0 is EOF _for_reads_. For writes it is not very well defined
Hmm.
So -EFBIG is certainly the preferable return value,
Yes. The Austin 6th draft writes
EFBIG:
An attempt was made to write a file that exceeds the implementation-defined
maximum file size or the process' file size limit, and there was no room for
any bytes to be written.
Andries
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