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Go, Kubernetes and Open Source enthusiast

Patryk Małek pmalek

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Go, Kubernetes and Open Source enthusiast
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@pmalek
pmalek / install_gcc.sh
Last active January 15, 2019 12:00
gcc installation script for Centos6.6 (probably can be used for other distributions). It also installs dependencies like mpc, mpfr and gmp !NOTE: As of now this only works for installations with PREFIX=/usr/local
#!/bin/bash
LOGFILE=/tmp/gcc_install.log
# $1 - package name
errorIf(){
if [ $? -ne 0 ]; then
echo "Something was wrong with $1"
exit 1
fi
@pmalek
pmalek / results_pypy2.5.1
Created June 1, 2015 19:53
python vs pypy comparison benchmarks using Python 2.7.6 and PyPy 2.5.1
Python 2.7.9 (2.5.1+dfsg-1~ppa1+ubuntu14.04, Mar 27 2015, 19:19:42)
[PyPy 2.5.1 with GCC 4.8.2]
Using arena file:
example_benchmarks/zeros.py
- zeros_imul
- zeros_mul
- zeros_repeat
- zeros_slow
Using benchmark file:
@pmalek
pmalek / main.c
Created June 12, 2015 10:35
Search for palindroms from one file and put it alphabetically in another
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
int is_pal(char* word) {
size_t len = strlen(word);
char* begin = word;
char* end = word + len - 2; // -2 beacuse we get the newline char as well
if (len == 1) {
@pmalek
pmalek / commit-msg.py
Created November 14, 2015 13:04
commit-msg hook checking whether there already exists a commit in git repository with passed in commit message
#!/usr/bin/python
from subprocess import check_output
import sys
class Colors:
HEADER = '\033[95m'
OKBLUE = '\033[94m'
OKGREEN = '\033[92m'
WARNING = '\033[93m'
@pmalek
pmalek / main.sh
Created March 8, 2016 12:10
How to launch wireshark getting data from tcpdump on another machine
mkfifo fifo
wireshark -k -i fifo &
while true; do ssh MACHINE_IP 'tcpdump -s 0 -U -n -w - "! arp && host 10.0.0.1"' > fifo; done
@pmalek
pmalek / main.c
Last active June 13, 2016 13:04
compare version c string like "1.2.10"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
/*
* Function used to compare version c strings like: "1.2.3" or "12.9.1314214"
*/
int compare_versions(char* first, char* second)
{
size_t first_last_dot1 = 0;
@pmalek
pmalek / list.c
Last active May 6, 2016 13:30
single linked list in C
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
typedef struct node
{
int val;
struct node* next;
} node;
@pmalek
pmalek / fib.cpp
Created July 15, 2016 19:34
fibonacci tail recursion
int fib(int term, int val = 1, int prev = 0)
{
if(term == 0) return prev;
if(term == 1) return val;
return fib(term - 1, val+prev, val);
}
@pmalek
pmalek / fib.py
Created July 15, 2016 19:35
python fibonacci
def fib_to(n):
fibs = [0, 1]
for i in range(2, n+1):
fibs.append(fibs[-1] + fibs[-2])
return fibs
@pmalek
pmalek / new_gist_file
Created September 26, 2016 11:12
tcpdump from a remote machine to fifo on local machine and read via wireshark
mkfifo fifo
TCPHOST="10.0.0.1"; while true ; do \
ssh $TCPHOST 'tcpdump -s 0 -U -n -w - "!igmp && !arp && !rarp && !(host 224.0.0.1) && !(port 22) && !(port 67) && !(port 53) && !(port 123) && !(port 5353) && !(port 137)"' > fifo; \
done
# on another console
wireshark -k -i fifo