NAME

       runit - a UNIX process no 1

SYNOPSIS

       runit

DESCRIPTION

       runit  must  be  run as Unix process no 1.  It performs the system's booting, running, and
       shutdown in three stages:

STAGE 1

       runit runs /etc/runit/1 and waits for it to terminate.  The system's one  time  tasks  are
       done here.  /etc/runit/1 has full control of /dev/console to be able to start an emergency
       shell if the one time initialization tasks fail. If /etc/runit/1 crashes,  or  exits  100,
       runit will skip stage 2 and enter stage 3.

STAGE 2

       runit  runs /etc/runit/2, which should not return until system shutdown; if it crashes, or
       exits 111, it will be restarted.  Normally /etc/runit/2 starts runsvdir(8).  runit is able
       to handle the ctrl-alt-del keyboard request in stage 2, see below.

STAGE 3

       If  runit  is told to shutdown the system, or stage 2 returns, it terminates stage 2 if it
       is running, and runs /etc/runit/3.  The systems tasks to shutdown  and  possibly  halt  or
       reboot  the  system  are  done  here.   If  stage  3  returns,  runit  checks  if the file
       /etc/runit/reboot exists and has the execute by owner permission set.  If so,  the  system
       is rebooted, it's halted otherwise.

CTRL-ALT-DEL

       If  runit  receives  the  ctrl-alt-del keyboard request and the file /etc/runit/ctrlaltdel
       exists and has the execute by owner  permission  set,  runit  runs  /etc/runit/ctrlaltdel,
       waits for it to terminate, and then sends itself a CONT signal.

SIGNALS

       runit only accepts signals in stage 2.

       If  runit receives a CONT signal and the file /etc/runit/stopit exists and has the execute
       by owner permission set, runit is told to shutdown the system.

       if runit receives an INT signal, a ctrl-alt-del keyboard request is triggered.

SEE ALSO

       runit-init(8),  runsvdir(8),  runsvchdir(8),  sv(8),   runsv(8),   chpst(8),   utmpset(8),
       svlogd(8)

       http://smarden.org/runit/

AUTHOR

       Gerrit Pape <pape@smarden.org>

                                                                                         runit(8)