mirror of
https://github.com/linuxboot/heads.git
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62 lines
1.4 KiB
Bash
Executable File
62 lines
1.4 KiB
Bash
Executable File
#!/bin/sh
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# Save these options to be the persistent default
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set -e -o pipefail
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. /etc/functions
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while getopts "b:d:p:e:i:" arg; do
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case $arg in
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b) bootdir="$OPTARG" ;;
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d) paramsdev="$OPTARG" ;;
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p) paramsdir="$OPTARG" ;;
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i) index="$OPTARG" ;;
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esac
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done
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if [ -z "$bootdir" -o -z "$index" ]; then
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die "Usage: $0 -b /boot/ -i menu_option "
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fi
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if [ -z "$paramsdev" ]; then
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paramsdev="$bootdir"
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fi
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if [ -z "$paramsdir" ]; then
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paramsdir="$bootdir"
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fi
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TMP_MENU_FILE="/tmp/kexec/kexec_menu.txt"
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ENTRY_FILE="$paramsdir/kexec_default.$index.txt"
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HASH_FILE="$paramsdir/kexec_default_hashes.txt"
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if [ ! -r "$TMP_MENU_FILE" ]; then
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die "No menu options available, please run kexec-select-boot"
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fi
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entry=`head -n $index $TMP_MENU_FILE | tail -1`
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if [ -z "$entry" ]; then
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die "Invalid menu index $index"
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fi
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# try to switch to rw mode
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mount -o rw,remount $paramsdev
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if [ ! -d $paramsdir ]; then
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mkdir -p $paramsdir \
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|| die "Failed to create params directory"
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fi
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rm "$paramsdir/kexec_default.*.txt" 2>/dev/null || true
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echo "$entry" > $ENTRY_FILE
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cd $bootdir && kexec-boot -b "$bootdir" -e "$entry" -f | \
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xargs sha256sum > $HASH_FILE \
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|| die "Failed to create hashes of boot files"
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if [ ! -r $ENTRY_FILE -o ! -r $HASH_FILE ]; then
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die "Failed to write default config"
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fi
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# sign and auto-roll config counter
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kexec-sign-config -p $paramsdir -u \
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|| die "Failed to sign default config"
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# switch back to ro mode
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mount -o ro,remount $paramsdev
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