DESCRIPTION
caffeinate creates assertions to alter system sleep behavior. If no assertion flags are specified, caffeinate creates an assertion to prevent 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 timeout. Timeout value is not used when an utility is invoked with this command.
-w Waits for the process with the specified pid to exit. Once the the process exits, the assertion is also released.
This option is ignored when used with utility option.
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.
I’ll say this again. So, you folks know that there is a built-in CLI utility for this on macOS, right? ``` $ which caffeinate /usr/bin/caffeinate ```
And there’s a man page for it?
``` $ man caffeinate
CAFFEINATE(8) System Manager's Manual CAFFEINATE(8)
NAME caffeinate – prevent the system from sleeping on behalf of a utility
SYNOPSIS caffeinate [-disu] [-t timeout] [-w pid] [utility arguments...]
DESCRIPTION caffeinate creates assertions to alter system sleep behavior. If no assertion flags are specified, caffeinate creates an assertion to prevent 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:
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 ```
[flagged]