Re: [PATCH] getrusage sucks

[David Wagner]

Claudio Scordino  wrote:
>Does exist any _real_ reason why getrusage can't be invoked by a task to know 
>statistics of another task ?

Probably only super-user should be permitted to read the usage information
about other processes.  Allowing anyone to read anyone else's rusage would
open up a bunch of side channels that sound pretty dangerous.  For instance,
user #1 might be able to mount a timing attack against crypto code being
executed by user #2, and that doesn't sound good.
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