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Subject: |
Suggestion: truncate should allow -r and -s options together |
Date: |
Tue, 25 May 2010 15:32:05 +0100 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
The manpage for truncate says:
Note that the -r and -s options are mutually exclusive.
and indeed you cannot have both:
$ truncate -r /tmp/ref -s +10M /tmp/new
truncate: you must specify one of `--size' or `--reference'
We suggest using the 'truncate' command in the 'virt-resize'
documentation[1]. We want users to create a file which is the size of
an existing file + some extra amount. Naturally this would be:
truncate -r old-disk.img -s +1G new-disk.img
but this does not work and we have to suggest that users use two
separate 'truncate' commands[2].
Related to this feature request, it would be nice if you could suffix
a size with a % sign to indicate that you want to increase a file by a
certain percentage of the old or reference size, eg:
truncate -r old-disk.img -s +10% new-disk.img
truncate -r old-disk.img -s 110% new-disk.img
Neither of these forms work at the moment.
Rich.
[1] http://libguestfs.org/virt-resize.1.html#expanding_a_virtual_machine_disk
[2]
http://git.annexia.org/?p=libguestfs.git;a=commitdiff;h=0e28e4104d96bf0bf5b88fb07bb7e5f9f6e6f41f#patch1
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming blog: http://rwmj.wordpress.com
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--- Begin Message ---
Subject: |
Re: bug#6268: Suggestion: truncate should allow -r and -s options together |
Date: |
Sat, 29 May 2010 10:44:18 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 |
On 29/05/10 09:21, Jim Meyering wrote:
> Pádraig Brady wrote:
>> Subject: [PATCH] truncate: improve handling of non regular files
>>
> Thanks again.
> This all looks fine.
OK I pushed that with an addition to NEWS.
cheers,
Pádraig.
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