问题描述
我正在尝试制作一个Linux内核模块，该模块支持打开，关闭，读取和写入操作.所以我想通过struct file_operations注册这些函数，但是在struct中找不到'close'条目.我想我应该使用发布"而不是关闭"，但是我想知道为什么名称是发布"而不是关闭"吗?
I'm trying to make a linux kernel module, which supports open, close, read and write operations.So I want to register these functions via struct file_operations, however I can't find 'close' entry in the struct.I think I should use 'release' instead of 'close', but I wonder why the name is 'release' and not 'close'?
推荐答案
因为文件可能会多次打开，所以当您关闭描述符时，仅在最后一次关闭调用时才对文件的最后引用调用release.因此，关闭和释放之间是有区别的.
Because the file may be opened multiple times, when you close a descriptor, only on the last close call for the last reference to the file invokes release. So there is a difference between close and release.
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