I have been using the construct described below in a restore script for
the last 6 years. On upgrading from GNU tar 1.20, I see an unexpected
change in listing/restoring behavior when the --strip-components=N
option is used with --occurrence=1 option. I don't know if this is
specific to directories in which the file names begin with the same
string as the directory requested, but in the past, I would get the
entire directory rather than just the first file in the directory when
doing a restore. My intent in using the --occurrence=1 is to save time
when I know that there will only be one instance of the directory on the
tape, often quite near the start of the tape. I have verified that the
additional files are on the tape/in the archive by doing a restore
without using the --occurrence=1 option.
Please let me know if I can provide additional information and/or build
a test version of tar for you. I have access to AIX 5.3 and 6.1
development hosts and Fedora 12 Linux hosts. It would appear that the
code which compares the current file to the requested spec does not take
into account the fact that the first occurrence is a directory name and
the second one a file name. I could build a debug version and step
through the code if need be.
Richard Nolde
Systems Programmer
[email protected]
Simple case to reproduce the problem, which I am seeing with GNU tar
1.22 on Linux Fedora 12 and GNU tar 1.25 on AIX 6.1.
On my Linux Fedora 12 host
tar --version
tar (GNU tar) 1.22
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
On my AIX 6.1 host
tar --version
tar (GNU tar) 1.25
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by John Gilmore and Jay Fenlason.
Tests on the Fedora box to reproduce the problem.
ls -l /archive/fedora/nmon
total 1056
-rw-rw-rw- 1 nolde nolde 217680 2010-11-18 21:05 nmon_x86_64_fedora14
-rw-rw-rw- 1 nolde nolde 217828 2010-11-23 21:57 nmon_x86_64_rhel4
-rw-rw-rw- 1 nolde nolde 219767 2010-11-24 01:23 nmon_x86_64_rhel5
-rw-rw-rw- 1 nolde nolde 219767 2010-11-23 21:57 nmon_x86_64_rhel54
-rwxrwxrwx 1 nolde nolde 195750 2010-11-18 21:04 nmon_x86_fedora14
tar -cvf /tmp/nmon.tar /archive/fedora/nmon
tar: Removing leading `/' from member names
/archive/fedora/nmon/
/archive/fedora/nmon/nmon_x86_64_rhel4
/archive/fedora/nmon/nmon_x86_64_rhel5
/archive/fedora/nmon/nmon_x86_fedora14
/archive/fedora/nmon/nmon_x86_64_rhel54
/archive/fedora/nmon/nmon_x86_64_fedora14
tar -tvf /tmp/nmon.tar
drwxrwxr-x nolde/nolde 0 2011-01-16 21:54 archive/fedora/nmon/
-rw-rw-rw- nolde/nolde 217828 2010-11-23 21:57
archive/fedora/nmon/nmon_x86_64_rhel4
-rw-rw-rw- nolde/nolde 219767 2010-11-24 01:23
archive/fedora/nmon/nmon_x86_64_rhel5
-rwxrwxrwx nolde/nolde 195750 2010-11-18 21:04
archive/fedora/nmon/nmon_x86_fedora14
-rw-rw-rw- nolde/nolde 219767 2010-11-23 21:57
archive/fedora/nmon/nmon_x86_64_rhel54
-rw-rw-rw- nolde/nolde 217680 2010-11-18 21:05
archive/fedora/nmon/nmon_x86_64_fedora14
tar -tv --strip-components=2 -f /tmp/nmon.tar archive/fedora/nmon
drwxrwxr-x nolde/nolde 0 2011-01-16 21:54 archive/fedora/nmon/
-rw-rw-rw- nolde/nolde 217828 2010-11-23 21:57
archive/fedora/nmon/nmon_x86_64_rhel4
-rw-rw-rw- nolde/nolde 219767 2010-11-24 01:23
archive/fedora/nmon/nmon_x86_64_rhel5
-rwxrwxrwx nolde/nolde 195750 2010-11-18 21:04
archive/fedora/nmon/nmon_x86_fedora14
-rw-rw-rw- nolde/nolde 219767 2010-11-23 21:57
archive/fedora/nmon/nmon_x86_64_rhel54
-rw-rw-rw- nolde/nolde 217680 2010-11-18 21:05
archive/fedora/nmon/nmon_x86_64_fedora14
tar -tv --occurrence=1 --strip-components=2 -f /tmp/nmon.tar
archive/fedora/nmon
drwxrwxr-x nolde/nolde 0 2011-01-16 21:54 archive/fedora/nmon/
-rw-rw-rw- nolde/nolde 217828 2010-11-23 21:57
archive/fedora/nmon/nmon_x86_64_rhel4
tar -tv --strip-components=2 --occurrence=1 -f /tmp/nmon.tar
archive/fedora/nmon
drwxrwxr-x nolde/nolde 0 2011-01-16 21:54 archive/fedora/nmon/
-rw-rw-rw- nolde/nolde 217828 2010-11-23 21:57
archive/fedora/nmon/nmon_x86_64_rhel4
tar -xv --strip-components=2 --occurrence=1 -f /tmp/nmon.tar
archive/fedora/nmon
archive/fedora/nmon/
archive/fedora/nmon/nmon_x86_64_rhel4
[nolde@aeolus tmp]$ ls -l nmon
total 216
-rw-rw-r-- 1 nolde nolde 217828 2010-11-23 21:57 nmon_x86_64_rhel4
