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#!/bin/bash
# match-string.sh: Simple string matching
# using a 'case' construct.
match_string ()
{ # Exact string match.
MATCH=0
E_NOMATCH=90
PARAMS=2 # Function requires 2 arguments.
E_BAD_PARAMS=91
[ $# -eq $PARAMS ] || return $E_BAD_PARAMS
case "$1" in
"$2") return $MATCH;;
* ) return $E_NOMATCH;;
esac
}
a=one
b=two
c=three
d=two
match_string $a # wrong number of parameters
echo $? # 91
match_string $a $b # no match
echo $? # 90
match_string $b $d # match
echo $? # 0
exit 0
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