readdir如何处理大文件和子目录

<code>#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <string.h>
#include <sys>

void process_directory(const char *path) {
    DIR *dir = opendir(path);
    if (dir == NULL) {
        perror("opendir");
        return;
    }

    struct dirent *entry;
    while ((entry = readdir(dir)) != NULL) {
        // 跳过当前目录与上级目录的特殊条目
        if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) {
            continue;
        }

        // 拼接完整路径名
        char full_path[PATH_MAX];
        snprintf(full_path, sizeof(full_path), "%s/%s", path, entry->d_name);

        // 获取文件属性信息
        struct stat statbuf;
        if (stat(full_path, &statbuf) == -1) {
            perror("stat");
            continue;
        }

        // 如果是目录类型，则递归处理
        if (S_ISDIR(statbuf.st_mode)) {
            process_directory(full_path);
        } else {
            // 处理文件（例如输出文件路径）
            printf("%s\n", full_path);
        }
    }

    closedir(dir);
}

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

    process_directory(argv[1]);
    return 0;
}
</directory></sys></stdlib.h></dirent.h></string.h></stdio.h></code>