Andreas Kling
b896d4b237
PTY: Disallow infinite writing to slaves.
...
This way we don't buffer ungodly amounts of output in the kernel when doing
e.g "cat /dev/random" on a PTY.
2019-01-25 00:13:54 +01:00
Andreas Kling
754037874c
Move VFS sources into Kernel/.
2019-01-23 05:14:00 +01:00
Andreas Kling
e6fc84e234
Kernel: Make /proc/PID/fds display something useful for character devices.
2019-01-21 02:33:01 +01:00
Andreas Kling
9dd29f9aa9
Add a PTY multiplexer (/dev/ptmx) device.
...
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.
2019-01-16 13:39:32 +01:00
Andreas Kling
310a5f4199
Let each MasterPTY create its slave.
2019-01-16 02:11:50 +01:00
Andreas Kling
bd3e77cc16
Pass the process to CharacterDevice::read/write.
...
This is much nicer than grabbing directly at 'current' inside a read().
2019-01-16 00:20:38 +01:00
Andreas Kling
08bfe518f9
Rename CharacterDevice::has_data_available_for_reading() -> can_read().
2019-01-16 00:10:13 +01:00
Andreas Kling
e452303c66
Allow character devices to block write attempts until there is more space.
2019-01-15 09:17:22 +01:00
Andreas Kling
2f74c2f430
Add basic PTY support.
...
For now, there are four hard-coded PTYs: /dev/pt{m,s}[0123]
Use this in the Terminal to open a pty pair and spawn a shell.
2019-01-15 06:30:19 +01:00
