CODEWITHSUNDEEP
linuxbashshellunix
Adi
Adi

Reputation: 123

store command output to array in shell script

I'm using ssh to connect to a remote machine and read a log file there. From that log file, based on some tokens, I extract specific logs and store it in a variable. Every log is in new line in the log file and the data can contain any character including white space. 

array=("$(egrep "UserComments/propagateBundle-2013-10-19--04:42:13|UserComments/propagateBundle-2013-10-19--04:38:36|UserComments/propagateBundle-2013-10-19--04:34:24" <path>/propagateBundle.log)")
echo ${array[0]}
echo "$array"

First echo prints complete output in one line separated by white space while the other prints outputs in new line. Problem, is, I'm not able to save this output as an array. I tried this:

newArray=("$array")
max=${#newArray[@]}
echo $max

But echoing 'max' yields '1' on the screen. How can I save the output in an array? I also tried using 

IFS=\`\n`

but could not get the data in an array.

EDIT

I used the solution given by Anubhav and it worked like charm. Now I faced a second issue. Since my data contains white spaces, so the array broke at white spaces and wrongly contained the one comments as multiple arrays. So, I used 

IFS=\`\n`

and also used a $ symbol before backticks. Although this solves my problem, I still get an exception in the logs: 

test.sh: line 11: n: command not found

Any suggestions?

Upvotes: 4

Views: 9742

Answers (2)

MFO
MFO

Reputation: 1

I've used IFS=('\n') otherwise all "n" chars disappears from results and sort command doesn't work properly. See bellow, it is a customized llq output.

#!/bin/bash
IFS=('\n')
raw=(`llq -f %id %o %gu %gl %st %BS %c`)
echo
echo ${raw[*]} | grep "step(s)"
echo
echo ${raw[*]} | grep "Step"
echo ${raw[*]} | grep "\---*"
echo ${raw[*]} | grep "bgp-fn*" | sort -k5 -r
echo ${raw[*]} | grep "\---*"
echo ${raw[*]} | grep "Step"
echo
echo ${raw[*]} | grep "step(s)"
echo

Upvotes: 0

anubhava
anubhava

Reputation: 784938

Don't put quotes in the command substitution:

array=( $(egrep "UserComments/propagateBundle-2013-10-19--04:42:13|UserComments/propagateBundle-2013-10-19--04:38:36|UserComments/propagateBundle-2013-10-19--04:34:24" <path>/propagateBundle.log) )

With quotes as in your code whole output is treated as single string in the array.

Upvotes: 2

Related Questions