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Old 02-21-2012, 03:32 PM   #1
metallica1973
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Registered: Feb 2003
Location: Washington D.C
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CPIO --no-absolute-filenames


I succesfully created a backup script that creates CPIO archives preserving access times and etc. I orginally created the CPIO archives using the absolute paths.

Code:
find / -depth | grep -f include| cpio -oavc | gzip > archive.cpio.gz
I am trying to extract a cpio archive into a temp directory to check to make sure things are backing up and things are ok but am having trouble because it complains about permissions and will not restore in the current directory. So

Code:
mkdir /home/testuser/extract
cd /home/testuser/extract
user@extract>gunzip archive.cpio.gz
-rw-rw-r-- 1 tester testuser 1314521600 2012-02-21 13:21 archive.cpio
user@extract>cpio -i --no-absolute-filenames < 10.7.0.180.cpio
cpio: var/lib/dpkg/info/libgnome-bluetooth7.md5sums: Cannot open: Permission denied
cpio: var/lib/dpkg/info/humanity-icon-theme.postrm: Cannot open: Permission denied
cpio: var/lib/dpkg/info/libmono-system2.0-cil.md5sums: Cannot open: Permission denied
cpio: var/lib/dpkg/info/telepathy-butterfly.preinst: Cannot open: Permission denied
cpio: var/lib/dpkg/info/ufw.md5sums: Cannot open: Permission denied
cpio: var/lib/dpkg/info/tsconf.list: Cannot open: Permission denied
cpio: var/lib/dpkg/info/acpid.md5sums: Cannot open: Permission denied
cpio: var/lib/dpkg/info/libstdc++6.shlibs: Cannot open: Permission denied
cpio: var/lib/dpkg/info/libavc1394-0.postinst: Cannot open
????

Last edited by metallica1973; 02-21-2012 at 03:34 PM.
 
Old 02-21-2012, 03:48 PM   #2
jhwilliams
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Registered: Apr 2007
Location: Portland, OR
Distribution: Debian, Android, LFS
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Rep: Reputation: 211Reputation: 211Reputation: 211
In my case (I ran your commands against /var/log as a source), I had to --make-directories at the target:

Code:
cpio -i --no-absolute-filenames --make-directories < archive.cpio
Any help?
 
Old 02-21-2012, 03:50 PM   #3
metallica1973
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Registered: Feb 2003
Location: Washington D.C
Posts: 2,190

Original Poster
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Thanks for your reply. I had an IDIOT moment:

Code:
cpio -idmv --no-absolute-filenames < 10.7.0.180.cpio
-i extract
-d create leading directories where needed
-m retain previous file modification times when creating files
-v verbose

Last edited by metallica1973; 02-21-2012 at 07:04 PM.
 
Old 02-13-2015, 09:10 AM   #4
metallica1973
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Registered: Feb 2003
Location: Washington D.C
Posts: 2,190

Original Poster
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This is simply an add on to this post if someone would like to extract a single file from a cpio file.

My preferred way:
PHP Code:
sudo cpio -icdmv --no-absolute var/spool/cron/test <test011715.cpio
ls 
-ltr
drwxrwxr
-x  2 testuser testuser     4096 Jan 14 13:36 var 
and a secondary way using a file to specify what you want to extract:
PHP Code:
cat tmpfile
var/spool/cron/test
sudo cpio 
-idmv --no-absolute-filename -E tmpfile <test011715.cpio
ls 
-ltr
drwxrwxr
-x  2 testuser testuser     4096 Jan 14 13:36 var
-
rw-rw-r--  1 testuser testuser    10000 Jan 15 13:23 tmpfile 
 
  


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