 the <b>ppmshadow</b> process.
If the <b>TMPDIR</b> environment variable is set, <b>ppmshadow</b> creates
the directory there instead of <b>/tmp</b>.

In normal operation, <B>ppmshadow</B> deletes each temporary file as
soon as it is done with it and leaves no debris around after it
completes.  To preserve the intermediate files for debugging, use the
<B>-k</B> command line option.

<p>The temporary files are: 
<DL COMPACT>

<DT><B>infile.ppm</b>
<DD>
A copy of the input.

<DT><B>bgmask.ppm</B>
<DD>
Positiv