dracut/test/TEST-20-NFS/client-init.sh

#!/bin/sh
getcmdline() {
    while read -r _line || [ -n "$_line" ]; do
        printf "%s" "$_line"
    done < /proc/cmdline
}

_dogetarg() {
    local _o _val _doecho
    unset _val
    unset _o
    unset _doecho
    CMDLINE=$(getcmdline)

    for _o in $CMDLINE; do
        if [ "${_o%%=*}" = "${1%%=*}" ]; then
            if [ -n "${1#*=}" -a "${1#*=*}" != "${1}" ]; then
                # if $1 has a "=<value>", we want the exact match
                if [ "$_o" = "$1" ]; then
                    _val="1"
                    unset _doecho
                fi
                continue
            fi

            if [ "${_o#*=}" = "$_o" ]; then
                # if cmdline argument has no "=<value>", we assume "=1"
                _val="1"
                unset _doecho
                continue
            fi

            _val="${_o#*=}"
            _doecho=1
        fi
    done
    if [ -n "$_val" ]; then
        [ "x$_doecho" != "x" ] && echo "$_val"
        return 0
    fi
    return 1
}

getarg() {
    local _deprecated _newoption
    while [ $# -gt 0 ]; do
        case $1 in
            -d)
                _deprecated=1
                shift
                ;;
            -y)
                if _dogetarg $2 > /dev/null; then
                    if [ "$_deprecated" = "1" ]; then
                        [ -n "$_newoption" ] && warn "Kernel command line option '$2' is deprecated, use '$_newoption' instead." || warn "Option '$2' is deprecated."
                    fi
                    echo 1
                    return 0
                fi
                _deprecated=0
                shift 2
                ;;
            -n)
                if _dogetarg $2 > /dev/null; then
                    echo 0
                    if [ "$_deprecated" = "1" ]; then
                        [ -n "$_newoption" ] && warn "Kernel command line option '$2' is deprecated, use '$_newoption=0' instead." || warn "Option '$2' is deprecated."
                    fi
                    return 1
                fi
                _deprecated=0
                shift 2
                ;;
            *)
                if [ -z "$_newoption" ]; then
                    _newoption="$1"
                fi
                if _dogetarg $1; then
                    if [ "$_deprecated" = "1" ]; then
                        [ -n "$_newoption" ] && warn "Kernel command line option '$1' is deprecated, use '$_newoption' instead." || warn "Option '$1' is deprecated."
                    fi
                    return 0
                fi
                _deprecated=0
                shift
                ;;
        esac
    done
    return 1
}

getargbool() {
    local _b
    unset _b
    local _default
    _default="$1"
    shift
    _b=$(getarg "$@")
    [ $? -ne 0 -a -z "$_b" ] && _b="$_default"
    if [ -n "$_b" ]; then
        [ $_b = "0" ] && return 1
        [ $_b = "no" ] && return 1
        [ $_b = "off" ] && return 1
    fi
    return 0
}
export PATH=/sbin:/bin:/usr/sbin:/usr/bin
exec > /dev/console 2>&1
export TERM=linux
export PS1='initramfs-test:\w\$ '
CMDLINE=$(while read line || [ -n "$line" ]; do echo $line; done < /proc/cmdline)
strstr() { [ "${1##*"$2"*}" != "$1" ]; }

stty sane
if getargbool 0 rd.shell; then
    [ -c /dev/watchdog ] && printf 'V' > /dev/watchdog
    strstr "$(setsid --help)" "control" && CTTY="-c"
    setsid $CTTY sh -i
fi

echo "made it to the rootfs! Powering down."

while read dev fs fstype opts rest || [ -n "$dev" ]; do
    [ "$fstype" != "nfs" -a "$fstype" != "nfs4" ] && continue
    echo "nfs-OK $dev $fstype $opts" | dd oflag=direct,dsync of=/dev/sda
    break
done < /proc/mounts
> /dev/watchdog
poweroff -f