if condition on adb logcat doesn't work

Question

I am trying the following code to get if condition on adb logcat:-

Search for the Exception or ANR (Activity Not Responding) on com.testapp.demo package If any Exception or ANR is found it will save the logs into the destination folder

if adb logcat | grep 'Exception*'
then
    adb logcat -d > $SILENT_EXCEPTION_FILE
fi

but I am not able to save it. Somehow this command does not work.

Answer 1

adb logcat outputs the logs as they arrive and never exits, so adb logcat | grep adb logcat | grep never exits either. adb logcat -d should be used if you want to read the current logs.

Answer 2

我建议使用以下内容：

adb logcat | grep --line-buffered 'Exception*' > $SILENT_EXCEPTION_FILE