Script output formatting

Question

I am having a script output data that needs to be formatted, I have a output like below.

UNIT : ABC
xxxx
xxxx
Free memory : xxx 70

UNIT : DEF
xxxx
xxxx
Free memory : xxx 60

I need to capture free memory data for individual units but I am unable to print that out, any suggestions ? There are some 25 units & I have to print free memories of all of them individually.

Here "xxxxx" is some random data which is irrelevant for me, what I want is to print free memory for each unit, something like below format :slight_smile

ABC 70
DEF 60

and so on.

Can you show your script? And can it be changed or this has to be done after the script execution? — samthegolden
– samthegolden, Commented Jul 8, 2020 at 15:10
It would be easier to extract this from whatever data the script is formatting, or at least have the script provide a more machine-parseable output format as an option. — chepner
– chepner, Commented Jul 8, 2020 at 15:15
This has to be done after script execution, the problem here is UNIT & FREE MEMORY for that unit are not in same line so formatting is bit difficult. — Vish
– Vish, Commented Jul 8, 2020 at 16:10

Jithin Scaria · Accepted Answer · 2020-07-08 17:51:12Z

1

Let the file output.txt contains the output,

Then Assuming, the order of UNIT and Free memory doesn't change in the output, we could try the following.

cat output.txt | grep -Ea 'UNIT|Free memory' | sed -e ':a;N;s/\nFree/ Free/g' | awk '{print $3" "$8}'

Output:

ABC 70
DEF 60

Explanation:

grep -Ea 'UNIT|Free memory' : This will grep out only the lines contains either UNIT or Free memory.
sed -e ':a;N;s/\nFree/ Free/g' : This will loop through each line, and wherever new line starts with Free, the new line will replace with a space. Hence we will get UNIT and Free memory in a single line.
awk '{print $3" "$8}' : This further cut out the positions of UNIT name and Free memory value.

Hope it helps.

answered Jul 8, 2020 at 17:51

Jithin Scaria

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M. Nejat Aydin · Accepted Answer · 2020-07-09 08:35:05Z

0

Using GNU sed

/path/to/your/script |
sed -n -E '/^UNIT\s*:\s*/{s///;h}; /^Free memory\s*:.*\s([0-9]+)$/{s//\1/;H;g;s/\n/ /p}'

answered Jul 9, 2020 at 8:35

M. Nejat Aydin

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Jetchisel · Accepted Answer · 2020-07-10 01:14:01Z

0

With GNU ed

If it is a file.

ed -s file.txt < script.ed

If the output is coming from a script, requires a shell that supports <() Process Substitution.

ed -s <(cat file.txt) < script.ed

Replace the cat part with the output/command from your script.

The script.ed script.

v/^UNIT\|^Free/d
,s/.*[[:space:]]\(.*\)$/\1/g
,s/$/ /
g/./j
,s/ $//
,p
Q

edited Jul 10, 2020 at 1:14

answered Jul 9, 2020 at 11:16

Jetchisel

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LeadingEdger · Accepted Answer · 2020-07-10 19:25:17Z

0

Just send your script's output into this awk command:

Your_Script | awk '
/^UNIT/ {printf $NF" "}
/^Free memory/ {print $NF}
'

answered Jul 10, 2020 at 19:25

LeadingEdger

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