Simple file IO with the ioctl syscall

share/sysdefs/ioctl.h

@@ -0,0 +1,40 @@
+#ifndef SHARE_SYSDEFS_IOCTL_H_
+#define SHARE_SYSDEFS_IOCTL_H_
+
+#include <stdint.h>
+#include <stddef.h>
+
+#define IOCTL_NOHANDLE (-1)
+
+enum {
+  IOCTL_OPENF = 0,
+  IOCTL_CLOSEF = 1,
+  IOCTL_READ = 2,
+  IOCTL_STAT = 3,
+  IOCTL_WRITE = 4,
+};
+
+enum {
+  IOCTL_F_READ = 1<<0,
+  IOCTL_F_WRITE = 1<<1,
+  IOCTL_F_MAKE = 1<<2,
+};
+
+typedef struct {
+  const char *path;
+  int32_t flags;
+} IOCtlOF;
+
+typedef struct {
+  const uint8_t *const buffer;
+  size_t len;
+  size_t off;
+} IOCtlWF;
+
+typedef struct {
+  uint8_t *const buffer;
+  size_t len;
+  size_t off;
+} IOCtlRF;
+
+#endif // SHARE_SYSDEFS_IOCTL_H_