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Learning Linux Shell Scripting

You're reading from   Learning Linux Shell Scripting Leverage the power of shell scripts to solve real-world problems

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Product type Paperback
Published in May 2018
Publisher Packt
ISBN-13 9781788993197
Length 332 pages
Edition 2nd Edition
Languages
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Author (1):
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Ganesh Sanjiv Naik Ganesh Sanjiv Naik
Author Profile Icon Ganesh Sanjiv Naik
Ganesh Sanjiv Naik
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Table of Contents (17) Chapters Close

Preface 1. Getting Started and Working with Shell Scripting FREE CHAPTER 2. Drilling Deep into Process Management, Job Control, and Automation 3. Using Text Processing and Filters in Your Scripts 4. Working with Commands 5. Exploring Expressions and Variables 6. Neat Tricks with Shell Scripting 7. Performing Arithmetic Operations in Shell Scripts 8. Automating Decision-Making in Scripts 9. Automating Repetitive Tasks 10. Working with Functions 11. Using Advanced Functionality in Scripts 12. System Startup and Customizing a Linux System 13. Pattern Matching and Regular Expressions with sed and awk 14. Taking Backup and Embedding Other Languages in Shell Scripts 15. Database Administration Using Shell Scripts 16. Other Books You May Enjoy

Embedding other language codes or scripts in Bash shell scripts

There is a way to embed other language scripts or code in Bash Script. In this section, you will learn about it.

Embedding other language code in Bash shell script

We may need to include other language scripts in Bash for certain reasons such as the fact that a certain complex task is already coded in another language. For example, storing the values for pi; other languages could be better at getting the precise value of pi due to their library functions. Let us assume that the user knows Lua language scripting. Then, embedding Lua language script in Bash would be undertaken as follows:

    $ export PI=$(lua -e "print(string.format('%f', math.pi...
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