From 6d0bf438e302afcb0db5422ea2da59d1995e08c1 Mon Sep 17 00:00:00 2001
From: Damien Neil <dneil@google.com>
Date: Wed, 9 Nov 2022 17:49:44 -0800
Subject: path/filepath: add IsLocal

IsLocal reports whether a path lexically refers to a location
contained within the directory in which it is evaluated.
It identifies paths that are absolute, escape a directory
with ".." elements, and (on Windows) paths that reference
reserved device names.

For #56219.

Change-Id: I35edfa3ce77b40b8e66f1fc8e0ff73cfd06f2313
Reviewed-on: https://go-review.googlesource.com/c/go/+/449239
Run-TryBot: Damien Neil <dneil@google.com>
Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Joedian Reid <joedian@golang.org>
---
 src/path/filepath/path_plan9.go | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/path/filepath/path_plan9.go')

diff --git a/src/path/filepath/path_plan9.go b/src/path/filepath/path_plan9.go
index ec792fc831..453206aee3 100644
--- a/src/path/filepath/path_plan9.go
+++ b/src/path/filepath/path_plan9.go
@@ -6,6 +6,10 @@ package filepath
 
 import "strings"
 
+func isLocal(path string) bool {
+	return unixIsLocal(path)
+}
+
 // IsAbs reports whether the path is absolute.
 func IsAbs(path string) bool {
 	return strings.HasPrefix(path, "/") || strings.HasPrefix(path, "#")
-- 
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