extern int unzip(FILE *l_in_file, FILE *l_out_file);
extern void gz_close(int gunzip_pid);
extern FILE *gz_open(FILE *compressed_file, int *pid);
+extern void gzvclose(int gunzip_pid);
+extern FILE *gzvopen(FILE *compressed_file, int *pid);
extern struct hostent *xgethostbyname(const char *name);
extern int create_icmp_socket(void);