Is there a fast way to get acl's for the whole filesystem (or chunk thereof)
For backup, I am trying to dump a list of the acl's for the files being
backed up since my backup program doesn't handle the acls.
When I use something like:
find /c -exec getfacl {} \; mysavefile
It is slow, in part at least because it has to fork a call to getfacl on
each file found.
Is there a faster way to do this (hopefully without having to go write
C-code)?
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Re: Is there a fast way to get acl's for the whole filesystem (or chunk thereof)
On 11/05/2009 05:00 PM, aputerguy wrote:
For backup, I am trying to dump a list of the acl's for the files being
backed up since my backup program doesn't handle the acls.
When I use something like:
find /c -exec getfacl {} \; mysavefile
It is slow, in part at least because it has to fork a call to getfacl on
each file found.
Is there a faster way to do this (hopefully without having to go write
C-code)?
find /c -exec getfacl {} \+ mysavefile
?
--
Larry Hall http://www.rfk.com
RFK Partners, Inc. (508) 893-9779 - RFK Office
216 Dalton Rd. (508) 893-9889 - FAX
Holliston, MA 01746
_
A: Yes.
Q: Are you sure?
A: Because it reverses the logical flow of conversation.
Q: Why is top posting annoying in email?
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Re: Is there a fast way to get acl's for the whole filesystem (or chunk thereof)
aputerguy wrote:
For backup, I am trying to dump a list of the acl's for the files being
backed up since my backup program doesn't handle the acls.
When I use something like:
find /c -exec getfacl {} \; mysavefile
It is slow, in part at least because it has to fork a call to getfacl on
each file found.
Don't use -exec; use -print0 and pipe the output to xargs -0 getfacl.
cheers,
DaveK
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Re: Is there a fast way to get acl's for the whole filesystem (or chunk thereof)
For backup, I am trying to dump a list of the acl's for the files being
backed up since my backup program doesn't handle the acls.
When I use something like:
find /c -exec getfacl {} \; mysavefile
It is slow, in part at least because it has to fork a call to getfacl on
each file found.
Is there a faster way to do this (hopefully without having to go write
C-code)?
getfacl -R?
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Re: Is there a fast way to get acl's for the whole filesystem (or chunk thereof)
Andrew Schulman wrote:
For backup, I am trying to dump a list of the acl's for the files being
backed up since my backup program doesn't handle the acls.
When I use something like:
find /c -exec getfacl {} \; mysavefile
It is slow, in part at least because it has to fork a call to getfacl on
each file found.
Is there a faster way to do this (hopefully without having to go write
C-code)?
getfacl -R?
I think you're guessing. There's no -R option in the getfacl --help
output and it got rejected when I tried it just in case.
cheers,
DaveK
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Re: Is there a fast way to get acl's for the whole filesystem (or chunk thereof)
Andrew Schulman-3 wrote: getfacl -R? Unfortunately, no '-R' at least on my updated version. The -exec ... \+ and the -print0 | xargs -0 tricks both worked!!! Thanks. Timing and comparing the two approaches, it seems like they both use the same 'user' time but the xargs approach uses only about half the 'system' time. -- View this message in context: http://old.nabble.com/Is-there-a-fast-way-to-get-acl%27s-for-the-whole-filesystem-%28or-chunk-thereof%29-tp26222793p26226433.html Sent from the Cygwin list mailing list archive at Nabble.com. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Re: Is there a fast way to get acl's for the whole filesystem (or chunk thereof)
OK... one small problem. Every ~4500 lines and (70-80K characters), both of these methods omit the empty line between the getfacl stanzas. The skipped lines however don't occur at the same places in the two different methods. I assume it must be due to buffering of the long line input or something, but I would like to correct for it. Preferably correct it before it occurs rather than having to use some sed or perl magic to clean up the file afterward. Any suggestions? -- View this message in context: http://old.nabble.com/Is-there-a-fast-way-to-get-acl%27s-for-the-whole-filesystem-%28or-chunk-thereof%29-tp26222793p26226546.html Sent from the Cygwin list mailing list archive at Nabble.com. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Re: Is there a fast way to get acl's for the whole filesystem (or chunk thereof)
On 11/05/2009 11:05 PM, aputerguy wrote: OK... one small problem. Every ~4500 lines and (70-80K characters), both of these methods omit the empty line between the getfacl stanzas. The skipped lines however don't occur at the same places in the two different methods. I assume it must be due to buffering of the long line input or something, but I would like to correct for it. Preferably correct it before it occurs rather than having to use some sed or perl magic to clean up the file afterward. Any suggestions? $ getfacl ~/.vim/colors/mine.vim; getfacl ~/.bash_history; getfacl.exe /tmp/tt # file: /home/lhall/.vim/colors/mine.vim # owner: lhall # group: None user::rwx group::--- mask:rwx other:--- # file: /home/lhall/.bash_history # owner: lhall # group: None user::rw- group::--- mask:rwx other:--- # file: /tmp/tt # owner: lhall # group: None user::rw- group::r-- mask:rwx other:r-- What empty line between the getfacls stanzas? -- Larry Hall http://www.rfk.com RFK Partners, Inc. (508) 893-9779 - RFK Office 216 Dalton Rd. (508) 893-9889 - FAX Holliston, MA 01746 _ A: Yes. Q: Are you sure? A: Because it reverses the logical flow of conversation. Q: Why is top posting annoying in email? -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Re: Is there a fast way to get acl's for the whole filesystem (or chunk thereof)
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
According to Larry Hall (Cygwin) on 11/5/2009 9:13 PM:
What empty line between the getfacls stanzas?
The blank line that is output after one getfacl process ends. Try
'getfacl . .; getfacl .' vs. 'getfacl .; getfacl . .' to see it.
The number of command line arguments pieced together without exceeding
exec() limits is dependent on the sum of the command line length and the
size of the current environment; but since the 'find -exec {} +' and 'find
- -print0 | xargs -0' approaches see a slightly different environment
variables (in particular, $_ will be a different length between the two
invocations), the wraparound point for creating new processes differs.
But if you WANT to guarantee a newline between processes, just ask for it.
Here's one way:
find -print0 | xargs -0 sh -c 'getfacl $@; echo' sh
- --
Don't work too hard, make some time for fun as well!
Eric Blake e...@byu.net
volunteer cygwin findutils maintainer
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Re: Is there a fast way to get acl's for the whole filesystem (or chunk thereof)
Andrew Schulman wrote:
For backup, I am trying to dump a list of the acl's for the files being
backed up since my backup program doesn't handle the acls.
When I use something like:
find /c -exec getfacl {} \; mysavefile
It is slow, in part at least because it has to fork a call to getfacl on
each file found.
Is there a faster way to do this (hopefully without having to go write
C-code)?
getfacl -R?
I think you're guessing. There's no -R option in the getfacl --help
output and it got rejected when I tried it just in case.
Well, only partly. I was looking at getfacl on my Debian box at home, and it
does have an -R option for recursive retrieval. Strange that Cygwin doesn't
have it.
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