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https://issues.apache.org/jira/browse/IO-552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17437194#comment-17437194
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Chris Boyd commented on IO-552:
-------------------------------
On Linux (with zsh, at least) the tilde is a valid character for file and
directory names.
mkdir "~"
will actually create a directory named "~" in the current directory.
touch "~foobar.txt"
will actually create a file named "~foobar.txt" in the current directory.
Pull request has been submitted here to address the issue
https://github.com/apache/commons-io/pull/297
> FilenameUtils.concat fails if second argument (fullFilenameToAdd) starts with
> '~' (tilde)
> -----------------------------------------------------------------------------------------
>
> Key: IO-552
> URL: https://issues.apache.org/jira/browse/IO-552
> Project: Commons IO
> Issue Type: Bug
> Components: Utilities
> Affects Versions: 2.2, 2.5
> Environment: Windows 7 64bit, JavaVM 1.8 32bit
> Reporter: Jochen Tümmers
> Priority: Critical
> Time Spent: 10m
> Remaining Estimate: 0h
>
> {{FilenameUtils.concat("c:/temp", "~abc.txt") returns "~abc.txt/" instead of
> "c:/temp/~abc.txt".}}
> As a result, the file would be created in the user's home directory instead
> of c:/temp.
> (Note: I Had to replace all instances of double backslashes that would
> normally appear in the java code with forward slashes as the editor cannot
> handle backslashes properly.)
> commons io 2.2. and 2.5 behave the same. 2.3 and 2.4 not tested.
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