source: azure_iot_hub/trunk/musl-1.1.18/src/stdio/vdprintf.c@ 388

#include "stdio_impl.h"

static size_t wrap_write(FILE *f, const unsigned char *buf, size_t len)
{
        return __stdio_write(f, buf, len);
}

int vdprintf(int fd, const char *restrict fmt, va_list ap)
{
        FILE f = {
                .fd = fd, .lbf = EOF, .write = wrap_write,
                .buf = (void *)fmt, .buf_size = 0,
                .lock = -1
        };
        return vfprintf(&f, fmt, ap);
}