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From "Sebb (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COMPRESS-181) Tar files created by AIX native tar, and which contain symlinks, cannot be read by TarArchiveInputStream
Date Tue, 28 Feb 2012 13:07:48 GMT

    [ https://issues.apache.org/jira/browse/COMPRESS-181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13218133#comment-13218133
] 

Sebb commented on COMPRESS-181:
-------------------------------

I don't think the previous field has overflowed in this case - it's all ascii '0'.

Not sure that the GNU tar approach is sensible as the time value is then meaningless.
I think it would be better to skip the entire field.

But do we just skip the field (as if it were all null), or skip it only on "non-strict" mode,
or perhaps generate some kind of warning?
                
> Tar files created by AIX native tar, and which contain symlinks, cannot be read by TarArchiveInputStream
> --------------------------------------------------------------------------------------------------------
>
>                 Key: COMPRESS-181
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-181
>             Project: Commons Compress
>          Issue Type: Bug
>          Components: Archivers
>    Affects Versions: 1.2, 1.3, 1.4
>         Environment: AIX 5.3
>            Reporter: Robert Clark
>         Attachments: simple-aix-native-tar.tar
>
>
> A simple tar file created on AIX using the native ({{/usr/bin/tar}} tar utility) *and*
which contains a symbolic link, cannot be loaded by TarArchiveInputStream:
> {noformat}
> java.io.IOException: Error detected parsing the header
> 	at org.apache.commons.compress.archivers.tar.TarArchiveInputStream.getNextTarEntry(TarArchiveInputStream.java:201)
> 	at Extractor.extract(Extractor.java:13)
> 	at Extractor.main(Extractor.java:28)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.tools.ant.taskdefs.ExecuteJava.run(ExecuteJava.java:217)
> 	at org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:152)
> 	at org.apache.tools.ant.taskdefs.Java.run(Java.java:771)
> 	at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:221)
> 	at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:135)
> 	at org.apache.tools.ant.taskdefs.Java.execute(Java.java:108)
> 	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 	at java.lang.reflect.Method.invoke(Method.java:597)
> 	at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
> 	at org.apache.tools.ant.Task.perform(Task.java:348)
> 	at org.apache.tools.ant.Target.execute(Target.java:390)
> 	at org.apache.tools.ant.Target.performTasks(Target.java:411)
> 	at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
> 	at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
> 	at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
> 	at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
> 	at org.apache.tools.ant.Main.runBuild(Main.java:809)
> 	at org.apache.tools.ant.Main.startAnt(Main.java:217)
> 	at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
> 	at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
> Caused by: java.lang.IllegalArgumentException: Invalid byte 0 at offset 0 in '{NUL}1722000726
' len=12
> 	at org.apache.commons.compress.archivers.tar.TarUtils.parseOctal(TarUtils.java:99)
> 	at org.apache.commons.compress.archivers.tar.TarArchiveEntry.parseTarHeader(TarArchiveEntry.java:819)
> 	at org.apache.commons.compress.archivers.tar.TarArchiveEntry.<init>(TarArchiveEntry.java:314)
> 	at org.apache.commons.compress.archivers.tar.TarArchiveInputStream.getNextTarEntry(TarArchiveInputStream.java:199)
> 	... 29 more
> {noformat}
> Tested with 1.2 and the 1.4 nightly build from Feb 23 ({{Implementation-Build: trunk@r1292625;
2012-02-23 03:20:30+0000}})

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