From 463ae0abc3225d6e6de4a5a1ad57e64ab76b2b6f Mon Sep 17 00:00:00 2001
From: Robert Morris <rtm@csail.mit.edu>
Date: Fri, 9 Sep 2022 09:17:37 -0400
Subject: [PATCH] handle negative arguments to sleep() a little better
---
kernel/sysproc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/sysproc.c b/kernel/sysproc.c
index 1de184e..3b4d5bd 100644
--- a/kernel/sysproc.c
+++ b/kernel/sysproc.c
@@ -55,6 +55,8 @@ sys_sleep(void)
uint ticks0;
argint(0, &n);
+ if(n < 0)
+ n = 0;
acquire(&tickslock);
ticks0 = ticks;
while(ticks - ticks0 < n){