Question

I have bash script I am running from powershell in windows that does a for loop. Every once in a while, one of the loop iteration hangs until I hit enter on the keyboard.
This doesn t happen all the time, in fact, it happens pretty rarely, but it still does.

The interesting thing is that my loop innards is basically time _command_ and so after I hit enter, it ll tell me how long the command took to run. The command actually takes way less time to execute than the loop iteration takes - because it s waiting for keyboard input for some odd reason.

It s pretty annoying to leave a script running overnight and come back in the morning to see that it didn t get very far.

Does someone knows WHY this happens and WHAT to do to get around it?

Thanks, jbu

Answer 1

I have encountered the same problem several times. Now I guess I have found the reason!

If you ever press the mouse within the powershell, it might get stuck and need user to press "enter" to continue. So the get-around-way is to make sure that you didn t accidentally press your mouse within the shell window while you are already running some program...

Answer 2

Goto the powershell properties and unselect Quick Edit / Insert check boxes. If these are selected, the console pauses output and resumes only when an Enter key is pressed ( You can identify this by monitoring the console title bar- it will switch from "Administrator:Windows PowerShell" to "Select Administrator:Windows Powershell"

Answer 3

Until you post the script, there s little we can do to help.

However, in general, one of your commands probably returns a null once in a while as input to stdin of another command which, upon seeing null looks to the terminal as stdin. Or something along those lines.

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