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From "Andrew McIntyre (JIRA)" <derby-...@db.apache.org>
Subject [jira] Created: (DERBY-1487) Use of getCanonicalPath() in sysinfo causes a SecurityException
Date Sat, 08 Jul 2006 06:44:29 GMT
Use of getCanonicalPath() in sysinfo causes a SecurityException

         Key: DERBY-1487
         URL: http://issues.apache.org/jira/browse/DERBY-1487
     Project: Derby
        Type: Bug

  Components: Tools  
 Environment: Windows XP. I could not reproduce the issue on Mac OS X.
    Reporter: Andrew McIntyre
    Priority: Minor

>From DERBY-1272:

Here's the full stack for the SecurityException found by the errorStream test with the -v4
patch applied: 

Test errorStream failed: access denied (java.io.FilePermission C:\derby-trunk\classes read)

        at java.security.AccessController.checkPermission(AccessController.java:401) 
        at java.lang.SecurityManager.checkPermission(SecurityManager.java:524) 
        at java.lang.SecurityManager.checkRead(SecurityManager.java:863) 
        at java.io.File.exists(File.java:678) 
        at java.io.Win32FileSystem.canonicalize(Win32FileSystem.java:360) 
        at java.io.File.getCanonicalPath(File.java:513) 
        at org.apache.derby.impl.tools.sysinfo.Main.formatURL(Main.java:1206) 
        at org.apache.derby.impl.tools.sysinfo.Main.loadZipFromResource(Main.java:831) 
        at org.apache.derby.impl.tools.sysinfo.Main.getAllInfo(Main.java:735) 
        at org.apache.derby.impl.tools.sysinfo.Main.reportDerby(Main.java:212) 
        at org.apache.derby.impl.tools.sysinfo.Main.getMainInfo(Main.java:119) 
        at org.apache.derby.tools.sysinfo.getInfo(sysinfo.java:200) 
        at org.apache.derby.impl.services.monitor.BaseMonitor.dumpTempWriter(BaseMonitor.java:1949)

        at org.apache.derby.impl.services.monitor.BaseMonitor.runWithState(BaseMonitor.java:383)

        at org.apache.derby.impl.services.monitor.FileMonitor.<init>(FileMonitor.java:59)

        at org.apache.derby.iapi.services.monitor.Monitor.startMonitor(Monitor.java:288) 
        at org.apache.derby.iapi.jdbc.JDBCBoot.boot(JDBCBoot.java:68) 
        at org.apache.derby.jdbc.EmbeddedDriver.boot(EmbeddedDriver.java:178) 

The problem would appear that we explicitly need java.io.FilePermission read on the classes
directory, even though this directory contains the classes we are currently running against.
This may be a problem with java.io.File.getCanonicalPath(), but it may also be a problem with

org.apache.derby.impl.tools.sysinfo.Main.formatURL(Main.java:1206) is:

result = new File(filename).getCanonicalPath().replace('/', File.separatorChar);

The Sun Windows JVM may throw a SecurityException by default in the most restricted environments.
From the javadoc for File.getCanonicalPath():

"If a required system property value cannot be accessed, or if a security manager exists and
its SecurityManager.checkRead(java.io.FileDescriptor) method denies read access to the file"

Some investigation is required to determine whether or not this is a Windows-specific issue
or if it is reproducible on other platforms. It has already been found to not be reproducible
on Mac OS X. I'm curious why this exception is not thrown when running sysinfo standalone
with a security manager without a policy file, since presumably this permission would not
have been granted to sysinfo and the same code path should be used in both cases.

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