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Lua bindings for POSIX APIs
C Shell Lua Makefile

This branch is 62 commits behind luaposix:master

signal: workaround a printf long vs int type coercion issue.

* ext/posix/signal.c (sig_handle): Some architectures use a long
for sig_atomic_t, so we need a %ld specifier to display it without
a warning.  In case sig_atomic_t is narrower than a long, cast it
up before passing to fprintf.

Signed-off-by: Gary V. Vaughan <>
latest commit 9e8857930a
@gvvaughan gvvaughan authored
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By the luaposix project

travis-ci status Stories in Ready

luaposix is a POSIX binding, including curses, for Lua 5.1, 5.2 and 5.3; like most libraries it simply binds to C APIs on the underlying system, so it won't work on non-POSIX systems. However, it does try to detect the level of POSIX conformance of the underlying system and bind only available APIs.

luaposix is released under the MIT license, like Lua (see COPYING; it's basically the same as the BSD license). There is no warranty.

Please report bugs and make suggestions by opening an issue on the github tracker.


The simplest way to install luaposix is with LuaRocks. To install the latest release (recommended):

luarocks install luaposix

To install current git master (for testing):

luarocks install

To install without LuaRocks, check out the sources from the repository and run the following commands:

cd luaposix
make all check install

Dependencies are listed in the dependencies entry of the file rockspec.conf. You will also need Autoconf and Automake.

See INSTALL for configure instructions and configure --help for details of available command-line switches.


The library is split into submodules according to the POSIX header file API declarations.

HTML documentation can be generated with LDoc by running make doc or viewed online at

The authoritative online POSIX reference is at

Example code

See the example program tree.lua, along with the many small examples in the generated documentation and BDD specs/*_spec.yaml.

For a complete application, see the GNU Zile.

Bugs reports & patches

Bug reports and patches are most welcome. Please use the github issue tracker (see URL at top). There is no strict coding style, but please bear in mind the following points when writing new code:

  1. Follow existing code. There are a lot of useful patterns and avoided traps there.

  2. 8-character indentation using TABs in C sources; 2-character indentation using SPACEs in Lua sources.

  3. No non-POSIX APIs; no platform-specific code. When wrapping APIs introduced in POSIX 2001 or later, add an appropriate #if. If your platform isn't quite POSIX, you may find a gnulib module to bridge the gap. If absolutely necessary, use autoconf feature tests.

  4. Thin wrappers: although some existing code contradicts this, wrap POSIX APIs in the simplest way possible. If necessary, more convenient wrappers can be added in Lua (posix.lua).

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