diff options
Diffstat (limited to 'init')
| -rwxr-xr-x | init | 215 |
1 files changed, 215 insertions, 0 deletions
@@ -0,0 +1,215 @@ +#!/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 +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 +> /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 break= +export init=/sbin/init +export quiet=n +export readonly=y +export rootmnt=/root +export debug= +export panic= +export blacklist= +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 $ROOT in + LABEL=*) + ROOT="/dev/disk/by-label/${ROOT#LABEL=}" + ;; + 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=*) + IPOPTS="${x#ip=}" + ;; + boot=*) + BOOT=${x#boot=} + ;; + resume=*) + RESUME="${x#resume=}" + ;; + resume_offset=*) + resume_offset="${x#resume_offset=}" + ;; + noresume) + noresume=y + ;; + panic=*) + panic="${x#panic=}" + case ${panic} in + *[![:digit:].]*) + panic= + ;; + esac + ;; + quiet) + quiet=y + ;; + ro) + readonly=y + ;; + rw) + readonly=n + ;; + debug) + debug=y + quiet=n + exec >/tmp/initramfs.debug 2>&1 + set -x + ;; + debug=*) + debug=y + quiet=n + set -x + ;; + break=*) + break=${x#break=} + ;; + break) + break=premount + ;; + blacklist=*) + blacklist=${x#blacklist=} + ;; + esac +done + +if [ -z "${noresume}" ]; then + export resume=${RESUME} +else + export noresume +fi + +depmod -a +maybe_break top + +# Don't do log messages here to avoid confusing usplash +run_scripts /scripts/init-top + +maybe_break modules +log_begin_msg "Loading essential drivers" +load_modules +log_end_msg + +maybe_break premount +[ "$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 ${rootmnt}/proc + +# Check init bootarg +if [ -n "${init}" ] && [ ! -x "${rootmnt}${init}" ]; then + echo "Target filesystem doesn't have ${init}." + init= +fi + +# Search for valid init +if [ -z "${init}" ] ; then + for init in /sbin/init /etc/init /bin/init /bin/sh; do + if [ ! -x "${rootmnt}${init}" ]; then + continue + fi + break + done +fi + +# No init on rootmount +if [ ! -x "${rootmnt}${init}" ]; then + panic "No init found. Try passing init= bootarg." +fi + +# Confuses /etc/init.d/rc +if [ -n ${debug} ]; then + unset debug +fi + +# Chain to real filesystem +maybe_break init +exec run-init ${rootmnt} ${init} "$@" <${rootmnt}/dev/console >${rootmnt}/dev/console +panic "Could not execute run-init." |