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content/blog/bashprocesses.md

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+---
+title: "Handling Background Processes in Bash"
+date: 2019-06-17T19:50:30-04:00
+draft: false
+---
+
+For multi-process applications, I want to be able to start it up using the `bash` command processor and be able to stop all the processes just by hitting `CTRL-C`.
+
+As a quick reminder, to have a task run in the background you need to add a `&` at the end of the line.
+
+```bash
+execute_app &
+```
+
+Previously, I was grabbing the PID of this background process, trapping the interrupt signal and taking the time to send the interrupt signal to all of the background processes.
+
+You can get the child pid by referencing the variable `$!` after sending a process to the background.
+
+Now I just use `setsid` to set the process group of the background processes to be the same as the bash process itself.  The following demo script here will show the capability.
+
+```bash
+#!/bin/bash
+setsid sleep 5 &
+setsid sleep 10 &
+wait
+```
+
+This script will send two processes to the background and will wait until all the processes are finished. Hitting `CTRL-C` during execution will send the interrupt signal to all of the processes achieving my goal.