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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.osutil;
import java.io.*;
import java.util.*;
public final class OSUtil {
/**
* Causes this process to die. Works more reliably than System.exit().
*/
public static native void nativeExit( int status );
public static native String BtoA( byte data[] );
public static native byte[] AtoB( String data );
static boolean tryLoad( String filename )
{
try {
System.load( filename );
} catch( Exception e ) {
return false;
} catch( UnsatisfiedLinkError e ) {
return false;
}
return true;
}
// Load native library
static {
boolean mNativeLibrariesLoaded = false;
String os = System.getProperty( "os.name" );
if( ( os.equals( "Linux" ) ) ) {
// Check for 64-bit library availability
// prior to 32-bit library availability.
mNativeLibrariesLoaded =
tryLoad( "/usr/lib64/osutil/libosutil.so" );
if( mNativeLibrariesLoaded ) {
System.out.println( "64-bit osutil library loaded" );
} else {
// REMINDER: May be trying to run a 32-bit app
// on 64-bit platform.
mNativeLibrariesLoaded =
tryLoad( "/usr/lib/osutil/libosutil.so" );
if( mNativeLibrariesLoaded ) {
System.out.println( "32-bit osutil library loaded");
} else {
System.out.println( "FAILED loading osutil library!");
System.exit( -1 );
}
}
} else {
try {
System.loadLibrary( "osutil" );
System.out.println( "osutil library loaded" );
mNativeLibrariesLoaded = true;
} catch( Throwable t ) {
// This is bad news, the program is doomed at this point
t.printStackTrace();
}
}
}
public static native int getNTpid();
/**
* A routine to get the value of an system or environment variable.
* @param envName A string of the form <code> env_var=value </code>
* @return String value of the environemnt variable.
*/
public static native String getenv( String envName );
/**
* A routine to set an environment variable.
* @param envName A string of the form <code> env_var=value </code>
* @return Return 0 on success, non-zero on failure
*/
public static native int putenv( String envValue );
/**
* A routine to get a file system read lock.
* @param filename A file with relative or absolute path
* @return Return 0 on getting a unique read lock,
* Return 1 on getting non-unique read lock, -1 on failure
*/
public static native int getFileReadLock( String filename );
/**
* A routine to get a file system write lock.
* @param filename A file with relative or absolute path
* @return Return 0 on successfully getting a write lock,
* return 1 if the file is read locked,
* return 2 if the file is write locked, -1 on failure
*/
public static native int getFileWriteLock( String filename );
}
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