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https://github.com/RGBCube/serenity
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08cd75ac4b
After reading a bunch of POSIX specs, I've learned that a file descriptor is the number that refers to a file description, not the description itself. So this patch renames FileDescriptor to FileDescription, and Process now has FileDescription* file_description(int fd).
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
#pragma once
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// Device is the base class of everything that lives in the /dev directory.
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//
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// All Devices will automatically register with the VFS.
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// To expose a Device to the filesystem, simply pass two unique numbers to the constructor,
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// and then mknod a file in /dev with those numbers.
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//
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// There are two main subclasses:
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// - BlockDevice (random access)
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// - CharacterDevice (sequential)
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#include <Kernel/File.h>
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#include <Kernel/UnixTypes.h>
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class Device : public File {
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public:
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virtual ~Device() override;
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unsigned major() const { return m_major; }
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unsigned minor() const { return m_minor; }
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virtual String absolute_path(const FileDescription&) const override;
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uid_t uid() const { return m_uid; }
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uid_t gid() const { return m_gid; }
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virtual bool is_device() const override { return true; }
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protected:
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Device(unsigned major, unsigned minor);
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void set_uid(uid_t uid) { m_uid = uid; }
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void set_gid(gid_t gid) { m_gid = gid; }
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private:
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unsigned m_major { 0 };
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unsigned m_minor { 0 };
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uid_t m_uid { 0 };
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gid_t m_gid { 0 };
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};
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