vsnprintf_ss
l = vsnprintf_ss(buf, sizeof(buf), fmt, ap);
int vsnprintf_ss(char *restrict, size_t, const char * __restrict, __va_list)
vsnprintf_ss,
ret = vsnprintf_ss(str, n, fmt, ap);
__weak_alias(vsnprintf_ss,_vsnprintf_ss)
vsnprintf_ss(buf2, sizeof(buf2), msg, ap);
const int n = vsnprintf_ss(&buf[strlen(buf)], (sizeof(buf) -
int vsnprintf_ss(char *restrict, size_t, const char *restrict, va_list)
int vsnprintf_ss(char *restrict, size_t, const char *restrict, va_list)