text: #ifndef _GETOPT_H
  #define _GETOPT_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  int getopt(int, char * const [], const char *);
  extern char *optarg;
  extern int optind, opterr, optopt, optreset;
  
  struct option {
  	const char *name;
  	int has_arg;
  	int *flag;
  	int val;
  };
  
  int getopt_long(int, char *const *, const char *, const struct option *, int *);
  int getopt_long_only(int, char *const *, const char *, const struct option *, int *);
  
  #define no_argument        0
  #define required_argument  1
  #define optional_argument  2
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif
  