JonathonReinhart

// unaligned.h
// Safely access unaligned multi-byte values (e.g on ARM)
// Jonathon Reinhart
 
// The use of 'packed' forces the compiler to assume no better
// than 1-byte alignment, and issue sequential byte reads/writes.
typedef union __attribte__((packed)) {
    int16_t     int16;
    uint16_t    uint16;
    int32_t     int32;

JonathonReinhart

#include <stddef.h>

typedef size_t foo_h;
typedef size_t bar_h;

void foo(foo_h h) { (void)h; }
void bar(bar_h h) { (void)h; }

int main(void)
{

JonathonReinhart

#include <stdint.h>
#include <stddef.h>
#include <stdio.h>

#define __packed  __attribute__((packed))

/* https://commons.wikimedia.org/wiki/File:Table_of_x86_Registers_svg.svg */

#define REGDEF_hl(Z)   \
    union __packed {        \

JonathonReinhart

// Derived from http://stackoverflow.com/a/7776146/119527

void fhexdump(FILE *f, const void *addr, size_t len, const char *addrfmt, size_t baseaddr)
{
    size_t i;
    unsigned char buff[17];
    const unsigned char *pc = addr;

    // Process every byte in the data.
    for (i = 0; i < len; i++) {

JonathonReinhart

[user]
	email = jonathon.reinhart@gmail.com
	name = Jonathon Reinhart
[color]
	ui = true
[core]
	# I can exclude my own editor's files; no need to include in project .gitignore
	excludesfile = ~/.gitignore_global
	editor = vim
[push]

JonathonReinhart

#!/bin/sh
# This prevents docker config from persisting to disk.
# Place this file in /etc/profile.d/ to happen automatically at login for all users.
# JRR 2015-12-17
# See:
#    https://github.com/docker/docker/issues/10318
#    https://github.com/docker/docker/issues/18708

dockercfgdir="/dev/shm/dockercfg-$(id -un)"

JonathonReinhart

#!/bin/sh
# Using Vim to view strace output
strace -o'!vim -R -' "$@"

JonathonReinhart

#ifndef A_DOT_H_INCLUDED
#define A_DOT_H_INCLUDED

#include "b.h"

struct a
{
    struct b *b;
};

JonathonReinhart

Windows (PowerShell) (DER format):
  Invoke-WebRequest -UseBasicParsing http://example.com/example.cer -OutFile example.cer
  certutil.exe -addStore "Root" example.cer

  
Debian 8 (PEM format):
  # wget -O /usr/local/share/ca-certificates/example.crt http://example.com/example.cer
  # update-ca-certificates

  

JonathonReinhart

void *search_without_goto(const char *key)
{
    int i;
    void *result;
    
    for (i = 0; i < some_length; i++) {
        if (strcmp(some_collection[i].key, key) == 0)
            break;
    }
    if (i == some_length)