Remove ancient unsafe native code.

All Javas have reasonably fine grained Thread.sleep these days, and we no
longer need to set our pid or gid or temporarily disable GC.

core/src/main/java/com/threerings/media/FrameManager.java

@@ -37,8 +37,6 @@ import com.samskivert.util.StringUtil;
 
 import com.samskivert.swing.RuntimeAdjust;
 
-import com.threerings.util.unsafe.Unsafe;
-
 import com.threerings.media.timer.CalibratingTimer;
 import com.threerings.media.timer.MediaTimer;
 import com.threerings.media.timer.MillisTimer;
@@ -640,7 +638,12 @@ public abstract class FrameManager
                 if (_perfDebug.getValue()) {
                     start = _timer.getElapsedMicros();
                 }
-                Unsafe.sleep(_sleepGranularity.getValue());
+                long millis = _sleepGranularity.getValue();
+                try {
+                    Thread.sleep(millis);
+                } catch (InterruptedException ie) {
+                    log.info("Thread.sleep(" + millis + ") interrupted.");
+                }
 
                 long woke = _timer.getElapsedMicros();
                 if (start > 0L) {

core/src/main/java/com/threerings/util/unsafe/Darwin

@@ -1 +0,0 @@
-Mac OS X

core/src/main/java/com/threerings/util/unsafe/FreeBSD/Makefile

@@ -1,45 +0,0 @@
-#
-# $Id: Makefile 3332 2005-02-03 01:30:33Z mdb $
-
-#
-# Executable definitions
-
-CC=gcc
-RM=rm
-CP=cp
-MKDIR=mkdir
-
-#
-# Directory definitions
-
-ROOT=../../../../../../../..
-LIBRARIES_PATH=
-OSINCDIR!=uname -s | tr 'A-Z' 'a-z'
-INSTALL_PATH=${ROOT}/dist/lib/i386-FreeBSD
-
-#
-# Parameter and file definitions
-
-INCLUDES=-I.. -I${JAVA_HOME}/include -I${JAVA_HOME}/include/${OSINCDIR}
-LIBRARIES=
-TARGET=libunsafe.so
-
-#
-# Target definitions
-
-all: ${TARGET}
-
-install:
-	@${MKDIR} -p ${INSTALL_PATH}
-	cp ${TARGET} ${INSTALL_PATH}
-
-${TARGET}: com_threerings_util_unsafe_Unsafe.c
-	@echo "Compiling Unsafe.c"
-	@${CC} ${INCLUDES} -c com_threerings_util_unsafe_Unsafe.c \
-	    -o com_threerings_util_unsafe_Unsafe.o
-	@echo "Creating libunsafe.so"
-	@${CC} -o ${TARGET} com_threerings_util_unsafe_Unsafe.o \
-	    ${LIBRARIES} ${LIBRARIES_PATH} -shared
-
-clean:
-	-${RM} -f *.o ${TARGET}

core/src/main/java/com/threerings/util/unsafe/FreeBSD/com_threerings_util_unsafe_Unsafe.c

@@ -1,117 +0,0 @@
-/*
- * $Id: com_threerings_util_unsafe_Unsafe.c 3653 2005-07-21 19:10:08Z mdb $
- */
-
-#include <stdio.h>
-#include <jni.h>
-#include <jvmpi.h>
-
-#include <errno.h>
-#include <sys/types.h>
-#include <time.h>
-#include <unistd.h>
-
-#include "com_threerings_util_unsafe_Unsafe.h"
-
-/* global jvmpi interface pointer */
-static JVMPI_Interface* jvmpi;
-
-/** A sleep method that uses select(). This seems to have about 10ms
- * granularity where nanosleep() has about 20ms. Sigh. */
-static int select_sleep (int millisecs)
-{
-    fd_set dummy;
-    struct timeval toWait;
-    FD_ZERO(&dummy);
-    toWait.tv_sec = millisecs / 1000;
-    toWait.tv_usec = (millisecs % 1000) * 1000;
-    return select(0, &dummy, NULL, NULL, &toWait);
-}
-
-JNIEXPORT void JNICALL
-Java_com_threerings_util_unsafe_Unsafe_enableGC (JNIEnv* env, jclass clazz)
-{
-    jvmpi->EnableGC();
-}
-
-JNIEXPORT void JNICALL
-Java_com_threerings_util_unsafe_Unsafe_disableGC (JNIEnv* env, jclass clazz)
-{
-    jvmpi->DisableGC();
-}
-
-JNIEXPORT void JNICALL
-Java_com_threerings_util_unsafe_Unsafe_nativeSleep (
-    JNIEnv* env, jclass clazz, jint millis)
-{
-/*     struct timespec tmspec; */
-/*     tmspec.tv_sec = millis/1000; */
-/*     tmspec.tv_nsec = (millis%1000)*1000000; */
-/*     if (nanosleep(&tmspec, NULL) < 0) { */
-/*         fprintf(stderr, "nanosleep() failed: %s\n", strerror(errno)); */
-/*     } */
-    if (select_sleep(millis) < 0) {
-        fprintf(stderr, "select_sleep() failed: %s\n", strerror(errno));
-    }
-}
-
-JNIEXPORT jboolean JNICALL
-Java_com_threerings_util_unsafe_Unsafe_nativeSetuid (
-    JNIEnv* env, jclass clazz, jint uid)
-{
-    if (setuid((uid_t)uid) != 0) {
-        fprintf(stderr, "setuid(%d) failed: %s\n", uid, strerror(errno));
-        return JNI_FALSE;
-    }
-    return JNI_TRUE;
-}
-
-JNIEXPORT jboolean JNICALL
-Java_com_threerings_util_unsafe_Unsafe_nativeSetgid (
-    JNIEnv* env, jclass clazz, jint gid)
-{
-    if (setgid((gid_t)gid) != 0) {
-        fprintf(stderr, "setgid(%d) failed: %s\n", gid, strerror(errno));
-        return JNI_FALSE;
-    }
-    return JNI_TRUE;
-}
-
-JNIEXPORT jboolean JNICALL Java_com_threerings_util_unsafe_Unsafe_nativeSeteuid (
-    JNIEnv* env, jclass clzz, jint uid)
-{
-    if (seteuid((uid_t)uid) != 0) {
-        fprintf(stderr, "seteuid(%d) failed: %s\n", uid, strerror(errno));
-        return JNI_FALSE;
-    }
-    return JNI_TRUE;
-}
-
-JNIEXPORT jboolean JNICALL Java_com_threerings_util_unsafe_Unsafe_nativeSetegid (
-    JNIEnv* env, jclass clazz, jint gid)
-{
-    if (setegid((gid_t)gid) != 0) {
-        fprintf(stderr, "setegid(%d) failed: %s\n", gid, strerror(errno));
-        return JNI_FALSE;
-    }
-    return JNI_TRUE;
-}
-
-JNIEXPORT jboolean JNICALL
-Java_com_threerings_util_unsafe_Unsafe_init (JNIEnv* env, jclass clazz)
-{
-    JavaVM* jvm;
-
-    if ((*env)->GetJavaVM(env, &jvm) > 0) {
-        fprintf(stderr, "Failed to get JavaVM from env.\n");
-        return JNI_FALSE;
-    }
-
-    /* get jvmpi interface pointer */
-    if (((*jvm)->GetEnv(jvm, (void**)&jvmpi, JVMPI_VERSION_1)) < 0) {
-        fprintf(stderr, "Failed to get JVMPI from JavaVM.\n");
-        return JNI_FALSE;
-    }
-
-    return JNI_TRUE;
-}

core/src/main/java/com/threerings/util/unsafe/Linux/Makefile

@@ -1,44 +0,0 @@
-#
-# $Id: Makefile 3331 2005-02-03 01:25:21Z mdb $
-
-#
-# Executable definitions
-
-CC=gcc
-RM=rm
-CP=cp
-MKDIR=mkdir
-
-#
-# Directory definitions
-
-ROOT=../../../../../../../..
-LIBRARIES_PATH=-L/usr/X11R6/lib
-INSTALL_PATH=${ROOT}/dist/lib/i686-Linux
-
-#
-# Parameter and file definitions
-
-INCLUDES=-I.. -I${JAVA_HOME}/include -I${JAVA_HOME}/include/linux
-LIBRARIES=-lX11
-TARGET=libunsafe.so
-
-#
-# Target definitions
-
-all: ${TARGET}
-
-install:
-	@${MKDIR} -p ${INSTALL_PATH}
-	cp ${TARGET} ${INSTALL_PATH}
-
-${TARGET}: com_threerings_util_unsafe_Unsafe.c
-	@echo Compiling Unsafe.c
-	@${CC} ${INCLUDES} -c com_threerings_util_unsafe_Unsafe.c \
-	    -o com_threerings_util_unsafe_Unsafe.o
-	@echo Creating ${TARGET}
-	@${CC} -o ${TARGET} com_threerings_util_unsafe_Unsafe.o \
-	    ${LIBRARIES} ${LIBRARIES_PATH} -shared
-
-clean:
-	-${RM} -f *.o ${TARGET}

core/src/main/java/com/threerings/util/unsafe/Linux/com_threerings_util_unsafe_Unsafe.c

@@ -1 +0,0 @@
-../FreeBSD/com_threerings_util_unsafe_Unsafe.c

core/src/main/java/com/threerings/util/unsafe/Mac OS X/Makefile

@@ -1,45 +0,0 @@
-#
-# $Id: Makefile 3332 2005-02-03 01:30:33Z mdb $
-
-#
-# Executable definitions
-
-CC=gcc
-RM=rm
-CP=cp
-MKDIR=mkdir
-
-#
-# Directory definitions
-
-ROOT=../../../../../../../..
-LIBRARIES_PATH=
-OSINCDIR!=uname -s | tr 'A-Z' 'a-z'
-INSTALL_PATH=${ROOT}/dist/lib/`uname -m`-Darwin
-
-#
-# Parameter and file definitions
-
-INCLUDES=-I.. -I/System/Library/Frameworks/JavaVM.framework/Headers
-LIBRARIES=
-TARGET=libunsafe.jnilib
-
-#
-# Target definitions
-
-all: ${TARGET}
-
-install:
-	@${MKDIR} -p ${INSTALL_PATH}
-	cp ${TARGET} ${INSTALL_PATH}
-
-${TARGET}: com_threerings_util_unsafe_Unsafe.c
-	@echo "Compiling $<"
-	@${CC} ${INCLUDES} -c com_threerings_util_unsafe_Unsafe.c \
-	    -o com_threerings_util_unsafe_Unsafe.o
-	@echo "Creating $@"
-	@${CC} -o ${TARGET} com_threerings_util_unsafe_Unsafe.o \
-	    ${LIBRARIES} ${LIBRARIES_PATH} -dynamiclib
-
-clean:
-	-${RM} -f *.o ${TARGET}

core/src/main/java/com/threerings/util/unsafe/Mac OS X/com_threerings_util_unsafe_Unsafe.c

@@ -1 +0,0 @@
-../FreeBSD/com_threerings_util_unsafe_Unsafe.c

core/src/main/java/com/threerings/util/unsafe/Unsafe.java

@@ -1,209 +0,0 @@
-//
-// Nenya library - tools for developing networked games
-// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
-// https://github.com/threerings/nenya
-//
-// This library is free software; you can redistribute it and/or modify it
-// under the terms of the GNU Lesser General Public License as published
-// by the Free Software Foundation; either version 2.1 of the License, or
-// (at your option) any later version.
-//
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-// Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public
-// License along with this library; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
-package com.threerings.util.unsafe;
-
-import com.samskivert.util.RunAnywhere;
-
-import static com.threerings.NenyaLog.log;
-
-/**
- * A native library for doing unsafe things. Don't use this library. If
- * you must ignore that warning, then be sure you use it sparingly and
- * only in very well considered cases.
- */
-public class Unsafe
-{
-    /**
-     * Enables or disables garbage collection. <em>Warning:</em> you will
-     * be fucked if you leave it disabled for too long. Do not do this
-     * unless you are dang sure about what you're doing and are prepared
-     * to test your code on every platform this side of Nantucket.
-     *
-     * <p> Calls to this method do not nest. Regardless of how many times
-     * you disable GC, only one call is required to reenable it.
-     */
-    public static void setGCEnabled (boolean enabled)
-    {
-        // we don't support nesting, NOOP if the state doesn't change
-        if (isLoaded()) {
-            if (!_initialized && !(_initialized = init())) {
-                // no joy initializing things
-                return;
-            }
-
-            if (_initialized && enabled != _gcEnabled) {
-                _gcEnabled = enabled;
-                if (_gcEnabled) {
-                    enableGC();
-                } else {
-                    disableGC();
-                }
-            }
-        }
-    }
-
-    /**
-     * Causes the current thread to block for the specified number of
-     * milliseconds. This exists primarily to work around the fact that on
-     * Linux, {@link Thread#sleep(long)} is only accurate to around 12ms which
-     * is wholly unacceptable.
-     */
-    public static void sleep (int millis)
-    {
-        if (RunAnywhere.isLinux() && isLoaded()) {
-            nativeSleep(millis);
-        } else {
-            try {
-                Thread.sleep(millis);
-            } catch (InterruptedException ie) {
-                log.info("Thread.sleep(" + millis + ") interrupted.");
-            }
-        }
-    }
-
-    /**
-     * Sets the process' uid to the specified value.
-     *
-     * @return true if the uid was changed, false if we were unable to do so.
-     */
-    public static boolean setuid (int uid)
-    {
-        if (!RunAnywhere.isWindows() && isLoaded()) {
-            return nativeSetuid(uid);
-        }
-        return false;
-    }
-
-    /**
-     * Sets the process' gid to the specified value.
-     *
-     * @return true if the gid was changed, false if we were unable to do so.
-     */
-    public static boolean setgid (int gid)
-    {
-        if (!RunAnywhere.isWindows() && isLoaded()) {
-            return nativeSetgid(gid);
-        }
-        return false;
-    }
-
-    /**
-     * Sets the process' effective uid to the specified value.
-     *
-     * @return true if the euid was changed, false if we were unable to do so.
-     */
-    public static boolean seteuid (int uid)
-    {
-        if (!RunAnywhere.isWindows() && isLoaded()) {
-            return nativeSeteuid(uid);
-        }
-        return false;
-    }
-
-    /**
-     * Sets the process' effective gid to the specified value.
-     *
-     * @return true if the egid was changed, false if we were unable to do so.
-     */
-    public static boolean setegid (int gid)
-    {
-        if (!RunAnywhere.isWindows() && isLoaded()) {
-            return nativeSetegid(gid);
-        }
-        return false;
-    }
-
-    /**
-     * Returns true if the native library was successfully loaded, and if this is the first time
-     * it's been checked and it failed, reports the failure.
-     */
-    protected static boolean isLoaded ()
-    {
-        if (_loadError != null) {
-            log.warning("Unable to load 'unsafe' library", "e", _loadError);
-            _loadError = null;
-        }
-        return _loaded;
-    }
-
-    /**
-     * Reenable garbage collection after a call to {@link #disableGC}.
-     */
-    protected static native void enableGC ();
-
-    /**
-     * Disables garbage collection.
-     */
-    protected static native void disableGC ();
-
-    /**
-     * Sleeps the current thread for the specified number of milliseconds.
-     */
-    protected static native void nativeSleep (int millis);
-
-    /**
-     * Calls through to the native OS system call to change our uid.
-     */
-    protected static native boolean nativeSetuid (int uid);
-
-    /**
-     * Calls through to the native OS system call to change our gid.
-     */
-    protected static native boolean nativeSetgid (int gid);
-
-    /**
-     * Calls through to the native OS system call to change our euid.
-     */
-    protected static native boolean nativeSeteuid (int uid);
-
-    /**
-     * Calls through to the native OS system call to change our egid.
-     */
-    protected static native boolean nativeSetegid (int gid);
-
-    /**
-     * Called to initialize our library.
-     */
-    protected static native boolean init ();
-
-    /** The current state of GC enablement. */
-    protected static boolean _gcEnabled = true;
-
-    /** Whether or not we were able to load our library. */
-    protected static boolean _loaded;
-
-    /** Whether or not we were able to initialize our library (i.e. get access to jvmpi) */
-    protected static boolean _initialized;
-
-    /**
-     * The error that occurred when loading the native library, or null if none occurred or it was
-     * already reported.
-     */
-    protected static Throwable _loadError;
-
-    static {
-        try {
-            System.loadLibrary("unsafe");
-            _loaded = true;
-        } catch (Throwable t) {
-            _loadError = t;
-        }
-    }
-}

core/src/main/java/com/threerings/util/unsafe/Windows/Makefile

@@ -1,49 +0,0 @@
-#
-# $Id: Makefile 3331 2005-02-03 01:25:21Z mdb $
-
-NAME=unsafe
-
-#
-# Executable definitions
-
-CC=i586-mingw32msvc-gcc
-RM=rm
-CP=cp
-MKDIR=mkdir
-DLLWRAP=i586-mingw32msvc-dllwrap
-#
-# Directory definitions
-
-ROOT=../../../../../../../..
-INSTALL_PATH=${ROOT}/dist/lib/i686-Windows
-
-#
-# Source files
-
-SRCS = com_threerings_util_unsafe_Unsafe.c
-OBJS = ${SRCS:.c=.o}
-
-#
-# Parameter and file definitions
-
-INCLUDES=
-CFLAGS=-I.. -I${JAVA_HOME}/include -I${JAVA_HOME}/include/linux
-
-LDFLAGS=-L/usr/X11R6/lib
-LIBS=
-TARGET=${NAME}.dll
-INSTALL_TARGET=${INSTALL_PATH}/${TARGET}
-
-#
-# Target definitions
-
-all: ${INSTALL_TARGET}
-
-${INSTALL_TARGET}: ${OBJS}
-	@${MKDIR} -p ${INSTALL_PATH}
-	${DLLWRAP} --output-def ${NAME}.def --add-stdcall-alias \
-		-o ${INSTALL_TARGET} -s ${OBJS}
-
-clean:
-	-${RM} ${OBJS}
-	-${RM} ${INSTALL_TARGET}

core/src/main/java/com/threerings/util/unsafe/Windows/com_threerings_util_unsafe_Unsafe.c

@@ -1,80 +0,0 @@
-/*
- * $Id: com_threerings_util_unsafe_Unsafe.c 3331 2005-02-03 01:25:21Z mdb $
- */
-
-#include <stdio.h>
-#include <jni.h>
-#include <jvmpi.h>
-
-#include "com_threerings_util_unsafe_Unsafe.h"
-
-/* global jvmpi interface pointer */
-static JVMPI_Interface* jvmpi;
-
-JNIEXPORT void JNICALL
-Java_com_threerings_util_unsafe_Unsafe_enableGC (JNIEnv* env, jclass clazz)
-{
-    fprintf(stderr, "Reenabling GC.\n");
-    jvmpi->EnableGC();
-}
-
-JNIEXPORT void JNICALL
-Java_com_threerings_util_unsafe_Unsafe_disableGC (JNIEnv* env, jclass clazz)
-{
-    fprintf(stderr, "Disabling GC.\n");
-    jvmpi->DisableGC();
-}
-
-JNIEXPORT void JNICALL
-Java_com_threerings_util_unsafe_Unsafe_nativeSleep (
-    JNIEnv* env, jclass clazz, jint millis)
-{
-    /* not supported */
-}
-
-JNIEXPORT jboolean JNICALL Java_com_threerings_util_unsafe_Unsafe_nativeSetuid
-    (JNIEnv *, jclass, jint)
-{
-    /* not supported */
-    return JNI_FALSE;
-}
-
-JNIEXPORT jboolean JNICALL Java_com_threerings_util_unsafe_Unsafe_nativeSetgid
-    (JNIEnv *, jclass, jint)
-{
-    /* not supported */
-    return JNI_FALSE;
-}
-
-JNIEXPORT jboolean JNICALL Java_com_threerings_util_unsafe_Unsafe_nativeSeteuid (
-    JNIEnv* env, jclass clzz, jint uid)
-{
-    /* not supported */
-    return JNI_FALSE;
-}
-
-JNIEXPORT jboolean JNICALL Java_com_threerings_util_unsafe_Unsafe_nativeSetegid (
-    JNIEnv* env, jclass clazz, jint gid)
-{
-    /* not supported */
-    return JNI_FALSE;
-}
-
-JNIEXPORT jboolean JNICALL
-Java_com_threerings_util_unsafe_Unsafe_init (JNIEnv* env, jclass clazz)
-{
-    JavaVM* jvm;
-
-    if ((*env)->GetJavaVM(env, &jvm) > 0) {
-        fprintf(stderr, "Failed to get JavaVM from env.\n");
-        return JNI_FALSE;
-    }
-
-    /* get jvmpi interface pointer */
-    if (((*jvm)->GetEnv(jvm, (void**)&jvmpi, JVMPI_VERSION_1)) < 0) {
-        fprintf(stderr, "Failed to get JVMPI from JavaVM.\n");
-        return JNI_FALSE;
-    }
-
-    return JNI_TRUE;
-}

core/src/main/java/com/threerings/util/unsafe/com_threerings_util_unsafe_Unsafe.h

@@ -1,77 +0,0 @@
-/* DO NOT EDIT THIS FILE - it is machine generated */
-#include <jni.h>
-/* Header for class com_threerings_util_unsafe_Unsafe */
-
-#ifndef _Included_com_threerings_util_unsafe_Unsafe
-#define _Included_com_threerings_util_unsafe_Unsafe
-#ifdef __cplusplus
-extern "C" {
-#endif
-/*
- * Class:     com_threerings_util_unsafe_Unsafe
- * Method:    enableGC
- * Signature: ()V
- */
-JNIEXPORT void JNICALL Java_com_threerings_util_unsafe_Unsafe_enableGC
-  (JNIEnv *, jclass);
-
-/*
- * Class:     com_threerings_util_unsafe_Unsafe
- * Method:    disableGC
- * Signature: ()V
- */
-JNIEXPORT void JNICALL Java_com_threerings_util_unsafe_Unsafe_disableGC
-  (JNIEnv *, jclass);
-
-/*
- * Class:     com_threerings_util_unsafe_Unsafe
- * Method:    nativeSleep
- * Signature: (I)V
- */
-JNIEXPORT void JNICALL Java_com_threerings_util_unsafe_Unsafe_nativeSleep
-  (JNIEnv *, jclass, jint);
-
-/*
- * Class:     com_threerings_util_unsafe_Unsafe
- * Method:    nativeSetuid
- * Signature: (I)Z
- */
-JNIEXPORT jboolean JNICALL Java_com_threerings_util_unsafe_Unsafe_nativeSetuid
-  (JNIEnv *, jclass, jint);
-
-/*
- * Class:     com_threerings_util_unsafe_Unsafe
- * Method:    nativeSetgid
- * Signature: (I)Z
- */
-JNIEXPORT jboolean JNICALL Java_com_threerings_util_unsafe_Unsafe_nativeSetgid
-  (JNIEnv *, jclass, jint);
-
-/*
- * Class:     com_threerings_util_unsafe_Unsafe
- * Method:    nativeSeteuid
- * Signature: (I)Z
- */
-JNIEXPORT jboolean JNICALL Java_com_threerings_util_unsafe_Unsafe_nativeSeteuid
-  (JNIEnv *, jclass, jint);
-
-/*
- * Class:     com_threerings_util_unsafe_Unsafe
- * Method:    nativeSetegid
- * Signature: (I)Z
- */
-JNIEXPORT jboolean JNICALL Java_com_threerings_util_unsafe_Unsafe_nativeSetegid
-  (JNIEnv *, jclass, jint);
-
-/*
- * Class:     com_threerings_util_unsafe_Unsafe
- * Method:    init
- * Signature: ()Z
- */
-JNIEXPORT jboolean JNICALL Java_com_threerings_util_unsafe_Unsafe_init
-  (JNIEnv *, jclass);
-
-#ifdef __cplusplus
-}
-#endif
-#endif

core/src/test/java/com/threerings/util/UIDTestApp.java

@@ -1,46 +0,0 @@
-//
-// Nenya library - tools for developing networked games
-// Copyright (C) 2002-2012 Three Rings Design, Inc., All Rights Reserved
-// https://github.com/threerings/nenya
-//
-// This library is free software; you can redistribute it and/or modify it
-// under the terms of the GNU Lesser General Public License as published
-// by the Free Software Foundation; either version 2.1 of the License, or
-// (at your option) any later version.
-//
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-// Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public
-// License along with this library; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
-package com.threerings.util;
-
-import com.threerings.util.unsafe.Unsafe;
-
-/**
- * Does something extraordinary.
- */
-public class UIDTestApp
-{
-    public static void main (String[] args)
-    {
-        if (Unsafe.setuid(1000)) {
-            System.err.println("Yay! My uid is changed.");
-        } else {
-            System.err.println("Boo hoo! I couldn't change my uid.");
-        }
-        if (Unsafe.setgid(60)) {
-            System.err.println("Yay! My gid is changed.");
-        } else {
-            System.err.println("Boo hoo! I couldn't change my gid.");
-        }
-        try {
-            Thread.sleep(60*1000L);
-        } catch (Exception e) {
-        }
-    }
-}