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  1. JDK
  2. JDK-7167744

Impossible to escape metacharacters on command line e.g. "*"

    Details

    • Subcomponent:
    • Introduced In Build:
      b130
    • Introduced In Version:
      7
    • CPU:
      generic, x86
    • OS:
      windows, windows_7

      Description

      FULL PRODUCT VERSION :
      C:\temp>java -version
      java version "1.7.0-ea"
      Java(TM) SE Runtime Environment (build 1.7.0-ea-b130)
      Java HotSpot(TM) 64-Bit Server VM (build 21.0-b02, mixed mode)


      FULL OS VERSION :
      Tested on Windows 7 64 bit
      also tested on Windows XP (32 bit)

      EXTRA RELEVANT SYSTEM CONFIGURATION :
      Nothing special. Plain vanilla. The systems have both JDK6 and JDK7 setup and easily switchable

      A DESCRIPTION OF THE PROBLEM :
      I can not escape the star (*) character to get it fed into a java program as is. It is ALWAYS expanded to a list of all the files in the current directory!

      See the trivial sample program, and the results of calling it with naked star versus double-quoted stars on JDK6 vs. JDK7

      C:\temp>cat echo.java

      public class echo {
          public static void main(String[] argv) throws Exception {
              for (String s : argv) {
                  System.out.print(s);
                  System.out.print(' ');
              }
              System.out.println();
          }
      }

      ++++++++++++++++++++++++++++++++
      C:\temp>java -version
      java version "1.7.0-ea"
      Java(TM) SE Runtime Environment (build 1.7.0-ea-b130)
      Java HotSpot(TM) 64-Bit Server VM (build 21.0-b02, mixed mode)

      C:\temp>java -cp . echo *
      echo.class echo.java

      C:\temp>java -cp . echo "*"
      echo.class echo.java

      *** I switched JDKs here ****

      C:\temp>java -version
      java version "1.6.0_27-ea"
      Java(TM) SE Runtime Environment (build 1.6.0_27-ea-b02)
      Java HotSpot(TM) Client VM (build 20.2-b02, mixed mode, sharing)

      C:\temp>java -cp . echo *
      echo.class echo.java

      C:\temp>java -cp . echo "*"
      *

      ++++++++++++++++++++++++++++++++


      THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Did not try

      THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Did not try

      REGRESSION. Last worked in version 6u31

      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      See description. It is trivial. Just have main print out its args. Then call main with "*" (literal double quotes). THen with a "naked" *.
      Try it on JDK7 and JDK6. On 7 the quoted star will be replaced with the list of files!

      I am running java from the plain Windows command interpreter (cmd.exe)


      EXPECTED VERSUS ACTUAL BEHAVIOR :
      See description.

      echo * --> produce list of files in the current directory
      echo "*" --> a plain star character should be passed to main()
      ERROR MESSAGES/STACK TRACES THAT OCCUR :
      No error messages.

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      Source code provided by Bill Shannon:

      public class echo {
          public static void main(String[] argv) throws Exception {
              for (String s : argv) {
                  System.out.print(s);
                  System.out.print(' ');
              }
              System.out.println();
          }
      }

      ---------- END SOURCE ----------

      CUSTOMER SUBMITTED WORKAROUND :
      I am an employee of Oracle and develop software for GlassFish. This is a big problem. We have monitoring commands that need to see a literal star character. It is impossible (or at least unknown to me) how to pass in a star character to a java program.

      What I will have to do is some sort of ghastly hack like force users to use a token (e.g. ___STAR___) to represent the star character.

      I ran this by Bill Shannon. He believes it should be a P1 bug.
      I created this bug from the public site -- I didn't have the bugster URL handy...

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              • Assignee:
                ksrini Kumar Srinivasan
                Reporter:
                webbuggrp Webbug Group
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