#include <dirent.h>
#include <errno.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>

int RemoveProgram(const char *rdir);//10
int main(int argc, char *argv[]){
 if(argc!=2){
  fprintf(stderr, "Usage: %s directory_name\\n", argv[0]);
  return 1;
 }
  RemoveProgram(argv[1]);
 }
int RemoveProgram(const char *rdir)
{
 struct dirent *direntp;  //20
 DIR *dirp;
 
 if((dirp=opendir(rdir)) == NULL)
 {
 perror("Failed to open directory");
 return 1;
 }
 
 while((direntp = readdir(dirp)) != NULL)
  if(direntp->d_name == NULL){ //30
   unlink(rdir);}
  else{
   RemoveProgram(rdir);
   break;
   rmdir(rdir);
      } 
 while((closedir(dirp)==-1) && (errno == EINTR));
 return 0;
}

        디렉토리, 파일삭제 코딩한거임

Failed to  open directory : too many opens files