From 6b085892a0e99c21ccb2d94a2edab91cc4f87ad1 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sat, 8 Jul 2023 17:32:41 +0200
Subject: user/keyboard: check open() path

this prevents someone from trying to `ls /keyboard/`, and makes `echo */*`
in dash almost work if you mash the keyboard
---
 src/user/app/init/driver/ps2.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/user/app/init/driver/ps2.c b/src/user/app/init/driver/ps2.c
index 4fee60a..2752238 100644
--- a/src/user/app/init/driver/ps2.c
+++ b/src/user/app/init/driver/ps2.c
@@ -1,9 +1,10 @@
 #include "driver.h"
+#include <camellia/compat.h>
 #include <camellia/syscalls.h>
+#include <errno.h>
 #include <shared/ring.h>
 #include <stdbool.h>
 #include <stdlib.h>
-#include <camellia/compat.h>
 
 
 static const char keymap_lower[] = {
@@ -55,9 +56,15 @@ static void main_loop(void) {
 	struct ufs_request res;
 	int ret;
 	while (!c0_fs_wait(buf, sizeof buf, &res)) {
+		// TODO don't hang on ps2 reads
+
 		switch (res.op) {
 			case VFSOP_OPEN:
-				c0_fs_respond(NULL, 1, 0);
+				if (res.len == 0) {
+					c0_fs_respond(NULL, 1, 0);
+				} else {
+					c0_fs_respond(NULL, -ENOENT, 0);
+				}
 				break;
 
 			case VFSOP_READ:
-- 
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