Searching for pattern in variable using case statements

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07-25-2016

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Old Bourne shells do not like ( ) in a case selector, and no -r for read.

Code:

#!/bin/sh
COUNTPRO2="gine is very bad
vine is pretty good"

while IFS= read factor
do
    case "$factor" in
    *vine*)
        printf '%s\n' "$factor"
    ;;
    esac
done <<EOF
$COUNTPRO2
EOF

A here-document uses a /tmp file. Another method is a pipe to the while loop

Code:

#!/bin/sh
COUNTPRO2="gine is very bad
vine is pretty good"

printf '%s\n' "$COUNTPRO2" |
while IFS= read factor
do
    case "$factor" in
    *vine*)
        printf '%s\n' "$factor"
    ;;
    esac
done

Last edited by MadeInGermany; 07-25-2016 at 01:19 PM.. Reason: printf

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