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When you open /dev/ptmx, you get a file descriptor pointing to one of the available MasterPTY's. If none are available, you get an EBUSY. This makes it possible to open multiple (up to 4) Terminals. :^) To support this, I also added a CharacterDevice::open() that gets control when VFS is opening a CharacterDevice. This is useful when we want to return a custom FileDescriptor like we do here.
16 lines
313 B
C++
16 lines
313 B
C++
#include "CharacterDevice.h"
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#include <LibC/errno_numbers.h>
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CharacterDevice::~CharacterDevice()
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{
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}
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RetainPtr<FileDescriptor> CharacterDevice::open(int& error, int options)
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{
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return VFS::the().open(*this, error, options);
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}
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int CharacterDevice::ioctl(Process&, unsigned, unsigned)
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{
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return -ENOTTY;
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}
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