INVOKE-RC.D(8)                 Debian GNU/Linux                 INVOKE-RC.D(8)

       invoke-rc.d - executes System-V style init script actions

       invoke-rc.d   [--quiet]   [--force]   [--try-anyway]  [--disclose-deny]
       [--query] [--no-fallback] name action [init script parameters...]

       invoke-rc.d [--help]

       invoke-rc.d is a generic interface  to  execute  System  V  style  init
       script  /etc/init.d/name  actions, obeying runlevel constraints as well
       as any local policies set by the system administrator.

       All access to the init scripts by Debian packages'  maintainer  scripts
       should be done through invoke-rc.d.

       This manpage documents only the usage and behavior of invoke-rc.d.  For
       a discussion of the System V style init script arrangements please  see
       init(8).   More  information on invoke-rc.d can be found in the section
       on runlevels and init.d scripts of the Debian Policy Manual.

       The  standard  actions   are:   start,   stop,   force-stop,   restart,
       try-restart,  reload,  force-reload, and status.  Other actions are ac-
       cepted, but they can cause problems to policy-rc.d (see the INIT SCRIPT
       POLICY  section),  so warnings are generated if the policy layer is ac-

       Please note that not all init scripts will implement  all  the  actions
       listed  above,  and that the policy layer may override an action to an-
       other action(s), or even deny it.

       Any extra parameters will be passed to the init  script(s)  being  exe-

       If  an action must be carried out regardless of any local policies, use
       the --force switch.

       --help Display usage help.

              Quiet mode, no error messages are generated.

              Tries to run the init  script  regardless  of  policy  and  init
              script  subsystem  errors.   Use  of this option in Debian main-
              tainer scripts is severely discouraged.

              Tries to run the init script if a non-fatal error is detected.

              Return status code 101 instead of status  code  0  if  the  init
              script action is denied by the policy layer.

              Returns  one  of the status codes 100-106. Does not run the init
              script, and implies --disclose-deny and --no-fallback.

              Ignores any fallback action requests by the policy layer.  Warn-
              ing:  this is usually a very bad idea for any actions other than

              Exits before doing anything if a systemd environment is detected
              and  the  requested  service  is a native systemd unit.  This is
              useful for maintainer scripts that want to defer systemd actions
              to deb-systemd-invoke(1p)

       Should  an init script be executed, invoke-rc.d always returns the sta-
       tus code returned by the init script. Init scripts  should  not  return
       status  codes in the 100+ range (which is reserved in Debian and by the
       LSB). The status codes returned by invoke-rc.d proper are:

       0      Success.  Either the init script was run and returned exit  sta-
              tus  0 (note that a fallback action may have been run instead of
              the one given in the command line), or it was not run because of
              runlevel/local  policy  constrains and --disclose-deny is not in

       1 - 99 Reserved for init.d script, usually indicates a failure.

       100    Init script ID (name) unknown.  This means the init  script  was
              not registered successfully through update-rc.d or that the init
              script does not exist.

       101    Action not allowed.  The requested action will not be  performed
              because of runlevel or local policy constraints.

       102    Subsystem  error.   Init script (or policy layer) subsystem mal-
              function. Also, forced init script execution due to --try-anyway
              or --force failed.

       103    Syntax error.

       104    Action allowed.  Init script would be run, but --query is in ef-

       105    Behavior uncertain.  It cannot be determined if action should be
              carried out or not, and --query is in effect.

       106    Fallback  action  requested.   The  policy  layer denied the re-
              quested action, and supplied an allowed fallback  action  to  be
              used instead.

       invoke-rc.d  introduces  the concept of a policy layer which is used to
       verify if an init script should be run or not,  or  if  something  else
       should  be done instead.  This layer has various uses, the most immedi-
       ate ones being avoiding that package upgrades start daemons out-of-run-
       level, and that a package starts or stops daemons while inside a chroot

       The policy layer has the following abilities: deny or approve the  exe-
       cution of an action; request that another action (called a fallback) is
       to be taken, instead of the action requested in  invoke-rc.d's  command
       line;  or  request  multiple actions to be tried in order, until one of
       them succeeds (a multiple fallback).

       invoke-rc.d itself only pays attention to the current runlevel; it will
       block  any  attempts to start a service in a runlevel in which the ser-
       vice is disabled.  Other policies are implemented with the use  of  the
       policy-rc.d  helper, and are only available if /usr/sbin/policy-rc.d is
       installed in the system.

              System V init scripts.

              Init script policy layer helper (not required).

              System V runlevel configuration.

       invoke-rc.d special cases the status action, and returns exit status  4
       instead of exit status 0 when it is denied.

       See                         and

       Debian Policy manual,

       Henrique de Moraes Holschuh

       Licence: GNU Public Licence v2 or Later (GPLv2+)

       2001 Henrique de Moraes Holschuh

1 March 2001                                                    INVOKE-RC.D(8)

Man(1) output converted with man2html
list of all man pages