UO Second Age

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

int main(int argc, char *argv[])
{
    char search[] = { 0xC7, 0x44, 0x24, 0x3C, 0xE0, 0x00, 0x01, 0x00 };
    char replace[] = { 0xC7, 0x44, 0x24, 0x3C, 0xE0, 0x80, 0x01, 0x00 };
    long int fsize;
    
    printf("hifi's UO 2D global sound patch <3\n");
    printf("==================================\n");
    
    if (argc < 2) {
        printf("Error: Need a file to patch, drag client.exe to this executable.\n");
        getchar();
        return 0;
    }
    
    printf("Opening %s...\n", argv[1]);
    FILE *fh = fopen(argv[1], "rb+");
    if (!fh) {
        perror("Failed to open file");
        getchar();
        return 0;
    }
    
    fseek(fh, 0, SEEK_END);
    fsize = ftell(fh);
    fseek(fh, 0, SEEK_SET);
    printf("Crawling %ld bytes...\n", fsize);
    
    char *file = malloc(fsize);
    if (fread(file, fsize, 1, fh) != 1) {
        perror("Failed to read file");
        getchar();
        return 0;     
    }
    
    long int i;
    for (i = 0; i < fsize - sizeof(search); i++) {
        if (memcmp(file + i, search, sizeof(search)) == 0) {
            fseek(fh, i, SEEK_SET);
            if (fwrite(replace, sizeof(replace), 1, fh) != 1) {
                perror("Failed to write file");
            } else {
                printf("Patched! You now have global sound enabled!\n");
            }
            fclose(fh);
            
            getchar();
            return 0;
        }
        if (memcmp(file + i, replace, sizeof(replace)) == 0) {
            fseek(fh, i, SEEK_SET);
            if (fwrite(search, sizeof(search), 1, fh) != 1) {
                perror("Failed to write file");
            } else {
                printf("Reverted! Global sound is removed.\n");
            }
            fclose(fh);
            
            getchar();
            return 0;
        }
    }
  
    fclose(fh);
    
    printf("Did not find g-spot :-(\n");
    
    getchar();
    return 0;
}