CODEWITHSUNDEEP
androidfiletextgreplogcat
AndroidGuy
AndroidGuy

Reputation: 1330

grep the adb logcat & write the output to a text file

I want to grep the adb logcat and write the output to a text file. If I just do:

./adb logcat > std.txt

it writes the entire log to the text file. If I do:

./adb logcat | grep ABC

it prints all lines containing ABC to my terminal. But now I wish to search for ABC & write only these lines to a text file.

This:

./adb logcat | grep ABC > std.txt

doesn't work.

What's the correct command?

Upvotes: 41

Views: 71053

Answers (8)

El David
El David

Reputation: 696

try this

adb logcat -d -e "ABC" > std.txt

Upvotes: 0

Adnama
Adnama

Reputation: 172

Save LogCat To A Text File

"To save LogCat to a text file open up a terminal window and type: adb logcat -d > logcat.txt"

Upvotes: 1

pierrotlefou
pierrotlefou

Reputation: 40811

Try adb logcat | grep ABC | tee out

Upvotes: 3

Levente Kurusa
Levente Kurusa

Reputation: 1866

This is working for me:

./adb logcat | grep ABC | dd of=/home/levex/dump.txt

Explanation: ./adb logcat opens the logcat, and then it goes through a pipe to grep ABC which filters the lines to those containing ABC, and then again through a pipe to dd of=/home/levex/dump.txt to finally print it to a file. of=xxx parameter sets the output file.

Upvotes: 5

Vishnuprasad R
Vishnuprasad R

Reputation: 1730

Edit: This seems to work 

 ./adb logcat |grep --line-buffered  ABC >a.txt

I can explain you what is happening heres. Hope someone can derive a solution from that.If you run the following command in terminal 

cat |grep "ABC"

and start entering lines of text, you can see that grep immediately outputs any lines that contains. 

 cat somefile.txt | grep "ABC"

will print all lines that contains 'ABC' to the terminal, as expected.

But if you run

cat |grep ABC >a.txt

and start entering text on the terminal, you can see that the file is not written until you enter an EOF character (Ctrl+ D) and make cat terminate.

But using --line-buffered gives output in the expected way

cat |grep --line-buffered  ABC >a.txt

Upvotes: 6

Brtle
Brtle

Reputation: 2297

I think there is a problem with grep buffering. You can try something like this:

./adb logcat | grep --line-buffered ABC > std.txt

It should be the same problem for chained grep.

EDIT: A similar question can be found here: Why no output is shown when using grep twice?.

Upvotes: 58

Thomas J Younsi
Thomas J Younsi

Reputation: 61

Something like that maybe looking for all entries with word time, testapk1 and testapk2

adb logcat -v time testapk1 testapk2 *:S -d > adblogfilter.log

Upvotes: 1

UdayaLakmal
UdayaLakmal

Reputation: 4223

Try this

./adb logcat -s "ABC" > std.txt

Upvotes: 1

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