在C中强制退出时释放所有打开的文件和目录
我想强制释放我的程序在执行期间打开的所有打开的文件和目录。我想这样做是因为我有一个非常大的程序，它打开了许多我无法跟踪的文件和目录。有什么办法可以做到吗？意味着我想检索所有打开的文件和目录的列表并在退出时关闭它们。
我知道使用 atexit() 函数注册退出处理程序。可以用它来做点什么吗？
编辑： 我在windows上有cygwin。我想做上述事情，因为我的程序的资源没有被自动释放。我有一个创建的目录，然后使用 opendir() 打开。我的程序完成后，当我尝试删除该目录时，它显示“无法删除，正在被另一个程序使用”。但是当我终止 explorer.exe 并再次重新启动时，只有我才能删除该目录。
问题是它的发生不均匀。我可以删除某些目录，但无法删除某些目录。
I want to release all open files and directories forecefully my program has opened during its execution. I want to do this because I have a very big program and it opens many files and directories which I am not able to keep track. Is there any way to do it? means I want to retrieve a list of all open files and directories and close them at exit.
I know registration of exit handlers using atexit() function. Can something be done with it?
Edit:
I have cygwin on windows. I want to do the above thing because my program's resources are not being automatically released. I have a directory which is created and then opened using opendir(). After my program finishes, when I try to delete that directory, it says "cant delete, being used by another program". But when I terminate explorer.exe and again restart, then only I am able to delete that directory.
The problem is it is happening unevenly. I am able to delete some directories and not able to delete some.
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如果“释放”的意思是“关闭”，那么无论如何都会发生。 C 运行时和操作系统会为您处理这些事情。进程终止时，进程打开的所有资源都将被关闭。如果没有这样做，那将是一个非常罕见（且质量很差）的环境。
If by "release" you mean "close", that will happen anyway. The C runtime and the operating system will take care of that for you. On process termination all resources the process had open will be closed off. It would be a very rare (and poor quality) environment that didn't do that.
另请检查 _fcloseall()
Also check _fcloseall()
man signal应该会给你一些提示。这捕获了大部分终止信号，而不仅仅是正常的信号。man signalshould give you some hints. This catches most of termination signals, not only normal ones.