DRIVER=serial8250
MODALIAS=platform:serial8250
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#
# This comes from the dracut-logger.sh
#
# The logger defined 4 logging levels:
#   - ddebug (4)
#     The DEBUG Level designates fine-grained informational events that are most
#     useful to debug an application.
#   - dinfo (3)
#     The INFO level designates informational messages that highlight the
#     progress of the application at coarse-grained level.
#   - dwarn (2)
#     The WARN level designates potentially harmful situations.
#   - derror (1)
#     The ERROR level designates error events that might still allow the
#     application to continue running.
#
# Logging is controlled by following global variables:
#   - @var kdump_stdloglvl - logging level to standard error (console output)
#   - @var kdump_sysloglvl - logging level to syslog (by logger command)
#   - @var kdump_kmsgloglvl - logging level to /dev/kmsg (only for boot-time)
#
# If any of the variables is not set, the function dlog_init() sets it to default:
#   - In the first kernel:
#     - @var kdump_stdloglvl = 3 (info)
#     - @var kdump_sysloglvl = 0 (no logging)
#     - @var kdump_kmsgloglvl = 0 (no logging)
#
#   -In the second kernel:
#    - @var kdump_stdloglvl = 0 (no logging)
#    - @var kdump_sysloglvl = 3 (info)
#    - @var kdump_kmsgloglvl = 0 (no logging)
#
# First of all you have to start with dlog_init() function which initializes
# required variables. Don't call any other logging function before that one!
#
# The code in this file might be run in an environment without bash.
# Any code added must be POSIX compliant.

# Define vairables for the log levels in this module.
kdump_stdloglvl=""
kdump_sysloglvl=""
kdump_kmsgloglvl=""

# The dracut-lib.sh is only available in the second kernel, and it won't
# be used in the first kernel because the dracut-lib.sh is invisible in
# the first kernel.
if [ -f /lib/dracut-lib.sh ]; then
    . /lib/dracut-lib.sh
fi

# @brief Get the log level from kernel command line.
# @retval 1 if something has gone wrong
# @retval 0 on success.
#
get_kdump_loglvl()
{
    [ -f /lib/dracut-lib.sh ] && kdump_sysloglvl=$(getarg rd.kdumploglvl)
    [ -z "$kdump_sysloglvl" ] && return 1;

    if [ -f /lib/dracut-lib.sh ] && ! isdigit "$kdump_sysloglvl"; then
        return 1
    fi

    return 0
}

# @brief Check the log level.
# @retval 1 if something has gone wrong
# @retval 0 on success.
#
check_loglvl()
{
    case "$1" in
        0|1|2|3|4)
            return 0
           ;;
        *)
            return 1
            ;;
        esac
}

# @brief Initializes Logger.
# @retval 1 if something has gone wrong
# @retval 0 on success.
#
dlog_init() {
    ret=0

    if [ -s /proc/vmcore ];then
        if ! get_kdump_loglvl; then
            logger -t "kdump[$$]" -p warn -- "Kdump is using the default log level(3)."
            kdump_sysloglvl=3
        fi
        kdump_stdloglvl=0
        kdump_kmsgloglvl=0
    else
        kdump_stdloglvl=$KDUMP_STDLOGLVL
        kdump_sysloglvl=$KDUMP_SYSLOGLVL
        kdump_kmsgloglvl=$KDUMP_KMSGLOGLVL
    fi

    [ -z "$kdump_stdloglvl" ] && kdump_stdloglvl=3
    [ -z "$kdump_sysloglvl" ] && kdump_sysloglvl=0
    [ -z "$kdump_kmsgloglvl" ] && kdump_kmsgloglvl=0

    for loglvl in "$kdump_stdloglvl" "$kdump_kmsgloglvl" "$kdump_sysloglvl"; do
        if ! check_loglvl "$loglvl"; then
            echo "Illegal log level: $kdump_stdloglvl $kdump_kmsgloglvl $kdump_sysloglvl"
            return 1
        fi
    done

    # Skip initialization if it's already done.
    [ -n "$kdump_maxloglvl" ] && return 0

    if [ "$UID" -ne 0 ]; then
        kdump_kmsgloglvl=0
        kdump_sysloglvl=0
    fi

    if [ "$kdump_sysloglvl" -gt 0 ]; then
        if [ -d /run/systemd/journal ] \
            && systemd-cat --version 1>/dev/null 2>&1 \
            && systemctl --quiet is-active systemd-journald.socket 1>/dev/null 2>&1; then
            readonly _systemdcatfile="/var/tmp/systemd-cat"
            mkfifo "$_systemdcatfile" 1>/dev/null 2>&1
            readonly _dlog