pid1 alternatives and similar packages
Based on the "System" category.
Alternatively, view pid1 alternatives based on common mentions on social networks and blogs.
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ghc-hotswap
DISCONTINUED. Example code for how we swap compiled code within a running Haskell process. -
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plugins
Dynamic linking and runtime evaluation of Haskell, and C, including dependency chasing and package resolution. -
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ascii-progress
A simple Haskell progress bar for the console. Heavily borrows from TJ Holowaychuk's Node.JS project -
language-puppet
A library to work with Puppet manifests, test them and eventually replace everything ruby. -
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README
pid1
Do signal handling and orphan reaping for Unix PID1 init processes.
This provides a Haskell library, and an executable based on that library, for initializing signal handlers, spawning and child process, and reaping orphan processes. These are the responsibilities that must be fulfilled by the initial process in a Unix system, and in particular comes up when running Docker containers.
This library/executable will automatically detect if it is run as some process
besides PID1 and, if so, use a straightforward exec system call instead.
NOTE This package is decidedly not portable, and will not work on Windows. If you have a use case where you think it makes sense to run on Windows, I'd be interested in hearing about it.
For a discussion on why this is useful, see this repo.
Usage
pid1 [-e|--env ENV] [-u|--user USER] [-g|--group GROUP] [-w|--workdir DIR] [-t|--timeout TIMEOUT] COMMAND [ARG1 ARG2 ... ARGN]
Where:
-e,--envENV- Override environment variable from given name=value pair. Can be specified multiple times to set multiple environment variables.-u,--userUSER- The username the process will setuid before executing COMMAND-g,--groupGROUP- The group name the process will setgid before executing COMMAND-w,--workdirDIR- chdir toDIRbefore executing COMMAND-t,--timeoutTIMEOUT- timeout (in seconds) to wait for all child processes to exit
The recommended use case for this executable is to embed it in a Docker image.
Assuming you've placed it at /sbin/pid1, the two commonly recommended usages
are:
- Override the entrypoint, either via
ENTRYPOINTin your Dockerfile or--entrypointon the command line.
docker run --rm --entrypoint /sbin/pid1 fpco/pid1 ps
- Add
/sbin/pid1to the beginning of your command.
docker run --rm --entrypoint /usr/bin/env fpco/pid1 /sbin/pid1 ps