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Re: cp and "blah/." or "." as a source
From: |
Eric Blake |
Subject: |
Re: cp and "blah/." or "." as a source |
Date: |
Sun, 03 Dec 2006 20:39:22 -0700 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.8) Gecko/20061025 Thunderbird/1.5.0.8 Mnenhy/0.7.4.666 |
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According to Zak on 12/3/2006 8:57 AM:
> Hi,
>
> What should happen when I copy a directory ending in "/." to another
> directory? Like:
> cp -a src/. dst
...
>
> This means it handles dotfiles as well - a much neater way to copy them
> than using ugly wildcards, tar, rsync, find or whatever else. The
> documentation doesn't make it clear (to me anyway) what /should/ happen
> here, but I'd guess (wildly) that POSIX says cp should fail and do
> nothing rather than do what it does.
- -a is a GNU extension, so POSIX says nothing about how it behaves. But
the GNU documentation ('cp --help', for instance) says it is short for cp
- -dpPR, which means it copies entire hierarchies, recursively, preserving
attributes and symlinks. It should not matter whether you spell the
source as 'src/.' or the shorter 'src', since both spellings name the same
hierarchy.
> So what I'm really looking for
> here is to have the current behaviour classified one way (correct, and
> explicitly stated as the expected outcome in the docs)
Yes, the behavior you posted looks like it matches the documentation.
- --
Life is short - so eat dessert first!
Eric Blake address@hidden
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