如何从 bash 脚本发送 control+c？
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How to send control+c from a bash script?
提问by ghickman
I'm starting a number of screens in a bash script, then running django's runservercommand in each of them. I'd like to be able to programmatically stop them all as well, which requires me to send Control+cto runserver.
我在 bash 脚本中启动了多个屏幕，然后runserver在每个屏幕中运行 django 的命令。我也希望能够以编程方式停止它们，这需要我发送Control+c到runserver.
How can I send these keystrokes from my bash script?
如何从我的 bash 脚本发送这些击键？
回答by Matthieu Napoli
Ctrl+Csends a SIGINTsignal.
Ctrl+C发出SIGINT信号。
kill -INT <pid>sends a SIGINTsignal too:
kill -INT <pid>也发送SIGINT信号：
# Terminates the program (like Ctrl+C)
kill -INT 888
# Force kill
kill -9 888
Assuming 888is your process ID.
假设888是您的进程 ID。
Note that kill 888sends a SIGTERMsignal, which is slightly different, but will also ask for the program to stop. So if you know what you are doing (no handler bound to SIGINTin the program), a simple killis enough.
请注意，kill 888发送SIGTERM信号略有不同，但也会要求程序停止。因此，如果您知道自己在做什么（程序中没有绑定处理SIGINT程序），那么简单kill就足够了。
To get the PID of the last command launched in your script, use $!:
要获取脚本中启动的最后一个命令的 PID，请使用$!：
# Launch script in background
./my_script.sh &
# Get its PID
PID=$!
# Wait for 2 seconds
sleep 2
# Kill it
kill $PID
回答by paxdiablo
CTRL-Cgenerally sends a SIGINT signal to the process so you can simply do:
CTRL-C通常向进程发送 SIGINT 信号，因此您可以简单地执行以下操作：
kill -INT <processID>
from the command line (or a script), to affect the specific processID.
从命令行（或脚本），以影响特定的processID.
I say "generally" because, as with most of UNIX, this is near infinitely configurable. If you execute stty -a, you can see which key sequence is tied to the intrsignal. This will probably be CTRL-Cbut that key sequence may be mapped to something else entirely.
我说“一般”是因为，与大多数 UNIX 一样，这几乎是可无限配置的。如果您执行stty -a，您可以看到哪个键序列与intr信号相关联。这可能是CTRL-C但该键序列可能完全映射到其他内容。
The following script shows this in action (albeit with TERMrather than INTsince sleepdoesn't react to INTin my environment):
以下脚本显示了这一点（尽管在我的环境中没有反应，TERM而不是INT因为sleep没有反应INT）：
#!/usr/bin/env bash
sleep 3600 &
pid=$!
sleep 5
echo ===
echo PID is $pid, before kill:
ps -ef | grep -E "PPID|$pid" | sed 's/^/ /'
echo ===
( kill -TERM $pid ) 2>&1
sleep 5
echo ===
echo PID is $pid, after kill:
ps -ef | grep -E "PPID|$pid" | sed 's/^/ /'
echo ===
It basically starts an hour-log sleepprocess and grabs its process ID. It then outputs the relevant process details before killing the process.
它基本上启动一个小时日志sleep进程并获取其进程 ID。然后在杀死进程之前输出相关的进程详细信息。
After a small wait, it then checks the process table to see if the process has gone. As you can see from the output of the script, it is indeed gone:
稍等片刻后，它会检查进程表以查看进程是否已消失。从脚本的输出中可以看出，它确实消失了：
===
PID is 28380, before kill:
UID PID PPID TTY STIME COMMAND
pax 28380 24652 tty42 09:26:49 /bin/sleep
===
./qq.sh: line 12: 28380 Terminated sleep 3600
===
PID is 28380, after kill:
UID PID PPID TTY STIME COMMAND
===
回答by Muhammad Karam Shehzad
You can get the PID of a particular process like MySQL by using following commands: ps -e | pgrep mysql
您可以使用以下命令获取特定进程（如 MySQL）的 PID： ps -e | pgrep mysql
This command will give you the PID of MySQL rocess. e.g, 13954 Now, type following command on terminal. kill -9 13954 This will kill the process of MySQL.
此命令将为您提供 MySQL 进程的 PID。例如，13954 现在，在终端上输入以下命令。kill -9 13954 这将杀死 MySQL 的进程。
回答by user2176228
pgrep -f process_name > any_file_name
sed -i 's/^/kill /' any_file_name
chmod 777 any_file_name
./any_file_name
for example 'pgrep -f firefox' will grep the PID of running 'firefox' and will save this PID to a file called 'any_file_name'. 'sed' command will add the 'kill' in the beginning of the PID number in 'any_file_name' file. Third line will make 'any_file_name' file executable. Now forth line will kill the PID available in the file 'any_file_name'. Writing the above four lines in a file and executing that file can do the control-C. Working absolutely fine for me.
例如'pgrep -f firefox' 将grep 运行'firefox' 的PID 并将这个PID 保存到一个名为'any_file_name' 的文件中。'sed' 命令将在 'any_file_name' 文件中的 PID 编号的开头添加 'kill'。第三行将使 'any_file_name' 文件可执行。现在第四行将终止文件“any_file_name”中可用的 PID。将以上四行写在一个文件中并执行该文件可以做control-C。对我来说绝对没问题。
