From cc87648527cfbc7dd8fdb7484176ac62345dfed5 Mon Sep 17 00:00:00 2001
From: Jeremy Schlatter <jeremy.schlatter@gmail.com>
Date: Wed, 18 Sep 2019 20:04:56 -0700
Subject: [PATCH] Work around getrlimit syscall error on darwin (#286)

Fixes #285
---
 ibazel/main_unix.go | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/ibazel/main_unix.go b/ibazel/main_unix.go
index 7fc04594..e2767536 100644
--- a/ibazel/main_unix.go
+++ b/ibazel/main_unix.go
@@ -16,7 +16,10 @@
 
 package main
 
-import "syscall"
+import (
+	"runtime"
+	"syscall"
+)
 
 func setUlimit() error {
 	var lim syscall.Rlimit
@@ -31,6 +34,15 @@ func setUlimit() error {
 	// http://man7.org/linux/man-pages/man2/getrlimit.2.html
 	lim.Cur = lim.Max
 
+	// If we're on darwin, work around the fact that Getrlimit reports
+	// the wrong value. See https://github.com/golang/go/issues/30401
+	if runtime.GOOS == "darwin" && lim.Cur > 10240 {
+		// The max file limit is 10240, even though
+		// the max returned by Getrlimit is 1<<63-1.
+		// This is OPEN_MAX in sys/syslimits.h.
+		lim.Cur = 10240
+	}
+
 	err = syscall.Setrlimit(syscall.RLIMIT_NOFILE, &lim)
 	if err != nil {
 		return err