Version 20170320

The systemd package creates a subvolume at /var/lib/machines (through
tmpfiles), if it can. We need to delete this subvolume before we can
delete the parent subvolume.

Look through the root for inodes with the number 256. These identify
subvolume roots.

Makefile

@@ -1,4 +1,4 @@
-V=20170304
+V=20170320
 
 PREFIX = /usr/local
 

arch-nspawn.in

@@ -9,8 +9,7 @@
 # GNU General Public License for more details.
 
 m4_include(lib/common.sh)
-
-CHROOT_VERSION='v4'
+m4_include(lib/archroot.sh)
 
 working_dir=''
 
@@ -26,8 +25,6 @@ usage() {
 	exit 1
 }
 
-orig_argv=("$@")
-
 while getopts 'hC:M:c:' arg; do
 	case "$arg" in
 		C) pac_conf="$OPTARG" ;;
@@ -40,7 +37,7 @@ done
 shift $(($OPTIND - 1))
 
 (( $# < 1 )) && die 'You must specify a directory.'
-check_root "$0" "${orig_argv[@]}"
+check_root
 
 working_dir=$(readlink -f "$1")
 shift 1

archbuild.in

@@ -1,6 +1,7 @@
 #!/bin/bash
 
 m4_include(lib/common.sh)
+m4_include(lib/archroot.sh)
 
 base_packages=(base-devel)
 makechrootpkg_args=(-c -n)
@@ -29,8 +30,6 @@ usage() {
 	exit 1
 }
 
-orig_argv=("$@")
-
 while getopts 'hcr:' arg; do
 	case "${arg}" in
 		c) clean_first=true ;;
@@ -39,7 +38,7 @@ while getopts 'hcr:' arg; do
 	esac
 done
 
-check_root "$0" "${orig_argv[@]}"
+check_root
 
 # Pass all arguments after -- right to makepkg
 makechrootpkg_args+=("${@:$OPTIND}")
@@ -53,9 +52,7 @@ if ${clean_first} || [[ ! -d "${chroots}/${repo}-${arch}" ]]; then
 
 		lock 9 "$copy.lock" "Locking chroot copy '$copy'"
 
-		if [[ "$(stat -f -c %T "${copy}")" == btrfs ]]; then
-			{ type -P btrfs && btrfs subvolume delete "${copy}"; } &>/dev/null
-		fi
+		subvolume_delete_recursive "${copy}"
 		rm -rf --one-file-system "${copy}"
 	done
 	exec 9>&-

lib/archroot.sh

@@ -0,0 +1,42 @@
+CHROOT_VERSION='v4'
+
+##
+#  usage : check_root
+##
+orig_argv=("$0" "$@")
+check_root() {
+	(( EUID == 0 )) && return
+	if type -P sudo >/dev/null; then
+		exec sudo -- "${orig_argv[@]}"
+	else
+		exec su root -c "$(printf ' %q' "${orig_argv[@]}")"
+	fi
+}
+
+##
+#  usage : is_btrfs( $path )
+# return : whether $path is on a btrfs
+##
+is_btrfs() {
+	[[ -e "$1" && "$(stat -f -c %T "$1")" == btrfs ]]
+}
+
+##
+#  usage : subvolume_delete_recursive( $path )
+#
+#    Find all btrfs subvolumes under and including $path and delete them.
+##
+subvolume_delete_recursive() {
+	local subvol
+
+	is_btrfs "$1" || return 0
+
+	while IFS= read -d $'\0' -r subvol; do
+		if ! btrfs subvolume delete "$subvol" &>/dev/null; then
+			error "Unable to delete subvolume %s" "$subvol"
+			return 1
+		fi
+	done < <(find "$1" -xdev -depth -inum 256 -print0)
+
+	return 0
+}

lib/common.sh

@@ -227,15 +227,3 @@ find_cached_package() {
 			return 1
 	esac
 }
-
-##
-#  usage : check_root ("$0" "$@")
-##
-check_root() {
-	(( EUID == 0 )) && return
-	if type -P sudo >/dev/null; then
-		exec sudo -- "$@"
-	else
-		exec su root -c "$(printf ' %q' "$@")"
-	fi
-}

makechrootpkg.in

@@ -9,6 +9,7 @@
 # GNU General Public License for more details.
 
 m4_include(lib/common.sh)
+m4_include(lib/archroot.sh)
 
 shopt -s nullglob
 
@@ -21,6 +22,7 @@ run_namcap=false
 temp_chroot=false
 chrootdir=
 passeddir=
+makepkg_user=
 declare -a install_pkgs
 declare -i ret=0
 
@@ -46,6 +48,10 @@ usage() {
 	echo 'command:'
 	echo '    mkarchroot <chrootdir>/root base-devel'
 	echo ''
+	echo 'This script reads {SRC,SRCPKG,PKG,LOG}DEST, MAKEFLAGS and PACKAGER'
+	echo 'from makepkg.conf(5), if those variables are not part of the'
+	echo 'environment.'
+	echo ''
 	echo "Default makepkg args: ${makepkg_args[*]}"
 	echo ''
 	echo 'Flags:'
@@ -63,6 +69,7 @@ usage() {
 	echo "           Default: $copy"
 	echo '-n         Run namcap on the package'
 	echo '-T         Build in a temporary directory'
+	echo '-U         Run makepkg as a specified user'
 	exit 1
 }
 
@@ -89,11 +96,9 @@ create_chroot() {
 		slock 8 "$chrootdir/root.lock" "Locking clean chroot"
 
 		stat_busy "Creating clean working copy [$copy]"
-		if [[ "$chroottype" == btrfs ]] && ! mountpoint -q "$copydir"; then
-			if [[ -d $copydir ]]; then
-				btrfs subvolume delete "$copydir" >/dev/null ||
-					die "Unable to delete subvolume %s" "$copydir"
-			fi
+		if is_btrfs "$chrootdir" && ! mountpoint -q "$copydir"; then
+			subvolume_delete_recursive "$copydir" ||
+				die "Unable to delete subvolume %s" "$copydir"
 			btrfs subvolume snapshot "$chrootdir/root" "$copydir" >/dev/null ||
 				die "Unable to create subvolume %s" "$copydir"
 		else
@@ -112,7 +117,7 @@ create_chroot() {
 
 clean_temporary() {
 	stat_busy "Removing temporary copy [$copy]"
-	if [[ "$chroottype" == btrfs ]] && ! mountpoint -q "$copydir"; then
+	if is_btrfs "$chrootdir" && ! mountpoint -q "$copydir"; then
 		btrfs subvolume delete "$copydir" >/dev/null ||
 			die "Unable to delete subvolume %s" "$copydir"
 	else
@@ -214,13 +219,13 @@ download_sources() {
 	chmod 1777 "$builddir"
 
 	# Ensure sources are downloaded
-	if [[ -n $SUDO_USER ]]; then
-		sudo -u $SUDO_USER env SRCDEST="$SRCDEST" BUILDDIR="$builddir" \
+	makepkg_user=${makepkg_user:-$SUDO_USER}
+	if [[ -n $makepkg_user ]]; then
+		sudo -u "$makepkg_user" env SRCDEST="$SRCDEST" BUILDDIR="$builddir" \
 			makepkg --config="$copydir/etc/makepkg.conf" --verifysource -o
 	else
-		( export SRCDEST BUILDDIR="$builddir"
-			makepkg --asroot --config="$copydir/etc/makepkg.conf" --verifysource -o
-		)
+		error "Running makepkg as root is not allowed."
+		exit 1
 	fi
 	(( $? != 0 )) && die "Could not download sources."
 
@@ -252,9 +257,7 @@ move_products() {
 }
 # }}}
 
-orig_argv=("$@")
-
-while getopts 'hcur:I:l:nTD:d:' arg; do
+while getopts 'hcur:I:l:nTD:d:U:' arg; do
 	case "$arg" in
 		c) clean_first=true ;;
 		D) bindmounts_ro+=(--bind-ro="$OPTARG") ;;
@@ -265,22 +268,21 @@ while getopts 'hcur:I:l:nTD:d:' arg; do
 		l) copy="$OPTARG" ;;
 		n) run_namcap=true; makepkg_args+=(-i) ;;
 		T) temp_chroot=true; copy+="-$$" ;;
+		U) makepkg_user="$OPTARG" ;;
 		h|*) usage ;;
 	esac
 done
 
 [[ ! -f PKGBUILD && -z "${install_pkgs[*]}" ]] && die 'This must be run in a directory containing a PKGBUILD.'
+[[ -n $makepkg_user && -z $(id -u "$makepkg_user") ]] && die 'Invalid makepkg user.'
 
-check_root "$0" "${orig_argv[@]}"
+check_root
 
 # Canonicalize chrootdir, getting rid of trailing /
 chrootdir=$(readlink -e "$passeddir")
 [[ ! -d $chrootdir ]] && die "No chroot dir defined, or invalid path '%s'" "$passeddir"
 [[ ! -d $chrootdir/root ]] && die "Missing chroot dir root directory. Try using: mkarchroot %s/root base-devel" "$chrootdir"
 
-# Detect chrootdir filesystem type
-chroottype=$(stat -f -c %T "$chrootdir")
-
 if [[ ${copy:0:1} = / ]]; then
 	copydir=$copy
 else

mkarchroot.in

@@ -9,8 +9,7 @@
 # GNU General Public License for more details.
 
 m4_include(lib/common.sh)
-
-CHROOT_VERSION='v4'
+m4_include(lib/archroot.sh)
 
 working_dir=''
 
@@ -24,8 +23,6 @@ usage() {
 	exit 1
 }
 
-orig_argv=("$@")
-
 while getopts 'hC:M:c:' arg; do
 	case "$arg" in
 		C) pac_conf="$OPTARG" ;;
@@ -39,7 +36,7 @@ shift $(($OPTIND - 1))
 
 (( $# < 2 )) && die 'You must specify a directory and one or more packages.'
 
-check_root "$0" "${orig_argv[@]}"
+check_root
 
 working_dir="$(readlink -f $1)"
 shift 1
@@ -60,7 +57,7 @@ mkdir -p "$working_dir"
 
 lock 9 "${working_dir}.lock" "Locking chroot"
 
-if [[ $(stat -f -c %T "$working_dir") == btrfs ]]; then
+if is_btrfs "$working_dir"; then
 	rmdir "$working_dir"
 	if ! btrfs subvolume create "$working_dir"; then
 		die "Couldn't create subvolume for '%s'" "$working_dir"