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From "Tim Nickels (JIRA)" <j...@apache.org>
Subject [jira] [Created] (VFS-617) isReadable fails if unable to determine group identity
Date Thu, 30 Jun 2016 11:07:10 GMT
Tim Nickels created VFS-617:
-------------------------------

             Summary: isReadable fails if unable to determine group identity
                 Key: VFS-617
                 URL: https://issues.apache.org/jira/browse/VFS-617
             Project: Commons VFS
          Issue Type: Bug
    Affects Versions: 2.1
         Environment: Windows 7 Java 7. Failure occured connecting via SFTP to a Synology
box running DSM 6.
            Reporter: Tim Nickels


The doIsReadable method of SftpFileObject throws an exception if the system cannot identify
group/owner permissions....... 

Exception in thread "main" org.apache.commons.vfs2.FileSystemException: Could not determine
if file "sftp://myURI" is readable.
	at org.apache.commons.vfs2.provider.AbstractFileObject.isReadable(AbstractFileObject.java:1761)
	at com.avenca.vfs.VFSUtils.main(VFSUtils.java:41)
Caused by: com.jcraft.jsch.JSchException: Could not get the groups id of the current user
(error code: 1)
	at org.apache.commons.vfs2.provider.sftp.SftpFileSystem.getGroupsIds(SftpFileSystem.java:263)
	at org.apache.commons.vfs2.provider.sftp.SftpFileObject.getPermissions(SftpFileObject.java:317)
	at org.apache.commons.vfs2.provider.sftp.SftpFileObject.doIsReadable(SftpFileObject.java:335)
	at org.apache.commons.vfs2.provider.AbstractFileObject.isReadable(AbstractFileObject.java:1757)

The problem is the method is using 

return getPermissions(true).isReadable()

The folder *is* readable without these permissions, and so should be set to

return getPermissions(false).isReadable()

Which correctly allows the system to identify a readable folder without adding unnecessary
restrictions.




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