Another reason why a few sources should come with binary licenses

[Peter Klosky]

XXX
> For security make your /tmp file 0600 mode.

Security?
This seems dubious.  My idea of secure includes being able to
read back what was written, possibly from another process.  
/tmp is world writeable.  This means that anyone can unlink tmp files. 

In particular, my application wants to pass state data from a child
process to a parent prodcess via a tmp file that the child creates,
and there are windows of vulnerability in this scheme, due to the unlink
trouble.