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From: glmwc@marlin.jcu.edu.au (Matt Crowd)
Newsgroups: comp.sys.amiga.programmer
Subject: C questions (again)
Message-ID: <1991Feb7.114348.10577@marlin.jcu.edu.au>
Date: 7 Feb 91 11:43:48 GMT
Organization: James Cook University
Lines: 52

Ok, I've just about given up after only getting 1 reply to the
problem with 2 programs not working with SAS 5.1 system() call.

I've changed the programs around to this : (couldn't avoid
the Amiga specific code)

Program1 :
#include <stdio.h>
#include <dos.h>
#include <exec/exec.h>

struct DosBase *DosBase;

main()
{
	struct FileHandle *input;
 	if(!(DosBase = (struct DosBase *) OpenLibrary("dos.library")))
	{
		printf("Open lib failed.\n");
		exit(0);
	}
	input = (struct FileHandle *) Input(); // get filehandle of stdin	
	printf("This is program 1!\n");
	Execute("program2",input,0); // run program2
	printf("Because of something very wierd, this line "
	"will not be printed.  I do not know why.\n");
}

Program2:
#include <stdio.h>
char buff[200];
main()
{	
	scanf("%s",buff);
	printf("String was - %s\n",buff);
}

What is going on?  Now I can get the scanf to work, but output
and input disappears from program 1.  I think that program 2 must
be closing stdin/stdout when it finishes, but putting an abort/Exit
at the end of program 2 didn't work either.  How can I keep the
input/output?  This is for a larger program but if I could solve
this simple example it would work in the larger case.  Does this mean
I have no choice but to learn how to use the CON: device and
get the address of the CLI window etc. etc. etc.???  I am new
to Amiga specific coding and my experiences so far indicate it's
not going to be much fun.....

Help!

Thanks,
Colin Adams