Matouš Jan Fialka mjf

Unix and network operator

mjf / practice_chinese_numbers.sh

Created September 9, 2012 16:19

Practice Chinese Numbers from 0 to 10

	#! /bin/sh

	# Practice Chinese Numbers from 0 to 10 (in Pinyin)
	# Copyright (C) 2012 Matous J. Fialka, <http://mjf.cz/>
	# Released under the terms of The MIT License
	#
	# Note: requires UTF-8 ANSI-compatible terminal (XTerm)

	hanzi[0]='零'
	hanzi[1]='一'

mjf / asciips

Created October 11, 2012 10:49

ASCIIPS - ASCII file to PostScript Converter

	#! /bin/sh

	# ASCIIPS - ASCII file to PostScript Converter
	# Copyright (C) 2012 Matous J. Fialka, <http://mjf.cz/>
	# Released under the terms of The MIT License

	ASCIIPS_CREATOR=${ASCIIPS_CREATOR:-ASCIIPS}
	ASCIIPS_FONT=${ASCIIPS_FONT:-Courier}
	ASCIIPS_FONTSIZE=${ASCIIPS_FONTSIZE:-12}

mjf / ascii.h

Created October 25, 2012 00:09

ascii.h - Macros and constants for 7-bit ASCII

	/**
	* ascii.h - Macros and constants for 7-bit ASCII
	* Copyright (C) 2012 Matous J. Fialka, <http://mjf.cz/>
	* Released under the terms of The MIT License
	*/

	#ifndef ASCII_H
	#define ASCII_H

	#define is_7bit(x) ((x & 0x80) == 0)

mjf / pingfmt

Created November 29, 2012 01:45

pingfmt

	#! /usr/bin/awk -f

	# PINGFMT - Format output of the ping(1) program
	# Copyright (C) 2012 Matous J. Fialka, <http://mjf.cz/>
	# Released under the terms of The MIT License

	BEGIN {
	# ----- HELP SCREEN -----

	help = help "Usage: pingfmt [-h\|-help\|-usage] [+[no][show]<opt>[=<val>]]\n"

mjf / ifchanged.sh

Last active December 10, 2015 21:08

IfChanged - returns 0 if file changed, 127 otherwise

	#! /bin/sh

	# IfChanged - returns 0 if file changed, 127 otherwise
	# Copyright (C) 2013 Matous J. Fialka, <http://mjf.cz/>
	# Released under the terms of The MIT License

	fpath="$(realpath 2>/dev/null ""$1"")" \|\| {
	echo "Error: realpath $1 failed" 1>&2
	exit 1
	}

mjf / preen

Last active August 25, 2021 06:15

PREEN - Preen current path by file type

	#! /bin/sh

	# PREEN - Preen current/working directory by file type
	# Copyright (C) 2013,2018,2020 Matous J. Fialka, <https://mjf.cz/>
	# Released under the terms of The MIT License

	PREENDIR="${PREENDIR:-.preen}"
	PREENRC="${PREENRC:-.preenrc}"

	for util in which find file test mkdir ln

mjf / changed

Created March 28, 2013 10:58

Shell script to detect file or directory has changed using ls, sha1sum, mv and cmp

	#! /bin/sh

	checksum=`echo $@ \| sha1sum - \| cut -d ' ' -f 1`

	if ! [ -e /tmp/$checksum.ls-ZlaR ]
	then
	if ! ls -ZlaR $@ > /tmp/$checksum.ls-ZlaR
	then
	echo changed: could not create /tmp/$checksum.ls-ZlaR 1>&2
	exit 1

mjf / ip6rev.sh

Last active January 11, 2019 10:23

Simple IPv6 PTR helper

	#! /bin/sh

	# ip6rev - Generate IPv6 PTR DNS RR
	# Copyright (C) 2012 Matous J. Fialka, <http://mjf.cz/>
	# Released under the terms of "The MIT License"

	if [ $# -lt 1 -o -$# -gt 3 ]; then
	cat <<- EOT
	ip6rev ip6 rev [oct]

mjf / vendor.sh

Last active December 15, 2015 19:19

Get MAC vendor according to the oui.txt by IEEE

	#! /bin/sh

	# Hint: paragraph and mac can be found in my gists as well.
	# Cron: 30 4 * * * rm ~/.oui.txt && /usr/local/bin/vendor >/dev/null

	if ! [ -f ~/.oui.txt ]
	then
	wget -qO ~/.oui.txt http://standards.ieee.org/develop/regauth/oui/oui.txt
	fi

mjf / grep_priv_ip4.sed

Last active December 17, 2015 01:58

Match lines containing IPv4 private addresses. TODO: aggregate into single regular expression