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https://github.com/linuxboot/heads.git
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3eb62eed1a
As part of the config gui we want to be able to have the system define
new config options without them being lost if the user makes their own
changes in CBFS. To allow that this change creates a function initiated
in init that combines all /etc/config* files into /tmp/config. All
existing scripts have been changed to source /tmp/config instead of
/etc/config. The config-gui.sh script now uses /etc/config.user to hold
user configuration options but the combine_configs function will allow
that to expand as others want to split configuration out further.
As it stands here are the current config files:
/etc/config -- Compiled-in configuration options
/etc/config.user -- User preferences that override /etc/config
/tmp/config -- Running config referenced by the BIOS, combination
of existing configs
137 lines
3.0 KiB
Bash
Executable File
137 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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. /tmp/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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fix_file_path
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if [ "$kexectype" = "xen" ]; then
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# always use xen with custom arguments
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kexeccmd="$kexeccmd -l $filepath"
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kexeccmd="$kexeccmd --command-line \"no-real-mode reboot=no vga=current\""
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elif [ "$kexectype" = "multiboot" ]; then
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kexeccmd="$kexeccmd -l $filepath"
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kexeccmd="$kexeccmd --command-line \"$restval\""
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else
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kexeccmd="$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="$restval"
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if [ "$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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