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* util/update-grub_lib.in: New file. * DISTLIST: Add update-grub_lib.in. * conf/common.rmk: Generate update-grub_lib and install it in $(lib_DATA). * Makefile.in: Add install routine for $(lib_DATA). * util/grub.d/00_header.in: Use convert_system_path_to_grub_path() function provided by update-grub_lib to support arbitrary paths of unifont.pff. * util/update-grub.in: Use convert_system_path_to_grub_path() to initialize GRUB_DRIVE_BOOT and GRUB_DRIVE_BOOT_GRUB variables.
All executable files in this directory are processed in shell expansion order. 00_*: Reserved for 00_header. 10_*: Native boot entries. 20_*: Third party apps (e.g. memtest86+). The number namespace in-between is configurable by system installer and/or administrator. For example, you can add an entry to boot another OS as 01_otheros, 11_otheros, etc, depending on the position you want it to occupy in the menu; and then adjust the default setting via /etc/default/grub.