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kernel / pub / scm / utils / util-linux / util-linux / 66ee8158b69525e12060ef558cb5d77feadab1dc / . / fdisk / fdisk.c
blob: 969bf87901269379c764e0ad19d8650b60ffc181 [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.
*
* For detailed old history, see older versions.
* Contributions before 2000 by faith@cs.unc.edu, Michael Bischoff,
* LeBlanc@mcc.ac.uk, martin@cs.unc.edu, leisner@sdsp.mc.xerox.com,
* esr@snark.thyrsus.com, aeb@cwi.nl, quinlan@yggdrasil.com,
* fasten@cs.bonn.edu, orschaer@cip.informatik.uni-erlangen.de,
* jj@sunsite.mff.cuni.cz, fasten@shw.com, ANeuper@GUUG.de,
* kgw@suse.de.
*
* Modified, Sun Feb 20 2000, kalium@gmx.de
* Added fix operation allowing to reorder primary/extended partition
* entries within the partition table. Some programs or OSes have
* problems using a partition table with entries not ordered
* according to their positions on disk.
* Munged this patch to also make it work for logical partitions.
* aeb, 2000-02-20.
*
* Wed Mar 1 14:34:53 EST 2000 David Huggins-Daines <dhuggins@linuxcare.com>
* Better support for OSF/1 disklabels on Alpha.
*
* 2000-04-06, Michal Jaegermann (michal@ellpspace.math.ualberta.ca)
* fixed and added some alpha stuff.
*/
#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 <linux/hdreg.h> /* for HDIO_GETGEO */
#include "nls.h"
#include "common.h"
#include "fdisk.h"
#include "fdisksunlabel.h"
#include "fdisksgilabel.h"
#include "fdiskaixlabel.h"
#include "../defines.h"
#ifdef HAVE_blkpg_h
#include <linux/blkpg.h>
#endif
static void delete_partition(int i);
#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; \
}
/* A valid partition table sector ends in 0x55 0xaa */
static unsigned int
part_table_flag(char *b) {
return ((uint) b[510]) + (((uint) b[511]) << 8);
}
int
valid_part_table_flag(unsigned char *b) {
return (b[510] == 0x55 && b[511] == 0xaa);
}
static void
write_part_table_flag(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(unsigned char *cp) {
return (uint)(cp[0]) + ((uint)(cp[1]) << 8)
+ ((uint)(cp[2]) << 16) + ((uint)(cp[3]) << 24);
}
static void
set_start_sect(struct partition *p, unsigned int start_sect) {
store4_little_endian(p->start4, start_sect);
}
unsigned int
get_start_sect(struct partition *p) {
return read4_little_endian(p->start4);
}
static void
set_nr_sects(struct partition *p, unsigned int nr_sects) {
store4_little_endian(p->size4, nr_sects);
}
unsigned int
get_nr_sects(struct partition *p) {
return read4_little_endian(p->size4);
}
/* 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.
*/
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 */
uint offset; /* disk sector number */
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,
partitions = 4; /* maximum partition + 1 */
uint user_cylinders, user_heads, user_sectors;
uint heads,
sectors,
cylinders,
sector_size = DEFAULT_SECTOR_SIZE,
user_set_sector_size = 0,
sector_offset = 1,
units_per_sector = 1,
display_in_cyl_units = 1,
extended_offset = 0; /* offset of link pointers */
#define dos_label (!sun_label && !sgi_label && !aix_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 disklabel */
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 drives) 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:
sprintf(error, _("Unable to open %s\n"), disk_device);
break;
case unable_to_read:
sprintf(error, _("Unable to read %s\n"), disk_device);
break;
case unable_to_seek:
sprintf(error, _("Unable to seek on %s\n"),disk_device);
break;
case unable_to_write:
sprintf(error, _("Unable to write %s\n"), disk_device);
break;
case ioctl_error:
sprintf(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, uint secno) {
ext2_loff_t offset = (ext2_loff_t) secno * sector_size;
if (ext2_llseek(fd, offset, SEEK_SET) == (ext2_loff_t) -1)
fatal(unable_to_seek);
}
static void
read_sector(int fd, uint secno, char *buf) {
seek_sector(fd, secno);
if (read(fd, buf, sector_size) != sector_size)
fatal(unable_to_read);
}
static void
write_sector(int fd, uint secno, 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, uint offset) {
struct pte *pe = &ptes[pno];
pe->offset = offset;
pe->sectorbuffer = (char *) 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 int
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 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) {
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 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) {
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 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 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"));
}
}
static int
get_sysid(int i) {
return (
sun_label ? sunlabel->infos[i].id :
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)
{
uint 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 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, struct partition *p, uint start, uint stop,
int sysid, uint 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 (!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: deleting partitions after %d\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)) {
printf("omitting empty partition (%d)\n", i+1);
delete_partition(i);
goto remove; /* numbering changed */
}
}
}
static void
create_doslabel(void) {
int i;
fprintf(stderr,
_("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"));
sun_nolabel(); /* otherwise always recognised as sun */
sgi_nolabel(); /* otherwise always recognised as sgi */
write_part_table_flag(MBRbuffer);
for (i = 0; i < 4; i++)
if (ptes[i].part_table)
clear_partition(ptes[i].part_table);
set_all_unchanged();
set_changed(0);
get_boot(create_empty);
}
#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
}
/*
* Ask kernel about geometry. Invent something reasonable
* in case the kernel has no opinion.
*/
void
get_geometry(int fd, struct geom *g) {
int sec_fac;
long longsectors;
struct hd_geometry geometry;
int res1, res2;
get_sectorsize(fd);
sec_fac = sector_size / 512;
guess_device_type(fd);
res1 = ioctl(fd, BLKGETSIZE, &longsectors);
#ifdef HDIO_REQ
res2 = ioctl(fd, HDIO_REQ, &geometry);
#else
res2 = ioctl(fd, HDIO_GETGEO, &geometry);
#endif
/* never use geometry.cylinders - it is truncated */
heads = cylinders = sectors = 0;
sector_offset = 1;
if (res2 == 0) {
heads = geometry.heads;
sectors = geometry.sectors;
if (heads * sectors == 0)
res2 = -1;
else if (dos_compatible_flag)
sector_offset = sectors;
}
if (res1 == 0 && res2 == 0) { /* normal case */
cylinders = longsectors / (heads * sectors);
cylinders /= sec_fac; /* do not round up */
} else if (res1 == 0) { /* size but no geometry */
heads = cylinders = 1;
sectors = longsectors / sec_fac;
}
if (!sectors)
sectors = user_sectors;
if (!heads)
heads = user_heads;
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
*/
int
get_boot(enum action what) {
int i;
partitions = 4;
if (what == create_empty)
goto got_table; /* skip reading disk */
if ((fd = open(disk_device, type_open)) < 0) {
if ((fd = open(disk_device, O_RDONLY)) < 0)
fatal(unable_to_open);
else
printf(_("You will not be able to write the partition table.\n"));
}
get_geometry(fd, NULL);
update_units();
if (sector_size != read(fd, MBRbuffer, sector_size))
fatal(unable_to_read);
got_table:
if (check_sun_label())
return 0;
if (check_sgi_label())
return 0;
if (check_aix_label())
return 0;
if (check_osf_label())
return 0;
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:
break;
}
fprintf(stderr, _("Internal error\n"));
exit(1);
}
warn_cylinders();
warn_geometry();
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);
}
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 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.
*/
uint
read_int(uint low, uint dflt, uint high, uint base, char *mesg)
{
uint i;
int default_ok = 1;
static char *ms = NULL;
static int mslen = 0;
if (!ms || strlen(mesg)+50 > mslen) {
mslen = strlen(mesg)+100;
if (!(ms = realloc(ms,mslen)))
fatal(out_of_memory);
}
if (dflt < low || dflt > high)
default_ok = 0;
if (default_ok)
sprintf(ms, _("%s (%d-%d, default %d): "), mesg, low, high, dflt);
else
sprintf(ms, "%s (%d-%d): ", 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 == '-') {
i = atoi(line_ptr+1);
if (*line_ptr == '-')
i = -i;
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':
case 'K':
i *= 2;
i /= (sector_size / 512);
i /= units_per_sector;
break;
case 'm':
case 'M':
i *= 2048;
i /= (sector_size / 512);
i /= units_per_sector;
break;
case 'g':
case 'G':
i *= 2048000;
i /= (sector_size / 512);
i /= units_per_sector;
break;
default:
break;
}
i += base;
} else {
i = atoi(line_ptr);
while (isdigit(*line_ptr)) {
line_ptr++;
use_default = 0;
}
}
if (use_default)
printf(_("Using default value %d\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 && (
(!sun_label && !sgi_label && !pe->part_table->sys_ind)
|| (sun_label &&
(!sunlabel->partitions[i].num_sectors ||
!sunlabel->infos[i].id))
|| (sgi_label && (!sgi_get_num_sectors(i)))
)) fprintf(stderr, _("Warning: partition %d has empty type\n"), i+1);
return i;
}
char * const
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;
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) {
--partitions;
--i;
clear_partition(ptes[i].ext_pointer);
ptes[i].changed = 1;
} else {
if (i > 4) {
p = ptes[i-1].ext_pointer;
p->boot_ind = 0;
p->head = q->head;
p->sector = q->sector;
p->cyl = q->cyl;
p->sys_ind = EXTENDED;
p->end_head = q->end_head;
p->end_sector = q->end_sector;
p->end_cyl = q->end_cyl;
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 */
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
clear_partition(ptes[i].part_table);
}
}
static void
change_sysid(void) {
char *temp;
int i = get_partition(0, partitions), sys, origsys;
struct partition *p = ptes[i].part_table;
origsys = sys = get_sysid(i);
if (!sys && !sgi_label)
printf(_("Partition %d does not exist yet!\n"), i + 1);
else while (1) {
sys = read_hex (get_sys_types());
if (!sys && !sgi_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 != 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 (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) {
sun_change_sysid(i, sys);
} else
if (sgi_label) {
sgi_change_sysid(i, sys);
} else
p->sys_ind = sys;
printf (_("Changed system type of partition %d "
"to %x (%s)\n"), i + 1, sys,
(temp = partition_type(sys)) ? temp :
_("Unknown"));
ptes[i].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, uint *c, uint *h, uint *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) {
uint pbc, pbh, pbs; /* physical beginning c, h, s */
uint pec, peh, pes; /* physical ending c, h, s */
uint lbc, lbh, lbs; /* logical beginning c, h, s */
uint 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);
printf(_(" phys=(%d, %d, %d) "), pec, peh, pes);
printf(_("should be (%d, %d, %d)\n"),
pec, heads - 1, sectors);
}
}
static void
list_disk_geometry(void) {
printf(_("\nDisk %s: %d heads, %d sectors, %d cylinders\nUnits = "
"%s of %d * %d bytes\n\n"), disk_device, heads, sectors,
cylinders, str_units(PLURAL), 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) {
struct pte *pe;
struct partition *p;
uint 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;
}
static void
fix_partition_table_order(void) {
struct pte *pei, *pek, ptebuf;
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) {
/* partition i should have come earlier, move it */
pei = &ptes[i];
pek = &ptes[k];
if (i < 4) {
/* We have to move data in the MBR */
struct partition *pi, *pk, *pe, pbuf;
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));
} else {
/* Only change is change in numbering */
ptebuf = *pei;
*pei = *pek;
*pek = ptebuf;
}
pei->changed = pek->changed = 1;
}
}
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;
}
/* 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 && p->sys_ind) {
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 %9ld %9ld %9ld%c %2x %s\n",
partname(disk_device, i+1, w+2),
/* boot flag */ !p->boot_ind ? ' ' : p->boot_ind == ACTIVE_FLAG
? '*' : '?',
/* start */ (long) cround(get_partition_start(pe)),
/* end */ (long) cround(get_partition_start(pe) + psects
- (psects ? 1 : 0)),
/* odd flag on end */ (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, %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%9d%9d %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);
}
}
}
static void
fill_bounds(uint *first, uint *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, uint h, uint s, uint c, uint start) {
uint 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 %d\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;
uint total = 1;
uint first[partitions], last[partitions];
struct partition *p = part_table[0];
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];
uint 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, read = 0;
struct partition *p = ptes[n].part_table;
struct partition *q = ptes[ext_index].part_table;
uint 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;
limit = heads * sectors * cylinders - 1;
if (extended_offset) {
first[ext_index] = extended_offset;
last[ext_index] = get_start_sect(q) +
get_nr_sects(q) - 1;
}
} else {
start = extended_offset + sector_offset;
limit = get_start_sect(q) + get_nr_sects(q) - 1;
}
if (display_in_cyl_units)
for (i = 0; i < partitions; i++)
first[i] = (cround(first[i]) - 1) * units_per_sector;
sprintf(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 %d is already allocated\n"), temp);
temp = start;
read = 0;
}
if (!read && start == temp) {
uint i;
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 {
sprintf(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, p, start, stop, sys, ptes[n].offset);
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;
} else {
if (n > 4)
set_partition(n - 1, ptes[n-1].ext_pointer,
ptes[n].offset, stop, EXTENDED,
extended_offset);
#if 0
if ((limit = get_nr_sects(p)) & 1)
printf(_("Warning: partition %d has an odd "
"number of sectors.\n"), n + 1);
#endif
}
}
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 (partitions >= MAXIMUM_PARTS) {
printf(_("The maximum number of partitions has been created\n"));
return;
}
for (i = 0; i < 4; i++)
free_primary += !ptes[i].part_table->sys_ind;
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];
sprintf(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') {
add_partition(get_partition(0, 4),
LINUX_NATIVE);
return;
}
else if (c == 'l' && extended_offset) {
add_logical();
return;
}
else if (c == 'e' && !extended_offset) {
add_partition(get_partition(0, 4),
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 < 0)
printf(_("Re-read table failed with error %d: %s.\nReboot your "
"system to ensure the partition table is updated.\n"),
error, strerror(error));
if (!sun_label && !sgi_label)
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) {
close(fd);
printf(_("Syncing disks.\n"));
sync();
sleep(4); /* for sync() */
exit(!!i);
}
}
#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) {
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;
uint 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, 131071, 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();
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(char *device) {
/* 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. */
FILE *procf;
char buf[100];
struct stat statbuf;
if (strncmp("/dev/hd", device, 7))
return 0;
sprintf(buf, "/proc/ide/%s/media", device+5);
procf = fopen(buf, "r");
if (procf != NULL && fgets(buf, sizeof(buf), procf))
return !strncmp(buf, "cdrom", 5);
/* Now when this proc file does not exist, skip the
device when it is read-only. */
if (stat(device, &statbuf) == 0)
return (statbuf.st_mode & 0222) == 0;
return 0;
}
static void
try(char *device, int user_specified) {
disk_device = device;
if (!setjmp(listingbuf)) {
if (!user_specified)
if (is_ide_cdrom(device))
return;
if ((fd = open(disk_device, type_open)) >= 0) {
if (get_boot(try_only) < 0) {
list_disk_geometry();
if (aix_label)
return;
if (btrydev(device) < 0)
fprintf(stderr,
_("Disk %s doesn't contain a valid "
"partition table\n"), device);
close(fd);
} else {
close(fd);
list_table(0);
if (!sun_label && partitions > 4)
delete_partition(ext_index);
}
} 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 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(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]\n",
&ma, &mi, &sz, ptname) != 4)
continue;
for(s = ptname; *s; s++);
if (isdigit(s[-1]))
continue;
sprintf(devname, "/dev/%s", ptname);
try(devname, 0);
}
}
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
*/
while ((c = getopt(argc, argv, "b:lsuvV")) != EOF) {
switch (c) {
case 'b':
/* ugly: this sector size is really per device,
so cannot be combined with multiple disks */
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 'l':
optl = 1;
break;
case 's':
opts = 1;
break;
case 'u':
display_in_cyl_units = 0;
break;
case 'V':
case 'v':
printf("fdisk v" UTIL_LINUX_VERSION "\n");
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) {
long size;
nowarn = 1;
type_open = O_RDONLY;
opts = argc - optind;
if (opts <= 0)
fatal(usage);
for (j = optind; j < argc; j++) {
disk_device = argv[j];
if ((fd = open(disk_device, type_open)) < 0)
fatal(unable_to_open);
if (ioctl(fd, BLKGETSIZE, &size))
fatal(ioctl_error);
close(fd);
if (opts == 1)
printf("%ld\n", size/2);
else
printf("%s: %ld\n", argv[j], size/2);
}
exit(0);
}
if (argc-optind == 1)
disk_device = argv[optind];
else if (argc-optind != 0)
fatal(usage);
else
fatal(usage2);
get_boot(fdisk);
if (aix_label)
exit(0);
#ifdef __alpha__
/* On alpha, if we detect a disklabel, go directly to
disklabel mode (typically you'll be switching from DOS
partition tables to disklabels, not the other way around)
- dhuggins@linuxcare.com */
if (osf_label) {
printf(_("Detected an OSF/1 disklabel on %s, entering disklabel mode.\n"
"To return to DOS partition table mode, use the 'r' command.\n"),
disk_device);
bselect();
}
#endif
while (1) {
putchar('\n');
c = tolower(read_char(_("Command (m for help): ")));
switch (c) {
case 'a':
if (dos_label)
toggle_active(get_partition(1, partitions));
else if (sun_label)
toggle_sunflags(get_partition(1, partitions),
0x01);
else if (sgi_label)
sgi_set_bootpartition(
get_partition(1, partitions));
else
unknown_command(c);
break;
case 'b':
if (sgi_label) {
printf(_("\nThe current boot file is: %s\n"),
sgi_get_bootfile());
if (read_chars(_("Please enter the name of the "
"new boot file: ")) == '\n')
printf(_("Boot file unchanged\n"));
else
sgi_set_bootfile(line_ptr);
} else
bselect();
break;
case 'c':
if (dos_label)
toggle_dos_compatibility_flag();
else if (sun_label)
toggle_sunflags(get_partition(1, partitions),
0x10);
else if (sgi_label)
sgi_set_swappartition(
get_partition(1, partitions));
else
unknown_command(c);
break;
case 'd':
delete_partition(
get_partition(1, partitions));
break;
case 'i':
if (sgi_label)
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);
printf("\n");
exit(0);
case 's':
create_sunlabel();
break;
case 't':
change_sysid();
break;
case 'u':
change_units();
break;
case 'v':
verify();
break;
case 'w':
write_table(); /* does not return */
break;
case 'x':
if(sgi_label) {
fprintf(stderr,
_("\n\tSorry, no experts menu for SGI "
"partition tables available.\n\n"));
} else
xselect();
break;
default:
unknown_command(c);
menu();
}
}
return 0;
}