Splitting fullPath into fullPath, which should resolve symlinks and find only real paths, and absPath, which should not.

std/cpp/_std/sys/FileSystem.hx

@@ -53,6 +53,11 @@ class FileSystem {
 		return new String(file_full_path(relPath));
 	}
 
+	public static function absPath ( relPath : String ) : String {
+		if (haxe.io.Path.isAbsolute(relPath)) return relPath;
+		return haxe.io.Path.join([Sys.getCwd(), relPath]);
+	}
+
 	static function kind( path : String ) : FileKind {
 		var k:String = sys_file_type(haxe.io.Path.removeTrailingSlashes(path));
 		return switch(k) {

std/cs/_std/sys/FileSystem.hx

@@ -82,6 +82,11 @@ class FileSystem {
 		return new FileInfo(relPath).FullName;
 	}
 
+	public static function absPath ( relPath : String ) : String {
+		if (haxe.io.Path.isAbsolute(relPath)) return relPath;
+		return haxe.io.Path.join([Sys.getCwd(), relPath]);
+	}
+
 	public static function isDirectory( path : String ) : Bool
 	{
 		var isdir = Directory.Exists(path);
@@ -124,4 +129,4 @@ class FileSystem {
 		return cs.Lib.array( ret );
 	}
 
-}
+}

std/haxe/io/Path.hx

@@ -299,4 +299,13 @@ class Path {
 		}
 		return path;
 	}
+
+	/**
+		Returns true if the path is an absolute path, and false otherwise.
+	**/
+	public static function isAbsolute ( path : String ) : Bool {
+		if (StringTools.startsWith(path, '/')) return true;
+		if (path.charAt(2) == ':') return true;
+		return false;
+	}
 }

std/java/_std/sys/FileSystem.hx

@@ -61,7 +61,12 @@ class FileSystem {
 
 	public static function fullPath( relPath : String ) : String
 	{
-		return new File(relPath).getAbsolutePath();
+		return new File(relPath).getCanonicalPath();
+	}
+
+	public static function absPath ( relPath : String ) : String {
+		if (haxe.io.Path.isAbsolute(relPath)) return relPath;
+		return haxe.io.Path.join([Sys.getCwd(), relPath]);
 	}
 
 	public static function isDirectory( path : String ) : Bool

std/neko/_std/sys/FileSystem.hx

@@ -50,6 +50,11 @@ class FileSystem {
 		return new String(file_full_path(untyped relPath.__s));
 	}
 
+	public static function absPath ( relPath : String ) : String {
+		if (haxe.io.Path.isAbsolute(relPath)) return relPath;
+		return haxe.io.Path.join([Sys.getCwd(), relPath]);
+	}
+
 	static function kind( path : String ) : FileKind {
 		var k = new String(sys_file_type(untyped (haxe.io.Path.removeTrailingSlashes(path)).__s));
 		return switch(k) {

std/php/_std/sys/FileSystem.hx

@@ -63,6 +63,11 @@ class FileSystem {
 			return p;
 	}
 
+	public static function absPath ( relPath : String ) : String {
+		if (haxe.io.Path.isAbsolute(relPath)) return relPath;
+		return haxe.io.Path.join([Sys.getCwd(), relPath]);
+	}
+
 	static function kind( path : String ) : FileKind {
 		var k = untyped __call__("filetype", path);
 		switch(k) {

std/python/_std/sys/FileSystem.hx

@@ -53,7 +53,12 @@ class FileSystem {
 	}
 
 	public static function fullPath( relPath : String ) : String {
-		return Path.abspath(relPath);
+		return Path.realpath(relPath);
+	}
+
+	public static function absPath ( relPath : String ) : String {
+		if (haxe.io.Path.isAbsolute(relPath)) return relPath;
+		return haxe.io.Path.join([Sys.getCwd(), relPath]);
 	}
 
 	public static function isDirectory( path : String ) : Bool
@@ -77,4 +82,4 @@ class FileSystem {
 		return Os.listdir(path);
 	}
 
-}
+}

std/sys/FileSystem.hx

@@ -55,12 +55,22 @@ extern class FileSystem {
 
 	/**
 		Returns the full path of the file or directory specified by `relPath`,
-		which is relative to the current working directory.
+		which is relative to the current working directory. Symlinks will be 
+		followed and the path will be normalized.
 
 		If `relPath` is null, the result is unspecified.
 	**/
 	static function fullPath( relPath : String ) : String;
 
+	/**
+		Returns the full path of the file or directory specified by `relPath`,
+		which is relative to the current working directory. The path doesn't 
+		have to exist.
+
+		If `relPath` is null, the result is unspecified.
+	**/
+	static function absPath( relPath : String ) : String;
+
 	/**
 		Tells if the file or directory specified by `path` is a directory.