Index: src/OFConstString.m
==================================================================
--- src/OFConstString.m
+++ src/OFConstString.m
@@ -10,10 +10,11 @@
  */
 
 #include "config.h"
 
 #import "OFConstString.h"
+#import "OFExceptions.h"
 
 #ifndef __objc_INCLUDE_GNU
 void *_OFConstStringClassReference;
 #endif
 
@@ -23,10 +24,15 @@
 {
 	objc_setFutureClass((Class)&_OFConstStringClassReference,
 	    "OFConstString");
 }
 #endif
+
+- autorelease
+{
+	return self;
+}
 
 - retain
 {
 	return self;
 }
@@ -38,10 +44,12 @@
 - (size_t)retainCount
 {
 	return SIZE_MAX;
 }
 
-- autorelease
+- (void)dealloc
 {
-	return self;
+	@throw [OFNotImplementedException newWithClass: isa
+					   andSelector: _cmd];
+	[super dealloc];	/* Get rid of stupid warning */
 }
 @end

Index: src/OFFile.h
==================================================================
--- src/OFFile.h
+++ src/OFFile.h
@@ -34,10 +34,26 @@
  * \param mode The mode in which the file should be opened as a string
  * \return A new autoreleased OFFile
  */
 + fileWithPath: (OFString*)path
        andMode: (OFString*)mode;
+
+/**
+ * \return An OFFile singleton for stdin
+ */
++ standardInput;
+
+/**
+ * \return An OFFile singleton for stdout
+ */
++ standardOutput;
+
+/**
+ * \return An OFFile singleton for stderr
+ */
++ standardError;
+
 /**
  * Changes the mode of a file.
  *
  * Not available on Windows.
  *
@@ -130,5 +146,9 @@
  */
 - (size_t)writeNItems: (size_t)nitems
 	       ofSize: (size_t)size
 	   fromBuffer: (const char*)buf;
 @end
+
+@interface OFFileSingleton: OFFile
+- initWithFilePointer: (FILE*)fp;
+@end

Index: src/OFFile.m
==================================================================
--- src/OFFile.m
+++ src/OFFile.m
@@ -21,17 +21,48 @@
 #endif
 
 #import "OFFile.h"
 #import "OFExceptions.h"
 
+static OFFileSingleton *of_file_stdin = nil;
+static OFFileSingleton *of_file_stdout = nil;
+static OFFileSingleton *of_file_stderr = nil;
+
 @implementation OFFile
 + fileWithPath: (OFString*)path
        andMode: (OFString*)mode
 {
 	return [[[self alloc] initWithPath: path
 				   andMode: mode] autorelease];
 }
+
++ standardInput
+{
+	if (of_file_stdin == nil)
+		of_file_stdin = [[OFFileSingleton alloc]
+		    initWithFilePointer: stdin];
+
+	return of_file_stdin;
+}
+
++ standardOutput
+{
+	if (of_file_stdout == nil)
+		of_file_stdout = [[OFFileSingleton alloc]
+		    initWithFilePointer: stdout];
+
+	return of_file_stdout;
+}
+
++ standardError
+{
+	if (of_file_stderr == nil)
+		of_file_stderr = [[OFFileSingleton alloc]
+		    initWithFilePointer: stderr];
+
+	return of_file_stderr;
+}
 
 + (void)changeModeOfFile: (OFString*)path
 		  toMode: (mode_t)mode
 {
 	/*
@@ -172,5 +203,42 @@
 	fp = NULL;
 
 	return self;
 }
 @end
+
+@implementation OFFileSingleton
+- initWithFilePointer: (FILE*)fp_
+{
+	self = [super init];
+
+	fp = fp_;
+
+	return self;
+}
+
+- autorelease
+{
+	return self;
+}
+
+- retain
+{
+	return self;
+}
+
+- (void)release
+{
+}
+
+- (size_t)retainCount
+{
+	return SIZE_MAX;
+}
+
+- (void)dealloc
+{
+	@throw [OFNotImplementedException newWithClass: isa
+					   andSelector: _cmd];
+	[super dealloc];	/* Get rid of stupid warning */
+}
+@end