add dir_stat.disk_usage

bindings/java/src/jni/generate.pl

@@ -586,6 +586,9 @@ my %classes = (
       {
          name => 'sockets', type => 'Long',
       },
+      {
+         name => 'disk_usage', type => 'Long',
+      },
     ],
     NetInfo => [
       {

bindings/java/src/net/hyperic/sigar/cmd/Watch.java

@@ -51,6 +51,7 @@ public class Watch {
             System.out.println("   Blkdevs....." + stats.getBlkdevs()); 
             System.out.println("   Sockets....." + stats.getSockets()); 
             System.out.println("   Total......." + stats.getTotal());
+            System.out.println("   Disk Usage.." + stats.getDiskUsage());
         }
     }
 

include/sigar_fileinfo.h

@@ -110,6 +110,7 @@ typedef struct {
     sigar_uint64_t chrdevs;
     sigar_uint64_t blkdevs;
     sigar_uint64_t sockets;
+    sigar_uint64_t disk_usage;
 } sigar_dir_stat_t;
 
 SIGAR_DECLARE(const char *)

src/sigar_fileinfo.c

@@ -634,6 +634,8 @@ int sigar_dir_stat_get(sigar_t *sigar,
             continue;
         }
 
+        dirstats->disk_usage += info.st_size;
+
         switch (filetype_from_mode(info.st_mode)) {
           case SIGAR_FILETYPE_REG:
             ++dirstats->files;