feat: make System Log quit on failed query; display message box

programs/src/syslog/Makefile

@@ -1,4 +1,4 @@
-# Makefile for syslog (standalone Window Server app) on MontaukOS
+# Makefile for syslog on MontaukOS
 # Copyright (c) 2026 Daniel Hammer
 
 MAKEFLAGS += -rR
@@ -51,9 +51,9 @@ TARGET := $(BINDIR)/apps/syslog/syslog.elf
 
 all: $(TARGET)
 
-$(TARGET): $(OBJS) $(LINK_LD) Makefile $(LIBDIR)/libc/liblibc.a
+$(TARGET): $(OBJS) $(LINK_LD) Makefile $(LIBDIR)/libc/liblibc.a $(LIBDIR)/libloader/liblibloader.a
 	mkdir -p $(BINDIR)/apps/syslog
-	$(CXX) $(CXXFLAGS) $(LDFLAGS) $(OBJS) $(LIBDIR)/libc/liblibc.a -o $@
+	$(CXX) $(CXXFLAGS) $(LDFLAGS) $(OBJS) $(LIBDIR)/libc/liblibc.a $(LIBDIR)/libloader/liblibloader.a -o $@
 
 $(OBJDIR)/%.o: %.cpp Makefile
 	mkdir -p $(OBJDIR)

programs/src/syslog/main.cpp

@@ -13,6 +13,7 @@
 #include <gui/standalone.hpp>
 #include <gui/terminal.hpp>
 #include <gui/truetype.hpp>
+#include <gui/dialogs.hpp>
 
 using namespace gui;
 
@@ -181,6 +182,20 @@ extern "C" void _start() {
     g_klog.last_pixels = g_win.pixels;
 
     int n = (int)montauk::read_log(g_klog.klog_buf, KLOG_READ_SIZE);
+
+    /* read_log can return CapabilityDenied or BadPointer */
+    if (n < 0) {
+        gui::dialogs::message_box(
+            "System Log",
+            "System Log was unable to query the system log buffer.",
+            gui::dialogs::MESSAGE_BOX_OK
+        );
+
+        klog_cleanup();
+        g_win.destroy();
+        montauk::exit(-(n));
+    }
+
     if (n > 0) {
         klog_refeed(n);
         g_klog.last_len = n;