TIL FIPS actually accomplished _something_ very good.pic.twitter.com/IJDMAzFrMA
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There's fundamentally no valid way to use EINTR short of hammering signals with exponential backoff (inherent race condition otherwise)...
So my view is that installing signal handlers without SA_RESTART is almost always a bug.
I generally don't write or recommend EINTR retry loops, because the only conceivable reason to install a signal handler without SA_RESTART..
...is that you want to be able to force operations to error out by sending a signal (which only works w/o races if you hammer it...).
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