Add option to sfdisk to use maximum partition size

[Alex Bligh]

Binary package hint: util-linux

The attached patch adds the ability to make a partition the maximum size possible. This gives the equivalent functionality to omitting the size parameter in the input, but works with -N too. So this lets you resize a partition to maximum size by

  echo ",+," | sfdisk -N1 /dev/sda

This is non-trivial to do without the patch as -N makes the default size the existing size. As there is (without this patch) no way of reading the maximum size, the only option is to delete the partition and recreate it.

This is needed for cloud-init to resize an image on first boot.

[Scott Moser (smoser)]

This patch was sent upstream at http://marc.info/?l=util-linux-ng&m=129166349214423&w=2

[Alex Bligh (ubuntu-alex-org)]

This patch has now been applied upstream:

author Karel Zak <email address hidden> Thu, 9 Dec 2010 22:13:58 +0000 (23:13 +0100)
committer Karel Zak <email address hidden> Thu, 9 Dec 2010 22:13:58 +0000 (23:13 +0100)
commit f30f2bbc81ad37cdd8f50485e41550dbbd82275d
tree 97304a577f5b0d2dc93040c5777ac05b6f1a5fd3
parent 8aa504664794150c2d64923e2a63341a2b56e065

http://git.kernel.org/?p=utils/util-linux-ng/util-linux-ng.git;a=commit;h=f30f2bbc81ad37cdd8f50485e41550dbbd82275d

It would be useful to ensure this reaches Natty.

[Scott Moser (smoser)]

This is ready to go. I have a feature I'd like to get in that is much more easily done with it. Please review and pull.

[Launchpad Janitor (janitor)]

This bug was fixed in the package util-linux - 2.17.2-3.3ubuntu2

---------------
util-linux (2.17.2-3.3ubuntu2) natty; urgency=low

  * sfdisk: pull upstream support for '+' to specify maximum size for a
    partition when using -N. (LP: #686124)
  * remaining changes:
    - Since udev is required in Ubuntu, the hwclock.sh init script is
      not called on startup and the hwclockfirst.sh init script is
      removed.
    - Use wildcards for symbols file, since they use versioned symbols
      properly.
    - Remove /etc/adjtime on upgrade if it was not used.
    - Install custom blkid.conf to use /dev/.blkid.tab since we don't
      expect device names to survive a reboot
    - No lsb_release call in mount.preinst since we'd need Pre-Depends
      (LP: #383697).
    - Do not install initramfs hook, since our initramfs already handles
      including blkid.
    - Mention mountall(8) in fstab(5) manpages, along with its special
      options.
    - For the case where mount is called with a directory to mount, look
      that directory up in mountall's /lib/init/fstab if we couldn't find
      it mentioned anywhere else. This means "mount /proc", "mount /sys",
      etc. work.
    - sfdisk support for '+' with '-N' (LP: #686124)
 -- Scott Moser <email address hidden> Tue, 04 Jan 2011 20:56:59 -0500