CODEWITHSUNDEEP
pythonlinuxbashshell
Pacified
Pacified

Reputation: 175

Python will not run entire shell script?

Starting with the following code , my objective was to create a restart command for my python bot. 

result = {
    #cmds here
    prfx and 'restart':lambda _: call('./restart.sh', shell=True),
    }[cmd](_)

    room.message(result)

I have a lot of commands in this dictionary so I summarized the format.
The command calls the shell script (restart.sh) , and is supposed to kill the bot process (bot.py) , and then reference to another shell script that then starts the bot process again.

[restart.sh]

pgrep -f bot.py #  pid
pkill -9 -f bot.py # kills the matching pid

sh ./start.sh #run start.sh
exit 0

[start.sh]

python bot.py

When running the restart command , the bot process is ended and does not continue the rest of the script.
[example : Bash]

Connecting to MySQL database...
connection established.
Connection closed.
ONLINE
[chatroom] Bot: ONLINE!: [ip]
[chatroom] user: >restart: [ip]
168747
169448

It will just show the two processes and terminate.

Upvotes: 0

Views: 76

Answers (1)

Charles Duffy
Charles Duffy

Reputation: 295363

To restart yourself (that is to say, the current process), don't use call() (which I'm assuming is subprocess.call()) at all.

Instead, if this code is being run from bot.py itself (and that script is executable with a valid shebang):

os.execl(os.path.abspath(__file__), '_')

The _ is a placeholder passed as argv[0]. You could put other command-line arguments after it, if you wished.

This replaces the running instance of bot.py with a new one inheriting the exact same PID.

Upvotes: 1

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