Forward an invocation of a variadic function in C

Question

In C, is it possible to forward the invocation of a variadic function? As in,

int my_printf(char *fmt, ...) {
    fprintf(stderr, \"Calling printf with fmt %         


        

Answer 1

Use vfprintf:

int my_printf(char *fmt, ...) {
    va_list va;
    int ret;

    va_start(va, fmt);
    ret = vfprintf(stderr, fmt, va);
    va_end(va);
    return ret;
}