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https://issues.apache.org/jira/browse/IO-171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12601149#action_12601149
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Sebb commented on IO-171:
-------------------------
The intention was to initialise the SYSTEM state to Unknown for VMS systems.
If the user tries to use the SYSTEM setting, that should throw an Exception.
However, the use of the specific insensitive/case-sensitive settings would be
OK, because the user has chosen.
The problem with the current behaviour on VMS is that the implicit (default)
choice is not guaranteed to be correct.
There is still the general problem that the separator character and
case-sensitivity are not related in any way.
It just so happens to be true at present for Unix & Windows, but in general it
is not possible to derive one from the other.
VMS is just one example of this.
> IO assumes there are only two OSes: Windows and Unix
> ----------------------------------------------------
>
> Key: IO-171
> URL: https://issues.apache.org/jira/browse/IO-171
> Project: Commons IO
> Issue Type: Bug
> Reporter: Sebb
> Priority: Minor
>
> Just noticed that IO assumes systems are either:
> Windows-like:
> * File.separatorChar = \
> * Case-insensitive matching
> or
> Unix-like:
> * File.separatorChar = /
> * Case-sensitive matching
> It may well be true that there are only two different file sepator
> characters, but it is not true that all non-Windows systems use
> case-sensitive matching.
> For example, OpenVMS uses a file separator char of /, but originally only
> supported case-insensitive file names (always shown as uppercase).
> Current versions of OpenVMS support both upper and lower-case; the default is
> to use case-insenstive matching (and upper case names).
> Perhaps the IOCase.SYSTEM constant needs to have an "Unknown" or "Variable"
> setting for this; it would then be an error to use IOCase.SYSTEM to determine
> the case sensitivity.
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