On Fri, Nov 25, 2016 at 7:05 AM, L A Walsh <b...@tlinx.org> wrote: > > > isabella parakiss wrote: > >> that's not true https://gist.github.com/fa4efd90376ff2714901e4429fdee734 >> read successfully reads the data, but then it's discarded by bash >> >> > ---- > It's discarded by bash because the read doesn't read 10 > characters within the time limit. If you use -N 5, you get > your output. "-t" says it will timeout and return failure if a > specified number of characters is not read within timeout period. >
The manual for -t says: If read times out, read saves any partial input read into the specified variable *name*. -clark If timeout is exceeded, then return status is > 128: > > bash -c '( printf 12345; sleep 2 ) | ( read -t 1 -N 10 v; echo "s=$?, > <$v>" )' > s=142, <> > > (status is > 128) > > >> >
