minix/commands/update_bootcfg/update_bootcfg.sh

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#!/bin/sh
set -e
ROOT=`printroot -r`
DEFAULTCFG=/etc/boot.cfg.default
LOCALCFG=/etc/boot.cfg.local
TMP=/boot.cfg.temp
filter_missing_entries()
{
while read line
do
if ! echo "$line" | grep -s -q 'multiboot'
then
echo "$line"
continue
fi
# Check if kernel presents
kernel=`echo "$line" | sed -n 's/.*multiboot[[:space:]]*\(\/[^[:space:]]*\).*/\1/p'`
if [ ! -r "$kernel" ]
then
echo "Warning: config contains entry for \"$kernel\" which is missing! Entry skipped." 1>&2
else
echo "$line"
fi
done
}
if [ ! -b "$ROOT" ]
then
echo root device $ROOT not found
exit 1
fi
rootdevname=`echo $ROOT | sed 's/\/dev\///'`
if [ -r $DEFAULTCFG ]
then
default_cfg=`cat $DEFAULTCFG`
# Substitute variables like $rootdevname
echo "$default_cfg" | while read line; do eval echo \"$line\" | filter_missing_entries >> $TMP; done
fi
if [ -e /boot/minix_latest -a -d /boot/minix_latest -o -h /boot/minix_latest ]
then
latest=`basename \`stat -f "%Y" /boot/minix_latest\``
fi
[ -d /boot/minix ] && for i in `ls /boot/minix/`
do
build_name="`basename $i`"
if [ "$build_name" != "$latest" ]
then
echo "menu=Start MINIX 3 ($build_name):load_mods $i/mod*;multiboot $i/kernel rootdevname=$rootdevname" >> /$TMP
fi
done
[ -r $LOCALCFG ] && cat $LOCALCFG | filter_missing_entries >> $TMP
mv $TMP /boot.cfg
sync