Linux: detect container process by different PID namespace

Container engines like docker and podman rely on Linux namespaces.  If
available check if the target process is inside a different PID
namespace than htop.  This check will mark sandbox'ed applications, e.g.
under bubblewrap, but not light-wight containers, like distrobox.

1 files changed, 1 insertions, 1 deletions

diff --git a/Process.h b/Process.h
index 066c1402..848894ca 100644
--- a/Process.h
+++ b/Process.h
@@ -94,7 +94,7 @@ typedef struct Process_ {
    bool isUserlandThread;
 
    /* This process is running inside a container */
-   bool isRunningInContainer;
+   Tristate isRunningInContainer;
 
    /* Controlling terminal identifier of the process */
    unsigned long int tty_nr;