Solved

bash parse output to variable

Posted on 2014-03-04
9
717 Views
Last Modified: 2014-03-04
I am a C++ programmer and little knowledge of bash ;)

I have $output string in format

Command line asked for 29 of 639 tests
Of those: 0 Skipped, 5 Failed, 0 Warned, 24 Passed

I wanted to extract the integer before Failed and assign it to bash variable (in this case 5)
How do i do this in bash script. I want to make sure the value is "0" which means no test failed
0
Comment
Question by:perlperl
  • 5
  • 4
9 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 39904767
output='Command line asked for 29 of 639 tests
Of those: 0 Skipped, 5 Failed, 0 Warned, 24 Passed'
F=${output%Failed*}
echo ${F##*,}
0
 
LVL 84

Accepted Solution

by:
ozo earned 500 total points
ID: 39904782
Of just to check:
[[ $output =~ ", 0 Failed" ]] && echo "No test failed"
0
 

Author Comment

by:perlperl
ID: 39904786
Thats a crazy syntax, I would have never figured out this. Can you please provide me the link if you have one

so I am using this now

F=${output%Failed*}
        if [${F##*,} -ne 0 ]; then
                echo "Failed Num of errors = ${F##*,}"
        fi
0
Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

 
LVL 84

Expert Comment

by:ozo
ID: 39904797
see the Parameter Expansion section of
man bash
0
 

Author Comment

by:perlperl
ID: 39904798
The second one sounds much easier ;)
0
 

Author Comment

by:perlperl
ID: 39904816
Is there something called !~

I wanna do and operation

 output='Command line asked for 29 of 639 tests
Of those: 0 Skipped, 5 Failed, 0 Warned, 24 Passed'

 if [ $? -ne 0 ] || [$output !~ ", 0 Failed"]; then
   echo "Failed"
fi
0
 

Author Comment

by:perlperl
ID: 39904835
somehow this does not work

 if [ $? -ne 0 ] || ! [$output =~ ", 0 Failed"]; then
   echo "Failed"
fi
0
 

Author Comment

by:perlperl
ID: 39904844
This worked. i hate bash scripting

 if [ $? -ne 0 ] || [[ ! "$output" =~ ", 0 Failed" ]]; then

so particular about spaces.  crazy syntax
0
 
LVL 84

Expert Comment

by:ozo
ID: 39904850
[[ syntax is slightly different from [ syntax.  In particular, [ does not have the =~ operator
0

Featured Post

Use Case: Protecting a Hybrid Cloud Infrastructure

Microsoft Azure is rapidly becoming the norm in dynamic IT environments. This document describes the challenges that organizations face when protecting data in a hybrid cloud IT environment and presents a use case to demonstrate how Acronis Backup protects all data.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction We as admins face situation where we need to redirect websites to another. This may be required as a part of an upgrade keeping the old URL but website should be served from new URL. This document would brief you on different ways ca…
Why Shell Scripting? Shell scripting is a powerful method of accessing UNIX systems and it is very flexible. Shell scripts are required when we want to execute a sequence of commands in Unix flavored operating systems. “Shell” is the command line i…
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
Connecting to an Amazon Linux EC2 Instance from Windows Using PuTTY.

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question