From 287213b44674cac24ad4eb09dbf2c4a21538462a Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Mon, 10 Mar 2025 18:52:08 +0000
Subject: [PATCH] lib: Print kernel utsname in debug output

Useful for debugging problems caused by the host kernel.  In
particular we were looking at a problem with passt creating a user
namespace but didn't know what exact kernel was being used.

(cherry picked from commit 31fa712aa07190f2c5ed789712b92b4be2d51488)
(cherry picked from commit 19c4d1c8b9f278e054594660b5392d6c08a59d8f)
---
 lib/launch.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/launch.c b/lib/launch.c
index bd0526c9..22196819 100644
--- a/lib/launch.c
+++ b/lib/launch.c
@@ -36,6 +36,7 @@
 #include <signal.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <sys/utsname.h>
 #include <errno.h>
 #include <assert.h>
 #include <libintl.h>
@@ -92,6 +93,7 @@ guestfs_impl_launch (guestfs_h *g)
     struct backend *b;
     CLEANUP_FREE char *backend = guestfs_get_backend (g);
     int mask;
+    struct utsname utsname;
 
     debug (g, "launch: program=%s", g->program);
     if (STRNEQ (g->identifier, ""))
@@ -108,6 +110,10 @@ guestfs_impl_launch (guestfs_h *g)
     if (mask >= 0)
       debug (g, "launch: umask=0%03o", (unsigned) mask);
     debug (g, "launch: euid=%ju", (uintmax_t) geteuid ());
+    if (uname (&utsname) == 0)
+      debug (g, "launch: host: %s %s %s %s %s",
+             utsname.sysname, utsname.nodename, utsname.release,
+             utsname.version, utsname.machine);
   }
 
   /* Launch the appliance. */