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- #!/bin/sh
- [ -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
- # Some things don't work properly without /etc/mtab.
- ln -sf /proc/mounts /etc/mtab
- grep -q '\<quiet\>' /proc/cmdline || echo "Loading, please wait..."
- # 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
- 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 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=
- # mdadm needs hostname to be set. This has to be done before the udev rules are called!
- if [ -f "/etc/hostname" ]; then
- /bin/hostname -b -F /etc/hostname 2>&1 1>/dev/null
- fi
- # 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 ${ROOTDELAY} in
- *[![:digit:].]*)
- ROOTDELAY=
- ;;
- esac
- ;;
- resumedelay=*)
- RESUMEDELAY="${x#resumedelay=}"
- ;;
- loop=*)
- LOOP="${x#loop=}"
- ;;
- loopflags=*)
- LOOPFLAGS="-o ${x#loopflags=}"
- ;;
- loopfstype=*)
- LOOPFSTYPE="${x#loopfstype=}"
- ;;
- cryptopts=*)
- cryptopts="${x#cryptopts=}"
- ;;
- nfsroot=*)
- NFSROOT="${x#nfsroot=}"
- ;;
- netboot=*)
- NETBOOT="${x#netboot=}"
- ;;
- ip=*)
- IP="${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=${x#BOOTIF=}
- ;;
- hwaddr=*)
- BOOTIF=${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
- # export BOOT variable value for compcache,
- # so we know if we run from casper
- export BOOT
- # 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 2>&1
- panic "Could not execute run-init."
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