Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

caffeinate(8) [osx man page]

CAFFEINATE(8)						    BSD System Manager's Manual 					     CAFFEINATE(8)

NAME
caffeinate -- prevent the system from sleeping on behalf of a utility SYNOPSIS
caffeinate [-disu] [-t timeout] [utility] [argument ...] DESCRIPTION
caffeinate creates assertions to alter system sleep behavior. If no assertion flags are specified, caffeinate creates an assertion to pre- vent idle sleep. If a utility is specified, caffeinate creates the assertions on the utility's behalf, and those assertions will persist for the duration of the utility's execution. Otherwise, caffeinate creates the assertions directly, and those assertions will persist until caffeinate exits. Available options: -d Create an assertion to prevent the display from sleeping. -i Create an assertion to prevent the system from idle sleeping. -m Create an assertion to prevent the disk from idle sleeping. -s Create an assertion to prevent the system from sleeping. This assertion is valid only when system is running on AC power. -u Create an assertion to declare that user is active. If the display is off, this option turns the display on and prevents the display from going into idle sleep. If a timeout is not specified with '-t' option, then this assertion is taken with a default of 5 second timeout. -t Specifies the timeout value in seconds for which this assertion has to be valid. The assertion is dropped after the specified time- out. Timeout value is not used when an utility is invoked with this command. EXAMPLE
caffeinate -i make caffeinate forks a process, execs "make" in it, and holds an assertion that prevents idle sleep as long as that process is running. SEE ALSO
pmset(1) LOCATION
/usr/bin/caffeinate Darwin November 9, 2012 Darwin

Check Out this Related Man Page

Test::Unit::Assertion(3pm)				User Contributed Perl Documentation				Test::Unit::Assertion(3pm)

NAME
Test::Unit::Assertion - The abstract base class for assertions NAME
Any assertion class that expects to plug into Test::Unit::Assert needs to implement this interface. Required methods new Creates a new assertion object. Takes whatever arguments you desire. Isn't strictly necessary for the framework to work with this class but is generally considered a good idea. do_assertion This is the important one. If Test::Unit::Assert::assert is called with an object as its first argument then it does: $_[0]->do_assertion(@_[1 .. $#_]) || $self->fail("Assertion failed"); This means that "do_assertion" should return true if the assertion succeeds and false if it doesn't. Or, you can fail by throwing a Test::Unit::Failure object, which will get caught further up the stack and used to produce a sensible error report. Generally it's good practice for do_assertion to die with a meaningful error on assertion failure rather than just returning false. AUTHOR
Copyright (c) 2001 Piers Cawley <pdcawley@iterative-software.com>. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
o Test::Unit::Assert o Test::Unit::CodeRef o Test::Unit::Regexp perl v5.8.8 2006-09-13 Test::Unit::Assertion(3pm)
Man Page

12 More Discussions You Might Find Interesting

1. HP-UX

timeout

How can I kick a user out after being idle for a certain amount of time, would prefer not to use scripts, will TMOUT work on HP-UX? (5 Replies)
Discussion started by: csaunders
5 Replies

2. Shell Programming and Scripting

perl: sleeping during a command

hello everyone, i am attempting to run the sleep function (i've also tried select) during the execution of a command to mimic a status. for example: # this is a terminal screen # here the process is executed # below this a status is displayed while the command executes like so:... (3 Replies)
Discussion started by: effigy
3 Replies

3. UNIX for Dummies Questions & Answers

solaris telnet idle timeout

I have put TMOUT=1800;export TMOUT in the /etc/profile, put it does not work, by the way the root default shell is sh. but I wana every one including root to terminate the session after setting idle for 1800 seconds. thank for the help. (1 Reply)
Discussion started by: kahn630
1 Replies

4. UNIX for Advanced & Expert Users

my process is going to sleep mode after 12 hours but i need my process in in firsy pr

hi all I process is sleeping after 12 hours but i need to be run this to 24 hours but it goes in sleep mode after 12 hours what should i do to make process always running.Kindly give me suggestion. (0 Replies)
Discussion started by: mukesh_rakesh1
0 Replies

5. UNIX for Advanced & Expert Users

How to prevent job1 from running while job2 is running..

Hi, Please I need your expert advise on how to prevent/lock from execution job1 while job2 is still running in Unix... THanks:) (3 Replies)
Discussion started by: tikang
3 Replies

6. Red Hat

telnet idle timeout on Redhat kernel 2.4.35.4

Hello, I've searched this forum for telnet idle timeout problem. I tried to set timeout parameters in /etc/profile readonly TMOUT=10 export TMOUT This doesn't work for Redhat kernel 2.4.35.4. It's really frustrating. Can anybody tell me what else I could try? Thanks a lot! jing (0 Replies)
Discussion started by: jing han
0 Replies

7. Forum Support Area for Unregistered Users & Account Problems

tinylogin telnet idle timeout

Hello, I have a busybox with tinylogin. How can I log user out when I found the telnet session is idle for 10 seconds? I set TMOUT=10 export TMOUT in /etc/profile I found it doesn't work for me. Can anybody help me? Thanks a lot! jing (1 Reply)
Discussion started by: jing han
1 Replies

8. Solaris

How to create a simple background script on Solaris

I have a local account for a unix server. The idle timeout for the account is around 10 mins. I have to login to the server multiple times during the day. Is there a way to increase the idle timeout or may be a script that I can run on background so it is not idle. Something like echo date every 9... (3 Replies)
Discussion started by: vinaysa
3 Replies

9. UNIX for Dummies Questions & Answers

Sleep command not sleeping for specified time.

Hi, I have ascript with a recursive funtion below. I have mentioned to sleep for 60minutes but it doesnt doing so. Its keep on running until if /elif conditions satiesfies. Can you pls help what is wrong here. funcstatus () { if then echo "`date` - Current status... (2 Replies)
Discussion started by: gaddamja
2 Replies

10. SCO

User process information and idle times

My company uses a proprietary GUI to its business system (Strategix) which runs on Windows clients, whereas the back-end runs on a SCO OpenServer 5.0.6a server. We're moving to a new business system next year and the business is growing and we're running out of licences on Strategix and making... (1 Reply)
Discussion started by: mmcardle
1 Replies

11. Shell Programming and Scripting

Help about bash process

I have function f1 and f2, I want it excute five items with different function in the list the the same time with process. I did a testing in start_build_feature1, it sleep about 100s, in the sleeping start_build_feature2 print nothing, can someone help me modify this scripts I don't when... (2 Replies)
Discussion started by: yanglei_fage
2 Replies

12. UNIX for Dummies Questions & Answers

GNU Linux sleeping processes in top command

hi all sleeping processes in the following output , are they doing anything , but consuming lot of sources, should I need to kill them , how to know , , what they are doing and the output says out of 260 processes only 9 are running , and 251 are sleeping , what does the sleeping means, can... (8 Replies)
Discussion started by: sidharthmellam
8 Replies

Featured Tech Videos