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Date: Thu, 19 Dec 2019 03:37:14 -0500
From: Alex Brachet-Mialot <>
To: "" <>
Subject: mmap implementation confusion

In src/mman/mmap.c mmap (after light einval checks) just returns the result
of the syscall directly. But presumably the OS returns -E* and not -1 for
all failures. Otherwise something like EBADF could never go reported.
Presumably musl is compliant here and returns -1 on error and not the
negative value from the OS but I’m not seeing that logic. Am I missing
something here? Thanks.


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