gdb: close

 
 close
 .....
 
 Synopsis:
           int close(int fd);
 
 Request:
      'Fclose,FD'
 
 Return value:
      'close' returns zero on success, or -1 if an error occurred.
 
 Errors:
 
      'EBADF'
           FD isn't a valid open file descriptor.
 
      'EINTR'
           The call was interrupted by the user.