I wouldn't be so sure that SA_RESTART is the right thing, because using SA_RESTART means you have to do actual work inside your signal handlers. The nice thing

I wouldn't be so sure that SA_RESTART is the right thing, because using SA_RESTART means you have to do actual work inside your signal handlers. The nice thing about EINTR is your signal handlers can be dumb, and just set a "got_signal = true" variable, so you know 100% for sure your signal handler is signal safe. Then your read() loop just ignores EINTR and checks that variable, to know when it needs to do work.