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Came across this function and couldn't intuitively define the implied name. No search on stack quickly returned the answer.

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"Resource Usage"

Reports resource usage totals for processes specified by processes, storing the information in *rusage.

In most systems, processes has only two valid values:

RUSAGE_SELF Just the current process.

RUSAGE_CHILDREN All child processes (direct and indirect) that have already terminated.

The return value of getrusage is zero for success, and -1 for failure.

http://www.gnu.org/software/libc/manual/html_node/Resource-Usage.html

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