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From: grady@ic.Berkeley.EDU (Steven Grady)
Newsgroups: comp.unix.questions,comp.unix.wizards,comp.lang.c
Subject: Re: argv ==> stdin (fast)
Message-ID: <1137@ucbcad.BERKELEY.EDU>
Date: Thu, 20-Nov-86 07:02:13 EST
Article-I.D.: ucbcad.1137
Posted: Thu Nov 20 07:02:13 1986
Date-Received: Thu, 20-Nov-86 22:45:33 EST
References: <2972@rsch.WISC.EDU>
Sender: news@ucbcad.BERKELEY.EDU
Reply-To: grady@ic.Berkeley.EDU (Steven Grady)
Organization: University of California, Berkeley
Lines: 35
Keywords: make the commandline look like a file?
Xref: mnetor comp.unix.questions:128 comp.unix.wizards:126 comp.lang.c:112

I hope someone comes up with a good solution, because I'm not satisfied
with the way I had to handle it:

#include <stdio.h>

/* Make a file pointer point to a string */
FILE *
set_fp_to_str(fp, str)
FILE *fp;
char *str;
{

	/* Check out the src to sscanf, etc, for more fun.. */
	fp->_flag = _IOREAD|_IOSTRG;
	fp->_ptr = fp->_base = str;
	fp->_cnt = 0;
	while (*str++) {
	        fp->_cnt++;
	}
	fp->_bufsiz = fp->_cnt;
    	return(fp);
}

/* Use yyparse() on a string */
foo(str)
char *str;
{
	FILE tmp;

	/* Save old value of stdin */
	tmp = *stdin;
	set_fp_to_str(stdin, str);
	yyresult = yyparse();
	*stdin = tmp;
}