jhgorse’s gists

jhgorse / bash_producer_consumer.sh

Last active September 7, 2016 04:10

bash batch sequential producer consumer

	#! /usr/bin/env bash

	# TODO: Add a queue element for generated pids so that the
	# producer may run in parallel with consumer loop

	# Some function that takes a long time to process
	longprocess() {
	# Sleep up to 6 seconds
	sleep $((3 + RANDOM % 3))
	# Randomly exit with 0 or 1

jhgorse / stap_kmod_kernel_func_checker.sh

Last active September 7, 2016 20:18

Extracts unresolved symbols for a Loadable Kernel Module then checks systemtap to see if those symbols are available in the kernel symbol map, returning only those which are able to be tapped.

	#! /usr/bin/env bash

	# Extracts unresolved symbols for a Loadable Kernel Module (LKM)
	# then checks systemtap to see if those symbols are available
	# in the kernel symbol map, returning only those which are able
	# to be tapped.
	# Note: one may also append a '?' to the function
	# in the stap script to denote optional probes:
	# probe kernel.function("foo")? , kernel.function("bar"), ... { println(pp()) }
	# or check faster with:

jhgorse / bcc_tutorial_soutions

Created December 30, 2016 17:45

tutorial solutions for bcc

# Selected solutions for https://github.com/iovisor/bcc/blob/master/docs/tutorial_bcc_python_developer.md

jhgorse / parallel_find_test.sh

Created March 30, 2017 18:06

parallel stat test

	#!/usr/bin/env bash

	# parallel testing
	#
	# arg: basename of the test
	# output: results/$basename_`date +"%m-%d-%H_%m_%S"`/

	# assumes we are in same directory with afs_dir_test_setup.sh

	pids=""

jhgorse / afs_linux_write_begin-indent.stp

Created July 17, 2018 23:37

Traces afs_linux_write_begin() into the kernel grab_cache_page_write_begin()

	// Traces afs_linux_write_begin() into the kernel grab_cache_page_write_begin()

	global traceme

	function printf_indent(str, parm_str) {
	printf ("%s -> %s P %s\n", thread_indent(1), str, parm_str);
	}
	function printf_deindent(str, ret_str) {
	printf ("%s <- %s R %s\n", thread_indent(-1), str, ret_str);
	}

jhgorse / fail_page_alloc.sh

Last active September 19, 2018 02:15

Inject page allocation failures for a specific kernel module, linux 4x

	#!/bin/bash

	# Inject page allocation failures only for a specific module
	# Requires debugfs and kernel fault injection framework enabled

	FAILTYPE=fail_page_alloc
	module=$1

	if [ -z $module ]
	then

jhgorse / .config

Created July 24, 2018 21:08

kernel fault inject framework config for kernel 4.4.0 i686 (32-bit)

	#
	# Automatically generated file; DO NOT EDIT.
	# Linux/x86 4.4.134 Kernel Configuration
	#
	# CONFIG_64BIT is not set
	CONFIG_X86_32=y
	CONFIG_X86=y
	CONFIG_INSTRUCTION_DECODER=y
	CONFIG_PERF_EVENTS_INTEL_UNCORE=y
	CONFIG_OUTPUT_FORMAT="elf32-i386"

jhgorse / calamp_build_world fail.log

Created March 26, 2019 20:56

	make[3]: Leaving directory '/home/jhg/work/lmu5530_sdk/openwrt/tools/bison'
	make[3]: Entering directory '/home/jhg/work/lmu5530_sdk/openwrt/tools/mklibs'
	(cd /home/jhg/work/lmu5530_sdk/build_dir/host/mklibs-0.1.35; rm -f aclocal.m4; if [ -f ./configure.ac ] \|\| [ -f ./configure.in ]; then [ -d ./autom4te.cache ] && rm -rf autom4te.cache; [ -e ./config.rpath ] \|\| ln -s /home/jhg/work/lmu5530_sdk/scripts/config.rpath ./config.rpath; touch NEWS AUTHORS COPYING ABOUT-NLS ChangeLog; AUTOM4TE=/home/jhg/work/lmu5530_sdk/staging_dir/host/bin/autom4te AUTOCONF=/home/jhg/work/lmu5530_sdk/staging_dir/host/bin/autoconf AUTOMAKE=/home/jhg/work/lmu5530_sdk/staging_dir/host/bin/automake ACLOCAL=/home/jhg/work/lmu5530_sdk/staging_dir/host/bin/aclocal AUTOHEADER=/home/jhg/work/lmu5530_sdk/staging_dir/host/bin/autoheader LIBTOOLIZE=/home/jhg/work/lmu5530_sdk/staging_dir/host/bin/libtoolize LIBTOOL=/home/jhg/work/lmu5530_sdk/staging_dir/host/bin/libtool M4=/home/jhg/work/lmu5530_sdk/staging_dir/host/bin/m4 AUTOPOINT=true /home/j

jhgorse / pycom esp32 Dockerfile

Created May 24, 2019 19:39

	FROM ubuntu:16.04

	# Install build dependencies (and vim for editing)
	RUN apt-get -qq update \
	&& apt-get install -y git build-essential wget make libncurses-dev flex bison gperf python python-serial python-dev libssl-dev libffi-dev vim \
	&& apt-get clean \
	&& wget https://bootstrap.pypa.io/get-pip.py \
	&& python get-pip.py \
	&& ln -s /usr/local/bin/pip /usr/bin/pip \
	&& pip install --upgrade setuptools\

jhgorse / openvpn_client_instructions_connman

Last active June 14, 2019 04:17

OpenElec/OSMC/etc ConnMan + OpenVPN client

	# Resolve by hack ConnMan + OpenVPN Client inability to add/del default route
	# TODO: Get this packaged for upstream somewhere OpenVPN, ConnMan, OSMC, *Elec
	# perhaps with systemd after openvpn goes up.

	### Example output of openvpn client:
	# Fri Jun 14 00:04:39 2019 /sbin/ip route add 0.0.0.0/0 via 192.168.xxx.1
	# RTNETLINK answers: File exists
	# Fri Jun 14 00:04:39 2019 ERROR: Linux route add command failed: external program exited with error status: 2