Re: Latest kernel source

Richard B. Johnson (
Thu, 27 Feb 1997 10:19:29 -0500 (EST)

On Thu, 27 Feb 1997, Joerg Pommnitz wrote:

> This is OK. It's not supposed to core dump or to do anything useful
> at all. Programs like this used to generate annoying "Exception at"
> messages, but the priority of this message has been changed to DEBUG.
> If you want to see them, tell your klogd to show them.
> Anyway, the current behaviour is completely in spec. POSIX only
> specifies what happens with correct programs.
> Best regards
> Joerg

Syslog is enabled even for info. This program is an example of incorrect
behavior which isolates the incorrect behavior. It is not supposed to be
a "correct" program. The null-pointer could very well have been obtained
in a deeply-nested linked-list in which the return from malloc() was not
properly checked. Such a bug should never go undetected. Such bugs may
occur very rarely as a result of the execution of sections of code that
are very rarely executed.

The file descriptor could have been that of a DEVICE. And that DEVICE
may have been what was necessary to turn OFF a motor. The result could
have been that the entire contents of a ladle of molten iron gets dumped
into the parking lot. We really have a duty to help. There is more
than POSIX involved. There is a catchall called "Good Standards of
Engineering Practice".

Dick Johnson
Richard B. Johnson
Project Engineer
Analogic Corporation
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