Commit Graph

5 Commits

Author SHA1 Message Date
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
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