我可以在stderr中使用CFPropertyListWriteToStream吗？

Question

我想使用CFPropertyListWriteToStream写信给stderr。如果我输入stderr作为参数，我会收到错误：

error: cannot convert ‘FILE*’ to ‘__CFWriteStream*’ for argument ‘2’ to ‘CFIndex CFPropertyListWriteToStream

如何创建一个写入CFWriteStream的{​​{1}}对象？

Answer 1

你可以使用我找到的技术here：

  CFWriteStreamRef stdoutStream = NULL;
  if (verbose) {
    CFURLRef devStdout =
      CFURLCreateWithFileSystemPath(NULL, CFSTR("/dev/stderr"),
                    kCFURLPOSIXPathStyle, false);
    stdoutStream = CFWriteStreamCreateWithFile(NULL, devStdout);
    if (stdoutStream == NULL)
      errexit("cannot create CFWriteStream for /dev/stderr");
    if (!CFWriteStreamOpen(stdoutStream))
      errexit("cannot open CFWriteStream for /dev/stderr");
  }