From 0774e79e4fb6262e41217c8e89eca3b0675ce2de Mon Sep 17 00:00:00 2001
From: Calvin Rose <calsrose@gmail.com>
Date: Thu, 14 Oct 2021 13:57:51 -0500
Subject: [PATCH] Pass non-blocking pipes to subprocesses on non-windows
 platform.

---
 src/core/ev.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/core/ev.c b/src/core/ev.c
index 7b68a3ec..54a7a195 100644
--- a/src/core/ev.c
+++ b/src/core/ev.c
@@ -2558,15 +2558,16 @@ void janet_ev_sendto_string(JanetStream *stream, JanetString str, void *dest, in
 static volatile long PipeSerialNumber;
 #endif
 
+/*
+ * mode = 0: both sides non-blocking.
+ * mode = 1: only read side non-blocking: write side sent to subprocess
+ * mode = 2: only write side non-blocking: read side sent to subprocess
+ */
 int janet_make_pipe(JanetHandle handles[2], int mode) {
 #ifdef JANET_WINDOWS
     /*
      * On windows, the built in CreatePipe function doesn't support overlapped IO
      * so we lift from the windows source code and modify for our own version.
-     *
-     * mode = 0: both sides non-blocking.
-     * mode = 1: only read side non-blocking: write side sent to subprocess
-     * mode = 2: only write side non-blocking: read side sent to subprocess
      */
     JanetHandle shandle, chandle;
     UCHAR PipeNameBuffer[MAX_PATH];
@@ -2616,10 +2617,9 @@ int janet_make_pipe(JanetHandle handles[2], int mode) {
     }
     return 0;
 #else
-    (void) mode;
     if (pipe(handles)) return -1;
-    if (fcntl(handles[0], F_SETFL, O_NONBLOCK)) goto error;
-    if (fcntl(handles[1], F_SETFL, O_NONBLOCK)) goto error;
+    if (mode != 2 && fcntl(handles[0], F_SETFL, O_NONBLOCK)) goto error;
+    if (mode != 1 && fcntl(handles[1], F_SETFL, O_NONBLOCK)) goto error;
     return 0;
 error:
     close(handles[0]);