echo T.flags: test some commandline flags

awk=${awk-../a.out}

$awk >foo 2>&1
grep '[Uu]sage' foo >/dev/null || echo 'T.flags: bad usage'

$awk -f >foo 2>&1
grep 'no program' foo >/dev/null || echo 'T.flags: bad no program'

$awk -f glop/glop >foo 2>&1
grep 'can.t open' foo >/dev/null || echo 'T.flags: bad can.t open program'

$awk -fglop/glop >foo 2>&1
grep 'can.t open' foo >/dev/null || echo 'T.flags: bad can.t open program 2'

$awk -zz 'BEGIN{}' >foo 2>&1
grep 'unknown option' foo >/dev/null || echo 'T.flags: bad unknown option'

$awk -F  >foo 2>&1
grep 'no field separator' foo >/dev/null || echo 'T.flags: bad missing field separator'

$awk -F '' >foo 2>&1
grep 'field separator FS is empty' foo >/dev/null || echo 'T.flags: bad empty field separator'