===================================================================
RCS file: /cvs/openbsd/fw_update/fw_install.sh,v
retrieving revision 1.1
retrieving revision 1.51
diff -u -r1.1 -r1.51
--- openbsd/fw_update/fw_install.sh	2021/09/30 04:06:56	1.1
+++ openbsd/fw_update/fw_install.sh	2021/12/07 02:42:01	1.51
@@ -1,119 +1,129 @@
 #!/bin/ksh
-set -e
+#	$OpenBSD: fw_install.sh,v 1.51 2021/12/07 02:42:01 afresh1 Exp $
+#
+# Copyright (c) 2021 Andrew Hewus Fresh <afresh1@openbsd.org>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
-scan_dmesg() {
-	# no bsort for now
-	sed -n "$1" /var/run/dmesg.boot
-}
+set -o errexit -o pipefail -o nounset
 
-installed_firmware() {
-	for fw in ${PKGDIR}/$1-firmware*; do
-		[ -e "$fw" ] || continue
-		echo ${fw##*/}
-	done
-}
+CFILE=SHA256.sig
+DESTDIR=${DESTDIR:-}
+FWPATTERNS="${DESTDIR}/usr/share/misc/firmware_patterns"
 
-set -A _KERNV -- $( scan_dmesg '/^OpenBSD \([1-9][0-9]*\.[0-9]\)\([^ ]*\) .*/ { s//\1 \2/p; q; }' )
-VNAME=${_KERNV[0]}
-OSDIR=$VNAME
-if ((${#_KERNV[*]} > 1)) && [ "$_KERNV[1]" = "-current" -o "$_KERNV[1]" = "-beta" ]; then
-	OSDIR=snapshots
-fi
+VNAME=${VNAME:-$(sysctl -n kern.osrelease)}
+VERSION=${VERSION:-"${VNAME%.*}${VNAME#*.}"}
 
-FWURL=http://firmware.openbsd.org/firmware/${OSDIR}
-PKGDIR=${DESTDIR}/var/db/pkg
-PATTERNS="file:${0%/*}/firmware_patterns"
+HTTP_FWDIR="$VNAME"
+VTYPE=$( sed -n "/^OpenBSD $VNAME\([^ ]*\).*$/s//\1/p" /var/run/dmesg.boot | sed '$!d' )
+[[ $VTYPE == -!(stable) ]] && HTTP_FWDIR=snapshots
 
-drivers=$(
-	last=''
-	ftp -D "Detecting" -Vmo- $PATTERNS |
-	while read d m; do
-		[ "$last" = "$d" ] && continue
-		[ "$m" ] || m="^$d[0-9][0-9]* at "
-		[ "$( scan_dmesg "/$m/ { p; q; }" )" ] || continue
-		echo $d
-		last=$d
-	done
-)
+FWURL=http://firmware.openbsd.org/firmware/${HTTP_FWDIR}
+FWPUB_KEY=${DESTDIR}/etc/signify/openbsd-${VERSION}-fw.pub
 
-if [ -z "$drivers" ]; then
-	echo "No devices found which need firmware files to be downloaded." >&2
-	exit 0
-fi
+tmpdir() {
+	local _i=1 _dir
 
-tmpdir=${DESTDIR}/tmp/fw_update
-[ -e "$tmpdir" ] && rm -rf "$tmpdir"
-mkdir -p "$tmpdir"
-cd "$tmpdir"
+	# If we're not in the installer,
+	# we have mktemp and a more hostile environment
+	if [ -x /usr/bin/mktemp ]; then
+		_dir=$( mktemp -d "${1}-XXXXXXXXX" )
+	else
+		until _dir="${1}.$_i.$RANDOM" && mkdir -- "$_dir" 2>/dev/null; do
+		    ((++_i < 10000)) || return 1
+		done
+	fi
 
-# TODO: Drop privs during fetch and verify
-ftp -D Get -Vm "$FWURL/SHA256.sig"
+	echo "$_dir"
+}
 
-# Probably should bundle the firmware sigfile on the installer,
-# although we can just get it from the recently installed system.
-if [ "$DESTDIR" ]; then
-	sigfile=$( sed -n '/^untrusted comment: verify with \(.*\)$/ { s//\1/p; q; }' SHA256.sig )
-	if [ ! -e "/etc/signify/$sigfile" ] \
-	  && [ -e "${DESTDIR}/etc/signify/$sigfile" ]; then
-		cp -a "${DESTDIR}/etc/signify/$sigfile" "/etc/signify/$sigfile"
+fetch() {
+	local _file=$1 _user=_file _exit
+
+	>"$_file"
+	chown "$_user" "$_file"
+
+	# If we're not in the installer, we have su(1)
+	# and doas(1) is unlikely to be configured.
+	if [ -x /usr/bin/sh ]; then
+		/usr/bin/su -s /bin/ksh "$_user" -c \
+		    "/usr/bin/ftp -D 'Get/Verify' -Vm \
+		        -o '$_file' '${FWURL}/${_file}'"
+		_exit="$?"
+	else
+		/usr/bin/doas -u "$_user" \
+		    ftp -D 'Get/Verify' -Vm \
+		        -o "$_file" "${FWURL}/${_file}"
+		_exit="$?"
 	fi
-fi
 
-signify -Ve -x SHA256.sig -m - < SHA256.sig > SHA256
+	if [ "$_exit" -ne 0 ]; then
+		rm -f "$_file"
+		echo "Cannot fetch $_file" >&2
+		return 1
+	fi
 
-for d in $drivers; do
-	firmware=$( sed -n "s/.*(\($d-firmware-.*\.tgz\)).*/\1/p" SHA256 )
-	installed=$( installed_firmware $d )
+	chown root "$_file"
+}
 
-	for i in $installed; do
-		if [ "$firmware" = "$i.tgz" ]; then
-			echo "Firmware for $d already installed ($installed)"
-			continue 2
-		fi
-	done
+verify() {
+	# On the installer we don't get sha256 -C, so fake it.
+	if ! fgrep -qx "SHA256 ($1) = $( /bin/sha256 -qb "$1" )" "$CFILE"; then
+		echo "Checksum test for $1 failed." >&2
+		return 1
+	fi
+}
 
-	mkdir $d
+devices_needing_firmware() {
+	local _d _m _grep _dmesgtail _last=''
 
-	# TODO: Drop privs during fetch and verify
-	ftp -D "Get/Verify" -Vmo- "$FWURL/$firmware" | sha256 -bph "$d/h" > "$firmware"
-	fgrep -qx "SHA256 ($firmware) = $(<$d/h)" SHA256
+	# When we're not in the installer, the dmesg.boot can
+	# contain multiple boots, so only look in the last one
+	_dmesgtail=$( sed -n 'H;/^OpenBSD/h;${g;p;}' /var/run/dmesg.boot )
 
-	# TODO: Check hash for files before deleting
-	if [ "$installed" ] && [ -e "${PKGDIR}/$installed/+CONTENTS" ]; then
-		echo "Uninstalling $installed"
-		cwd=${PKGDIR}/$installed
+	grep -v '^[[:space:]]*#' "$FWPATTERNS" |
+	    while read -r _d _m; do
+		_grep="grep"
+		[ "$_last" = "$_d" ] && continue
+		[ "$_m" ] || _m="^${_d}[0-9][0-9]* at "
+		[ "$_m" = "${_m#^}" ] && _grep="fgrep"
 
-		remove="${cwd}/+CONTENTS ${cwd}"
+		echo "$_dmesgtail" | $_grep -q "$_m" || continue
+		echo "$_d"
+		_last="$_d"
+	done
+}
 
-		while read c g; do
-			case $c in
-			@cwd) cwd=$g
-			  ;;
-			@*) continue
-			  ;;
-			*)  remove="$cwd/$c $remove"
-			  ;;
-			esac
-		done < "${PKGDIR}/$installed/+CONTENTS"
+firmware_filename() {
+	sed -n "s/.*(\($1-firmware-.*\.tgz\)).*/\1/p" "$CFILE" | sed '$!d'
+}
 
-		for r in $remove ; do
-			if [ -d "$r" ]; then
-				# Try hard not to actually remove recursively
-				# without rmdir on the install media.
-				[ "$r/*" = $( echo "$r"/* ) ] && rm -rf "$r"
-			else
-				rm -f "$r"
-			fi
-		done
-	fi
+installed_firmware() {
+	for fw in "${DESTDIR}/var/db/pkg/$1-firmware"*; do
+		[ -e "$fw" ] || continue
+		echo "${fw##*/}"
+	done
+}
 
-	# TODO: Add some details about the install to +CONTENTS like pkg_add
-	# TODO: Or, maybe we save the firmware someplace and make pkg_add reinstall
-	echo "Installing $firmware"
-	tar -zxphf "$firmware" -C /etc "firmware/*"
-	mkdir -p ${PKGDIR}/${firmware%.tgz}/
-	tar -zxphf "$firmware" -C "${PKGDIR}/${firmware%.tgz}" "+*"
-    ed -s "${PKGDIR}/${firmware%.tgz}/+CONTENTS" <<EOL
+add_firmware () {
+	local _f="$1" _pkgdir="${DESTDIR}/var/db/pkg"
+	ftp -D "Install" -Vmo- "file:${1}" |
+		tar -s ",^\+,${_pkgdir}/${_f%.tgz}/+," \
+		-s ",^firmware,${DESTDIR}/etc/firmware," \
+		-C / -zxphf - "+*" "firmware/*"
+
+	# TODO: Should we mark these so real fw_update can -Drepair?
+	ed -s "${_pkgdir}/${_f%.tgz}/+CONTENTS" <<EOL
 /^@comment pkgpath/ -1a
 @option manual-installation
 @option firmware
@@ -121,5 +131,81 @@
 .
 w
 EOL
+}
+
+delete_firmware() {
+	local _cwd _pkg="$1" _pkgdir="${DESTDIR}/var/db/pkg"
+
+	# TODO: Check hash for files before deleting
+	echo "Uninstalling $_pkg"
+	_cwd="${_pkgdir}/$_pkg"
+
+	set -A _remove -- "${_cwd}/+CONTENTS" "${_cwd}"
+
+	while read -r c g; do
+		case $c in
+		@cwd) _cwd="${DESTDIR}$g"
+		  ;;
+		@*) continue
+		  ;;
+		*)  set -A _remove -- "$_cwd/$c" "${_remove[@]}"
+		  ;;
+		esac
+	done < "${_pkgdir}/${_pkg}/+CONTENTS"
+
+	# We specifically rm -f here because not removing files/dirs
+	# is probably not worth failing over.
+	for _r in "${_remove[@]}" ; do
+		if [ -d "$_r" ]; then
+			# Try hard not to actually remove recursively
+			# without rmdir on the install media.
+			[ "$_r/*" = "$( echo "$_r"/* )" ] && rm -rf "$_r"
+		else
+			rm -f "$_r"
+		fi
+	done
+}
+
+set -A devices -- $( devices_needing_firmware )
+
+if [ ! "${devices:-}" ]; then
+	echo "No devices found which need firmware files to be downloaded."
+	exit
+fi
+
+TMPDIR=$( tmpdir "${DESTDIR}/tmp/fw_install" )
+cd "$TMPDIR"
+
+# To unpriv we need to let the unpriv user into this dir
+chmod go+x .
+
+fetch "$CFILE"
+! signify -Vep "$FWPUB_KEY" -x "$CFILE" -m "$CFILE" &&
+    echo "Signature check of SHA256.sig failed" >&2 && exit 1
+
+for d in "${devices[@]}"; do
+	f=$( firmware_filename "$d" )
+	[ "$f" ] || continue
+	set -A installed -- $( installed_firmware "$d" )
+
+	if [ "${installed:-}" ]; then
+		for i in "${installed[@]:-}"; do
+			if [ "$f" = "$i.tgz" ]; then
+				echo "$i already installed"
+				continue 2
+			fi
+		done
+	fi
+
+	fetch  "$f" || continue
+	verify "$f" || continue
+
+	if [ "${installed:-}" ]; then
+		for i in "${installed[@]}"; do
+			delete_firmware "$i"
+		done
+	fi
+
+	add_firmware "$f"
 done