extern char *mystrsep(char **ptr, char *s);
extern char *trim(char *s);
-extern char *strncpyz(char *dst, const char *src, size_t n);
extern int vsnprintfz(char *dst, size_t n, const char *fmt, va_list args);
extern int snprintfz(char *dst, size_t n, const char *fmt, ...) PRINTFLIKE(3, 4);