At 2005-03-14 16:25:22 -0500, pgsql@mohawksoft.com wrote:
>
> > "The file descriptor returned by open is the lowest numbered unused
> > descriptor. [...]
>
> What is meant by "unused?"
Perhaps you should actually look at the standard.
"The open( ) function shall return a file descriptor for the named file that is the lowest file descriptor not
currentlyopen for that process."
"The close( ) function shall deallocate the file descriptor indicated by fildes. To deallocate means to make the file
descriptoravailable for return by subsequent calls to open( ) or other functions that allocate file descriptors."
> Is it read to mean that a higher number file is *never* returned if
> there is a lower number that has been used and is now available?
Yes.
-- ams