Support exit status for exit/wait

One test case for returning a exit status
Passes usertests, but haven't used it to simplify tests

1 files changed, 4 insertions, 4 deletions

diff --git a/user/wc.c b/user/wc.c
index 43bbf16..5dd4e7b 100644
--- a/user/wc.c
+++ b/user/wc.c
@@ -27,7 +27,7 @@ wc(int fd, char *name)
   }
   if(n < 0){
     printf("wc: read error\n");
-    exit();
+    exit(-1);
   }
   printf("%d %d %d %s\n", l, w, c, name);
 }
@@ -39,16 +39,16 @@ main(int argc, char *argv[])
 
   if(argc <= 1){
     wc(0, "");
-    exit();
+    exit(0);
   }
 
   for(i = 1; i < argc; i++){
     if((fd = open(argv[i], 0)) < 0){
       printf("wc: cannot open %s\n", argv[i]);
-      exit();
+      exit(-1);
     }
     wc(fd, argv[i]);
     close(fd);
   }
-  exit();
+  exit(0);
 }