I have some PHP files. Each of them start a socket listener, or run an infinite loop. The scripts halt when are executed via php command:
php sock_listener.php ...halt there
php listener2.php ... halt there
...
Currently I use screen command to start all the listener PHP files every time the machine is rebooted. Is there a way I can start all the listener PHP files in single shell line so that I can write a shell script to make it easier to use?
Create a detached screen session for the first script:
session='php-test'
screen -S "$session" -d -m -t A php a.php
where -d -m combination causes screen to create a detached session.
Run the rest of the scripts in the same session in separate windows:
screen -S "$session" -X screen -t B php b.php
screen -S "$session" -X screen -t C php c.php
where
-X sends the built-in screen command to the running session;-t sets the window title.The session will be available in the output of screen -ls command:
There is a screen on:
8951.php-test (Detached)
Connect to the session using -r option, e.g.:
screen -r 8951.php-test
List the windows within the screen session with Ctrl-a " shortcut, or windowlist -b command.
A less convenient way is to send the commands to background by appending an ampersand at the end of each command:
nohup php a.php 2>a.php.err >a.php.out &
nohup php b.php 2>b.php.err >b.php.out &
nohup php c.php 2>c.php.err >c.php.out &
where
nohup prevents termination of the commands, if the user logs out of the shell. Read this tutorial for more information;2>a.php.err redirects the standard error to a.php.err file;>a.php.out redirects the standard output to a.php.out file.Is there a way I can start all the listener PHP files in single shell line so that I can write a shell script to make it easier to use?
You can put the above-mentioned commands into a shell script file, e.g.:
#!/bin/bash -
# Put the commands here
make it executable:
chmod +x /path/to/script
and call it when you need it:
/path/to/script
Modify the shebang as appropriate.
screen commands). When you launch it: ./script.sh, it doesn't forward you to the screen session, since it is detached.#!/usr/bin/bash nohup php myfile1.php 2>path/myfile1.err >myfile1.out & nohup php myfile2.php 2>path/myfile2.err >myfile2.out `` echo "Startup done." exit By the way, if the sh is edited in vi, I have to set ff=unix. Besides that, I have no idea about the '&' symbol in the .sh. When should I attach it to the end of the line. Anyway, Thank you very much @Ruslan Osmanov. You helped me a lot.Just run them under circus. Circus will let you define a number of processes and how many instances you want to run, and just keep them running. https://circus.readthedocs.io/en/latest/
execcommand