Take part of the string using bash [duplicate]

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 "<timestamp> INFO [Response--22] Code [00000000] Code was sent to [+0000002345]" — AndriiZ
– AndriiZ, Commented Oct 24, 2014 at 8:12
You should edit your question to include the expected output. — Tom Fenech
– Tom Fenech, Commented Oct 24, 2014 at 8:19
@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
– tripleee, Commented Oct 24, 2014 at 8:31

Tom Fenech · Accepted Answer · 2014-10-24 08:18:17Z

0

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).

answered Oct 24, 2014 at 8:18

Tom Fenech

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Arjun Mathew Dan · Accepted Answer · 2014-10-24 08:26:32Z

0

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, 2014 at 8:26

Arjun Mathew Dan

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Guru · Accepted Answer · 2014-10-24 08:54:14Z

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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, 2014 at 8:54

answered Oct 24, 2014 at 8:19

Guru

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3 Comments

Tom Fenech Over a year ago

You should quote "$x" when you echo it.

AndriiZ Over a year ago

Thank you very much. Sorry for dump way of asking.

Guru Over a year ago

@TomFenech : Thanks tom for pointing it out. updated

pjh · Accepted Answer · 2014-10-24 17:34:47Z

0

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, 2014 at 17:34

pjh

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