Implement preos and triggering

hacking/preos-sh/remote-exec.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+# echo $@
+# set -x
+
+chroot="$1"; shift
+
+script=$(mktemp "${chroot}/tmp/chroot-${0##*/}.XXXXXXXXXX")
+trap cleanup INT TERM EXIT
+cleanup() {
+   [ $__cdist_debug ] || rm "$script"
+}
+
+echo "#!/bin/sh -l" > "$script"
+echo "$@" >> "$script"
+chmod +x "$script"
+
+relative_script="${script#$chroot}"
+
+# ensure PATH is setup
+export PATH=$PATH:/bin:/usr/bin:/sbin:/usr/sbin
+
+# run in chroot
+chroot "$chroot" "$relative_script"