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文字コードを指定してgrepする。

Last updated at Posted at 2015-08-18

今時EUCのファイルなんて殆ど使わないが、grepせざるをえなくなったのでメモ。
コンソールはUTF8なのでそのままだとgrepできない。
ただ、やることは単純でnkfで検索したい文字をeuc-jpにしてファイルをgrep。
そして結果をUTF8にしているだけ。
ただし、LANG=ja_JP.eucjpにしないとeuc-jpでgrepができないので注意。
ちなみにgrepのバージョンは2.6。

LANG=ja_JP.eucjp grep -rn `echo "あたたたた" | nkf -e` * | nkf -w

manには下記の様に書いてあって LC_ALL、LC_なんちゃら、LANGの順で優先的にロケールが使われるらしい。

ENVIRONMENT VARIABLES
    The behavior of grep is affected by the following environment variables.

    The locale for category LC_foo is specified  by  examining  the  three  environment
    variables  LC_ALL,  LC_foo, LANG, in that order.  The first of these variables that
    is set specifies the locale.  For example, if LC_ALL is not set, but LC_MESSAGES is
    set  to  pt_BR,  then  the  Brazilian Portuguese locale is used for the LC_MESSAGES
    category.  The C locale is used if none of these environment variables are set,  if
    the  locale  catalog  is  not  installed, or if grep was not compiled with national
    language support (NLS).

nkf使わないでeuc-jpでシェルスクリプトを書いて実行する手もある。
shift_JISはLANG=ja_JP.sjis, nkf -sにすれば動く。多分。

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