From b5c569cd30f8a657b543356e0b563f86b23ab832 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Mon, 20 Aug 2018 16:05:03 +0200
Subject: system/FileDescriptor: add IsPipe(), IsSocket()

---
 src/system/FileDescriptor.cxx | 14 ++++++++++++++
 src/system/FileDescriptor.hxx | 12 ++++++++++++
 2 files changed, 26 insertions(+)

(limited to 'src/system')

diff --git a/src/system/FileDescriptor.cxx b/src/system/FileDescriptor.cxx
index 403aee068..e8760f370 100644
--- a/src/system/FileDescriptor.cxx
+++ b/src/system/FileDescriptor.cxx
@@ -65,6 +65,20 @@ FileDescriptor::IsValid() const noexcept
 	return IsDefined() && fcntl(fd, F_GETFL) >= 0;
 }
 
+bool
+FileDescriptor::IsPipe() const noexcept
+{
+	struct stat st;
+	return IsDefined() && fstat(fd, &st) == 0 && S_ISFIFO(st.st_mode);
+}
+
+bool
+FileDescriptor::IsSocket() const noexcept
+{
+	struct stat st;
+	return IsDefined() && fstat(fd, &st) == 0 && S_ISSOCK(st.st_mode);
+}
+
 #endif
 
 bool
diff --git a/src/system/FileDescriptor.hxx b/src/system/FileDescriptor.hxx
index 1cc780050..a6e32b963 100644
--- a/src/system/FileDescriptor.hxx
+++ b/src/system/FileDescriptor.hxx
@@ -75,6 +75,18 @@ public:
 	 */
 	gcc_pure
 	bool IsValid() const noexcept;
+
+	/**
+	 * Ask the kernel whether this is a pipe.
+	 */
+	gcc_pure
+	bool IsPipe() const noexcept;
+
+	/**
+	 * Ask the kernel whether this is a socket descriptor.
+	 */
+	gcc_pure
+	bool IsSocket() const noexcept;
 #endif
 
 	/**
-- 
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