From 6b47ff61936d2b602d29b229b079bda00dadad7e Mon Sep 17 00:00:00 2001
From: Debarshi Ray <rishi@fedoraproject.org>
Date: Thu, 2 Sep 2021 14:57:37 +0200
Subject: [PATCH] cmd/root: Suggest a way forward if coreos/toolbox was used

github.com/coreos/toolbox bind mounts the entire /run from the host
operating system into the toolbox container. Due to this, when run
rootful, the /run/.containerenv created by Podman inside the container
is also seen on the host. This confuses Toolbox into thinking that it's
running inside a container, even when it's running on the host.

This is an attempt to differentiate between a toolbox container and
the host by looking at the 'container' environment variable, so that
the user can be presented with a more helpful error message.

https://bugzilla.redhat.com/show_bug.cgi?id=1998191
---
 src/cmd/root.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/cmd/root.go b/src/cmd/root.go
index 5e6f5874a469..139609592218 100644
--- a/src/cmd/root.go
+++ b/src/cmd/root.go
@@ -130,6 +130,16 @@ func preRun(cmd *cobra.Command, args []string) error {
 
 	if toolboxPath == "" {
 		if utils.IsInsideContainer() {
+			if containerType := os.Getenv("container"); containerType == "" {
+				var builder strings.Builder
+				fmt.Fprintf(&builder, "/run/.containerenv found on what looks like the host\n")
+				fmt.Fprintf(&builder, "If this is the host, then remove /run/.containerenv and try again.\n")
+				fmt.Fprintf(&builder, "Otherwise, contact your system administrator or file a bug.")
+
+				errMsg := builder.String()
+				return errors.New(errMsg)
+			}
+
 			return errors.New("TOOLBOX_PATH not set")
 		}
 
-- 
2.31.1