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jimklimov / 01-NUT-protocol-completeness-v2.8.5.md
Last active April 8, 2026 02:11

Completeness Audit of Client Implementations

The client implementations in libupsclient (C), libnutclient (C++), PyNUT (Python), Nut.pm (Perl), and jNut (Java) were audited against the NUT network protocol defined in docs/net-protocol.txt.

1. C Library: clients/upsclient.c (libupsclient)

The C library is the most mature and complete implementation, used by most core NUT utilities (upsc, upscmd, upsrw, upsmon).

  • Commands: Supports all protocol commands: GET, LIST, SET, INSTCMD, LOGIN, LOGOUT, USERNAME, PASSWORD, VER, NETVER, HELP, STARTTLS, PRIMARY/MASTER, FSD.
  • Sub-commands: Full support for GET (VAR, TYPE, DESC, CMDDESC, UPSDESC, NUMLOGINS) and LIST (UPS, VAR, RW, CMD, ENUM, RANGE, CLIENT).
  • SSL/TLS: Comprehensive support for both OpenSSL and Mozilla NSS backends via upscli_sslinit and upscli_tryconnect.
  • Tracking: Implements protocol 1.3 TRACKING support (GET/SET TRACKING).
@jimklimov
jimklimov / jenkins-agent-toggle.sh
Last active March 21, 2026 16:34
Jenkins agent toggle script
#!/bin/sh
# Toggle Jenkins agent(s) running on local system on and off
# (e.g. free up CPU when needed for something else temporarily).
#
# (C) 2026 Jim Klimov <jimklimov+nut@gmail.com>
#
# Posted at https://gist.github.com/jimklimov/e8841ff5bbcf6a23a8ece7fe7cb53eb9
# Inspired by discussion at
# https://stackoverflow.com/questions/61389821/get-running-build-status-on-a-given-jenkins-worker-node
@jimklimov
jimklimov / README.md
Last active November 29, 2025 11:24
Proxmox LXC in chroot filesystem

Specifying a zero size for filesystem lets LXC backend use the "subvol" directories rather than disk images. The latter were problematic for "pxvirt" 9.0.10-2 on Raspberry/trixie with ZFS (there raw ext4 images are okay for direct fsck/mount, until PVE mounts them and the system locks up with timed-out processes).

GUI may forbid specifying 0 as disk size, CLI to the rescue then.

Thanks to https://forum.proxmox.com/threads/proxmox-4-lxc-chroot-instead-of-raw-images.22881/ for CLI examples:

pct create 110 /var/lib/vz/template/cache/ubuntu-14.04-standard_14.04-1_amd64.tar.gz -hostname servername -password 'p@ssw0rd' -rootfs local:0

Comparing two setups:

@jimklimov
jimklimov / index.html
Last active November 18, 2025 11:11
Jenkins CME troubleshooting ideas from ChatGPT updated 20251118
<!DOCTYPE html><html>
<link rel="stylesheet" href="https://cdn.oaistatic.com/assets/root-dxedo8gg.css"/><link rel="stylesheet" href="https://cdn.oaistatic.com/assets/conversation-small-c80izxqg.css"/>
<body style="background-color:#404040">
<div style="background-color:#404040" class="flex flex-col text-sm thread-xl:pt-header-height pb-25"><article class="text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto scroll-mt-(--header-height)" tabindex="-1" dir="auto" data-turn-id="76b36e2a-fced-457d-9e2b-7435b6d37214" data-testid="conversation-turn-1" data-scroll-anchor="false" data-turn="user"><h5 class="sr-only">You said:</h5><div class="text-base my-auto mx-auto pt-3 [--thread-content-margin:--spacing(4)] thread-sm:[--thread-content-margin:--spacing(6)] thread-lg:[--thread-content-margin:--spacing(16)]
@jimklimov
jimklimov / gist:f379805ffc02ae8d9f853b446e4bbf37
Created September 21, 2025 11:47
Jenkins CSRF config check
// From https://community.jenkins.io/t/random-403-invalid-crumb-messages-through-out-jenkins/35619/4
// by @poddingue - Bruno Verachten, GSoC Mentors
import jenkins.model.Jenkins
import hudson.security.csrf.CrumbIssuer
import jenkins.security.s2m.AdminWhitelistRule
def j = Jenkins.instance
println "=== Jenkins Security & CSRF Diagnostics ==="
@jimklimov
jimklimov / curler-simpleMove.groovy
Last active April 19, 2025 13:23
Mass-move Jenkins queue items
// requires Simple Queue Plugin : https://plugins.jenkins.io/simple-queue/
// run this in Jenkins console to generate shell code
// create a token in sysadmin account, save as e.g. `~/.sq` in a trusted workstation
// and in a shell session define JENKINS_URL="https://USERNAME:`cat ~/.sq`@SERVERNAME"
// then paste the result of script below (tweak "it" matcher to your needs)
def q = Jenkins.instance.queue
def pattern = ~/.*jobname.*1234.*/
def ACTION = "DOWN_FAST"
//def ACTION = "UP_FAST"
@jimklimov
jimklimov / network-start.sh
Created April 9, 2025 11:10
WSL2 Linux VM networking init
#!/bin/sh
# https://superuser.com/questions/1582234/make-ip-address-of-wsl2-static/1808525#1808525
# https://superuser.com/a/1723531/433945
# Add to /etc/wsl.conf as boot/command="/root/network-start.sh" for autostart
# (C) 2023-2025 by Jim Klimov (and other SO/GH/blog authors)
#
# This script assigns a fixed IP to the VM, fixes up DNS,
# allows fixed port on host for SSH dial-back into the VM
# and starts the SSH server.
@jimklimov
jimklimov / xmllint-jenkins-builds.sh
Created April 7, 2025 07:51
Parsing Jenkins build history for broken XML files with xmllint
# 1) Jenkins uses XML 1.1 standard that did not pick up in the industry after 20 years.
# So browsers and xmllint claim they do not know of it: https://stackoverflow.com/a/4508357
# Jenkins docs suggest replacing with "1.0" should suffice: https://www.jenkins.io/doc/upgrade-guide/2.107/
# 2) changelogNNNNNNNNNN.xml files are not XML but git commit info in fact
# 3) Some of those are plain empty and upset xmllint
# 4) xmllint insists on having an input file, so after rewrites we give it /dev/stdin.
# This path name may be a feature of bash and/or certain platforms.
find . -name '*.xml' | while read F ; do
[ -s "$F" ] || continue;
@jimklimov
jimklimov / gist:940742b4ed756e070095199e0335ca13
Created February 5, 2025 17:30
Exploratory Groovy to list GIT sources of MBP Jobs
Jenkins.instance.getAllItems(org.jenkinsci.plugins.workflow.job.WorkflowJob).each { def project ->
//def flow = project.getDefinition()
//println "=== ${project.fullName}" // + " => ${flow} => ${flow.getDescriptor()}"
// + " - " + project.properties
def brProp = project.getProperty(org.jenkinsci.plugins.workflow.multibranch.BranchJobProperty.class)
def br = brProp?.getBranch()
def brScm = br?.getScm()
//println " * ${brScm && brScm instanceof hudson.plugins.git.GitSCM ? brScm.getScmName() : brScm} => ${br?.getName()} => ${br?.getHead()} => ${br?.getSourceId()}"
if (brScm && brScm instanceof hudson.plugins.git.GitSCM) {
@jimklimov
jimklimov / README.md
Last active November 19, 2025 11:47
QEMU-GA on OmniOS and OpenIndiana
  • Install the qemu package which contains a .../bin/qemu-ga(OOCE Extra repo in case of OmniOS) among the server implementation
:; pkg install qemu

# On OmniOS also:
:; ln -s ../../opt/ooce/bin/qemu-ga /usr/bin
  • Edit config file; note that the method and path depend on hypervisor-provided device (virtio-agent or ISA -- without a dedicated driver package, only the latter