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# -*- shell-script -*-
_log_msg()
{
if [ "${quiet?}" = "y" ]; then return; fi
# shellcheck disable=SC2059
printf "$@"
}
log_success_msg()
{
_log_msg "Success: %s\\n" "$*"
}
log_failure_msg()
{
_log_msg "Failure: %s\\n" "$*"
}
log_warning_msg()
{
_log_msg "Warning: %s\\n" "$*"
}
log_begin_msg()
{
_log_msg "Begin: %s ... " "$*"
}
log_end_msg()
{
_log_msg "done.\\n"
}
panic()
{
local console rest IFS
if command -v chvt >/dev/null 2>&1; then
chvt 1
fi
echo "$@"
# Disallow console access
if [ -n "${panic?}" ]; then
echo "Rebooting automatically due to panic= boot argument"
sleep "${panic}"
reboot
exit # in case reboot fails, force kernel panic
fi
run_scripts /scripts/panic
# Try to use setsid, which will enable job control in the shell
# and paging in more
if command -v setsid >/dev/null 2>&1; then
unset IFS
read -r console rest </proc/consoles
if [ "${console}" = "tty0" ]; then
# Need to choose a specific VT
console="tty1"
fi
# We don't have 'setsid -c' so we need to setsid, open
# the tty, and finally exec an interactive shell
REASON="$*" PS1='(initramfs) ' setsid sh -c "exec sh -i <>/dev/${console} 1>&0 2>&1"
else
REASON="$*" PS1='(initramfs) ' sh -i </dev/console >/dev/console 2>&1
fi
}
maybe_break()
{
case ",${break?}," in
*,$1,*)
if [ "$1" = "top" ]; then
# udev is not yet running, so load keyboard drivers
if [ "${quiet}" = "y" ]; then
opts="-q"
else
opts="-v"
fi
modprobe ${opts} -a i8042 atkbd ehci-pci ehci-orion \
ehci-hcd ohci-hcd ohci-pci uhci-hcd usbhid xhci \
xhci-pci xhci-hcd
sleep 2
for modalias in /sys/bus/hid/devices/*/modalias; do
if [ -f "${modalias}" ]; then
modprobe ${opts} -b "$(cat "${modalias}")"
fi
done
fi
panic "Spawning shell within the initramfs"
;;
esac
}
# For boot time only; this is overridden at build time in hook-functions
run_scripts()
{
initdir=${1}
[ ! -d "${initdir}" ] && return
shift
. "${initdir}/ORDER"
}
# Load custom modules first
load_modules()
{
if [ -e /conf/modules ]; then
while read -r m; do
# Skip empty lines
if [ -z "$m" ]; then
continue
fi
# Skip comments - d?ash removes whitespace prefix
com=$(printf "%.1s" "${m}")
if [ "$com" = "#" ]; then
continue
fi
# shellcheck disable=SC2086
modprobe $m
done < /conf/modules
fi
}
# lilo compatibility
parse_numeric() {
case $1 in
*:*)
# Does it match /[0-9]*:[0-9]*/?
minor=${1#*:}
major=${1%:*}
case $major$minor in
*[!0-9]*)
# No.
return
;;
esac
;;
"" | *[!A-Fa-f0-9]*)
# "", "/*", etc.
return
;;
*)
# [A-Fa-f0-9]*
value=$(( 0x${1} ))
minor=$(( (value & 0xff) | (value >> 12) & 0xfff00 ))
major=$(( (value >> 8) & 0xfff ))
;;
esac
# shellcheck disable=SC2034
ROOT="/dev/block/${major}:${minor}"
}
# Parameter: device node to check
# Echos fstype to stdout
# Return value: indicates if an fs could be recognized
get_fstype ()
{
local FS FSTYPE
FS="${1}"
# blkid has a more complete list of file systems,
# but fstype is more robust
FSTYPE="unknown"
eval "$(fstype "${FS}" 2> /dev/null)"
if [ "$FSTYPE" = "unknown" ]; then
FSTYPE=$(blkid -o value -s TYPE "${FS}") || return
fi
echo "${FSTYPE}"
return 0
}
_handle_device_vs_ip()
{
# If the ip= parameter is present and is a colon-separated list,
# then:
# - If it specifies a device, use that in preference to any
# device name we already have
# - Otherwise, substitute in any device name we already have
local IFS=:
set -f
# shellcheck disable=SC2086
set -- ${IP}
set +f
if [ -n "$6" ]; then
DEVICE="$6"
elif [ $# -ge 2 ] && [ -n "${DEVICE}" ]; then
IP="$1:$2:$3:$4:$5:${DEVICE}"
shift 6 || shift $#
IP="${IP}:$*"
fi
}
configure_networking()
{
if [ -n "${BOOTIF}" ]; then
# pxelinux sets BOOTIF to a value based on the mac address of the
# network card used to PXE boot, so use this value for DEVICE rather
# than a hard-coded device name from initramfs.conf. this facilitates
# network booting when machines may have multiple network cards.
# pxelinux sets BOOTIF to 01-$mac_address
# strip off the leading "01-", which isn't part of the mac
# address
temp_mac=${BOOTIF#*-}
# convert to typical mac address format by replacing "-" with ":"
bootif_mac=""
IFS='-'
for x in $temp_mac ; do
if [ -z "$bootif_mac" ]; then
bootif_mac="$x"
else
bootif_mac="$bootif_mac:$x"
fi
done
unset IFS
# look for devices with matching mac address, and set DEVICE to
# appropriate value if match is found.
for device in /sys/class/net/* ; do
if [ -f "$device/address" ]; then
current_mac=$(cat "$device/address")
if [ "$bootif_mac" = "$current_mac" ]; then
DEVICE=${device##*/}
break
fi
fi
done
fi
_handle_device_vs_ip
# networking already configured thus bail out
[ -n "${DEVICE}" ] && [ -e /run/net-"${DEVICE}".conf ] && return 0
wait_for_udev 10
# support ip options see linux sources
# Documentation/filesystems/nfs/nfsroot.txt
# Documentation/frv/booting.txt
for ROUNDTTT in 2 3 4 6 9 16 25 36 64 100; do
# The NIC is to be configured if this file does not exist.
# Ip-Config tries to create this file and when it succeds
# creating the file, ipconfig is not run again.
for x in /run/net-"${DEVICE}".conf /run/net-*.conf ; do
[ -e "$x" ] && break 2
done
case ${IP} in
none|off)
# Do nothing
;;
""|on|any)
# Bring up device
ipconfig -t ${ROUNDTTT} "${DEVICE}"
;;
dhcp|bootp|rarp|both)
ipconfig -t ${ROUNDTTT} -c "${IP}" -d "${DEVICE}"
;;
*)
ipconfig -t ${ROUNDTTT} -d "$IP"
;;
esac
done
# source ipconfig output
if [ -n "${DEVICE}" ]; then
# source specific bootdevice
. "/run/net-${DEVICE}.conf"
else
# source any interface...
# ipconfig should have quit after first response
. /run/net-*.conf
fi
}
# Wait for queued kernel/udev events
wait_for_udev()
{
command -v udevadm >/dev/null 2>&1 || return 0
udevadm settle ${1:+--timeout=$1}
}
# Find a specific fstab entry
# $1=mountpoint
# $2=fstype (optional)
# returns 0 on success, 1 on failure (not found or no fstab)
read_fstab_entry() {
# Not found by default.
found=1
for file in ${rootmnt?}/etc/fstab; do
if [ -f "$file" ]; then
# shellcheck disable=SC2034
while read -r MNT_FSNAME MNT_DIR MNT_TYPE MNT_OPTS MNT_FREQ MNT_PASS MNT_JUNK; do
case "$MNT_FSNAME" in
""|\#*)
continue;
;;
esac
if [ "$MNT_DIR" = "$1" ]; then
if [ -n "$2" ]; then
[ "$MNT_TYPE" = "$2" ] || continue;
fi
found=0
break 2
fi
done < "$file"
fi
done
return $found
}
# Resolve device node from a name. This expands any LABEL or UUID.
# $1=name
# Resolved name is echoed.
resolve_device() {
DEV="$1"
case "$DEV" in
LABEL=* | UUID=* | PARTLABEL=* | PARTUUID=*)
DEV="$(blkid -l -t "$DEV" -o device)" || return 1
;;
esac
[ -e "$DEV" ] && echo "$DEV"
}
# Check a file system.
# $1=device
# $2=mountpoint (for diagnostics only)
# $3=type (may be "auto")
_checkfs_once()
{
DEV="$1"
NAME="$2"
TYPE="$3"
if [ "$NAME" = "/" ] ; then
NAME="root"
fi
FSCK_LOGFILE=/run/initramfs/fsck.log
FSCK_STAMPFILE=/run/initramfs/fsck-${NAME#/}
if [ "${TYPE}" = "auto" ]; then
TYPE="$(get_fstype "${DEV}")"
fi
FSCKCODE=0
if [ -z "${TYPE}" ]; then
log_warning_msg "Type of $NAME file system is unknown, so skipping check."
return
fi
if ! command -v fsck >/dev/null 2>&1; then
log_warning_msg "fsck not present, so skipping $NAME file system"
return
fi
if [ "${fastboot?}" = "y" ] ; then
log_warning_msg "Fast boot enabled, so skipping $NAME file system check."
return
fi
if [ "${forcefsck?}" = "y" ]
then
force="-f"
else
force=""
fi
if [ "${fsckfix?}" = "y" ]
then
fix="-y"
elif [ "${fsckfix?}" = "n" ]
then
fix="-n"
else
fix="-a"
fi
spinner=""
if [ -z "${debug?}" ]; then
spinner="-C"
fi
if [ "${quiet}" = n ]
then
log_begin_msg "Will now check $NAME file system"
logsave -a -s $FSCK_LOGFILE fsck $spinner $force $fix -V -t "$TYPE" "$DEV"
FSCKCODE=$?
log_end_msg
else
log_begin_msg "Checking $NAME file system"
logsave -a -s $FSCK_LOGFILE fsck $spinner $force $fix -T -t "$TYPE" "$DEV"
FSCKCODE=$?
log_end_msg
fi
# NOTE: "failure" is defined as exiting with a return code of
# 4, possibly or-ed with other flags. A return code of 1
# indicates that file system errors were corrected but that
# the boot may proceed.
#
if [ "$FSCKCODE" -eq 32 ]
then
log_warning_msg "File system check was interrupted by user"
elif [ $((FSCKCODE & 4)) -eq 4 ]
then
log_failure_msg "File system check of the $NAME filesystem failed"
return 1
elif [ "$FSCKCODE" -gt 1 ]
then
log_warning_msg "File system check failed but did not detect errors"
sleep 5
else
true > $FSCK_STAMPFILE
fi
return 0
}
checkfs()
{
while ! _checkfs_once "$@"; do
panic "The $2 filesystem on $1 requires a manual fsck"
done
}
# Mount a file system. We parse the information from the fstab. This
# should be overridden by any boot script which can mount arbitrary
# filesystems such as /usr. This default implementation delegates to
# local or nfs based upon the filesystem type.
# $1=mountpoint mount location
mountfs()
{
type=local
read_fstab_entry "$1"
if [ "${MNT_TYPE}" = "nfs" ] || [ "${MNT_TYPE}" = "nfs4" ]; then
type=nfs
fi
${type}_mount_fs "$1"
}
# Mount the root file system. It should be overridden by all
# boot scripts.
mountroot()
{
:
}
# Run /scripts/${boot}-top. This should be overridden by all boot
# scripts.
mount_top()
{
:
}
# Run /scripts/${boot}-premount. This should be overridden by all boot
# scripts.
mount_premount()
{
:
}
# Run /scripts/${boot}-bottom. This should be overridden by all boot
# scripts.
mount_bottom()
{
:
}
| .. | |||||
| init-bottom | |||||
| init-top | |||||
| local-bottom | |||||
| local-premount | |||||
| functions | |||||
| local | |||||
| nfs |