How do I recognize postscript from a file

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#120

From: Helge O. Aarstein
Date: Tue, 03 Nov 1992 08:35

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We are trying to make a filter for the lp-command to reject 
non-postscript files. But, there is a problem: 
	How can I be sure that the file contains postscript-
	code?

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Helge O Aarstein |                                 | helgeaa at
Sverresgt. 8     |---------------------------------| viper.edb.tih.no
N-7013 Trondheim | You will still be here tomorrow |
Phone: 07-502782 | - but your dreams may not. (CS) |

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From: helgeaa@colargol (Helge O. Aarstein)
Newsgroups: comp.lang.postscript
Subject: How do I recognize postscript from a file
Message-ID: <1992Nov3.083527.20756@ugle.unit.no>
Date: 3 Nov 92 08:35:27 GMT
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