jstaursky

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

typedef ptrdiff_t ssize_t;
/*******************************************************************************
 * getline -- Stores line of text from stream.                                 *
 *                                                                             *
 * Parameters                                                                  *

jstaursky

#include <stdlib.h>

char*
fgetLine(FILE *stream)
{
    const size_t chunk = 128;
    size_t max = chunk;

    /* Preliminary check */
    if (!stream || feof(stream))

jstaursky

#include <stdio.h>

int main(int argc, char *argv[])
{

    char* Array[2][2] = { { "0th Row, 0th Col", "0th Row, 1st Col"},
                          { "1st Row, 0th Col", "1st Row, 1st Col"}};

    puts (Array[0][0]);
    puts (Array[0][1]);

jstaursky

#include <stdio.h>
#include <stdlib.h> // void exit( int exit_code)
#include <signal.h> // void (*signal( int sig, void (*handler) (int))) (int)

// handler must be of the form  "void func (int sig)"
// signal_code is useful in-cases where handler is used for more than one signal
void handler (int signal_code) 
{
    printf ("\nHello World!\n");
    printf ("signal value: %d\n", signal_code);

jstaursky

#include <stdio.h>

struct fn_struct {
    int number;
    void (*f) (void *);
};

void foo (unsigned int m)
{
    unsigned int tmp = 0;

jstaursky

#include <stdio.h>
#include <stdint.h>   // for fixed width types e.g. uint8_t, etc.
#include <inttypes.h> // for PRI{fmt}{type} and SCN{fmt}{type} macros

int main()
{
    uint32_t num;

    scanf("%"SCNu32, &num);

jstaursky

#!/usr/bin/env perl
use warnings;

while (read STDIN, my $octets, 3) {
    # converts the 3 octal numbers to equivalent decimal number and then said
    # decimal number into its hex equivalent.
    $hex_fmt = sprintf "%02x", oct($octets);
    # print out hex in raw hex byte values.
    print pack("H*", $hex_fmt);
}

jstaursky

// PrintUnicode.c - input ascii utf8 hex value and prints the corresponding unicode
// character.

// example - try the following!
//   echo -n '0xf09f9886' | xargs ./PrintUnicode
//   Or
//   ./PrintUnicode f09f9886

#include <stdio.h>              // sscanf, printf
#include <stdint.h>             // uint32_t, uint8_t

jstaursky

// gcc --static -m32 -fno-stack-protector bufExploits1.c -g -o ex1
// If using gcc on windows, gcc -static-libgcc -bufExploits1.c -m32 -fno-stack-protector -g -o ex1
/*
 * NOTE: Windows 10 will trigger windows defender and quarantine the exe before you can run it.
 *       I kept getting the threat warning for "Trojan:win32/Conteban.B!ml" -- not sure why, guess windows doesn't like stack smashing.
 *       You will need to first restore the exe from windows defender to let windows know this behavior is okay for this program.
 */
#ifdef _WIN32
#include <windows.h>
#endif

jstaursky

#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <inttypes.h>

// gcc Print_data_in_binary.c -o printBinary
//
// ./printBinary 27