如何用copendir实现多线程目录遍历

#<span>include <stdio.h></span>
#<span>include <stdlib.h></span>
#<span>include <string.h></span>
#<span>include <dirent.h></span>
#<span>include <pthread.h></span>

#<span>define MAX_THREADS 10</span>

typedef <span>struct {</span>
    char *path;
} thread_data_t;

void *traverse_directory(<span>void *arg)</span> {
    thread_data_t *data = (thread_data_t *)arg;
    DIR *dir = opendir(data->path);
    <span>struct dirent *entry;</span>

    if (dir == NULL) {
        perror("opendir");
        pthread_exit(NULL);
    }

    while ((entry = readdir(dir)) != NULL) {
        if (entry->d_type == DT_DIR && strcmp(entry->d_name, ".") != 0 && strcmp(entry->d_name, "..") != 0) {
            char sub_path[1024];
            snprintf(sub_path, sizeof(sub_path), "%s/%s", data->path, entry->d_name);
            pthread_t thread;
            thread_data_t sub_data = {sub_path};

            pthread_create(&thread, NULL, traverse_directory, (void *)&sub_data);
            pthread_join(thread, NULL);
        }
    }

    closedir(dir);
    pthread_exit(NULL);
}

int main(<span>int argc, char *argv[])</span> {
    if (argc != 2) {
        fprintf(stderr, "Usage: %s <directory>\n", argv[0]);
        return 1;
    }

    pthread_t main_thread;
    thread_data_t main_data = {argv[1]};

    pthread_create(&main_thread, NULL, traverse_directory, (void *)&main_data);
    pthread_join(main_thread, NULL);

    return 0;
}