DirectoryScanner.c

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

/**
 * @brief Function to recursively scan a directory and print the file names and the number of hard links
 *
 * @param dir_name The directory to scan
 */
void scan_directory(const char* dir_name) {
    DIR* dir = opendir(dir_name);
    struct dirent* entry;
    struct stat statbuf;
    char path[1024];

    // If the directory cannot be opened, then print an error message and return
    if (dir == NULL) {
        printf("Cannot open directory: %s\n", dir_name);
        return;
    }

    while ((entry = readdir(dir)) != NULL) {
        // Compare (If the directory names are . for the current directory or .. for the parent directory), then continue
        if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
            continue;

        // Create a path to the file
        snprintf(path, sizeof(path), "%s/%s", dir_name, entry->d_name);

        // Get the file information
        if (lstat(path, &statbuf) == -1) {
            // If you are unable to get the file information, then print an error message and continue
            perror("lstat error");
            continue;
        }

        // If the file is a regular file and has more than one hard link, then print the file name and the number of hard links
        if (S_ISREG(statbuf.st_mode) && statbuf.st_nlink >= 2) {
            printf("File: %s has %ld hard links\n", path, statbuf.st_nlink);
            // Code to list all file names that point to this file
        }
        // If the file is a directory, then recursively call the scan_directory function
        else if (S_ISDIR(statbuf.st_mode)) {
            scan_directory(path);
        }
    }

    // Close the directory
    closedir(dir);
}

/**
 * @brief Main function to call the scan_directory function
 *
 * @return int EXIT_SUCCESS on exit
 */
int main() {
    // Call the scan_directory function to scan the current directory
    scan_directory("/");
    return 0;
}