To be clear, this is a design rather than an implementation question

I want to know the rationale behind why POSIX behaves this way. POSIX system calls when given an invalid memory location return EFAULT rather than crashing the userspace program (by sending a sigsegv), which makes their behavior inconsistent with userspace functions.

Why? Doesn't this just hide memory bugs? Is it a historical mistake or is there a good reason for it?

c segmentation-fault posix standards signals
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