Help: close() returns -1

[Fred Fish]

In article <4369 at jpl-devvax.JPL.NASA.GOV> jackm at devvax.JPL.NASA.GOV (Jack Morrison) writes:
>I have written a simple driver for a parallel port on a Sun 3/260.
>Everything works except for one thing: close() returns an error
>status (-1), with errno=1 (not owner).

I don't know if it is related or not, but under SunOS 4.0 on a Sun-4,
a close() on the tape device /dev/rst8, after writing data to the tape,
returns a -1 with errno=EPERM.  Apparently none of the standard UNIX 
utilities that write to the tape drive bother to check the return status
of close()...  :-(

-Fred
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