Subject: Re: printcap, banners, and PostScript...
To: None <current-users@NetBSD.ORG>
From: Brad Spencer <>
List: current-users
Date: 01/20/1996 19:44:06

>> If the first two characters are "%!", it's PostScript.
>> Hmm, this is fairly easy.  Just get a decent printer filter.  [...]
>> PS files always start with !#PS, so you can recognize them quite easy.
>Once more: this is a reasonable guess, but only a guess; it is
>perfectly valid for text files to start with %!, or PostScript programs
>to not start with a comment.  (Requiring PostScript code to start with
>a comment is as silly as cc refusing to compile something that doesn't
>start with /*.)


I believe that I have run into duel mode laser printers which use '%!'
[and perhaps other hints] to figure out to itself that the following
would be Postscript as opposed to whatever other mode it also
supported.  The place I was at was not in the habit of printing text
with '%!' as the first two characters, so I am not sure I ever saw a
mis-guess.  Point taken, however....

Brad Spencer -