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On Mon, 8 Dec 1997, Greg Hudson wrote:

> I quoth from read(2):
> 
>      Upon successful completion, read() and readv() return the number of bytes
>      actually read and placed in the buffer.  The system guarantees to read
>      the number of bytes requested if the descriptor references a normal file
>      that has that many bytes left before the end-of-file, but in no other
>      case.
> 
> It's not at all uncommon to rely on that assumption.  A lot of
> programs fstat() a file and then read in st_size bytes with no
> surrounding while loop.

Read will also do a short return if interrupted by a signal after
reading some data unless SA_RESTART has been set.

- --
				Jim Wise
				jim.wise@turner.com

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