preinstall_commands

# commands to run after basic checks but before starting the installation

msg "adjusting permissions of new system files before installing"
# (git does not preserve permissions)
# reset permissions on system files to default
chmod --preserve-root --recursive u=Xrw,g=Xr,o=Xr sysfiles1 || errmsg "failed to reset permissions in sysfiles1"
chmod --preserve-root --recursive u=Xrw,g=Xr,o=Xr sysfiles2 || errmsg "failed to reset permissions in sysfiles2"
# set special permissions on some file
#chmod --preserve-root g=,o= sysfiles2/etc/polkit-1/localauthority || errmsg "failed to change permissions on sysfiles2/etc/polkit-1/localauthority"