reworked and fixed

overlay-go

@@ -1,8 +1,22 @@
 #!/bin/sh
-set -x
-X="$(pgrep -f ".reaper $1")"
-grep -q "^proc " /proc/$X/mounts || \
-    sudo nsenter -t "$X" -m -p -r -w mount -t proc proc /proc
-ROOT="$(sudo nsenter -t "$X" -m -p -r -w mount | \
-	     awk -v S="$1" '$1==S{print $3;exit;}')"
-sudo nsenter -t "$X" -n -m -p -r -w -u -C /bin/bash
+
+[ $(id -u) = 0 ] || exec sudo $0 $@
+. $(dirname $(realpath $0))/functions XXX
+
+NAME="$1"
+
+read USPID RSPID <<EOF
+$(is_live $NAME)
+EOF
+
+[ -z "$USPID" ] && echo "$NAME is not running" >&2 && exit 1
+
+if [ -z "$RSPID" ] ; then
+    cat <<EOF >&2
+***  $NAME is started (pid $USPID) but doesn't seem to be running
+*** /.reaper and might need manual fixing.
+EOF
+    exit 1
+fi
+
+sudo nsenter -t "$RSPID" -n -m -p -r -w -u -C /bin/bash