Simple file IO with the ioctl syscall

user/Makefile.inc

@@ -1,5 +1,5 @@
 CFLAGS := -ffreestanding -Wall -Wextra -g -fcommon -nostdinc \
-          -isystem $(ROOT)/std/include -isystem $(ROOT)/ulib
+          -isystem $(ROOT)/std/include -isystem $(ROOT)/ulib -isystem $(ROOT)/share
 
 CURRENT_DIR := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 

user/init/main.c

@@ -1,6 +1,23 @@
 #include <system/system.h>
+#include <sysdefs/ioctl.h>
+#include <string/string.h>
 
 void main(void) {
-  sys_debugprint("Hello world from userspace in C");
+  debugprint("Hello world from userspace in C");
+
+  IOCtlOF ioctlof = { .path = "base:/hello.txt", .flags = IOCTL_F_WRITE | IOCTL_F_READ | IOCTL_F_MAKE };
+  int32_t ioh = ioctl(IOCTL_NOHANDLE, IOCTL_OPENF, &ioctlof);
+
+  char *text = "Write to a file";
+  IOCtlWF ioctlwf = { .buffer = text, .len = string_len(text), .off = 0 };
+  ioctl(ioh, IOCTL_WRITE, &ioctlwf);
+
+  char buf[0x100];
+  IOCtlRF ioctlrf = { .buffer = buf, .len = string_len(text), .off = 0 };
+  ioctl(ioh, IOCTL_READ, &ioctlrf);
+
+  debugprint(buf);
+
+  ioctl(ioh, IOCTL_CLOSEF, NULL);
 }