#include	<stdio.h>
#include	<stdlib.h>
#include	<unistd.h>
#include	<dirent.h>
#include 	<sys/stat.h>
#define MAXDIRPATH 8192

void recdir(int);
main(int argc,char *argv[])
{
  int    level=0;
  int    i;
/*
	char	buff[256];
	printf("Enter directory name ");
	gets(buff);
*/
  if (argc != 2) {
    fprintf(stderr,"Usage: %s directory-name \n",argv[0]);
    exit(1);
  }
  chdir(argv[1]);
  recdir(level);
}

void myprintf(char *s, int level, char *ss)
{
 int i;

 for(i=0;i<level*2;i++)
  printf(" ");
 printf(s,level,ss);
}

void recdir(int level) 
{
 int   i;
 char  cur[MAXDIRPATH];
 DIR  *dirp;
 struct dirent *dptr;
 char *buff; 
 struct stat  dstat;

 level++;
 getcwd(cur,MAXDIRPATH);
 if ( (dirp=opendir(".")) == NULL) {
  fprintf(stderr,"Error: Cannot read directory %s\n",cur);
  perror("recdir");
  return;
 }
 while ((dptr=readdir(dirp)) ){
   if (stat(dptr->d_name,&dstat)== -1) {
      perror("stat:");
      continue;
   }
   if (strcmp(dptr->d_name,".")== 0) {
     myprintf("%2d: CDIR: %s\n",level,dptr->d_name);
     continue;
   }
   if (strcmp(dptr->d_name,"..")== 0) {
     myprintf("%2d: PDIR: %s\n",level,dptr->d_name);
     continue;
   }
   if (S_ISDIR(dstat.st_mode) != 0) {
     if ( -1 == chdir(dptr->d_name)) {
       perror("recdir:chdir: Cannot chdir");
       continue;
     };
     myprintf("%2d: DIR : %s\n",level,dptr->d_name);
     recdir(level);
     if (-1 == chdir("..") ){
       perror("recdir: can't cd .. ");
       exit(1);
     }
   }
   if (S_ISREG(dstat.st_mode) != 0) {
     myprintf("%2d: FILE: %s\n",level,dptr->d_name);
   }
 }
 closedir(dirp);
}