Here are my gethostname.c and getdomainname.c diffs.

The change is to check for error && errno == ENOMEM, and restore errno
in this case, and return 0.

(As no standard mandates null-terminating, portable programs have to check
for the last byte != 0, or allocate one more and initialize that to 0, or
to use a maximum size output routine, anyway.)

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	-is