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複数のバックグラウンドプロセスが全て成功したか判別する方法

Last updated at Posted at 2016-06-28

環境

bash4.3

スクリプト

.sh
#!/bin/sh -x
pids=()
# ok.sh は 0 を返す
# ng.sh は 1 を返す
commands=("./ok.sh" "./ng.sh")

for command in ${commands[@]}; do
  ${command} &
  pids+=($!)
done

for pid in ${pids[@]}; do
  wait $pid
  if [ $? -ne 0 ]; then
    exit 1
  fi
done

ポイント

  • $! : 最後に起動したバックグラウンドプロセスのPID
  • wait ${pid} で、対象のpidのプロセスが終了するまで待機
  • wait の戻り値は、対象のプロセスの戻り値

参考

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