例子

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>

int main(int argc,char *argv[])
{
        struct stat filestat;
        if(argc!=2)
        {
                printf("Usage ./a.out argv1＼n");
                exit(-1);
        }
        if(stat(argv[1],&filestat)!=0)
        {
                perror(argv[1]);
                return -1;
        }
        if(S_ISDIR(filestat.st_mode))
                printf("%s is dir ＼n",argv[1]);
        else
                printf("%s is not dir＼n",argv[1]);
}