Beginning of virt-dmesg command, not quite working because I can't work

[virt-mem.git] / dmesg / virt_dmesg.ml

diff --git a/dmesg/virt_dmesg.ml b/dmesg/virt_dmesg.ml
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+(* Memory info for virtual domains.
+   (C) Copyright 2008 Richard W.M. Jones, Red Hat Inc.
+   http://libvirt.org/
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *)
+
+open Printf
+
+open Virt_mem_gettext.Gettext
+open Virt_mem_utils
+open Virt_mem_mmap
+
+let usage = s_"NAME
+  virt-dmesg - dmesg command for virtual machines
+
+SUMMARY
+  virt-dmesg [-options] [domains]
+
+DESCRIPTION
+  virt-dmesg prints the kernel messages for virtual machines running
+  under libvirt.  The output is similar to the ordinary dmesg command
+  run inside the virtual machine."
+
+let verbose, images = Virt_mem.start usage
+
+let () =
+  List.iter (
+    fun (name, arch, mem, lookup_ksym) ->
+      try
+       (* I don't know why but this symbol doesn't exist in 2.6.9
+        * even in kallsyms.  Hence this won't work with that kernel.
+        * It's possible we can fall back to memory scanning. XXX
+        *)
+       let log_buf = lookup_ksym "log_buf" in
+       let log_buf_len = lookup_ksym "log_buf_len" in
+       let log_start = lookup_ksym "log_start" in
+       let log_end = lookup_ksym "log_end" in
+       let con_start = lookup_ksym "con_start" in
+
+       ()
+
+      with
+       Not_found ->
+         eprintf (f_"%s: could not find kernel log buffer in kernel image\n")
+           name
+  ) images