brimston3’s gists

brimston3 / lsiommugroups.bash

Created June 21, 2017 13:46

IOMMU group identification

	#!/bin/bash

	# I have no idea where I got this script, possibly here:
	# https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF

	for d in /sys/kernel/iommu_groups//devices/ ; do
	n=${d#/iommu_groups/}
	n=${n%%/*}
	printf 'IOMMU Group %s ' "$n"
	lspci -nns "${d##*/}"

brimston3 / restrict_punning.c

Created June 14, 2017 22:02

unexpected success with restrict keyword punning

	// I expect this to generate errors on mismatched prototypes but apparently it does not. I should probably figure out why.

	// gcc -std=c1x -Wstrict-aliasing -Wall -Wno-unused-but-set-variable restrict_punning.c
	// clang -std=c1x -Wstrict-aliasing -Wall restrict_punning.c

	void f1(char * restrict a, char * b)
	{
	return;
	}

brimston3 / xc8_bug_syntax.c

Created May 2, 2017 15:04

xc8 1.41 syntax error in temporary file

	#include <xc.h>
	#include <stdint.h>

	typedef struct _cmd_read_write_disp
	{
	uint8_t cmd;
	void (*newseq)();
	// ... Reduced for brevity ...
	} CMD_READ_WRITE_DISP_ST;

brimston3 / debian_llvm39_link_check.sh

Last active April 15, 2017 01:34

Check libllvm-3.9.so dynamic links

	#!/bin/sh
	for bin in $(dpkg -L llvm-3.9 clang-3.9 llvm-3.9-runtime llvm-3.9-tools \| xargs ls -ld \| grep -E '^-r.x' \| awk '{print $9}')
	do
	ldd "$bin" 2> /dev/null \| awk -v binname="$bin" '{print binname "::" $0}'
	done \| grep -i libllvm \| grep -Fv 'libLLVM-3.9.so.1::'

brimston3 / conky.conf

Created April 11, 2017 22:42

pi3 conkyrc

brimston3 / route_dev_prio.sh

Created April 11, 2017 19:35

Give wlan0 routing priority

	#!/bin/sh

	TARGET_IF=wlan0
	ADDPRIO=101
	DEFAULT_RT=$(ip ro show dev "$TARGET_IF" \| grep 'default' \| cut -d' ' -f3 \| tail -1)
	if [ -n "$DEFAULT_RT" ]; then
	sudo ip ro add default via $DEFAULT_RT metric $ADDPRIO

	sudo sed -i -e 's@^nameserver 10\.8\.1\.@#\0@' /etc/resolv.conf
	else

brimston3 / getopt.c

Created March 6, 2017 19:27 — forked from superwills/getopt.c

getopt.h / getopt.c, from http://www.raspberryginger.com/jbailey/minix/html/lib_2posix_2getopt_8c-source.html

	// Put this in a separate .h file (called "getopt.h").
	// The prototype for the header file is:
	/*
	#ifndef GETOPT_H
	#define GETOPT_H

	int getopt(int nargc, char * const nargv[], const char *ostr) ;

	#endif
	*/

brimston3 / do_not_do_this_interfaces

Created February 14, 2017 22:31

Things you should not do with /etc/network/interfaces

	##################################################################
	# If you have not read the multiple disclaimers, do not do this. #
	# It is supposed to be a joke, haha. #
	##################################################################

	This goofiness is valid:

	/etc/network/interfaces:
	for procif in /etc/network/interfaces.d/*; do
	procifname="$(basename $procif)"

brimston3 / Makefile

Last active February 13, 2017 21:07

cygwin sign unsigned binaries

	# Makefile called like so:
	#SIGN=YES gmake
	RELEASEFILES:=a.exe a.dll
	SIGNED_SDIR:=signed_bin
	UNSIGNED_SDIR:=unsigned_bin
	ODIR:=install
	SIGNTOOL:='/cygdrive/c/Program Files (x86)/Windows Kits/8.1/bin/x64/signtool.exe'
	# Update with your signtool options:
	SIGOPTS:=/tr http://timestamp.digicert.com /td sha256 /fd sha256 /i DigiCert_Test

brimston3 / FindKeyutils.cmake

Last active February 1, 2017 20:07

CMake FindKeyutils module

	# This module defines
	# Keyutils_LIBRARIES, the name of the libraries to link against
	# Keyutils_FOUND, if false, do not try to link keyutils
	# Keyutils_INCLUDE_DIRS, where to find keyutils.h and dependent includes
	#
	# As keyutils is a Linux interface, paths for other OSes are not defined
	#
	# Copyright (c) 2017, Andrew Domaszek
	#
	# Distributed under the OSI-approved BSD 3-Clause License. See accompanying

	#!/bin/sh
	for bin in $(dpkg -L llvm-3.9 clang-3.9 llvm-3.9-runtime llvm-3.9-tools \| xargs ls -ld \| grep -E '^-r.x' \| awk '{print $9}')
	do
	ldd "$bin" 2> /dev/null \| awk -v binname="$bin" '{print binname "::" $0}'
	done \| grep -i libllvm \| grep -Fv 'libLLVM-3.9.so.1::'