FULL PRODUCT VERSION :
java version "1.6.0-ea"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-ea-b32)
Java HotSpot(TM) Client VM (build 1.6.0-ea-b32, mixed mode, sharing)


ADDITIONAL OS VERSION INFORMATION :
Linux 2.6.7 #1 Tue Jul 20 20:47:06 EDT 2004 i686 GNU/Linux
(irrelevant)

EXTRA RELEVANT SYSTEM CONFIGURATION :
Debian distribution, version "Sid" (irrelevant)

A DESCRIPTION OF THE PROBLEM :
The resolution of symlinks in the script $JAVA_HOME/bin/ControlPanel fails if one of the intermediate directories along the path to the java executable is a symlink. For example:

/usr/local/bin/java -> ../stow/java/bin/java
/usr/local/stow/java/bin -> ../jdk.1.6.0/bin

The symlink resolution code following the comment "# Resolve symlinks. See 4152645." in ControlPanel first resolves /usr/local/bin/java to /usr/local/bin/../stow/java/bin/java, but fails to resolve this path to its true canonical location, which is /usr/local/stow/jdk1.6.0/bin/java.

This can be fixed by replacing the entire while loop of the symlink resolution code with the single line

PRG=`readlink -f "$PRG"`

(Incidentally, the calls to "expr foo : bar" inside the link resolution loop produces error messages comlaining about the RE bar starting with a caret. Replacing the while loop with a call to readlink takes care of those error messages as well.)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
0) assume JDK is installed in $JAVA_HOME and that $JAVA_HOME is not /tmp
1) cd /tmp
2) rm -fr jre
3) ln -s "$JAVA_HOME/bin" myjavabin
4) ./myjavabin/ControlPanel
5) rm myjavabin

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
ControlPanel starts.
ACTUAL -
ControlPanel does not start.

Instead, it aborts with an error message "... cd: ./myjavabin/../jre: No such file or directory"


ERROR MESSAGES/STACK TRACES THAT OCCUR :
[...] cd: ./myjavabin/../jre: No such file or directory


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
see "Step to reproduce"
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
In the ControlPanel script, Insert the line

PRG=`readlink -f "${PRG}"`

before the following while loop:

while [ "${linktest}" "${PRG}" ]; do

(In fact, the while loop can then be removed.)
###@###.### 2005-04-21 23:47:41 GMT