Began working on file I/O through stdio.h. Wrote most of the code needed in stdio.h. Next up is writing the syscall handlers.

src/calc.c

@@ -15,7 +15,7 @@ int main(int argc, char** argv) {
 
     while (1) {
         printf("> ");
-        read(input);
+        reads(input);
 
         // Remove whitespace
         char* old = input;

src/kernel.c

@@ -75,6 +75,14 @@ void main() {
     mallocPhysicalAddr = kernelMallocPhysicalAddr;
     mallocPages = kernelMallocPages;
 
+    // Setup stdio FILE*
+    stdin->_file = 0;
+    stdin->_oflag = O_RDONLY;
+    stdout->_file = 1;
+    stdout->_oflag = O_WRONLY | O_APPEND;
+    stderr->_file = 2;
+    stderr->_oflag = O_WRONLY | O_APPEND;
+
     // FS Setup
     cwd = malloc(1024);
     strcpy(cwd, "/");
@@ -92,7 +100,7 @@ void main() {
         char input[256];
         char* inputPtr = input;
 
-        read(input);
+        reads(input);
 
         if (*input == '\0') continue;
 

src/stage3.c

@@ -26,7 +26,7 @@ void main() {
         }
     }
 
-    deinitMemoryRegion(0x1000, 0x11000); // Reserve kernel memory (under 0x12000)
+    deinitMemoryRegion(0x1000, 0x11fff); // Reserve kernel memory (under 0x12000)
     deinitMemoryRegion(MEMMAP_AREA, maxBlocks / BLOCKS_PER_BYTE);
 
     // Load root dir, find kernel INode and parse it