export KRB5CCNAME="FILE:$ccname"
if cat "$cache" > "$ccname" 2>/dev/null; then
klist -s 2>/dev/null && kinit -R 2>/dev/null || kinit $PRINCIPAL
export KRB5CCNAME="FILE:$ccname"
if cat "$cache" > "$ccname" 2>/dev/null; then
klist -s 2>/dev/null && kinit -R 2>/dev/null || kinit $PRINCIPAL