fish-shell/tests/signals.expect

# vim: set filetype=expect:
#
# Test signal handling for interactive shells.

# Verify that sending SIGHUP to the shell, such as will happen when the tty is
# closed by the terminal, terminates the shell and the foreground command and
# any background commands run from that shell.
set pid [spawn $fish]
expect_prompt
send "sleep 130 &\r"
expect_prompt
send "sleep 131 &\r"
expect_prompt
send "sleep 132\r"
exec -- kill -HUP $pid

# Verify the spawned fish shell has exited.
catch {expect default exp_continue} output
wait

# Verify all child processes have been killed. We don't use `-p $pid` because
# if the shell has a bug the child processes might have been reparented to pid
# 1 rather than killed.
set status [catch {exec pgrep -l -f "sleep 13"} output]
if {$status == 0} {
    puts stderr "Commands spawned by the shell still running after SIGHUP"
    puts stderr $output
}