Filter Help

Paul Conklin paul.conklin at cerner.com
Thu Nov 24 18:03:53 PST 2011


> > I'm trying to write a filter that integrates with a 3rd party app.  Their requirments are that I call their exe and pass it a page at a time.  I can parse the file into pages (they need it in PCL) via ghostscript, but where I'm having problems is figuring out how many pages there are.
> >
> > /usr/bin/gs -dQUIET -dPARANOIDSAFER -dNOPAUSE -dBATCH -dNOMEDIAATTRS -sDEVICE=ljet4 -sstdout=%stderr -sOUTPUTFILE=$TMPDIR/$PRINTER-$$-%03d.pcl $6
> > 	for file in `/bin/ls $TMPDIR/$PRINTER-$$-*`
> >
> > D [24/Nov/2011:17:01:53 -0800] [Job 21] /usr/lib/cups/filter/troysecurerx: line 12: /bin/ls: cannot execute [Permission denied]
> >
> >
> > it looks like I can't ls the files.
> >
> > Any help would be greatly appreciated.
>
> Just so you all can see ls and gs have the same permissions
>
> [root at localhost tmp]# ls -l /bin/ls
> -rwxr-xr-x 1 root root 95116 Jul 21 18:17 /bin/ls
> [root at localhost tmp]# ls -l /usr/bin/gs
> -rwxr-xr-x 1 root root 8424 Sep 13 07:48 /usr/bin/gs

So, it gets odder...
if I copy ls to /usr/bin instead of just bin, it works (same permissions)
/usr/bin and /bin have the same permissions and owner
if i create a softlink from /usr/bin/ls to /bin/ls it still fails (same error as above) what is it that the filter isn't co-operating with /bin?




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