From a713ee3a59ed09801972918957dfd032a51456e6 Mon Sep 17 00:00:00 2001
From: Hang Park <hangpark@kaist.ac.kr>
Date: Wed, 12 Apr 2017 16:53:15 +0900
Subject: [PATCH] [#10] Implement wait system call

---
 src/userprog/syscall.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/userprog/syscall.c b/src/userprog/syscall.c
index 97088ff..4daf803 100644
--- a/src/userprog/syscall.c
+++ b/src/userprog/syscall.c
@@ -190,10 +190,11 @@ syscall_exec (const char *cmd_line)
   return p->pid;
 }
 
+/* Waits for a child process pid and retrieves the child's exit status. */
 static int 
 syscall_wait (pid_t pid)
 {
-  return 0;
+  return process_wait (pid);
 }
 
 static bool