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https://issues.apache.org/jira/browse/VFS-590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16296786#comment-16296786
]
L commented on VFS-590:
-----------------------
As I wrote in the description:
{quote}Performing moveTo without this check might successfully rename the file.
{quote}
In our case it worked: the server had disabled SSH channelExec. After patching
commons-vfs not to perform all those isWriteable() moveTo() completed
successfully.
> SFTP moveTo operation might fail on permission checks even if the operation
> itself might succeed
> ------------------------------------------------------------------------------------------------
>
> Key: VFS-590
> URL: https://issues.apache.org/jira/browse/VFS-590
> Project: Commons VFS
> Issue Type: Bug
> Affects Versions: Nightly Builds
> Reporter: L
>
> Continuing with SFTP moveTo, see VFS-588 and VFS-589 for more details.
> The permission checks that VFS performs during moveTo() can result in
> failure.
> org.apache.commons.vfs2.provider.AbstractFileObject.moveTo(final FileObject
> destFile) starts with some checks:
> {code:java}
> @Override
> public void moveTo(final FileObject destFile) throws FileSystemException
> {
> if (canRenameTo(destFile))
> {
> if (!getParent().isWriteable())
> {
> throw new
> FileSystemException("vfs.provider/rename-parent-read-only.error",
> getName(),
> getParent().getName());
> }
> }
> else
> {
> if (!isWriteable())
> {
> throw new
> FileSystemException("vfs.provider/rename-read-only.error", getName());
> }
> }
> {code}
> The problem is: isWriteable() might fail or even hang. Performing moveTo
> without this check might successfully rename the file.
> isWriteable() in case of SFTP can fail if the server disables SSH
> channelExec. Or if it does not support "id" command.
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