如何在shell脚本退出时终止后台进程/作业？

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trap "echo hello" SIGINT

trap "killall background" EXIT

trap 'kill $(jobs -p)' EXIT

trap 'while kill %% 2>/dev/null; do jobs > /dev/null; done' INT TERM EXIT [...]

trap "exit" INT TERM
trap "kill 0" EXIT

#!/bin/bash
# killable-shell.sh: Kills itself and all children (the whole process group) when killed.
# Adapted from http://stackoverflow.com/a/2173421 and http://veithen.github.io/2014/11/16/sigterm-propagation.html
# Note: Does not work (and cannot work) when the shell itself is killed with SIGKILL, for then the trap is not triggered.
trap "trap - SIGTERM && echo 'Caught SIGTERM, sending SIGTERM to process group' && kill -- -$$" SIGINT SIGTERM EXIT
echo $@
PID=$!
wait $PID
trap - SIGINT SIGTERM EXIT
wait $PID

$ bash killable-shell.sh sleep 100
sleep 100
[1]  + 31568 suspended  bash killable-shell.sh sleep 100
$ ps aux | grep "sleep"
niklas   31568  0.0  0.0  19640  1440 pts/18   T    01:30   0:00 bash killable-shell.sh sleep 100
niklas   31569  0.0  0.0  14404   616 pts/18   T    01:30   0:00 sleep 100
niklas   31605  0.0  0.0  18956   936 pts/18   S+   01:30   0:00 grep --color=auto sleep
[1]  + 31568 continued  bash killable-shell.sh sleep 100
$ kill 31568
Caught SIGTERM, sending SIGTERM to process group
[1]  + 31568 terminated  bash killable-shell.sh sleep 100
$ ps aux | grep "sleep"
niklas   31717  0.0  0.0  18956   936 pts/18   S+   01:31   0:00 grep --color=auto sleep

KillJobs() {
    for job in $(jobs -p); do
            kill -s SIGTERM $job > /dev/null 2>&1 || (sleep 10 && kill -9 $job > /dev/null 2>&1 &)
TrapQuit() {
    # Whatever you need to clean here
    KillJobs
trap TrapQuit EXIT

function cleanup_func {
    sleep 0.5
    echo cleanup

如何在shell脚本退出时终止后台进程/作业？

9 个回答