From 0df28b9294c60904529548a34741d3c2f9c79f18 Mon Sep 17 00:00:00 2001
From: allencloud <allen.sun@daocloud.io>
Date: Tue, 3 May 2016 23:08:51 +0800
Subject: [PATCH] add fileutils_darwin.go in pkg/fileutils to support darwin
 platform

Signed-off-by: allencloud <allen.sun@daocloud.io>
---
 fileutils/fileutils_darwin.go | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 fileutils/fileutils_darwin.go

diff --git a/fileutils/fileutils_darwin.go b/fileutils/fileutils_darwin.go
new file mode 100644
index 0000000..ccd648f
--- /dev/null
+++ b/fileutils/fileutils_darwin.go
@@ -0,0 +1,27 @@
+package fileutils
+
+import (
+	"os"
+	"os/exec"
+	"strconv"
+	"strings"
+)
+
+// GetTotalUsedFds returns the number of used File Descriptors by
+// executing `lsof -p PID`
+func GetTotalUsedFds() int {
+	pid := os.Getpid()
+
+	cmd := exec.Command("lsof", "-p", strconv.Itoa(pid))
+
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return -1
+	}
+
+	outputStr := strings.TrimSpace(string(output))
+
+	fds := strings.Split(outputStr, "\n")
+
+	return len(fds) - 1
+}