Hello,
with ksh93t+ the trap actions in the following script leads to a
termination of the script:
----8<----
read_timeout () {
trap 'printf "timed out\n"; trap - TERM; return' TERM
( sleep $1; kill -TERM $$ ) >/dev/null 2>&1 &
timer_pid=$!
read $2
kill $timer_pid 2>/dev/null
}
read_timeout 5 value
printf "read \"%s\"\n" "${value:-default}"
---->8----
Why is that? I would expect the trap to be evaluated in the
context of the read_timeout function equivalent to an
"eval 'printf "timed out\n"; return'" inside the function and
bash, pdksh and dash/ash do that.
(I know both about read -t, but I'm trying to build something
equivalent using only SUSv3 specified functionality.)
--
Guido Berhoerster
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