northox

#!/bin/sh
path=snapshots
url=ftp://openbsd.cs.toronto.edu/pub/OpenBSD/
rel=`uname -r`
major=`echo $rel | sed 's/\..*//'`
minor=`echo $rel | sed 's/.*\.//'`

mkdir -p $path
cd $path

nicowilliams

I recently happened upon a very interesting implementation of popen() (different API, same idea) called popen-noshell using clone(2), and so I opened an issue requesting use of vfork(2) or posix_spawn() for portability. It turns out that on Linux there's an important advantage to using clone(2). I think I should capture the things I wrote there in a better place. A gist, a blog, whatever.

This is not a paper. I assume reader familiarity with fork() in particular and Unix in general, though, of course, I link to relevant wiki pages, so if the unfamiliar reader is willing to go down the rabbit hole, they should be able to come ou

leommoore

function btoa(str) {
    
    if ((typeof str) !== 'string') {
        str = JSON.stringify(str);
    }
    
    var buffer;
    
    if (str instanceof Buffer) {
      buffer = str;

SplittyDev

Freestanding x86 itoa implementation

For use in OS development.
Designed to be assembled with NASM, porting it over to other assemblers should be easy.

License

You are free to use, modify, distribute and sell this code.
A small message referring to this gist would be nice, though not required.

Important

This implementation uses a custom calling convention.

MightyPork

/**
 * USB HID Keyboard scan codes as per USB spec 1.11
 * plus some additional codes
 * 
 * Created by MightyPork, 2016
 * Public domain
 * 
 * Adapted from:
 * https://source.android.com/devices/input/keyboard-devices.html
 */

zrsmith92

use libc::{c_char, c_int};

extern {
	#[allow(dead_code)]
    pub fn puts(str: *const c_char) -> c_int;

    #[allow(dead_code)]
    pub fn printf(format: *const c_char, ...) -> c_int;
}

fcaylus

#
# Colored defines
#

RCol='\e[0m'    # Text Reset

# Regular           Bold                Underline           High Intensity      BoldHigh Intens     Background          High Intensity Backgrounds
Bla='\e[0;30m';     BBla='\e[1;30m';    UBla='\e[4;30m';    IBla='\e[0;90m';    BIBla='\e[1;90m';   On_Bla='\e[40m';    On_IBla='\e[0;100m';
Red='\e[0;31m';     BRed='\e[1;31m';    URed='\e[4;31m';    IRed='\e[0;91m';    BIRed='\e[1;91m';   On_Red='\e[41m';    On_IRed='\e[0;101m';
Gre='\e[0;32m';     BGre='\e[1;32m';    UGre='\e[4;32m';    IGre='\e[0;92m';    BIGre='\e[1;92m';   On_Gre='\e[42m';    On_IGre='\e[0;102m';

BertrandBordage

; À compiler avec nasm -felf64 cat.asm && ld cat.o -o cat

%define SYS_EXIT 60
%define SYS_READ 0
%define SYS_WRITE 1
%define SYS_OPEN 2
%define SYS_CLOSE 3
%define STDOUT 1

%define BUFFER_SIZE 2048

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

tonious

/* Read this comment first: https://gist.github.com/tonious/1377667#gistcomment-2277101
 * 2017-12-05
 * 
 *  -- T.
 */

#define _XOPEN_SOURCE 500 /* Enable certain library functions (strdup) on linux.  See feature_test_macros(7) */

#include <stdlib.h>
#include <stdio.h>