_plutorun is called by the ipsec initscript to configure and bring up pluto(8). It invokes pluto, and watches to makes sure that pluto is restarted if it fails, as the SYSV initscripts do not provide a restart facility. When other init systems are used, such as systemd or upstart, _plutorun is not used.
Man page written for the Linux FreeS/WAN project <https://www.freeswan.org/> by Michael Richardson. Original program written by Henry Spencer. Updated for the Libreswan project <https://libreswan.org/> by Paul Wouters