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#!/bin/sh
echo "Loading, please wait..."
[ -d /dev ] || mkdir -m 0755 /dev
[ -d /root ] || mkdir -m 0700 /root
[ -d /sys ] || mkdir /sys
[ -d /proc ] || mkdir /proc
[ -d /tmp ] || mkdir /tmp
mkdir -p /var/lock
mount -t sysfs -o nodev,noexec,nosuid none /sys
mount -t proc -o nodev,noexec,nosuid none /proc
# Note that this only becomes /dev on the real filesystem if udev's scripts
# are used; which they will be, but it's worth pointing out
tmpfs_size="10M"
if [ -e /etc/udev/udev.conf ]; then
. /etc/udev/udev.conf
fi
if ! mount -t devtmpfs -o mode=0755 none /dev; then
echo "W: devtmpfs not available, falling back to tmpfs for /dev"
mount -t tmpfs -o size=$tmpfs_size,mode=0755 udev /dev
[ -e /dev/console ] || mknod -m 0600 /dev/console c 5 1
[ -e /dev/null ] || mknod /dev/null c 1 3
fi
mkdir /dev/pts
mount -t devpts -o noexec,nosuid,gid=5,mode=0620 none /dev/pts || true
> /dev/.initramfs-tools
mkdir /dev/.initramfs
# Export the dpkg architecture
export DPKG_ARCH=
. /conf/arch.conf
# Set modprobe env
export MODPROBE_OPTIONS="-qb"
# Export relevant variables
export ROOT=
export ROOTDELAY=
export ROOTFLAGS=
export ROOTFSTYPE=
export IP=
export BOOT=
export BOOTIF=
export UBIMTD=
export break=
export init=/sbin/init
export quiet=n
export readonly=y
export rootmnt=/root
export debug=
export panic=
export blacklist=
export resume=
export resume_offset=
# Bring in the main config
. /conf/initramfs.conf
for conf in conf/conf.d/*; do
[ -f ${conf} ] && . ${conf}
done
. /scripts/functions
# Parse command line options
for x in $(cat /proc/cmdline); do
case $x in
init=*)
init=${x#init=}
;;
root=*)
ROOT=${x#root=}
case $ROOT in
LABEL=*)
ROOT="${ROOT#LABEL=}"
# support any / in LABEL= path (escape to \x2f)
case "${ROOT}" in
*/*)
if command -v sed >/dev/null 2>&1; then
ROOT="$(echo ${ROOT} | sed 's,/,\\x2f,g')"
else
if [ "${ROOT}" != "${ROOT#/}" ]; then
ROOT="\x2f${ROOT#/}"
fi
if [ "${ROOT}" != "${ROOT%/}" ]; then
ROOT="${ROOT%/}\x2f"
fi
IFS='/'
newroot=
for s in $ROOT; do
newroot="${newroot:+${newroot}\\x2f}${s}"
done
unset IFS
ROOT="${newroot}"
fi
esac
ROOT="/dev/disk/by-label/${ROOT}"
;;
UUID=*)
ROOT="/dev/disk/by-uuid/${ROOT#UUID=}"
;;
/dev/nfs)
[ -z "${BOOT}" ] && BOOT=nfs
;;
esac
;;
rootflags=*)
ROOTFLAGS="-o ${x#rootflags=}"
;;
rootfstype=*)
ROOTFSTYPE="${x#rootfstype=}"
;;
rootdelay=*)
ROOTDELAY="${x#rootdelay=}"
case ${ROOTDELAY} in
*[![:digit:].]*)
ROOTDELAY=
;;
esac
;;
nfsroot=*)
NFSROOT="${x#nfsroot=}"
;;
ip=*)
IP="${x#ip=}"
;;
boot=*)
BOOT=${x#boot=}
;;
ubi.mtd=*)
UBIMTD=${x#ubi.mtd=}
;;
resume=*)
RESUME="${x#resume=}"
;;
resume_offset=*)
resume_offset="${x#resume_offset=}"
;;
noresume)
noresume=y
;;
panic=*)
panic="${x#panic=}"
case ${panic} in
*[![:digit:].]*)
panic=
;;
esac
;;
quiet)
quiet=y
;;
ro)
readonly=y
;;
rw)
readonly=n
;;
debug)
debug=y
quiet=n
exec >/dev/.initramfs/initramfs.debug 2>&1
set -x
;;
debug=*)
debug=y
quiet=n
set -x
;;
break=*)
break=${x#break=}
;;
break)
break=premount
;;
blacklist=*)
blacklist=${x#blacklist=}
;;
netconsole=*)
netconsole=${x#netconsole=}
;;
BOOTIF=*)
BOOTIF=${x#BOOTIF=}
;;
esac
done
if [ -n "${noresume}" ]; then
export noresume
unset resume
else
resume=${RESUME:-}
fi
[ -n "${netconsole}" ] && modprobe netconsole netconsole="${netconsole}"
maybe_break top
# Don't do log messages here to avoid confusing usplash
run_scripts /scripts/init-top
maybe_break modules
[ "$quiet" != "y" ] && log_begin_msg "Loading essential drivers"
load_modules
[ "$quiet" != "y" ] && log_end_msg
maybe_break premount
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/init-premount"
run_scripts /scripts/init-premount
[ "$quiet" != "y" ] && log_end_msg
maybe_break mount
log_begin_msg "Mounting root file system"
. /scripts/${BOOT}
parse_numeric ${ROOT}
maybe_break mountroot
mountroot
log_end_msg
maybe_break bottom
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/init-bottom"
run_scripts /scripts/init-bottom
[ "$quiet" != "y" ] && log_end_msg
# Move virtual filesystems over to the real filesystem
mount -n -o move /sys ${rootmnt}/sys
mount -n -o move /proc ${rootmnt}/proc
validate_init() {
checktarget="${1}"
# Work around absolute symlinks
if [ -d "${rootmnt}" ] && [ -h "${rootmnt}${checktarget}" ]; then
case $(readlink "${rootmnt}${checktarget}") in /*)
checktarget="$(chroot ${rootmnt} readlink ${checktarget})"
;;
esac
fi
# Make sure the specified init can be executed
if [ ! -x "${rootmnt}${checktarget}" ]; then
return 1
fi
# Upstart uses /etc/init as configuration directory :-/
if [ -d "${rootmnt}${checktarget}" ]; then
return 1
fi
}
# Check init bootarg
if [ -n "${init}" ]; then
if ! validate_init "$init"; then
echo "Target filesystem doesn't have requested ${init}."
init=
fi
fi
# Common case: /sbin/init is present
if [ ! -x "${rootmnt}/sbin/init" ]; then
# ... if it's not available search for valid init
if [ -z "${init}" ] ; then
for inittest in /sbin/init /etc/init /bin/init /bin/sh; do
if validate_init "${inittest}"; then
init="$inittest"
break
fi
done
fi
# No init on rootmount
if ! validate_init "${init}" ; then
panic "No init found. Try passing init= bootarg."
fi
fi
maybe_break init
# don't leak too much of env - some init(8) don't clear it
# (keep init, rootmnt)
unset debug
unset MODPROBE_OPTIONS
unset DPKG_ARCH
unset ROOTFLAGS
unset ROOTFSTYPE
unset ROOTDELAY
unset ROOT
unset IP
unset BOOT
unset BOOTIF
unset UBIMTD
unset blacklist
unset break
unset noresume
unset panic
unset quiet
unset readonly
unset resume
unset resume_offset
# Chain to real filesystem
exec run-init ${rootmnt} ${init} "$@" <${rootmnt}/dev/console >${rootmnt}/dev/console
panic "Could not execute run-init."