From e4aaf7afbde3201331163147d4bf308876ceaef4 Mon Sep 17 00:00:00 2001
From: ymmt2005 <ymmt2005@gmail.com>
Date: Wed, 1 Mar 2017 17:47:31 +0900
Subject: [PATCH] Ignore SIGPIPE for systemd, fixes #13.

---
 CHANGELOG.md       |  1 +
 README.md          |  4 ++++
 default.go         |  1 +
 sigpipe.go         | 12 ++++++++++++
 sigpipe_windows.go |  3 +++
 5 files changed, 21 insertions(+)
 create mode 100644 sigpipe.go
 create mode 100644 sigpipe_windows.go

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c25bcbf..59072e5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 - Fix `NewEnvironment` documentation.
+- Ignore SIGPIPE for systemd (#13).
 
 ## [1.4.0] - 2016-09-10
 ### Added
diff --git a/README.md b/README.md
index 8d97271..00dfd2d 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,10 @@ Commands using this framework implement these external specifications:
 
     On Windows, this is not implemented.
 
+* `SIGPIPE`
+
+    SIGPIPE is completely ignored.  See [#13](https://github.com/cybozu-go/cmd/issues/13) for details.
+
 ### Environment variables
 
 * `REQUEST_ID_HEADER`
diff --git a/default.go b/default.go
index 65517a6..51eecaa 100644
--- a/default.go
+++ b/default.go
@@ -9,6 +9,7 @@ var (
 func init() {
 	defaultEnv = NewEnvironment(context.Background())
 	handleSignal(defaultEnv)
+	ignoreSigPipe()
 }
 
 // Stop just declares no further Go will be called.
diff --git a/sigpipe.go b/sigpipe.go
new file mode 100644
index 0000000..9d4d690
--- /dev/null
+++ b/sigpipe.go
@@ -0,0 +1,12 @@
+// +build !windows
+
+package cmd
+
+import (
+	"os/signal"
+	"syscall"
+)
+
+func ignoreSigPipe() {
+	signal.Ignore(syscall.SIGPIPE)
+}
diff --git a/sigpipe_windows.go b/sigpipe_windows.go
new file mode 100644
index 0000000..e630a90
--- /dev/null
+++ b/sigpipe_windows.go
@@ -0,0 +1,3 @@
+package cmd
+
+func ignoreSigPipe() {}