Fix PS/2 mouse ISR blocking; convert USB polling & GFX refresh to processes; remove dead scheduler

PS/2 Mouse:
- Fix ISR spin-blocking by reading port $60 directly with inb() instead
  of calling mouse_read(), which uses mouse_wait_long (100k iterations)
  and would stall the interrupt handler waiting for the next packet byte.

Timer (PIT):
- Increase PIT frequency from ~1024 Hz to ~8 kHz (divisor 1193 -> 149)
  for more granular timer ticks.

Graphics Refresh:
- Replace timer-hook-driven rendering (driver/timers/graphicsrefresh)
  with a dedicated 'gfxd' process that runs a continuous render loop,
  keeping the vCPU active to avoid NEM/Hyper-V pause-loop descheduling.
- Move uidebug from driver/video/ to prog/.
- Update FPS calculation to account for 8 kHz tick rate.

USB Hotplug:
- Replace timer-hook-driven polling (driver/timers/usbhotplug) with a
  dedicated 'usbd' daemon process that sleeps 1s between poll cycles.
- Add bounds check in usbcore.usb_check_hotplug for empty HC list.

Cleanup:
- Remove old scheduler unit (superseded by processmanager/contextswitcher).
- Remove tss unit and tss.init() call from kernel.
- Remove unused syslog import from contextswitcher.
- Reduce BASE_QUANTUM from 8 to 5.

.gitattributes

@@ -1 +1,8 @@
-* text=auto eol=lf
+* text=auto eol=lf
+lvglh/** linguist-vendored
+lvgl/** linguist-vendored
+.vscode/* linguist-vendored
+lib/* linguist-generated
+release/* linguist-generated
+iso/* linguist-generated
+*.asm linguist-detectable

.gitignore

@@ -15,3 +15,4 @@ localenv.json
 dockerout.txt
 AGENTS.md
 *.log
+/doc/*.md

compile_lvgl.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # compile_lvgl.sh — Download LVGL v9.2 source and compile into lib/liblvgl.a
 # Clone & compile in /tmp (fast container-local fs).
-# Copy source + objects to /lvgl (host mount) for debugging.
+# Cache liblvgl.a on host mount (/code/lvgl/) to skip rebuild.
 set -e
 
 LVGL_VERSION="v9.2.2"
@@ -10,6 +10,7 @@ LVGL_DIR="/tmp/lvgl"
 OBJ_DIR="/tmp/lvgl_obj"
 CONF_DIR="$(pwd)/lvglh"
 OUT_DIR="$(pwd)/lib"
+CACHE_DIR="/code/lvgl"
 
 CC="gcc"
 CFLAGS="-m32 -march=i686 -ffreestanding \
@@ -26,6 +27,17 @@ echo " "
 echo "Compiling LVGL..."
 echo " "
 
+# If cached liblvgl.a exists on host mount, just copy it and skip everything
+if [ -f "${CACHE_DIR}/liblvgl.a" ]; then
+    echo "Found cached liblvgl.a in ${CACHE_DIR}, copying to ${OUT_DIR}..."
+    cp "${CACHE_DIR}/liblvgl.a" "${OUT_DIR}/liblvgl.a"
+    echo "(Delete lvgl/liblvgl.a to force a full rebuild.)"
+    echo " "
+    echo "LVGL compilation complete (cached)."
+    echo " "
+    exit 0
+fi
+
 # Clone LVGL into /tmp (container-local)
 rm -rf "$LVGL_DIR"
 echo "Downloading LVGL ${LVGL_VERSION}..."
@@ -105,14 +117,16 @@ else
     echo "No custom LVGL files in lvglh/."
 fi
 
-# Copy source + objects to /lvgl host mount for debugging
-echo "Copying LVGL source and objects to host mount..."
-mkdir /code/lvgl 2>/dev/null || true
-rm -rf /code/lvgl/* /code/lvgl/.[!.]* /code/lvgl/..?* 2>/dev/null || true
-cp -a "$LVGL_DIR/src" /code/lvgl/src
-cp -a "$OBJ_DIR" /code/lvgl/obj
+# Cache liblvgl.a and source to host mount for next build
+echo "Caching LVGL to host mount..."
+mkdir -p "$CACHE_DIR"
+rm -rf ${CACHE_DIR}/* ${CACHE_DIR}/.[!.]* ${CACHE_DIR}/..?* 2>/dev/null || true
+cp "${OUT_DIR}/liblvgl.a" "${CACHE_DIR}/liblvgl.a"
+cp -a "$LVGL_DIR/src" "${CACHE_DIR}/src"
+cp -a "$LVGL_DIR"/*.h "${CACHE_DIR}/" 2>/dev/null || true
+cp -a "$OBJ_DIR" "${CACHE_DIR}/obj"
 echo "Done."
 
 echo " "
 echo "LVGL compilation complete."
-echo " "
+echo " "

compile_sources.sh

@@ -4,4 +4,4 @@ echo "======================="
 echo " "
 echo "Compiling FPC Sources..."
 echo " "
-fpc -Aelf -gw -g -gl -n -v0ew -O3 -OpPENTIUM3 -Si -Sc -Sg -Xd -CX -XXs -CfSSE -CfSSE2 -Rintel -Pi386 -Tlinux -FElib/ -Fusrc/* -Fusrc/driver/* -Fusrc/driver/net/* -Fusrc/driver/bus/* -Fusrc/driver/bus/usb/* -Fusrc/driver/hid/* src/kernel.pas
+fpc -Aelf -gw -g -gl -n -v0ew -O3 -OpPENTIUM3 -Si -Sc -Sg -Xd -CX -XXs -CfSSE -CfSSE2 -Rintel -Pi386 -Tlinux -FElib/ -Fusrc/* -Fusrc/include/* -Fusrc/driver/* -Fusrc/driver/net/* -Fusrc/driver/bus/* -Fusrc/driver/bus/usb/* -Fusrc/driver/hid/* src/kernel.pas

src/contextswitcher.pas

@@ -12,15 +12,118 @@
 //  See the License for the specific language governing permissions and
 //  limitations under the License.
 
-{ 
-	ContextSwitcher - Switch Process Contexts when preempted.
-	
-	@author(Kieron Morris <[email protected]>)
+{
+    ContextSwitcher - Custom IRQ0 handler for preemptive context switching.
+
+    Replaces the default ISR_32 with a naked assembly stub that saves the
+    interrupted context (PUSHAD + segment regs), calls a Pascal helper to
+    dispatch timer hooks, send EOI, and run the scheduler, then restores
+    the next process context (or idles) via the returned ESP.
+
+    @author(Kieron Morris <[email protected]>)
 }
 unit contextswitcher;
 
+{$ASMMODE intel}
+
 interface
 
-implementation;
+uses
+    idt, isrmanager, processmanager, proctypes, util, tracer;
+
+{ Initialise: overwrite IDT gate 32 with our custom ISR. }
+procedure init;
+
+implementation
+
+{ -----------------------------------------------------------------------
+  do_context_switch_work
+  Pascal helper called from the assembly ISR.  Receives the current ESP
+  (pointing to the GS..EFLAGS save area), dispatches timer hooks, sends
+  EOI, runs the scheduler and returns the ESP for the next context.
+  Uses register calling convention: saved_esp in EAX, result in EAX.
+  ----------------------------------------------------------------------- }
+function do_context_switch_work(saved_esp : uint32) : uint32;
+var
+    next : PProcessContext;
+begin
+    { 1. Save ESP into the current process }
+    processmanager.CurrentProcess^.SavedESP := saved_esp;
+
+    { 2. Dispatch all hooks registered on interrupt 32 (timer hooks).
+         This fires TMR_0_ISR.Main which in turn fires BDA tick,
+         graphics refresh, USB hotplug, etc. }
+    isrmanager.dispatchHooks(32);
+
+    { 3. Send End-Of-Interrupt to the master PIC }
+    outb($20, $20);
+
+    { 4. Pick the next process to run (always returns non-nil; idle as fallback) }
+    next := processmanager.scheduler_pick_next;
+    processmanager.CurrentProcess := next;
+
+    { 5. Return the selected process ESP }
+    do_context_switch_work := next^.SavedESP;
+end;
+
+{ -----------------------------------------------------------------------
+  context_switch_isr
+  Naked assembly ISR that replaces ISR_32 (IRQ0 / PIT timer).
+
+  Stack on entry (pushed by CPU):
+      [ESP+8] EFLAGS
+      [ESP+4] CS
+      [ESP+0] EIP
+
+  We push general-purpose and segment registers, call the Pascal helper,
+  switch ESP to the returned value, pop registers and IRETD.
+  ----------------------------------------------------------------------- }
+procedure context_switch_isr; assembler; nostackframe;
+asm
+    { Save all general-purpose registers (EAX,ECX,EDX,EBX,ESP,EBP,ESI,EDI) }
+    pushad
+
+    { Save segment registers }
+    push ds
+    push es
+    push fs
+    push gs
+
+    { Load kernel data segments }
+    mov ax, $10
+    mov ds, ax
+    mov es, ax
+    mov fs, ax
+    mov gs, ax
+
+    { Call Pascal helper: EAX = current ESP (register calling convention).
+      Returns new ESP in EAX. }
+    mov eax, esp
+    call do_context_switch_work
+    mov esp, eax
+
+    { Restore segment registers }
+    pop gs
+    pop fs
+    pop es
+    pop ds
+
+    { Restore general-purpose registers }
+    popad
+
+    { Return from interrupt }
+    iretd
+end;
+
+{ -----------------------------------------------------------------------
+  init
+  Override IDT gate 32 with our custom ISR.  Must be called AFTER
+  isrmanager.init so that the default gate has been set up first.
+  ----------------------------------------------------------------------- }
+procedure init;
+begin
+    idt.set_gate(32, uint32(@context_switch_isr), $08, ISR_RING_0);
+    tracer.push_trace('contextswitcher.init');
+end;
 
 end.

src/cpu.pas

@@ -22,7 +22,7 @@ unit cpu;
 interface
 
 uses
-    util, RTC;
+    util, RTC, stdio;
 
 type
     PCapabilities_Old = ^TCapabilities_Old;
@@ -113,12 +113,10 @@ var
     CAP_OLD, CAP_NEW : uint32;
 
 procedure init();
+procedure Terminal_Command_CPU(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
 
 implementation
 
-uses
-    stdio;
-
 procedure getCPUIdentifier;
 var
     id0, id1, id2 : uint32;
@@ -325,7 +323,6 @@ end;
 
 procedure init();
 begin
-    stdio.registerCommand('CPU', @Terminal_Command_CPU, 'CPU Info.');
     CPUID.Capabilities0:= PCapabilities_Old(@CAP_OLD);
     CPUID.Capabilities1:= PCapabilities_New(@CAP_NEW); 
     getCPUIdentifier;

src/driver/bus/usb/usbcore.pas

@@ -158,6 +158,9 @@ procedure init;
 { Unit Tests }
 procedure UnitTest;
 
+{ Terminal command }
+procedure terminal_command_usb(params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+
 implementation
 
 { ========================= Globals ========================= }
@@ -954,11 +957,14 @@ end;
 procedure usb_check_hotplug;
 var
     i    : uint32;
+    count: uint32;
     hc   : PUSBHCDriver;
     port : uint8;
 begin
     if HCList = nil then exit;
-    for i := 0 to LL_Size(HCList) - 1 do begin
+    count := LL_Size(HCList);
+    if count = 0 then exit;
+    for i := 0 to count - 1 do begin
         hc := PUSBHCDriver(LL_Get(HCList, i));
         if (hc <> nil) and hc^.PortChangePending then begin
             hc^.PortChangePending := false;
@@ -1100,7 +1106,6 @@ begin
     CompletionHookCount := 0;
     for i := 0 to MAX_COMPLETION_HOOKS - 1 do
         CompletionHooks[i] := nil;
-    stdio.registerCommand('USB', @terminal_command_usb, 'USB subsystem information.');
     syslog.logln('USB Core', 'INIT END.');
     pop_trace;
 end;

src/driver/hid/ps2/ps2_mouse.pas

@@ -119,8 +119,12 @@ var
     x32, y32 : sint32;
     r : pchar;
 begin
+    { mouse_wait(0) checks OBF with a short timeout (100 iterations).
+      When it returns true, data is ready — read it directly with inb($60).
+      Do NOT call mouse_read here: it uses mouse_wait_long (100k iterations)
+      and would spin-block the ISR if the next packet byte hasn't arrived yet. }
     while mouse_wait(0) do begin
-        b := mouse_read;
+        b := inb($60);
         if Cycle = 0 then begin
             if (b AND $08) = $08 then begin
                 Mouse_Byte[Cycle] := b;

src/driver/net/l1/net.pas

@@ -100,8 +100,8 @@ end;
 
 procedure send(p_data : void; p_len : uint16);
 begin
-    //push_trace('net.send');
-    //writeToLogLn('L1: net.send');
+    push_trace('net.send');
+    writeToLogLn('L1/NET: send');
     if CBSend <> nil then CBSend(p_data, p_len);
     pop_trace;
 end;
@@ -111,8 +111,7 @@ var
     context : PPacketContext;
 
 begin
-    //push_trace('net.recv');
-    //writeToLogLn('L1: net.recv');
+    push_trace('net.recv');
     context:= newPacketContext;
     if CBNext <> nil then CBNext(p_data, p_len, context);
     freePacketContext(context);
@@ -129,6 +128,7 @@ end;
 procedure init;
 begin
     push_trace('net.init');
+    writeToLogLn('L1/NET: init');
     //l2
     eth2.register;
     //l3
@@ -136,6 +136,7 @@ begin
     ipv4.register;
     //l4
     icmp.register;
+    tcp.register;
     udp.register;
     //l5
     dhcp.register;

src/driver/net/l2/eth2.pas

@@ -46,6 +46,7 @@ var
 
 procedure registerTypePromisc(eType : uint16; RecvCB : TRecvCallback);
 begin
+    push_trace('eth2.registerTypePromisc');
     register;
     if EthTypes[eType] = nil then EthTypes[eType]:= RecvCB;
     Promisc[eType]:= true;
@@ -53,6 +54,7 @@ end;
 
 procedure registerType(eType : uint16; RecvCB : TRecvCallback);
 begin
+    push_trace('eth2.registerType');
     register;
     if EthTypes[eType] = nil then EthTypes[eType]:= RecvCB;
 end;
@@ -93,7 +95,7 @@ var
     buf        : puint8;
 
 begin
-    //writeToLogLn('    L2: eth2.recv');
+    push_trace('eth2.recv');
     buf:= puint8(p_data);
     
     Header:= PEthernetHeader(buf);
@@ -120,6 +122,7 @@ var
 begin
     push_trace('eth2.register');
     if not Registered then begin
+        writeToLogLn('    L2/ETH: register');
         for i:=0 to 65535 do begin
             EthTypes[i]:= nil;
             Promisc[i]:= false;

src/driver/net/l3/arp.pas

@@ -25,7 +25,7 @@ uses
     tracer, lmemorymanager,
     util, lists,
     net, nettypes, netutils,
-    eth2, ipv4;
+    eth2, ipv4, stdio;
 
 type
     PARPCacheRecord = ^TARPCacheRecord;
@@ -41,11 +41,12 @@ procedure sendGratuitous;
 procedure sendRequest(ip : puint8);
 procedure send(hType : uint16; pType : uint16; op : uint16; p_context : PPacketContext);
 function resolveIP(ip : puint8) : puint8;
+procedure terminal_command_arp(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
 
 implementation
 
 uses
-    stdio, strings;
+    strings;
 
 var
     Registered : Boolean = false;
@@ -96,6 +97,7 @@ var
     hSize, pSize : uint8;
 
 begin
+    push_trace('arp.send');
     if p_context <> nil then begin
         buf:= kalloc(sizeof(TARPHeader));
         hdr:= PARPHeader(buf);
@@ -135,6 +137,8 @@ var
     context : PPacketContext;
 
 begin
+     push_trace('arp.sendGratuitous');
+     writeToLogLn('      L3/ARP: sendGratuitous');
      context:= newPacketContext;
      CopyIPv4(@getIPv4Config^.Address[0], @context^.IP.Destination[0]);
      CopyIPv4(@getIPv4Config^.Address[0], @context^.IP.Source[0]);
@@ -150,6 +154,7 @@ var
     CacheRecord : PARPCacheRecord;
 
 begin
+     push_trace('arp.sendRequestGateway');
      context:= newPacketContext;
      CacheRecord:= findCacheRecordByIP(@getIPv4Config^.Gateway[0]);
      if CacheRecord <> nil then begin
@@ -168,6 +173,8 @@ var
     CacheRecord : PARPCacheRecord;
 
 begin
+     push_trace('arp.sendRequest');
+     writeToLogLn('      L3/ARP: sendRequest');
      context:= newPacketContext;
      CopyIPv4(ip, @context^.IP.Destination[0]);
      CopyIPv4(@getIPv4Config^.Address[0], @context^.IP.Source[0]);
@@ -184,6 +191,7 @@ var
     CacheRecord : PARPCacheRecord;
 
 begin
+    push_trace('arp.resolveIP');
     CacheRecord:= findCacheRecordByIP(ip);
     resolveIP:= nil;
     if CacheRecord = nil then begin
@@ -203,6 +211,7 @@ var
     context      : PPacketContext;
 
 begin
+    push_trace('arp.recv');
     { Get our converted Header }
     Header:= PARPHeader(p_data);
     AHeader.Hardware_Type:= (Header^.Hardware_Type_Hi SHL 8) + Header^.Hardware_Type_Lo;
@@ -298,9 +307,9 @@ procedure register;
 begin
     push_trace('arp.register');
     if not Registered then begin
+        writeToLogLn('      L3/ARP: register');
         Cache:= LL_New(sizeof(TARPCacheRecord));
         eth2.registerTypePromisc($0806, @recv);
-        stdio.registerCommand('ARP', @terminal_command_arp, 'Get ARP Table.');
         Registered:= true;
     end;
     pop_trace;

src/driver/net/l3/ipv4.pas

@@ -26,17 +26,18 @@ uses
     util, strings,
     net, nettypes, netutils,
     lists,
-    eth2;
+    eth2, stdio;
 
 procedure send(p_data : void; p_len : uint16; p_context : PPacketContext);
 procedure registerProtocol(Protocol_ID : uint8; recv_callback : TRecvCallback);
 function  getIPv4Config : PIPv4Configuration;
 procedure register;
+procedure terminal_command_ifconfig(params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
 
 implementation
 
 uses
-    arp, stdio;
+    arp;
 
 var
     Registered : Boolean = false;
@@ -46,7 +47,9 @@ var
 
 function  getIPv4Config : PIPv4Configuration;
 begin
+    push_trace('ipv4.getIPv4Config');
     getIPv4Config:= @Config;
+    pop_trace;
 end;
 
 procedure send(p_data : void; p_len : uint16; p_context : PPacketContext);
@@ -57,6 +60,7 @@ var
     buffer : void;
 
 begin
+    push_trace('ipv4.send');
     inc(CurrentID);
     Header.version:= 4;
     Header.header_len:= 5;
@@ -84,6 +88,7 @@ begin
     memcpy(uint32(p_data), uint32(Buffer) + (Header.header_len * 4), p_len);
     eth2.send(Buffer, (Header.header_len * 4) + p_len, $0800, p_context);
     kfree(Buffer);
+    pop_trace;
 end;
 
 procedure recv(p_data : void; p_len : uint16; p_context : PPacketContext);
@@ -95,6 +100,7 @@ var
     len     : uint16;
 
 begin
+    push_trace('ipv4.recv');
     Header:= PIPV4Header(p_data);
     AHeader.version:= Header^.version;
     AHeader.header_len:= Header^.header_len;
@@ -195,6 +201,7 @@ var
 begin
     push_trace('ipv4.register');
     if not Registered then begin
+        writeToLogLn('      L3/IPv4: register');
         for i:=0 to 255 do begin
             Protocols[i]:= nil;
         end;
@@ -205,7 +212,6 @@ begin
         end;
         Config.UP:= false;
         eth2.registerType($0800, @recv);
-        stdio.registerCommand('IFCONFIG', @terminal_command_ifconfig, 'Configure Network Settings.');
         Registered:= true;
     end;
     pop_trace;
@@ -213,6 +219,7 @@ end;
 
 procedure registerProtocol(Protocol_ID : uint8; recv_callback : TRecvCallback);
 begin
+    push_trace('ipv4.registerProtocol');
     register;
     if Protocols[Protocol_ID] = nil then Protocols[Protocol_ID]:= recv_callback;
     pop_trace;

src/driver/net/l4/udp.pas

@@ -25,7 +25,7 @@ uses
     lmemorymanager,
     nettypes, netutils,
     ipv4, net,
-    util;
+    tracer, util;
 
 procedure register();
 function bind(bindContext : PUDPBindContext) : TUDPError;
@@ -71,6 +71,7 @@ begin
             nullend:= true;
         end;
         pseudoBuffer:= kalloc(sizeof(TUDPPseudoHeader) + pseudoSize);
+        push_trace('udp.CalculateChecksum');
         pseudoBuffer8:= puint8(pseudoBuffer);
         pseudoBuffer16:= puint16(pseudoBuffer);
         pseudoBuffer32:= puint32(pseudoBuffer);
@@ -118,6 +119,7 @@ var
 
 
 begin
+    push_trace('udp.send');
     if udpContext <> nil then begin
         size:= p_len + sizeof(TUDPHeader);
         buffer:= kalloc(size);
@@ -152,6 +154,7 @@ var
     context : PUDPBindContext;
 
 begin
+    push_trace('udp.bind');
     result:= tueGenericError;
     if bindContext <> nil then begin
         if Ports[bindContext^.port] = nil then begin
@@ -174,6 +177,7 @@ var
     context : PUDPBindContext;
 
 begin
+    push_trace('udp.unbind');
     result:= tueGenericError;
     if bindContext <> nil then begin
         context:= Ports[bindContext^.port];
@@ -203,6 +207,7 @@ var
     size    : uint16;
 
 begin
+    push_trace('udp.ProcessPacket');
     header:= PUDPHeader(p_data);
     if Ports[switchendian16(header^.DstPort)] <> nil then begin
         context:= PUDPPacketContext(kalloc(sizeof(TUDPPacketContext)));
@@ -245,6 +250,8 @@ var
     Checksum      : uint32;
 
 begin
+    push_trace('udp.register');
+    writeToLogLn('        L4/UDP: register');
     for i:=0 to 65535 do begin
         Ports[i]:= nil;
     end;

src/driver/net/l5/dhcp.pas

@@ -415,7 +415,7 @@ end;
 
 procedure processPacket_NAK(Header : PDHCPHeader; Options : PDHCPOptions);
 begin
-    syslog.logln('DHCP', 'Process NAK.'); 
+    writeToLogLn('          L5/DHCP: Process NAK.');
     { Server provided a NAK, NULL configuration ready for next DISCOVER/Request } 
     nullConfiguration();  
 end;
@@ -429,7 +429,7 @@ var
     cfgopt : void;
 
 begin
-    syslog.logln('DHCP', 'Process ACK.');
+    writeToLogLn('          L5/DHCP: Process ACK.');
     getIPv4Config^.UP:= false;
     
     //Copy new address
@@ -484,7 +484,7 @@ Var
 
 begin
     syslog.logln('DHCP', 'Process OFFER.');  
-
+    writeToLogLn('          L5/DHCP: Process OFFER.');
     { Check the Transaction ID matches our stored ID, discard if not. }
     if Header^.Transaction_ID = Configuration^.Transaction then begin
         syslog.logln('DHCP', 'XID Match');
@@ -566,6 +566,7 @@ var
 
 begin
     tracer.push_trace('dhcp.processPacket.enter');
+    writeToLogLn('          L5/DHCP: processPacket');
     syslog.logln('DHCP','processPacket');
     
     { Give access to header values & process to correct endianness. }
@@ -636,6 +637,7 @@ var
 
 begin
     tracer.push_trace('dhcp.DHCPDiscover.begin');
+    writeToLogLn('          L5/DHCP: DHCPDiscover');
     { Ensure we have a socket bound. }
     if Socket <> nil then begin    
         { Clear any current configuration }
@@ -711,6 +713,7 @@ var
 
 begin
     tracer.push_trace('dhcp.register');
+    writeToLogLn('          L5/DHCP: register');
     syslog.logln('DHCP', 'Register begin.');
     
     { Kalloc our Configuration Data }

src/driver/storage/storagemanagement.pas

@@ -112,6 +112,7 @@ function get_device_list() : PLinkedListBase;
 procedure register_filesystem(filesystem : PFilesystem);
 
 procedure register_volume(device : PStorage_Device; volume : PStorage_Volume);
+procedure disk_command(params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
 //function writeNewFile(fileName : pchar; extension : pchar; buffer : puint32; size : uint32) : uint32;
 //function readFile(fileName : pchar; extension : pchar; buffer : puint32; byteCount : puint32) : puint32;
 
@@ -231,7 +232,6 @@ begin
     setworkingdirectory('.');
     storageDevices:= ll_new(sizeof(TStorage_Device));
     fileSystems:= ll_New(sizeof(TFilesystem));
-    stdio.registerCommand('DISK', @disk_command, 'Disk utility');
 
     pop_trace();
 end; 

src/driver/storage/vfs.pas

@@ -104,6 +104,10 @@ function GetDirectories(Handle : uint32; Path : pchar) : PHashMap;
 function PathValid(Path : pchar) : TIsPathValid;
 function changeDirectory(Path : pchar) : TIsPathValid;
 function getWorkingDirectory : pchar;
+function makeAbsolutePathFrom(Path : pchar; BaseDir : pchar) : pchar;
+function resolvePathFrom(Path : pchar; BaseDir : pchar) : TIsPathValid;
+function GetDirectoryListingFrom(Path : pchar; BaseDir : pchar) : PHashMap;
+function changeDirectoryFrom(Path : pchar; BaseDir : pchar; var NewDir : pchar) : TIsPathValid;
 
 //VFS Functions
 function newVirtualDirectory(Path : pchar) : TError;
@@ -608,6 +612,67 @@ begin
     tracer.push_trace('vfs.getWorkingDirectory.exit');
 end;
 
+function makeAbsolutePathFrom(Path : pchar; BaseDir : pchar) : pchar;
+var
+    AbsPath  : pchar;
+    TempPath : pchar;
+begin
+    if Path[0] = '/' then
+        AbsPath := stringCopy(Path)
+    else begin
+        if BaseDir[StringSize(BaseDir)-1] <> '/' then
+            TempPath := StringConcat(BaseDir, '/')
+        else
+            TempPath := stringCopy(BaseDir);
+        AbsPath := StringConcat(TempPath, Path);
+        kfree(void(TempPath));
+    end;
+    makeAbsolutePathFrom := AbsPath;
+end;
+
+function resolvePathFrom(Path : pchar; BaseDir : pchar) : TIsPathValid;
+var
+    TempPath : pchar;
+    AbsPath  : pchar;
+begin
+    TempPath := makeAbsolutePathFrom(Path, BaseDir);
+    AbsPath := evaluatePath(TempPath);
+    kfree(void(TempPath));
+    resolvePathFrom := PathValid(AbsPath);
+    kfree(void(AbsPath));
+end;
+
+function GetDirectoryListingFrom(Path : pchar; BaseDir : pchar) : PHashMap;
+var
+    TempPath : pchar;
+    AbsPath  : pchar;
+begin
+    TempPath := makeAbsolutePathFrom(Path, BaseDir);
+    AbsPath := evaluatePath(TempPath);
+    kfree(void(TempPath));
+    GetDirectoryListingFrom := GetDirectoryListing(AbsPath);
+    kfree(void(AbsPath));
+end;
+
+function changeDirectoryFrom(Path : pchar; BaseDir : pchar; var NewDir : pchar) : TIsPathValid;
+var
+    TempPath : pchar;
+    AbsPath  : pchar;
+    Validity : TIsPathValid;
+begin
+    TempPath := makeAbsolutePathFrom(Path, BaseDir);
+    AbsPath := evaluatePath(TempPath);
+    kfree(void(TempPath));
+    Validity := PathValid(AbsPath);
+    if Validity = pvDirectory then
+        NewDir := AbsPath
+    else begin
+        NewDir := nil;
+        kfree(void(AbsPath));
+    end;
+    changeDirectoryFrom := Validity;
+end;
+
 { Terminal Commands }
 
 procedure VFS_COMMAND_PUSHD(params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
@@ -746,11 +811,8 @@ begin
     //outputln('VFS', makeRelative('/test/mydisk/mything', '/test/mydisk'));
     //while true do begin end;
 
-    { Register Terminal Commands }
-    stdio.registerCommand('LS',      @VFS_COMMAND_LS,    'List directory contents.');
-    stdio.registerCommand('CD',      @VFS_COMMAND_CD,    'Set working directory.');
-    stdio.registerCommand('PUSHD',   @VFS_COMMAND_PUSHD, 'Push the working directory.');
-    stdio.registerCommand('POPD',    @VFS_COMMAND_POPD,  'Pop the working directory.');
+    { LS, CD, PUSHD, POPD are now handled as per-terminal builtins
+      in vterminal.pas so each terminal has its own working directory. }
 
     //ht:= PHashMap(Root^.Reference);
     //hashmap.add(ht, 'VDirectory', void(newDummyObject(otVDIRECTORY)));