如何用copendir实现递归目录遍历

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <sys/stat.h>
#include <limits.h>  // for PATH_MAX


void list_directory_contents(const char *path) {
    DIR *dir;
    struct dirent *entry;
    struct stat path_stat;
    char full_path[PATH_MAX];


    dir = opendir(path);
    if (!dir) {
        perror("opendir");
        return;
    }

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

        // 使用 snprintf 避免缓冲区溢出
        if (snprintf(full_path, sizeof(full_path), "%s/%s", path, entry->d_name) >= sizeof(full_path)) {
            fprintf(stderr, "Path too long: %s/%s\n", path, entry->d_name);
            continue;
        }


        if (lstat(full_path, &path_stat) == -1) { // 使用 lstat 处理符号链接
            perror("lstat");
            continue;
        }

        if (S_ISDIR(path_stat.st_mode)) {
            list_directory_contents(full_path);
        } else if (S_ISREG(path_stat.st_mode)) { // 只打印常规文件
            printf("%s\n", full_path);
        } else if (S_ISLNK(path_stat.st_mode)) {
            printf("Symbolic link: %s\n", full_path); // 处理符号链接
        } else {
            printf("Other file type: %s\n", full_path); // 处理其他文件类型
        }
    }

    closedir(dir);
}

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

    list_directory_contents(argv[1]);
    return EXIT_SUCCESS;
}