1 files changed, 139 insertions, 0 deletions
diff --git a/pki/base/osutil/src/com/netscape/osutil/ResourceLimit.java b/pki/base/osutil/src/com/netscape/osutil/ResourceLimit.java
new file mode 100644
index 000000000..23a99836b
--- /dev/null
+++ b/pki/base/osutil/src/com/netscape/osutil/ResourceLimit.java
@@ -0,0 +1,139 @@
+// --- 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.*;
+
+
+/**
+ * This class is to enabled reading/setting of various resource limits
+ * on unix
+ */
+public class ResourceLimit {
+
+    /**
+     * Return the current process id of the Java VM
+     */
+
+    /**
+     * See /usr/include/sys/resource.h
+     */
+    public static int RLIMIT_CPU = 0;
+    public static int RLIMIT_FSIZE = 1;
+    public static int RLIMIT_DATA = 2;
+    public static int RLIMIT_STACK = 3;
+    public static int RLIMIT_CORE = 4;
+    public static int RLIMIT_NOFILE = 5;
+    public static int RLIMIT_VMEM = 6;
+
+    /**
+     * Return the hard limit of the specified resource 
+     */
+    public static native int getHardLimit(int resource);
+
+    /**
+     * Return the soft limit of the specified resource 
+     */
+    public static native int getSoftLimit(int resource);
+
+    /**
+     * Set limits on the resource
+     */
+    public static native int setLimits(int resource, int soft, int hard);
+
+    static {
+        boolean mNativeLibrariesLoaded = false;
+        if (File.separatorChar == '/') {
+            String os = System.getProperty( "os.name" );
+            if( ( os.equals( "Linux" ) ) ) {
+                // Check for 64-bit library availability
+                // prior to 32-bit library availability.
+                mNativeLibrariesLoaded =
+                    OSUtil.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 =
+                        OSUtil.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();
+                }
+            }
+        }
+    }
+
+    /* little test program here... */
+
+    public static void main(String args[]) {
+        try {
+            testFDlimit("64");
+            printFDLimit();
+            System.gc();
+            System.out.println("Changing softlimit to be equal to hardlimit()");
+
+            setLimits(RLIMIT_NOFILE, 
+                getHardLimit(RLIMIT_NOFILE),
+                getHardLimit(RLIMIT_NOFILE)
+            );
+
+            testFDlimit("1024");
+            printFDLimit();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+    }
+
+    private static void printFDLimit() {
+        System.out.println("Max filedescs (hardlimit) " + getHardLimit(RLIMIT_NOFILE));
+        System.out.println("Max filedescs (softlimit) " + getSoftLimit(RLIMIT_NOFILE));
+    }
+
+    /* this creates as many files as it can. The files will be closed when this
+     function exits, as they will be garbage collected. */
+
+    private static void testFDlimit(String a) {
+        int count = 0;
+        FileOutputStream f[] = new FileOutputStream[1024];
+
+        try {
+            for (count = 0; count < 1024; count++) {
+                f[count] = new FileOutputStream("test_" + a + "_" + count);
+            }
+        } catch (Exception e) {
+        }
+    }
+
+}
+