mirror of
https://github.com/linuxboot/heads.git
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76a20288a3
usb-boot automatically uses internal xen binary / command line when multiboot is detected. also tweaked to evaluate/remove variable refs in kexec arguments
82 lines
1.7 KiB
Bash
Executable File
82 lines
1.7 KiB
Bash
Executable File
#!/bin/sh
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. /etc/functions
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while getopts "b:e:r:a:" 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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esac
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done
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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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fix_file_path() {
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filepath=`find $bootdir -path "*$firstval" | tail -1`
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if ! [ -r $filepath ]; then
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die "failed to find file $firstval"
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fi
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}
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adjust_cmd_line() {
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if [ -n "$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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}
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first_module=y
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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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fix_file_path
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if [ "$kexectype" = "multiboot" ]; then
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# always overload xen and with custom arguments
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# TODO: control this replacement via flag
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kexeccmd="$kexeccmd -l /bin/xen.gz"
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kexeccmd="$kexeccmd --command-line \"no-real-mode reboot=no\""
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else
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kexeccmd="$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 [ -n $first_module ]; then
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adjust_cmd_line
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unset first_module
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fi
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kexeccmd="$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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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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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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