#include <stdio.h>#include <dirent.h>#include <stdlib.h>#include <string.h>#include <sys/types.h>#include <sys/stat.h>void dir_oper(char const*path);int main(int argc, char const *argv[]){	char const*path = argv[1];	struct stat s_buf;	/*獲取文件信息，把信息放到s_buf中*/	stat(path,&s_buf);	/*判斷輸入的文件路徑是否目錄，若是目錄，則往下執(zhí)行，分析目錄下的文件*/	if(S_ISDIR(s_buf.st_mode))	{		dir_oper(path);	}	/*若輸入的文件路徑是普通文件，則打印并退出程序*/	else if(S_ISREG(s_buf.st_mode))	{		PRintf("[%s] is a regular file/n",path);		return 0;	}	return 0;}void dir_oper(char const*path){	printf("[%s] it is a dir/n",path);	struct dirent *filename;	struct stat s_buf;	DIR *dp = opendir(path);	/*readdir()必須循環(huán)調(diào)用，要讀完整個(gè)目錄的文件，readdir才會(huì)返回NULL	若未讀完，就讓他循環(huán)*/	while(filename = readdir(dp))	{		/*判斷一個(gè)文件是目錄還是一個(gè)普通文件*/		char file_path[200];		bzero(file_path,200);		strcat(file_path,path);		strcat(file_path,"/");		strcat(file_path,filename->d_name);				/*在linux下每一個(gè)目錄都有隱藏的. 和..目錄，一定要把這兩個(gè)排除掉。因?yàn)闆](méi)有意義且會(huì)導(dǎo)致死循環(huán)*/		if(strcmp(filename->d_name,".")==0||strcmp(filename->d_name,"..")==0)		{			continue;		}		/*獲取文件信息，把信息放到s_buf中*/		stat(file_path,&s_buf);		/*判斷是否目錄*/		if(S_ISDIR(s_buf.st_mode))		{			dir_oper(file_path);			printf("/n");		}		/*判斷是否為普通文件*/		if(S_ISREG(s_buf.st_mode))		{			printf("[%s] is a regular file/n",file_path);		}	}}