#include "stdio_impl.h" int vdprintf(int fd, const char *fmt, va_list ap) { int r; char buf[BUFSIZ]; FILE f = { .fd = fd, .lbf = EOF, .write = __stdio_write, .buf = buf+UNGET, .buf_size = sizeof buf - UNGET }; r = vfprintf(&f, fmt, ap); __oflow(&f); return r; }