From d826e14e2792247ad0b4c34c56f0c07d0870fdaa Mon Sep 17 00:00:00 2001
From: Lomanic <5020919+Lomanic@users.noreply.github.com>
Date: Sat, 1 Jan 2022 17:10:26 +0100
Subject: [PATCH] [net][linux] Fix #1198 "f.ReadDir undefined" on Go 1.15 by
 redefining a custom readDir according to go version

Using os.File.Readdir pre Go 1.16 and os.File.ReadDir post Go 1.16
---
 net/net_linux.go     |  2 +-
 net/net_linux_111.go | 12 ++++++++++++
 net/net_linux_116.go | 12 ++++++++++++
 3 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 net/net_linux_111.go
 create mode 100644 net/net_linux_116.go

diff --git a/net/net_linux.go b/net/net_linux.go
index d856b9e..d323781 100644
--- a/net/net_linux.go
+++ b/net/net_linux.go
@@ -549,7 +549,7 @@ func getProcInodes(root string, pid int32, max int) (map[string][]inodeMap, erro
 		return ret, err
 	}
 	defer f.Close()
-	dirEntries, err := f.ReadDir(max)
+	dirEntries, err := readDir(f, max)
 	if err != nil {
 		return ret, err
 	}
diff --git a/net/net_linux_111.go b/net/net_linux_111.go
new file mode 100644
index 0000000..bd5c958
--- /dev/null
+++ b/net/net_linux_111.go
@@ -0,0 +1,12 @@
+//go:build !go1.16
+// +build !go1.16
+
+package net
+
+import (
+	"os"
+)
+
+func readDir(f *os.File, max int) ([]os.FileInfo, error) {
+	return f.Readdir(max)
+}
diff --git a/net/net_linux_116.go b/net/net_linux_116.go
new file mode 100644
index 0000000..a45072e
--- /dev/null
+++ b/net/net_linux_116.go
@@ -0,0 +1,12 @@
+//go:build go1.16
+// +build go1.16
+
+package net
+
+import (
+	"os"
+)
+
+func readDir(f *os.File, max int) ([]os.DirEntry, error) {
+	return f.ReadDir(max)
+}