starzia

# reads netids from stdin and prints email addresses to stdout                                            
# see http://ldap3.readthedocs.io/tutorial_searches.html                                                  
# and https://www.it.northwestern.edu/bin/docs/CentralAuthenticationServicesThroughLDAP.pdf    
# 
# prereq: pip install ldap3
# usage: echo [email protected] | python netid_lookup.py

from ldap3 import Server, Connection, ALL, ALL_ATTRIBUTES
import sys

starzia

#include "types.h"
#include "stat.h"
#include "user.h"

void run(void* id) {
  printf(1, "hello\n");
  volatile int i;
  for(i=0; i<100000000; i++);
  printf(1, "Child %d done\n", *(int*)id);
}

starzia

#include <stdio.h>
#include <pthread.h>

static volatile char* person1;
static volatile char* person2;
static const int LOOPS = 1e4;

void* mythread(void* arg) {
  printf("%s: begin\n", (char*)arg);
  int i;

starzia

#include <stdio.h>
#include <pthread.h>

static volatile int counter = 0;
static const int LOOPS = 1e7;

void* mythread(void* arg) {
  printf("%s: begin\n", (char*)arg);
  int i;
  for (i=0; i<LOOPS; i++) {

starzia

# Sends a TCP DNS request in two packets.
# First sends the message size, then sends the message.
# This behavior is similar to that of the Windows nslookup command.
import socket, binascii, sys, struct

def main(dns_server):
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    # disable Nagle's algorithm, to allow request to be sent in two pieces.
    s.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, True)
    s.connect((dns_server, 53))

starzia

#!/bin/bash                                                                     
# Converts all ogg files in the current path to mp3 files.
# This is useful for moving a music libary to iTunes, which doesn't support ogg
find .|grep 'ogg$' > /tmp/ogg_files.txt
while read line; do
    basepath=$(echo $line | sed 's/.ogg$//g')
    echo $basepath

    # get as much id3 tag information as possible from the path                 
    trackAndSong=$(basename "$basepath")

starzia

#!/bin/bash

# Parallelization functions

# Maximum number of processes to run in parallel.
# A good value for this is one fewer than the number of cores available
NP=14

# wait until fewer jobs are running than number of processors
function queue {

starzia

#!/bin/bash
# Implements GNU seq functionality. 
# Useful on IBM AIX systems which don't have GNU coreutils.

if [ -z "$3" ]; then
    # if no third arg
    incr=1
    j=$2
else
    incr=$2