PREIN

/bin/sh

getent group stap-server >/dev/null || groupadd -g 155 -r stap-server || groupadd -r stap-server

PREUN

/bin/sh

# Ditto
(make -C /usr/share/systemtap/runtime/uprobes clean) >/dev/null 2>&1 || true
(/sbin/rmmod uprobes) >/dev/null 2>&1 || true

POSTIN

/bin/sh

# Remove any previously-built uprobes.ko materials
(make -C /usr/share/systemtap/runtime/uprobes clean) >/dev/null 2>&1 || true
(/sbin/rmmod uprobes) >/dev/null 2>&1 || true