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From: mcvoy@rsch.WISC.EDU (Lawrence W. McVoy)
Newsgroups: comp.unix.questions,comp.unix.wizards,comp.lang.c
Subject: argv ==> stdin (fast)
Message-ID: <2972@rsch.WISC.EDU>
Date: Wed, 19-Nov-86 20:52:14 EST
Article-I.D.: rsch.2972
Posted: Wed Nov 19 20:52:14 1986
Date-Received: Wed, 19-Nov-86 22:13:25 EST
Organization: U of Wisconsin CS Dept
Lines: 31
Keywords: make the commandline look like a file?
Xref: mnetor comp.unix.questions:116 comp.unix.wizards:121 comp.lang.c:102

Hi there.  I'm using lex & yacc to do some work for me and I can't 
quite get it.   The scanner & parser part works, but only if it's 
getting input from stdin.  I diddled lex.yy.c to change the getc(yyin)
call in the input() define to call my routine which feed sit characters 
from argv.  This works if I call yylex() from main, but if yyparse calls 
it then I get a "syntax error".  The same program works if I don't
diddle the input() routine.  And I can't figure out what's wrong
with my diddling.....

So, I'm stuck.  Does anyone have a cute way to feed a short byte stream
to stdin backwards?  Or a better solution?  I'm not willing to do 
anything as kludgey as

	#!/bin/sh

	cat << EOF | my_problem_program
	$*
	EOF

But that is _exactly_ what I want to do, only faster (no sh start up).
I suppose I could do the fork() and feed the child the command line as 
stdin, but even that is sort of yucko.

All suggestions welcome, and apologies to unix-wizards, but I figure you
don't read unix-questions anymore :-(

-- 
Larry McVoy 	        mcvoy@rsch.wisc.edu, 
      		        {seismo, topaz, harvard, ihnp4, etc}!uwvax!mcvoy

"They're coming soon!  Quad-stated guru-gates!"