Subject: Re: sgml source filenames? From: Brandon Ibach <bibach@xxxxxxxxxxxxxx> Date: Tue, 9 May 2000 18:15:37 -0500 |
Quoting Matthias Clasen <clasen@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>: > > > > <!doctype style-sheet PUBLIC "-//James Clark//DTD DSSSL Style Sheet//EN" [ > > > <!entity stdin SYSTEM "<osfd>0"> > > > ]> > > > (define %output-dir% "&stdin;") > > > > that's scary - i like it ;) > > > > But shouldn't it be &stdout; instead of &stdin; ? > Nope, file descriptor 0 is standard input, 1 is standard output, and 2 is standard error. On this note, for those of you who enjoyed this technique, you can take it even further to read in a variety of external information. You could either use the shell to concatenate a series of pieces of information, then parse them back apart in your DSSSL code, or you could use a stylesheet like this: <!doctype style-sheet PUBLIC "-//James Clark//DTD DSSSL Style Sheet//EN" [ <!entity stdin SYSTEM "<osfd>0"> <!entity fd3 SYSTEM "<osfd>3"> <!entity fd4 SYSTEM "<osfd>4"> ]> <style-specification> (declare-flow-object-class formatting-instruction "UNREGISTERED::James Clark//Flow Object Class::formatting-instruction") (root (make formatting-instruction data: "Input: &stdin; &fd3; &fd4;")) </style-specification> with this (rather clunky) command line: uname -m | (exec 4<&0; uname -r | (exec 3<&0; uname -s | jade -t sgml -d inparam.dsl test.sgml)) This works in the bash shell (which is what most Linux distributions have, by default, nowadays), but should work in just about any bourne-compatible shell. It uses a series of subshells to redirect standard input (fd 0) into other file descriptors. Of course, it may just be easier to redirect the output of the uname commands into temporary files and have the entities reference those. -Brandon :) DSSSList info and archive: http://www.mulberrytech.com/dsssl/dssslist
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