Merge pull request #62 from xiongchen2012/master

执行脚本的用户名超过8个字符时无法执行脚本

Author: oldratlee

show-busy-java-threads

@@ -237,7 +237,7 @@ for ((i = 0; update_count <= 0 || i < update_count; ++i)); do
     [ -n "$append_file" ] && headInfo >> "$append_file"
     [ "$update_count" -ne 1 ] && headInfo
 
-    ps -Leo pid,lwp,user,comm,pcpu --no-headers | {
+    ps -Leo pid,lwp -o ruser=${USER} -o comm,pcpu --no-headers | {
         [ -z "${pid}" ] &&
         awk '$4=="java"{print $0}' ||
         awk -v "pid=${pid}" '$1==pid,$4=="java"{print $0}'