evan176/shell-utility

shell-utility

Some small tools for shell.

1. Locker
2. WFC (Workflow controller)

Installation

Use "dot" to include utility.sh in your custom script.

. utility.sh

Usage

Locker

Use locker to avoid cronjob conflict. See example:

test.sh:

#!/bin/bash
lock_it
echo "Start testing"
sleep 1h
echo "End testing"
unlock_it

Result:

$ bash test.sh
Successfully lock: test.sh.lock
$ bash test.sh
Previous process exists! can't acquire lock!

WFC

This tool provides convenient to control workflow for bash. While we want to execute some dependent jobs, we need some mechanism to check result of each jobs. Like:

$command1
if [ "$?" -ne 0  ]; then # Check result of command1
    ...
    $command2
fi

It shows a lot of redundant scope in code. We can save this duplicated script by simple function likes below. It also automatically records all execution results into log.

Revised version with wfc tool:

wfc "$command1"
wfc "$command2" # If it gets an incorrect result in command1, then command2 will not be executed.

License

BSD License