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stdoutとstderrをそれぞれ別々にteeする方法

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備忘録。

経緯

  • bashスクリプトのログを後で確認しやすいよう stdoutstderr に分けて出力したい
  • 実装の時の動作確認では直接実行するので、両方ともコンソールで確認したい

という時に使える小ネタ。

方法

>(...) の記法(process substitutionと言うらしい)を用いてそれぞれの出力を別プロセス上でteeしてファイルと出力元に書き戻す。

$ some-script.sh 1> >(tee out.log >&1) 2> >(tee err.log >&2)

参考

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