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-.\"
-.\" This file and its contents are supplied under the terms of the
-.\" Common Development and Distribution License ("CDDL"), version 1.0.
-.\" You may only use this file in accordance with the terms of version
-.\" 1.0 of the CDDL.
-.\"
-.\" A full copy of the text of the CDDL should have accompanied this
-.\" source.  A copy of the CDDL is also available via the Internet at
-.\" http://www.illumos.org/license/CDDL.
-.\"
-.\"
-.\" Copyright 2021 Toomas Soome <tsoome@me.com>
-.\"
-.Dd Oct 16, 2021
-.Dt INSTALLBOOT 1M
-.Os
-.Sh NAME
-.Nm installboot
-.Nd install bootloader in a disk partition
-.Sh SYNOPSIS
-.Ss SPARC
-.Nm
-.Op Fl fn
-.Op Fl F Sy zfs Ns | Ns Sy ufs Ns | Ns Sy hsfs
-.Op Fl u Ar verstr
-.Ar bootblk raw-device
-.Nm
-.Op Fl enV
-.Fl F Sy zfs
-.Fl i
-.Ar raw-device | Ar file
-.Nm
-.Op Fl n
-.Fl F Sy zfs
-.Fl M
-.Ar raw-device attach-raw-device
-.Ss x86
-.Nm
-.Op Fl fFmn
-.Op Fl b Ar boot_dir
-.Op Fl u Ar verstr
-.Op Ar stage1 stage2
-raw-device
-.Nm
-.Op Fl enV
-.Fl i
-.Ar raw-device | Ar file
-.Nm
-.Op Fl n
-.Fl M
-.Ar raw-device attach-raw-device
-.Sh DESCRIPTION
-The
-.Xr boot 1M
-boot program is loaded from disk and is responsible of loading kernel and its
-support files from specific file system.
-.Pp
-The SPARC systems have one boot loader program file to be installed on the boot
-area of a disk slice.
-As the SPARC zfs boot loader is too large to fit into boot area at the start of
-the disk slice,
-.Nm
-command will split the zfs boot loader between disk slice boot area, and zfs
-pool boot area.
-.Pp
-The x86 BIOS systems have boot loader implemented as three stages:
-.Bl -tag -width Ds
-.It Sy stage1
-.Pa /boot/pmbr
-is used as master boot record
-.Pq MBR
-and partition boot program.
-.It Sy stage2
-.Pa /boot/gptzfsboot
-is responsible for loading files from file system.
-The
-.Sy stage2
-on x86 systems is always installed to zfs pool boot area, and therefore only zfs
-boot is supported.
-.Nm
-command will record the location of
-.Sy stage2
-to
-.Sy stage1 ,
-which is always installed at least on partition
-.Pq MBR or GPT
-boot area, making it possible to boot via chainload from other boot loaders.
-.Pp
-When
-.Nm
-command is used with the
-.Fl m
-option,
-.Nm
-installs the stage1 file on the master boot sector of the disk as well.
-.It Sy stage3
-.Pa /boot/loader
-is read from file system and executed by
-.Sy stage2
-and will provide boot loader user environment and is responsible of loading
-and starting the operating system kernel.
-.Pp
-In case of GPT partitioning scheme, if the file system to boot from is either
-UFS or PCFS, there must be
-.Sy boot
-partition defined to store stage2 boot program.
-This is needed because UFS and PCFS do not have sufficient space reserved to
-store boot programs.
-.Pp
-The boot partition must use following GPT UUID:
-.Bd -literal -offset indent
-6a82cb45-1dd2-11b2-99a6-080020736631
-.Ed
-.Pp
-which is provided by
-.Qq boot
-tag in
-.Xr format 1M
-partition menu.
-.El
-.Pp
-The x86 UEFI systems load and start boot loader program from
-.Sy /EFI/Boot
-directory of the EFI System Partition (ESP).
-The boot loader program in ESP is named
-.Sy bootx64.efi
-for AMD64 system and
-.Sy bootia32.efi
-for i386 system.
-Note, only a 64-bit kernel is supported, even on i386 systems.
-The
-.Sy bootia32.efi
-boot program is only provided to support systems with 32-bit UEFI firmware,
-but which can support 64-bit mode.
-.Pp
-The
-.Sy bootx64.efi
-is copied from
-.Sy /boot/loader64.efi
-and
-.Sy bootia32.efi
-is copied from
-.Sy /boot/loader32.efi .
-.Ss Options
-The
-.Nm
-command accepts the following options:
-.Bl -tag -width Ds
-.It Fl b Ar boot_dir
-Provide path to the directory, where loader boot programs are located.
-.Nm
-will automatically pick the needed programs and will install to the
-specified disk device.
-.It Fl h
-Prints short usage message.
-.It Fl m
-Installs
-.Sy stage1
-on the master boot sector interactively.
-You must use this option if OS is installed on an extended FDISK or an EFI/GPT
-partition.
-.It Fl f
-Suppresses interaction when overwriting the master boot sector on x86.
-Force update on SPARC.
-.It Fl n
-Dry run session.
-Will not write to disk.
-.It Fl F
-On SPARC, specify file system type.
-On x86, inhibit version check and enforce boot loader update.
-.It Fl u Ar verstr
-Specify custom version string.
-Can be used to add version on non-versioned boot loader or change built in
-version string.
-.It Fl i
-Print version string from installed boot loader or from indicated file.
-.It Fl e
-Print version string from installed boot loader without description.
-.It Fl V
-Print version string from installed boot loader with full description.
-.It Fl M
-Mirror boot loader from installed disk partition.
-.El
-.Ss Operands
-The
-.Nm
-command accepts the following operands:
-.Bl -tag -width Ds
-.It Ar bootblk
-The name of the SPARC boot loader code.
-.It Ar stage1
-The name of the loader stage 1 file.
-.It Ar stage2
-The name of the loader stage 2 file.
-.It Ar raw-device
-The name of the device onto which bootloader code is to be installed.
-It must be a character device that is readable and writable and part of boot
-pool.
-.El
-.Sh FILES
-.Bl -tag -width Ds
-.It Pa /boot
-Directory where x86 loader files reside.
-.It Pa /usr/platform/platform name/lib/fs
-Directory where SPARC boot loader files reside.
-.El
-.Sh EXAMPLES
-.Bl -tag -width Ds
-.It Sy Example 1 No Installing zfs boot loader on SPARC disk slice
-The following command installs zfs boot loader on SPARC system:
-.Bd -literal
-# installboot -F zfs /usr/platform/`uname -i`/lib/fs/zfs/bootblk \e
-  /dev/rdsk/c0t0d0s0
-.Ed
-.It Sy Example 2 No Installing boot loader on x86 system
-The following command installs loader stage files and master boot record:
-.Bd -literal
-# installboot -m /boot/pmbr /boot/gptzfsboot /dev/rdsk/c0t0d0s0
-.Ed
-.El
-.Sh INTERFACE STABILITY
-.Sy Uncommitted
-.Sh SEE ALSO
-.Xr boot 1M ,
-.Xr bootadm 1M ,
-.Xr fdisk 1M ,
-.Xr fmthard 1M ,
-.Xr format 1M ,
-.Xr kernel 1M ,
-.Xr attributes 5
-.Sh WARNINGS
-Installing
-.Sy stage1
-on the master boot sector
-.Po
-.Fl m
-option
-.Pc
-overrides any boot loader currently installed on the machine.
-The system will always boot the current OS partition regardless of which fdisk
-partition is active.
-.Pp
-If version string indicates the source boot loader might be more recent,
-.Nm
-will also verify md5 checksums to determine if update is really necessary.
-If checksums match, the install will not be performed.