freebsd-nq/usr.sbin/bsdinstall/scripts/script
Nathan Whitehorn c2f16c595e Fix scripted installs on EFI systems after default mounting of the ESP.
Because the ESP mount point (/boot/efi) is in mtree, tar will attempt to
extract a directory at that point post-mount when the system is installed.
Normally, this is fine, since tar can happily set whatever properties it
wants. For FAT32 file systems, however, like the ESP, tar will attempt to
set mtime on the root directory, which FAT does not support, and tar will
interpret this as a fatal error, breaking the install (see
https://github.com/libarchive/libarchive/issues/1516). This issue would
also break scripted installs on bare-metal POWER8, POWER9, and PS3
systems, as well as some ARM systems.

This patch solves the problem in two ways:
- If stdout is a TTY, use the distextract stage instead of tar, as in
  interactive installs. distextract solves this problem internally and
  provides a nicer UI to boot, but requires a TTY.
- If stdout is not a TTY, use tar but, as a stopgap for 13.0, exclude
  boot/efi from tarball extraction and then add it by hand. This is a
  hack, and better solutions (as in the libarchive ticket above) will
  obsolete it, but it solves the most common case, leaving only
  unattended TTY-less installs on a few tier-2 platforms broken.

In addition, fix a bug with fstab generation uncovered once the tar issue
is fixed that umount(8) can depend on the ordering of lines in fstab in a
way that mount(8) does not. The partition editor now writes out fstab in
mount order, making sure umount (run at the end of scripted, but not
interactive, installs) succeeds.

PR:		254395
Reviewed by:	gjb, imp
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D29380
2021-03-23 09:29:54 -04:00

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#!/bin/sh
#-
# Copyright (c) 2013 Nathan Whitehorn
# Copyright (c) 2013-2015 Devin Teske
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#
############################################################ INCLUDES
BSDCFG_SHARE="/usr/share/bsdconfig"
. $BSDCFG_SHARE/common.subr || exit 1
f_dprintf "%s: loading includes..." "$0"
f_include $BSDCFG_SHARE/dialog.subr
f_include $BSDCFG_SHARE/variable.subr
############################################################ CONFIGURATION
# VARIABLES:
# PARTITIONS
# DISTRIBUTIONS
# BSDINSTALL_DISTDIR
#
# Default name of the ZFS boot-pool
#
: ${ZFSBOOT_POOL_NAME:=zroot}
############################################################ GLOBALS
: ${TMPDIR:="/tmp"}
#
# Strings that should be moved to an i18n file and loaded with f_include_lang()
#
msg_installation_error="Installation Error!"
############################################################ FUNCTIONS
error()
{
local file
f_getvar "$VAR_DEBUG_FILE#+" file
if [ "$file" ]; then
f_dialog_title "$msg_installation_error"
f_dialog_textbox "$file"
# No need to restore title, pining for the fjords
fi
[ -f "$PATH_FSTAB" ] || exit
if [ "$ZFSBOOT_DISKS" ]; then
zpool export $ZFSBOOT_POOL_NAME
else
bsdinstall umount
fi
exit 1
}
############################################################ MAIN
set -e
trap error EXIT
SCRIPT="$1"
shift
f_dprintf "Began Installation at %s" "$( date )"
rm -rf $BSDINSTALL_TMPETC
mkdir $BSDINSTALL_TMPETC
split -a 2 -p '^#!.*' "$SCRIPT" $TMPDIR/bsdinstall-installscript-
. $TMPDIR/bsdinstall-installscript-aa
: ${DISTRIBUTIONS="kernel.txz base.txz"}; export DISTRIBUTIONS
export BSDINSTALL_DISTDIR
# Re-initialize a new log if preamble changed BSDINSTALL_LOG
if [ "$BSDINSTALL_LOG" != "${debugFile#+}" ]; then
export debugFile="$BSDINSTALL_LOG"
f_quietly f_debug_init
# NB: Being scripted, let debug go to terminal for invalid debugFile
f_dprintf "Began Instalation at %s" "$( date )"
fi
# Make partitions
rm -f $PATH_FSTAB
touch $PATH_FSTAB
if [ "$ZFSBOOT_DISKS" ]; then
bsdinstall zfsboot
else
bsdinstall scriptedpart "$PARTITIONS"
bsdinstall mount
fi
# Unpack distributions
bsdinstall checksum
if [ -t 0 ]; then
# If install is a tty, use distextract as normal
bsdinstall distextract
else
# Otherwise, we need to use tar (see https://reviews.freebsd.org/D10736)
for set in $DISTRIBUTIONS; do
f_dprintf "Extracting $BSDINSTALL_DISTDIR/$set"
# XXX: The below fails if any mountpoints are FAT, due to
# inability to set ctime/mtime on the root of FAT partitions,
# which is needed to support e.g. EFI system partitions. tar has
# no option to ignore this (distextract ignores them internally
# through a hack), and returns 1 on any warning or error,
# effectively turning all warnings into fatal errors.
#
# Work around this in an extremely lame way for the specific
# case of EFI system partitions only. This *ONLY WORKS* if
# /boot/efi is empty and does not handle analagous problems on
# other systems (ARM, PPC64).
tar -xf "$BSDINSTALL_DISTDIR/$set" -C $BSDINSTALL_CHROOT --exclude boot/efi
mkdir -p $BSDINSTALL_CHROOT/boot/efi
done
fi
# Configure bootloader if needed
bsdinstall bootconfig
# Finalize install
bsdinstall config
# Make sure networking is functional, if we can arrange that
if [ ! -f $BSDINSTALL_CHROOT/etc/resolv.conf -a -f /etc/resolv.conf ]; then
cp /etc/resolv.conf $BSDINSTALL_CHROOT/etc/resolv.conf
fi
# Run post-install script
if [ -f $TMPDIR/bsdinstall-installscript-ab ]; then
cp $TMPDIR/bsdinstall-installscript-ab $BSDINSTALL_CHROOT/tmp/installscript
chmod a+x $BSDINSTALL_CHROOT/tmp/installscript
mount -t devfs devfs "$BSDINSTALL_CHROOT/dev"
chroot $BSDINSTALL_CHROOT /tmp/installscript $@ 2>&1
umount "$BSDINSTALL_CHROOT/dev"
rm $BSDINSTALL_CHROOT/tmp/installscript
fi
bsdinstall entropy
if [ "$ZFSBOOT_DISKS" ]; then
zpool export $ZFSBOOT_POOL_NAME
else
bsdinstall umount
fi
f_dprintf "Installation Completed at %s" "$( date )"
trap - EXIT
exit $SUCCESS
################################################################################
# END
################################################################################