Linux copendir如何实现多线程遍历

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

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

void *process_directory(<span>void *arg)</span> {
    thread_data_t *data = (thread_data_t *)arg;
    <span>struct dirent *entry;</span>
    char full_path[1024];

    while ((entry = readdir(data->dir)) != NULL) {
        if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
            continue;

        snprintf(full_path, sizeof(full_path), "%s/%s", data->path, entry->d_name);

        printf("Thread %ld: %s\n", pthread_self(), full_path);

        // 如果需要递归遍历子目录，可以在这里调用 process_directory() 函数
    }

    closedir(data->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;
    }

    char path[1024];
    snprintf(path, sizeof(path), "%s", argv[1]);

    DIR *dir = opendir(path);
    if (dir == NULL) {
        perror("opendir");
        return 1;
    }

    pthread_t threads[4];
    thread_data_t thread_data[4];

    for (int i = 0; i < 4; ++i) {
        thread_data[i].path = path;
        thread_data[i].dir = dir;

        if (pthread_create(&threads[i], NULL, process_directory, (void *)&thread_data[i]) != 0) {
            perror("pthread_create");
            return 1;
        }
    }

    for (int i = 0; i < 4; ++i) {
        pthread_join(threads[i], NULL);
    }

    closedir(dir);
    return 0;
}