From 185b0800d9ccc17b5fd81774896b9afaace4d26a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maxime=20Soul=C3=A9?= <btik-git@scoubidou.com>
Date: Sun, 4 Feb 2018 18:02:38 +0100
Subject: [PATCH] Do not Seek when named pipe is watched

At least on FreeBSD 11.1-STABLE amd64 it fails otherwise...
---
 tail.go | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tail.go b/tail.go
index 39729fa6..67329966 100644
--- a/tail.go
+++ b/tail.go
@@ -341,9 +341,13 @@ func (tail *Tail) watchChanges() error {
 	if tail.changes != nil {
 		return nil
 	}
-	pos, err := tail.file.Seek(0, os.SEEK_CUR)
-	if err != nil {
-		return err
+	var pos int64
+	var err error
+	if !tail.Pipe {
+		pos, err = tail.file.Seek(0, os.SEEK_CUR)
+		if err != nil {
+			return err
+		}
 	}
 	tail.changes, err = tail.watcher.ChangeEvents(&tail.Tomb, pos)
 	return err