From f006710419d45db8c6d2cd14297d231ffa776793 Mon Sep 17 00:00:00 2001
From: ejose19 <8742215+ejose19@users.noreply.github.com>
Date: Sat, 3 Jul 2021 10:36:04 -0300
Subject: [PATCH] refactor: adjust bpfd container runtime detection

---
 pkg/util/proc.go | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/pkg/util/proc.go b/pkg/util/proc.go
index 4436d00856..c1c1c19741 100644
--- a/pkg/util/proc.go
+++ b/pkg/util/proc.go
@@ -119,6 +119,34 @@ func GetContainerRuntime(tgid, pid int) ContainerRuntime {
 		return runtime
 	}
 
+	// Check for container specific files
+	runtime = detectContainerFiles()
+	if runtime != RuntimeNotFound {
+		return runtime
+	}
+
+	return RuntimeNotFound
+}
+
+// Related implementation: https://github.com/systemd/systemd/blob/6604fb0207ee10e8dc05d67f6fe45de0b193b5c4/src/basic/virt.c#L523-L549
+func detectContainerFiles() ContainerRuntime {
+	files := []struct {
+		runtime  ContainerRuntime
+		location string
+	}{
+		// https://github.com/containers/podman/issues/6192
+		// https://github.com/containers/podman/issues/3586#issuecomment-661918679
+		{RuntimePodman, "/run/.containerenv"},
+		// https://github.com/moby/moby/issues/18355
+		{RuntimeDocker, "/.dockerenv"},
+	}
+
+	for i := range files {
+		if osFileExists(files[i].location) {
+			return files[i].runtime
+		}
+	}
+
 	return RuntimeNotFound
 }