Nathan Whitehorn 40923b0c81 Fix scripted installation from media without local distfiles.
The bsdinstall script target did not have the infrastructure to fetch
distfiles from a remote server the way the interactive installer does
on e.g. bootonly media. Solve this by factoring out the parts of the
installer that deal with fetching missing distributions into a new
install stage called 'fetchmissingdists', which is called by both the
interactive and scripted installer frontends.

In the course of these changes, cleaned up a few other issues with
the fetching of missing distribution files and added a warning if
fetching the MANIFEST file, which is used to verify the integrity of
the distribution files. We should at some point add cryptographic
signatures to MANIFEST so that it can be fetched safely if not present
on the install media (which it is for bootonly media).

Initial patch by: Vinícius Zavam
PR:		255659, 250928
Reviewed by:	dteske
MFC after:	4 weeks
Differential Revision:	https://reviews.freebsd.org/D27121
2021-05-28 10:01:27 -04:00

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#!/bin/sh
#-
# Copyright (c) 2011 Nathan Whitehorn
# Copyright (c) 2013-2018 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.
#
# $FreeBSD$
#
error()
{
dialog --backtitle "FreeBSD Installer" --title "Error" --msgbox $1 0 0
exit 1
}
FETCH_DISTRIBUTIONS=""
LOCAL_DISTRIBUTIONS=""
for dist in $DISTRIBUTIONS; do
if [ ! -f $BSDINSTALL_DISTDIR/$dist ]; then
FETCH_DISTRIBUTIONS="$FETCH_DISTRIBUTIONS $dist"
else
LOCAL_DISTRIBUTIONS="$LOCAL_DISTRIBUTIONS $dist"
fi
done
LOCAL_DISTRIBUTIONS=`echo $LOCAL_DISTRIBUTIONS` # Trim white space
FETCH_DISTRIBUTIONS=`echo $FETCH_DISTRIBUTIONS` # Trim white space
if [ -z "$FETCH_DISTRIBUTIONS" ]; then
echo $BSDINSTALL_DISTDIR >&2
exit 0
fi
ALL_DISTRIBUTIONS="$DISTRIBUTIONS"
WANT_DEBUG=
# Download to a directory in the new system as scratch space
BSDINSTALL_FETCHDEST="$BSDINSTALL_CHROOT/usr/freebsd-dist"
mkdir -p "$BSDINSTALL_FETCHDEST" || error "Could not create directory $BSDINSTALL_FETCHDEST"
if [ -z "$BSDINSTALL_DISTSITE" ]; then
exec 3>&1
BSDINSTALL_DISTSITE=$(`dirname $0`/mirrorselect 2>&1 1>&3)
MIRROR_BUTTON=$?
exec 3>&-
test $MIRROR_BUTTON -eq 0 || error "No mirror selected"
export BSDINSTALL_DISTSITE
fi
BSDINSTALL_DISTDIR_ORIG="$BSDINSTALL_DISTDIR"
export BSDINSTALL_DISTDIR="$BSDINSTALL_FETCHDEST"
export FTP_PASSIVE_MODE=YES
if [ -f "$BSDINSTALL_DISTDIR_ORIG/MANIFEST" ]; then
cp "$BSDINSTALL_DISTDIR_ORIG/MANIFEST" "$BSDINSTALL_DISTDIR/MANIFEST"
VERIFY_MANIFEST_SIG=0
else
FETCH_DISTRIBUTIONS="MANIFEST $FETCH_DISTRIBUTIONS"
VERIFY_MANIFEST_SIG=1
# XXX actually verify signature on manifest
dialog --backtitle "FreeBSD Installer" --title "Warning" --msgbox "Manifest not found on local disk and will be fetched from an unverified source. This is a potential security risk. If you do not wish to proceed, press control-C now." 0 0
fi
if [ ! -z "$LOCAL_DISTRIBUTIONS" ]; then
# Copy local stuff first
env DISTRIBUTIONS="$LOCAL_DISTRIBUTIONS" \
BSDINSTALL_DISTSITE="file://$BSDINSTALL_DISTDIR" \
bsdinstall distfetch || \
error "Failed to fetch distribution from local media"
fi
export DISTRIBUTIONS="$FETCH_DISTRIBUTIONS"
# Iterate through the distribution list and set a flag if debugging
# distributions have been selected.
for _DISTRIBUTION in $DISTRIBUTIONS; do
case $_DISTRIBUTION in
*-dbg.*)
[ -e $BSDINSTALL_DISTDIR/$_DISTRIBUTION ] \
&& continue
WANT_DEBUG=1
DEBUG_LIST="\n$DEBUG_LIST\n$_DISTRIBUTION"
;;
*)
;;
esac
done
# Fetch the distributions.
bsdinstall distfetch
rc=$?
if [ $rc -ne 0 ]; then
# If unable to fetch the remote distributions, recommend
# deselecting the debugging distributions, and retrying the
# installation, since failure to fetch *-dbg.txz should not
# be considered a fatal installation error.
msg="Failed to fetch remote distribution"
if [ ! -z "$WANT_DEBUG" ]; then
# Trim leading and trailing newlines.
DEBUG_LIST="${DEBUG_LIST%%\n}"
DEBUG_LIST="${DEBUG_LIST##\n}"
msg="$msg\n\nPlease deselect the following distributions"
msg="$msg and retry the installation:"
msg="$msg\n$DEBUG_LIST"
fi
error "$msg"
fi
echo $BSDINSTALL_DISTDIR >&2