m13253’s gists

m13253 / retry.sh

Created May 24, 2014 15:53

A shell script to keep trying a command until it succeeds

	#!/bin/bash

	_RETRY_COUNT=0
	while true
	do
	("$@") && break
	let _RETRY_COUNT=${_RETRY_COUNT}+1
	echo -e "\e[1;31mRetry ${_RETRY_COUNT}...\e[0m"
	sleep 0.5; echo -ne '\a'; sleep 0.5; echo -ne '\a'; sleep 0.5; echo -ne '\a'; sleep 0.5
	done

m13253 / rot.wxm

Last active December 14, 2023 16:39

wxMaxima document of https://github.com/m13253/danmaku2ass/issues/7#issuecomment-44860472

	/* [wxMaxima batch file version 1] [ DO NOT EDIT BY HAND! ]*/
	/* [ Created with wxMaxima version 13.04.2 ] */

	/* [wxMaxima: input start ] */
	FlashRot:matrix(
	[ cos(rotY)cos(rotZ), cos(rotY)sin(rotZ), sin(rotY), 0],
	[-sin(rotZ), cos(rotZ), 0, 0],
	[-sin(rotY)cos(rotZ), -sin(rotY)sin(rotZ), cos(rotY), 0 ],
	[trX, trY, 0, 1]);
	/* [wxMaxima: input end ] */

m13253 / gensslcert.sh

Last active August 29, 2015 14:04

Generate a self-signed SSL certificate for web server

	#!/bin/bash

	set -e
	outpemfile="${1:-cert.pem}"
	tmpprefix="/tmp/gensslcert-$$"
	openssl genrsa -des3 -out "$tmpprefix.key" 2048
	openssl req -new -key "$tmpprefix.key" -out "$tmpprefix.csr"
	openssl rsa -in "$tmpprefix.key" -out "$outpemfile"
	rm -f "$tmpprefix.key"
	openssl x509 -req -days 365 -in "$tmpprefix.csr" -signkey "$outpemfile" -out "$tmpprefix.crt"

m13253 / geordidump.c

Created September 11, 2014 16:20

	# Geordi memory dumper
	geordi: {size_t s=0x400000;printf("0x%08zx: ",s);for(size_t p=s;p<s+64;p++){unsigned char c=(const unsigned char )p;printf((c>31&&c<127)?"%c":"\\x%02x",c);}}

m13253 / kbgrid_horz.svg

Last active August 29, 2015 14:06

Image representing MIDI keyboard

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m13253 / usbreset.c

Created November 2, 2014 16:26

Send a USB port reset to a USB device -- http://askubuntu.com/a/661/299378

	/* usbreset -- send a USB port reset to a USB device */
	/* http://askubuntu.com/a/661/299378 */

	#include <stdio.h>
	#include <unistd.h>
	#include <fcntl.h>
	#include <errno.h>
	#include <sys/ioctl.h>

	#include <linux/usbdevice_fs.h>

m13253 / dumpargv.py

Created December 30, 2014 14:03

A script which dumps the command line passed to it

	#!/usr/bin/env python

	'''Dump the command line passed to it'''

	import sys


	def quote_argv(argv):
	for i in argv:
	apos = ' ' in i or '\\' in i

m13253 / default.pa

Last active August 29, 2015 14:15

	# To record both mic and other audio input sources we need to add a named output sink. See:
	# http://www.linuxquestions.org/questions/linux-software-2/alsa-and-pulseaudio-recording-multiple-input-devices-877614/
	# http://www.youtube.com/watch?v=oJADNOY615Y&feature=player_embedded
	# Add this to your /etc/pulse/default.pa file

	load-module module-null-sink sink_name=stream
	load-module module-loopback latency_msec=5 sink=stream
	load-module module-loopback latency_msec=5 sink=stream

m13253 / SourceHanSans-sample.html

Last active August 29, 2015 14:20

Sample text document for Source Han Sans font

	<!DOCTYPE html>
	<html lang="zh-cn">
	<head>
	<meta charset="utf-8" />
	<style>
	p {
	width: 600px;
	font-family: "Source Han Sans SC Normal";
	font-weight: 300;
	font-size: 18px;

m13253 / live.sh

Last active August 29, 2015 14:20

My screencast live stream configuration

	# Personal reminder
	# Do not use it unless you know what it means!

	parec --rate=48000 --format=float32le -d alsa_output.pci-0000_00_1b.0.analog-stereo.monitor \| \
	ffmpeg -f x11grab -video_size 1366x768 -framerate 25 -i :0 \
	-f f32le -ar 48k -ac 2 -i - \
	-vf setpts='(RTCTIME-RTCSTART)/(TB*1000000)' \
	-b:v 512k -c:v libx264 -profile:v main -pix_fmt yuv420p -level:v 4.1 -tune:v zerolatency -preset:v ultrafast -g:v 25 \
	-b:a 96k -c:a libfdk_aac -profile:a aac_he \
	-f flv -vsync passthrough rtmp://localhost/live

Star Brilliant m13253