1# Most shells print a message when a foreground job is killed by a signal. 2# POSIX allows this, provided the message is sent to stderr, not stdout. 3# Some trickery is needed to capture the message as redirecting stderr of 4# the command itself does not affect it. The colon command ensures that 5# the subshell forks for ${SH}. 6 7exec 3>&1 8r=`(${SH} -c 'kill $$'; :) 2>&1 >&3` 9[ -n "$r" ] 10