[wp-trac] [WordPress Trac] #22881: upgrade fails when disk space is exhausted due to quotas

[WordPress Trac]

#22881: upgrade fails when disk space is exhausted due to quotas
-----------------------------+-----------------------------
 Reporter:  list2010@…       |       Type:  defect (bug)
   Status:  new              |   Priority:  normal
Milestone:  Awaiting Review  |  Component:  Upgrade/Install
  Version:  3.4.2            |   Severity:  normal
 Keywords:                   |
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 The upgrade from wordpress 3.4.2 to 3.5 failed due to a disk space
 limitation:

 {{{
 Downloading update from http://wordpress.org/wordpress-3.5-new-
 bundled.zip…

 Unpacking the update…

 The package could not be installed.: PCLZIP_ERR_BAD_FORMAT (-10) : Unable
 to find End of Central Dir Record signature

 Installation Failed
 }}}
 A similar bug occurs if the space for the files themselves is exhausted.
 On the same installation, functions.php was truncated at 112k, leaving the
 installation in a non-functional state.

 This kind of behaviour can be avoided with an upgrade function of the
 form:
 {{{
 # test for 64k free disk space ...
 dd if=/dev/zero of=biggish-test-file bs=1024 count=64 &&
 rm biggish-test-file &&
 wget -O - http://wordpress.org/latest.tar.gz | tar -zvx --strip-
 components=1
 }}}
 Streaming the download imposes no additional disk space requirements for
 the intermediate .zip file, but does require a change in the extraction
 code.  Streaming an update cannot be done with zip files, since the index
 is at the end.  ZIP files have to be complete, since the tag is at the
 end.  'tar' files are more suitable for streaming.

-- 
Ticket URL: <http://core.trac.wordpress.org/ticket/22881>
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