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> Of course, this is meaningless, as you can't actually do any common operation, except maybe Close*, on all of them. You can write and read on anything on Uni
by marcosdumay 1y ago
> Of course, this is meaningless, as you can't actually do any common operation, except maybe Close*, on all of them.
You can write and read on anything on Unix that "is a file". You can't open or close all of them.
Annoyingly, files come in 2 flavors, and you are supposed to optimize your reads and writes differently.
- tsimionescu 1y agoYou can call write() and read() on any file descriptor, but it won't necessarily do something meaningful. For example, calling them on a socket in listen mode won't do anything meaningful. And many special files don't implement at least one of read or write - for example, reading or writing to many of the special files in /proc/fs doesn't do anything.
- dwattttt 1y agoYou can try to read/write the same on Windows: ReadFile (and friends) take a HANDLE. It won't make sense to try to read from all things you can get a HANDLE to on Windows either, but it's up to what created the HANDLE/object as to what operations are valid. https://learn.microsoft.com/en-us/windows/win32/sysinfo/kernel-objects https://learn.microsoft.com/en-us/windows/win32/sysinfo/kern...