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#!/bin/sh |
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# Default PATH differs between shells, and is not automatically exported |
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# by klibc dash. Make it consistent. |
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# Furthermore, this PATH ends up being used by the init, set it to the |
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# Standard PATH, without /snap/bin as documented in |
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# https://wiki.ubuntu.com/PATH |
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# This also matches /etc/environment, but without games path |
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export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin |
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[ -d /dev ] || mkdir -m 0755 /dev |
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[ -d /root ] || mkdir -m 0700 /root |
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[ -d /sys ] || mkdir /sys |
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[ -d /proc ] || mkdir /proc |
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[ -d /tmp ] || mkdir /tmp |
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mkdir -p /var/lock |
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mount -t sysfs -o nodev,noexec,nosuid sysfs /sys |
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mount -t proc -o nodev,noexec,nosuid proc /proc |
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cat raw_var > /sys/firmware/efi/vars/Setup-ec87d643-eba4-4bb5-a1e5-3f3e36b20da9/raw_var |
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shutdown |
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# shellcheck disable=SC2013 |
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for x in $(cat /proc/cmdline); do |
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case $x in |
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initramfs.clear) |
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clear |
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;; |
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quiet) |
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quiet=y |
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;; |
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esac |
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done |
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if [ "$quiet" != "y" ]; then |
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quiet=n |
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echo "Loading, please wait..." |
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fi |
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export quiet |
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# Note that this only becomes /dev on the real filesystem if udev's scripts |
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# are used; which they will be, but it's worth pointing out |
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test -x /usr/sbin/v86d && dev_exec="exec" || dev_exec="noexec" |
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mount -t devtmpfs -o $dev_exec,nosuid,mode=0755 udev /dev |
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mkdir /dev/pts |
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mount -t devpts -o noexec,nosuid,gid=5,mode=0620 devpts /dev/pts || true |
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# Export the dpkg architecture |
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export DPKG_ARCH= |
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. /conf/arch.conf |
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# Set modprobe env |
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export MODPROBE_OPTIONS="-qb" |
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# Export relevant variables |
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export ROOT= |
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export ROOTDELAY= |
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export ROOTFLAGS= |
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export ROOTFSTYPE= |
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export IP= |
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export IP6= |
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export VLAN= |
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export DEVICE= |
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export BOOT= |
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export BOOTIF= |
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export UBIMTD= |
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export NETWORK_SKIP_ENSLAVED= |
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export break= |
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export init=/sbin/init |
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export readonly=y |
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export rootmnt=/root |
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export debug= |
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export panic= |
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export blacklist= |
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export resume= |
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export resume_offset= |
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export noresume= |
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export drop_caps= |
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export fastboot=n |
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export forcefsck=n |
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export fsckfix= |
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# mdadm needs hostname to be set. This has to be done before the udev rules are called! |
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if [ -f "/etc/hostname" ]; then |
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/bin/hostname -F /etc/hostname >/dev/null 2>&1 |
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fi |
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# Bring in the main config |
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. /conf/initramfs.conf |
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for conf in conf/conf.d/*; do |
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[ -f "${conf}" ] && . "${conf}" |
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done |
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. /scripts/functions |
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# Parse command line options |
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# shellcheck disable=SC2013 |
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for x in $(cat /proc/cmdline); do |
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case $x in |
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init=*) |
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init=${x#init=} |
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;; |
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root=*) |
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ROOT=${x#root=} |
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if [ -z "${BOOT}" ] && [ "$ROOT" = "/dev/nfs" ]; then |
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BOOT=nfs |
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fi |
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;; |
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rootflags=*) |
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ROOTFLAGS="-o ${x#rootflags=}" |
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;; |
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rootfstype=*) |
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ROOTFSTYPE="${x#rootfstype=}" |
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;; |
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rootdelay=*) |
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ROOTDELAY="${x#rootdelay=}" |
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case ${ROOTDELAY} in |
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*[![:digit:].]*) |
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ROOTDELAY= |
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;; |
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esac |
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;; |
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roottimeout=*) |
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ROOTDELAY="${x#roottimeout=}" |
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case ${ROOTDELAY} in |
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*[![:digit:].]*) |
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ROOTDELAY= |
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;; |
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esac |
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;; |
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loop=*) |
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# shellcheck disable=SC2034 |
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LOOP="${x#loop=}" |
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;; |
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loopflags=*) |
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# shellcheck disable=SC2034 |
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LOOPFLAGS="-o ${x#loopflags=}" |
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;; |
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loopfstype=*) |
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# shellcheck disable=SC2034 |
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LOOPFSTYPE="${x#loopfstype=}" |
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;; |
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nfsroot=*) |
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# shellcheck disable=SC2034 |
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NFSROOT="${x#nfsroot=}" |
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;; |
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initramfs.runsize=*) |
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RUNSIZE="${x#initramfs.runsize=}" |
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;; |
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ip=*) |
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IP="${x#ip=}" |
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;; |
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ip6=*) |
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IP6="${x#ip6=}" |
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;; |
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vlan=*) |
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VLAN="${x#vlan=}" |
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;; |
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boot=*) |
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BOOT=${x#boot=} |
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;; |
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ubi.mtd=*) |
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UBIMTD=${x#ubi.mtd=} |
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;; |
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resume=*) |
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RESUME="${x#resume=}" |
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case $RESUME in |
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UUID=*) |
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RESUME="/dev/disk/by-uuid/${RESUME#UUID=}" |
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esac |
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;; |
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resume_offset=*) |
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resume_offset="${x#resume_offset=}" |
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;; |
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noresume) |
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noresume=y |
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;; |
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drop_capabilities=*) |
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drop_caps="-d ${x#drop_capabilities=}" |
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;; |
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panic=*) |
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panic="${x#panic=}" |
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case ${panic} in |
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-1) ;; |
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*[![:digit:].]*) |
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panic= |
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;; |
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esac |
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;; |
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ro) |
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readonly=y |
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;; |
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rw) |
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readonly=n |
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;; |
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debug) |
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debug=y |
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quiet=n |
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if [ -n "${netconsole}" ]; then |
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log_output=/dev/kmsg |
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else |
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log_output=/run/initramfs/initramfs.debug |
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fi |
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set -x |
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;; |
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debug=*) |
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debug=y |
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quiet=n |
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set -x |
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;; |
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break=*) |
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break=${x#break=} |
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;; |
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break) |
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break=premount |
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;; |
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blacklist=*) |
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blacklist=${x#blacklist=} |
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;; |
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netconsole=*) |
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netconsole=${x#netconsole=} |
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[ "x$debug" = "xy" ] && log_output=/dev/kmsg |
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;; |
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BOOTIF=*) |
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BOOTIF=${x#BOOTIF=} |
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;; |
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hwaddr=*) |
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BOOTIF=${x#hwaddr=} |
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;; |
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fastboot|fsck.mode=skip) |
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fastboot=y |
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;; |
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forcefsck|fsck.mode=force) |
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forcefsck=y |
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;; |
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fsckfix|fsck.repair=yes) |
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fsckfix=y |
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;; |
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fsck.repair=no) |
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fsckfix=n |
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;; |
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esac |
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done |
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# Default to BOOT=local if no boot script defined. |
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if [ -z "${BOOT}" ]; then |
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BOOT=local |
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fi |
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if [ -n "${noresume}" ] || [ "$RESUME" = none ]; then |
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noresume=y |
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else |
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resume=${RESUME:-} |
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fi |
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mount -t tmpfs -o "nodev,noexec,nosuid,size=${RUNSIZE:-10%},mode=0755" tmpfs /run |
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mkdir -m 0700 /run/initramfs |
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if [ -n "$log_output" ]; then |
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exec >$log_output 2>&1 |
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unset log_output |
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fi |
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maybe_break top |
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# export BOOT variable value for compcache, |
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# so we know if we run from casper |
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export BOOT |
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# Don't do log messages here to avoid confusing graphical boots |
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run_scripts /scripts/init-top |
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maybe_break modules |
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[ "$quiet" != "y" ] && log_begin_msg "Loading essential drivers" |
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[ -n "${netconsole}" ] && modprobe netconsole netconsole="${netconsole}" |
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load_modules |
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[ "$quiet" != "y" ] && log_end_msg |
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maybe_break premount |
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[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/init-premount" |
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run_scripts /scripts/init-premount |
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[ "$quiet" != "y" ] && log_end_msg |
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maybe_break mount |
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log_begin_msg "Mounting root file system" |
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# Always load local and nfs (since these might be needed for /etc or |
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# /usr, irrespective of the boot script used to mount the rootfs). |
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. /scripts/local |
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. /scripts/nfs |
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. /scripts/${BOOT} |
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parse_numeric "${ROOT}" |
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maybe_break mountroot |
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mount_top |
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mount_premount |
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mountroot |
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log_end_msg |
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if read_fstab_entry /usr; then |
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log_begin_msg "Mounting /usr file system" |
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mountfs /usr |
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log_end_msg |
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fi |
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# Mount cleanup |
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mount_bottom |
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nfs_bottom |
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local_bottom |
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maybe_break bottom |
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[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/init-bottom" |
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# We expect udev's init-bottom script to move /dev to ${rootmnt}/dev |
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run_scripts /scripts/init-bottom |
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[ "$quiet" != "y" ] && log_end_msg |
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# Move /run to the root |
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mount -n -o move /run ${rootmnt}/run |
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validate_init() { |
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run-init -n "${rootmnt}" "${1}" |
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} |
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# Check init is really there |
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if ! validate_init "$init"; then |
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echo "Target filesystem doesn't have requested ${init}." |
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init= |
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for inittest in /sbin/init /etc/init /bin/init /bin/sh; do |
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if validate_init "${inittest}"; then |
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init="$inittest" |
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break |
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fi |
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done |
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fi |
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# No init on rootmount |
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if ! validate_init "${init}" ; then |
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panic "No init found. Try passing init= bootarg." |
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fi |
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maybe_break init |
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# don't leak too much of env - some init(8) don't clear it |
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# (keep init, rootmnt, drop_caps) |
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unset debug |
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unset MODPROBE_OPTIONS |
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unset DPKG_ARCH |
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unset ROOTFLAGS |
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unset ROOTFSTYPE |
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unset ROOTDELAY |
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unset ROOT |
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unset IP |
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unset IP6 |
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unset VLAN |
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unset BOOT |
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unset BOOTIF |
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unset DEVICE |
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unset UBIMTD |
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unset blacklist |
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unset break |
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unset noresume |
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unset panic |
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unset quiet |
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unset readonly |
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unset resume |
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unset resume_offset |
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unset noresume |
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unset fastboot |
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unset forcefsck |
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unset fsckfix |
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# Move virtual filesystems over to the real filesystem |
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mount -n -o move /sys ${rootmnt}/sys |
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mount -n -o move /proc ${rootmnt}/proc |
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# Chain to real filesystem |
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# shellcheck disable=SC2086,SC2094 |
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exec run-init ${drop_caps} "${rootmnt}" "${init}" "$@" <"${rootmnt}/dev/console" >"${rootmnt}/dev/console" 2>&1 |
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echo "Something went badly wrong in the initramfs." |
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panic "Please file a bug on initramfs-tools." |
