linux 文件扫描程序

刚刚学习linuxc编程，照着书写的，练习一下。

#include<unistd.h>
#include<stdio.h>
#include<dirent.h>
#include<string.h>
#include<sys/stat.h>
#include<stdlib.h>
void printdir (char *dir,int depth)
{
    DIR *dp;
    struct dirent *entry;
    struct stat statbuf;
    if((dp=opendir(dir))==NULL)
    {
        fprintf(stderr,"cannot open directory: %s\n",dir);
        return;
    }
    chdir(dir);
    while((entry=readdir(dp))!=NULL)
    {
        lstat(entry->d_name,&statbuf);
        if(S_ISDIR(statbuf.st_mode))
        {
            if(strcmp(".",entry->d_name)==0||strcmp("..",entry->d_name)==0)
                continue;
            printf("%*s%s/\n",depth," ",entry->d_name);
            printdir(entry->d_name,depth+4);
        }
        else printf("%*s%s\n",depth," ",entry->d_name);
    }
    chdir("..");
    closedir(dp);
}
int main(int argc,char* argv[])
{
    printf("Directory scan of /home:\n");
    printdir(argv[1],0);
    printf("done.\n");
    exit(0);
}