfdisk doesnt like the table.
* (This is because cfdisk considers expanded parts, from link to
* end of partition, and these may still overlap.)
* Now
* sfdisk /dev/hda > ohda; sfdisk /dev/hda < ohda
* may help.
*/
static void
fix_chain_of_logicals(void)
{
int j, oj, ojj, sj, sjj;
struct partition *pj,*pjj,tmp;
/* Stage 1: sort sectors but leave sector of part 4 */
/* (Its sector is the global extended_offset.) */
stage1:
for (j = 5; j < partitions-1; j++) {
oj = ptes[j].offset;
ojj = ptes[j+1].offset;
if (oj > ojj) {
ptes[j].offset = ojj;
ptes[j+1].offset = oj;
pj = ptes[j].part_table;
set_start_sect(pj, get_start_sect(pj)+oj-ojj);
pjj = ptes[j+1].part_table;
set_start_sect(pjj, get_start_sect(pjj)+ojj-oj);
set_start_sect(ptes[j-1].ext_pointer,
ojj-extended_offset);
set_start_sect(ptes[j].ext_pointer,
oj-extended_offset);
goto stage1;
}
}
/* Stage 2: sort starting sectors */
stage2:
for (j = 4; j < partitions-1; j++) {
pj = ptes[j].part_table;
pjj = ptes[j+1].part_table;
sj = get_start_sect(pj);
sjj = get_start_sect(pjj);
oj = ptes[j].offset;
ojj = ptes[j+1].offset;
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 < partitions; j++)
ptes[j].changed = 1;
}
static void
fix_partition_table_order(void)
{
struct pte *pei, *pek;
int i,k;
if (!wrong_p_order(NULL)) {
printf(_("Nothing to do. Ordering is correct already.\n\n"));
return;
}
while ((i = wrong_p_order(&k)) != 0 && i < 4) {
/* partition i should have come earlier, move it */
/* We have to move data in the MBR */
struct partition *pi, *pk, *pe, pbuf;
pei = &ptes[i];
pek = &ptes[k];
pe = pei->ext_pointer;
pei->ext_pointer = pek->ext_pointer;
pek->ext_pointer = pe;
pi = pei->part_table;
pk = pek->part_table;
memmove(&pbuf, pi, sizeof(struct partition));
memmove(pi, pk, sizeof(struct partition));
memmove(pk, &pbuf, sizeof(struct partition));
pei->changed = pek->changed = 1;
}
if (i)
fix_chain_of_logicals();
printf("Done.\n");
}
#endif
static void
list_table(int xtra)
{
const struct partition *p;
int i, w;
if (LABEL_IS_SUN) {
sun_list_table(xtra);
return;
}
if (LABEL_IS_SUN) {
sgi_list_table(xtra);
return;
}
list_disk_geometry();
if (LABEL_IS_OSF) {
xbsd_print_disklabel(xtra);
return;
}
/* Heuristic: we list partition 3 of /dev/foo as /dev/foo3,
but if the device name ends in a digit, say /dev/foo1,
then the partition is called /dev/foo1p3. */
w = strlen(disk_device);
if (w && isdigit(disk_device[w-1]))
w++;
if (w < 5)
w = 5;
// 1 12345678901 12345678901 12345678901 12
printf(_("%*s Boot Start End Blocks Id System\n"),
w+1, _("Device"));
for (i = 0; i < partitions; i++) {
const struct pte *pe = &ptes[i];
off_t psects;
off_t pblocks;
unsigned podd;
p = pe->part_table;
if (!p || is_cleared_partition(p))
continue;
psects = get_nr_sects(p);
pblocks = psects;
podd = 0;
if (sector_size < 1024) {
pblocks /= (1024 / sector_size);
podd = psects % (1024 / sector_size);
}
if (sector_size > 1024)
pblocks *= (sector_size / 1024);
printf("%s %c %11llu %11llu %11llu%c %2x %s\n",
partname(disk_device, i+1, w+2),
!p->boot_ind ? ' ' : p->boot_ind == ACTIVE_FLAG /* boot flag */
? '*' : '?',
(unsigned long long) cround(get_partition_start(pe)), /* start */
(unsigned long long) cround(get_partition_start(pe) + psects /* end */
- (psects ? 1 : 0)),
(unsigned long long) pblocks, podd ? '+' : ' ', /* odd flag on end */
p->sys_ind, /* type id */
partition_type(p->sys_ind)); /* type name */
check_consistency(p, i);
}
/* Is partition table in disk order? It need not be, but... */
/* partition table entries are not checked for correct order if this
is a sgi, sun or aix labeled disk... */
if (LABEL_IS_DOS && wrong_p_order(NULL)) {
/* FIXME */
printf(_("\nPartition table entries are not in disk order\n"));
}
}
#if ENABLE_FEATURE_FDISK_ADVANCED
static void
x_list_table(int extend)
{
const struct pte *pe;
const struct partition *p;
int i;
printf(_("\nDisk %s: %d heads, %d sectors, %d cylinders\n\n"),
disk_device, heads, sectors, cylinders);
printf(_("Nr AF Hd Sec Cyl Hd Sec Cyl Start Size ID\n"));
for (i = 0 ; i < partitions; i++) {
pe = &ptes[i];
p = (extend ? pe->ext_pointer : pe->part_table);
if (p != NULL) {
printf("%2d %02x%4d%4d%5d%4d%4d%5d%11u%11u %02x\n",
i + 1, p->boot_ind, p->head,
sector(p->sector),
cylinder(p->sector, p->cyl), p->end_head,
sector(p->end_sector),
cylinder(p->end_sector, p->end_cyl),
get_start_sect(p), get_nr_sects(p), p->sys_ind);
if (p->sys_ind)
check_consistency(p, i);
}
}
}
#endif
#if ENABLE_FEATURE_FDISK_WRITABLE
static void
fill_bounds(off_t *first, off_t *last)
{
int i;
const struct pte *pe = &ptes[0];
const struct partition *p;
for (i = 0; i < partitions; pe++,i++) {
p = pe->part_table;
if (!p->sys_ind || IS_EXTENDED(p->sys_ind)) {
first[i] = 0xffffffff;
last[i] = 0;
} else {
first[i] = get_partition_start(pe);
last[i] = first[i] + get_nr_sects(p) - 1;
}
}
}
static void
check(int n, unsigned h, unsigned s, unsigned c, off_t start)
{
off_t total, real_s, real_c;
real_s = sector(s) - 1;
real_c = cylinder(s, c);
total = (real_c * sectors + real_s) * heads + h;
if (!total)
printf(_("Warning: partition %d contains sector 0\n"), n);
if (h >= heads)
printf(_("Partition %d: head %d greater than maximum %d\n"),
n, h + 1, heads);
if (real_s >= sectors)
printf(_("Partition %d: sector %d greater than "
"maximum %d\n"), n, s, sectors);
if (real_c >= cylinders)
printf(_("Partitions %d: cylinder %llu greater than "
"maximum %d\n"), n, (unsigned long long)real_c + 1, cylinders);
if (cylinders <= 1024 && start != total)
printf(_("Partition %d: previous sectors %llu disagrees with "
"total %llu\n"), n, (unsigned long long)start, (unsigned long long)total);
}
static void
verify(void)
{
int i, j;
unsigned total = 1;
off_t first[partitions], last[partitions];
struct partition *p;
if (warn_geometry())
return;
if (LABEL_IS_SUN) {
verify_sun();
return;
}
if (LABEL_IS_SGI) {
verify_sgi(1);
return;
}
fill_bounds(first, last);
for (i = 0; i < partitions; i++) {
struct pte *pe = &ptes[i];
p = pe->part_table;
if (p->sys_ind && !IS_EXTENDED(p->sys_ind)) {
check_consistency(p, i);
if (get_partition_start(pe) < first[i])
printf(_("Warning: bad start-of-data in "
"partition %d\n"), i + 1);
check(i + 1, p->end_head, p->end_sector, p->end_cyl,
last[i]);
total += last[i] + 1 - first[i];
for (j = 0; j < i; j++)
if ((first[i] >= first[j] && first[i] <= last[j])
|| ((last[i] <= last[j] && last[i] >= first[j]))) {
printf(_("Warning: partition %d overlaps "
"partition %d.\n"), j + 1, i + 1);
total += first[i] >= first[j] ?
first[i] : first[j];
total -= last[i] <= last[j] ?
last[i] : last[j];
}
}
}
if (extended_offset) {
struct pte *pex = &ptes[ext_index];
off_t e_last = get_start_sect(pex->part_table) +
get_nr_sects(pex->part_table) - 1;
for (i = 4; i < partitions; i++) {
total++;
p = ptes[i].part_table;
if (!p->sys_ind) {
if (i != 4 || i + 1 < partitions)
printf(_("Warning: partition %d "
"is empty\n"), i + 1);
}
else if (first[i] < extended_offset ||
last[i] > e_last)
printf(_("Logical partition %d not entirely in "
"partition %d\n"), i + 1, ext_index + 1);
}
}
if (total > heads * sectors * cylinders)
printf(_("Total allocated sectors %d greater than the maximum "
"%d\n"), total, heads * sectors * cylinders);
else if ((total = heads * sectors * cylinders - total) != 0)
printf(_("%d unallocated sectors\n"), total);
}
static void
add_partition(int n, int sys)
{
char mesg[256]; /* 48 does not suffice in Japanese */
int i, num_read = 0;
struct partition *p = ptes[n].part_table;
struct partition *q = ptes[ext_index].part_table;
long long llimit;
off_t start, stop = 0, limit, temp,
first[partitions], last[partitions];
if (p && p->sys_ind) {
printf(_("Partition %d is already defined. Delete "
"it before re-adding it.\n"), n + 1);
return;
}
fill_bounds(first, last);
if (n < 4) {
start = sector_offset;
if (display_in_cyl_units || !total_number_of_sectors)
llimit = heads * sectors * cylinders - 1;
else
llimit = total_number_of_sectors - 1;
limit = llimit;
if (limit != llimit)
limit = 0x7fffffff;
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 < partitions; i++)
first[i] = (cround(first[i]) - 1) * units_per_sector;
snprintf(mesg, sizeof(mesg), _("First %s"), str_units(SINGULAR));
do {
temp = start;
for (i = 0; i < partitions; i++) {
int lastplusoff;
if (start == ptes[i].offset)
start += sector_offset;
lastplusoff = last[i] + ((n < 4) ? 0 : sector_offset);
if (start >= first[i] && start <= lastplusoff)
start = lastplusoff + 1;
}
if (start > limit)
break;
if (start >= temp+units_per_sector && num_read) {
printf(_("Sector %"OFF_FMT"d is already allocated\n"), temp);
temp = start;
num_read = 0;
}
if (!num_read && start == temp) {
off_t saved_start;
saved_start = start;
start = read_int(cround(saved_start), cround(saved_start), cround(limit),
0, mesg);
if (display_in_cyl_units) {
start = (start - 1) * units_per_sector;
if (start < saved_start) start = saved_start;
}
num_read = 1;
}
} while (start != temp || !num_read);
if (n > 4) { /* NOT for fifth partition */
struct pte *pe = &ptes[n];
pe->offset = start - sector_offset;
if (pe->offset == extended_offset) { /* must be corrected */
pe->offset++;
if (sector_offset == 1)
start++;
}
}
for (i = 0; i < partitions; i++) {
struct pte *pe = &ptes[i];
if (start < pe->offset && limit >= pe->offset)
limit = pe->offset - 1;
if (start < first[i] && limit >= first[i])
limit = first[i] - 1;
}
if (start > limit) {
printf(_("No free sectors available\n"));
if (n > 4)
partitions--;
return;
}
if (cround(start) == cround(limit)) {
stop = limit;
} else {
snprintf(mesg, sizeof(mesg),
_("Last %s or +size or +sizeM or +sizeK"),
str_units(SINGULAR));
stop = read_int(cround(start), cround(limit), cround(limit),
cround(start), mesg);
if (display_in_cyl_units) {
stop = stop * units_per_sector - 1;
if (stop >limit)
stop = limit;
}
}
set_partition(n, 0, start, stop, sys);
if (n > 4)
set_partition(n - 1, 1, ptes[n].offset, stop, EXTENDED);
if (IS_EXTENDED(sys)) {
struct pte *pe4 = &ptes[4];
struct pte *pen = &ptes[n];
ext_index = n;
pen->ext_pointer = p;
pe4->offset = extended_offset = start;
pe4->sectorbuffer = xzalloc(sector_size);
pe4->part_table = pt_offset(pe4->sectorbuffer, 0);
pe4->ext_pointer = pe4->part_table + 1;
pe4->changed = 1;
partitions = 5;
}
}
static void
add_logical(void)
{
if (partitions > 5 || ptes[4].part_table->sys_ind) {
struct pte *pe = &ptes[partitions];
pe->sectorbuffer = xzalloc(sector_size);
pe->part_table = pt_offset(pe->sectorbuffer, 0);
pe->ext_pointer = pe->part_table + 1;
pe->offset = 0;
pe->changed = 1;
partitions++;
}
add_partition(partitions - 1, LINUX_NATIVE);
}
static void
new_partition(void)
{
int i, free_primary = 0;
if (warn_geometry())
return;
if (LABEL_IS_SUN) {
add_sun_partition(get_partition(0, partitions), LINUX_NATIVE);
return;
}
if (LABEL_IS_SGI) {
sgi_add_partition(get_partition(0, partitions), LINUX_NATIVE);
return;
}
if (LABEL_IS_AIX) {
printf(_("\tSorry - this fdisk cannot handle AIX disk labels."
"\n\tIf you want to add DOS-type partitions, create"
"\n\ta new empty DOS partition table first. (Use o.)"
"\n\tWARNING: "
"This will destroy the present disk contents.\n"));
return;
}
for (i = 0; i < 4; i++)
free_primary += !ptes[i].part_table->sys_ind;
if (!free_primary && partitions >= MAXIMUM_PARTS) {
printf(_("The maximum number of partitions has been created\n"));
return;
}
if (!free_primary) {
if (extended_offset)
add_logical();
else
printf(_("You must delete some partition and add "
"an extended partition first\n"));
} else {
char c, line[LINE_LENGTH];
snprintf(line, sizeof(line),
"Command action\n"
" %s\n"
" p primary partition (1-4)\n",
(extended_offset ?
"l logical (5 or over)" : "e extended"));
while (1) {
c = read_nonempty(line);
if (c == 'p' || c == 'P') {
i = get_nonexisting_partition(0, 4);
if (i >= 0)
add_partition(i, LINUX_NATIVE);
return;
}
else if (c == 'l' && extended_offset) {
add_logical();
return;
}
else if (c == 'e' && !extended_offset) {
i = get_nonexisting_partition(0, 4);
if (i >= 0)
add_partition(i, EXTENDED);
return;
}
else
printf(_("Invalid partition number "
"for type '%c'\n"), c);
}
}
}
static void
write_table(void)
{
int i;
if (LABEL_IS_DOS) {
for (i = 0; i < 3; i++)
if (ptes[i].changed)
ptes[3].changed = 1;
for (i = 3; i < partitions; i++) {
struct pte *pe = &ptes[i];
if (pe->changed) {
write_part_table_flag(pe->sectorbuffer);
write_sector(pe->offset, pe->sectorbuffer);
}
}
}
else if (LABEL_IS_SGI) {
/* no test on change? the printf below might be mistaken */
sgi_write_table();
}
else if (LABEL_IS_SUN) {
int needw = 0;
for (i = 0; i < 8; i++)
if (ptes[i].changed)
needw = 1;
if (needw)
sun_write_table();
}
printf(_("The partition table has been altered!\n\n"));
reread_partition_table(1);
}
static void
reread_partition_table(int leave)
{
int i;
printf(_("Calling ioctl() to re-read partition table\n"));
sync();
sleep(2); /* Huh? */
i = ioctl(fd, BLKRRPART);
#if 0
else {
/* some kernel versions (1.2.x) seem to have trouble
rereading the partition table, but if asked to do it
twice, the second time works. - biro@yggdrasil.com */
sync();
sleep(2);
i = ioctl(fd, BLKRRPART);
}
#endif
if (i) {
bb_perror_msg("WARNING: rereading partition table "
"failed, kernel still uses old table");
}
#if 0
if (dos_changed)
printf(
_("\nWARNING: If you have created or modified any DOS 6.x\n"
"partitions, please see the fdisk manual page for additional\n"
"information.\n"));
#endif
if (leave) {
if (ENABLE_FEATURE_CLEAN_UP)
close(fd);
exit(i != 0);
}
}
#endif /* FEATURE_FDISK_WRITABLE */
#if ENABLE_FEATURE_FDISK_ADVANCED
#define MAX_PER_LINE 16
static void
print_buffer(char *pbuffer)
{
int i,l;
for (i = 0, l = 0; i < sector_size; i++, l++) {
if (l == 0)
printf("0x%03X:", i);
printf(" %02X", (unsigned char) pbuffer[i]);
if (l == MAX_PER_LINE - 1) {
puts("");
l = -1;
}
}
if (l > 0)
puts("");
puts("");
}
static void
print_raw(void)
{
int i;
printf(_("Device: %s\n"), disk_device);
if (LABEL_IS_SGI || LABEL_IS_SUN)
print_buffer(MBRbuffer);
else {
for (i = 3; i < partitions; i++)
print_buffer(ptes[i].sectorbuffer);
}
}
static void
move_begin(int i)
{
struct pte *pe = &ptes[i];
struct partition *p = pe->part_table;
off_t new, first;
if (warn_geometry())
return;
if (!p->sys_ind || !get_nr_sects(p) || IS_EXTENDED(p->sys_ind)) {
printf(_("Partition %d has no data area\n"), i + 1);
return;
}
first = get_partition_start(pe);
new = read_int(first, first, first + get_nr_sects(p) - 1, first,
_("New beginning of data")) - pe->offset;
if (new != get_nr_sects(p)) {
first = get_nr_sects(p) + get_start_sect(p) - new;
set_nr_sects(p, first);
set_start_sect(p, new);
pe->changed = 1;
}
}
static void
xselect(void)
{
char c;
while (1) {
putchar('\n');
c = tolower(read_nonempty(_("Expert command (m for help): ")));
switch (c) {
case 'a':
if (LABEL_IS_SUN)
sun_set_alt_cyl();
break;
case 'b':
if (LABEL_IS_DOS)
move_begin(get_partition(0, partitions));
break;
case 'c':
user_cylinders = cylinders =
read_int(1, cylinders, 1048576, 0,
_("Number of cylinders"));
if (LABEL_IS_SUN)
sun_set_ncyl(cylinders);
if (LABEL_IS_DOS)
warn_cylinders();
break;
case 'd':
print_raw();
break;
case 'e':
if (LABEL_IS_SGI)
sgi_set_xcyl();
else if (LABEL_IS_SUN)
sun_set_xcyl();
else if (LABEL_IS_DOS)
x_list_table(1);
break;
case 'f':
if (LABEL_IS_DOS)
fix_partition_table_order();
break;
case 'g':
#if ENABLE_FEATURE_SGI_LABEL
create_sgilabel();
#endif
break;
case 'h':
user_heads = heads = read_int(1, heads, 256, 0,
_("Number of heads"));
update_units();
break;
case 'i':
if (LABEL_IS_SUN)
sun_set_ilfact();
break;
case 'o':
if (LABEL_IS_SUN)
sun_set_rspeed();
break;
case 'p':
if (LABEL_IS_SUN)
list_table(1);
else
x_list_table(0);
break;
case 'q':
close(fd);
puts("");
exit(0);
case 'r':
return;
case 's':
user_sectors = sectors = read_int(1, sectors, 63, 0,
_("Number of sectors"));
if (dos_compatible_flag) {
sector_offset = sectors;
printf(_("Warning: setting sector offset for DOS "
"compatiblity\n"));
}
update_units();
break;
case 'v':
verify();
break;
case 'w':
write_table(); /* does not return */
break;
case 'y':
if (LABEL_IS_SUN)
sun_set_pcylcount();
break;
default:
xmenu();
}
}
}
#endif /* ADVANCED mode */
static int
is_ide_cdrom_or_tape(const char *device)
{
FILE *procf;
char buf[100];
struct stat statbuf;
int is_ide = 0;
/* No device was given explicitly, and we are trying some
likely things. But opening /dev/hdc may produce errors like
"hdc: tray open or drive not ready"
if it happens to be a CD-ROM drive. It even happens that
the process hangs on the attempt to read a music CD.
So try to be careful. This only works since 2.1.73. */
if (strncmp("/dev/hd", device, 7))
return 0;
snprintf(buf, sizeof(buf), "/proc/ide/%s/media", device+5);
procf = fopen(buf, "r");
if (procf != NULL && fgets(buf, sizeof(buf), procf))
is_ide = (!strncmp(buf, "cdrom", 5) ||
!strncmp(buf, "tape", 4));
else
/* Now when this proc file does not exist, skip the
device when it is read-only. */
if (stat(device, &statbuf) == 0)
is_ide = ((statbuf.st_mode & 0222) == 0);
if (procf)
fclose(procf);
return is_ide;
}
static void
trydev(const char *device, int user_specified)
{
int gb;
disk_device = device;
if (setjmp(listingbuf))
return;
if (!user_specified)
if (is_ide_cdrom_or_tape(device))
return;
fd = open(disk_device, type_open);
if (fd >= 0) {
gb = get_boot(try_only);
if (gb > 0) { /* I/O error */
close(fd);
} else if (gb < 0) { /* no DOS signature */
list_disk_geometry();
if (LABEL_IS_AIX) {
return;
}
#if ENABLE_FEATURE_OSF_LABEL
if (bsd_trydev(device) < 0)
#endif
printf(_("Disk %s doesn't contain a valid "
"partition table\n"), device);
close(fd);
} else {
close(fd);
list_table(0);
#if ENABLE_FEATURE_FDISK_WRITABLE
if (!LABEL_IS_SUN && partitions > 4){
delete_partition(ext_index);
}
#endif
}
} else {
/* Ignore other errors, since we try IDE
and SCSI hard disks which may not be
installed on the system. */
if (errno == EACCES) {
printf(_("Cannot open %s\n"), device);
return;
}
}
}
/* for fdisk -l: try all things in /proc/partitions
that look like a partition name (do not end in a digit) */
static void
tryprocpt(void)
{
FILE *procpt;
char line[100], ptname[100], devname[120], *s;
int ma, mi, sz;
procpt = fopen_or_warn("/proc/partitions", "r");
while (fgets(line, sizeof(line), procpt)) {
if (sscanf(line, " %d %d %d %[^\n ]",
&ma, &mi, &sz, ptname) != 4)
continue;
for (s = ptname; *s; s++);
if (isdigit(s[-1]))
continue;
sprintf(devname, "/dev/%s", ptname);
trydev(devname, 0);
}
#if ENABLE_FEATURE_CLEAN_UP
fclose(procpt);
#endif
}
#if ENABLE_FEATURE_FDISK_WRITABLE
static void
unknown_command(int c)
{
printf(_("%c: unknown command\n"), c);
}
#endif
int fdisk_main(int argc, char **argv)
{
char *str_b, *str_C, *str_H, *str_S;
unsigned opt;
/*
* fdisk -v
* fdisk -l [-b sectorsize] [-u] device ...
* fdisk -s [partition] ...
* fdisk [-b sectorsize] [-u] device
*
* Options -C, -H, -S set the geometry.
*/
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,
};
opt = getopt32(argc, argv, "b:C:H:lS:u" USE_FEATURE_FDISK_BLKSIZE("s"),
&str_b, &str_C, &str_H, &str_S);
argc -= optind;
argv += optind;
if (opt & OPT_b) { // -b
/* Ugly: this sector size is really per device,
so cannot be combined with multiple disks,
and the same goes for the C/H/S options.
*/
sector_size = xatoi_u(str_b);
if (sector_size != 512 && sector_size != 1024 &&
sector_size != 2048)
bb_show_usage();
sector_offset = 2;
user_set_sector_size = 1;
}
if (opt & OPT_C) user_cylinders = xatoi_u(str_C); // -C
if (opt & OPT_H) { // -H
user_heads = xatoi_u(str_H);
if (user_heads <= 0 || user_heads >= 256)
user_heads = 0;
}
//if (opt & OPT_l) // -l
if (opt & OPT_S) { // -S
user_sectors = xatoi_u(str_S);
if (user_sectors <= 0 || user_sectors >= 64)
user_sectors = 0;
}
if (opt & OPT_u) display_in_cyl_units = 0; // -u
//if (opt & OPT_s) // -s
if (user_set_sector_size && argc != 1)
printf(_("Warning: the -b (set sector size) option should"
" be used with one specified device\n"));
#if ENABLE_FEATURE_FDISK_WRITABLE
if (opt & OPT_l) {
nowarn = 1;
#endif
type_open = O_RDONLY;
if (argc > 0) {
int k;
#if defined(__GNUC__)
/* avoid gcc warning:
variable `k' might be clobbered by `longjmp' */
(void)&k;
#endif
listing = 1;
for (k = 0; k < argc; k++)
trydev(argv[k], 1);
} else {
/* we no longer have default device names */
/* but, we can use /proc/partitions instead */
tryprocpt();
}
return 0;
#if ENABLE_FEATURE_FDISK_WRITABLE
}
#endif
#if ENABLE_FEATURE_FDISK_BLKSIZE
if (opt & OPT_s) {
long size;
int j;
nowarn = 1;
type_open = O_RDONLY;
if (argc <= 0)
bb_show_usage();
for (j = 0; j < argc; j++) {
disk_device = argv[j];
fd = open(disk_device, type_open);
if (fd < 0)
fdisk_fatal(unable_to_open);
if (ioctl(fd, BLKGETSIZE, &size))
fdisk_fatal(ioctl_error);
close(fd);
if (argc == 1)
printf("%ld\n", size/2);
else
printf("%s: %ld\n", argv[j], size/2);
}
return 0;
}
#endif
#if ENABLE_FEATURE_FDISK_WRITABLE
if (argc != 1)
bb_show_usage();
disk_device = argv[0];
get_boot(fdisk);
if (LABEL_IS_OSF) {
/* OSF label, and no DOS label */
printf(_("Detected an OSF/1 disklabel on %s, entering "
"disklabel mode.\n"), disk_device);
bsd_select();
/*Why do we do this? It seems to be counter-intuitive*/
current_label_type = label_dos;
/* If we return we may want to make an empty DOS label? */
}
while (1) {
int c;
putchar('\n');
c = tolower(read_nonempty(_("Command (m for help): ")));
switch (c) {
case 'a':
if (LABEL_IS_DOS)
toggle_active(get_partition(1, partitions));
else if (LABEL_IS_SUN)
toggle_sunflags(get_partition(1, partitions),
0x01);
else if (LABEL_IS_SGI)
sgi_set_bootpartition(
get_partition(1, partitions));
else
unknown_command(c);
break;
case 'b':
if (LABEL_IS_SGI) {
printf(_("\nThe current boot file is: %s\n"),
sgi_get_bootfile());
if (read_maybe_empty(_("Please enter the name of the "
"new boot file: ")) == '\n')
printf(_("Boot file unchanged\n"));
else
sgi_set_bootfile(line_ptr);
}
#if ENABLE_FEATURE_OSF_LABEL
else
bsd_select();
#endif
break;
case 'c':
if (LABEL_IS_DOS)
toggle_dos_compatibility_flag();
else if (LABEL_IS_SUN)
toggle_sunflags(get_partition(1, partitions),
0x10);
else if (LABEL_IS_SGI)
sgi_set_swappartition(
get_partition(1, partitions));
else
unknown_command(c);
break;
case 'd':
{
int j;
/* If sgi_label then don't use get_existing_partition,
let the user select a partition, since
get_existing_partition() only works for Linux-like
partition tables */
if (!LABEL_IS_SGI) {
j = get_existing_partition(1, partitions);
} else {
j = get_partition(1, partitions);
}
if (j >= 0)
delete_partition(j);
}
break;
case 'i':
if (LABEL_IS_SGI)
create_sgiinfo();
else
unknown_command(c);
case 'l':
list_types(get_sys_types());
break;
case 'm':
menu();
break;
case 'n':
new_partition();
break;
case 'o':
create_doslabel();
break;
case 'p':
list_table(0);
break;
case 'q':
close(fd);
puts("");
return 0;
case 's':
#if ENABLE_FEATURE_SUN_LABEL
create_sunlabel();
#endif
break;
case 't':
change_sysid();
break;
case 'u':
change_units();
break;
case 'v':
verify();
break;
case 'w':
write_table(); /* does not return */
break;
#if ENABLE_FEATURE_FDISK_ADVANCED
case 'x':
if (LABEL_IS_SGI) {
printf(_("\n\tSorry, no experts menu for SGI "
"partition tables available.\n\n"));
} else
xselect();
break;
#endif
default:
unknown_command(c);
menu();
}
}
return 0;
#endif /* FEATURE_FDISK_WRITABLE */
}
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