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|
#! /bin/bash
#*********************************************************************
#
# bootinfo -- get boot information via DHCP protocol
#
# This script is part of FAI (Fully Automatic Installation)
# (c) 2003-2025 by Thomas Lange, lange@cs.uni-koeln.de
# Universitaet zu Koeln
#
#*********************************************************************
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# A copy of the GNU General Public License is available as
# `/usr/share/common-licences/GPL' in the Debian GNU/Linux distribution
# or on the World Wide Web at http://www.gnu.org/copyleft/gpl.html. You
# can also obtain it by writing to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#*********************************************************************
# this script writes received information to $LOGDIR/boot.log
bootlog=$LOGDIR/boot.log
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
netdevice_info() {
# devices that are running
netdevices_up=$(ip -br a| awk '/UP / {if ($3) print $1}' | tr '\n' ' ')
# netdevices is the list of ethernet devices which will be used for bootpc (maybe dhcp)
# if not defined, use boot messages to determine network devices
[ -n "$netdevices" ] || netdevices=$netdevices_up
netdevices_all=$(ip -br a| grep -P -o "^eth\S+|^en\S+"|tr '\n' ' ')
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
get_dhcp_info() {
local tmp=$(mktemp)
if [ $boot -eq 1 ]; then
return
fi
boot=1
if [ -n "$netdevices_up" ]; then
dhcpcd -T -f /usr/share/fai/dhcpcd.conf $netdevices | egrep '^new_' > $tmp 2> $LOGDIR/dhcpcd.log
set -a
source $tmp
dhclient-perl >>$bootlog
rm -f $tmp
setnet
fi
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
setnet() {
# get network parameters
local dummy
# determine the name of the default network interface
# try several times if dhclient needs some more time
local i=0
NIC1=$(ip route | awk '/^default/ {print $5}'|head -1)
while [ ! "$NIC1" -a $i -lt 8 ]; do
sleep 2
NIC1=$(ip route | awk '/^default/ {print $5}'|head -1)
(( i += 1 ))
done
if [ -z "$NIC1" ]; then
NIC1=$(ip route | awk '/ dev / {print $3}'|head -1)
fi
# only write info if interface is known
if [ -n "$NIC1" ]; then
CIDR=$(ip --br ad sh $NIC1|awk '{print $3}')
IPADDR=${CIDR%/*}
GATEWAYS=$(ip route | awk '/^default/ {print $3}')
cat >> $bootlog <<-EOF
NIC1=$NIC1
IPADDR=$IPADDR
CIDR=$CIDR
GATEWAYS=$GATEWAYS
EOF
fi
if [ -n "$SERVER" ]; then
echo "SERVER=$SERVER" >> $bootlog
fi
if [ -n "$DOMAIN" ]; then
# DOMAIN was specified on the kernel command line
echo "DOMAIN=$DOMAIN" >> $bootlog
fi
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
get_fixed_info() {
if [ $boot -eq 1 ]; then
return
fi
boot=1
# ip contains the network parameters
echo $ip | grep -q : || echo "Kernel parameter ip= does not contain network parameters."
setnet
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
nic_list_from_cmdline() {
# parse nic(s) that are specified on the kernel command line like this: ip=etX:dhcp
niclist=
line=$(< /proc/cmdline)
for item in $line; do
case $item in
ip=*:dhcp)
nic=
# count the : char in the argument of ip=
n="${item//[^:]}"
# if there are more than 5 :, it's an static IP configuration, do not use this nic
if [ ${#n} -lt 5 ]; then
nic=$(expr match "$item" 'ip=\(.*\):dhcp')
niclist+=" $nic"
fi
;;
esac
done
}
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
netdevice_info
cat > $bootlog <<-EOF
netdevices_all="$netdevices_all"
netdevices_up="$netdevices_up"
netdevices="$netdevices"
EOF
boot=0
# no network needed
if [ "$ip" == "off" ]; then
boot=1
fi
# if ip= parameter contains IP address, get fixed IP data, otherwise use DHCP
if [[ $ip =~ ^.*:*[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3} ]]; then
get_fixed_info
fi
# if devices are specified on the kernel command line, only use those devices for DHCP
nic_list_from_cmdline
if [ -n "$niclist" ]; then
netdevices=$niclist
fi
get_dhcp_info
# use first Ethernet interface, even if it's not used during installation
if [ -z "$NIC1" ]; then
# ignore some names
NIC1=$(ls /sys/class/net/ | egrep '^en' | head -1)
echo "NIC1=$NIC1" >> $bootlog
fi
# DHCP should not overwrite the hostname if it's already set
# then remove this line from boot.log
read hname < /proc/sys/kernel/hostname
if [ -n "$hname" -o "$hname" = '(none)' ]; then
sed -i -e '/^HOSTNAME=/d' $bootlog
fi
if ! grep -q DOMAIN= $bootlog; then
echo 'Info: no domain name configured, using "localdomain"' >&2
echo "DOMAIN=localdomain" >> $bootlog
fi
|
