Kernel: Remove offset from OpenFileDescriptor

This is now handled on the libc side. There might be reasons to
have it in kernel side, but for simplicity's sake I'm moving it
to libc for now :)

userspace/test.c

@@ -1,35 +1,30 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#define N 1024
+#define ERROR(msg) { perror(msg); return 1; }
+#define BUF_SIZE 1024
 
 int main()
 {
-	for (int i = 0; i <= 10; i++)
-	{
-		int** ptrs = malloc(N * sizeof(int*));
-		if (ptrs == NULL)
-		{
-			perror("malloc");
-			return 1;
-		}
-		for (int j = 0; j < N; j++)
-		{
-			ptrs[j] = malloc(sizeof(int));
-			if (ptrs[j] == NULL)
-			{
-				perror("malloc");
-				return 1;
-			}
-			*ptrs[j] = j;
-			putchar('0' + *ptrs[j] % 10);
-		}
-		putchar('\n');
+	FILE* fp = fopen("/usr/include/stdio.h", "r");
+	if (fp == NULL)
+		ERROR("fopen");
 
-		for (int j = 0; j < N; j++)
-			free(ptrs[j]);
-		free(ptrs);
+	char* buffer = malloc(BUF_SIZE);
+	if (buffer == NULL)
+		ERROR("malloc");
+
+	for (;;)
+	{
+		size_t n_read = fread(buffer, 1, BUF_SIZE - 1, fp);
+		if (n_read == 0)
+			break;
+		buffer[n_read] = '\0';
+		printf("%s", buffer);
 	}
-	
+
+	free(buffer);
+	fclose(fp);
+
 	return 0;
 }