diff options
Diffstat (limited to 'boot-env/preboot/init')
-rwxr-xr-x | boot-env/preboot/init | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/boot-env/preboot/init b/boot-env/preboot/init new file mode 100755 index 00000000..987c8192 --- /dev/null +++ b/boot-env/preboot/init @@ -0,0 +1,147 @@ +#!/bin/ash +# Copyright (c) 2008..2009 - OpenSLX GmbH +# +# This program is free software distributed under the GPL version 2. +# See http://openslx.org/COPYING +# +# If you have any feedback please consult http://openslx.org/feedback and +# send your feedback to feedback@openslx.org +# +# General information about OpenSLX can be found at http://openslx.org +# +# Main script for preboot initial ramfs - preloading environment for running +# OpenSLX linux stateless clients version 5 for testing + +fetchip () { +# we expect to get an ip address within 10++ seconds +( sleep 6 ; killall udhcpc >/dev/null 2>&1 ) & +for i in 1 2 ; do + udhcpc -f -n -q $vci -s /usr/share/udhcpc/default.script -i $nwif 2>/dev/null + if grep "ip=" /tmp/ipstuff >/dev/null 2>&1 ; then + . /tmp/ipstuff + for i in $dns ; do + echo "nameserver $i" >> /etc/resolv.conf + done + return + else + if [ $i -eq 1 ] ; then + sleep 1 + else + echo "Did not get any proper IP configuration"; /bin/ash + fi + fi +done +} + +############################################################################# +# device files get their own filesystem +devdir="/dev" +mount -n -t tmpfs -o 'size=25%,mode=0755' initramfsdevs ${devdir} +DEBUGLEVEL=0 + +# create basic device files an directories in dev (for most hardware related +# devices mdev should handle that) +for i in "/dev/mem c 1 1" "/dev/null c 1 3" "/dev/zero c 1 5" \ + "/dev/urandom c 1 9" "/dev/kmsg c 1 11" "/dev/tty0 c 4 0" \ + "/dev/tty1 c 4 1" "/dev/tty2 c 4 2" "/dev/tty3 c 4 3" \ + "/dev/tty4 c 4 4" "/dev/tty5 c 4 5" "/dev/tty6 c 4 6" \ + "/dev/tty7 c 4 7" "/dev/tty8 c 4 8" "/dev/tty9 c 4 9" \ + "/dev/tty10 c 4 10" "/dev/tty c 5 0" "/dev/console c 5 1" \ + "/dev/ptmx c 5 2" "/dev/psaux c 10 1" "/dev/agpgart c 10 175" \ + "/dev/fb0 c 29 0" "/dev/bootsplash p" "/dev/xconsole p"; do + mknod $i +done +mkdir -p ${devdir}/pts ${devdir}/shm ${devdir}/.udevdb ${devdir}/.udev + +# initramfs-setup configuration (common settings for all clients using a +# certain InitRamFS generated by slxmkramfs/mkdxsinitrd) +[ -f /etc/initramfs-setup ] && . /etc/initramfs-setup 2>/dev/null + +export PATH=/bin:/sbin:/usr/bin/:/usr/sbin + +# set a default LAN interface, has to be modified for WLAN or on machines +# with more than one ethernet card built in +nwif="eth0" + +# mount the important standard directories +[ ! -f /proc/cpuinfo ] && mount -n -t proc proc /proc +[ ! -d /sys/class ] && mount -n -t sysfs sysfs /sys + +# load network adaptor modules +for mod in ${NWMODULES}; do + modprobe ${MODPRV} $mod || echo "module $mod did not load for some reason" + usleep 10000 +done + +# read kernel commandline +read KCMDLINE < /proc/cmdline +# read the system wide machine-setup and then the kernel commandline +for opts in ${KCMDLINE} ; do + case ${opts} in + debug) + DEBUGLEVEL=1;; + # ... or a specified debug level (will be passed to next stage) + debug=*) + DEBUGLEVEL=${opts#debug=};; + esac +done + +# start a watchdog to ensure an automated reboot or halt of the machine if the +# preboot init does not succeed (e.g. missing kernel module/firmware for the +# network adaptor) +if [ "${DEBUGLEVEL}" -gt 0 ] ; then + cat<<EOF > /bin/watchdog +#!/bin/ash +echo \$$ > /tmp/watchdogpid +[ ! -f /proc/version ] && mount -n -t proc proc /proc +sleep 120 2> /dev/null +echo "o" > /proc/sysrq-trigger +EOF + chmod u+x /bin/watchdog + watchdog & +fi + +if [ -n "${essid}" ] ; then + # WLAN setup will most probably change the network interface name stored in + # nwif (to wlan0 or something like that) + : +else + # check here for the active ethernet link + ip link show dev eth1 >/dev/null 2>&1 && echo "more than one nw if found" +fi + +# set up loopback networking and power up ethernet +ip link set dev lo up +ip addr add 127.0.0.1/8 dev lo +ip link set dev $nwif up || echo "I did not find any usable network adaptor." + +# run udhcpc and start a debug shell if no lease could be obtained +mkdir -p /usr/share/udhcpc +echo -e "#!/bin/ash\nunset infomsg HOME IFS mask lease interface DEBUGLEVEL \ +BOOT_IMAGE\nset >/tmp/ipstuff" >/usr/share/udhcpc/default.script +chmod u+x /usr/share/udhcpc/default.script +modprobe -q af_packet +[ -n $vci ] && vci="-V $vci" +fetchip +ip addr add $ip/$(ipcalc -s -p $ip $subnet|sed s/.*=//) dev $nwif +ip route add default via $router + +# at this point a little selection script could be downloaded, which lets the +# user choose what kind of SLX client he wants to get +echo "Fetching preboot interactive part and configuration from the net ..." +wget -q -c -O /tmp/preboot.env \ + ftp://openslx:OpenS1X@archive.ruf.uni-freiburg.de/${prebootid}.env +mkdir /preboot +tar -xzf /tmp/${prebootid}.env -C /preboot +# start a debug shell if needed, else set quiet kernel parameter +if [ "${DEBUGLEVEL}" -gt 0 ] ; then + /bin/ash +else + quiet=quiet + echo -e "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n" +fi +# run the preboot interactive part which finally will execute kexec +exec /preboot/preboot.sh +# we will never return from that one ... + + |