main/syslinux: misc update-extlinux fixes

- rename /etc/extlinux-conf to /etc/update-extlinux.conf

- Do not exit with fail if update-extlinux.conf is missing
- Always warn if root= is not defined in update-extlinux.conf
- Try harder to detect the root device by parsing /proc/mounts
- Exit with error if we cannot detect the Root device
- Rename fancy_menu to vesa_menu
- Unifiy the code generating vesa/standard menus
- Keep a backup of old extlinux.conf
- add "overwrite" config option so it is possible to skip overwriting
  the extlinux.conf.

- Added a post-upgrade that imports current extlinux.conf to
  update-extlinux.conf

1 files changed, 31 insertions, 0 deletions

diff --git a/main/syslinux/update-extlinux.conf b/main/syslinux/update-extlinux.conf
new file mode 100644
index 0000000000..17a47f22ca
--- /dev/null
+++ b/main/syslinux/update-extlinux.conf
@@ -0,0 +1,31 @@
+# configuration for extlinux config builder
+
+# overwrite
+# Overwrite current /boot/extlinux.conf. If this is not '1' we will only
+# write to /boot/extlinux.conf.new
+overwrite=1
+
+# vesa_menu
+# use fancy vesa menu (vesamenu.c32) menus, won't work with serial
+vesa_menu=0
+
+# default_kernel_opts
+# default kernel options
+default_kernel_opts=quiet
+
+# modules
+# modules which should be loaded before pivot_root
+modules=sd-mod,usb-storage,ext3
+
+# root
+# root device - if not specified, will be guessed using
+# blkid -o export /dev/root
+root=
+
+# verbose
+# if set to non-zero, update-extlinux will be a lot more verbose.
+verbose=0
+
+# hidden
+# if set to non-zero, the boot menu will be hidden by default.
+hidden=1