blob: dac14c2f5502ffa4046a4e0307cc23c1e55c6318 [file] [log] [blame]
/* fdisk.c -- Partition table manipulator for Linux.
*
* Copyright (C) 1992 A. V. Le Blanc (LeBlanc@mcc.ac.uk)
*
* This program is free software. You can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation: either version 1 or
* (at your option) any later version.
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <ctype.h>
#include <setjmp.h>
#include <errno.h>
#include <getopt.h>
#include <sys/stat.h>
#include <time.h>
#include "nls.h"
#include "common.h"
#include "fdisk.h"
#include "fdisksunlabel.h"
#include "fdisksgilabel.h"
#include "fdiskaixlabel.h"
#include "fdiskmaclabel.h"
#ifdef HAVE_LINUX_COMPILER_H
#include <linux/compiler.h>
#endif
#ifdef HAVE_LINUX_BLKPG_H
#include <linux/blkpg.h>
#endif
#include "gpt.h"
static void delete_partition(int i);
#define hex_val(c) ({ \
char _c = (c); \
isdigit(_c) ? _c - '0' : \
tolower(_c) + 10 - 'a'; \
})
#define LINE_LENGTH 800
#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; \
}
/* A valid partition table sector ends in 0x55 0xaa */
static unsigned int
part_table_flag(unsigned char *b) {
return ((unsigned int) b[510]) + (((unsigned int) b[511]) << 8);
}
int
valid_part_table_flag(unsigned char *b) {
return (b[510] == 0x55 && b[511] == 0xaa);
}
static void
write_part_table_flag(unsigned char *b) {
b[510] = 0x55;
b[511] = 0xaa;
}
/* 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 int val) {
cp[0] = (val & 0xff);
cp[1] = ((val >> 8) & 0xff);
cp[2] = ((val >> 16) & 0xff);
cp[3] = ((val >> 24) & 0xff);
}
static unsigned int
read4_little_endian(const unsigned char *cp) {
return (unsigned int)(cp[0]) + ((unsigned int)(cp[1]) << 8)
+ ((unsigned int)(cp[2]) << 16)
+ ((unsigned int)(cp[3]) << 24);
}
static void
set_start_sect(struct partition *p, unsigned int start_sect) {
store4_little_endian(p->start4, start_sect);
}
unsigned long long
get_start_sect(struct partition *p) {
return read4_little_endian(p->start4);
}
static void
set_nr_sects(struct partition *p, unsigned long long nr_sects) {
store4_little_endian(p->size4, nr_sects);
}
unsigned long long
get_nr_sects(struct partition *p) {
return read4_little_endian(p->size4);
}
static ssize_t
xread(int fd, void *buf, size_t count) {
char *p = buf;
ssize_t out = 0;
ssize_t rv;
while (count) {
rv = read(fd, p, count);
if (rv == -1) {
if (errno == EINTR || errno == EAGAIN)
continue;
return out ? out : -1; /* Error */
} else if (rv == 0) {
return out; /* EOF */
}
p += rv;
out += rv;
count -= rv;
}
return out;
}
static unsigned int
get_random_id(void) {
int fd;
unsigned int v;
ssize_t rv = -1;
fd = open("/dev/urandom", O_RDONLY);
if (fd >= 0) {
rv = xread(fd, &v, sizeof v);
close(fd);
}
if (rv == sizeof v)
return v;
/* Fallback: sucks, but better than nothing */
return (unsigned int)(getpid() + time(NULL));
}
/* normally O_RDWR, -l option gives O_RDONLY */
static int type_open = O_RDWR;
/*
* Raw disk label. For DOS-type partition tables the MBR,
* with descriptions of the primary partitions.
*/
unsigned char MBRbuffer[MAX_SECTOR_SIZE];
/*
* 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 */
char changed; /* boolean */
unsigned long long offset; /* disk sector number */
unsigned char *sectorbuffer; /* disk sector contents */
} ptes[MAXIMUM_PARTS];
char *disk_device, /* must be specified */
*line_ptr, /* interactive input */
line_buffer[LINE_LENGTH];
int fd, /* the disk */
ext_index, /* the prime extended partition */
listing = 0, /* no aborts for fdisk -l */
nowarn = 0, /* no warnings for fdisk -l/-s */
dos_compatible_flag = ~0,
dos_changed = 0,
partitions = 4; /* maximum partition + 1 */
unsigned int user_cylinders, user_heads, user_sectors;
unsigned int pt_heads, pt_sectors;
unsigned int kern_heads, kern_sectors;
unsigned long long sector_offset = 1, extended_offset = 0, sectors;
unsigned int heads,
cylinders,
sector_size = DEFAULT_SECTOR_SIZE,
user_set_sector_size = 0,
units_per_sector = 1,
display_in_cyl_units = 1;
unsigned long long total_number_of_sectors;
#define dos_label (!sun_label && !sgi_label && !aix_label && !mac_label && !osf_label)
int sun_label = 0; /* looking at sun disklabel */
int sgi_label = 0; /* looking at sgi disklabel */
int aix_label = 0; /* looking at aix disklabel */
int osf_label = 0; /* looking at OSF/1 disklabel */
int mac_label = 0; /* looking at mac disklabel */
int possibly_osf_label = 0;
jmp_buf listingbuf;
void fatal(enum failure why) {
char error[LINE_LENGTH],
*message = error;
if (listing) {
close(fd);
longjmp(listingbuf, 1);
}
switch (why) {
case usage: message = _(
"Usage: fdisk [-b SSZ] [-u] DISK Change partition table\n"
" fdisk -l [-b SSZ] [-u] DISK List partition table(s)\n"
" fdisk -s PARTITION Give partition size(s) in blocks\n"
" fdisk -v Give fdisk version\n"
"Here DISK is something like /dev/hdb or /dev/sda\n"
"and PARTITION is something like /dev/hda7\n"
"-u: give Start and End in sector (instead of cylinder) units\n"
"-b 2048: (for certain MO disks) use 2048-byte sectors\n");
break;
case usage2:
/* msg in cases where fdisk used to probe */
message = _(
"Usage: fdisk [-l] [-b SSZ] [-u] device\n"
"E.g.: fdisk /dev/hda (for the first IDE disk)\n"
" or: fdisk /dev/sdc (for the third SCSI disk)\n"
" or: fdisk /dev/eda (for the first PS/2 ESDI drive)\n"
" or: fdisk /dev/rd/c0d0 or: fdisk /dev/ida/c0d0 (for RAID devices)\n"
" ...\n");
break;
case unable_to_open:
snprintf(error, sizeof(error),
_("Unable to open %s\n"), disk_device);
break;
case unable_to_read:
snprintf(error, sizeof(error),
_("Unable to read %s\n"), disk_device);
break;
case unable_to_seek:
snprintf(error, sizeof(error),
_("Unable to seek on %s\n"),disk_device);
break;
case unable_to_write:
snprintf(error, sizeof(error),
_("Unable to write %s\n"), disk_device);
break;
case ioctl_error:
snprintf(error, sizeof(error),
_("BLKGETSIZE ioctl failed on %s\n"),
disk_device);
break;
case out_of_memory:
message = _("Unable to allocate any more memory\n");
break;
default:
message = _("Fatal error\n");
}
fputc('\n', stderr);
fputs(message, stderr);
exit(1);
}
static void
seek_sector(int fd, unsigned long long secno) {
off_t offset = (off_t) secno * sector_size;
if (lseek(fd, offset, SEEK_SET) == (off_t) -1)
fatal(unable_to_seek);
}
static void
read_sector(int fd, unsigned long long secno, unsigned char *buf) {
seek_sector(fd, secno);
if (read(fd, buf, sector_size) != sector_size)
fatal(unable_to_read);
}
static void
write_sector(int fd, unsigned long long secno, unsigned char *buf) {
seek_sector(fd, secno);
if (write(fd, buf, sector_size) != sector_size)
fatal(unable_to_write);
}
/* Allocate a buffer and read a partition table sector */
static void
read_pte(int fd, int pno, unsigned long long offset) {
struct pte *pe = &ptes[pno];
pe->offset = offset;
pe->sectorbuffer = malloc(sector_size);
if (!pe->sectorbuffer)
fatal(out_of_memory);
read_sector(fd, offset, pe->sectorbuffer);
pe->changed = 0;
pe->part_table = pe->ext_pointer = NULL;
}
static unsigned long long
get_partition_start(struct pte *pe) {
return pe->offset + get_start_sect(pe->part_table);
}
struct partition *
get_part_table(int i) {
return ptes[i].part_table;
}
void
set_all_unchanged(void) {
int i;
for (i = 0; i < MAXIMUM_PARTS; i++)
ptes[i].changed = 0;
}
void
set_changed(int i) {
ptes[i].changed = 1;
}
static int
is_garbage_table(void) {
int i;
for (i = 0; i < 4; i++) {
struct pte *pe = &ptes[i];
struct partition *p = pe->part_table;
if (p->boot_ind != 0 && p->boot_ind != 0x80)
return 1;
}
return 0;
}
/*
* 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) {
if (sun_label) {
puts(_("Command action"));
puts(_(" a toggle a read only flag")); /* sun */
puts(_(" b edit bsd disklabel"));
puts(_(" c toggle the mountable flag")); /* sun */
puts(_(" d delete a partition"));
puts(_(" l list known partition types"));
puts(_(" m print this menu"));
puts(_(" n add a new partition"));
puts(_(" o create a new empty DOS partition table"));
puts(_(" p print the partition table"));
puts(_(" q quit without saving changes"));
puts(_(" s create a new empty Sun disklabel")); /* sun */
puts(_(" t change a partition's system id"));
puts(_(" u change display/entry units"));
puts(_(" v verify the partition table"));
puts(_(" w write table to disk and exit"));
puts(_(" x extra functionality (experts only)"));
}
else if (sgi_label) {
puts(_("Command action"));
puts(_(" a select bootable partition")); /* sgi flavour */
puts(_(" b edit bootfile entry")); /* sgi */
puts(_(" c select sgi swap partition")); /* sgi flavour */
puts(_(" d delete a partition"));
puts(_(" l list known partition types"));
puts(_(" m print this menu"));
puts(_(" n add a new partition"));
puts(_(" o create a new empty DOS partition table"));
puts(_(" p print the partition table"));
puts(_(" q quit without saving changes"));
puts(_(" s create a new empty Sun disklabel")); /* sun */
puts(_(" t change a partition's system id"));
puts(_(" u change display/entry units"));
puts(_(" v verify the partition table"));
puts(_(" w write table to disk and exit"));
}
else if (aix_label || mac_label) {
puts(_("Command action"));
puts(_(" m print this menu"));
puts(_(" o create a new empty DOS partition table"));
puts(_(" q quit without saving changes"));
puts(_(" s create a new empty Sun disklabel")); /* sun */
}
else {
puts(_("Command action"));
puts(_(" a toggle a bootable flag"));
puts(_(" b edit bsd disklabel"));
puts(_(" c toggle the dos compatibility flag"));
puts(_(" d delete a partition"));
puts(_(" l list known partition types"));
puts(_(" m print this menu"));
puts(_(" n add a new partition"));
puts(_(" o create a new empty DOS partition table"));
puts(_(" p print the partition table"));
puts(_(" q quit without saving changes"));
puts(_(" s create a new empty Sun disklabel")); /* sun */
puts(_(" t change a partition's system id"));
puts(_(" u change display/entry units"));
puts(_(" v verify the partition table"));
puts(_(" w write table to disk and exit"));
puts(_(" x extra functionality (experts only)"));
}
}
static void
xmenu(void) {
if (sun_label) {
puts(_("Command action"));
puts(_(" a change number of alternate cylinders")); /*sun*/
puts(_(" c change number of cylinders"));
puts(_(" d print the raw data in the partition table"));
puts(_(" e change number of extra sectors per cylinder"));/*sun*/
puts(_(" h change number of heads"));
puts(_(" i change interleave factor")); /*sun*/
puts(_(" o change rotation speed (rpm)")); /*sun*/
puts(_(" m print this menu"));
puts(_(" p print the partition table"));
puts(_(" q quit without saving changes"));
puts(_(" r return to main menu"));
puts(_(" s change number of sectors/track"));
puts(_(" v verify the partition table"));
puts(_(" w write table to disk and exit"));
puts(_(" y change number of physical cylinders")); /*sun*/
}
else if (sgi_label) {
puts(_("Command action"));
puts(_(" b move beginning of data in a partition")); /* !sun */
puts(_(" c change number of cylinders"));
puts(_(" d print the raw data in the partition table"));
puts(_(" e list extended partitions")); /* !sun */
puts(_(" g create an IRIX (SGI) partition table"));/* sgi */
puts(_(" h change number of heads"));
puts(_(" m print this menu"));
puts(_(" p print the partition table"));
puts(_(" q quit without saving changes"));
puts(_(" r return to main menu"));
puts(_(" s change number of sectors/track"));
puts(_(" v verify the partition table"));
puts(_(" w write table to disk and exit"));
}
else if (aix_label || mac_label) {
puts(_("Command action"));
puts(_(" b move beginning of data in a partition")); /* !sun */
puts(_(" c change number of cylinders"));
puts(_(" d print the raw data in the partition table"));
puts(_(" e list extended partitions")); /* !sun */
puts(_(" g create an IRIX (SGI) partition table"));/* sgi */
puts(_(" h change number of heads"));
puts(_(" m print this menu"));
puts(_(" p print the partition table"));
puts(_(" q quit without saving changes"));
puts(_(" r return to main menu"));
puts(_(" s change number of sectors/track"));
puts(_(" v verify the partition table"));
puts(_(" w write table to disk and exit"));
}
else {
puts(_("Command action"));
puts(_(" b move beginning of data in a partition")); /* !sun */
puts(_(" c change number of cylinders"));
puts(_(" d print the raw data in the partition table"));
puts(_(" e list extended partitions")); /* !sun */
puts(_(" f fix partition order")); /* !sun, !aix, !sgi */
puts(_(" g create an IRIX (SGI) partition table"));/* sgi */
puts(_(" h change number of heads"));
puts(_(" i change the disk identifier")); /* dos only */
puts(_(" m print this menu"));
puts(_(" p print the partition table"));
puts(_(" q quit without saving changes"));
puts(_(" r return to main menu"));
puts(_(" s change number of sectors/track"));
puts(_(" v verify the partition table"));
puts(_(" w write table to disk and exit"));
}
}
static int
get_sysid(int i) {
return (
sun_label ? sun_get_sysid(i) :
sgi_label ? sgi_get_sysid(i) :
ptes[i].part_table->sys_ind);
}
static struct systypes *
get_sys_types(void) {
return (
sun_label ? sun_sys_types :
sgi_label ? sgi_sys_types :
i386_sys_types);
}
char *partition_type(unsigned char type)
{
int i;
struct systypes *types = get_sys_types();
for (i=0; types[i].name; i++)
if (types[i].type == type)
return _(types[i].name);
return NULL;
}
void list_types(struct systypes *sys)
{
unsigned int last[4], done = 0, next = 0, size;
int i;
for (i = 0; sys[i].name; i++);
size = i;
for (i = 3; i >= 0; i--)
last[3 - i] = done += (size + i - done) / (i + 1);
i = done = 0;
do {
printf("%c%2x %-15.15s", i ? ' ' : '\n',
sys[next].type, _(sys[next].name));
next = last[i++] + done;
if (i > 3 || next >= last[i]) {
i = 0;
next = ++done;
}
} while (done < last[0]);
putchar('\n');
}
static int
is_cleared_partition(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;
p->boot_ind = 0;
p->head = 0;
p->sector = 0;
p->cyl = 0;
p->sys_ind = 0;
p->end_head = 0;
p->end_sector = 0;
p->end_cyl = 0;
set_start_sect(p,0);
set_nr_sects(p,0);
}
static void
set_partition(int i, int doext, unsigned long long start,
unsigned long long stop, int sysid) {
struct partition *p;
unsigned long long 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;
}
static int
test_c(char **m, char *mesg) {
int val = 0;
if (!*m)
fprintf(stderr, _("You must set"));
else {
fprintf(stderr, " %s", *m);
val = 1;
}
*m = mesg;
return val;
}
static int
warn_geometry(void) {
char *m = NULL;
int prev = 0;
if (sgi_label) /* cannot set cylinders etc anyway */
return 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;
fprintf(stderr,
_("%s%s.\nYou can do this from the extra functions menu.\n"),
prev ? _(" and ") : " ", m);
return 1;
}
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 */
}
static void
warn_cylinders(void) {
if (dos_label && cylinders > 1024 && !nowarn)
fprintf(stderr, _("\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);
}
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)) {
fprintf(stderr,
_("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];
fprintf(stderr,
_("Warning: omitting partitions after #%d.\n"
"They will be deleted "
"if you save this partition table.\n"),
partitions);
clear_partition(pre->ext_pointer);
pre->changed = 1;
return;
}
read_pte(fd, partitions, 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)
fprintf(stderr,
_("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)
fprintf(stderr,
_("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++;
}
/* 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 */
}
}
}
static void
dos_write_mbr_id(unsigned char *b, unsigned int id) {
store4_little_endian(&b[440], id);
}
static unsigned int
dos_read_mbr_id(const unsigned char *b) {
return read4_little_endian(&b[440]);
}
static void
dos_print_mbr_id(void) {
printf(_("Disk identifier: 0x%08x\n"), dos_read_mbr_id(MBRbuffer));
}
static void
dos_set_mbr_id(void) {
unsigned long new_id;
char *ep;
char ps[64];
snprintf(ps, sizeof ps, _("New disk identifier (current 0x%08x): "),
dos_read_mbr_id(MBRbuffer));
if (read_chars(ps) == '\n')
return;
new_id = strtoul(line_ptr, &ep, 0);
if (*ep != '\n')
return;
dos_write_mbr_id(MBRbuffer, new_id);
dos_print_mbr_id();
}
static void
create_doslabel(void) {
unsigned int id = get_random_id();
fprintf(stderr,
_("Building a new DOS disklabel with disk identifier 0x%08x.\n"
"Changes will remain in memory only, until you decide to write them.\n"
"After that, of course, the previous content won't be recoverable.\n\n"),
id);
sun_nolabel(); /* otherwise always recognised as sun */
sgi_nolabel(); /* otherwise always recognised as sgi */
mac_label = aix_label = osf_label = possibly_osf_label = 0;
partitions = 4;
/* Zero out the MBR buffer */
extended_offset = 0;
set_all_unchanged();
set_changed(0);
get_boot(create_empty_dos);
/* Generate an MBR ID for this disk */
dos_write_mbr_id(MBRbuffer, id);
/* Mark it bootable (unfortunately required) */
write_part_table_flag(MBRbuffer);
}
#include <sys/utsname.h>
#define MAKE_VERSION(p,q,r) (65536*(p) + 256*(q) + (r))
static int
linux_version_code(void) {
static int kernel_version = 0;
struct utsname my_utsname;
int p, q, r;
if (!kernel_version && uname(&my_utsname) == 0) {
p = atoi(strtok(my_utsname.release, "."));
q = atoi(strtok(NULL, "."));
r = atoi(strtok(NULL, "."));
kernel_version = MAKE_VERSION(p,q,r);
}
return kernel_version;
}
static void
get_sectorsize(int fd) {
#if defined(BLKSSZGET)
if (!user_set_sector_size &&
linux_version_code() >= MAKE_VERSION(2,3,3)) {
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);
}
#else
/* maybe the user specified it; and otherwise we still
have the DEFAULT_SECTOR_SIZE default */
#endif
}
static void
get_kernel_geometry(int fd) {
#ifdef HDIO_GETGEO
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 */
}
#endif
}
static void
get_partition_table_geometry(void) {
unsigned char *bufp = MBRbuffer;
struct partition *p;
int i, h, s, hh, ss;
int first = 1;
int bad = 0;
if (!(valid_part_table_flag(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;
}
}
void
get_geometry(int fd, struct geom *g) {
int sec_fac;
unsigned long long llsectors, llcyls;
get_sectorsize(fd);
sec_fac = sector_size / 512;
guess_device_type(fd);
heads = cylinders = sectors = 0;
kern_heads = kern_sectors = 0;
pt_heads = pt_sectors = 0;
get_kernel_geometry(fd);
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 (disksize(fd, &llsectors))
llsectors = 0;
total_number_of_sectors = llsectors;
sector_offset = 1;
if (dos_compatible_flag)
sector_offset = sectors;
llcyls = total_number_of_sectors / (heads * sectors * sec_fac);
cylinders = llcyls;
if (cylinders != llcyls) /* truncated? */
cylinders = ~0;
if (!cylinders)
cylinders = user_cylinders;
if (g) {
g->heads = heads;
g->sectors = sectors;
g->cylinders = cylinders;
}
}
/*
* Read MBR. Returns:
* -1: no 0xaa55 flag present (possibly entire disk BSD)
* 0: found or created label
* 1: I/O error
*/
int
get_boot(enum action what) {
int i;
partitions = 4;
ext_index = 0;
extended_offset = 0;
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;
pe->changed = (what == create_empty_dos);
}
if (what == create_empty_sun && check_sun_label())
return 0;
memset(MBRbuffer, 0, 512);
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;
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;
fatal(unable_to_read);
}
get_geometry(fd, NULL);
update_units();
if (check_sun_label())
return 0;
if (check_sgi_label())
return 0;
if (check_aix_label())
return 0;
if (check_mac_label())
return 0;
if (check_osf_label()) {
possibly_osf_label = 1;
if (!valid_part_table_flag(MBRbuffer)) {
osf_label = 1;
return 0;
}
printf(_("This disk has both DOS and BSD magic.\n"
"Give the 'b' command to go to BSD mode.\n"));
}
got_dos_table:
if (!valid_part_table_flag(MBRbuffer)) {
switch(what) {
case fdisk:
fprintf(stderr,
_("Device contains neither a valid DOS "
"partition table, nor Sun, SGI or OSF "
"disklabel\n"));
#ifdef __sparc__
create_sunlabel();
#else
create_doslabel();
#endif
return 0;
case require:
return -1;
case try_only:
return -1;
case create_empty_dos:
case create_empty_sun:
break;
default:
fprintf(stderr, _("Internal error\n"));
exit(1);
}
}
warn_cylinders();
warn_geometry();
for (i = 0; i < 4; i++) {
struct pte *pe = &ptes[i];
if (IS_EXTENDED (pe->part_table->sys_ind)) {
if (partitions != 4)
fprintf(stderr, _("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)) {
fprintf(stderr,
_("Warning: invalid flag 0x%04x of partition "
"table %d will be corrected by w(rite)\n"),
part_table_flag(pe->sectorbuffer), i + 1);
pe->changed = 1;
}
}
return 0;
}
/* read line; return 0 or first char */
int
read_line(void)
{
static int got_eof = 0;
line_ptr = line_buffer;
if (!fgets(line_buffer, LINE_LENGTH, stdin)) {
if (feof(stdin))
got_eof++; /* user typed ^D ? */
if (got_eof >= 3) {
fflush(stdout);
fprintf(stderr, _("\ngot EOF thrice - exiting..\n"));
exit(1);
}
return 0;
}
while (*line_ptr && !isgraph(*line_ptr))
line_ptr++;
return *line_ptr;
}
char
read_char(char *mesg)
{
do {
fputs(mesg, stdout);
fflush (stdout); /* requested by niles@scyld.com */
} while (!read_line());
return *line_ptr;
}
char
read_chars(char *mesg)
{
fputs(mesg, stdout);
fflush (stdout); /* niles@scyld.com */
if (!read_line()) {
*line_ptr = '\n';
line_ptr[1] = 0;
}
return *line_ptr;
}
int
read_hex(struct systypes *sys)
{
int hex;
while (1)
{
read_char(_("Hex code (type L to list codes): "));
if (tolower(*line_ptr) == 'l')
list_types(sys);
else if (isxdigit (*line_ptr))
{
hex = 0;
do
hex = hex << 4 | hex_val(*line_ptr++);
while (isxdigit(*line_ptr));
return hex;
}
}
}
/*
* Print the message MESG, then read an integer in LOW..HIGH.
* If the user hits Enter, DFLT is returned, provided that is in LOW..HIGH.
* Answers like +10 are interpreted as offsets from BASE.
*
* There is no default if DFLT is not between LOW and HIGH.
*/
unsigned int
read_int(unsigned int low, unsigned int dflt, unsigned int high,
unsigned int base, char *mesg)
{
unsigned int i;
int default_ok = 1;
static char *ms = NULL;
static int mslen = 0;
if (!ms || strlen(mesg)+100 > mslen) {
mslen = strlen(mesg)+200;
if (!(ms = realloc(ms,mslen)))
fatal(out_of_memory);
}
if (dflt < low || dflt > high)
default_ok = 0;
if (default_ok)
snprintf(ms, mslen, _("%s (%u-%u, default %u): "),
mesg, low, high, dflt);
else
snprintf(ms, mslen, "%s (%u-%u): ",
mesg, low, high);
while (1) {
int use_default = default_ok;
/* ask question and read answer */
while (read_chars(ms) != '\n' && !isdigit(*line_ptr)
&& *line_ptr != '-' && *line_ptr != '+')
continue;
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 out of range.\n"));
}
return i;
}
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 ((!sun_label && !sgi_label && !pe->part_table->sys_ind)
|| (sun_label &&
(!sunlabel->partitions[i].num_sectors ||
!sunlabel->part_tags[i].tag))
|| (sgi_label && (!sgi_get_num_sectors(i)))
)
fprintf(stderr,
_("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);
}
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");
}
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)
fprintf(stderr,
_("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 (sun_label) {
sun_delete_partition(i);
return;
}
if (sgi_label) {
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 */
struct pte *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) {
char *temp;
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 (!sgi_label) {
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 && !sgi_label && !sun_label && !get_nr_sects(p))
printf(_("Partition %d does not exist yet!\n"), i + 1);
else while (1) {
sys = read_hex (get_sys_types());
if (!sys && !sgi_label && !sun_label) {
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 (!sun_label && !sgi_label) {
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 (sun_label && i == 2 && sys != SUN_TAG_BACKUP)
printf(_("Consider leaving partition 3 "
"as Whole disk (5),\n"
"as SunOS/Solaris expects it and "
"even Linux likes it.\n\n"));
if (sgi_label && ((i == 10 && sys != 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 (sun_label) {
ptes[i].changed = sun_change_sysid(i, sys);
} else
if (sgi_label) {
ptes[i].changed = sgi_change_sysid(i, sys);
} else {
p->sys_ind = sys;
ptes[i].changed = 1;
}
temp = partition_type(sys) ? : _("Unknown");
if (ptes[i].changed)
printf (_("Changed system type of partition %d "
"to %x (%s)\n"), i + 1, sys, temp);
else
printf (_("System type of partition %d is unchanged "
"to %x (%s)\n"), i + 1, sys, temp);
if (is_dos_partition(origsys) ||
is_dos_partition(sys))
dos_changed = 1;
break;
}
}
}
/* check_consistency() and long2chs() 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
long2chs(ulong ls, unsigned int *c, unsigned int *h, unsigned int *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(struct partition *p, int partition) {
unsigned int pbc, pbh, pbs; /* physical beginning c, h, s */
unsigned int pec, peh, pes; /* physical ending c, h, s */
unsigned int lbc, lbh, lbs; /* logical beginning c, h, s */
unsigned int 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) */
long2chs(get_start_sect(p), &lbc, &lbh, &lbs);
/* compute logical ending (c, h, s) */
long2chs(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);
}
#if 0
/* Beginning on cylinder boundary? */
if (pbh != !pbc || pbs != 1) {
printf(_("Partition %i does not start on cylinder "
"boundary:\n"), partition + 1);
printf(_(" phys=(%d, %d, %d) "), pbc, pbh, pbs);
printf(_("should be (%d, %d, 1)\n"), pbc, !pbc);
}
#endif
/* Ending on cylinder boundary? */
if (peh != (heads - 1) || pes != sectors) {
printf(_("Partition %i does not end on cylinder boundary.\n"),
partition + 1);
#if 0
printf(_(" phys=(%d, %d, %d) "), pec, peh, pes);
printf(_("should be (%d, %d, %d)\n"),
pec, heads - 1, sectors);
#endif
}
}
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, %llu sectors/track, %d cylinders"),
heads, sectors, cylinders);
if (units_per_sector == 1)
printf(_(", total %llu sectors"),
total_number_of_sectors / (sector_size/512));
printf("\n");
printf(_("Units = %s of %d * %d = %d bytes\n"),
str_units(PLURAL),
units_per_sector, sector_size, units_per_sector * sector_size);
if (dos_label)
dos_print_mbr_id();
printf("\n");
}
/*
* 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) {
struct pte *pe;
struct partition *p;
unsigned int 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;
}
/*
* 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");
}
static void
list_table(int xtra) {
struct partition *p;
char *type;
int i, w;
if (sun_label) {
sun_list_table(xtra);
return;
}
if (sgi_label) {
sgi_list_table(xtra);
return;
}
list_disk_geometry();
if (osf_label) {
xbsd_print_disklabel(xtra);
return;
}
if (is_garbage_table()) {
printf(_("This doesn't look like a partition table\n"
"Probably you selected the wrong device.\n\n"));
}
/* 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;
printf(_("%*s Boot Start End Blocks Id System\n"),
w+1, _("Device"));
for (i = 0; i < partitions; i++) {
struct pte *pe = &ptes[i];
p = pe->part_table;
if (p && !is_cleared_partition(p)) {
unsigned int psects = get_nr_sects(p);
unsigned int pblocks = psects;
unsigned int 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 %11lu %11lu %11lu%c %2x %s\n",
partname(disk_device, i+1, w+2),
/* boot flag */ !p->boot_ind ? ' ' : p->boot_ind == ACTIVE_FLAG
? '*' : '?',
/* start */ (unsigned long) cround(get_partition_start(pe)),
/* end */ (unsigned long) cround(get_partition_start(pe) + psects
- (psects ? 1 : 0)),
/* odd flag on end */ (unsigned long) pblocks, podd ? '+' : ' ',
/* type id */ p->sys_ind,
/* type name */ (type = partition_type(p->sys_ind)) ?
type : _("Unknown"));
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 (dos_label && wrong_p_order(NULL)) {
printf(_("\nPartition table entries are not in disk order\n"));
}
}
static void
x_list_table(int extend) {
struct pte *pe;
struct partition *p;
int i;
printf(_("\nDisk %s: %d heads, %llu 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%11lu%11lu %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),
(unsigned long) get_start_sect(p),
(unsigned long) get_nr_sects(p), p->sys_ind);
if (p->sys_ind)
check_consistency(p, i);
}
}
}
static void
fill_bounds(unsigned long long *first, unsigned long long *last) {
int i;
struct pte *pe = &ptes[0];
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 int h, unsigned int s, unsigned int c,
unsigned int start) {
unsigned int 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)
fprintf(stderr, _("Warning: partition %d contains sector 0\n"), n);
if (h >= heads)
fprintf(stderr,
_("Partition %d: head %d greater than maximum %d\n"),
n, h + 1, heads);
if (real_s >= sectors)
fprintf(stderr, _("Partition %d: sector %d greater than "
"maximum %llu\n"), n, s, sectors);
if (real_c >= cylinders)
fprintf(stderr, _("Partitions %d: cylinder %d greater than "
"maximum %d\n"), n, real_c + 1, cylinders);
if (cylinders <= 1024 && start != total)
fprintf(stderr,
_("Partition %d: previous sectors %d disagrees with "
"total %d\n"), n, start, total);
}
static void
verify(void) {
int i, j;
unsigned long total = 1;
unsigned long long first[partitions], last[partitions];
struct partition *p;
if (warn_geometry())
return;
if (sun_label) {
verify_sun();
return;
}
if (sgi_label) {
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];
unsigned long long 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 > total_number_of_sectors)
printf(_("Total allocated sectors %ld greater than the maximum"
" %lld\n"), total, total_number_of_sectors);
else if (total < total_number_of_sectors)
printf(_("%lld unallocated sectors\n"),
total_number_of_sectors - total);
}
static void
add_partition(int n, int sys) {
char mesg[256]; /* 48 does not suffice in Japanese */
int i, read = 0;
struct partition *p = ptes[n].part_table;
struct partition *q = ptes[ext_index].part_table;
long long llimit;
unsigned long long 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 && read) {
printf(_("Sector %llu is already allocated\n"), temp);
temp = start;
read = 0;
}
if (!read && start == temp) {
unsigned int i = start;
start = read_int(cround(i), cround(i), cround(limit),
0, mesg);
if (display_in_cyl_units) {
start = (start - 1) * units_per_sector;
if (start < i) start = i;
}
read = 1;
}
} while (start != temp || !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;
if (!(pe4->sectorbuffer = calloc(1, sector_size)))
fatal(out_of_memory);
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];
if (!(pe->sectorbuffer = calloc(1, sector_size)))
fatal(out_of_memory);
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 (sun_label) {
add_sun_partition(get_partition(0, partitions), LINUX_NATIVE);
return;
}
if (sgi_label) {
sgi_add_partition(get_partition(0, partitions), LINUX_NATIVE);
return;
}
if (aix_label) {
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;
}
if (mac_label) {
printf(_("\tSorry - this fdisk cannot handle Mac 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 if (partitions >= MAXIMUM_PARTS) {
printf(_("All logical partitions are in use\n"));
printf(_("Adding a primary partition\n"));
add_partition(get_partition(0, 4), LINUX_NATIVE);
} 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) {
if ((c = tolower(read_char(line))) == 'p') {
int 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) {
int 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 (dos_label) {
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(fd, pe->offset, pe->sectorbuffer);
}
}
}
else if (sgi_label) {
/* no test on change? the printf below might be mistaken */
sgi_write_table();
} else if (sun_label) {
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);
}
void
reread_partition_table(int leave) {
int error = 0;
int i;
printf(_("Calling ioctl() to re-read partition table.\n"));
sync();
sleep(2);
if ((i = ioctl(fd, BLKRRPART)) != 0) {
error = errno;
} 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);
if ((i = ioctl(fd, BLKRRPART)) != 0)
error = errno;
}
if (i) {
printf(_("\nWARNING: Re-reading the partition table "
"failed with error %d: %s.\n"
"The kernel still uses the old table.\n"
"The new table will be used "
"at the next reboot.\n"),
error, strerror(error));
}
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"));
if (leave) {
if (fsync(fd) || close(fd)) {
fprintf(stderr, _("\nError closing file\n"));
exit(1);
}
printf(_("Syncing disks.\n"));
sync();
sleep(4); /* for sync() */
exit(!!i);
}
}
#define MAX_PER_LINE 16
static void
print_buffer(unsigned char pbuffer[]) {
int i,
l;
for (i = 0, l = 0; i < sector_size; i++, l++) {
if (l == 0)
printf("0x%03X:", i);
printf(" %02X", pbuffer[i]);
if (l == MAX_PER_LINE - 1) {
printf("\n");
l = -1;
}
}
if (l > 0)
printf("\n");
printf("\n");
}
static void
print_raw(void) {
int i;
printf(_("Device: %s\n"), disk_device);
if (sun_label || sgi_label)
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;
unsigned int 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_char(_("Expert command (m for help): ")));
switch (c) {
case 'a':
if (sun_label)
sun_set_alt_cyl();
break;
case 'b':
if (dos_label)
move_begin(get_partition(0, partitions));
break;
case 'c':
user_cylinders = cylinders =
read_int(1, cylinders, 1048576, 0,
_("Number of cylinders"));
if (sun_label)
sun_set_ncyl(cylinders);
if (dos_label)
warn_cylinders();
break;
case 'd':
print_raw();
break;
case 'e':
if (sgi_label)
sgi_set_xcyl();
else if (sun_label)
sun_set_xcyl();
else
if (dos_label)
x_list_table(1);
break;
case 'f':
if (dos_label)
fix_partition_table_order();
break;
case 'g':
create_sgilabel();
break;
case 'h':
user_heads = heads = read_int(1, heads, 256, 0,
_("Number of heads"));
update_units();
break;
case 'i':
if (sun_label)
sun_set_ilfact();
if (dos_label)
dos_set_mbr_id();
break;
case 'o':
if (sun_label)
sun_set_rspeed();
break;
case 'p':
if (sun_label)
list_table(1);
else
x_list_table(0);
break;
case 'q':
close(fd);
printf("\n");
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;
fprintf(stderr, _("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 (sun_label)
sun_set_pcylcount();
break;
default:
xmenu();
}
}
}
static int
is_ide_cdrom_or_tape(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
gpt_warning(char *dev)
{
if (dev && gpt_probe_signature_devname(dev))
fprintf(stderr, _("\nWARNING: GPT (GUID Partition Table) detected on '%s'! "
"The util fdisk doesn't support GPT. Use GNU Parted.\n\n"), dev);
}
static void
try(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;
gpt_warning(device);
if ((fd = open(disk_device, type_open)) >= 0) {
gb = get_boot(try_only);
if (gb > 0) { /* I/O error */
} else if (gb < 0) { /* no DOS signature */
list_disk_geometry();
if (!aix_label && !mac_label && btrydev(device) < 0)
fprintf(stderr,
_("Disk %s doesn't contain a valid "
"partition table\n"), device);
} else {
list_table(0);
}
close(fd);
} else {
/* Ignore other errors, since we try IDE
and SCSI hard disks which may not be
installed on the system. */
if (errno == EACCES) {
fprintf(stderr, _("Cannot open %s\n"), device);
return;
}
}
}
/*
* for fdisk -l:
* try all things in /proc/partitions that look like a full disk
*/
static void
tryprocpt(void) {
FILE *procpt;
char line[100], ptname[100], devname[120];
int ma, mi, sz;
procpt = fopen(PROC_PARTITIONS, "r");
if (procpt == NULL) {
fprintf(stderr, _("cannot open %s\n"), PROC_PARTITIONS);
return;
}
while (fgets(line, sizeof(line), procpt)) {
if (sscanf (line, " %d %d %d %[^\n ]",
&ma, &mi, &sz, ptname) != 4)
continue;
snprintf(devname, sizeof(devname), "/dev/%s", ptname);
if (is_probably_full_disk(devname))
try(devname, 0);
}
fclose(procpt);
}
static void
dummy(int *kk) {}
static void
unknown_command(int c) {
printf(_("%c: unknown command\n"), c);
}
int
main(int argc, char **argv) {
int j, c;
int optl = 0, opts = 0;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
/*
* Calls:
* fdisk -v
* fdisk -l [-b sectorsize] [-u] device ...
* fdisk -s [partition] ...
* fdisk [-b sectorsize] [-u] device
*
* Options -C, -H, -S set the geometry.
*
*/
while ((c = getopt(argc, argv, "b:C:H:lsS:uvV")) != -1) {
switch (c) {
case 'b':
/* Ugly: this sector size is really per device,
so cannot be combined with multiple disks,
and te same goes for the C/H/S options.
*/
sector_size = atoi(optarg);
if (sector_size != 512 && sector_size != 1024 &&
sector_size != 2048)
fatal(usage);
sector_offset = 2;
user_set_sector_size = 1;
break;
case 'C':
user_cylinders = atoi(optarg);
break;
case 'H':
user_heads = atoi(optarg);
if (user_heads <= 0 || user_heads >= 256)
user_heads = 0;
break;
case 'S':
user_sectors = atoi(optarg);
if (user_sectors <= 0 || user_sectors >= 64)
user_sectors = 0;
break;
case 'l':
optl = 1;
break;
case 's':
opts = 1;
break;
case 'u':
display_in_cyl_units = 0;
break;
case 'V':
case 'v':
printf("fdisk (%s)\n", PACKAGE_STRING);
exit(0);
default:
fatal(usage);
}
}
#if 0
printf(_("This kernel finds the sector size itself - "
"-b option ignored\n"));
#else
if (user_set_sector_size && argc-optind != 1)
printf(_("Warning: the -b (set sector size) option should"
" be used with one specified device\n"));
#endif
if (optl) {
nowarn = 1;
type_open = O_RDONLY;
if (argc > optind) {
int k;
/* avoid gcc warning:
variable `k' might be clobbered by `longjmp' */
dummy(&k);
listing = 1;
for (k = optind; k < argc; k++)
try(argv[k], 1);
} else {
/* we no longer have default device names */
/* but we can use /proc/partitions instead */
tryprocpt();
}
exit(0);
}
if (opts) {
unsigned long long size;
nowarn = 1;
type_open = O_RDONLY;
opts = argc - optind;