akorn

#!/bin/zsh
#
# Copyright (c) 2019-2022 András Korn. License: GPLv3
#
# Take a set of network interfaces and determine which one is plugged into a specific network. Then rename the interface.
#
# This script supplies some generic functions for that purpose; the actual logic comes from configuration (you need to override the detect() function and perhaps the last_resort() function).
#
# The script is concurrency capable. It processes candidate interfaces simultaneously, obtaining a lock for each; other instances skip locked interfaces and add them to the end of their queue.
# Several instances can run concurrently with overlapping candidate POOLs.

akorn

#!/bin/zsh
#
# Copyright (C) 2016, 2022 András Korn. Licensed under the GPL v3.
#
# Purpose: query the status of all local SATA hard drives and summarize in a table.
#
# Not complete, but good enough for my own purposes. Patches welcome.

typeset -A diskattrs
typeset -A diskargs

akorn

#!/bin/zsh
#
# Purpose: run specified command with specified arguments and cache result. If cache is fresh enough, don't run command again but return cached output.
# Also cache exit status and stderr.
# Copyright (c) 2019-2023 András Korn; License: GPLv3

# Use silly long variable names to avoid clashing with whatever the invoked program might use
RUNCACHED_MAX_AGE=${RUNCACHED_MAX_AGE:-300}
RUNCACHED_IGNORE_ENV=${RUNCACHED_IGNORE_ENV:-0}
RUNCACHED_IGNORE_PWD=${RUNCACHED_IGNORE_PWD:-0}

akorn

#!/bin/zsh
zfs get all -Hp -s local,received >/var/backups/zfs-properties.txt
zpool get all >/var/backups/zpool-properties.txt
for i in $(zfs list -t filesystem,volume -H -o name); do
        unset props
        zfs get all -o property,value -Hp -s local,received $i | while read prop value; do
                props=($props[@] "-o $prop"="'$value'")
        done
        echo zfs create ${(o)props[@]} $i
done >/var/backups/zfs-create-commands.txt

akorn

#!/bin/zsh
#
# Idea from http://log.or.cz/?p=356
#
# Copyright (c) 2017-2020 András Korn. License: GPLv3
#
# Run this from a user-level runsvdir (runit), or from an endless loop, or using systemd, set to restart.
#
# Make sure you start browsers in their own process group (e.g. `chpst -P browser`). (TODO: maybe support cgroups?)

akorn

#!/bin/zsh
#
# Copyright (c) 2014, 2020 by Dr. András Korn. Implements the basic idea of a similar script by Robert Coup (2013).
# License: GPLv3

function usage() {
	echo 'Usage:

rsync_parallel [--parallel=N] <args to find(1) to generate list of stuff to transfer> -- <args to rsync>