From 75b0f73f72e1783d4ace976cdd2b5f23bdc3ebae Mon Sep 17 00:00:00 2001
From: Lukas Larsson <lukas@erlang.org>
Date: Wed, 28 Feb 2018 10:04:53 +0100
Subject: kernel: Fix handling of os:cmd option max_size in win

---
 lib/kernel/src/os.erl | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'lib/kernel/src/os.erl')

diff --git a/lib/kernel/src/os.erl b/lib/kernel/src/os.erl
index ae188ae932..a4b4f798f9 100644
--- a/lib/kernel/src/os.erl
+++ b/lib/kernel/src/os.erl
@@ -319,16 +319,16 @@ get_data(Port, MonRef, Eot, Sofar, Size, Max) ->
 	    iolist_to_binary(Sofar)
     end.
 
-eot(_Bs, <<>>, _Size, _Max) ->
+eot(Bs, <<>>, Size, Max) when Size + byte_size(Bs) < Max ->
     more;
+eot(Bs, <<>>, Size, Max) ->
+    binary:part(Bs, {0, Max - Size});
 eot(Bs, Eot, Size, Max) ->
     case binary:match(Bs, Eot) of
-        nomatch when Size + byte_size(Bs) < Max ->
-            more;
         {Pos, _} when Size + Pos < Max ->
             binary:part(Bs,{0, Pos});
         _ ->
-            binary:part(Bs,{0, Max - Size})
+            eot(Bs, <<>>, Size, Max)
     end.
 
 %% When port_close returns we know that all the
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