CODEWITHSUNDEEP
linuxshell
user2074481
user2074481

Reputation: 59

how can read more than one value in variable with shell script

Read more than one value in variable space seprated

I have a variable that stores output of command. Sometimes output of command is single word and sometimes output command is having multiple words with space separated

Example

MAC=  00:1c:c4:5b:6e:fe 00:1c:c4:5b:6e:fe 00:1c:c4:5b:6e:fe 00:1c:c4:5b:6e:fe
echo $MAC

I want to use if statement like below

if $mac has more than one word then echo not ok else echo ok

Thanks in advance

Upvotes: 0

Views: 771

Answers (3)

devnull
devnull

Reputation: 123448

Try:

if [[ "$MAC" =~ "\s" ]]; then echo not ok; else echo ok; fi

The following would yield the string before the first occurrence of (whitespace):

address=${MAC%% *}

Upvotes: 1

HexAndBugs
HexAndBugs

Reputation: 5789

If you want to simply determine if there are spaces in $MAC, you can do:

case $MAC in  
     *\ * )
           echo "not ok"
          ;;
       *)
           echo "ok"
           ;;
esac

Upvotes: 1

Kent
Kent

Reputation: 195029

you should not have the space after the MAC=.

try

awk '{print (NF>1?"not ":"")"ok"}'  <<<$MAC

e.g.

kent$  MAC="00:1c:c4:5b:6e:fe 00:1c:c4:5b:6e:fe 00:1c:c4:5b:6e:fe 00:1c:c4:5b:6e:fe"

kent$  awk '{print (NF>1?"not ":"")"ok"}' <<<$MAC                                   
not ok

Upvotes: 1

Related Questions