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Date:      Mon, 28 Dec 2009 17:16:16 +0200
From:      =?windows-1251?B?yu7t/Oru4iDF4uPl7ejp?= <kes-kes@yandex.ru>
To:        Matthew Seaman <m.seaman@infracaninophile.co.uk>
Cc:        freebsd-questions@freebsd.org
Subject:   Re[2]: How to force tar to be quiet?
Message-ID:  <308399180.20091228171616@yandex.ru>
In-Reply-To: <4B3882BF.7060104@infracaninophile.co.uk>
References:  <1846015154.20091227185106@yandex.ru> <4B37AB6D.3020507@infracaninophile.co.uk> <1047257846.20091227221031@yandex.ru> <4B3882BF.7060104@infracaninophile.co.uk>

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Здравствуйте, Matthew.

Вы писали 28 декабря 2009 г., 12:04:47:

#cd /
# ls -l
total 5111
-rw-r--r--   2 root  wheel         786  7 сен  2008 .cshrc
-rw-r--r--   2 root  wheel         253  7 сен  2008 .profile
drwxrwxr-x   2 root  operator      512  8 окт  2008 .snap
-r--r--r--   1 root  wheel        6188  7 сен  2008 COPYRIGHT
drwxr-xr-x   2 root  wheel        1024 21 ноя  2008 bin
drwxr-xr-x   8 root  wheel         512 16 июн  2009 boot
lrwxr-xr-x   1 root  wheel          10  8 окт  2008 compat -> usr/compat
dr-xr-xr-x   4 root  wheel         512 15 дек 18:41 dev
lrwxr-xr-x   1 root  wheel          14 23 ноя  2008 e -> /usr/local/etc
-rw-------   1 root  wheel        4096  9 ноя 01:02 entropy
drwxr-xr-x  21 root  wheel        2560 25 дек 22:43 etc
lrwxr-xr-x   1 root  wheel           8  8 окт  2008 home -> usr/home
drwxr-xr-x   3 root  wheel        1536 21 ноя  2008 lib
drwxr-xr-x   2 root  wheel         512 21 ноя  2008 libexec
lrwxr-xr-x   1 root  wheel          36 13 янв  2009 m -> /usr/local/lib/perl5/site_perl/5.8.8
drwxr-xr-x   2 root  wheel         512  7 сен  2008 media
drwxr-xr-x   2 root  wheel         512  7 сен  2008 mnt
lrwxr-xr-x   1 root  wheel          19 14 дек  2008 p -> /home/kes/projects/
dr-xr-xr-x   1 root  wheel           0 28 дек 17:14 proc
lrwxr-xr-x   1 root  wheel          19 23 ноя  2008 r -> /usr/local/etc/rc.d
-rw-r--r--   1 root  wheel        4787 15 дек 18:42 razor-agent.log
drwxr-xr-x   2 root  wheel        2560 21 ноя  2008 rescue
drwxr-xr-x   7 root  wheel         512  3 ноя 20:53 root
lrwxr-xr-x   1 root  wheel          21  5 дек  2008 s -> /usr/local/sharedzone
drwxr-xr-x   2 root  wheel        2560 21 ноя  2008 sbin
lrwxr-xr-x   1 root  wheel          11 21 ноя  2008 sys -> usr/src/sys
-rw-rw-rw-   1 root  wheel     1854498 28 дек 07:40 test
drwxrwxrwt  12 root  wheel      520192 28 дек 15:34 tmp
drwxr-xr-x  17 root  wheel         512  3 янв  2009 usr
lrwxr-xr-x   1 root  wheel          18  4 дек  2008 v -> /usr/local/virtwww
drwxr-xr-x  29 root  wheel         512 15 дек 18:41 var
-rw-------   1 root  wheel     2727936 11 дек 10:56 verlihub.core

# uname -a
FreeBSD kes.net.ua 7.1-RELEASE FreeBSD 7.1-RELEASE #0: Sat Jan  3 01:15:39 EET 2009     kes@kes.net.ua:/usr/obj/usr/src/sys/KES_KERN_v7  i386

# df -h
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/ad1s1a    496M    267M    189M    59%    /
devfs          1.0K    1.0K      0B   100%    /dev
/dev/ad1s1f    496M    116M    340M    26%    /tmp
/dev/ad1s1g     38G     21G     14G    61%    /usr
/dev/ad1s1e    7.7G    6.1G    1.0G    86%    /var
/dev/ad1s1d     23G    8.0K     21G     0%    /usr/local/squid
procfs         4.0K    4.0K      0B   100%    /proc
devfs          1.0K    1.0K      0B   100%    /var/named/dev

Shell I use: /bin/sh

To reproduce try next:
NOTICE i have more than two (as in your example) directories to tar
I have two of them with same begin path: usr/local
usr/local/etc usr/local/virtwww


MS> Коньков Евгений wrote:
>> Здравствуйте, Matthew.
>> 
>> Вы писали 27 декабря 2009 г., 20:46:05:
>> 
>> MS> Коньков Евгений wrote:
>>>> Здравствуйте, Freebsd-questions.
>>>>
>>>> when
>>>> tar -cf file.tar /home/*
>>>> It always says:
>>>> tar: Removing leading '/' from member names
>>>>
>>>> man tar
>>>> -P Preserve pathnames...
>>>> But I do not need to preserve. I want to tar without that warning.
>>>>
>>>> How to force tar to be quiet?
>>>>
>> 
>> MS> Don't give the leading '/' in path names.  Like so:
>> 
>> MS>    tar -cf file.tar -C / home
>> 
>> MS>         Cheers,
>> 
>> MS>         Matthew  
>> 
>> # tar -cf /home/kes/backup/conf/aaa_etc.tar -C / boot/loader.conf etc/* usr/local/etc/* usr/local/virtwww/*
>> tar: No match.

MS> Yep.  As shown, you don't need '*' here.  tar(1) is perfectly capable of recursing
MS> through a directory hierarchy given only the name of the top level directory.

MS> [ * is actually expanded by your shell, rather than tar, so it's trying to match
MS> filenames against your current working directory, and not against the directory
MS> the '-C' switches tar to.] 

>> And next does not work as expected:
>> # tar -cf /home/kes/backup/conf/aaa_etc.tar -C / boot/loader.conf etc usr/local/etc usr/local/virtwww
>> 
>> I get:
>> boot
>> etc
>> mysite
>> local
>> sub
>> usr
>> virtwww

MS> Hmmm... I can't reproduce this locally.  If I run:

MS>    sudo tar -cf foo.tar -C / etc boot

MS> then I get (as expected) a tarball with the contents of /etc and /boot -- not
MS> only that, but there's nothing printed to stdout/stderr while the command runs.

MS> Are any of the directories concerned symbolic links on your system?  tar(1)
MS> handles sym-links quite carefully given that it's possible to use them to
MS> generate specially crafted tar archives that you can use to trick an unwary
MS> admin into overwriting security sensitive files.  As a rule of thumb, when
MS> specifying directory trees to back-up, try and avoid having any path components
MS> being symbolic links.

>> Why local, sub, mysite, virtwww are in ROOT or tar???
>> 'local' must be under 'usr'
>> 'virtwww' must be under 'local'
>> 'mysite' must be under 'virtwww'
>> but not in root
>> 
>> Why I get that  wrong result?

MS> You'ld need to tell us a lot more detail about your system before anyone can
MS> answer that.  We can guess -- the sym-link problems I talk about above are my
MS> attempt -- and I can tell you that the command as stated works for me, where
MS> everything is installed in a single UFS2 filesystem and it's all arranged in the
MS> natural directory tree without trying to rearrange chunks of filesystems using
MS> sym-links.  If you're doing anything different to that, then please say so.


-- 
С уважением,
 Коньков                          mailto:kes-kes@yandex.ru




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