# INVOKE-RC.D - executes System-V style init script actions - man(8) - [phpMan] [_INVOKE-RC.D_(8)](https://www.chedong.com/phpMan.php/man/INVOKE-RC.D/8/markdown) Debian GNU/Linux [_INVOKE-RC.D_(8)](https://www.chedong.com/phpMan.php/man/INVOKE-RC.D/8/markdown) ## NAME invoke-rc.d - executes System-V style init script actions ## SYNOPSIS **invoke-rc.d **[_--quiet_] [_--force_] [_--try-anyway_] [_--disclose-deny_] [_--query_] [_--no-fallback_] _name_ _action_ [_init_ _script_ _parameters..._] **invoke-rc.d **[_--help_] ## DESCRIPTION **invoke-rc.d **is a generic interface to execute System V style init script **/etc/init.d/_**name_ ac‐ tions, obeying runlevel constraints as well as any local policies set by the system adminis‐ trator. 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)](https://www.chedong.com/phpMan.php/man/init/8/markdown). More information on invoke-rc.d can be found in the section on runlevels and init.d scripts of the _Debian_ _Policy_ _Manual_. ## INIT SCRIPT ACTIONS The standard actions are: _start_, _stop_, _force-stop_, _restart_, _try-restart_, _reload_, _force-re‐_ _load_, and _status_. Other actions are accepted, 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‐ tive. Please note that not all init scripts will implement all the actions listed above, and that the policy layer may override an action to another action(s), or even deny it. Any extra parameters will be passed to the init script(s) being executed. If an action must be carried out regardless of any local policies, use the _--force_ switch. ## OPTIONS _--help_ Display usage help. _--quiet_ Quiet mode, no error messages are generated. _--force_ Tries to run the init script regardless of policy and init script subsystem errors. **Use of this option in Debian maintainer scripts is severely discouraged.** _--try-anyway_ Tries to run the init script if a non-fatal error is detected. _--disclose-deny_ Return status code 101 instead of status code 0 if the init script action is denied by the policy layer. _--query_ Returns one of the status codes 100-106. Does not run the init script, and implies _--disclose-deny_ and _--no-fallback_. _--no-fallback_ Ignores any fallback action requests by the policy layer. **Warning: **this is usually a very bad idea for any actions other than start. _--skip-systemd-native_ 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)](https://www.chedong.com/phpMan.php/man/deb-systemd-invoke/1p/markdown) ## STATUS CODES Should an init script be executed, **invoke-rc.d **always returns the status 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 status 0 (note that a fall‐ back 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 ef‐ fect. **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 success‐ fully 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 malfunction. 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 effect. **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 requested action, and supplied an allowed fallback action to be used instead. ## INIT SCRIPT POLICY **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 immediate ones being avoiding that package upgrades start daemons out-of-runlevel, and that a package starts or stops daemons while inside a chroot jail. The policy layer has the following abilities: deny or approve the execution of an action; re‐ quest 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 service is disabled. Other policies are imple‐ mented with the use of the **policy-rc.d **helper, and are only available if **/usr/sbin/pol‐** **icy-rc.d **is installed in the system. ## FILES **/etc/init.d/*** System V init scripts. ### /usr/sbin/policy-rc.d Init script policy layer helper (not required). **/etc/rc?.d/*** System V runlevel configuration. ## NOTES **invoke-rc.d **special cases the _status_ action, and returns exit status 4 instead of exit status 0 when it is denied. ## BUGS See _ and _. ## SEE ALSO _Debian_ _Policy_ _manual_, **/etc/init.d/skeleton**, [**update-rc.d**(8)](https://www.chedong.com/phpMan.php/man/update-rc.d/8/markdown), [**init**(8)](https://www.chedong.com/phpMan.php/man/init/8/markdown), ### /usr/share/doc/init-system-helpers/README.policy-rc.d.gz ## AUTHOR Henrique de Moraes Holschuh License: GNU General Public License v2 or Later (GPLv2+) ## COPYRIGHT 2001 Henrique de Moraes Holschuh 1 March 2001 [_INVOKE-RC.D_(8)](https://www.chedong.com/phpMan.php/man/INVOKE-RC.D/8/markdown)