一个目录扫描程序

扫描/tmp目录下的文件和子目录：

 

#include
#include
#include
#include
#include
#include

// int mkdir(const char *path,mode_t mode);

void printdir(char *dir,int depth)
{
 DIR *dp; 

//int closedir(DIR *dirp);
 struct dirent *entry;   

//  struct   dirent   {  
//  long d_ino;  
//  __kernel_off_t d_off;  
//  unsigned   short d_reclen;   
// char d_name[256];   /*   We   must   not   include   limits.h!   */  
//  };

 struct stat statbuf;

//int lstat(const char *path,struct stat *buf);
 
 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))
  {
  /* Found a directory,but ignore . and .. */
  if(strcmp(".",entry->d_name) == 0 || strcmp("..",entry->d_name) == 0)
  continue;
  printf("%*s%s/\n",depth,"",entry->d_name);
  /* Recurse at a new indent level */
  printdir(entry->d_name,depth+4);
  }
  else
  printf("%*s%s\n",depth,"",entry->d_name);
 }
 chdir("..");
 closedir(dp);
}

int main()
{

// mkdir("/root/senlin",0777);
// chdir("/usr");
// printf("Now the directory is %s\n",getcwd(NULL,NULL));
// rmdir("/root/senlin");
 printf("Directory scan of /tmp:\n");
 printdir("/tmp",0);
 printf("Done\n");
 
 exit(0);
}

 

 

 

 

变成一个更有用的目录浏览程序：

int main()
{
 char *topdir = ".";
 if (argc >= 2)
  topdir=argv[1];
  
 printf("Directory scan of %s\n",topdir);
 printdir(topdir,0);
 printf("Done\n");
 
 exit(0);
}