From fc5d64a5fc886e0b8519e8c19d311ebfb0df59db Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@sbcglobal.net>
Date: Sun, 18 Dec 2016 15:51:39 -0500
Subject: add inotify.NewInotify

---
 inotify/inotify.go | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'inotify/inotify.go')

diff --git a/inotify/inotify.go b/inotify/inotify.go
index 2db414c..1c0c3c6 100644
--- a/inotify/inotify.go
+++ b/inotify/inotify.go
@@ -96,6 +96,32 @@ func newInotify(fd inFd, blocking bool) *Inotify {
 	return in
 }
 
+// NewInotify creates an Inotify object that wraps an inotify instance
+// on an already open file descriptor, much like net.FileListener.
+//
+// Closing file does not affect the Inotify, and closing Inotify does
+// not affect file.
+func NewInotify(file *os.File) (*Inotify, error) {
+	dup, err := sys_dupfd_cloexec(inFd(file.Fd()))
+	if err != nil {
+		return nil, err
+	}
+
+	nonblock, err := sys_getnonblock(dup)
+	if err != nil {
+		sys_close(dup)
+		return nil, err
+	}
+
+	err = sys_setnonblock(dup, false)
+	if err != nil {
+		sys_close(dup)
+		return nil, err
+	}
+
+	return newInotify(dup, !nonblock), nil
+}
+
 // InotifyInit creates an inotify instance.  The variant
 // InotifyInit1() allows flags to access extra functionality.
 func InotifyInit() (*Inotify, error) {
-- 
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