FergusInLondon

/* Fergus In London - https://fergus.london - <fergus@fergus.london>
 *
 * Simple little function for calculating rolling averages, both simple and
 *  weighted. Example can be found on the GitHub Gist, or on my website.
 *
 * Do as you please, no rights reserved and no warranties provided. :)
 */


/**

FergusInLondon

/* Fergus In London - https://fergus.london - <fergus@fergus.london>
 *
 * Simple little function for calculating rolling averages, both simple and
 *  weighted. Example can be found on the GitHub Gist, or on my website.
 *
 * Do as you please, no rights reserved and no warranties provided. :)
 */


 

FergusInLondon

/**
 * Simple little event registry built around the worlds most simplistic
 *  linked list implementation. Allows you to register a function (void())
 *  against a integer value, and provides a mechanism for triggering the
 *  associated functions for an integer.
 *
 * Not a great deal of use beyond those fun little weekend Arduino type
 *  projects.
 *
 * @see example.c

FergusInLondon

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

#define FIRST_SIX_INDEX   (buf[0] & 0xfc) >> 2
#define SECOND_SIX_INDEX ((buf[0] & 0x03) << 4) + ((buf[1] & 0xf0) >> 4)
#define THIRD_SIX_INDEX  ((buf[1] & 0x0f) << 2) + ((buf[2] & 0xc0) >> 6)
#define FOURTH_SIX_INDEX   buf[2] & 0x3f


char base64_map[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

FergusInLondon

/**
 * shuffle(array[]) - Shuffles an array via a simplistic
 *  algo, not too dissimilar to Fisher-Yates.
 *
 * Ignore the -ahem- "clever" variable swapping one-liner,
 *  that's all it does.
 *
 * @param array
 * @return array
 */

FergusInLondon

/* filesnooper.c - Fergus In London <fergus@fergus.london>
 *
 * Similar to snoopy.c, wrote to scratch an itch and demonstrate how LD_PRELOAD
 *  can be used for injecting code and/or hooking/wrapping around function calls.
 *
 * This is actually a good example, because if you try and use it with different
 *  ways of writing files, you'll see that to actually do this effectively you'd
 *  need to examine the target binary with strace, and potentially implement
 *  signatures from other libraries. (i.e a binary calling fprintf() may not be
 *  be effected by this.)

FergusInLondon

/**
 * snoopy.c - Snoop on another tasks memory.
 *  Fergus In London <fergus@fergus.london>
 *
 * This is a pretty basic demo of the process_vm_readv syscall, a syscall which
 *  provides a nicer interface than ptrace for accessing memory used by another
 *  task.
 *
 * To play with simply use `ps` to get a PID for the process you'd like to snoop
 *  on, and `pmap` for the relevant memory address.

FergusInLondon

### Keybase proof

I hereby claim:

  * I am fergusinlondon on github.
  * I am fergusinlondon (https://keybase.io/fergusinlondon) on keybase.
  * I have a public key ASAZUkUuHB0BhpbpaL2yBsfar2Rj2ATeaS2RfjJMaiFkpQo

To claim this, I am signing this object: