Gawk/Dynamic-Extensions
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17 Writing Extensions for gawk
It is possible to add new functions written in C or C++ to gawk using
dynamically loaded libraries. This facility is available on systems
that support the C dlopen() and dlsym()
functions. This chapter describes how to create extensions
using code written in C or C++.
If you don’t know anything about C programming, you can safely skip this
chapter, although you may wish to review the documentation on the
extensions that come with gawk (see section The Sample Extensions in the gawk Distribution),
and the information on the gawkextlib project (see section The gawkextlib Project).
The sample extensions are automatically built and installed when
gawk is.
NOTE: When
--sandboxis specified, extensions are disabled(see section Command-Line Options).
| • Extension Intro | What is an extension. | |
| • Plugin License | A note about licensing. | |
| • Extension Mechanism Outline | An outline of how it works. | |
| • Extension API Description | A full description of the API. | |
| • Finding Extensions | How gawk finds compiled extensions.
| |
| • Extension Example | Example C code for an extension. | |
| • Extension Samples | The sample extensions that ship with
| |
| • gawkextlib | The gawkextlib project.
| |
| • Extension summary | Extension summary. | |
| • Extension Exercises | Exercises. |
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