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- /* 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.
- *
- * Before Linux version 0.95c, this program requires a kernel patch.
- *
- * Modified, Tue Feb 2 18:46:49 1993, faith@cs.unc.edu to better support SCSI.
- * Modified, Sat Feb 27 18:11:27 1993, faith@cs.unc.edu: added extfs support.
- * Modified, Sat Mar 6 10:14:12 1993, faith@cs.unc.edu: added more comments.
- * Modified, Sat Mar 6 12:25:45 1993, faith@cs.unc.edu:
- * Added patches from Michael Bischoff (i1041905@ws.rz.tu-bs.de
- * or mbi@mo.math.nat.tu-bs.de) to fix the following problems:
- * 1) Incorrect mapping of head/sector/cylinder to absolute sector
- * 2) Odd sector count causes one sector to be lost
- * Modified, Sat Mar 6 12:25:52 1993, faith@cs.unc.edu: improved verification.
- * Modified, Sat Apr 17 15:00:00 1993, LeBlanc@mcc.ac.uk: add -s, fix -l.
- * Modified, Sat Apr 24 10:00:00 1993, LeBlanc@mcc.ac.uk: fix overlap bug.
- * Modified, Wed May 5 21:30:00 1993, LeBlanc@mcc.ac.uk: errors to stderr.
- * Modified, Mon Mar 21 20:00:00 1994, LeBlanc@mcc.ac.uk:
- * more stderr for messages, avoid division by 0, and
- * give reboot message only if ioctl(fd, BLKRRPART) fails.
- * Modified, Mon Apr 25 01:01:05 1994, martin@cs.unc.edu:
- * 1) Added support for DOS, OS/2, ... compatibility. We should be able
- * use this fdisk to partition our drives for other operating systems.
- * 2) Added a print the raw data in the partition table command.
- * Modified, Wed Jun 22 21:05:30 1994, faith@cs.unc.edu:
- * Added/changed a few partition type names to conform to cfdisk.
- * (suggested by Sujal, smpatel@wam.umd.edu)
- */
-
-
- #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 <sys/ioctl.h>
-
- #include <linux/genhd.h>
- #include <linux/hdreg.h>
- #include <linux/fs.h>
-
- #if defined(__GNUC__) || defined(HAS_LONG_LONG)
- typedef long long ext2_loff_t;
- #else
- typedef long ext2_loff_t;
- #endif
-
- extern ext2_loff_t ext2_llseek(unsigned int fd,
- ext2_loff_t offset,
- unsigned int origin);
-
- #define hex_val(c) ({ \
- char _c = (c); \
- isdigit(_c) ? _c - '0' : \
- tolower(_c) + 10 - 'a'; \
- })
-
-
- #define VERSION "2.0 (>2GB)"
-
- #define DEFAULT_DEVICE "/dev/hda"
- #define ALTERNATE_DEVICE "/dev/sda"
- #define LINE_LENGTH 80
- #define MAXIMUM_PARTS 60
- #define SECTOR_SIZE 512
- #define PART_TABLE_FLAG 0xaa55
- #define table_check(b) ((unsigned short *)((b) + 0x1fe))
- #define 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 calculate(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; \
- }
-
- #define cround(n) (((n) + display_factor * unit_flag) / display_factor)
- #define ACTIVE_FLAG 0x80
- #define EXTENDED 5
-
- #define LINUX_PARTITION 0x81
- #define LINUX_SWAP 0x82
- #define LINUX_NATIVE 0x83
-
- enum failure {usage, unable_to_open, unable_to_read, unable_to_seek,
- unable_to_write, out_of_memory};
-
- char *disk_device = DEFAULT_DEVICE, /* hda, unless specified */
- *line_ptr, /* interactive input */
- line_buffer[LINE_LENGTH],
- changed[MAXIMUM_PARTS], /* marks changed buffers */
- buffer[SECTOR_SIZE], /* first four partitions */
- *buffers[MAXIMUM_PARTS] /* pointers to buffers */
- = {buffer, buffer, buffer, buffer};
-
- int fd, /* the disk */
- ext_index, /* the prime extended partition */
- listing = 0, /* no aborts for fdisk -l */
- size_flag = 0,
- dos_compatible_flag = ~0,
- partitions = 4; /* maximum partition + 1 */
-
- uint heads,
- sectors,
- cylinders,
- sector_offset = 1,
- display_factor = 1, /* in units/sector */
- unit_flag = 1,
- full_bits = 0, /* 1024 cylinders in sectors */
- extended_offset = 0, /* offset of link pointers */
- offsets[MAXIMUM_PARTS] = {0, 0, 0, 0};
-
- struct partition *part_table[MAXIMUM_PARTS] /* partitions */
- = {offset(buffer, 0), offset(buffer, 1),
- offset(buffer, 2), offset(buffer, 3)},
- *ext_pointers[MAXIMUM_PARTS] /* link pointers */
- = {NULL, NULL, NULL, NULL};
-
- struct systypes {
- unsigned char index;
- char *name;
- } sys_types[] = {
- {0, "Empty"},
- {1, "DOS 12-bit FAT"},
- {2, "XENIX root"},
- {3, "XENIX usr"},
- {4, "DOS 16-bit <32M"},
- {EXTENDED, "Extended"},
- {6, "DOS 16-bit >=32M"},
- {7, "OS/2 HPFS"}, /* or QNX? */
- {8, "AIX"},
- {9, "AIX bootable"},
- {10, "OS/2 Boot Manager"},
- {0x40, "Venix 80286"},
- {0x51, "Novell?"},
- {0x52, "Microport"}, /* or CPM? */
- {0x63, "GNU HURD"}, /* or System V/386? */
- {0x64, "Novell"},
- {0x75, "PC/IX"},
- {0x80, "Old MINIX"}, /* Minix 1.4a and earlier */
-
- {LINUX_PARTITION, "Linux/MINIX"}, /* Minix 1.4b and later */
- {LINUX_SWAP, "Linux swap"},
- {LINUX_NATIVE, "Linux native"},
-
- {0x93, "Amoeba"},
- {0x94, "Amoeba BBT"}, /* (bad block table) */
- {0xa5, "BSD/386"},
- {0xb7, "BSDI fs"},
- {0xb8, "BSDI swap"},
- {0xc7, "Syrinx"},
- {0xdb, "CP/M"}, /* or Concurrent DOS? */
- {0xe1, "DOS access"},
- {0xe3, "DOS R/O"},
- {0xf2, "DOS secondary"},
- {0xff, "BBT"} /* (bad track table) */
- };
-
- 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 [-l] [-v] [-s /dev/hdxn] [/dev/hdx]\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 out_of_memory:
- message = "Unable to allocate any more memory\n";
- break;
- default: message = "Fatal error\n";
- }
-
- if ( listing != 1 ) {
- fputc('\n', stderr);
- fputs(message, stderr);
- }
- exit(1);
- }
-
- void menu(void)
- {
- puts("Command action\n"
- " a toggle a bootable flag\n"
- " c toggle the dos compatiblity flag\n"
- " d delete a partition\n"
- " l list known partition types\n"
- " m print this menu\n"
- " n add a new partition\n"
- " p print the partition table\n"
- " q quit without saving changes\n"
- " t change a partition's system id\n"
- " u change display/entry units\n"
- " v verify the partition table\n"
- " w write table to disk and exit\n"
- " x extra functionality (experts only)"
- );
- }
-
- void xmenu(void)
- {
- puts("Command action\n"
- " b move beginning of data in a partition\n"
- " c change number of cylinders\n"
- " d print the raw data in the partition table\n"
- " e list extended partitions\n"
- " h change number of heads\n"
- " m print this menu\n"
- " p print the partition table\n"
- " q quit without saving changes\n"
- " r return to main menu\n"
- " s change number of sectors\n"
- " w write table to disk and exit"
- );
- }
-
- char *partition_type(unsigned char type)
- {
- int high = sizeof(sys_types) / sizeof(struct systypes),
- low = 0, mid;
- uint tmp;
-
- while (high >= low) {
- mid = (high + low) >> 1;
- if ((tmp = sys_types[mid].index) == type)
- return sys_types[mid].name;
- else if (tmp < type)
- low = mid + 1;
- else high = mid - 1;
- }
- return NULL;
- }
-
- void list_types(void)
- {
- uint last[4], done = 0, next = 0,
- size = sizeof(sys_types) / sizeof(struct systypes);
- int 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_types[next].index, sys_types[next].name);
- next = last[i++] + done;
- if (i > 3 || next >= last[i]) {
- i = 0;
- next = ++done;
- }
- } while (done < last[0]);
- putchar('\n');
- }
-
- void clear_partition(struct partition *p)
- {
- 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;
- p->start_sect = 0;
- p->nr_sects = 0;
- }
-
- void set_partition(int i, struct partition *p, uint start, uint stop,
- int sys, uint offset)
- {
- p->boot_ind = 0;
- p->sys_ind = sys;
- p->start_sect = start - offset;
- p->nr_sects = 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);
- changed[i] = 1;
- }
-
- int test_c(char **m, char *mesg)
- {
- int val = 0;
- if (!*m)
- if ( listing != 1 ) {
- fprintf(stderr, "You must set");
- }
- else {
- if ( listing != 1 ) {
- fprintf(stderr, " %s", *m);
- }
- val = 1;
- }
- *m = mesg;
- return val;
- }
-
- 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;
- if ( listing != 1 ) {
- fprintf(stderr,
- "%s%s.\nYou can do this from the extra functions menu.\n",
- prev ? " and " : " ", m);
- }
- return 1;
- }
-
- uint rounded(uint calcul, uint start)
- {
- uint i;
- if (!full_bits)
- return calcul;
- while ((i = calcul + full_bits) <= start)
- calcul = i;
- return calcul;
- }
-
- void update_units(void)
- {
- full_bits = 1024 * heads * sectors;
- if (unit_flag && full_bits)
- display_factor = full_bits >> 10;
- else display_factor = 1;
- }
-
- void warn_cylinders(void)
- {
- update_units();
- if (cylinders > 1024)
- if ( listing != 1 ) {
- fprintf(stderr, "The number of cylinders for this disk is "
- "set to %d.\nThis is larger than 1024, and may cause "
- "problems with:\n"
- "1) software that runs at boot time (e.g., LILO)\n"
- "2) booting and partitioning software form other OSs\n"
- " (e.g., DOS FDISK, OS/2 FDISK)\n",
- cylinders);
- }
- }
-
- void read_extended(struct partition *p)
- {
- int i;
- struct partition *q;
-
- ext_pointers[ext_index] = part_table[ext_index];
- if (!p->start_sect)
- if ( listing != 1 ) {
- fprintf(stderr, "Bad offset in primary extended partition\n");
- }
- else while (p->sys_ind == EXTENDED) {
- if (partitions >= MAXIMUM_PARTS) {
- if ( listing != 1 ) {
- fprintf(stderr,
- "Warning: deleting partitions after %d\n",
- partitions);
- }
- clear_partition(ext_pointers[partitions - 1]);
- changed[partitions - 1] = 1;
- return;
- }
- offsets[partitions] = extended_offset + p->start_sect;
- if (!extended_offset)
- extended_offset = p->start_sect;
- if (ext2_llseek(fd, offsets[partitions]
- * SECTOR_SIZE, SEEK_SET) < 0)
- fatal(unable_to_seek);
- if (!(buffers[partitions] = (char *) malloc(SECTOR_SIZE)))
- fatal(out_of_memory);
- if (SECTOR_SIZE != read(fd, buffers[partitions], SECTOR_SIZE))
- fatal(unable_to_read);
- part_table[partitions] = ext_pointers[partitions] = NULL;
- q = p = offset(buffers[partitions], 0);
- for (i = 0; i < 4; i++, p++) {
- if (p->sys_ind == EXTENDED)
- if (ext_pointers[partitions])
- fprintf(stderr, "Warning: extra link "
- "pointer in partition table "
- "%d\n", partitions + 1);
- else
- ext_pointers[partitions] = p;
- else if (p->sys_ind)
- if (!part_table[partitions])
- part_table[partitions] = p;
- }
- if (!part_table[partitions])
- if (q != ext_pointers[partitions])
- part_table[partitions] = q;
- else part_table[partitions] = q + 1;
- if (!ext_pointers[partitions])
- if (q != part_table[partitions])
- ext_pointers[partitions] = q;
- else ext_pointers[partitions] = q + 1;
- p = ext_pointers[partitions++];
- }
- }
-
- void get_boot(void)
- {
- int i;
- struct hd_geometry geometry;
-
- partitions = 4;
- if ((fd = open(disk_device, O_RDWR)) < 0)
- fatal(unable_to_open);
- if (SECTOR_SIZE != read(fd, buffer, SECTOR_SIZE))
- fatal(unable_to_read);
- if (!ioctl(fd, HDIO_REQ, &geometry)) {
- heads = geometry.heads;
- sectors = geometry.sectors;
- cylinders = geometry.cylinders;
- if (dos_compatible_flag)
- sector_offset = sectors;
- warn_cylinders();
- }
- else update_units();
- warn_geometry();
-
- for (i = 0; i < 4; i++)
- if(part_table[i]->sys_ind == EXTENDED)
- if (partitions != 4)
- fprintf(stderr, "Ignoring extra extended "
- "partition %d\n", i + 1);
- else read_extended(part_table[ext_index = i]);
-
- for (i = 3; i < partitions; i++)
- if (*table_check(buffers[i]) != PART_TABLE_FLAG) {
- if ( listing != 1 ) {
- fprintf(stderr, "Warning: invalid flag %04x of parti"
- "tion table %d will be corrected by w(rite)\n",
- *table_check(buffers[i]), i + 1);
- }
- changed[i] = 1;
- }
- }
-
- int read_line(void)
- {
- if (!fgets(line_buffer, LINE_LENGTH, stdin))
- return 0;
- line_ptr = line_buffer;
- while (*line_ptr && !isgraph(*line_ptr))
- line_ptr++;
- return *line_ptr;
- }
-
- char read_char(char *mesg)
- {
- do
- fputs(mesg, stdout);
- while (!read_line());
- return *line_ptr;
- }
-
- uint read_int(uint low, uint high, char *mesg)
- {
- uint i;
- char ms[70];
- sprintf(ms, "%s (%d-%d): ", mesg, low, high);
-
- while (1) {
- while (!isdigit(read_char(ms)) &&
- (!size_flag || *line_ptr != '+'));
- if (*line_ptr == '+') {
- i = atoi(++line_ptr);
- while (isdigit(*line_ptr))
- line_ptr++;
- switch (*line_ptr) {
- case 'c':
- case 'C': if (!unit_flag)
- i *= heads * sectors;
- break;
- case 'k':
- case 'K': i *= 2;
- i /= display_factor;
- break;
- case 'm':
- case 'M': i *= 2048;
- i /= display_factor;
- break;
- default: break;
- }
- i += low;
- }
- else i = atoi(line_ptr);
- if (i >= low && i <= high)
- break;
- }
- size_flag = 0;
- return i;
- }
-
- int get_partition(int warn, int max)
- {
- int i = read_int(1, max, "Partition number") - 1;
-
- if (warn && !part_table[i]->sys_ind)
- if ( listing != 1 ) {
- fprintf(stderr, "Warning: partition %d has empty type\n",
- i + 1);
- }
- return i;
- }
-
- char *const str_units(void)
- {
- return unit_flag ? "cylinder" : "sector";
- }
-
- void change_units(void)
- {
- if (unit_flag = !unit_flag)
- display_factor = 1;
- else display_factor = heads * sectors;
- update_units();
- printf("Changing display/entry units to %ss\n",
- str_units());
- }
-
- void toggle_active(int i)
- {
- struct partition *p = part_table[i];
-
- if (p->sys_ind == EXTENDED && !p->boot_ind)
- fprintf(stderr,
- "WARNING: Partition %d is an extended partition\n",
- i + 1);
- if (p->boot_ind)
- p->boot_ind = 0;
- else p->boot_ind = ACTIVE_FLAG;
- changed[i] = 1;
- }
-
- void toggle_dos(void)
- {
- dos_compatible_flag = ~dos_compatible_flag;
- printf("DOS Compatibility flag is ");
- if (dos_compatible_flag)
- sector_offset = sectors;
- else {
- sector_offset = 1;
- printf("not ");
- }
- printf("set\n");
- }
-
- void delete_partition(int i)
- {
- struct partition *p = part_table[i], *q = ext_pointers[i];
-
- /* Note that for the fifth partition (i == 4) we don't actually
- * decrement partitions.
- */
-
- if (warn_geometry())
- return;
- changed[i] = 1;
- if (i < 4) {
- if (p->sys_ind == EXTENDED && i == ext_index) {
- while (partitions > 4)
- free(buffers[--partitions]);
- ext_pointers[ext_index] = NULL;
- extended_offset = 0;
- }
- clear_partition(p);
- }
- else if (!q->sys_ind && i > 4) {
- free(buffers[--partitions]);
- clear_partition(ext_pointers[--i]);
- }
- else if (i > 3) {
- if (i > 4) {
- p = ext_pointers[i - 1];
- 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;
- p->start_sect = q->start_sect;
- p->nr_sects = q->nr_sects;
- changed[i - 1] = 1;
- }
- else {
- part_table[5]->start_sect +=
- offsets[5] - extended_offset;
- offsets[5] = extended_offset;
- changed[5] = 1;
- }
- if (partitions > 5) {
- partitions--;
- free(buffers[i]);
- while (i < partitions) {
- changed[i] = changed[i + 1];
- buffers[i] = buffers[i + 1];
- offsets[i] = offsets[i + 1];
- part_table[i] = part_table[i + 1];
- ext_pointers[i] = ext_pointers[i + 1];
- i++;
- }
- }
- else
- clear_partition(part_table[i]);
- }
- }
-
- void change_sysid(void)
- {
- char *temp;
- int i = get_partition(0, partitions), sys;
- struct partition *p = part_table[i];
-
- if ((sys = p->sys_ind) == EXTENDED)
- printf("Partition %d is extended. Delete it\n", i + 1);
- else if (!sys)
- printf("Partition %d does not exist yet!\n", i + 1);
- else while (1) {
- read_char("Hex code (type L to list codes): ");
- if (tolower(*line_ptr) == 'l')
- list_types();
- else if (isxdigit(*line_ptr)) {
- sys = 0;
- do
- sys = sys << 4 | hex_val(*line_ptr++);
- while (isxdigit(*line_ptr));
- if (!sys) {
- delete_partition(i);
- break;
- }
- else if (sys == EXTENDED) {
- printf("You may not change a partition "
- "to be an extended partition\n");
- break;
- }
- else if (sys < 256) {
- if (sys == p->sys_ind)
- break;
- part_table[i]->sys_ind = sys;
- printf ("Changed system type of partition %d "
- "to %x (%s)\n", i + 1, sys,
- (temp = partition_type(sys)) ? temp :
- "Unknown");
- changed[i] = 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(p->start_sect, &lbc, &lbh, &lbs);
-
- /* compute logical ending (c, h, s) */
- long2chs(p->start_sect + p->nr_sects - 1, &lec, &leh, &les);
-
- /* Same physical / logical beginning? */
- if (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 (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);
- }
-
- /* 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);
- }
-
- /* 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);
- }
- }
-
- void list_table(void)
- {
- struct partition *p;
- char *type;
- int i, w = strlen(disk_device);
-
- printf("\nDisk %s: %d heads, %d sectors, %d cylinders\nUnits = "
- "%ss of %d * 512 bytes\n\n", disk_device, heads, sectors,
- cylinders, str_units(), display_factor);
- if (w < 5)
- w = 5;
- printf("%*s Boot Begin Start End Blocks Id System\n",
- w + 1, "Device");
- for (i = 0 ; i < partitions; i++)
- if ((p = part_table[i])->sys_ind) {
- printf("%*s%-2d %c%8d%8d%8d%8d%c %2x %s\n", w,
- disk_device, i + 1,
- !p->boot_ind ? ' ' : p->boot_ind == ACTIVE_FLAG
- ? '*' : '?',
- cround(rounded( calculate(p->head, p->sector, p->cyl),
- p->start_sect + offsets[i])),
- cround(p->start_sect + offsets[i]),
- cround(p->start_sect + offsets[i] + p->nr_sects
- - (p->nr_sects ? 1: 0)),
- p->nr_sects / 2, p->nr_sects & 1 ? '+' : ' ',
- p->sys_ind,
- (type = partition_type(p->sys_ind)) ?
- type : "Unknown");
- check_consistency(p, i);
- }
-
- }
-
- void x_list_table(int extend)
- {
- struct partition *p, **q;
- int i;
-
- if (extend)
- q = ext_pointers;
- else
- q = part_table;
- 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++)
- if (p = q[i]) {
- printf("%2d %02x%4d%4d%5d%4d%4d%5d%8d%8d %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),
- p->start_sect, p->nr_sects, p->sys_ind);
- if (p->sys_ind)
- check_consistency(p, i);
- }
- }
-
- void check_bounds(uint *first, uint *last)
- {
- int i;
- uint max = 256 * 63 * 1024;
- struct partition *p = part_table[0];
-
- for (i = 0; i < partitions; p = part_table[++i])
- if (!p->sys_ind || p->sys_ind == EXTENDED) {
- first[i] = max;
- last[i] = 0;
- }
- else {
- first[i] = rounded(calculate(p->head, p->sector,
- p->cyl), p->start_sect + offsets[i]);
- last[i] = p->start_sect + offsets[i] + p->nr_sects - 1;
- }
- }
-
- void check(int n, uint h, uint s, uint c, uint start)
- {
- uint total, real_s, real_c, i;
-
- real_s = sector(s) - 1;
- real_c = cylinder(s, c);
- total = (real_c * sectors + real_s) * heads + h;
- if (full_bits)
- while ((i = total + full_bits) <= start) {
- real_c += 1024;
- total = i;
- }
- 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 (start != total)
- fprintf(stderr,
- "Partition %d: previous sectors %d disagrees with "
- "total %d\n", n, start, total);
- }
-
-
- void verify(void)
- {
- int i, j;
- uint total = 1,
- first[partitions], last[partitions];
- struct partition *p = part_table[0];
-
- if (warn_geometry())
- return;
-
- check_bounds(first, last);
- for (i = 0; i < partitions; p = part_table[++i])
- if (p->sys_ind && (p->sys_ind != EXTENDED)) {
- check_consistency(p, i);
- if (p->start_sect + offsets[i] < 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) {
- uint e_last = part_table[ext_index]->start_sect +
- part_table[ext_index]->nr_sects - 1;
-
- for (p = part_table[i = 4]; i < partitions;
- p = part_table[++i]) {
- total++;
- 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)
- printf("%d unallocated sectors\n", total);
- }
-
- void add_partition(int n, int sys)
- {
- char mesg[48];
- int i, read = 0;
- struct partition *p = part_table[n], *q = part_table[ext_index];
- uint start, stop = 0, limit, temp,
- first[partitions], last[partitions];
-
- if (p->sys_ind) {
- printf("Partition %d is already defined. Delete "
- "it before re-adding it.\n", n + 1);
- return;
- }
- check_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] = q->start_sect + q->nr_sects - 1;
- }
- }
- else {
- start = extended_offset + sector_offset;
- limit = q->start_sect + q->nr_sects - 1;
- }
- if (unit_flag)
- for (i = 0; i < partitions; i++)
- first[i] = (cround(first[i]) - 1) * display_factor;
-
- sprintf(mesg, "First %s", str_units());
- do {
- temp = start;
- for (i = 0; i < partitions; i++) {
- if (start == offsets[i])
- start += sector_offset;
- if (start >= first[i] && start <= last[i])
- if (n < 4)
- start = last[i] + 1;
- else
- start = last[i] + sector_offset;
- }
- if (start > limit)
- break;
- if (start != temp && read) {
- printf("Sector %d is already allocated\n", temp);
- temp = start = stop;
- read = 0;
- }
- if (!read && start == temp) {
- uint i;
- temp = 0;
- start = read_int(cround(i = (stop = start) + (n > 4)),
- cround(limit), mesg);
- if (unit_flag) {
- start = (start - 1) * display_factor;
- if (start < i) start = i;
- }
- read = 1;
- }
- } while (start != temp || !read);
- if (n > 4) /* NOT for fifth partition */
- offsets[n] = start - sector_offset;
-
- for (i = 0; i < partitions; i++) {
- if (start < offsets[i] && limit >= offsets[i])
- limit = offsets[i] - 1;
- if (start < first[i] && limit >= first[i])
- limit = first[i] - 1;
- }
- if (start > limit) {
- printf("No free sectors available\n");
- if (n > 4) {
- free(buffers[n]);
- partitions--;
- }
- return;
- }
- if (cround(start) == cround(limit))
- stop = start;
- else {
- sprintf(mesg, "Last %s or +size or +sizeM or +sizeK",
- str_units());
- size_flag = 1;
- stop = read_int(cround(start), cround(limit), mesg);
- if (unit_flag) {
- stop = stop * display_factor - 1;
- if (stop >limit)
- stop = limit;
- }
- }
-
- set_partition(n, p, start, stop, sys, offsets[n]);
-
- if (sys == EXTENDED) {
- ext_index = n;
- offsets[4] = extended_offset = start;
- ext_pointers[n] = p;
- if (!(buffers[4] = calloc(1, SECTOR_SIZE)))
- fatal(out_of_memory);
- part_table[4] = offset(buffers[4], 0);
- ext_pointers[4] = part_table[4] + 1;
- changed[4] = 1;
- partitions = 5;
- }
- else {
- if (n > 4)
- set_partition(n - 1, ext_pointers[n - 1],
- start - sector_offset, stop, EXTENDED,
- extended_offset);
- #if 0
- if ((limit = p->nr_sects) & 1)
- printf("Warning: partition %d has an odd "
- "number of sectors.\n", n + 1);
- #endif
- }
- }
-
- void add_logical(void)
- {
- if (partitions > 5 || part_table[4]->sys_ind) {
- if (!(buffers[partitions] = calloc(1, SECTOR_SIZE)))
- fatal(out_of_memory);
- part_table[partitions] = offset(buffers[partitions], 0);
- ext_pointers[partitions] = part_table[partitions] + 1;
- offsets[partitions] = 0;
- partitions++;
- }
- add_partition(partitions - 1, LINUX_NATIVE);
- }
-
- void new_partition(void)
- {
- int i, free_primary = 0;
-
- if (warn_geometry())
- return;
- if (partitions >= MAXIMUM_PARTS) {
- printf("The maximum number of partitions has been created\n");
- return;
- }
-
- for (i = 0; i < 4; i++)
- free_primary += !part_table[i]->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;
- }
- }
- }
-
- void write_table(void)
- {
- int i, error = 0;
-
- changed[3] = changed[0] || changed[1] || changed[2] || changed[3];
- for (i = 3; i < partitions; i++)
- if (changed[i]) {
- *table_check(buffers[i]) = PART_TABLE_FLAG;
- if (ext2_llseek(fd, offsets[i]
- * SECTOR_SIZE, SEEK_SET) < 0)
- fatal(unable_to_seek);
- if (write(fd, buffers[i], SECTOR_SIZE) != SECTOR_SIZE)
- fatal(unable_to_write);
- }
-
- printf("The partition table has been altered!\n\n");
-
- printf("Calling ioctl() to re-read partition table.\n"
- "(Reboot to ensure the partition table has been updated.)\n");
- sync();
- sleep(2);
- if (i = ioctl(fd, BLKRRPART))
- error = errno;
- close(fd);
-
- printf("Syncing disks.\n");
- sync();
- sleep(4); /* for sync() */
-
- if (i)
- printf("Re-read table failed with error %d: %s.\nReboot your "
- "system to ensure the partition table is updated.\n",
- error, strerror(error));
-
- 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" );
-
- exit(0);
- }
-
- #define MAX_PER_LINE 16
- void print_buffer(char buffer[])
- {
- int i,
- l;
-
- for (i = 0, l = 0; i < SECTOR_SIZE; i++, l++) {
- if (l == 0)
- printf("0x%03X:", i);
- printf(" %02X", (unsigned char) buffer[i]);
- if (l == MAX_PER_LINE - 1) {
- printf("\n");
- l = -1;
- }
- }
- if (l > 0)
- printf("\n");
- printf("\n");
- }
-
- void print_raw(void)
- {
- int i;
-
- printf("Device: %s\n", disk_device);
- for (i = 3; i < partitions; i++)
- print_buffer(buffers[i]);
- }
-
- void move_begin(int i)
- {
- struct partition *p = part_table[i];
- uint new, first;
-
- if (warn_geometry())
- return;
- if (!p->sys_ind || !p->nr_sects || p->sys_ind == EXTENDED) {
- printf("Partition %d has no data area\n", i + 1);
- return;
- }
- first = rounded(calculate(p->head, p->sector, p->cyl), p->start_sect +
- offsets[i]);
- new = read_int(first, p->start_sect + p->nr_sects + offsets[i] - 1,
- "New beginning of data") - offsets[i];
-
- if (new != p->nr_sects) {
- first = p->nr_sects + p->start_sect - new;
- p->nr_sects = first;
- p->start_sect = new;
- changed[i] = 1;
- }
- }
-
- void xselect(void)
- {
- while(1) {
- putchar('\n');
- switch (tolower(read_char("Expert command (m for help): "))) {
- case 'b': move_begin(get_partition(0, partitions));
- break;
- case 'c': cylinders = read_int(1, 65535,
- "Number of cylinders");
- warn_cylinders();
- break;
- case 'd': print_raw();
- break;
- case 'e': x_list_table(1);
- break;
- case 'h': heads = read_int(1, 256, "Number of heads");
- update_units();
- break;
- case 'p': x_list_table(0);
- break;
- case 'q': close(fd);
- exit(0);
- case 'r': return;
- case 's': sectors = read_int(1, 63,
- "Number of sectors");
- if (dos_compatible_flag) {
- sector_offset = sectors;
- if ( listing != 1 ) {
- fprintf(stderr, "Warning: setting "
- "sector offset for DOS "
- "compatiblity\n");
- }
- }
- update_units();
- break;
- case 'w': write_table();
- default: xmenu();
- }
- }
- }
-
- void try(char *device)
- {
- disk_device = device;
- if (!setjmp(listingbuf))
- if ((fd = open(disk_device, O_RDWR)) >= 0) {
- close(fd);
- get_boot();
- list_table();
- if (partitions > 4)
- delete_partition(ext_index);
- }
- }
-
- void main(int argc, char **argv)
- {
- if (argc > 3)
- fatal(usage);
- if (argc > 1 && *argv[1] == '-') {
- switch (*(argv[1] + 1)) {
- case 'v':
- printf("fdisk v" VERSION "\n");
- exit(0);
- case 'l':
- listing = 1;
- try("/dev/hda");
- try("/dev/hdb");
- try("/dev/hdc");
- try("/dev/hdd");
- try("/dev/sda");
- try("/dev/sdb");
- try("/dev/sdc");
- try("/dev/sdd");
- try("/dev/sde");
- try("/dev/sdf");
- try("/dev/sdg");
- try("/dev/sdh");
- exit(0);
- case 's': {
- int i;
- if (argc < 3)
- fatal(usage);
- if (!(i = atoi(argv[2] + 8)))
- fatal(usage);
- disk_device = (char *) malloc(9);
- strncpy(disk_device, argv[2], 8);
- if ((fd = open(disk_device, O_RDWR)) >= 0) {
- close(fd);
- get_boot();
- if (i > partitions) exit(1);
- if (part_table[--i]->sys_ind > 10)
- printf("%d\n",
- part_table[i]->nr_sects / 2);
- else exit(1);
- exit(0);
- }
- }
- default:
- fatal(usage);
- }
- }
- if (argc > 1)
- disk_device = argv[argc - 1];
- else if ((fd = open(DEFAULT_DEVICE, O_RDWR)) < 0)
- disk_device = ALTERNATE_DEVICE;
- else close(fd);
-
- get_boot();
- if (argc == 1)
- printf("Using %s as default device!\n", disk_device);
-
- while (1) {
- putchar('\n');
- switch (tolower(read_char("Command (m for help): "))) {
- case 'a': toggle_active(get_partition(1, partitions));
- break;
- case 'c':
- toggle_dos();
- break;
- case 'd': delete_partition(
- get_partition(1, partitions));
- break;
- case 'l': list_types();
- break;
- case 'n': new_partition();
- break;
- case 'p': list_table();
- break;
- case 'q': close(fd);
- exit(0);
- case 't': change_sysid();
- break;
- case 'u': change_units();
- break;
- case 'v': verify();
- break;
- case 'w': write_table();
- case 'x': xselect();
- break;
- default: menu();
- }
- }
- }
-