/*
	File: readalias.m
	Version: 1.1
	Author: Damien Bobillot (damien.bobillot.2002_mkalias@m4x.org)
	Licence: GNU GPL
	Compatibility: Mac OS X 10.4 (may work on MacOS X 10.0)
	
	Print the orginal path of a Mac OS X alias.
	
	usage: readalias <alias file>
	
	05/08/2005 - 1.0 - First version
	05/11/2006 - 1.1 - Compiled as Universal Binary
*/

#include <stdio.h>
#include <Foundation/Foundation.h>
#include <Carbon/Carbon.h>

int main(int argc, char* argv[]) {
	OSStatus err;	
	if (argc != 2) {
		fprintf(stderr,"usage: readalias <alias file>\n");
		return 1;
	}
	
	// Create FSRef
	FSRef aliasRef;
	require_noerr(err = FSPathMakeRef((UInt8*)argv[1], &aliasRef, NULL), readError);
	
	// Check it file is an alias
	Boolean isAlias, isFolder;
	require_noerr(err = FSIsAliasFile(&aliasRef, &isAlias, &isFolder), readError);
	if(!isAlias) goto testAliasError;
	
	// Resolve alias file
	require_noerr(err = FSResolveAliasFile(&aliasRef, false, &isFolder, &isAlias), readError);
	
	// Print original path
	UInt8 originalPath[512];
	require_noerr(err = FSRefMakePath(&aliasRef, originalPath, 512), printError);
	printf("%s\n", originalPath);
	
	return 0;

readError:
	fprintf(stderr,"readalias: Cannot read alias file (%d)\n", (int)err);
	return 1;	
testAliasError:
	fprintf(stderr,"readalias: Not an alias\n");
	return 1;
printError:
	fprintf(stderr,"readalias: Cannot print orignal path (%d)\n", (int)err);
	return 1;
}