xref: /onnv-gate/usr/src/cmd/fdisk/fdisk.c (revision 0:68f95e015346)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1990, 1991 UNIX System Laboratories, Inc.	*/
/*	Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T	*/
/*	  All Rights Reserved	*/

/*	Copyright (c) 1987, 1988 Microsoft Corporation	*/
/*	  All Rights Reserved	*/

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*
 * PROGRAM: fdisk(1M)
 * This program reads the partition table on the specified device and
 * also reads the drive parameters. The user can perform various
 * operations from a supplied menu or from the command line. Diagnostic
 * options are also available.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systeminfo.h>
#include <sys/efi_partition.h>
#include <sys/byteorder.h>
#include <sys/systeminfo.h>

#include <sys/dktp/fdisk.h>
#include <sys/dkio.h>
#include <sys/vtoc.h>

#define	CLR_SCR ""
#define	CLR_LIN ""
#define	HOME "" \
	""
#define	Q_LINE ""
#define	W_LINE ""
#define	E_LINE ""
#define	M_LINE "" \
	""
#define	T_LINE ""

#define	DEFAULT_PATH	"/dev/rdsk/"

/* XXX - should be in fdisk.h, used by sd as well */

/*
 * the MAX values are the maximum usable values for BIOS chs values
 * The MAX_CYL value of 1022 is the maximum usable value
 *   the value of 1023 is a fence value,
 *   indicating no CHS geometry exists for the corresponding LBA value.
 * HEAD range [ 0 .. MAX_HEAD ], so number of heads is (MAX_HEAD + 1)
 * SECT range [ 1 .. MAX_SECT ], so number of sectors is (MAX_SECT)
 */
#define	MAX_SECT	(63)
#define	MAX_CYL		(1022)
#define	MAX_HEAD	(254)

/* for clear_vtoc() */
#define	OLD		0
#define	NEW		1

/* readvtoc/writevtoc return codes */
#define	VTOC_OK		0	/* Good VTOC */
#define	VTOC_INVAL	1	/* invalid VTOC */
#define	VTOC_NOTSUP	2	/* operation not supported - EFI label */
#define	VTOC_RWERR	3	/* couldn't read or write VTOC */

/*
 * Support for fdisk(1M) on the SPARC platform
 *	In order to convert little endian values to big endian for SPARC,
 *	byte/short and long values must be swapped.
 *	These swapping macros will be used to access information in the
 *	mboot and ipart structures.
 */

#ifdef sparc
#define	les(val)	((((val)&0xFF)<<8)|(((val)>>8)&0xFF))
#define	lel(val)	(((unsigned)(les((val)&0x0000FFFF))<<16) | \
			    (les((unsigned)((val)&0xffff0000)>>16)))
#else
#define	les(val)	(val)
#define	lel(val)	(val)
#endif

#if defined(_SUNOS_VTOC_16)
#define	VTOC_OFFSET	512
#elif defined(_SUNOS_VTOC_8)
#define	VTOC_OFFSET	0
#else
#error No VTOC format defined.
#endif

char Usage[] = "Usage: fdisk\n"
"[ -A id:act:bhead:bsect:bcyl:ehead:esect:ecyl:rsect:numsect ]\n"
"[ -b masterboot ]\n"
"[ -D id:act:bhead:bsect:bcyl:ehead:esect:ecyl:rsect:numsect ]\n"
"[ -F fdisk_file ] [ -h ] [ -o offset ] [ -P fill_patt ] [ -s size ]\n"
"[ -S geom_file ] [ [ -v ] -W { creat_fdisk_file | - } ]\n"
"[ -w | r | d | n | I | B | E | g | G | R | t | T ] rdevice";

char Usage1[] = "    Partition options:\n"
"	-A id:act:bhead:bsect:bcyl:ehead:esect:ecyl:rsect:numsect\n"
"		Create a partition with specific attributes:\n"
"		id      = system id number (fdisk.h) for the partition type\n"
"		act     = active partition flag (0 is off and 128 is on)\n"
"		bhead   = beginning head for start of partition\n"
"		bsect   = beginning sector for start of partition\n"
"		bcyl    = beginning cylinder for start of partition\n"
"		ehead   = ending head for end of partition\n"
"		esect   = ending sector for end of partition\n"
"		ecyl    = ending cylinder for end of partition\n"
"		rsect   = sector number from start of disk for\n"
"			  start of partition\n"
"		numsect = partition size in sectors\n"
"	-b master_boot\n"
"		Use master_boot as the master boot file.\n"
"	-B	Create one Solaris partition that uses the entire disk.\n"
"	-E	Create one EFI partition that uses the entire disk.\n"
"	-D id:act:bhead:bsect:bcyl:ehead:esect:ecyl:rsect:numsect\n"
"		Delete a partition. See attribute definitions for -A.\n"
"	-F fdisk_file\n"
"		Use fdisk_file to initialize on-line fdisk table.\n"
"	-I	Forego device checks. Generate a file image of what would go\n"
"		on a disk using the geometry specified with the -S option.\n"
"	-n	Do not run in interactive mode.\n"
"	-R	Open the disk device as read-only.\n"
"	-t	Check and adjust VTOC to be consistent with fdisk table.\n"
"		VTOC slices exceeding the partition size will be truncated.\n"
"	-T	Check and adjust VTOC to be consistent with fdisk table.\n"
"		VTOC slices exceeding the partition size will be removed.\n"
"	-W fdisk_file\n"
"		Write on-disk table to fdisk_file.\n"
"	-W -	Write on-disk table to standard output.\n"
"	-v	Display virtual geometry. Must be used with the -W option.\n"
"    Diagnostic options:\n"
"	-d	Activate debug information about progress.\n"
"	-g	Write label geometry to standard output:\n"
"		PCYL		number of physical cylinders\n"
"		NCYL		number of usable cylinders\n"
"		ACYL		number of alternate cylinders\n"
"		BCYL		cylinder offset\n"
"		NHEADS		number of heads\n"
"		NSECTORS	number of sectors per track\n"
"		SECTSIZ		size of a sector in bytes\n"
"	-G	Write physical geometry to standard output (see -g).\n"
"	-h	Issue this verbose help message.\n"
"	-o offset\n"
"		Block offset from start of disk (default 0). Ignored if\n"
"		-P # specified.\n"
"	-P fill_patt\n"
"		Fill disk with pattern fill_patt. fill_patt can be decimal or\n"
"		hexadecimal and is used as number for constant long word\n"
"		pattern. If fill_patt is \"#\" then pattern of block #\n"
"		for each block. Pattern is put in each block as long words\n"
"		and fills each block (see -o and -s).\n"
"	-r	Read from a disk to stdout (see -o and -s).\n"
"	-s size	Number of blocks on which to perform operation (see -o).\n"
"	-S geom_file\n"
"		Use geom_file to set the label geometry (see -g).\n"
"	-w	Write to a disk from stdin (see -o and -s).";

char Ostr[] = "Other OS";
char Dstr[] = "DOS12";
char D16str[] = "DOS16";
char DDstr[] = "DOS-DATA";
char EDstr[] = "EXT-DOS";
char DBstr[] = "DOS-BIG";
char PCstr[] = "PCIX";
char Ustr[] = "UNIX System";
char SUstr[] = "Solaris";
char SU2str[] = "Solaris2";
char X86str[] = "x86 Boot";
char DIAGstr[] = "Diagnostic";
char IFSstr[] = "IFS: NTFS";
char AIXstr[] = "AIX Boot";
char AIXDstr[] = "AIX Data";
char OS2str[] = "OS/2 Boot";
char WINstr[] = "Win95 FAT32";
char EWINstr[] = "Ext Win95";
char FAT95str[] = "FAT16 LBA";
char EXTLstr[] = "EXT LBA";
char LINUXstr[] = "Linux";
char CPMstr[] = "CP/M";
char NOVstr[] = "Netware 3.x+";
char QNXstr[] = "QNX 4.x";
char QNX2str[] = "QNX part 2";
char QNX3str[] = "QNX part 3";
char LINNATstr[] = "Linux native";
char NTFSVOL1str[] = "NT volset 1";
char NTFSVOL2str[] = "NT volset 2";
char BSDstr[] = "BSD OS";
char NEXTSTEPstr[] = "NeXTSTEP";
char BSDIFSstr[] = "BSDI FS";
char BSDISWAPstr[] = "BSDI swap";
char Actvstr[] = "Active";
char EFIstr[] = "EFI";
char NAstr[] = "      ";

/* All the user options and flags */
char *Dfltdev;			/* name of fixed disk drive */

/* Diagnostic options */
int	io_wrt = 0;		/* write standard input to disk (-w) */
int	io_rd = 0;		/* read from disk and write to stdout (-r) */
char	*io_fatt;		/* user supplied pattern (-P pattern) */
int	io_patt = 0;		/* write a pattern to disk (-P pattern) */
int	io_lgeom = 0;		/* get label geometry (-g) */
int	io_pgeom = 0;		/* get drive physical geometry (-G) */
char	*io_sgeom = 0;		/* set label geometry (-S geom_file) */
int	io_readonly = 0;		/* do not write to disk (-R) */

/* The -o offset and -s size options specify the area of the disk on */
/* which to perform the particular operation; i.e., -P, -r, or -w. */
int	io_offset = 0;		/* offset sector (-o offset) */
int	io_size = 0;		/* size in sectors (-s size) */

/* Partition table flags */
int	v_flag = 0;		/* virtual geometry-HBA flag (-v) */
int 	stdo_flag = 0;		/* stdout flag (-W -) */
int	io_fdisk = 0;		/* do fdisk operation */
int	io_ifdisk = 0;		/* interactive partition */
int	io_nifdisk = 0;		/* non-interactive partition (-n) */

int	io_adjt = 0;		/* check and adjust VTOC (truncate (-t)) */
int	io_ADJT = 0;		/* check and adjust VTOC (delete (-T)) */
char	*io_ffdisk = 0;		/* name of input fdisk file (-F file) */
char	*io_Wfdisk = 0;		/* name of output fdisk file (-W file) */
char	*io_Afdisk = 0;		/* entry to add to partition table (-A) */
char	*io_Dfdisk = 0;		/* entry to delete from partition table (-D) */

char	*io_mboot = 0;		/* master boot record (-b boot_file) */

struct mboot BootCod;		/* buffer for master boot record */

int	io_wholedisk = 0;	/* use whole disk for Solaris partition (-B) */
int	io_EFIdisk = 0;		/* use whole disk for EFI partition (-E) */
int	io_debug = 0;		/* activate verbose mode (-d) */
int	io_image = 0;		/* create image using supplied geometry (-I) */

struct mboot *Bootblk;		/* pointer to cut and paste sector zero */
char	*Bootsect;		/* pointer to sector zero buffer */
char	*Nullsect;
struct vtoc	disk_vtoc;	/* verify VTOC table */
int	vt_inval = 0;
int	no_virtgeom_ioctl = 0;	/* ioctl for virtual geometry failed */
int	no_physgeom_ioctl = 0;	/* ioctl for physical geometry failed */

struct ipart	Table[FD_NUMPART];
struct ipart	Old_Table[FD_NUMPART];

/* Disk geometry information */
struct dk_geom	disk_geom;

int Dev;			/* fd for open device */
/* Physical geometry for the drive */
int	Numcyl;			/* number of cylinders */
int	heads;			/* number of heads */
int	sectors;		/* number of sectors per track */
int	acyl;			/* number of alternate sectors */

/* HBA (virtual) geometry for the drive */
int	hba_Numcyl;		/* number of cylinders */
int	hba_heads;		/* number of heads */
int	hba_sectors;		/* number of sectors per track */

int	sectsiz;		/* sector size */
int	drtype;			/* Type of drive; i.e., scsi, floppy, ... */

/* Load functions for fdisk table modification */
#define	LOADFILE	0	/* load fdisk from file */
#define	LOADDEL		1	/* delete an fdisk entry */
#define	LOADADD		2	/* add an fdisk entry */

#define	CBUFLEN 80
char s[CBUFLEN];

void		sanity_check_provided_device(char *devname, int fd);
static int	clear_vtoc(int table, int part);
static char	*get_node(char *devname);
static void	Set_Table_CHS_Values(int ti);

static void
update_disk_and_exit(boolean_t table_changed)
{
	if (table_changed) {
		/*
		 * Copy the new table back to the sector buffer
		 * and write it to disk
		 */
		copy_Table_to_Bootblk();
		dev_mboot_write(0, Bootsect, sectsiz);
	}

	/* If the VTOC table is wrong fix it (truncation only) */
	if (io_adjt)
		fix_slice();

	exit(0);
}



/*
 * main
 * Process command-line options.
 */
void
main(int argc, char *argv[])
{
	int c, i, j;
	extern	int optind;
	extern	char *optarg;
	int	errflg = 0;
	int	diag_cnt = 0;
	int openmode;
	int check_support_fdisk();

	setbuf(stderr, 0);	/* so all output gets out on exit */
	setbuf(stdout, 0);

	/* Process the options. */
	while ((c = getopt(argc, argv, "o:s:P:F:b:A:D:W:S:tTIhwvrndgGRBE"))
	    != EOF) {
		switch (c) {

			case 'o':
				io_offset = strtoul(optarg, 0, 0);
				continue;
			case 's':
				io_size = strtoul(optarg, 0, 0);
				continue;
			case 'P':
				diag_cnt++;
				io_patt++;
				io_fatt = optarg;
				continue;
			case 'w':
				diag_cnt++;
				io_wrt++;
				continue;
			case 'r':
				diag_cnt++;
				io_rd++;
				continue;
			case 'd':
				io_debug++;
				continue;
			case 'I':
				io_image++;
				continue;
			case 'R':
				io_readonly++;
				continue;
			case 'S':
				diag_cnt++;
				io_sgeom = optarg;
				continue;
			case 'T':
				io_ADJT++;
			case 't':
				io_adjt++;
				continue;
			case 'B':
				io_wholedisk++;
				io_fdisk++;
				continue;
			case 'E':
				io_EFIdisk++;
				io_fdisk++;
				continue;
			case 'g':
				diag_cnt++;
				io_lgeom++;
				continue;
			case 'G':
				diag_cnt++;
				io_pgeom++;
				continue;
			case 'n':
				io_nifdisk++;
				io_fdisk++;
				continue;
			case 'F':
				io_fdisk++;
				io_ffdisk = optarg;
				continue;
			case 'b':
				io_mboot = optarg;
				continue;
			case 'W':
				/*
				 * If '-' is the -W argument, then write
				 * to standard output, otherwise write
				 * to the specified file.
				 */
				if (strncmp(optarg, "-", 1) == 0)
					stdo_flag = 1;
				else
					io_Wfdisk = optarg;
				io_fdisk++;
				continue;
			case 'A':
				io_fdisk++;
				io_Afdisk = optarg;
				continue;
			case 'D':
				io_fdisk++;
				io_Dfdisk = optarg;
				continue;
			case 'h':
				fprintf(stderr, "%s\n", Usage);
				fprintf(stderr, "%s\n", Usage1);
				exit(0);
			case 'v':
				v_flag = 1;
				continue;
			case '?':
				errflg++;
				break;
		}
		break;
	}

	if (io_image && io_sgeom && diag_cnt == 1) {
		diag_cnt = 0;
	}

	/* User option checking */

	/* By default, run in interactive mode */
	if (!io_fdisk && !diag_cnt && !io_nifdisk) {
		io_ifdisk++;
		io_fdisk++;
	}
	if (((io_fdisk || io_adjt) && diag_cnt) || (diag_cnt > 1)) {
		errflg++;
	}

	/* Was any error detected? */
	if (errflg || argc == optind) {
		fprintf(stderr, "%s\n", Usage);
		fprintf(stderr,
		    "\nDetailed help is available with the -h option.\n");
		exit(2);
	}


	/* Figure out the correct device node to open */
	Dfltdev = get_node(argv[optind]);

	if (io_readonly)
		openmode = O_RDONLY;
	else
		openmode = O_RDWR|O_CREAT;

	if ((Dev = open(Dfltdev, openmode, 0666)) == -1) {
		fprintf(stderr, "fdisk: Cannot open device %s.\n", Dfltdev);
		exit(1);
	}

	/* Get the disk geometry */
	if (!io_image) {
		/* Get disk's HBA (virtual) geometry */
		errno = 0;
		if (ioctl(Dev, DKIOCG_VIRTGEOM, &disk_geom)) {

			/*
			 * If ioctl isn't implemented on this platform, then
			 * turn off flag to print out virtual geometry (-v),
			 * otherwise use the virtual geometry.
			 */

			if (errno == ENOTTY) {
				v_flag = 0;
				no_virtgeom_ioctl = 1;
			} else if (errno == EINVAL) {
				/*
				 * This means that the ioctl exists, but
				 * is invalid for this disk, meaning the
				 * disk doesn't have an HBA geometry
				 * (like, say, it's larger than 8GB).
				 */
				v_flag = 0;
				hba_Numcyl = hba_heads = hba_sectors = 0;
			} else {
				(void) fprintf(stderr,
				    "%s: Cannot get virtual disk geometry.\n",
				    argv[optind]);
				exit(1);
			}
		} else {
			/* save virtual geometry values obtained by ioctl */
			hba_Numcyl = disk_geom.dkg_ncyl;
			hba_heads = disk_geom.dkg_nhead;
			hba_sectors = disk_geom.dkg_nsect;
		}

		errno = 0;
		if (ioctl(Dev, DKIOCG_PHYGEOM, &disk_geom)) {
			if (errno == ENOTTY) {
				no_physgeom_ioctl = 1;
			} else {
				(void) fprintf(stderr,
				    "%s: Cannot get physical disk geometry.\n",
				    argv[optind]);
				exit(1);
			}

		}
		/*
		 * Call DKIOCGGEOM if the ioctls for physical and virtual
		 * geometry fail. Get both from this generic call.
		 */
		if (no_virtgeom_ioctl && no_physgeom_ioctl) {
			errno = 0;
			if (ioctl(Dev, DKIOCGGEOM, &disk_geom)) {
				(void) fprintf(stderr,
				    "%s: Cannot get disk label geometry.\n",
				    argv[optind]);
				exit(1);
			}
		}

		Numcyl = disk_geom.dkg_ncyl;
		heads = disk_geom.dkg_nhead;
		sectors = disk_geom.dkg_nsect;
		sectsiz = 512;
		acyl = disk_geom.dkg_acyl;

		/*
		 * if hba geometry was not set by DKIOC_VIRTGEOM
		 * or we got an invalid hba geometry
		 * then set hba geometry based on max values
		 */
		if (no_virtgeom_ioctl ||
		    disk_geom.dkg_ncyl <= 0 ||
		    disk_geom.dkg_nhead <= 0 ||
		    disk_geom.dkg_nsect <= 0 ||
		    disk_geom.dkg_ncyl > MAX_CYL ||
		    disk_geom.dkg_nhead > MAX_HEAD ||
		    disk_geom.dkg_nsect > MAX_SECT) {

			/*
			 * turn off flag to print out virtual geometry (-v)
			 */
			v_flag = 0;
			hba_sectors	= MAX_SECT;
			hba_heads	= MAX_HEAD + 1;
			hba_Numcyl	= (Numcyl * heads * sectors) /
			    (hba_sectors * hba_heads);
		}

		if (io_debug) {
			fprintf(stderr, "Physical Geometry:\n");
			fprintf(stderr,
			    "  cylinders[%d] heads[%d] sectors[%d]\n"
			    "  sector size[%d] blocks[%d] mbytes[%d]\n",
			    Numcyl,
			    heads,
			    sectors,
			    sectsiz,
			    Numcyl*heads*sectors,
			    (Numcyl*heads*sectors*sectsiz)/1048576);
			fprintf(stderr, "Virtual (HBA) Geometry:\n");
			fprintf(stderr,
			    "  cylinders[%d] heads[%d] sectors[%d]\n"
			    "  sector size[%d] blocks[%d] mbytes[%d]\n",
			    hba_Numcyl,
			    hba_heads,
			    hba_sectors,
			    sectsiz,
			    hba_Numcyl*hba_heads*hba_sectors,
			    (hba_Numcyl*hba_heads*hba_sectors*sectsiz)/1048576);
		}
	}

	/* If user has requested a geometry report just do it and exit */
	if (io_lgeom) {
		if (ioctl(Dev, DKIOCGGEOM, &disk_geom)) {
			(void) fprintf(stderr,
			    "%s: Cannot get disk label geometry.\n",
			    argv[optind]);
			exit(1);
		}
		Numcyl = disk_geom.dkg_ncyl;
		heads = disk_geom.dkg_nhead;
		sectors = disk_geom.dkg_nsect;
		sectsiz = 512;
		acyl = disk_geom.dkg_acyl;
		printf("* Label geometry for device %s\n", Dfltdev);
		printf("* PCYL     NCYL     ACYL     BCYL     NHEAD NSECT"
		    " SECSIZ\n");
		printf("  %-8d %-8d %-8d %-8d %-5d %-5d %-6d\n",
		    Numcyl,
		    disk_geom.dkg_ncyl,
		    disk_geom.dkg_acyl,
		    disk_geom.dkg_bcyl,
		    heads,
		    sectors,
		    sectsiz);
		exit(0);
	} else if (io_pgeom) {
		if (ioctl(Dev, DKIOCG_PHYGEOM, &disk_geom)) {
			(void) fprintf(stderr,
			    "%s: Cannot get physical disk geometry.\n",
			    argv[optind]);
			exit(1);
		}
		printf("* Physical geometry for device %s\n", Dfltdev);
		printf("* PCYL     NCYL     ACYL     BCYL     NHEAD NSECT"
		    " SECSIZ\n");
		printf("  %-8d %-8d %-8d %-8d %-5d %-5d %-6d\n",
		    disk_geom.dkg_pcyl,
		    disk_geom.dkg_ncyl,
		    disk_geom.dkg_acyl,
		    disk_geom.dkg_bcyl,
		    disk_geom.dkg_nhead,
		    disk_geom.dkg_nsect,
		    sectsiz);
		exit(0);
	} else if (io_sgeom) {
		if (read_geom(io_sgeom)) {
			exit(1);
		} else if (!io_image) {
			exit(0);
		}
	}

	/* Allocate memory to hold three complete sectors */
	Bootsect = (char *)malloc(3 * sectsiz);
	if (Bootsect == NULL) {
		fprintf(stderr,
		    "fdisk: Unable to obtain enough buffer memory"
		    " (%d bytes).\n",
		    3*sectsiz);
		exit(1);
	}

	Nullsect = Bootsect + sectsiz;
	/* Zero out the "NULL" sector */
	for (i = 0; i < sectsiz; i++) {
		Nullsect[i] = 0;
	}

	/* Find out what the user wants done */
	if (io_rd) {		/* abs disk read */
		abs_read();	/* will not return */
	} else if (io_wrt && !io_readonly) {
		abs_write();	/* will not return */
	} else if (io_patt && !io_readonly) {
		fill_patt();	/* will not return */
	}


	/* This is the fdisk edit, the real reason for the program.	*/

	sanity_check_provided_device(Dfltdev, Dev);

	/* Get the new BOOT program in case we write a new fdisk table */
	mboot_read();

	/* Read from disk master boot */
	dev_mboot_read();

	/*
	 * Verify and copy the device's fdisk table. This will be used
	 * as the prototype mboot if the device's mboot looks invalid.
	 */
	Bootblk = (struct mboot *)Bootsect;
	copy_Bootblk_to_Table();

	/* save away a copy of Table in Old_Table for sensing changes */
	copy_Table_to_Old_Table();

	/* Load fdisk table from specified file (-F fdisk_file) */
	if (io_ffdisk) {
		/* Load and verify user-specified table parameters */
		load(LOADFILE, io_ffdisk);
	}

	/* Does user want to delete or add an entry? */
	if (io_Dfdisk) {
		load(LOADDEL, io_Dfdisk);
	}
	if (io_Afdisk) {
		load(LOADADD, io_Afdisk);
	}

	if (!io_ffdisk && !io_Afdisk && !io_Dfdisk) {
		/* Check if there is no fdisk table */
		if (Table[0].systid == UNUSED || io_wholedisk || io_EFIdisk) {
			if (io_ifdisk && !io_wholedisk && !io_EFIdisk) {
				printf("No fdisk table exists. The default"
				    " partition for the disk is:\n\n");
				printf("  a 100%% \"SOLARIS System\" "
				    "partition\n\n");
				printf("Type \"y\" to accept the default "
				    "partition,  otherwise type \"n\" to "
				    "edit the\n partition table.\n");
			}

			/* Edit the partition table as directed */
			if (io_wholedisk ||(io_ifdisk && yesno())) {

				/* Default scenario */
				nulltbl();

				/* now set up UNIX System partition */
				Table[0].bootid = ACTIVE;
				Table[0].relsect = lel(heads * sectors);
				Table[0].numsect = lel((long)((Numcyl-1) *
				    heads * sectors));
				Table[0].systid = SUNIXOS2;   /* Solaris */

				/* calculate CHS values for table entry 0 */
				Set_Table_CHS_Values(0);

				update_disk_and_exit(B_TRUE);
			} else if (io_EFIdisk) {
				/* create an EFI partition for the whole disk */
				nulltbl();
				i = insert_tbl(EFI_PMBR, 0, 0, 0, 0, 0, 0, 0, 1,
				    (Numcyl * heads * sectors) - 1);
				if (i != 0) {
					fprintf(stderr, "Error creating EFI "
					    "partition\n");
					exit(1);
				}
				update_disk_and_exit(B_TRUE);
			}
		}
	}

	/* Display complete fdisk table entries for debugging purposes */
	if (io_debug) {
		fprintf(stderr, "Partition Table Entry Values:\n");
		print_Table();
		if (io_ifdisk) {
			fprintf(stderr, "\n");
			fprintf(stderr, "Press Enter to continue.\n");
			gets(s);
		}
	}

	/* Interactive fdisk mode */
	if (io_ifdisk) {
		printf(CLR_SCR);
		disptbl();
		while (1) {
			stage0(argv[1]);
			copy_Bootblk_to_Table();
			disptbl();
		}
	}

	/* If user wants to write the table to a file, do it */
	if (io_Wfdisk)
		ffile_write(io_Wfdisk);
	else if (stdo_flag)
		ffile_write((char *)stdout);

	update_disk_and_exit(TableChanged() == 1);
}

/*
 * read_geom
 * Read geometry from specified file (-S).
 */

read_geom(sgeom)
char	*sgeom;
{
	char	line[256];
	FILE *fp;

	/* open the prototype file */
	if ((fp = fopen(sgeom, "r")) == NULL) {
		(void) fprintf(stderr, "fdisk: Cannot open file %s.\n",
		    io_sgeom);
		return (1);
	}

	/* Read a line from the file */
	while (fgets(line, sizeof (line) - 1, fp)) {
		if (line[0] == '\0' || line[0] == '\n' || line[0] == '*')
			continue;
		else {
			line[strlen(line)] = '\0';
			if (sscanf(line, "%d %d %d %d %d %d %d",
			    &disk_geom.dkg_pcyl,
			    &disk_geom.dkg_ncyl,
			    &disk_geom.dkg_acyl,
			    &disk_geom.dkg_bcyl,
			    &disk_geom.dkg_nhead,
			    &disk_geom.dkg_nsect,
			    &sectsiz) != 7) {
				(void) fprintf(stderr,
				    "Syntax error:\n	\"%s\".\n",
				    line);
				return (1);
			}
			break;
		} /* else */
	} /* while (fgets(line, sizeof (line) - 1, fp)) */

	if (!io_image) {
		if (ioctl(Dev, DKIOCSGEOM, &disk_geom)) {
			(void) fprintf(stderr,
			    "fdisk: Cannot set label geometry.\n");
			return (1);
		}
	} else {
		Numcyl = hba_Numcyl = disk_geom.dkg_ncyl;
		heads = hba_heads = disk_geom.dkg_nhead;
		sectors = hba_sectors = disk_geom.dkg_nsect;
		acyl = disk_geom.dkg_acyl;
	}

	fclose(fp);
	return (0);
}

/*
 * dev_mboot_read
 * Read the master boot sector from the device.
 */
dev_mboot_read()
{
	if ((ioctl(Dev, DKIOCGMBOOT, Bootsect) < 0) && (errno != ENOTTY)) {
		perror("Error in ioctl DKIOCGMBOOT");
	}
	if (errno == 0)
		return;
	if (lseek(Dev, 0, SEEK_SET) == -1) {
		fprintf(stderr,
		    "fdisk: Error seeking to partition table on %s.\n",
		    Dfltdev);
		if (!io_image)
			exit(1);
	}
	if (read(Dev, Bootsect, sectsiz) != sectsiz) {
		fprintf(stderr,
		    "fdisk: Error reading partition table from %s.\n",
		    Dfltdev);
		if (!io_image)
			exit(1);
	}
}

/*
 * dev_mboot_write
 * Write the master boot sector to the device.
 */
dev_mboot_write(int sect, char *buff, int bootsiz)
{
	int 	new_pt, old_pt, error;
	int	clr_efi = -1, old_solaris = -1, new_solaris = -1;

	if (io_readonly)
		return (0);

	if (io_debug) {
		fprintf(stderr, "About to write fdisk table:\n");
		print_Table();
		if (io_ifdisk) {
			fprintf(stderr, "Press Enter to continue.\n");
			gets(s);
		}
	}

	/* see if the old table had EFI or Solaris partitions */
	for (old_pt = 0; old_pt < FD_NUMPART; old_pt++) {
		if (Old_Table[old_pt].systid == SUNIXOS ||
		    Old_Table[old_pt].systid == SUNIXOS2) {
			old_solaris = old_pt;
		} else if (Old_Table[old_pt].systid == EFI_PMBR) {
			clr_efi = old_pt;
		}
	}

	/* look to see if Solaris partition changed in relsect/numsect */
	for (new_pt = 0; new_pt < FD_NUMPART; new_pt++) {

		/*
		 * if this is not a Solaris partition, ignore it
		 */
		if (Table[new_pt].systid != SUNIXOS &&
		    Table[new_pt].systid != SUNIXOS2)
			continue;

		/*
		 * if there was no previous Solaris partition
		 * or if the old partition was in a different place
		 * or if the old partition was a different size
		 * then this must be a new Solaris partition
		 */
		if (old_solaris == -1 ||
		    Old_Table[old_solaris].relsect != Table[new_pt].relsect ||
		    Old_Table[old_solaris].numsect != Table[new_pt].numsect) {
			new_solaris = new_pt;
			break;
		}
	}

	/* look to see if a EFI partition changed in relsect/numsect */
	for (new_pt = 0; new_pt < FD_NUMPART; new_pt++) {
		if (Table[new_pt].systid != EFI_PMBR)
			continue;
		for (old_pt = 0; old_pt < FD_NUMPART; old_pt++) {
		    if ((Old_Table[old_pt].systid == Table[new_pt].systid) &&
			(Old_Table[old_pt].relsect == Table[new_pt].relsect) &&
			(Old_Table[old_pt].numsect == Table[new_pt].numsect))
			    break;
		}

		/*
		 * if EFI partition changed, set the flag to clear
		 * the EFI GPT
		 */
		if (old_pt == FD_NUMPART && Table[new_pt].begcyl != 0) {
			clr_efi = 0;
		}
		break;
	}

	/* clear labels if necessary */
	if (clr_efi >= 0) {
		if (io_debug) {
			fprintf(stderr, "Clearing EFI labels\n");
		}
		if ((error = clear_efi()) != 0) {
			if (io_debug) {
				fprintf(stderr, "\tError %d clearing EFI labels"
				    " (probably no EFI labels exist)\n",
				    error);
			}
		}
	}

	if (new_solaris >= 0) {
		if (io_debug) {
			fprintf(stderr, "Clearing VTOC labels from NEW"
			    " table\n");
		}
		clear_vtoc(NEW, new_solaris);
	}

	if ((ioctl(Dev, DKIOCSMBOOT, buff) == -1) && (errno != ENOTTY)) {
		fprintf(stderr,
		    "fdisk: Error in ioctl DKIOCSMBOOT on %s.\n",
		    Dfltdev);
	}
	if (errno == 0)
		return;

	/* write to disk drive */
	if (lseek(Dev, sect, SEEK_SET) == -1) {
		fprintf(stderr,
		    "fdisk: Error seeking to master boot record on %s.\n",
		    Dfltdev);
		exit(1);
	}
	if (write(Dev, buff, bootsiz) != bootsiz) {
		fprintf(stderr,
		    "fdisk: Error writing master boot record to %s.\n",
		    Dfltdev);
		exit(1);
	}
}

/*
 * mboot_read
 * Read the prototype boot records from the files.
 */
mboot_read()
{
	int mDev, i;
	struct	stat	statbuf;
	struct ipart *part;

#if defined(i386) || defined(sparc)
	/*
	 * If the master boot file hasn't been specified, use the
	 * implementation architecture name to generate the default one.
	 */
	if (io_mboot == (char *)0) {
		/*
		 * Bug ID 1249035:
		 *	The mboot file must be delivered on all platforms
		 *	and installed in a non-platform-dependent
		 *	directory; i.e., /usr/lib/fs/ufs.
		 */
		io_mboot = "/usr/lib/fs/ufs/mboot";
	}

	/* First read in the master boot record */

	/* Open the master boot proto file */
	if ((mDev = open(io_mboot, O_RDONLY, 0666)) == -1) {
		fprintf(stderr,
		    "fdisk: Cannot open master boot file %s.\n",
		    io_mboot);
		exit(1);
	}

	/* Read the master boot program */
	if (read(mDev, &BootCod, sizeof (struct mboot)) != sizeof
	    (struct mboot)) {
		fprintf(stderr,
		    "fdisk: Cannot read master boot file %s.\n",
		    io_mboot);
		exit(1);
	}

	/* Is this really a master boot record? */
	if (les(BootCod.signature) != MBB_MAGIC) {
		fprintf(stderr,
		    "fdisk: Invalid master boot file %s.\n", io_mboot);
		fprintf(stderr, "Bad magic number: is %x, but should be %x.\n",
		    les(BootCod.signature), MBB_MAGIC);
		exit(1);
	}

	close(mDev);
#else
#error	fdisk needs to be ported to new architecture
#endif

	/* Zero out the partitions part of this record */
	part = (struct ipart *)BootCod.parts;
	for (i = 0; i < FD_NUMPART; i++, part++) {
		memset(part, 0, sizeof (struct ipart));
	}

}

/*
 * fill_patt
 * Fill the disk with user/sector number pattern.
 */
fill_patt()
{
	int	*buff_ptr, i, c;
	int	io_fpatt = 0;
	int	io_ipatt = 0;

	if (strncmp(io_fatt, "#", 1) != 0) {
		io_fpatt++;
		io_ipatt = strtoul(io_fatt, 0, 0);
		buff_ptr = (int *)Bootsect;
		for (i = 0; i < sectsiz; i += 4, buff_ptr++)
		    *buff_ptr = io_ipatt;
	}

	/*
	 * Fill disk with pattern based on block number.
	 * Write to the disk at absolute relative block io_offset
	 * for io_size blocks.
	 */
	while (io_size--) {
		buff_ptr = (int *)Bootsect;
		if (!io_fpatt) {
			for (i = 0; i < sectsiz; i += 4, buff_ptr++)
				*buff_ptr = io_offset;
		}
		/* Write the data to disk */
		if (lseek(Dev, sectsiz * io_offset++, SEEK_SET) == -1) {
			fprintf(stderr, "fdisk: Error seeking on %s.\n",
				Dfltdev);
			exit(1);
		}
		if (write(Dev, Bootsect, sectsiz) != sectsiz) {
			fprintf(stderr, "fdisk: Error writing %s.\n",
				Dfltdev);
			exit(1);
		}
	} /* while (--io_size); */
}

/*
 * abs_read
 * Read from the disk at absolute relative block io_offset for
 * io_size blocks. Write the data to standard ouput (-r).
 */
abs_read() {
	int c;

	while (io_size--) {
		if (lseek(Dev, sectsiz * io_offset++, SEEK_SET) == -1) {
			fprintf(stderr, "fdisk: Error seeking on %s.\n",
			    Dfltdev);
			exit(1);
		}
		if (read(Dev, Bootsect, sectsiz) != sectsiz) {
			fprintf(stderr, "fdisk: Error reading %s.\n",
			    Dfltdev);
			exit(1);
		}

		/* Write to standard ouptut */
		if ((c = write(1, Bootsect, (unsigned)sectsiz)) != sectsiz)
		{
			if (c >= 0) {
				if (io_debug)
				fprintf(stderr,
				    "fdisk: Output warning: %d of %d"
				    " characters written.\n",
				    c, sectsiz);
				exit(2);
			} else {
				perror("write error on output file.");
				exit(2);
			}
		} /* if ((c = write(1, Bootsect, (unsigned)sectsiz)) */
			/* != sectsiz) */
	} /* while (--io_size); */
	exit(0);
}

/*
 * abs_write
 * Read the data from standard input. Write to the disk at
 * absolute relative block io_offset for io_size blocks (-w).
 */
abs_write()
{
	int c, i;

	while (io_size--) {
		int part_exit = 0;
		/* Read from standard input */
		if ((c = read(0, Bootsect, (unsigned)sectsiz)) != sectsiz) {
			if (c >= 0) {
				if (io_debug)
				fprintf(stderr,
				    "fdisk: WARNING: Incomplete read (%d of"
				    " %d characters read) on input file.\n",
					c, sectsiz);
				/* Fill pattern to mark partial sector in buf */
				for (i = c; i < sectsiz; ) {
					Bootsect[i++] = 0x41;
					Bootsect[i++] = 0x62;
					Bootsect[i++] = 0x65;
					Bootsect[i++] = 0;
				}
				part_exit++;
			} else {
				perror("read error on input file.");
				exit(2);
			}

		}
		/* Write to disk drive */
		if (lseek(Dev, sectsiz * io_offset++, SEEK_SET) == -1) {
			fprintf(stderr, "fdisk: Error seeking on %s.\n",
			    Dfltdev);
			exit(1);
		}
		if (write(Dev, Bootsect, sectsiz) != sectsiz) {
			fprintf(stderr, "fdisk: Error writing %s.\n",
			    Dfltdev);
			exit(1);
		}
		if (part_exit)
		exit(0);
	} /* while (--io_size); */
	exit(1);
}

/*
 * load
 * Load will either read the fdisk table from a file or add or
 * delete an entry (-A, -D, -F).
 */

load(funct, file)
int	funct;
char	*file;			/* Either file name or delete/add line */
{
	int	id;
	int	act;
	int	bhead;
	int	bsect;
	int	bcyl;
	int	ehead;
	int	esect;
	int	ecyl;
	int	rsect;
	int	numsect;
	char	line[256];
	int	i = 0;
	int	j;
	FILE *fp;

	switch (funct) {

	    case LOADFILE:

		/*
		 * Zero out the table before loading it, which will
		 * force it to be updated on disk later (-F
		 * fdisk_file).
		 */
		nulltbl();

		/* Open the prototype file */
		if ((fp = fopen(file, "r")) == NULL) {
			(void) fprintf(stderr,
			    "fdisk: Cannot open prototype partition file %s.\n",
			    file);
			exit(1);
		}

		/* Read a line from the file */
		while (fgets(line, sizeof (line) - 1, fp)) {
			if (pars_fdisk(line, &id, &act, &bhead, &bsect,
			    &bcyl, &ehead, &esect, &ecyl, &rsect, &numsect)) {
				continue;
			}

			/*
			 * Validate the partition. It cannot start at sector
			 * 0 unless it is UNUSED or already exists
			 */
			if (validate_part(id, rsect, numsect) < 0) {
				(void) fprintf(stderr,
				    "fdisk: Error on entry \"%s\".\n",
				    line);
				exit(1);
			}
			/*
			 * Find an unused entry to use and put the entry
			 * in table
			 */
			if (insert_tbl(id, act, bhead, bsect, bcyl, ehead,
			    esect, ecyl, rsect, numsect) < 0) {
				(void) fprintf(stderr,
				    "fdisk: Error on entry \"%s\".\n",
				    line);
				exit(1);
			}
		} /* while (fgets(line, sizeof (line) - 1, fp)) */

		if (verify_tbl() < 0) {
			fprintf(stderr,
			    "fdisk: Cannot create partition table\n");
			exit(1);
		}

		fclose(fp);
		return;

	    case LOADDEL:

		/* Parse the user-supplied deletion line (-D) */
		pars_fdisk(file, &id, &act, &bhead, &bsect, &bcyl, &ehead,
		    &esect, &ecyl, &rsect, &numsect);

		/* Find the exact entry in the table */
		for (i = 0; i < FD_NUMPART; i++) {
			if (Table[i].systid == id &&
			    Table[i].bootid == act &&
			    Table[i].beghead == bhead &&
			    Table[i].begsect == ((bsect & 0x3f) |
				(unsigned char)((bcyl>>2) & 0xc0)) &&
			    Table[i].begcyl == (unsigned char)(bcyl & 0xff) &&
			    Table[i].endhead == ehead &&
			    Table[i].endsect == ((esect & 0x3f) |
				(unsigned char)((ecyl>>2) & 0xc0)) &&
			    Table[i].endcyl == (unsigned char)(ecyl & 0xff) &&
			    Table[i].relsect == lel(rsect) &&
			    Table[i].numsect == lel(numsect)) {

				/*
				 * Found the entry. Now move rest of
				 * entries up toward the top of the
				 * table, leaving available entries at
				 * the end of the fdisk table.
				 */
				for (j = i; j < FD_NUMPART-1; j++) {
					Table[j].systid = Table[j+1].systid;
					Table[j].bootid = Table[j+1].bootid;
					Table[j].beghead = Table[j+1].beghead;
					Table[j].begsect = Table[j+1].begsect;
					Table[j].begcyl = Table[j+1].begcyl;
					Table[j].endhead = Table[j+1].endhead;
					Table[j].endsect = Table[j+1].endsect;
					Table[j].endcyl = Table[j+1].endcyl;
					Table[j].relsect = Table[j+1].relsect;
					Table[j].numsect = Table[j+1].numsect;
				}

				/*
				 * Mark the last entry as unused in case
				 * all table entries were in use prior
				 * to the deletion.
				 */

				Table[FD_NUMPART-1].systid = UNUSED;
				Table[FD_NUMPART-1].bootid = 0;
				return;
			}
		}
		fprintf(stderr,
		    "fdisk: Entry does not match any existing partition:\n"
		    "	\"%s\"\n",
		    file);
		exit(1);

	    case LOADADD:

		/* Parse the user-supplied addition line (-A) */
		pars_fdisk(file, &id, &act, &bhead, &bsect, &bcyl, &ehead,
		    &esect, &ecyl, &rsect, &numsect);

		/* Validate the partition. It cannot start at sector 0 */
		if (rsect == 0) {
			(void) fprintf(stderr,
			    "fdisk: New partition cannot start at sector 0:\n"
			    "   \"%s\".\n",
			    file);
			exit(1);
		}

		/*
		 * if the user wishes to add an EFI partition, we need
		 * more extensive validation.  rsect should be 1, and
		 * numsect should equal the entire disk capacity - 1
		 */

		if (id == EFI_PMBR) {
			if (rsect != 1) {
				(void) fprintf(stderr,
				    "fdisk: EFI partitions must start at sector"
				    " 1 (input rsect = %d)\n", rsect);
				exit(1);
			}

			if (numsect != ((Numcyl * heads * sectors) -1)) {
				(void) fprintf(stderr,
				    "fdisk: EFI partitions must encompass the "
				    "entire disk\n (input numsect: %ld - avail:"
				    " %ld)\n", numsect,
				    ((Numcyl * heads * sectors) -1));
				exit(1);
			}
		}

		/* Find unused entry for use and put entry in table */
		if (insert_tbl(id, act, bhead, bsect, bcyl, ehead, esect,
		    ecyl, rsect, numsect) < 0) {
			(void) fprintf(stderr,
			    "fdisk: Invalid entry could not be inserted:\n"
			    "	\"%s\"\n",
			    file);
			exit(1);
		}

		/* Make sure new entry does not overlap existing entry */
		if (verify_tbl() < 0) {
			fprintf(stderr,
			    "fdisk: Cannot create partition \"%s\",\n");
			exit(1);
		}
	} /* switch funct */
}

/*
 * Set_Table_CHS_Values
 *
 * This will calculate the CHS values for beginning and ending CHS
 * for a single partition table entry (ti) based on the relsect
 * and numsect values contained in the partion table entry.
 *
 * hba_heads and hba_sectors contain the number of heads and sectors.
 *
 * If the number of cylinders exceeds the MAX_CYL,
 * then maximum values will be placed in the corresponding chs entry.
 */
static void
Set_Table_CHS_Values(int ti)
{
	uint32_t	lba, cy, hd, sc;

	lba = (uint32_t)Table[ti].relsect;
	if (lba >= hba_heads * hba_sectors * MAX_CYL) {
		/*
		 * the lba address cannot be expressed in CHS value
		 * so store the maximum CHS field values in the CHS fields.
		 */
		cy = MAX_CYL + 1;
		hd = MAX_HEAD;
		sc = MAX_SECT;
	} else {
		cy = lba / hba_sectors / hba_heads;
		hd = lba / hba_sectors % hba_heads;
		sc = lba % hba_sectors + 1;
	}
	Table[ti].begcyl = cy & 0xff;
	Table[ti].beghead = hd;
	Table[ti].begsect = ((cy >> 2) & 0xc0) | sc;

	/*
	 * This code is identical to the code above
	 * except that it works on ending CHS values
	 */
	lba = (uint32_t)(Table[ti].relsect + Table[ti].numsect - 1);
	if (lba >= hba_heads * hba_sectors * MAX_CYL) {
		cy = MAX_CYL + 1;
		hd = MAX_HEAD;
		sc = MAX_SECT;
	} else {
		cy = lba / hba_sectors / hba_heads;
		hd = lba / hba_sectors % hba_heads;
		sc = lba % hba_sectors + 1;
	}
	Table[ti].endcyl = cy & 0xff;
	Table[ti].endhead = hd;
	Table[ti].endsect = ((cy >> 2) & 0xc0) | sc;
}

/*
 * insert_tbl
 * 	Insert entry into fdisk table. Check all user-supplied values
 *	for the entry, but not the validity relative to other table
 *	entries!
 */
insert_tbl(id, act, bhead, bsect, bcyl, ehead, esect, ecyl, rsect, numsect)
int	id, act, bhead, bsect, bcyl, ehead, esect, ecyl, rsect, numsect;
{
	int	i;

	/* validate partition size */
	if (rsect+numsect > (Numcyl * heads * sectors)) {
		fprintf(stderr,
		    "fdisk: Partition table exceeds the size of the disk.\n");
		return (-1);
	}

	/* find UNUSED partition table entry */
	for (i = 0; i < FD_NUMPART; i++) {
		if (Table[i].systid == UNUSED) {
			break;
		}
	}
	if (i >= FD_NUMPART) {
		fprintf(stderr, "fdisk: Partition table is full.\n");
		return (-1);
	}


	Table[i].systid = id;
	Table[i].bootid = act;
	Table[i].numsect = lel(numsect);
	Table[i].relsect = lel(rsect);

	/*
	 * If we have been called with a valid geometry, use it
	 * valid means non-zero values that fit in the BIOS fields
	 */
	if (0 < bsect && bsect <= MAX_SECT &&
	    0 <= bhead && bhead <= MAX_HEAD &&
	    0 < esect && esect <= MAX_SECT &&
	    0 <= ehead && ehead <= MAX_HEAD) {
		if (bcyl > MAX_CYL)
			bcyl = MAX_CYL + 1;
		if (ecyl > MAX_CYL)
			ecyl = MAX_CYL + 1;
		Table[i].begcyl = bcyl & 0xff;
		Table[i].endcyl = ecyl & 0xff;
		Table[i].beghead = bhead;
		Table[i].endhead = ehead;
		Table[i].begsect = ((bcyl >> 2) & 0xc0) | bsect;
		Table[i].endsect = ((ecyl >> 2) & 0xc0) | esect;
	} else {

		/*
		 * The specified values are invalid,
		 * so calculate the values based on hba_heads, hba_sectors
		 */
		Set_Table_CHS_Values(i);
	}

	/*
	 * return partition index
	 */
	return (i);
}

/*
 * verify_tbl
 * Verify that no partition entries overlap or exceed the size of
 * the disk.
 */
int
verify_tbl()
{
	int	i, j, rsect, numsect;
	int	noMoreParts = 0;
	int	numParts = 0;

	/* Make sure new entry does not overlap an existing entry */
	for (i = 0; i < FD_NUMPART-1; i++) {
		if (Table[i].systid != UNUSED) {
			numParts++;
			/*
			 * No valid partitions allowed after an UNUSED  or
			 * EFI_PMBR part
			 */
			if (noMoreParts) {
				return (-1);
			}

			/*
			 * EFI_PMBR partitions must be the only partition
			 * and must be Table entry 0
			 */
			if (Table[i].systid == EFI_PMBR) {
				if (i == 0) {
					noMoreParts = 1;
				} else {
					return (-1);
				}

				if (Table[i].relsect != 1) {
					fprintf(stderr, "ERROR: "
					    "Invalid starting sector "
					    "for EFI_PMBR partition:\n"
					    "relsect %d "
					    "(should be 1)\n",
					    Table[i].relsect);

					return (-1);
				}

				if (Table[i].numsect !=
				    ((Numcyl * heads * sectors) - 1)) {
					fprintf(stderr, "ERROR: "
					    "EFI_PMBR partition must "
					    "encompass the entire "
					    "disk.\n numsect %ld - "
					    "actual %ld\n",
					    Table[i].numsect,
					    ((Numcyl * heads * sectors) - 1));

					return (-1);
				}
			}

			/* make sure the partition isn't larger than the disk */
			rsect = lel(Table[i].relsect);
			numsect = lel(Table[i].numsect);
			if ((rsect + numsect) > (Numcyl * heads * sectors)) {
				return (-1);
			}

			for (j = i+1; j < FD_NUMPART; j++) {
				if (Table[j].systid != UNUSED) {
					int t_relsect = lel(Table[j].relsect);
					int t_numsect = lel(Table[j].numsect);

					if (noMoreParts) {
						fprintf(stderr,
						    "Cannot add partition to "
						    "table; no more partitions "
						    "allowed\n");

						if (io_debug) {
							fprintf(stderr,
							    "DEBUG: Current "
							    "partition:\t"
							    "%d:%d:%d:%d:%d:"
							    "%d:%d:%d:%d:%ld\n"
							    "       Next "
							    "partition:\t\t"
							    "%d:%d:%d:%d:%d:"
							    "%d:%d:%d:%d:%ld\n",
							    Table[i].systid,
							    Table[i].bootid,
							    Table[i].begcyl,
							    Table[i].beghead,
							    Table[i].begsect,
							    Table[i].endcyl,
							    Table[i].endhead,
							    Table[i].endsect,
							    Table[i].relsect,
							    Table[i].numsect,
							    Table[j].systid,
							    Table[j].bootid,
							    Table[j].begcyl,
							    Table[j].beghead,
							    Table[j].begsect,
							    Table[j].endcyl,
							    Table[j].endhead,
							    Table[j].endsect,
							    Table[j].relsect,
							    Table[j].numsect);
						}

						return (-1);
					}

					if ((rsect >=
					    (t_relsect + t_numsect)) ||
					    ((rsect+numsect) <= t_relsect)) {
						continue;
					} else {
						fprintf(stderr, "ERROR: "
						    "current partition overlaps"
						    " following partition\n");

						return (-1);
					}
				}
			}
		} else {
			noMoreParts = 1;
		}
	}
	if (Table[i].systid != UNUSED) {
		if (noMoreParts ||
		    ((lel(Table[i].relsect) + lel(Table[i].numsect)) >
		    (Numcyl * heads * sectors))) {
			return (-1);
		}
	}

	return (numParts);
}

/*
 * pars_fdisk
 * Parse user-supplied data to set up fdisk partitions
 * (-A, -D, -F).
 */
pars_fdisk(line, id, act, bhead, bsect, bcyl, ehead, esect, ecyl,
	rsect, numsect)
char *line;
char *id, *act, *bhead, *bsect, *bcyl, *ehead, *esect, *ecyl, *rsect;
char *numsect;
{
	int	i;
	if (line[0] == '\0' || line[0] == '\n' || line[0] == '*')
	    return (1);
	line[strlen(line)] = '\0';
	for (i = 0; i < strlen(line); i++) {
		if (line[i] == '\0') {
			break;
		} else if (line[i] == ':') {
			line[i] = ' ';
		}
	}
	if (sscanf(line, "%d %d %d %d %d %d %d %d %ld %ld",
	    id, act, bhead, bsect, bcyl, ehead, esect, ecyl,
	    rsect, numsect) != 10) {
		(void) fprintf(stderr, "Syntax error:\n	\"%s\".\n", line);
		exit(1);
	}
	return (0);
}

/*
 * validate_part
 * Validate that a new partition does not start at sector 0. Only UNUSED
 * partitions and previously existing partitions are allowed to start at 0.
 */
validate_part(id, rsect, numsect)
int id, rsect, numsect;
{
	int i;
	if ((id != UNUSED) && (rsect == 0)) {
		for (i = 0; i < FD_NUMPART; i++) {
			if ((Old_Table[i].systid == id) &&
			    (Old_Table[i].relsect == lel(rsect)) &&
			    (Old_Table[i].numsect == lel(numsect))) return (0);
		}
		fprintf(stderr, "New partition cannot start at sector 0\n");
		return (-1);
	}
	return (0);
}

/*
 * stage0
 * Print out interactive menu and process user input.
 */
stage0(file)
char *file;
{
	dispmenu(file);
	while (1) {
		printf(Q_LINE);
		printf("Enter Selection: ");
		gets(s);
		rm_blanks(s);
		while (!((s[0] > '0') && (s[0] < '7') && (s[1] == 0))) {
			printf(E_LINE); /* Clear any previous error */
			printf("Enter a one-digit number between 1 and 6.");
			printf(Q_LINE);
			printf("Enter Selection: ");
			gets(s);
			rm_blanks(s);
		}
		printf(E_LINE);
		switch (s[0]) {
			case '1':
				if (pcreate() == -1)
					return;
				break;
			case '2':
				if (pchange() == -1)
					return;
				break;
			case '3':
				if (pdelete() == -1)
					return;
				break;
			case '4':
				if (ppartid() == -1)
					return;
				break;
			case '5':
				/* update disk partition table, if changed */
				if (TableChanged() == 1) {
					copy_Table_to_Bootblk();
					dev_mboot_write(0, Bootsect, sectsiz);
				}
				/*
				 * If the VTOC table is wrong fix it
				 * (truncate only)
				 */
				if (io_adjt) {
					fix_slice();
				}
				close(Dev);
				exit(0);
			case '6':
				/*
				 * If the VTOC table is wrong fix it
				 * (truncate only)
				 */
				if (io_adjt) {
					fix_slice();
				}
				close(Dev);
				exit(0);
			default:
				break;
		}
		copy_Table_to_Bootblk();
		disptbl();
		dispmenu(file);
	}
}

/*
 * pcreate
 * Create partition entry in the table (interactive mode).
 */
pcreate()
{
	unsigned char tsystid = 'z';
	int i, j;
	int startcyl, endcyl;
	int rsect = 1;
	int retCode = 0;

	i = 0;
	while (1) {
		if (i == FD_NUMPART) {
			printf(E_LINE);
			printf("The partition table is full!\n");
			printf("You must delete a partition before creating"
			    " a new one.\n");
			return (-1);
		}
		if (Table[i].systid == UNUSED) {
			break;
		}
		i++;
	}

	j = 0;
	for (i = 0; i < FD_NUMPART; i++) {
		if (Table[i].systid != UNUSED) {
			j += lel(Table[i].numsect);
		}
		if (j >= Numcyl * heads * sectors) {
			printf(E_LINE);
			printf("There is no more room on the disk for"
			    " another partition.\n");
			printf("You must delete a partition before creating"
			    " a new one.\n");
			return (-1);
		}
	}
	while (tsystid == 'z') {
		printf(Q_LINE);
		printf("Select the partition type to create:\n");
		printf("   1=SOLARIS2  2=UNIX        3=PCIXOS     4=Other\n");
		printf("   5=DOS12     6=DOS16       7=DOSEXT     8=DOSBIG\n");
		printf("   9=DOS16LBA  A=x86 Boot    B=Diagnostic C=FAT32\n");
		printf("   D=FAT32LBA  E=DOSEXTLBA   F=EFI        0=Exit? ");
		gets(s);
		rm_blanks(s);
		if (s[1] != 0) {
			printf(E_LINE);
			printf("Invalid selection, try again.");
			continue;
		}
		switch (s[0]) {
		case '0':		/* exit */
		    printf(E_LINE);
		    return (-1);
		case '1':		/* Solaris partition */
		    tsystid = SUNIXOS2;
		    break;
		case '2':		/* UNIX partition */
		    tsystid = UNIXOS;
		    break;
		case '3':		/* PCIXOS partition */
		    tsystid = PCIXOS;
		    break;
		case '4':		/* OTHEROS System partition */
		    tsystid = OTHEROS;
		    break;
		case '5':
		    tsystid = DOSOS12; /* DOS 12 bit fat */
		    break;
		case '6':
		    tsystid = DOSOS16; /* DOS 16 bit fat */
		    break;
		case '7':
		    tsystid = EXTDOS;
		    break;
		case '8':
		    tsystid = DOSHUGE;
		    break;
		case '9':
		    tsystid = FDISK_FAT95;  /* FAT16, need extended int13 */
		    break;
		case 'a':		/* x86 Boot partition */
		case 'A':
		    tsystid = X86BOOT;
		    break;
		case 'b':		/* Diagnostic boot partition */
		case 'B':
		    tsystid = DIAGPART;
		    break;
		case 'c':		/* FAT32 */
		case 'C':
		    tsystid = FDISK_WINDOWS;
		    break;
		case 'd':		/* FAT32 and need extended int13 */
		case 'D':
		    tsystid = FDISK_EXT_WIN;
		    break;
		case 'e':	/* Extended partition, need extended int13 */
		case 'E':
		    tsystid = FDISK_EXTLBA;
		    break;
		case 'f':
		case 'F':
		    tsystid = EFI_PMBR;
		    break;
		default:
		    printf(E_LINE);
		    printf("Invalid selection, try again.");
		    continue;
		}
	}

	printf(E_LINE);

	if (tsystid != EFI_PMBR) {
		/* create the new partition */
		i = specify(tsystid);

		if (i != -1) {
			/* see if it should be the active partition */
			printf(E_LINE);
			printf(Q_LINE);

			printf("Should this become the active partition? If "
			    "yes, it  will be activated\n");
			printf("each time the computer is reset or turned "
			    "on.\n");
			printf("Please type \"y\" or \"n\". ");

			if (yesno()) {
				printf(E_LINE);
				for (j = 0; j < FD_NUMPART; j++) {
					if (j == i) {
						Table[j].bootid = ACTIVE;
						printf(E_LINE);
						printf("Partition %d is now "
						    "the active partition.",
						    j+1);
					} else {
						Table[j].bootid = 0;
					}
				}
			} else {
				Table[i].bootid = 0;
			}

			/* set up the return code */
			i = 1;
		}
	} else {
		/*
		 * partitions of type EFI_PMBR must be the only partitions in
		 * the table
		 *
		 * First, make sure there were no errors the table is
		 * empty
		 */
		retCode = verify_tbl();

		if (retCode < 0) {
			fprintf(stderr,
			    "fdisk: Cannot create EFI partition table; \n"
			    "current partition table is invalid.\n");
			return (-1);
		} else if (retCode > 0) {
			printf("An EFI partition must be the only partition on "
				"disk.  You may manually delete existing\n"
				"partitions, or fdisk can do it.\n");
			printf("Do you want fdisk to destroy existing "
				"partitions?\n");
			printf("Please type \"y\" or \"n\". ");

			if (yesno()) {
				nulltbl();
			} else {
				return (-1);
			}
		}

		/* create the table entry - i should be 0 */
		i = insert_tbl(tsystid, 0, 0, 0, 0, 0, 0, 0, rsect,
			(Numcyl * heads * sectors) - rsect);

		if (i != 0) {
			printf("Error creating EFI partition!!!\n");
			i = -1;
		} else {

			/* EFI partitions are currently never active */
			Table[i].bootid = 0;

			/* set up the return code */
			i = 1;
		}
	}

	return (i);
}

/*
 * specify
 * Query the user to specify the size of the new partition in
 * terms of percentage of the disk or by specifying the starting
 * cylinder and length in cylinders.
 */
specify(tsystid)
unsigned char	tsystid;
{
	int	i, j,
		percent = -1;
	int	cyl, cylen, first_free, size_free;
	struct ipart *partition[FD_NUMPART];

	printf(Q_LINE);
	printf("Specify the percentage of disk to use for this partition\n");
	printf("(or type \"c\" to specify the size in cylinders). ");
	gets(s);
	rm_blanks(s);
	if (s[0] != 'c') {	/* Specify size in percentage of disk */
	    i = 0;
	    while (s[i] != '\0') {
		if (s[i] < '0' || s[i] > '9') {
		    printf(E_LINE);
		    printf("Invalid percentage value specified; retry"
			" the operation.");
		    return (-1);
		}
		i++;
		if (i > 3) {
		    printf(E_LINE);
		    printf("Invalid percentage value specified; retry"
			" the operation.");
		    return (-1);
		}
	    }
	    if ((percent = atoi(s)) > 100) {
		printf(E_LINE);
		printf("Percentage value is too large. The value must be"
		    " between 1 and 100;\nretry the operation.\n");
		return (-1);
	    }
	    if (percent < 1) {
		printf(E_LINE);
		printf("Percentage value is too small. The value must be"
		    " between 1 and 100;\nretry the operation.\n");
		return (-1);
	    }

	    cylen = (Numcyl * percent) / 100;
	    if ((percent < 100) && (((Numcyl * percent) % 10) > 5))
		cylen++;

	    /* Verify that the DOS12 partition does not exceed the maximum */
	    /* size of 32MB. */
	    if ((tsystid == DOSOS12) && ((long)((long)cylen*heads*sectors) >
		MAXDOS)) {
		int n;
		n = (int)(MAXDOS*100/(int)(heads*sectors)/Numcyl);
		printf(E_LINE);
		printf("Maximum size for a DOS partition is %d%%;"
		    " retry the operation.",
		    n <= 100 ? n : 100);
		return (-1);
	    }

	    /* Before searching the partitions, sort them into sector order */
	    /* in the partition array, note that we only need to sort */
	    /* NUMPART-1 entries as at least the last one must be empty */
	    for (i = 0; i < FD_NUMPART; i++) partition[i] = &Table[i];

	    for (i = 0; i < FD_NUMPART-2; i++) {
		if (partition[i]->systid == UNUSED) break;
		for (j = i+1; j < FD_NUMPART-1; j++) {
		    if (partition[j]->systid == UNUSED) break;
		    if (lel(partition[j]->relsect) <
				lel(partition[i]->relsect)) {
			struct ipart *temp = partition[i];
			partition[i] = partition[j];
			partition[j] = temp;
		    }
		}
	    }

	    for (i = 0; i < FD_NUMPART; i++) {
		    int last_ent = 0;

		    /* Find start of current check area */
		    if (i) { /* Not an empty table */
			    first_free = lel(partition[i-1]->relsect) +
				lel(partition[i-1]->numsect);
		    } else {
			    first_free = heads * sectors;
		    }

		    /* Determine size of current check area */
		    if (partition[i]->systid == UNUSED) {
			    /* Special case hack for whole unused disk */
			    if (percent == 100 && i == 0)
				cylen--;
			    size_free = (Numcyl*heads*sectors) - first_free;
			    last_ent++;
		    } else {
			    if (i && ((lel(partition[i-1]->relsect) +
				lel(partition[i-1]->numsect)) !=
				lel(partition[i]->relsect))) {
				    /* There is a hole in table */
				    size_free = lel(partition[i]->relsect) -
					(lel(partition[i-1]->relsect) +
					lel(partition[i-1]->numsect));
			    } else if (i == 0) {
				    size_free = lel(partition[i]->relsect) -
					heads*sectors;
			    } else {
				    size_free = 0;
			    }
		    }

		    if ((cylen*heads*sectors) <= size_free) {
			    /* We found a place to use */
			    break;
		    } else if (last_ent) {
			    size_free = 0;
			    break;
		    }
	    }
	    if (i < FD_NUMPART && size_free) {
		    printf(E_LINE);
		    if ((i = insert_tbl(tsystid, 0, 0, 0, 0, 0, 0, 0,
			first_free, cylen*heads*sectors)) < 0)  {
			    fprintf(stderr,
				"fdisk: Partition entry too big.\n");
			    return (-1);
		    }
	    } else {
		    printf(E_LINE);
		    fprintf(stderr, "fdisk: Partition entry too big.\n");
		    i = -1;
	    }
	    return (i);
	} else {	/* Specifying size in cylinders */

	    printf(E_LINE);
	    printf(Q_LINE);
	    printf("Enter starting cylinder number: ");
	    if ((cyl = getcyl()) == -1) {
		printf(E_LINE);
		printf("Invalid number; retry the operation.");
		return (-1);
	    }
	    if (cyl == 0) {
		printf(E_LINE);
		printf("New partition cannot start at cylinder 0.\n");
		return (-1);
	    }
	    if (cyl >= (unsigned int)Numcyl) {
		printf(E_LINE);
		printf("Cylinder %d is out of bounds, the maximum is %d.\n",
		    cyl, Numcyl - 1);
		return (-1);
	    }
	    printf(Q_LINE);
	    printf("Enter partition size in cylinders: ");
	    if ((cylen = getcyl()) == -1) {
		printf(E_LINE);
		printf("Invalid number, retry the operation.");
		return (-1);
	    }

	    /* Verify that the DOS12 partition does not exceed the maximum */
	    /* size of 32MB. */
	    if ((tsystid == DOSOS12) &&
		((long)((long)cylen*heads*sectors) > MAXDOS)) {
		printf(E_LINE);
		printf("Maximum size for a %s partition is %ld cylinders;"
		    "\nretry the operation.",
		    Dstr, MAXDOS/(int)(heads*sectors));
		return (-1);
	    }

	    i = insert_tbl(tsystid, 0, 0, 0, 0, 0, 0, 0, cyl*heads*sectors,
		cylen*heads*sectors);

	    if (verify_tbl() < 0) {
		printf(E_LINE);
		printf("fdisk: Cannot create partition table\n");
		return (-1);
	    }

	    return (i);
	}
}

/*
 * dispmenu
 * Display command menu (interactive mode).
 */
dispmenu(file)
char *file;
{
	printf(M_LINE);
	printf("SELECT ONE OF THE FOLLOWING:\n");
	printf("   1. Create a partition\n");
	printf("   2. Specify the active partition\n");
	printf("   3. Delete a partition\n");
	printf("   4. Change between Solaris and Solaris2 Partition IDs\n");
	printf("   5. Exit (update disk configuration and exit)\n");
	printf("   6. Cancel (exit without updating disk configuration)\n");
}

/*
 * pchange
 * Change the ACTIVE designation of a partition.
 */
pchange()
{
	char s[80];
	int i, j;

	while (1) {
		printf(Q_LINE);
			{
			printf("Specify the partition number to boot from"
			    " (or specify 0 for none): ");
			}
		gets(s);
		rm_blanks(s);
		if ((s[1] != 0) || (s[0] < '0') || (s[0] > '4')) {
			printf(E_LINE);
			printf("Invalid response, please specify a number"
			    " between 0 and 4.\n");
		} else {
			break;
		}
	}
	if (s[0] == '0') {	/* No active partitions */
		for (i = 0; i < FD_NUMPART; i++) {
			if (Table[i].systid != UNUSED &&
			    Table[i].bootid == ACTIVE)
				Table[i].bootid = 0;
		}
		printf(E_LINE);
			printf("No partition is currently marked as active.");
		return (0);
	} else {	/* User has selected a partition to be active */
		i = s[0] - '1';
		if (Table[i].systid == UNUSED) {
			printf(E_LINE);
			printf("Partition does not exist.");
			return (-1);
		}
		/* a DOS-DATA or EXT-DOS partition cannot be active */
		else if ((Table[i].systid == DOSDATA) ||
		    (Table[i].systid == EXTDOS) ||
		    (Table[i].systid == FDISK_EXTLBA)) {
			printf(E_LINE);
			printf("DOS-DATA, EXT_DOS and EXT_DOS_LBA partitions "
			    "cannot be made active.\n");
			printf("Select another partition.");
			return (-1);
		}
		Table[i].bootid = ACTIVE;
		for (j = 0; j < FD_NUMPART; j++) {
			if (j != i)
			Table[j].bootid = 0;
		}
	}
	printf(E_LINE);
		{
		printf("Partition %d is now active. The system will start up"
		    " from this\n", i+1);
		printf("partition after the next reboot.");
		}
	return (1);
}

/*
 * Change between SOLARIS and SOLARIS2 partition id
 */
ppartid()
{
	char	*p, s[80];
	int	i;

	for (;;) {
		printf(Q_LINE);
		printf("Specify the partition number to change"
			" (or enter 0 to exit): ");
		fgets(s, sizeof (s), stdin);
		i = strtol(s, &p, 10);

		if (*p != '\n' || i < 0 || i > FD_NUMPART) {
			printf(E_LINE);
			printf("Invalid response, retry the operation.\n");
			continue;
		}

		if (i == 0) {
			/* exit delete command */
			printf(E_LINE); /* clear error message */
			return (1);
		}

		i -= 1;
		if (Table[i].systid == SUNIXOS) {
			Table[i].systid = SUNIXOS2;
		} else if (Table[i].systid == SUNIXOS2) {
			Table[i].systid = SUNIXOS;
		} else {
			printf(E_LINE);
			printf("Partition %d is not a Solaris partition.",
			    i + 1);
			continue;
		}

		printf(E_LINE);
		printf("Partition %d has been changed.", i + 1);
		return (1);
	}
}

/*
 * pdelete
 * Remove partition entry from the table (interactive mode).
 */
pdelete()
{
	char s[80];
	int i, j;
	char pactive;

DEL1:	printf(Q_LINE);
	printf("Specify the partition number to delete"
	    " (or enter 0 to exit): ");
	gets(s);
	rm_blanks(s);
	if ((s[0] == '0')) {	/* exit delete command */
		printf(E_LINE);	/* clear error message */
		return (1);
	}
	/* Accept only a single digit between 1 and 4 */
	if (s[1] != 0 || (i = atoi(s)) < 1 || i > FD_NUMPART) {
		printf(E_LINE);
		printf("Invalid response, retry the operation.\n");
		goto DEL1;
	} else {		/* Found a digit between 1 and 4 */
		--i;	/* Structure begins with element 0 */
	}

	if (Table[i].systid == UNUSED) {
		printf(E_LINE);
		printf("Partition %d does not exist.", i+1);
		return (-1);
	}

	printf(Q_LINE);
	printf("Are you sure you want to delete partition %d?"
	    " This will make all files and \n", i+1);
	printf("programs in this partition inaccessible (type"
	    " \"y\" or \"n\"). ");

	printf(E_LINE);
	if (! yesno()) {
		return (1);
	}

	if (Table[i].bootid == ACTIVE) {
		pactive = 1;
	} else {
		pactive = 0;
	}

	for (j = i; j < FD_NUMPART - 1; j++) {
	    Table[j] = Table[j+1];
	}

	Table[j].systid = UNUSED;
	Table[j].numsect = 0;
	Table[j].relsect = 0;
	Table[j].bootid = 0;
	printf(E_LINE);
	printf("Partition %d has been deleted.", i+1);

	if (pactive) {
	    printf(" This was the active partition.");
	}

	return (1);
}

/*
 * rm_blanks
 * Remove blanks from strings of user responses.
 */
rm_blanks(s)
char *s;
{
	register int i, j;

	for (i = 0; i < CBUFLEN; i++) {
		if ((s[i] == ' ') || (s[i] == '\t'))
			continue;
		else
			/* Found first non-blank character of the string */
			break;
	}
	for (j = 0; i < CBUFLEN; j++, i++) {
		if ((s[j] = s[i]) == '\0') {
			/* Reached end of string */
			return;
		}
	}
}

/*
 * getcyl
 * Take the user-specified cylinder number and convert it from a
 * string to a decimal value.
 */
getcyl()
{
int slen, i, j;
unsigned int cyl;
	gets(s);
	rm_blanks(s);
	slen = strlen(s);
	j = 1;
	cyl = 0;
	for (i = slen-1; i >= 0; i--) {
		if (s[i] < '0' || s[i] > '9') {
			return (-1);
		}
		cyl += (j*(s[i]-'0'));
		j *= 10;
	}
	return (cyl);
}

/*
 * disptbl
 * Display the current fdisk table; determine percentage
 * of the disk used for each partition.
 */
disptbl()
{
	int i;
	unsigned int startcyl, endcyl, length, percent, remainder;
	char *stat, *type;
	unsigned char *t;

	if ((heads == 0) || (sectors == 0)) {
		printf("WARNING: critical disk geometry information"
			" missing!\n");
		printf("\theads = %d, sectors = %d\n", heads, sectors);
		exit(1);
	}

	printf(HOME);
	printf(T_LINE);
	printf("             Total disk size is %d cylinders\n", Numcyl);
	printf("             Cylinder size is %d (512 byte) blocks\n\n",
	    heads*sectors);
	printf("                                               Cylinders\n");
	printf("      Partition   Status    Type          Start   End   Length"
	    "    %%\n");
	printf("      =========   ======    ============  =====   ===   ======"
	    "   ===");
	for (i = 0; i < FD_NUMPART; i++) {
		if (Table[i].systid == UNUSED) {
			printf("\n");
			printf(CLR_LIN);
			continue;
		}
		if (Table[i].bootid == ACTIVE)
		    stat = Actvstr;
		else
		    stat = NAstr;
		switch (Table[i].systid) {
		case UNIXOS:
		    type = Ustr;
		    break;
		case SUNIXOS:
		    type = SUstr;
		    break;
		case SUNIXOS2:
		    type = SU2str;
		    break;
		case X86BOOT:
		    type = X86str;
		    break;
		case DOSOS12:
		    type = Dstr;
		    break;
		case DOSOS16:
		    type = D16str;
		    break;
		case EXTDOS:
		    type = EDstr;
		    break;
		case DOSDATA:
		    type = DDstr;
		    break;
		case DOSHUGE:
		    type = DBstr;
		    break;
		case PCIXOS:
		    type = PCstr;
		    break;
		case DIAGPART:
		    type = DIAGstr;
		    break;
		case FDISK_IFS:
		    type = IFSstr;
		    break;
		case FDISK_AIXBOOT:
		    type = AIXstr;
		    break;
		case FDISK_AIXDATA:
		    type = AIXDstr;
		    break;
		case FDISK_OS2BOOT:
		    type = OS2str;
		    break;
		case FDISK_WINDOWS:
		    type = WINstr;
		    break;
		case FDISK_EXT_WIN:
		    type = EWINstr;
		    break;
		case FDISK_FAT95:
		    type = FAT95str;
		    break;
		case FDISK_EXTLBA:
		    type = EXTLstr;
		    break;
		case FDISK_LINUX:
		    type = LINUXstr;
		    break;
		case FDISK_CPM:
		    type = CPMstr;
		    break;
		case FDISK_NOVELL3:
		    type = NOVstr;
		    break;
		case FDISK_QNX4:
		    type = QNXstr;
		    break;
		case FDISK_QNX42:
		    type = QNX2str;
		    break;
		case FDISK_QNX43:
		    type = QNX3str;
		    break;
		case FDISK_LINUXNAT:
		    type = LINNATstr;
		    break;
		case FDISK_NTFSVOL1:
		    type = NTFSVOL1str;
		    break;
		case FDISK_NTFSVOL2:
		    type = NTFSVOL2str;
		    break;
		case FDISK_BSD:
		    type = BSDstr;
		    break;
		case FDISK_NEXTSTEP:
		    type = NEXTSTEPstr;
		    break;
		case FDISK_BSDIFS:
		    type = BSDIFSstr;
		    break;
		case FDISK_BSDISWAP:
		    type = BSDISWAPstr;
		    break;
		case EFI_PMBR:
		    type = EFIstr;
		    break;
		default:
		    type = Ostr;
		    break;
		}
		t = &Table[i].bootid;
		startcyl = lel(Table[i].relsect)/(heads*sectors);
		length = lel(Table[i].numsect) / (long)(heads * sectors);
		if (lel(Table[i].numsect) % (long)(heads * sectors))
			length++;
		endcyl = startcyl + length - 1;
		percent = length * 100 / Numcyl;
		if ((remainder = (length*100 % Numcyl)) != 0) {
			if ((remainder * 100 / Numcyl) > 50) {
				/* round up */
				percent++;
			}
			/* Else leave the percent as is since it's already */
			/* rounded down */
		}
		if (percent > 100)
			percent = 100;
		printf("\n          %d       %s    %-12.12s   %4d  %4d    %4d"
		    "    %3d", i+1, stat, type, startcyl, endcyl, length,
			percent);
	}
	/* Print warning message if table is empty */
	if (Table[0].systid == UNUSED) {
		printf(W_LINE);
		printf("WARNING: no partitions are defined!");
	} else {
		/* Clear the warning line */
		printf(W_LINE);
	}
}

/*
 * print_Table
 * Write the detailed fdisk table to standard error for
 * the selected disk device.
 */
print_Table() {
	int i;

	fprintf(stderr,
	    "  SYSID ACT BHEAD BSECT BEGCYL   EHEAD ESECT ENDCYL   RELSECT"
	    "   NUMSECT\n");

	for (i = 0; i < FD_NUMPART; i++) {
		fprintf(stderr, "  %-5d ", Table[i].systid);
		fprintf(stderr, "%-3d ", Table[i].bootid);
		fprintf(stderr, "%-5d ", Table[i].beghead);
		fprintf(stderr, "%-5d ", Table[i].begsect & 0x3f);
		fprintf(stderr, "%-8d ", (((uint_t)Table[i].begsect &
			0xc0) << 2) + Table[i].begcyl);

		fprintf(stderr, "%-5d ", Table[i].endhead);
		fprintf(stderr, "%-5d ", Table[i].endsect & 0x3f);
		fprintf(stderr, "%-8d ", (((uint_t)Table[i].endsect &
			0xc0) << 2) + Table[i].endcyl);
		fprintf(stderr, "%-9d ", lel(Table[i].relsect));
		fprintf(stderr, "%-9d\n", lel(Table[i].numsect));

	}
}

/*
 * copy_Table_to_Old_Table
 * Copy Table into Old_Table. The function only copies the systid,
 * numsect, relsect, and bootid values because they are the only
 * ones compared when determining if Table has changed.
 */
copy_Table_to_Old_Table()
{
	int i;
	for (i = 0; i < FD_NUMPART; i++)  {
	    memcpy(&Old_Table[i], &Table[i], sizeof (Table[0]));
	}
}

/*
 * nulltbl
 * Zero out the systid, numsect, relsect, and bootid values in the
 * fdisk table.
 */
nulltbl()
{
	int i;

	for (i = 0; i < FD_NUMPART; i++)  {
	    Table[i].systid = UNUSED;
	    Table[i].numsect = lel(UNUSED);
	    Table[i].relsect = lel(UNUSED);
	    Table[i].bootid = 0;
	}
}

/*
 * copy_Bootblk_to_Table
 * Copy the bytes from the boot record to an internal "Table".
 * All unused are padded with zeros starting at offset 446.
 */
copy_Bootblk_to_Table()
{
	int i, j;
	char *bootptr;
	unsigned char *tbl_ptr;
	int tblpos;
	void fill_ipart(char *, struct ipart *);
	struct ipart iparts[FD_NUMPART];

	/* Get an aligned copy of the partition tables */
	memcpy(iparts, Bootblk->parts, sizeof (iparts));
	tbl_ptr = &Table[0].bootid;
	bootptr = (char *)iparts;	/* Points to start of partition table */
	if (les(Bootblk->signature) != MBB_MAGIC)  {
		/* Signature is missing */
		nulltbl();
		memcpy(Bootblk->bootinst, &BootCod, BOOTSZ);
		return;
	}
	/*
	 * When the DOS fdisk command deletes a partition, it is not
	 * recognized by the old algorithm.  The algorithm that
	 * follows looks at each entry in the Bootrec and copies all
	 * those that are valid.
	 */
	j = 0;
	for (i = 0; i < FD_NUMPART; i++) {
		if (iparts[i].systid == 0) {
			/* Null entry */
			bootptr += sizeof (struct ipart);
		} else {
			(void) fill_ipart(bootptr, &Table[j]);
			j++;
			bootptr += sizeof (struct ipart);
		}
	}
	for (i = j; i < FD_NUMPART; i++) {
		Table[i].systid = UNUSED;
		Table[i].numsect = lel(UNUSED);
		Table[i].relsect = lel(UNUSED);
		Table[i].bootid = 0;

	}
	/* For now, always replace the bootcode with ours */
	memcpy(Bootblk->bootinst, &BootCod, BOOTSZ);
	copy_Table_to_Bootblk();
}

/*
 * fill_ipart
 * Initialize ipart structure values.
 */
void
fill_ipart(char *bootptr, struct ipart *partp)
{
#ifdef sparc
	/* Packing struct ipart for Sparc */
	partp->bootid = getbyte(&bootptr);
	partp->beghead = getbyte(&bootptr);
	partp->begsect = getbyte(&bootptr);
	partp->begcyl = getbyte(&bootptr);
	partp->systid = getbyte(&bootptr);
	partp->endhead = getbyte(&bootptr);
	partp->endsect = getbyte(&bootptr);
	partp->endcyl = getbyte(&bootptr);
	partp->relsect = getlong(&bootptr);
	partp->numsect = getlong(&bootptr);
#else
	*partp = *(struct ipart *)bootptr;
#endif
}

/*
 * getbyte, getshort, getlong
 * 	Get a byte, a short, or a long (SPARC only).
 */
#ifdef sparc
getbyte(uchar_t **bp)
{
	int	b;

	b = **bp;
	*bp = *bp + 1;
	return (b);
}

getshort(uchar_t **bp)
{
	int	b;

	b = ((**bp) << 8) | *(*bp + 1);
	*bp += 2;
	return (b);
}

getlong(uchar_t **bp)
{
	int	b, bh, bl;

	bh = ((**bp) << 8) | *(*bp + 1);
	*bp += 2;
	bl = ((**bp) << 8) | *(*bp + 1);
	*bp += 2;

	b = (bh << 16) | bl;
	return (b);
}
#endif

/*
 * copy_Table_to_Bootblk
 * Copy the table into the 512 boot record. Note that the unused
 * entries will always be the last ones in the table and they are
 * marked with 100 in sysind. The the unused portion of the table
 * is padded with zeros in the bytes after the used entries.
 */
copy_Table_to_Bootblk()
{
	struct ipart *boot_ptr, *tbl_ptr;

	boot_ptr = (struct ipart *)Bootblk->parts;
	tbl_ptr = (struct ipart *)&Table[0].bootid;
	for (; tbl_ptr < (struct ipart *)&Table[FD_NUMPART].bootid;
	    tbl_ptr++, boot_ptr++) {
	    if (tbl_ptr->systid == UNUSED)
		memset(boot_ptr, 0, sizeof (struct ipart));
	    else
		memcpy(boot_ptr, tbl_ptr, sizeof (struct ipart));
	}
	Bootblk->signature = les(MBB_MAGIC);
}

/*
 * TableChanged
 * 	Check for any changes in the partition table.
 */
TableChanged()
{
	int i, changed;

	changed = 0;
	for (i = 0; i < FD_NUMPART; i++) {
	    if (memcmp(&Old_Table[i], &Table[i], sizeof (Table[0])) != 0) {
		/* Partition table changed, write back to disk */
		changed = 1;
	    }
	}

	return (changed);
}

/*
 * ffile_write
 * 	Display contents of partition table to standard output or
 *	another file name without writing it to the disk (-W file).
 */
ffile_write(file)
char	*file;
{
	register int	i;
	register int	c;
	FILE *fp;

	/*
	 * If file isn't standard output, then it's a file name.
	 * Open file and write it.
	 */
	if (file != (char *)stdout) {
	    if ((fp = fopen(file, "w")) == NULL) {
		(void) fprintf(stderr, "fdisk: Cannot open output file %s.\n",
		    file);
		exit(1);
	    }
	}
	else
	    fp = stdout;

	/*
	 * Write the fdisk table information
	 */
	fprintf(fp, "\n* %s default fdisk table\n", Dfltdev);
	fprintf(fp, "* Dimensions:\n");
	fprintf(fp, "*   %4d bytes/sector\n", sectsiz);
	fprintf(fp, "*   %4d sectors/track\n", sectors);
	fprintf(fp, "*   %4d tracks/cylinder\n", heads);
	fprintf(fp, "*   %4d cylinders\n", Numcyl);
	fprintf(fp, "*\n");
	/* Write virtual (HBA) geometry, if required	*/
	if (v_flag) {
		fprintf(fp, "* HBA Dimensions:\n");
		fprintf(fp, "*   %4d bytes/sector\n", sectsiz);
		fprintf(fp, "*   %4d sectors/track\n", hba_sectors);
		fprintf(fp, "*   %4d tracks/cylinder\n", hba_heads);
		fprintf(fp, "*   %4d cylinders\n", hba_Numcyl);
		fprintf(fp, "*\n");
	}
	fprintf(fp, "* systid:\n");
	fprintf(fp, "*    1: DOSOS12\n");
	fprintf(fp, "*    2: PCIXOS\n");
	fprintf(fp, "*    4: DOSOS16\n");
	fprintf(fp, "*    5: EXTDOS\n");
	fprintf(fp, "*    6: DOSBIG\n");
	fprintf(fp, "*    7: FDISK_IFS\n");
	fprintf(fp, "*    8: FDISK_AIXBOOT\n");
	fprintf(fp, "*    9: FDISK_AIXDATA\n");
	fprintf(fp, "*   10: FDISK_0S2BOOT\n");
	fprintf(fp, "*   11: FDISK_WINDOWS\n");
	fprintf(fp, "*   12: FDISK_EXT_WIN\n");
	fprintf(fp, "*   14: FDISK_FAT95\n");
	fprintf(fp, "*   15: FDISK_EXTLBA\n");
	fprintf(fp, "*   18: DIAGPART\n");
	fprintf(fp, "*   65: FDISK_LINUX\n");
	fprintf(fp, "*   82: FDISK_CPM\n");
	fprintf(fp, "*   86: DOSDATA\n");
	fprintf(fp, "*   98: OTHEROS\n");
	fprintf(fp, "*   99: UNIXOS\n");
	fprintf(fp, "*  101: FDISK_NOVELL3\n");
	fprintf(fp, "*  119: FDISK_QNX4\n");
	fprintf(fp, "*  120: FDISK_QNX42\n");
	fprintf(fp, "*  121: FDISK_QNX43\n");
	fprintf(fp, "*  130: SUNIXOS\n");
	fprintf(fp, "*  131: FDISK_LINUXNAT\n");
	fprintf(fp, "*  134: FDISK_NTFSVOL1\n");
	fprintf(fp, "*  135: FDISK_NTFSVOL2\n");
	fprintf(fp, "*  165: FDISK_BSD\n");
	fprintf(fp, "*  167: FDISK_NEXTSTEP\n");
	fprintf(fp, "*  183: FDISK_BSDIFS\n");
	fprintf(fp, "*  184: FDISK_BSDISWAP\n");
	fprintf(fp, "*  190: X86BOOT\n");
	fprintf(fp, "*  191: SUNIXOS2\n");
	fprintf(fp, "*  238: EFI_PMBR\n");
	fprintf(fp, "*  239: EFI_FS\n");
	fprintf(fp, "*\n");
	fprintf(fp,
	    "\n* Id    Act  Bhead  Bsect  Bcyl    Ehead  Esect  Ecyl"
	    "    Rsect    Numsect\n");
	for (i = 0; i < FD_NUMPART; i++) {
		if (Table[i].systid != UNUSED)
			fprintf(fp,
			    "  %-5d %-4d %-6d %-6d %-7d %-6d %-6d %-7d %-8d"
			    " %-8d\n",
			    Table[i].systid,
			    Table[i].bootid,
			    Table[i].beghead,
			    Table[i].begsect & 0x3f,
			    ((Table[i].begcyl & 0xff) | ((Table[i].begsect &
				0xc0) << 2)),
			    Table[i].endhead,
			    Table[i].endsect & 0x3f,
			    ((Table[i].endcyl & 0xff) | ((Table[i].endsect &
				0xc0) << 2)),
			    lel(Table[i].relsect),
			    lel(Table[i].numsect));
	}
	if (fp != stdout)
		fclose(fp);
}

/*
 * fix_slice
 * 	Read the VTOC table on the Solaris partition and check that no
 *	slices exist that extend past the end of the Solaris partition.
 *	If no Solaris partition exists, nothing is done.
 */
fix_slice()
{
	int	i;
	int	ret;
	int	numsect;

	if (io_image) {
		return (0);
	}

	for (i = 0; i < FD_NUMPART; i++) {
		if (Table[i].systid == SUNIXOS || Table[i].systid == SUNIXOS2) {
			/*
			 * Only the size matters (not starting point), since
			 * VTOC entries are relative to the start of
			 * the partition.
			 */
			numsect = lel(Table[i].numsect);
			break;
		}
	}

	if (i >= FD_NUMPART) {
		if (!io_nifdisk) {
			(void) fprintf(stderr,
			    "fdisk: No Solaris partition found - VTOC not"
			    " checked.\n");
		}
		return (1);
	}

	if ((ret = readvtoc()) != VTOC_OK) {
		exit(1);		/* Failed to read the VTOC */
	} else {
		for (i = 0; i < V_NUMPAR; i++) {
			/* Special case for slice two (entire disk) */
			if (i == 2) {
				if (disk_vtoc.v_part[i].p_start != 0) {
					(void) fprintf(stderr,
					    "slice %d starts at %d, is not at"
					    " start of partition",
						i, disk_vtoc.v_part[i].p_start);
					if (!io_nifdisk) {
					    printf(" adjust ?:");
					    if (yesno())
						disk_vtoc.v_part[i].p_start = 0;
					} else {
					    disk_vtoc.v_part[i].p_start = 0;
					    (void) fprintf(stderr,
						" adjusted!\n");
					}

				}
				if (disk_vtoc.v_part[i].p_size != numsect) {
					(void) fprintf(stderr,
					    "slice %d size %d does not cover"
					    " complete partition",
						i, disk_vtoc.v_part[i].p_size);
					if (!io_nifdisk) {
					    printf(" adjust ?:");
					    if (yesno())
						disk_vtoc.v_part[i].p_size =
						    numsect;
					} else {
					    disk_vtoc.v_part[i].p_size =
						numsect;
					    (void) fprintf(stderr,
						" adjusted!\n");
					}
				}
				if (disk_vtoc.v_part[i].p_tag != V_BACKUP) {
				    (void) fprintf(stderr,
					"slice %d tag was %d should be %d",
					i, disk_vtoc.v_part[i].p_tag,
					V_BACKUP);
				    if (!io_nifdisk) {
					printf(" fix ?:");
					    if (yesno())
						disk_vtoc.v_part[i].p_tag =
						    V_BACKUP;
				    } else {
					disk_vtoc.v_part[i].p_tag = V_BACKUP;
					(void) fprintf(stderr, " fixed!\n");
					}
				}
			} else {
				if (io_ADJT) {
				    if (disk_vtoc.v_part[i].p_start > numsect ||
					disk_vtoc.v_part[i].p_start +
					disk_vtoc.v_part[i].p_size > numsect) {
					    (void) fprintf(stderr,
						"slice %d (start %d, end %d) is"
						" larger than the partition",
						i, disk_vtoc.v_part[i].p_start,
						disk_vtoc.v_part[i].p_start +
						    disk_vtoc.v_part[i].p_size);
					    if (!io_nifdisk) {
						printf(" remove ?:");
						if (yesno()) {
						    disk_vtoc.v_part[i].p_size =
							0;
						    disk_vtoc.v_part[i].p_start
							= 0;
						    disk_vtoc.v_part[i].p_tag =
							0;
						    disk_vtoc.v_part[i].p_flag =
							0;
						}
					    } else {
						disk_vtoc.v_part[i].p_size = 0;
						disk_vtoc.v_part[i].p_start = 0;
						disk_vtoc.v_part[i].p_tag = 0;
						disk_vtoc.v_part[i].p_flag = 0;
						(void) fprintf(stderr,
						    " removed!\n");
						}
					}
				} else {
				    if (disk_vtoc.v_part[i].p_start >
					numsect) {
					(void) fprintf(stderr,
					    "slice %d (start %d) is larger"
					    " than the partition",
						i, disk_vtoc.v_part[i].p_start);
					if (!io_nifdisk) {
					    printf(" remove ?:");
					    if (yesno()) {
						disk_vtoc.v_part[i].p_size = 0;
						disk_vtoc.v_part[i].p_start =
						    0;
						disk_vtoc.v_part[i].p_tag = 0;
						disk_vtoc.v_part[i].p_flag = 0;
					    }
					} else {
					    disk_vtoc.v_part[i].p_size = 0;
					    disk_vtoc.v_part[i].p_start = 0;
					    disk_vtoc.v_part[i].p_tag = 0;
					    disk_vtoc.v_part[i].p_flag = 0;
					    (void) fprintf(stderr,
						" removed!\n");
					    }
					} else if (disk_vtoc.v_part[i].p_start
					    + disk_vtoc.v_part[i].p_size >
					    numsect) {
					    (void) fprintf(stderr,
						"slice %d (end %d) is larger"
						" than the partition",
						i,
						disk_vtoc.v_part[i].p_start +
						disk_vtoc.v_part[i].p_size);
					    if (!io_nifdisk) {
						printf(" adjust ?:");
						if (yesno()) {
						    disk_vtoc.v_part[i].p_size
							= numsect;
						}
					    } else {
						disk_vtoc.v_part[i].p_size =
						    numsect;
						(void) fprintf(stderr,
						    " adjusted!\n");
						}
					}
				}
			}
		}
	}
#if 1		/* bh for now */
	/* Make the VTOC look sane - ha ha */
	disk_vtoc.v_version = V_VERSION;
	disk_vtoc.v_sanity = VTOC_SANE;
	disk_vtoc.v_nparts = V_NUMPAR;
	if (disk_vtoc.v_sectorsz == 0)
		disk_vtoc.v_sectorsz = NBPSCTR;
#endif

	/* Write the VTOC back to the disk */
	if (!io_readonly)
		writevtoc();
}

/*
 * yesno
 * Get yes or no answer. Return 1 for yes and 0 for no.
 */

yesno()
{
	char	s[80];

	for (;;) {
		gets(s);
		rm_blanks(s);
		if ((s[1] != 0) || ((s[0] != 'y') && (s[0] != 'n'))) {
			printf(E_LINE);
			printf("Please answer with \"y\" or \"n\": ");
			continue;
		}
		if (s[0] == 'y')
			return (1);
		else
			return (0);
	}
}

/*
 * readvtoc
 * 	Read the VTOC from the Solaris partition of the device.
 */
readvtoc()
{
	int	i;
	int	retval = VTOC_OK;

	if ((i = read_vtoc(Dev, &disk_vtoc)) < VTOC_OK) {
		if (i == VT_EINVAL) {
			(void) fprintf(stderr, "fdisk: Invalid VTOC.\n");
			vt_inval++;
			retval = VTOC_INVAL;
		} else if (i == VT_ENOTSUP) {
			(void) fprintf(stderr, "fdisk: partition may have EFI "
				"GPT\n");
			retval = VTOC_NOTSUP;
		} else {
			(void) fprintf(stderr, "fdisk: Cannot read VTOC.\n");
			retval = VTOC_RWERR;
		}
	}
	return (retval);
}

/*
 * writevtoc
 * 	Write the VTOC to the Solaris partition on the device.
 */
writevtoc()
{
	int	i;
	int	retval = 0;

	if ((i = write_vtoc(Dev, &disk_vtoc)) != 0) {
		if (i == VT_EINVAL) {
			(void) fprintf(stderr,
			    "fdisk: Invalid entry exists in VTOC.\n");
			retval = VTOC_INVAL;
		} else if (i == VT_ENOTSUP) {
			(void) fprintf(stderr, "fdisk: partition may have EFI "
				"GPT\n");
			retval = VTOC_NOTSUP;
		} else {
			(void) fprintf(stderr, "fdisk: Cannot write VTOC.\n");
			retval = VTOC_RWERR;
		}
	}
	return (retval);
}

/*
 * efi_ioctl
 * issues DKIOCSETEFI IOCTL
 * (duplicate of private efi_ioctl() in rdwr_efi.c
 */
static int
efi_ioctl(int fd, int cmd, dk_efi_t *dk_ioc)
{
	void *data = dk_ioc->dki_data;
	int error;

	dk_ioc->dki_data_64 = (uintptr_t)data;
	error = ioctl(fd, cmd, (void *)dk_ioc);

	return (error);
}

/*
 * clear_efi
 * Clear EFI labels from the EFI_PMBR partition on the device
 * This function is modeled on the libefi(3LIB) call efi_write()
 */
int
clear_efi()
{
	struct dk_gpt	*efi_vtoc;
	dk_efi_t	dk_ioc;

	/*
	 * see if we can read the EFI label
	 */
	if (efi_alloc_and_read(Dev, &efi_vtoc) < 0) {
		return (VT_ERROR);
	}

	/*
	 * set up the dk_ioc structure for writing
	 */
	dk_ioc.dki_lba = 1;
	dk_ioc.dki_length = EFI_MIN_ARRAY_SIZE + efi_vtoc->efi_lbasize;

	if ((dk_ioc.dki_data = calloc(dk_ioc.dki_length, 1)) == NULL) {
		return (VT_ERROR);
	}

	/*
	 * clear the primary label
	 */
	if (io_debug) {
		fprintf(stderr, "\tClearing primary EFI label at block "
		    "%d\n", dk_ioc.dki_lba);
	}

	if (efi_ioctl(Dev, DKIOCSETEFI, &dk_ioc) == -1) {
		free(dk_ioc.dki_data);
		switch (errno) {
			case EIO:
				return (VT_EIO);
			case EINVAL:
				return (VT_EINVAL);
			default:
				return (VT_ERROR);
		}
	}

	/*
	 * clear the backup partition table
	 */
	dk_ioc.dki_lba = efi_vtoc->efi_last_u_lba + 1;
	dk_ioc.dki_length -= efi_vtoc->efi_lbasize;
	dk_ioc.dki_data++;
	if (io_debug) {
		fprintf(stderr, "\tClearing backup partition table at block "
		    "%d\n", dk_ioc.dki_lba);
	}

	if (efi_ioctl(Dev, DKIOCSETEFI, &dk_ioc) == -1) {
		(void) fprintf(stderr, "\tUnable to clear backup EFI label at "
			"block %llu; errno %d\n", efi_vtoc->efi_last_u_lba + 1,
			errno);
	}

	/*
	 * clear the backup label
	 */
	dk_ioc.dki_lba = efi_vtoc->efi_last_lba;
	dk_ioc.dki_length = efi_vtoc->efi_lbasize;
	dk_ioc.dki_data--;
	if (io_debug) {
		fprintf(stderr, "\tClearing backup label at block "
		    "%d\n", dk_ioc.dki_lba);
	}

	if (efi_ioctl(Dev, DKIOCSETEFI, &dk_ioc) == -1) {
		(void) fprintf(stderr, "\tUnable to clear backup EFI label at "
			"block %llu; errno %d\n", efi_vtoc->efi_last_lba,
			errno);
	}

	free(dk_ioc.dki_data);
	efi_free(efi_vtoc);

	return (0);
}

/*
 * clear_vtoc
 * 	Clear the VTOC from the current or previous Solaris partition on the
 *      device.
 */
int
clear_vtoc(int table, int part)
{
	struct ipart *clr_table;
	struct dk_label disk_label;
	int pcyl, ncyl, backup_block, solaris_offset, count, bytes, seek_byte;

#ifdef DEBUG
	struct dk_label	read_label;
#endif /* DEBUG */

	if (table == OLD) {
		clr_table = &Old_Table[part];
	} else {
		clr_table = &Table[part];
	}

	if (memset(&disk_label, 0, sizeof (struct dk_label)) == NULL) {
		fprintf(stderr, "\tError zeroing dk_label structure\n");
	}

	seek_byte = (lel(clr_table->relsect) * sectsiz) + VTOC_OFFSET;

	if (io_debug) {
		fprintf(stderr, "\tClearing primary VTOC at byte %d\n",
		    seek_byte);
	}

	if (lseek(Dev, seek_byte, SEEK_SET) == -1) {
		fprintf(stderr, "\tError seeking to primary label at byte %d\n",
		    seek_byte);
		return (0);
	}

	bytes = write(Dev, &disk_label, sizeof (struct dk_label));

	if (bytes != sizeof (struct dk_label)) {
		fprintf(stderr, "\tWarning: only %d bytes written to clear"
		    " primary VTOC!\n", bytes);
	}

#ifdef DEBUG
	if (lseek(Dev, seek_byte, SEEK_SET) == -1) {
		fprintf(stderr, "DEBUG: Error seeking to primary label at byte "
		    "%d\n", seek_byte);
		return (0);
	} else {
		fprintf(stderr, "DEBUG: Successful lseek() to byte %d\n",
		    seek_byte);
	}

	bytes = read(Dev, &read_label, sizeof (struct dk_label));

	if (bytes != sizeof (struct dk_label)) {
		fprintf(stderr, "DEBUG: Warning: only %d bytes read of label\n",
		    bytes);
	}

	if (memcmp(&disk_label, &read_label, sizeof (struct dk_label)) != 0) {
		fprintf(stderr, "DEBUG: Warning: disk_label and read_label "
		    "differ!!!\n");
	} else {
		fprintf(stderr, "DEBUG Good compare of disk_label and "
		    "read_label\n");
	}
#endif /* DEBUG */

	/* Clear backup label */
	pcyl = lel(clr_table->numsect) / (heads * sectors);
	solaris_offset = lel(clr_table->relsect);
	ncyl = pcyl - acyl;

	backup_block = ((ncyl + acyl - 1) *
	    (heads * sectors)) + ((heads - 1) * sectors) + 1;

	for (count = 1; count < 6; count++) {
		seek_byte = (solaris_offset + backup_block) * 512;

		if (lseek(Dev, seek_byte, SEEK_SET) == -1) {
			fprintf(stderr,
			    "\tError seeking to backup label at byte %d on "
			    "%s.\n", seek_byte, Dfltdev);
			return (0);
		}

		if (io_debug) {
			fprintf(stderr, "\tClearing backup VTOC at"
			    " byte %d (block %d)\n",
			    (solaris_offset + backup_block) * 512,
			    (solaris_offset + backup_block));
		}

		bytes = write(Dev, &disk_label, sizeof (struct dk_label));

		if (bytes != sizeof (struct dk_label)) {
			fprintf(stderr, "\t\tWarning: only %d bytes written to "
			    "clear backup VTOC at block %d!\n", bytes,
			    (solaris_offset + backup_block));
		}

#ifdef DEBUG
	if (lseek(Dev, seek_byte, SEEK_SET) == -1) {
		fprintf(stderr, "DEBUG: Error seeking to backup label at byte "
		    "%d\n", seek_byte);
		return (0);
	} else {
		fprintf(stderr, "DEBUG: Successful lseek() to byte %d\n",
		    seek_byte);
	}

	bytes = read(Dev, &read_label, sizeof (struct dk_label));

	if (bytes != sizeof (struct dk_label)) {
		fprintf(stderr, "DEBUG: Warning: only %d bytes read of backup "
		    "label\n", bytes);
	}

	if (memcmp(&disk_label, &read_label, sizeof (struct dk_label)) != 0) {
		fprintf(stderr, "DEBUG: Warning: disk_label and read_label "
		    "differ!!!\n");
	} else {
		fprintf(stderr, "DEBUG: Good compare of disk_label and backup "
		    "read_label\n");
	}
#endif /* DEBUG */

		backup_block += 2;
	}

	return (0);
}

#define	FDISK_STANDARD_LECTURE \
	"Fdisk is normally used with the device that " \
	"represents the entire fixed disk.\n" \
	"(For example, /dev/rdsk/c0d0p0 on x86 or " \
	"/dev/rdsk/c0t5d0s2 on sparc).\n"

#define	FDISK_LECTURE_NOT_SECTOR_ZERO \
	"The device does not appear to include absolute\n" \
	"sector 0 of the PHYSICAL disk " \
	"(the normal location for an fdisk table).\n"

#define	FDISK_LECTURE_NOT_FULL \
	"The device does not appear to encompass the entire PHYSICAL disk.\n"

#define	FDISK_LECTURE_NO_VTOC \
	"Unable to find a volume table of contents.\n" \
	"Cannot verify the device encompasses the full PHYSICAL disk.\n"

#define	FDISK_LECTURE_NO_GEOM \
	"Unable to get geometry from device.\n" \
	"Cannot verify the device encompasses the full PHYSICAL disk.\n"

#define	FDISK_SHALL_I_CONTINUE \
	"Are you sure you want to continue? (y/n) "

/*
 *  lecture_and_query
 *	Called when a sanity check fails.  This routine gives a warning
 *	specific to the check that fails, followed by a generic lecture
 *	about the "right" device to supply as input.  Then, if appropriate,
 *	it will prompt the user on whether or not they want to continue.
 *	Inappropriate times for prompting are when the user has selected
 *	non-interactive mode or read-only mode.
 */
int
lecture_and_query(char *warning, char *devname)
{
	if (io_nifdisk)
		return (0);

	fprintf(stderr, "WARNING: Device %s: \n", devname);
	fprintf(stderr, "%s", warning);
	fprintf(stderr, FDISK_STANDARD_LECTURE);
	fprintf(stderr, FDISK_SHALL_I_CONTINUE);

	return (yesno());
}

void
sanity_check_provided_device(char *devname, int fd)
{
	struct vtoc v;
	struct dk_geom d;
	struct part_info pi;
	long totsize;
	int idx = -1;

	/*
	 *  First try the PARTINFO ioctl.  If it works, we will be able
	 *  to tell if they've specified the full disk partition by checking
	 *  to see if they've specified a partition that starts at sector 0.
	 */
	if (ioctl(fd, DKIOCPARTINFO, &pi) != -1) {
		if (pi.p_start != 0) {
			if (!lecture_and_query(FDISK_LECTURE_NOT_SECTOR_ZERO,
			    devname)) {
				(void) close(fd);
				exit(1);
			}
		}
	} else {
		if ((idx = read_vtoc(fd, &v)) < 0) {
			if (!lecture_and_query(FDISK_LECTURE_NO_VTOC,
			    devname)) {
				(void) close(fd);
				exit(1);
			}
			return;
		}
		if (ioctl(fd, DKIOCGGEOM, &d) == -1) {
			perror(devname);
			if (!lecture_and_query(FDISK_LECTURE_NO_GEOM,
			    devname)) {
				(void) close(fd);
				exit(1);
			}
			return;
		}
		totsize = d.dkg_ncyl * d.dkg_nhead * d.dkg_nsect;
		if (v.v_part[idx].p_size != totsize) {
			if (!lecture_and_query(FDISK_LECTURE_NOT_FULL,
			    devname)) {
				(void) close(fd);
				exit(1);
			}
		}
	}
}


/*
 * get_node
 * Called from main to construct the name of the device node to open.
 * Initially tries to stat the node exactly as provided, if that fails
 * we prepend the default path (/dev/rdsk/).
 */
static char *
get_node(char *devname)
{
	char *node;
	struct stat statbuf;
	size_t space;

	/* Don't do anything if we are skipping device checks */
	if (io_image)
		return (devname);

	node = devname;

	/* Try the node as provided first */
	if (stat(node, (struct stat *)&statbuf) == -1) {
		/*
		 * Copy the passed in string to a new buffer, prepend the
		 * default path and try again.
		 */
		space = strlen(DEFAULT_PATH) + strlen(devname) + 1;

		if ((node = malloc(space)) == NULL) {
			fprintf(stderr, "fdisk: Unable to obtain memory "
			    "for device node.\n");
			exit(1);
		}

		/* Copy over the default path and the provided node */
		(void) strncpy(node, DEFAULT_PATH, strlen(DEFAULT_PATH));
		space -= strlen(DEFAULT_PATH);
		(void) strlcpy(node + strlen(DEFAULT_PATH), devname, space);

		/* Try to stat it again */
		if (stat(node, (struct stat *)&statbuf) == -1) {
			/* Failed all options, give up */
			fprintf(stderr, "fdisk: Cannot stat device %s.\n",
			    devname);
			exit(1);
		}
	}

	/* Make sure the device specified is the raw device */
	if ((statbuf.st_mode & S_IFMT) != S_IFCHR) {
		fprintf(stderr, "fdisk: %s must be a raw device.\n", node);
		exit(1);
	}

	return (node);
}