[Help-bash] How send signals to coproc automatically?

[Peng Yu]

Hi,

The trap in the coproc can be triggered. But when I type ctrl-c to
terminate the current program. It will not be triggered. Is there a
way to let the coproc get signals from the main program? Thanks

$ cat main.sh
#!/usr/bin/env bash
# vim: set noexpandtab tabstop=2:

trap 'echo main' EXIT
coproc {
seq 3
trap 'echo mycoproc' EXIT
}
exec 3>&"${COPROC[0]}"

sleep 1
while IFS=$'\t' read -r -u 3 line
do
printf '%s\n' "$line"
done

$ ./main.sh
1
2
3
mycoproc
$ ./main.sh
^Cmain

[Chet Ramey]

Post by Peng Yu
Hi,
The trap in the coproc can be triggered. But when I type ctrl-c to
terminate the current program. It will not be triggered. Is there a
way to let the coproc get signals from the main program? Thanks

Why not just send a signal to $COPROC_PID using `kill'?

[Peng Yu]

I'd like to to make the behavior consistent whether there is coproc or not.

Post by Chet Ramey

Post by Peng Yu
Hi,
The trap in the coproc can be triggered. But when I type ctrl-c to
terminate the current program. It will not be triggered. Is there a
way to let the coproc get signals from the main program? Thanks

Why not just send a signal to $COPROC_PID using `kill'?
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates