Article View: comp.lang.postscript
Article #139Re: How do I recognize postscript from a file
From: Arto V. Viitanen
Date: Wed, 04 Nov 1992 07:54
Date: Wed, 04 Nov 1992 07:54
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>>>>> On 3 Nov 92 11:14:48 GMT, eweingar@loanshark.cs.indiana.edu (Peter Weingartner) said: Peter> In article <1992Nov3.083527.20756@ugle.unit.no> helgeaa@colargol (Helge O. Aarstein) writes: Peter> We are trying to make a filter for the lp-command to reject Peter> non-postscript files. But, there is a problem: Peter> How can I be sure that the file contains postscript- Peter> code? Peter> The simplest way is probably to check to see that the first two Peter> characters of the file are '%!'. When printing from MS Windows to Postscript file, the file (if you don't make it not to) starts with characters ^D%! (i.e. control-D, %, !). In a way, this is right way, since ^D means end-of-job to a Postscript printer, so previous job is stopped. I only thought to say this, since lpr-filter on our department checks the %! -pair, and several times Postscript document has been run through Ascii-to-PS filter. -- Arto V. Viitanen email: av@uta.fi University Of Tampere, av@cs.uta.fi Finland
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Path: arc1-ca.pugleaf.net!sparky!uunet!usc!zaphod.mps.ohio-state.edu!uwm.edu!spool.mu.edu!agate!doc.ic.ac.uk!uknet!mcsun!news.funet.fi!uta!kielo!av From: av@kielo.uta.fi (Arto V. Viitanen) Newsgroups: comp.lang.postscript Subject: Re: How do I recognize postscript from a file Message-ID: <AV.92Nov4095431@kielo.uta.fi> Date: 4 Nov 92 07:54:30 GMT References: <1992Nov3.083527.20756@ugle.unit.no> <EWEINGAR.92Nov3111448@loanshark.cs.indiana.edu> Sender: news@uta.fi Reply-To: av@uta.fi (Arto V. Viitanen) Organization: University of Tampere, Finland Lines: 23 Nntp-Posting-Host: kielo In-reply-to: eweingar@loanshark.cs.indiana.edu's message of 3 Nov 92 11:14:48 GMT