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Hook this up in Terminal so that the '\a' character generates a beep.
Finally emit an '\a' character in the shell line editing code when
backspacing at the start of the line.
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We then use this immediately in the WindowServer/LibGUI communication in
order to send both message + optional "extra data" with a single syscall.
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Since these syscalls don't return to caller, we have to emit the trace
events manually.
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Calling systrace(pid) gives you a file descriptor with a stream of the
syscalls made by a peer process. The process must be owned by the same
UID who calls systrace(). :^)
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Added a simple syscall counter to the /proc/all contents. :^)
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Specifically shm_open() and shm_unlink(). This patch just adds stubs.
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We can't have multiple threads in the same process running in the kernel
at the same time, so let's have a per-process lock that threads have to
acquire on syscall entry/exit (and yield while blocked.)
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It's basically a userspace port of the kernel's Lock class.
Added gettid() and donate() syscalls to support the timeslice donation
feature we already enjoyed in the kernel.
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It takes two parameters, a function pointer for the entry function,
and a void* argument to be passed to that function on the new thread.
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The scheduler now operates on threads, rather than on processes.
Each process has a main thread, and can have any number of additional
threads. The process exits when the main thread exits.
This patch doesn't actually spawn any additional threads, it merely
does all the plumbing needed to make it possible. :^)
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Only the receive timeout is hooked up yet. You can change the timeout by
calling setsockopt(..., SOL_SOCKET, SO_RCVTIMEO, ...).
Use this mechanism to make /bin/ping report timeouts.
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All ICMP sockets now receive all ICMP packets. All this buffering is gonna
need some limits and such.
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The first userland networking program will be "ping" :^)
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This is a bit more comfortable than passing the shared buffer ID manually
everywhere and keeping track of size etc.
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We don't handle nesting yet, but this is a step in the right direction.
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It's now possible to create symbolic links! :^)
This exposed an issue in Ext2FS where we'd write uninitialized data past
the end of an inode's content. Fix this by zeroing out the tail end of
the last block in a file.
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/bin/cp will now copy the permission bits from source to destination. :^)
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It now builds and runs in the small-featureset configuration. :^)
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Move syscall to int 0x82 since using int 0x80 was kinda prone to fork bombs
when building things on Linux. :^)
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I'm still feeling this out, but I am starting to like the general idea.
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Dealing with the unsigned overflow propagation here just seems unreasonably
error prone. Let's limit ourselves to 2GB buffer sizes instead.
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Get rid of the convoluted get_arguments and get_environment syscalls.
This patch also adds a simple /bin/env that just prints its environment.
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This accidentally grew into a little bit of VFS cleanup as well.
Also add a simple /bin/ln implementation to exercise it.
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And use this to implement shared bitmaps between WindowServer and clients.
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One big step towards userspace WindowServer. :^)
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This is all pretty verbose but I can whittle it down later. :^)
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In order to move the WindowServer to userspace, I have to eliminate its
dependence on system call facilities. The communication channel with each
client needs to be message-based in both directions.
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I found a cute program that renders an animated nyancat in the terminal.
This patch adds enough hackery to get it working correctly. :^)
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Only raw octal modes are supported right now.
This patch also changes mode_t from 32-bit to 16-bit to match the on-disk
type used by Ext2FS.
I also ran into EPERM being errno=0 which was confusing, so I inserted an
ESUCCESS in its place.
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It's really only supported in Ext2FS since SynthFS doesn't really want you
mucking around with its files. This is pretty neat though :^)
I ran into some trouble with HashMap while working on this but opted to work
around it and leave that for a separate investigation.
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Implement this functionality by adding global cursor tracking.
It's currently only possible for one GWidget per GWindow to track the cursor.
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Instead of clients painting whenever they feel like it, we now ask that they
paint in response to a paint message.
After finishing painting, clients notify the WindowServer about the rect(s)
they painted into and then flush eventually happens, etc.
This stuff leaves us with a lot of badly named things. Need to fix that.
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This means we only have to do one fill_rect() per line and the whole process
ends up being ~10% faster than before.
Also added a read_tsc() syscall to give userspace access to the TSC.
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To start painting, call:
gui$get_window_backing_store()
Then finish up with:
gui$release_window_backing_store()
Process will retain the underlying GraphicsBitmap behind the scenes.
This fixes racing between the WindowServer and GUI clients.
This patch also adds a WSWindowLocker that is exactly what it sounds like.
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This is no longer needed as the Kernel can stand on its own legs now
and there won't be any conflict with host system data types.
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This patch adds most of the plumbing for working file deletion in Ext2FS.
Directory entries are removed and inode link counts updated.
We don't yet update the inode or block bitmaps, I will do that separately.
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It's now possible to create zero-length files! :^)
Also hook up the new functionality in /bin/touch.
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I'm not in love with this syscall API but it allows me to make progress.
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