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awk find which column contains string

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# 1  
Old 09-04-2016
awk find which column contains string
i want to search columns in a variable and any column contains a particular string, i want to print the value of that column

Code:
[skys ~]$ echo "${USEDMEMORY}"
memTotalReal=3925908 memAvailReal=1109812 memBuffer=242676 memCached=641628
[skys ~]$ 
[skys ~]$ echo "${USEDMEMORY}" | awk '/memAvailReal/'

so what im trying to do here is, find the column that contains the string "memAvailReal", then, output the value of "memAvailReal", so the desired output should be:

Code:
1109812

i dont want to hardcode a specific column number to grab because these strings may be in different columns.
# 2  
Old 09-04-2016
Hello SkySmart,

Could you please try following and let me know if this helps.
Code:
echo "memTotalReal=3925908 memAvailReal=1109812 memBuffer=242676 memCached=641628" |  awk '{match($0,/memAvailReal=[0-9]+/);A=substr($0,RSTART,RLENGTH);sub(/.*=/,X,A);print A}'

Output will be as follows.
Code:
1109812

EDIT: Adding one more solution on same too.
Code:
echo "memTotalReal=3925908 memAvailReal=1109812 memBuffer=242676 memCached=641628" |  awk '{sub(/.*memAvailReal=/,X,$0);sub(/ .*/,X,$0);print}'

Thanks,
R. Singh
Last edited by RavinderSingh13; 09-04-2016 at 01:10 PM.. Reason: Adding one more solution successfully too now.
This User Gave Thanks to RavinderSingh13 For This Post:
SkySmart
# 3  
Old 09-04-2016
Quote:
Originally Posted by RavinderSingh13
Hello SkySmart,

Could you please try following and let me know if this helps.
Code:
echo "memTotalReal=3925908 memAvailReal=1109812 memBuffer=242676 memCached=641628" |  awk '{match($0,/memAvailReal=[0-9]+/);A=substr($0,RSTART,RLENGTH);sub(/.*=/,X,A);print A}'

Output will be as follows.
Code:
1109812

EDIT: Adding one more solution on same too.
Code:
echo "memTotalReal=3925908 memAvailReal=1109812 memBuffer=242676 memCached=641628" |  awk '{sub(/.*memAvailReal=/,X,$0);sub(/ .*/,X,$0);print}'

Thanks,
R. Singh
thank you so much! this works perfectly

anyway to get rid of the echo? and have one command do it all? something like this:

Code:
awk -v USEDMEMORY="${USEDMEMORY}"  '{sub(/.*memAvailReal=/,X,$0);sub(/ .*/,X,$0);print}'

# 4  
Old 09-04-2016
Quote:
Originally Posted by SkySmart
thank you so much! this works perfectly
anyway to get rid of the echo? and have one command do it all? something like this:
Code:
awk -v USEDMEMORY="${USEDMEMORY}"  '{sub(/.*memAvailReal=/,X,$0);sub(/ .*/,X,$0);print}'

Hello SkySmart,

Could you please try following and let me know if this helps you(haven't tested though,but it should work).
Code:
VAL="memTotalReal=3925908 memAvailReal=1109812 memBuffer=242676 memCached=641628" 
awk -vval="$VAL"  'BEGIN{sub(/.*memAvailReal=/,X,val);sub(/ .*/,X,val);print val}'

Thanks,
R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
SkySmart
# 5  
Old 09-04-2016
Quote:
Originally Posted by RavinderSingh13
Hello SkySmart,

Could you please try following and let me know if this helps you(haven't tested though,but it should work).
Code:
VAL="memTotalReal=3925908 memAvailReal=1109812 memBuffer=242676 memCached=641628" 
awk -vval="$VAL"  'BEGIN{sub(/.*memAvailReal=/,X,val);sub(/ .*/,X,val);print val}'

Thanks,
R. Singh
thank you! it works.
# 6  
Old 09-04-2016
Non-AWK solution.

Code:
# in the middle
$ echo "memTotalReal=3925908 memAvailReal=1109812 memBuffer=242676 memCached=641628" | sed '/^.*memAvailReal=/ s///;s/ .*$//'
1109812
# at the start
$ echo "memAvailReal=1109822 memTotalReal=3925908 memBuffer=242676 memCached=641628" | sed '/^.*memAvailReal=/ s///;s/ .*$//'
1109822
# at the end
$ echo "memTotalReal=3925908 memBuffer=242676 memCached=641628 memAvailReal=1109842 " | sed '/^.*memAvailReal=/ s///;s/ .*$//'
1109842

As you can see it works wherever the required parameter is in the line. I am making the assumption that you would pipe the output of the process generating the line directly into the above sed command.

Andrew
This User Gave Thanks to apmcd47 For This Post:
SkySmart
# 7  
Old 09-05-2016
With a recent shell:
Code:
TMP=${USEDMEMORY#*memAvailReal=}
echo ${TMP%% *}
1109812

This User Gave Thanks to RudiC For This Post:
SkySmart
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