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freshclamのERROR: chdir_tmp: Can't create directoryが出ない様に修正する
freshclamのERROR: chdir_tmp: Can't create directoryが出ない様に修正する
０．改訂履歴
１．はじめに
このドキュメントでは，フリーのアンチウイルスソフトであるclamXavで，パターンファイルのアップデートを行うfreshclamが動作し
た際にコンソールや実行ログにエラーがでているが，これの原因を探り，対処を行う手順を説明する．
このエラーは，実際には発生していても挙動に問題ないが，別のエラーを探す時に無駄なログがでているとノイズになるので，エラーを解消する．
２．エラーの確認と現象を探る
- ターミナルを起動すると，次の様にメールが来ていることが分かる．
Last login: Wed Mar 31 14:01:51 on ttys001
You have new mail.
macbook:~ ujpadmin$
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macbook:~ ujpadmin$ mail
Mail version 8.1 6/6/93. Type ? for help.
"/var/mail/ujpadmin": 9 messages 9 new
>N 1 ujpadmin@macbook.local Tue Mar 23 00:45 19/825 "Cron <ujpadmin@macbook> "
N 2 ujpadmin@macbook.local Wed Mar 24 00:45 19/825 "Cron <ujpadmin@macbook> "
N 3 ujpadmin@macbook.local Thu Mar 25 00:45 19/825 "Cron <ujpadmin@macbook> "
N 4 ujpadmin@macbook.local Fri Mar 26 00:45 19/825 "Cron <ujpadmin@macbook> "
N 5 ujpadmin@macbook.local Mon Mar 29 00:45 19/825 "Cron <ujpadmin@macbook> "
N 6 ujpadmin@macbook.local Tue Mar 30 00:45 19/825 "Cron <ujpadmin@macbook> "
N 7 ujpadmin@macbook.local Wed Mar 31 00:45 19/825 "Cron <ujpadmin@macbook> "
N 8 ujpadmin@macbook.local Thu Apr 1 00:45 19/825 "Cron <ujpadmin@macbook> "
N 9 ujpadmin@macbook.local Fri Apr 2 00:45 19/825 "Cron <ujpadmin@macbook> "
?
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Message 1:
From ujpadmin@macbook.local Tue Mar 23 00:45:11 2010
X-Original-To: ujpadmin
Delivered-To: ujpadmin@macbook.local
From: ujpadmin@macbook.local (Cron Daemon)
To: ujpadmin@macbook.local
Subject: Cron <ujpadmin@macbook> /usr/local/clamXav/bin/freshclam --quiet --log=/
usr/local/clamXav/share/clamav/freshclam.log; open /usr/local/clamXav/share/
clamav/freshclam.log
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=ujpadmin>
X-Cron-Env: <USER=ujpadmin>
X-Cron-Env: <HOME=/Users/ujpadmin>
Date: Tue, 23 Mar 2010 00:45:02 +0900 (JST)
ERROR: chdir_tmp: Can't create directory ./clamav-7756d2e08bc8315cddc6fec28cce28
08
?
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macbook:~ ujpadmin$ crontab -l
45 00 * * 1,2,3,4,5 /usr/local/clamXav/bin/freshclam
--quiet --log=/usr/local/clamXav/share/clamav/freshclam.log; open /usr/local/
clamXav/share/clamav/freshclam.log
macbook:~ ujpadmin$
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- 手動で実行してみる．
- 実行する際に，デバッグ用オプションを付けてみる．
- 利用できるオプションを確認する．
macbook:~ ujpadmin$ /usr/local/clamXav/bin/freshclam -h
Clam AntiVirus: freshclam 0.95.3
By The ClamAV Team: http://www.clamav.net/team
(C) 2007-2009 Sourcefire, Inc. et al.
--help -h show help
--version -V print version number and exit
--verbose -v be verbose
--debug enable debug messages
--quiet only output error messages
--no-warnings don't print and log warnings
--stdout write to stdout instead of stderr
--config-file=FILE read configuration from FILE.
--log=FILE -l FILE log into FILE
--daemon -d run in daemon mode
--pid=FILE -p FILE save daemon's pid in FILE
--user=USER -u USER run as USER
--no-dns force old non-DNS verification method
--checks=#n -c #n number of checks per day, 1 <= n <= 50
--datadir=DIRECTORY download new databases into DIRECTORY
--daemon-notify[=/path/clamd.conf] send RELOAD command to clamd
--local-address=IP -a IP bind to IP for HTTP downloads
--on-update-execute=COMMAND execute COMMAND after successful update
--on-error-execute=COMMAND execute COMMAND if errors occured
--on-outdated-execute=COMMAND execute COMMAND when software is outdated
--list-mirrors print mirrors from mirrors.dat
--submit-stats[=/path/clamd.conf] only submit detection statistics
macbook:~ ujpadmin$
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macbook:~ ujpadmin$ /usr/local/clamXav/bin/freshclam --verbose
Current working dir is /usr/local/clamXav/share/clamav
Max retries == 3
ClamAV update process started at Fri Apr 2 18:07:50 2010
Using IPv6 aware code
Querying current.cvd.clamav.net
TTL: 783
Software version from DNS: 0.96
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.95.3 Recommended version: 0.96
DON'T PANIC! Read http://www.clamav.net/support/faq
main.cvd version from DNS: 52
main.cld is up to date (version: 52, sigs: 704727, f-level: 44, builder: sven)
daily.cvd version from DNS: 10691
Retrieving http://database.clamav.net/daily-10690.cdiff
Trying host database.clamav.net (130.59.10.36)...
Trying to download http://database.clamav.net/daily-10690.cdiff (IP: 130.59.10.3
6)
Downloading daily-10690.cdiff [100%]
cdiff_apply: Parsed 11 lines and executed 11 commands
ERROR: chdir_tmp: Can't create directory ./clamav-0a94239e13acd2066e0bbe2fb92b0b
65
WARNING: Incremental update failed, trying to download daily.cvd
Whitelisting short-term blacklisted mirrors
Retrieving http://database.clamav.net/daily.cvd
Trying to download http://database.clamav.net/daily.cvd (IP: 130.59.10.36)
Downloading daily.cvd [100%]
daily.cvd updated (version: 10691, sigs: 49537, f-level: 44, builder: neo)
Database updated (754264 signatures) from database.clamav.net (IP: 130.59.10.36)
Clamd successfully notified about the update.
macbook:~ ujpadmin$
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- エラーがでているが，パターンファイルのdaily.cvdはダウンロードできている事が確認できる．
- もう一度実行してみる．
macbook:tmp ujpadmin$ /usr/local/clamXav/bin/freshclam --verbose
Current working dir is /usr/local/clamXav/share/clamav
Max retries == 3
ClamAV update process started at Sat Apr 3 01:36:28 2010
Using IPv6 aware code
Querying current.cvd.clamav.net
TTL: 239
Software version from DNS: 0.96
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.95.3 Recommended version: 0.96
DON'T PANIC! Read http://www.clamav.net/support/faq
main.cvd version from DNS: 52
main.cld is up to date (version: 52, sigs: 704727, f-level: 44, builder: sven)
daily.cvd version from DNS: 10695
daily.cvd is up to date (version: 10695, sigs: 49556, f-level: 44, builder: ccordes)
macbook:tmp ujpadmin$
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- up to dateとでているので，１回目の実行でダウンロードできている事が確認できた．
- このエラーは，ダウンロード時に利用するディレクトリに，パーミッションが無いためにでるエラーであるが，実質問題ない．
- ただし，エラーがでているのは気持ち悪いので，修正する．
３．ディレクトリのパーミッションを変更する
- freshclamのログをよく見ると，ワーキングディレクトリが記載されている．
macbook:tmp ujpadmin$ /usr/local/clamXav/bin/freshclam --verbose
Current working dir is /usr/local/clamXav/share/clamav
Max retries == 3
ClamAV update process started at Sat Apr 3 13:25:49 2010
Using IPv6 aware code
Querying current.cvd.clamav.net
TTL: 294
Software version from DNS: 0.96
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.95.3 Recommended version: 0.96
DON'T PANIC! Read http://www.clamav.net/support/faq
main.cvd version from DNS: 52
main.cld is up to date (version: 52, sigs: 704727, f-level: 44, builder: sven)
daily.cvd version from DNS: 10699
daily.cvd is up to date (version: 10699, sigs: 49678, f-level: 44, builder:
guitar)
macbook:tmp ujpadmin$
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macbook:tmp ujpadmin$ ls -la /usr/local/clamXav/share/clamav
total 114504
drwxrwxr-x 7 _clamav _clamav 238 4 3 13:10 .
drwxr-xr-x 4 root wheel 136 11 8 00:53 ..
-rw-r--r-- 1 _clamav _clamav 755066 1 7 14:30 clamav-137326c601747a2c25
dcd1bf5b7cdfab
-rw-r--r-- 1 _clamav _clamav 1166406 4 3 13:10 daily.cvd
-rw-rw-rw- 1 _clamav _clamav 24096 4 3 13:13 freshclam.log
-rw-r--r-- 1 _clamav _clamav 56671744 2 18 00:45 main.cld
-rw------- 1 _clamav _clamav 780 4 3 13:25 mirrors.dat
macbook:tmp ujpadmin$
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- ログファイルが格納されていることが分かる．
- ファイル名clamav-〜で始まるファイルが古いことが確認できる．つまり，更新されていない．
macbook:tmp ujpadmin$ ls -la /usr/local/clamXav/share/
total 0
drwxr-xr-x 4 root wheel 136 11 8 00:53 .
drwxr-xr-x 8 root wheel 272 1 12 17:18 ..
drwxrwxr-x 7 _clamav _clamav 238 4 3 13:10 clamav
drwxr-xr-x 5 root wheel 170 11 8 00:53 man
macbook:tmp ujpadmin$
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- clamavディレクトリに，その他のユーザからの書き込み権限が無い．
- 現在はujpadminユーザでcronを実行しており，clamavディレクトリに権限が無いという事になる．
- その他のユーザからの書き込み権限を付与し，確認する．
macbook:tmp ujpadmin$ sudo chmod o+w /usr/local/clamXav/share/clamav
Password:■■■■■■■■■■
macbook:tmp ujpadmin$ ls -la /usr/local/clamXav/share/
total 0
drwxr-xr-x 4 root wheel 136 11 8 00:53 .
drwxr-xr-x 8 root wheel 272 1 12 17:18 ..
drwxrwxrwx 7 _clamav _clamav 238 4 3 13:10 clamav
drwxr-xr-x 5 root wheel 170 11 8 00:53 man
macbook:tmp ujpadmin$
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４．freshclamを使いエラーが出ない
か，確認する
- パーミッションを変更したので，freshclamを使って更新し，エラーが無いか確認する．
- なお，freshclamではパターンファイルが更新されてないとダウンロードされないので，しばらく時間が経過した後に行う．
- また，土日はパターンファイルが更新されない事が多いようなので，タイミングに気をつける．
macbook:tmp ujpadmin$ /usr/local/clamXav/bin/freshclam --verbose
Current working dir is /usr/local/clamXav/share/clamav
Max retries == 3
ClamAV update process started at Mon Apr 5 16:53:36 2010
Using IPv6 aware code
Querying current.cvd.clamav.net
TTL: 386
Software version from DNS: 0.96
WARNING: Your ClamAV installation is OUTDATED!
WARNING: Local version: 0.95.3 Recommended version: 0.96
DON'T PANIC! Read http://www.clamav.net/support/faq
main.cvd version from DNS: 52
main.cld is up to date (version: 52, sigs: 704727, f-level: 44, builder: sven)
daily.cvd version from DNS: 10700
Retrieving http://database.clamav.net/daily-10700.cdiff
Trying host database.clamav.net (219.106.242.51)...
Trying to download http://database.clamav.net/daily-10700.cdiff (IP: 219.106.242.
51)
Downloading daily-10700.cdiff [100%]
cdiff_apply: Parsed 13 lines and executed 13 commands
daily.cld updated (version: 10700, sigs: 49681, f-level: 44, builder: guitar)
Database updated (754408 signatures) from database.clamav.net (IP: 219.106.242.5
1)
Clamd successfully notified about the update.
macbook:tmp ujpadmin$
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