Shell Programming and Scripting

SEARCH_CRITERIA="REJECT, DUPLICATE"

echo "$SEARCH_CRITERIA" | IFS=, read r d

awk -v R="$r" -v D="$d" '$0 ~ /^R/ || $0 ~ /^D/' file

awk -v sc=REJECT,DUPLICATE 'BEGIN{n=split(sc,a,/,/)}
{p=0;for(i=1;i<=n;i++) if(index($0,a[i])) {p=1;break}}p' infile

SEARCH_CRITERIA="REJECT,DUPLICATE"

echo "$SEARCH_CRITERIA" | awk -F, ' {
        for(i=1;i<=NF;i++)
                a[$i];
        } {
        while((getline line < "filename")>0) {
                split(line,L,",");
                if(L[1] in a)
                        print line;
        }
        close("filename");
}'