Dirwalker: .avi

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <string.h>
#include <sys/stat.h>
#include <stdlib.h>

int ifAvi(const char * filePath);
int getSize(const char * filePath);
int ifSame(const char * firsFilePath, const char * secondFilePath);
void aviCount(const char * dir,  int * aviAmount);
void getAviPathes(const char * dir,  char ** aviPathes, int * num);


//C:/Users/m video/Desktop/videos
int main(){
    char startDir[PATH_MAX+1], finishDir[PATH_MAX+1];

    gets(startDir);
    gets(finishDir);

    strcat(finishDir, "/");
    strcat(finishDir, "avis");

    mkdir(finishDir);

    int aviAmount = 0;
    aviCount(startDir, &aviAmount);

    char *aviPathes[aviAmount];
    for(int i = 0; i < aviAmount; i++)
        aviPathes[i] = (char*)malloc(sizeof(char)*(PATH_MAX + 1));
    int num = 0;
    getAviPathes(startDir, aviPathes, &num);

    printf("-------------------------\n");

    //for(int i = 0; i < aviAmount; i++)
        //printf("%s\n", aviPathes[i]);

    int count = 1;
    for(int i = 0; i < aviAmount - 1; i++){
        for(int j = i + 1; j < aviAmount; j++){
            if(ifSame(aviPathes[i], aviPathes[j]) != 1) continue;
            char newPath[PATH_MAX + 1];
            char number[5];
            strcpy(newPath, finishDir);
            strcat(newPath, "/map_");
            if(count > 9 && count < 100) strcat(newPath, "0");
            if(count < 10) strcat(newPath, "00");
            strcat(newPath, itoa(count, number, 10));
            strcat(newPath, ".avi");
            printf("OLDPATH: %s\nNEWPATH: %s\n", aviPathes[i], newPath);
            rename(aviPathes[i], newPath);
            count++;
        }
    }

    return 0;
}
//C:/Users/m video/Desktop/videos
int getSize(const char * filePath){
    int size;

    FILE * f = fopen(filePath, "r");
    if(!f) return -1;

    fseek(f, 0L, SEEK_END);
    size = ftell(f);

    fclose(f);
    return size;
}
//C:/Users/m video/Desktop/videos
int ifAvi(const char * filePath){
    FILE * f = fopen(filePath, "rb");
    if(!f) return -1;

    char buf[13];
    size_t result = fread(buf, 1, 12, f);

    if(result < 12) {
        fclose(f);
        return 0;
    }

    if(buf[0] != 'R') {
        fclose(f);
        return 0;
    }
    if(buf[1] != 'I') {
        fclose(f);
        return 0;
    }
    if(buf[2] != 'F') {
        fclose(f);
        return 0;
    }
    if(buf[3] != 'F') {
        fclose(f);
        return 0;
    }
    if(buf[8] != 'A') {
        fclose(f);
        return 0;
    }
    if(buf[9] != 'V') {
        fclose(f);
        return 0;
    }
    if(buf[10] != 'I') {
        fclose(f);
        return 0;
    }
    fclose(f);
    return 1;
}
//C:/Users/m video/Desktop/videos
int ifSame(const char * firsFilePath, const char * secondFilePath){
    FILE * fisrtFile = fopen(firsFilePath, "r");
    if(!fisrtFile) return -1;

    FILE * secondFile = fopen(secondFilePath, "r");
    if(!secondFile) {
        fclose(fisrtFile);
        return -1;
    }

    int firstFileSize = getSize(firsFilePath);
    int secondFileSize = getSize(secondFilePath);
    char first;
    char second;

    if(firstFileSize != secondFileSize) {
        fclose(fisrtFile);
        fclose(secondFile);
        return 0;
    }

    for(int i; i<firstFileSize; i++){
        first = fgetc(fisrtFile);
        second = fgetc(secondFile);
        if(first!=second) {
            fclose(fisrtFile);
            fclose(secondFile);
            return 0;
        }
    }
    fclose(fisrtFile);
    fclose(secondFile);
    return 1;
}
//C:/Users/m video/Desktop/videos
void aviCount(const char * dir, int * aviAmount){
    DIR *dp;
    if((dp = opendir(dir)) == NULL) {
        printf("cannot open directory\n");
        return;
    }

    char currentPath[PATH_MAX+1];

    struct dirent *entry;
    struct stat statbuf;

    chdir(dir);
    while((entry = readdir(dp)) != NULL) {

        strcpy(currentPath, dir);
        strcat(currentPath, "/");
        strcat(currentPath, entry->d_name);

        stat(entry->d_name,&statbuf);
        if(S_ISDIR(statbuf.st_mode)) {
            if(strcmp(".",entry->d_name) == 0 || strcmp("..",entry->d_name) == 0 || strcmp("avis",entry->d_name) == 0)
                continue;
            aviCount(currentPath, aviAmount);
            continue;
        }
        if(ifAvi(currentPath) == 1) *(aviAmount) = *(aviAmount) + 1;
    }
    chdir("..");
    closedir(dp);
}
void getAviPathes(const char * dir, char ** aviPathes, int * num){
    DIR *dp;
    if((dp = opendir(dir)) == NULL) {
        printf("cannot open directory\n");
        return;
    }

    char currentPath[PATH_MAX+1];

    struct dirent *entry;
    struct stat statbuf;

    chdir(dir);
    while((entry = readdir(dp)) != NULL) {

        strcpy(currentPath, dir);
        strcat(currentPath, "/");
        strcat(currentPath, entry->d_name);

        stat(entry->d_name,&statbuf);
        if(S_ISDIR(statbuf.st_mode)) {
            if(strcmp(".",entry->d_name) == 0 || strcmp("..",entry->d_name) == 0 || strcmp("avis",entry->d_name) == 0)
                continue;
            getAviPathes(currentPath, aviPathes, num);
            continue;
        }

        if(ifAvi(currentPath) == 1){
            strcpy(aviPathes[(*num)],currentPath);
            (*num) = (*num) + 1;
        }
    }
    chdir("..");
    closedir(dp);
}