[Stable 7] CPIO breakage/

[Xin LI]

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On 2010/06/15 17:05, Sean Bruno wrote:
> On Tue, 2010-06-15 at 17:10 -0500, Sean Bruno wrote:
>> http://svn.freebsd.org/viewvc/base?limit_changes=0&view=revision&revision=208361
>>
>> I'm not sure what's up with this update, but it hosed up the default
>> behavior of cpio.
>>
>> It appears now that -o won't do the same things that it used to:
>>
>> + cd /
>> + find -x .
>> + egrep -v '^\.(/snap|/usr/sup|/boot/kernel/kernel
>> \.[[:alpha:]_]+\.[[:digit:]]+|/boot/kernel/kernel
>> \.old|/etc/start_if.*|/etc/ssh/ssh_host_.*key|/etc/hostid|/etc/(master.passwd|passwd|spwd.db|pwd.db))'
>> + '[' -n '' ']'
>> + '[' 7 = 4 ']'
>> + '[' -n '' -a -z '' ']'
>> + '[' -n /home/backup ']'
>> + echo 'dumping / ...'
>> dumping / ...
>> + cpio -o --quiet --format crc -O /home/backup/root.amd64.cpio
>> cpio: ./dev not dumped: minor number would be truncated
>> cpio: Removing leading `/' from member names
>> cpio: ./proc not dumped: minor number would be truncated
>> cpio: Removing leading `../' from member names
>>
>> We've had to revert this change from our local tree, suggestions?
>>
>> Sean
> 
> 
> A little more background.  It looks like symlinks are getting stripped
> of their '/' which sucks.  Ideas?
> 
> Sean
> 
> e.g. /home/foo/bar -> /opt/baz/blob
> 
> becomes
> 
> home/foo/bar -> opt/baz/blob   
> 
> Yuck.

This is a security measurement I think.

- --absolute-filenames disables this behavior.

Cheers,
- -- 
Xin LI <delphij at delphij.net>	http://www.delphij.net/
FreeBSD - The Power to Serve!	       Live free or die
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