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Date: Sat, 19 Jul 2014 09:20:38 +0000 (UTC)
From: "Steven Christou (JIRA)" <jira@apache.org>
To: issues@commons.apache.org
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Subject: [jira] [Updated] (IO-453) Regression in FileUtils.readFileToString
 from 2.0.1
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     [ https://issues.apache.org/jira/browse/IO-453?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Christou updated IO-453:
-------------------------------

    Attachment: IO-453.diff

I am attaching a diff of the code changes.

> Regression in FileUtils.readFileToString from 2.0.1
> ---------------------------------------------------
>
>                 Key: IO-453
>                 URL: https://issues.apache.org/jira/browse/IO-453
>             Project: Commons IO
>          Issue Type: Bug
>          Components: Utilities
>    Affects Versions: 2.1, 2.2, 2.3, 2.4
>            Reporter: Steven Christou
>         Attachments: IO-453.diff
>
>
> FileUtils.readFileToString has changed it's behavior to make a call from {{IOUtils.toByteArray(in)}} to {{IOUtils.toByteArray(in, file.length())}} in {{FileUtils.readFileToString}}. This is a regression because if the file.length = 0, then it will return 0. According to the javadocs for [File#length|http://docs.oracle.com/javase/6/docs/api/java/io/File.html#length()], it is possible to return 0 if it is a System dependent entities, so even though the File.length might return 0, the stream is still open and  
> Steps to reproduce (Ubuntu):
> 1. Execute {{nohup sleep 10000 &}} in a terminal, and get the process id of the sleep command ({{ps -ef | grep sleep}}).
> 2. Call {{FileUtils.readFileToString(new File("/proc/$PID/environ"));}} where $PID is the process ID from step 1.
> You will notice that in 2.0.1 it returns several elements, however in 2.1 it will return nothing.
> See [~ndeloof]'s comment in https://github.com/apache/commons-io/commit/53a40a6d9dcaaa616b404255406edc30fe2d524c.


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