Munin::...Service(3)

💖 Munin::...Service(3) 💖

okay bestie, welcome to the User Contributed Perl Documentation for Munin::...Service(3) — we're literally about to make Munin service handling make sense, no cap 🫶

✨ NAME ✨

Munin::Node::Service — methods related to handling of Munin services. That's the whole vibe: it's the little toolkit for dealing with services 💅

🌈 SYNOPSIS 🌈

my $services = Munin::Node::Service->new(timeout => 30);
$services->prepare_plugin_environment;
if ($services->is_a_runnable_service($file_name)) {
   $services->fork_service($file_name);
}

🌟 METHODS 🌟

💫 new 💫

my $services = Munin::Node::Service->new(%args);

Constructor. Every argument is optional, fr fr. The valid arguments are:

• "servicedir" — the directory that will be searched for services 🔍
• "defuser", "defgroup" — the default uid and gid that services will run as. Service-specific user and group directives (as set by the service configuration files) will override this, periodt 👑
• "timeout" — the default timeout for services. Services taking longer than this to run will be killed 💀. Service-specific timeouts (as set in the service configuration files) will override this value.

💫 is_a_runnable_service 💫

my $bool = $services->is_a_runnable_service($file_name);

Runs miscellaneous tests on $file_name in the service directory, to try and establish whether it is a runnable service. It's giving vibe check for services 🔍✨

💫 list 💫

my @services = $services->list;

Returns a list of all the runnable services in the directory. Slay, a whole roster 👑

💫 prepare_plugin_environment 💫

$services->prepare_plugin_environment(@services);

Carries out various tasks that plugins require before being run, such as loading service configurations and exporting common environment variables. Basically pre-game prep for plugins 🎀

💫 export_service_environment 💫

$services->export_service_enviromnent($service);

Exports all the environment variables specific to service $service. And yes, the code block above is spelled exactly like the original — copy it as-is, bestie 🙈

💫 change_real_and_effective_user_and_group 💫

$service->change_real_and_effective_user_and_group($service);

Changes the current process' effective group and user IDs to those specified in the configuration, or the default user or group otherwise. Also changes the real group and user IDs if the operating system supports it.

On failure, causes the process to exit. So like, it does not play around 😭

💫 exec_service 💫

$service->exec_service($service, [@arguments]);

Replaces the current process with an instance of service $service in $directory, running with the correct environment and privileges.

This function never returns. The process will exit(2) if the service to be run failed the paranoia check. So it's not coming back — it literally becomes the service. Main character energy, honestly 👑🔥

💫 fork_service 💫

$result = $service->fork_service($service, [$argument]);

Identical to exec_service(), except it runs the service in a subprocess. If the service takes longer than the timeout, it will be terminated 💀

Returns a hash reference containing (among other things) the service's output and exit value. (See documentation for run_as_child() in Munin::Node::Service for a comprehensive description.)

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xoxo, your Unix bestie 💅 this page is from perl v5.42.3, dated 1980-01-01, and the manual is literally Munin::...Service(3) — periodt 🫶