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#!/sbin/openrc-run
# Copyright 1999-2015 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
depend() {
need localmount
}
image_path() {
local x= kver=$(uname -r) karch=$(uname -m)
BOOTPART="${BOOTPART:-/boot}"
KNAME="${KNAME:-bzImage}"
if [ -e "${KNAME}" ]; then
echo "${KNAME}"
return 0
fi
for x in "${KNAME#${BOOTPART}}" vmlinuz \
bzImage-${kver} vmlinuz-${kver} \
kernel-genkernel-${karch}-${kver} \
kernel-${kver} kernel-${karch}; do
if [ -e "${BOOTPART}/${x}" ]; then
echo "${BOOTPART}/${x}"
return 0
fi
done
return 1
}
initrd_path() {
local x= kver=$(uname -r) karch=$(uname -m)
BOOTPART="${BOOTPART:-/boot}"
INITRD="${INITRD:-initrd}"
if [ -e "${INITRD}" ]; then
echo "${INITRD}"
return 0
fi
for x in "${INITRD#${BOOTPART}}" \
initrd.img-${kver} initrd-${kver}.img \
initrd-${kver} initramfs-${kver}.img \
initramfs-genkernel-${karch}-${kver} ; do
if [ -e "${BOOTPART}/${x}" ]; then
echo "${BOOTPART}/${x}"
return 0
fi
done
return 1
}
mount_boot(){
local ret
[ "${DONT_MOUNT_BOOT:-no}" = "no" ] || return 1
grep -q " ${BOOTPART:-/boot} " /proc/mounts && return 1
BOOTPART="${BOOTPART:-/boot}"
ebegin "Mounting ${BOOTPART}"
mount "${BOOTPART}"; ret=$?
eend ${ret}
return ${ret}
}
load_image() {
local ret
if [ "${KNAME}" = "-" ]; then
ebegin "Disabling kexec"
kexec -u; ret=$?
eend ${ret}
return ${ret}
fi
BOOTPART="${BOOTPART:-/boot}"
local img= initrd="$(initrd_path)" mounted=false initrdopt=
if ! img="$(image_path)"; then
if mount_boot; then
if img="$(image_path)"; then
mounted=true
initrd="$(initrd_path)"
else
eerror "No kernel image found in ${BOOTPART}!"
umount "${BOOTPART}"
return 1
fi
else
eerror "No kernel image found in ${BOOTPART}!"
return 1
fi
fi
if [ -n "${INITRD}" ] && \
! [ "${BOOTPART}/${INITRD#${BOOTPART}}" = "${initrd}" ]; then
eerror "Requested initrd: ${INITRD#${BOOTPART}}"
eerror "could not be found"
return 1
fi
[ -n "${ROOTPART}" ] || \
ROOTPART="$(readlink -f "$(sed -n '/^\/[^ ]* \/ / s,^\([^ ]*\).*,\1,p' /proc/mounts)")"
[ -n "${KPARAM}" ] || KEXEC_OPT_ARGS="${KEXEC_OPT_ARGS} --reuse-cmdline"
[ -n "${initrd}" ] && [ -e "${initrd}" ] && initrdopt="--initrd=${initrd}"
local msg=
[ -n "${initrd}" ] && \
msg="with ${initrd}"
einfo "Using kernel image ${img} ${msg} for kexec"
ebegin "Setting kexec with ${KEXEC_OPT_ARGS} -l ${img} root=${ROOTPART} ${KPARAM} ${initrdopt}"
kexec ${KEXEC_OPT_ARGS} -l "${img}" --append="root=${ROOTPART} ${KPARAM}" ${initrdopt}
local res=$?
${mounted} && umount "${BOOTPART}"
eend ${res}
return ${res}
}
start() {
if [ "${LOAD_DURING_SHUTDOWN:-yes}" = "yes" ]; then
local ret=0
BOOTPART="${BOOTPART:-/boot}"
if mount_boot; then
mounted=true
fi
if ! image_path > /dev/null; then
ewarn "Cannot find kernel image!"
ewarn "Please make sure a valid kernel image is present before reboot."
return 0
fi
if [ -n "${mounted}" ]; then
ebegin "Unmounting ${BOOTPART}"
umount "${BOOTPART}"; ret=$?
eend ${ret}
fi
return ${ret}
else
ebegin "Configuring kexec"
load_image
eend $?
fi
}
stop() {
if ! yesno $RC_REBOOT; then
einfo "Not rebooting, so disabling"
kexec -u
return 0
fi
if [ -f /nokexec ]; then
einfo "Not using kexec during reboot"
rm -f /nokexec
kexec -u
return 0
fi
[ "${LOAD_DURING_SHUTDOWN:-yes}" != "yes" ] && return 0
ebegin "Configuring kexec"
load_image
eend $?
}
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