read6.sub

来自「android-w.song.android.widget」· SUB 代码 · 共 11 行

# test read with a timeout of 0 -- input polling
# sleep with fractional seconds argument is not universal
echo abcde | { sleep 0.25 2>/dev/null ; read -t 0; }
echo $?

read -t 0 < $0
echo $?

read -t 0
echo $?