仅当程序拒绝以软方式终止时，如何通过硬方式终止程序？

Question

如何通过 bash 以软方式退出程序，如果不成功，则以硬方式退出程序。

知道如何通过bash打开程序以及如何获取程序的PID。以下示例打开编辑器 XED：

固定 & PID=$!
已知如何回显打开的程序的 PID：

回显 $PID

12345 # PID 的示例输出
已知如何尝试以软方式关闭程序以及如何通过 PID select 程序：

kill -15 $PID # select一个程序通过PID和托盘以软方式杀死它
已知如何以硬方式关闭程序以及如何通过 PID select 程序：

kill -9 $PID # select一个程序通过PID硬杀

把我所有的东西放在一起，还缺少一些东西：

xed & PID=$! # open the program xed and get the pid
echo PID of programm: $PID

sleep 5 # lets run the xed 5 seconds

kill -15 $PID # select the xed by PID and try to kill it on soft way

# check based on variant 1, 2, 3 or other, the xed was sucessfull killed on soft way or not
# if the xed still running, kill it on follow way

kill -9 $PID # select the xed by PID and kill it on hard way

Answer 1

#!/bin/bash

xed & PID=$! # Start XED and get PID

sleep 3

# kill -15 $PID # Soft Kill, activate or deactivate for testing
echo
echo

sleep 3

if ps -p $PID
then
    echo "The PID/program didn't be killed successful by Soft Kill"
    kill -9 $PID # Hard Kill
else
    echo "PID/program are already closed by Soft Kill"

fi
echo
echo

Answer 2

您仍然可以通过以下方式运行获取有关进程的信息：

xed & xedPid=$! # Start of editor XED and asking for PID
[1] 12345
kill -15 $PID


# getting the follow, if the XED was killed successfull soft before:
kill -15 $PID
bash: kill: (12345) - Kein passender Prozess gefunden
**[1]+  Beendet                 xed**

Answer 3

您可以获取有关进程的信息是否仍然运行，也可以遵循以下方式：

xed & xedPid=$! # Start of editor XED and asking for PID
[1] 12345

# Output if xed are running
kill -0 $PID
kill: Aufruf: kill [-s Signalname | -n Signalnummer | -Signalname] pid | jobspec ... oder kill -l [Signalname]

kill -15 $PID

# Output if XED are not more running:
kill -0 $PID
kill: Aufruf: kill [-s Signalname | -n Signalnummer | -Signalname] pid | jobspec ... oder kill -l [Signalname]
**[1]+  Beendet                 xed**

Answer 4

kill -15 $PID 睡觉 1

if ps -p $PID > /dev/null 然后杀死-9 $PID 菲

Answer 5

基于 Eddy763 的一个答案，遵循逻辑上更合适的变体：

xed & PID=$! # Start XED and get PID

sleep 2

# kill -15 $PID # Soft Kill, activate or deactivate for testing
echo
echo

sleep 2

if ! ps -p $PID
then
    echo "The PID/program are closed successful by Soft Kill"

else
    echo "The PID/program didn't be killed successful by Soft Kill active, so it will be killed now on hard way"
    kill -9 $PID # Hard Kill

fi
echo
echo

仅当程序拒绝以软方式终止时，如何通过硬方式终止程序？

How to kill a program by the hard way, only if it refuses to terminate the soft way?

linux

bash

signals