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#!/bin/sh # Default PATH differs between shells, and is not automatically exported # by klibc dash. Make it consistent. # Furthermore, this PATH ends up being used by the init, set it to the # Standard PATH, without /snap/bin as documented in # https://wiki.ubuntu.com/PATH # This also matches /etc/environment, but without games path export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin [ -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 sysfs /sys mount -t proc -o nodev,noexec,nosuid proc /proc # shellcheck disable=SC2013 for x in $(cat /proc/cmdline); do case $x in initramfs.clear) clear ;; quiet) quiet=y ;; esac done if [ "$quiet" != "y" ]; then quiet=n echo "Loading, please wait..." fi export quiet # 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 mount -t devtmpfs -o nosuid,mode=0755 udev /dev # Prepare the /dev directory [ ! -h /dev/fd ] && ln -s /proc/self/fd /dev/fd [ ! -h /dev/stdin ] && ln -s /proc/self/fd/0 /dev/stdin [ ! -h /dev/stdout ] && ln -s /proc/self/fd/1 /dev/stdout [ ! -h /dev/stderr ] && ln -s /proc/self/fd/2 /dev/stderr mkdir /dev/pts mount -t devpts -o noexec,nosuid,gid=5,mode=0620 devpts /dev/pts || true # 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 IP6= export VLAN= export DEVICE= export BOOT= export BOOTIF= export UBIMTD= export NETWORK_SKIP_ENSLAVED= export break= export init=/sbin/init export readonly=y export rootmnt=/root export debug= export panic= export blacklist= export resume= export resume_offset= export noresume= export drop_caps= export fastboot=n export forcefsck=n export fsckfix= # mdadm needs hostname to be set. This has to be done before the udev rules are called! if [ -f "/etc/hostname" ]; then /bin/hostname -F /etc/hostname >/dev/null 2>&1 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 # shellcheck disable=SC2013 for x in $(cat /proc/cmdline); do case $x in init=*) init=${x#init=} ;; root=*) ROOT=${x#root=} if [ -z "${BOOT}" ] && [ "$ROOT" = "/dev/nfs" ]; then BOOT=nfs fi ;; rootflags=*) ROOTFLAGS="-o ${x#rootflags=}" ;; rootfstype=*) ROOTFSTYPE="${x#rootfstype=}" ;; rootdelay=*) ROOTDELAY="${x#rootdelay=}" case ${ROOTDELAY} in *[![:digit:].]*) ROOTDELAY= ;; esac ;; roottimeout=*) ROOTDELAY="${x#roottimeout=}" case ${ROOTDELAY} in *[![:digit:].]*) ROOTDELAY= ;; esac ;; loop=*) # shellcheck disable=SC2034 LOOP="${x#loop=}" ;; loopflags=*) # shellcheck disable=SC2034 LOOPFLAGS="-o ${x#loopflags=}" ;; loopfstype=*) # shellcheck disable=SC2034 LOOPFSTYPE="${x#loopfstype=}" ;; nfsroot=*) # shellcheck disable=SC2034 NFSROOT="${x#nfsroot=}" ;; initramfs.runsize=*) RUNSIZE="${x#initramfs.runsize=}" ;; ip=*) IP="${x#ip=}" ;; ip6=*) IP6="${x#ip6=}" ;; vlan=*) VLAN="${x#vlan=}" ;; boot=*) BOOT=${x#boot=} ;; ubi.mtd=*) UBIMTD=${x#ubi.mtd=} ;; resume=*) RESUME="${x#resume=}" ;; resume_offset=*) resume_offset="${x#resume_offset=}" ;; noresume) noresume=y ;; drop_capabilities=*) drop_caps="-d ${x#drop_capabilities=}" ;; panic=*) panic="${x#panic=}" ;; ro) readonly=y ;; rw) readonly=n ;; debug) debug=y quiet=n if [ -n "${netconsole}" ]; then log_output=/dev/kmsg else log_output=/run/initramfs/initramfs.debug fi set -x ;; debug=*) debug=y quiet=n set -x ;; break=*) break=${x#break=} ;; break) break=premount ;; blacklist=*) blacklist=${x#blacklist=} ;; netconsole=*) netconsole=${x#netconsole=} [ "$debug" = "y" ] && log_output=/dev/kmsg ;; BOOTIF=*) BOOTIF=${x#BOOTIF=} ;; hwaddr=*) BOOTIF=${x#hwaddr=} ;; fastboot|fsck.mode=skip) fastboot=y ;; forcefsck|fsck.mode=force) forcefsck=y ;; fsckfix|fsck.repair=yes) fsckfix=y ;; fsck.repair=no) fsckfix=n ;; esac done # Default to BOOT=local if no boot script defined. if [ -z "${BOOT}" ]; then BOOT=local fi if [ -n "${noresume}" ] || [ "$RESUME" = none ]; then noresume=y else case $RESUME in UUID=*) RESUME="/dev/disk/by-uuid/${RESUME#UUID=}" esac resume=${RESUME:-} fi mount -t tmpfs -o "nodev,noexec,nosuid,size=${RUNSIZE:-10%},mode=0755" tmpfs /run mkdir -m 0700 /run/initramfs if [ -n "$log_output" ]; then exec >"$log_output" 2>&1 unset log_output fi maybe_break top # Don't do log messages here to avoid confusing graphical boots run_scripts /scripts/init-top maybe_break modules [ "$quiet" != "y" ] && log_begin_msg "Loading essential drivers" [ -n "${netconsole}" ] && /sbin/modprobe netconsole netconsole="${netconsole}" load_modules [ "$quiet" != "y" ] && log_end_msg starttime="$(_uptime)" starttime=$((starttime + 1)) # round up export starttime 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" # Always load local and nfs (since these might be needed for /etc or # /usr, irrespective of the boot script used to mount the rootfs). . /scripts/local . /scripts/nfs . "/scripts/${BOOT}" parse_numeric "${ROOT}" maybe_break mountroot mount_top mount_premount mountroot log_end_msg if read_fstab_entry /usr; then log_begin_msg "Mounting /usr file system" mountfs /usr log_end_msg fi # Mount cleanup mount_bottom nfs_bottom local_bottom case "$IP" in ""|none|off) case "$IP6" in ""|none|off) ;; # Do nothing *) configure_networking esac ;; *) configure_networking esac maybe_break bottom [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/init-bottom" # We expect udev's init-bottom script to move /dev to ${rootmnt}/dev run_scripts /scripts/init-bottom [ "$quiet" != "y" ] && log_end_msg # Move /run to the root mount -n -o move /run ${rootmnt}/run validate_init() { run-init -n "${rootmnt}" "${1}" } # Check init is really there if ! validate_init "$init"; then echo "Target filesystem doesn't have requested ${init}." init= for inittest in /sbin/init /etc/init /bin/init /bin/sh; do if validate_init "${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 maybe_break init # don't leak too much of env - some init(8) don't clear it # (keep init, rootmnt, drop_caps) unset debug unset MODPROBE_OPTIONS unset DPKG_ARCH unset ROOTFLAGS unset ROOTFSTYPE unset ROOTDELAY unset ROOT unset IP unset IP6 unset VLAN unset BOOT unset BOOTIF unset DEVICE unset UBIMTD unset blacklist unset break unset noresume unset panic unset quiet unset readonly unset resume unset resume_offset unset noresume unset fastboot unset forcefsck unset fsckfix unset starttime # Move virtual filesystems over to the real filesystem mount -n -o move /sys ${rootmnt}/sys mount -n -o move /proc ${rootmnt}/proc # Chain to real filesystem # shellcheck disable=SC2086,SC2094 exec run-init ${drop_caps} "${rootmnt}" "${init}" "$@" <"${rootmnt}/dev/console" >"${rootmnt}/dev/console" 2>&1 echo "Something went badly wrong in the initramfs." panic "Please file a bug on initramfs-tools."