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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
   /run/runit.reboot  exists  and has the execute by owner permission set.
   If  so,  the  system  is   rebooted,   it's   halted   otherwise.    If
   /run/runit.nosync  exists,  runit doesn't invoke sync(). This is useful
   in vservers.

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 /run/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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