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bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use
From: |
Eric Blake |
Subject: |
bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call |
Date: |
Thu, 21 Nov 2013 10:34:35 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0 |
On 11/21/2013 10:18 AM, Bob Proulx wrote:
>
>> Instead, she wants a command that will recursively remove the
>> children of ".", but then leave "." itself unremoved (whether by
>> virtue of the fact that rmdir(".") must fail
>
> I am missing this part. Why must it fail? And in fact as per my test
> case above it succeeds.
No, if there were no nanny rule, then there is a difference between:
rm -r $PWD # Deletes dir out of under your feet, if allowed
rm -r . # leaves dir empty
rmdir(pwd) can succeed (true on Linux; it can also fail if the system
deems that a directory in use as a pwd can't be deleted - mingw is one
such system)
rmdir(".") MUST fail (rmdir(2) can only delete a directory if specified
by a non-. name)
Linda was asking to delete children but NOT the directory; she did NOT
want to use 'rm -r $PWD' because that attempts (and may succeed) at
deleting pwd. But she was ticked off that the nanny rules on "."
prevented recursion from even being attempted.
>
> Agreed. And I rather like the --children-only semantics you have
> proposed. It creates a generally useful behavior regardless of other
> things. It isn't quite the same as bypassing the nanny rule for '.'
Indeed - and if we still keep the nanny rule, then Linda would have to
use 'rm -r --children-only $PWD' because the nanny rule would block 'rm
-r --children-only .'; but since --children-only takes us out of the
realm of POSIX, we can also use it to skip the nanny rule.
> but it solves the issue while doing something generally useful at the
> same time. Have to like it when it is two birds with one stone. :-)
Yay - I'm glad that we appear to have come to what seems to be a useful
conclusion.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, (continued)
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Eric Blake, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Bernhard Voelker, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Eric Blake, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Bernhard Voelker, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Eric Blake, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Bernhard Voelker, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Eric Blake, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Jim Meyering, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Jim Meyering, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Bob Proulx, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call,
Eric Blake <=
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Linda Walsh, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Pádraig Brady, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Eric Blake, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Eric Blake, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Pádraig Brady, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Eric Blake, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Bob Proulx, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Eric Blake, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Linda Walsh, 2013/11/21
- bug#15926: RFE: unlink command already uses 'unlink' call; make 'rm' use 'remove' call, Pádraig Brady, 2013/11/21