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runit(8)               DragonFly System Manager's Manual              runit(8)


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)

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