From f4f84a882468cb7b2dc4c265bdc18a5df79c3d4d Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Wed, 30 Jul 2025 10:53:20 +0100
Subject: [PATCH] daemon: Add contents of /etc/fstab to verbose log

Also some mdadm configuration files.  This is useful for debugging.

The output looks like this:

  info: /etc/fstab in /dev/VG/Root
  LABEL=BOOT /boot ext2 default 0 0$
  LABEL=ROOT / ext2 default 0 0$

Fixes: https://issues.redhat.com/browse/RHEL-106490
---
 daemon/inspect_fs_unix_fstab.ml | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/daemon/inspect_fs_unix_fstab.ml b/daemon/inspect_fs_unix_fstab.ml
index 8e765454a..b4652a39d 100644
--- a/daemon/inspect_fs_unix_fstab.ml
+++ b/daemon/inspect_fs_unix_fstab.ml
@@ -43,6 +43,23 @@ let rec check_fstab ?(mdadm_conf = false) (root_mountable : Mountable.t)
     if mdadm_conf then ["/etc/mdadm.conf"; "/etc/mdadm/mdadm.conf"] else [] in
   let configfiles = "/etc/fstab" :: mdadmfiles in
 
+  (* If verbose, dump the contents of each config file as that can be
+   * useful for debugging.
+   *)
+  if verbose () then (
+    List.iter (
+      fun filename ->
+        let sysroot_filename = Sysroot.sysroot_path filename in
+        if Sys.file_exists sysroot_filename then (
+          eprintf "info: %s in %s\n%!"
+            filename (Mountable.to_string root_mountable);
+          let cmd = sprintf "cat -A %s >&2" (quote sysroot_filename) in
+          ignore (Sys.command cmd);
+          eprintf "\n%!"
+        )
+    ) configfiles
+  );
+
   with_augeas ~name:"check_fstab_aug"
               configfiles (check_fstab_aug mdadm_conf root_mountable os_type)
 
-- 
2.47.1