implement FD_SPECIAL_TTY, an stdout equalivent

1 files changed, 27 insertions, 0 deletions

diff --git a/src/kernel/fd.c b/src/kernel/fd.c
index 7d448eb..e99fb7d 100644
--- a/src/kernel/fd.c
+++ b/src/kernel/fd.c
@@ -1,12 +1,39 @@
 #include <kernel/fd.h>
+#include <kernel/mem.h>
 #include <kernel/panic.h>
 #include <kernel/proc.h>
 
+static int fdop_special_tty(enum fdop fdop, struct fd *fd, void *ptr, size_t len);
+
 int fdop_dispatch(enum fdop fdop, struct fd *fd, void *ptr, size_t len) {
 	switch(fd->type) {
 		case FD_EMPTY:
 			return -1;
+		case FD_SPECIAL_TTY:
+			return fdop_special_tty(fdop, fd, ptr, len);
 		default:
 			panic();
 	}
 }
+
+static int fdop_special_tty(enum fdop fdop, struct fd *fd, void *ptr, size_t len) {
+	switch(fdop) {
+		case FDOP_READ:
+			return -1; // input not implemented yet
+
+		case FDOP_WRITE: {
+			 struct virt_iter iter;
+			 virt_iter_new(&iter, (void*)ptr, len,
+					 process_current->pages, true, false);
+			 while (virt_iter_next(&iter))
+				 tty_write(iter.frag, iter.frag_len);
+			 return iter.prior;
+		}
+
+		case FDOP_CLOSE:
+			fd->type = FD_EMPTY;
+			return 0;
+
+		default: panic();
+	}
+}