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Add a /dev/pts filesystem and make PTY allocation dynamic.

Browse source 
You can now open as many PTY pairs as you like. Well, it's actually capped
at 8 for now, but it's just a constant and trivial to change.

Unregistering a PTY pair is untested because I didn't want to start
mucking with that in Terminal right now.
This commit is contained in:
Andreas Kling 2019-01-30 00:49:20 +01:00
parent c30e2c8d44
commit e9b948103d
12 changed files with 124 additions and 20 deletions
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29
Kernel/DevPtsFS.h Normal file
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#pragma once
#include "SlavePTY.h"
#include <AK/Types.h>
#include <Kernel/SyntheticFileSystem.h>
class Process;
class DevPtsFS final : public SynthFS {
public:
static DevPtsFS& the() PURE;
virtual ~DevPtsFS() override;
static RetainPtr<DevPtsFS> create();
virtual bool initialize() override;
virtual const char* class_name() const override;
void register_slave_pty(SlavePTY&);
void unregister_slave_pty(SlavePTY&);
private:
DevPtsFS();
RetainPtr<SynthFSInode> create_slave_pty_device_file(unsigned index);
HashTable<SlavePTY*> m_slave_ptys;
};