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sonic-buildimage/files/Aboot/boot0
2016-03-15 23:38:26 -07:00

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# Copyright (C) 2016 Arista Networks, Inc.
#
# 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 3 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.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Aboot stage 0 boot
set -x
bootconfigvars="SWI SWI_COPY POST_LEVEL CONSOLESPEED PASSWORD NETDEV NETAUTO NETIP NETMASK NETGW NETDOMAIN NETDNS NETHW memtest"
parseenvironmentconfig() {
for n in ${bootconfigvars}; do
eval v="\$$n"
if [ "$v" ]; then
echo "$n=$v"
fi
done
}
kernel=boot/vmlinuz-3.16.0-4-amd64
initrd=boot/initrd.img-3.16.0-4-amd64
TARGET_PATH=/mnt/flash
if [ -d "${swipath}" ]; then
# Not expect a directory name for swipath
exit 1
fi
## Determine whether installing by hash file in the image
GIT_REVISION=$(unzip -p ${swipath} .imagehash)
LOCAL_IMAGEHASH=$(cat $TARGET_PATH/.imagehash 2>/dev/null || true)
if [ "$GIT_REVISION" != "$LOCAL_IMAGEHASH" ]; then
unzip -oq ${swipath} -x boot0 -d ${TARGET_PATH}
fi
echo "${append}" >/tmp/append
parseenvironmentconfig >>/tmp/append
cat /etc/cmdline | sed "/^\(${bootconfigvars// /\|}\|crashkernel\|loglevel\|ignore_loglevel\)\(\$\|=\)/d;/^\$/d" >>/tmp/append
echo "root=/dev/sda1 rw loop=fs.squashfs loopfstype=squashfs apparmor=1 security=apparmor quiet" >>/tmp/append
kexec --load --initrd=${TARGET_PATH}/${initrd} --append="$(tr '\n' ' ' </tmp/append)" ${TARGET_PATH}/${kernel}
[ -z "${testonly}" ] || exit 0
kexec --exec