50 lines
1.1 KiB
Bash
Executable File
50 lines
1.1 KiB
Bash
Executable File
#!/bin/sh
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if [ $# -lt 1 ]; then
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exit 0;
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fi
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function get_current_root_device
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{
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PARTUUID=$(swupdate -g | sed 's/PARTUUID=\([^ ]*\).*/\1/');
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CURRENT_ROOT=$(readlink -f /dev/disk/by-partuuid/$PARTUUID);
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}
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function get_update_part
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{
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CURRENT_PART="${CURRENT_ROOT: -1}"
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if [ $CURRENT_PART = "2" ]; then
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UPDATE_PART="3";
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GRUB_DEFAULT="1";
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GRUB_FALLBACK="0";
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else
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UPDATE_PART="2";
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GRUB_DEFAULT="0";
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GRUB_FALLBACK="1";
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fi
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}
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function get_update_device
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{
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UPDATE_ROOT=${CURRENT_ROOT%?}${UPDATE_PART}
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}
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if [ $1 == "preinst" ]; then
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# get the current root device
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get_current_root_device
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# get the device to be updated
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get_update_part
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get_update_device
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# create a symlink for the update process
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ln -sf $UPDATE_ROOT /dev/update
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fi
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if [ $1 == "postinst" ]; then
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get_current_root_device
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get_update_part
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sync; /usr/bin/grub-editenv /boot/efi/EFI/BOOT/grubenv set default=$GRUB_DEFAULT; sync;
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sync; /usr/bin/grub-editenv /boot/efi/EFI/BOOT/grubenv set fallback=$GRUB_FALLBACK; sync;
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fi
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