vsnprintf
vsnprintf(char *str, size_t size, const char *format, va_list args)
vsnprintf (char *str, size_t count, const char *fmt, va_list args)
#define vsnprintf(str, len, fmt, ap) __extension__ ({ \
#undef vsnprintf
#undef vsnprintf
#undef vsnprintf
#undef vsnprintf
#undef vsnprintf /* _FORTIFY_SOURCE */
vsnprintf(char * __restrict str, size_t n, const char * __restrict fmt,
#define vsnprintf vsnprintf_unbound
vsnprintf(char *buf, size_t size, const char *cfmt, va_list ap)
vsnprintf(char *str, size_t sz, const char *fmt, va_list ap)
vsnprintf(char *str, size_t size, const char *format, va_list ap)