shell脚本中的模式匹配

Question

我需要有关模式匹配的帮助。我有以下文本作为命令的输出。

 j-13PUDS1BDAAKK     RUNNING        ec2-54-242-150-167.compute-1.amazonaws.com        Log    Processing Job Flow   
  COMPLETED      Setup Hive
  RUNNING        CopyLogs
  PENDING        CopyLogs
  PENDING        CopyLogs
  PENDING        CopyLogs

我需要将CopyLogs输出与Completed匹配。所以基本上在执行命令之后输出应该是

COMPLETED        CopyLogs
COMPLETED        CopyLogs
COMPLETED        CopyLogs
COMPLETED        CopyLogs

如何在do while循环中执行此操作（对于重试逻辑）。我尝试了以下

while :; do
result=$(elastic-mapreduce --jobflow $JOBFLOW --list) //lets say this returns the above output
[[ $result == +(*RUNNING*|*PENDING*|*WAITING*) ]] || break
done
echo "result now has no RUNNING or PENDING or WAITING"

但我只需要为＆＃34; CopyLogs＆＃34;执行此操作。我如何实现

Answer 1

result=$(elastic-mapreduce --jobflow $JOBFLOW --list|grep -P '(COMPLETED[[:space:]]*CopyLogs)')

result将带有所需的输出。

-P perl-regular expression，请检查man grep