imsg-compat

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Unofficial port of OpenBSD's imsg utilities

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# OpenBSD IMSG
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This is an unofficial port of OpenBSD's imsg interface to linux.

[![Packaging status](https://repology.org/badge/vertical-allrepos/imsg-compat.svg)](https://repology.org/project/imsg-compat/versions)

## Description

The **imsg** functions provide a simple mechanism for communication
between local processes using sockets. Each transmitted message is
guaranteed to be presented to the receiving program whole.<br>
They are commonly used in privilege separated processes, where
processes with different rights are required to cooperate.

## Installation

The port has been tested to compile and install with GCC 9.3.0 and
Clang 11.0.0, with GNU Make.

```
make
make test
make install
man imsg_init
```

PS: This port requires *<sys/queue.h>* and if using glibc, then >=2.25.0,
for the `explicit_bzero` function.

## Usage

This port creates both a shared library `libimsg.so` and a static library
`libimsg.a`. To use them, just link with `-limsg`.

## Modifications

This port is as faithful as possible to the OpenBSD implementation.<br>
The only addition is the [src/_imsg_compat.h](src/_imsg_compat.h) header
file which defines static standalone implementations of compat functions.

## Credits

The port has been made possible due to the excellent works of the tmux
team and of course OpenBSD for creating it.

## References

- https://man.openbsd.org/imsg_init.3

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