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lib: Print kernel utsname in debug output

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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.
This commit is contained in:
Richard W.M. Jones
2025-03-10 18:52:08 +00:00
parent 01909c51ff
commit 31fa712aa0
1 changed files with 6 additions and 0 deletions
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6
lib/launch.c
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@@ -36,6 +36,7 @@
#include <signal.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#include <errno.h>
#include <assert.h>
@@ -93,6 +94,7 @@ 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, ""))
@@ -109,6 +111,10 @@ 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. */