Take part of the string using bash

Question

I have string from log file about sending the code like:

 <timestamp> INFO   [Response--22] Code [00000000] Code was sent to [+0000002345]

Could you help me with parsing it using BASH to put the code value (8chars) to variable? Thank you for any help.

expected output is: 'code = 00000000' extracted from string " INFO [Response--22] Code [00000000] Code was sent to [+0000002345]" — AndriiZ, Oct 24 '14 at 08:12
You should edit your question to include the expected output. — Tom Fenech, Oct 24 '14 at 08:19
@tripleee funny that the question you refer to is about parsing some XML but yes, it's the same principle. — Tom Fenech, Oct 24 '14 at 08:21
@TomFenech I do wish there was better tooling for finding probable duplicates; if you can propose a better duplicate, please do. There are probably hundreds, but finding a good one is hard work. — tripleee, Oct 24 '14 at 08:31

score 0 · Answer 1 · answered Oct 24 '14 at 08:18

You could use sed to extract the value:

sed 's/.*Code *\[\([0-9]*\)].*/\1/' <<<"<timestamp> INFO   [Response--22] Code [00000000] Code was sent to [+0000002345]"
00000000

If the line is in a file, you can do sed '...' filename. To store the output to a variable, you can do x=$(sed '...' filename).

Guru · Answer 2 · 2014-10-24T08:54:14.030

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If I understood your requirement correctly:

$ x="<timestamp> INFO   [Response--22] Code [00000000] Code was sent to [+0000002345]"
$ echo "$x" | sed -r 's/.*(Code )\[([0-9]+)\].*/\1= \2/'
Code = 00000000

edited Oct 24 '14 at 08:54

answered Oct 24 '14 at 08:19

Guru

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You should quote `"$x"` when you echo it. – Tom Fenech Oct 24 '14 at 08:20
Thank you very much. Sorry for dump way of asking. – AndriiZ Oct 24 '14 at 08:39
@TomFenech : Thanks tom for pointing it out. updated – Guru Oct 24 '14 at 08:54

score 0 · Answer 3 · answered Oct 24 '14 at 08:26

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sed -r 's/(.*)(Code )\[([0-9]+)\](.*)/code = \3/'

Output:

sdlcb@ubuntu:~/AMD_C$ echo "<timestamp> INFO   [Response--22] Code [00000000] Code was sent to [+0000002345]" | sed -r 's/(.*)(Code )\[([0-9]+)\](.*)/code = \3/'
code = 00000000

answered Oct 24 '14 at 08:26

Arjun Mathew Dan

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score 0 · Answer 4 · answered Oct 24 '14 at 17:34

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x='<timestamp> INFO   [Response--22] Code [00000000] Code was sent to [+0000002345]'
read -a fields <<<"$x"
code=${fields[4]//[][]/}
echo "code=$code"

answered Oct 24 '14 at 17:34

pjh

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Take part of the string using bash

4 Answers4