mirror of
https://github.com/linuxboot/heads.git
synced 2024-12-19 13:07:58 +00:00
138 lines
3.0 KiB
Bash
Executable File
138 lines
3.0 KiB
Bash
Executable File
#!/bin/sh
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# Launches kexec from saved configuration entries
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set -e -o pipefail
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. /etc/config
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. /etc/functions
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dryrun="n"
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printfiles="n"
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printinitrd="n"
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while getopts "b:e:r:a:o:fi" arg; do
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case $arg in
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b) bootdir="$OPTARG" ;;
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e) entry="$OPTARG" ;;
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r) cmdremove="$OPTARG" ;;
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a) cmdadd="$OPTARG" ;;
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o) override_initrd="$OPTARG" ;;
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f) dryrun="y"; printfiles="y" ;;
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i) dryrun="y"; printinitrd="y" ;;
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esac
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done
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if [ -z "$bootdir" -o -z "$entry" ]; then
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die "Usage: $0 -b /boot -e 'kexec params|...|...'"
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fi
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bootdir="${bootdir%%/}"
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kexectype=`echo $entry | cut -d\| -f2`
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kexecparams=`echo $entry | cut -d\| -f3- | tr '|' '\n'`
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kexeccmd="kexec"
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cmdadd="$CONFIG_BOOT_KERNEL_ADD $cmdadd"
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cmdremove="$CONFIG_BOOT_KERNEL_REMOVE $cmdremove"
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fix_file_path() {
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if [ "$printfiles" = "y" ]; then
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# output file relative to local boot directory
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echo ".$firstval"
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fi
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filepath="$bootdir$firstval"
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if ! [ -r $filepath ]; then
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die "Failed to find file $firstval"
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fi
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}
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adjusted_cmd_line="n"
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adjust_cmd_line() {
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if [ -n "$cmdremove" ]; then
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for i in $cmdremove; do
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cmdline="${cmdline//$i/}"
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done
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fi
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if [ -n "$cmdadd" ]; then
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cmdline="$cmdline $cmdadd"
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fi
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adjusted_cmd_line="y"
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}
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module_number="1"
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while read line
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do
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key=`echo $line | cut -d\ -f1`
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firstval=`echo $line | cut -d\ -f2`
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restval=`echo $line | cut -d\ -f3-`
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if [ "$key" = "kernel" ]; then
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if [ "$kexectype" = "xen" ]; then
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# always overload xen and with custom arguments
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kexeccmd="$kexeccmd -l /bin/xen.gz"
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kexeccmd="$kexeccmd --command-line \"no-real-mode reboot=no vga=current\""
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elif [ "$kexectype" = "multiboot" ]; then
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fix_file_path
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kexeccmd="$kexeccmd -l $filepath"
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kexeccmd="$kexeccmd --command-line \"$restval\""
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else
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fix_file_path
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kexeccmd="$kexeccmd -l $filepath"
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fi
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fi
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if [ "$key" = "module" ]; then
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fix_file_path
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cmdline="$restval"
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if [ "$kexectype" = "xen" ]; then
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if [ "$module_number" -eq 1 ]; then
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adjust_cmd_line
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elif [ "$module_number" -eq 2 ]; then
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if [ "$printinitrd" = "y" ]; then
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# output the current path to initrd
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echo $filepath
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fi
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if [ -n "$override_initrd" ]; then
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filepath="$override_initrd"
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fi
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fi
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fi
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module_number=`expr $module_number + 1`
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kexeccmd="$kexeccmd --module \"$filepath $cmdline\""
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fi
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if [ "$key" = "initrd" ]; then
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fix_file_path
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if [ "$printinitrd" = "y" ]; then
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# output the current path to initrd
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echo $filepath
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fi
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if [ -n "$override_initrd" ]; then
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filepath="$override_initrd"
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fi
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kexeccmd="$kexeccmd --initrd=$filepath"
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fi
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if [ "$key" = "append" ]; then
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cmdline="$firstval $restval"
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adjust_cmd_line
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kexeccmd="$kexeccmd --append=\"$cmdline\""
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fi
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done << EOF
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$kexecparams
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EOF
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if [ "$adjusted_cmd_line" = "n" ]; then
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if [ "$kexectype" = "elf" ]; then
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kexeccmd="$kexeccmd --append=\"$cmdadd\""
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else
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die "Failed to add required kernel commands: $cmdadd"
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fi
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fi
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if [ "$dryrun" = "y" ]; then exit 0; fi
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echo "Loading the new kernel:"
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echo "$kexeccmd"
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eval "$kexeccmd" \
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|| die "Failed to load the new kernel"
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echo "Starting the new kernel"
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exec kexec -e
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