Hello,
I can't manage to capture signals from a script which is reading from a
named pipe.
Script:
function --on-signal SIGTERM on-signal-sigterm
echo "SIGTERM captured"
end
set fifo /tmp/asd.fifo
echo "fifo reader [" %self "]"
while test ! -p $fifo
echo "$fifo is not a fifo" >&2
sleep 1
end
while true
if read --local line < $fifo
echo "line: $line" &
end
end
Test:
$ rm -f /tmp/asd.txt; and fish daemon.fish
> fifo reader [ 15853 ]
> /tmp/asd.fifo is not a fifo
> ...
$ kill -SIGTERM 15853 [in another shell]
> SIGTERM captured
> /tmp/asd.fifo is not a fifo
> ...
$ mkfifo /tmp/asd.fifo
$ kill -SIGTERM 15853 [in another shell]
> [nothing]
The bash version works, so I guess it is a fish problem:
Script:
trap "echo SIGTERM captured" SIGTERM
fifo=/tmp/asd.fifo
echo "fifo reader [" $$ "]"
while [[ ! -p $fifo ]]; do
echo "$fifo is not a fifo" >&2
sleep 1
done
while true; do
if read line < $fifo; then
echo "line: $line" &
fi
done
Test:
$ rm -f /tmp/asd.txt; and fish daemon.bash
> fifo reader [ 15853 ]
> /tmp/asd.fifo is not a fifo
> ...
$ kill -SIGTERM 15853 [in another shell]
> SIGTERM captured
> /tmp/asd.fifo is not a fifo
> ...
$ mkfifo /tmp/asd.fifo
$ kill -SIGTERM 15853 [in another shell]
> daemon.bash: line 13: /tmp/asd.fifo: Interrupted system call
> SIGTERM captured
Furthermore, I can't Ctrl+C while reading from named pipe on fish, I guess
because SIGINT is not captured too. kill -9 works.
I opened a StackOverflow question for this:
http://stackoverflow.com/questions/22461054/fish-shell-capture-signals-while-reading-from-named-pipeNobody
noticed it, so if you want you can answer it and I will be glad to
give you some points :)
--
Maurizio De Santis
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