Can't capture regex group?

Question

I have Bash script below, trying to capture last digits of 'pingnet' but can not get a match. I verified in regex101 and my regex is correct:

pingnet="pingcount,site=DC,cur=200 total-up=988"
regex='(\d+)$'
if [[ $pingnet =~ $regex ]]
then
    echo "YES"
    echo "${BASH_REMATCH[1]}"
else
    echo "NOT"
    echo "${BASH_REMATCH[1]}"
fi

The result of running script is NOT.

Maybe this will help: bash ERE regular expressions do not have the \d as explained in Bash =~ regex and https://regex101.com/ — , Jul 19 '18 at 20:32

score 4 · Accepted Answer · answered Jul 19 '18 at 20:27

4

Bash's regex syntax does not recognize \d; use [[:digit:]] instead:

pingnet="pingcount,site=DC,cur=200 total-up=988"
regex='([[:digit:]]+)$'

answered Jul 19 '18 at 20:27

Jeff Schaller

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Can't capture regex group?

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