diff options
Diffstat (limited to 'pki/base/osutil/src/com/netscape/osutil/OSUtil.java')
-rw-r--r-- | pki/base/osutil/src/com/netscape/osutil/OSUtil.java | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/pki/base/osutil/src/com/netscape/osutil/OSUtil.java b/pki/base/osutil/src/com/netscape/osutil/OSUtil.java new file mode 100644 index 000000000..905197435 --- /dev/null +++ b/pki/base/osutil/src/com/netscape/osutil/OSUtil.java @@ -0,0 +1,115 @@ +// --- 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 ); +} + |