Windows 10, Emacs 25.1, shell: Grep not work immediately

Question

Windows 10 (64 bit), Emacs 25.1.

I has Android application. And in console I start Android command "adb logcat" to show logs from Android device. But it's show many text. And I want to filter to show only lines that I need.

So. I want in console to show only lines that content text "com.android.testproject".

First I show text without filter:

1. Emacs: run shell (M-x shell)
2. Run android command : adb logcat

Here result. Show all text (no filter)

OK! Now I want to filter.

My steps on Windows console:

1. Open windows console: "cmd.exe"
2. Enter command: adb logcat|grep com.android.testproject
3. Result is show only lines that content text "com.android.testproject".

It's work. OK.

Here screenshot.

Now I want to do same (filter) on Emacs. My steps:

1. Open shell: "M-x shell"
2. Enter command: adb logcat|grep com.android.testproject
3. But nothing happend. Why?

But if I press "C-c C-c" (Break) then in shell success show filtered text.

Question: Why Emacs not immediately filter text?

Answer 1

Can't answer you directly, however for me, using

GNU Emacs 25.1.1 (x86_64-w64-mingw32) of 2016-09-17

and grep

c:\>grep --version
grep --version
GNU grep 2.5.4

c:\>dir | grep -i pro
dir | grep -i pro
06/08/2017  16:08    <DIR>          Program Files
24/08/2017  19:02    <DIR>          Program Files (x86)

Seem to work okay.

Perhaps if you try with -Q flag to suppress your config and try again?