einhyrningsins(1) -- graceful restarts for socket-based daemons
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## SYNOPSIS

`einhyrningsins` [OPTIONS] -- PROGRAM [PROGRAM_ARGS]

## DESCRIPTION

This is a socket multiplexer featuring graceful restarts. It runs multiple
copies of the child program that are passed a shared socket (or more than one)
to bind to and accept connections from. Graceful rolling restarts enable
updates of the child program with zero downtime and no dropped connections.

This program requires special support in the child program to achive the
graceful restarts and bind to inherited file descriptors indicated by
environment variables.

einhyrningsins(1) is a partially-comparible re-implementation of einhorn(1) (a
Ruby program) in Rust.  Einhorn itself derived from Unicorn.


    -4, --ipv4-only     only accept IPv4 connections
    -6, --ipv6-only     only accept IPv6 connections
    -m, --manual        manual (explicit) acknowledge mode
    -n, --number COUNT  how many program copies to spawn
    -b, --bind ADDR     socket(s) to bind to

* `-h`, `--help`
  Print a help menu
        --version       print the version
    -v, --verbose       more debugging messages

## STATUS

This is a fun fun hobby project. Still in progress, and notably untested.

## COPYRIGHT
Copyright 2016  Bryan Newbold
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO
WARRANTY, to the extent permitted by law.

## SEE ALSO
`einhorn (1)`, `einhyrningsinsctl(1)`