From af4ce911c8315e3f339ea809ccf04b65ef834075 Mon Sep 17 00:00:00 2001
From: ZauJulio <zaujulio.dev@gmail.com>
Date: Thu, 16 Feb 2023 17:48:23 -0300
Subject: [PATCH] mktemp: fix PrefixContainsDirSeparator verification

---
 src/uu/mktemp/src/mktemp.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/uu/mktemp/src/mktemp.rs b/src/uu/mktemp/src/mktemp.rs
index 390c77bfa..fed946577 100644
--- a/src/uu/mktemp/src/mktemp.rs
+++ b/src/uu/mktemp/src/mktemp.rs
@@ -281,7 +281,11 @@ impl Params {
             .join(prefix_from_template)
             .display()
             .to_string();
-        if options.treat_as_template && prefix.contains(MAIN_SEPARATOR) {
+
+        // Check that the prefix is valid.
+        let prefix_of_template = Path::new(prefix_from_template).display().to_string();
+
+        if options.treat_as_template && prefix_of_template.contains(MAIN_SEPARATOR) {
             return Err(MkTempError::PrefixContainsDirSeparator(options.template));
         }
         if tmpdir.is_some() && Path::new(prefix_from_template).is_absolute() {