问题描述
如何使用C编程语言写入硬盘上的任何块？
How can I write to any block on my HDD using the C programming language?
有的问题但它并没有涵盖C方面那么多。
There was a question about writing the MBR but it didn't cover the C aspects that much.
由于文件描述符 - 如文所说 - 对于文件，我想在这里没有办法使用它们案件。包括在C标准库中也使用filedescriptors实现。
Since filedescriptors are - as the word says - for files, I guess there is no way to use them in this case. The Low-level I/O included in the C standard library is also implemented with filedescriptors.
更精确地说：
这个问题是相当的关于写入硬盘块而不是文件（独立于操作系统）。
To put it more precisely:
This question is rather about writing HDD blocks than files (OS independent).
上述问题的答案基本上建议使用（coreutils）。这就是为什么我要在C中寻求一种方式。也许是bootloaders（）并启动扇区病毒使用不同的技术？
The answers to the question mentioned above basically suggested using dd (coreutils) on UNIX-Systems. This is why I am asking for a way in C. Maybe bootloaders (GRUB) and boot sector viruses use different techniques?
我想改变文件描述符内部的实际指针是不合法的。
I guess changing the actual pointer inside of a filedescriptor is not a legitimate way.
问题和限制：
我知道有些方面需要牢记，例如
Problems and limitations:
I know that there are certain aspects to keep in mind, such as
- 某些操作系统限制对卷的直接访问（例如Windows）
- 编写错误以及将错误的数据写入某些块
可能会导致文件系统损坏（丢失硬盘上的数据）。 - 防病毒软件可能会将其标记为可疑代码。
这个问题更具理论性。
推荐答案
C语言可以访问功能的文件fopen / fclose / fread / fwrite 等但是没有这样的东西语言中的阻止设备（就此而言，甚至不是设备）。
The C language has access to files with functions fopen/fclose/fread/fwrite etc. But there is no such thing as a block device in the language (not even a device, for that matter).
POSIX另一方面具有低级函数打开/关闭/读/写来访问文件，并具有块设备的概念。只要您遵循一些简单的规则（主要是块对齐）并且您知道设备的名称（可以可以（小心）用于块设备> / dev / xxx ）。
POSIX on the other hand has the low level functions open/close/read/write to access to files, and have the concept of block device. These functions can be used (with care) for a block device, as long as you follow a few simple rules (block alignment, mainly) and you know the name of your device (/dev/xxx).
如果您在非POSIX系统（如Windows）中，则操作系统将具有特定的处理块设备访问的方法。例如，在Windows中，您可以使用 CreateFile 函数，设备名称为 \\.\PhysicalDrive0 ， \\.\C：等。
If you are in a non-POSIX system, such as Windows, then the OS will have a specific way to handle the block device access. In Windows, for example, you can use the CreateFile function with the device name \\.\PhysicalDrive0, \\.\C: or such.
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