From 93216cddf60bafa359c4fb1b57017cb10bbde9ff Mon Sep 17 00:00:00 2001
From: Andrew Cady <d@jerkface.net>
Date: Wed, 7 Feb 2018 16:39:17 -0500
Subject: avoid cutesy tar --to-command; instead extract to tempdir

---
 src/selfstrap | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/src/selfstrap b/src/selfstrap
index 265fa25..72fda34 100755
--- a/src/selfstrap
+++ b/src/selfstrap
@@ -226,25 +226,28 @@ dpkg_unpack()
     PKG=${PKG%%_*}
     PKG=$PKG$multiarch
 
-    # TODO: always set status=installed if there is no preinst or postinst script
+    extract_tmp_ci "$deb"
+    install_metadata_from_tmp_ci # uses TARGET PKG SET_STATUS
+    remove_tmp_ci
 
-    command=$(cat <<'EOF'
-set -e
-if [ "$SET_STATUS" -a "$TAR_FILENAME" = ./control ]; then
-    (sed "/^Package:/a Status: install ok $SET_STATUS"; echo) >> "$TARGET"/var/lib/dpkg/status
-else
-    f=$TARGET/var/lib/dpkg/info/$PKG.${TAR_FILENAME#./}
-    cat > "$f"
-    chmod $TAR_MODE "$f"
-fi
-EOF
-)
-    (export PKG TARGET SET_STATUS; dpkg --ctrl-tarfile "$deb" | tar -x --to-command "$command") || die 'tar'
     dpkg --fsys-tarfile "$deb" |
         (cd "$TARGET" && tar -xv) |
         sed 's?^\.??; s?^/$?/.?; s?/$??' > "$TARGET/var/lib/dpkg/info/$PKG.list"
 }
 
+install_metadata_from_tmp_ci() # uses TARGET PKG SET_STATUS
+{
+    (cd "$TARGET"/var/lib/dpkg/tmp.ci || die "cannot cd to /var/lib/dpkg/tmp.ci"
+#    PKG=$(sed -n 's/^Package: *//p' control)
+     for f in *; do
+         [ "$f" = postinst ] && SET_STATUS=${SET_STATUS:+installed} || true
+         [ "$f" = control ] || mv "$f" "$TARGET"/var/lib/dpkg/info/"$PKG"."$f"
+     done
+     if [ "$SET_STATUS" -a -e control ]; then
+         (sed "/^Package:/a Status: install ok $SET_STATUS"; echo) < control >> "$TARGET"/var/lib/dpkg/status
+     fi)
+}
+
 verbosely()
 {
     if [ "$VERBOSE" ]; then
-- 
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