NAME

prevent-sleep - Prevent system from sleeping

VERSION

This document describes version 0.005 of prevent-sleep (from Perl distribution App-PowerManagementUtils), released on 2020-09-25.

SYNOPSIS

Usage:

% prevent-sleep [--debug] [--format=name] [--json] [--log-level=level]
    [--(no)naked-res] [--page-result[=program]] [--quiet] [--trace]
    [--verbose]

DESCRIPTION

Will also prevent system from hybrid sleeping, suspending, or hibernating. The effect is permanent (survives reboot); you need to unprevent_sleep() to reverse the effect.

Note that this does not prevent screen blanking or locking (screensaver activating); see Screensaver::Any for routines that disable screensaver.

On systems that run Systemd, this is implemented by masking sleep.target. It automatically also prevents suspend.target, hybrid-sleep.target, and hibernate.target from activating. (Note that masking systemd-suspend.service should also achieve the same result.)

Not implemented yet for other systems. Patches welcome.

OPTIONS

* marks required options.

Logging options

--debug

Shortcut for --log-level=debug.

--log-level=s

Set log level.

--quiet

Shortcut for --log-level=error.

--trace

Shortcut for --log-level=trace.

--verbose

Shortcut for --log-level=info.

Output options

--format=s

Choose output format, e.g. json, text.

Default value:

undef

--json

Set output format to json.

--naked-res

When outputing as JSON, strip result envelope.

Default value:

0

By default, when outputing as JSON, the full enveloped result is returned, e.g.:

[200,"OK",[1,2,3],{"func.extra"=>4}]

The reason is so you can get the status (1st element), status message (2nd element) as well as result metadata/extra result (4th element) instead of just the result (3rd element). However, sometimes you want just the result, e.g. when you want to pipe the result for more post-processing. In this case you can use `--naked-res` so you just get:

[1,2,3]

--page-result

Filter output through a pager.

Other options

--help, -h, -?

Display help message and exit.

--version, -v

Display program's version and exit.

COMPLETION

This script has shell tab completion capability with support for several shells.

bash

To activate bash completion for this script, put:

complete -C prevent-sleep prevent-sleep

in your bash startup (e.g. ~/.bashrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.

It is recommended, however, that you install modules using cpanm-shcompgen which can activate shell completion for scripts immediately.

tcsh

To activate tcsh completion for this script, put:

complete prevent-sleep 'p/*/`prevent-sleep`/'

in your tcsh startup (e.g. ~/.tcshrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.

It is also recommended to install shcompgen (see above).

other shells

For fish and zsh, install shcompgen as described above.

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/App-PowerManagementUtils.

SOURCE

Source repository is at https://github.com/perlancar/perl-App-PowerManagementUtils.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=App-PowerManagementUtils

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2020, 2019 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

cpanm App::PowerManagementUtils

perl -MCPAN -e shell
install App::PowerManagementUtils