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View File Name : 50-landscape-sysinfo

#!/bin/sh

# don't try refresh this more than once per minute
# Due to cpu consumption and login delays (LP: #1893716)
CACHE="/var/lib/landscape/landscape-sysinfo.cache"
HAS_CACHE="FALSE"
CACHE_NEEDS_UPDATE="FALSE"

[ -r "$CACHE" ] && HAS_CACHE="TRUE"
[ -z "$(find "$CACHE" -newermt 'now-1 minutes' 2> /dev/null)" ] && CACHE_NEEDS_UPDATE="TRUE"

if [ "$HAS_CACHE" = "TRUE" ] && [ "$CACHE_NEEDS_UPDATE" = "FALSE" ]; then
    cat "$CACHE"
else
    SYSINFO=""

    # pam_motd does not carry the environment
    [ -f /etc/default/locale ] && . /etc/default/locale
    export LANG
    CORES=$(grep -c ^processor /proc/cpuinfo 2>/dev/null)
    [ "$CORES" -eq "0" ] && CORES=1
    THRESHOLD="${CORES:-1}.0"

    if [ $(echo "`cut -f1 -d ' ' /proc/loadavg` < $THRESHOLD" | bc) -eq 1 ]; then
        SYSINFO=$(printf "\n System information as of %s\n\n%s\n" \
            "$(/bin/date)" \
            "$(/usr/bin/landscape-sysinfo)")
        echo "$SYSINFO" 2>/dev/null >"$CACHE" || true
        chmod 0644 "$CACHE" 2>/dev/null || true
    else
        SYSINFO=$(printf "\n System information disabled due to load higher than %s\n" "$THRESHOLD")

        if [ "$HAS_CACHE" = "TRUE" ]; then
            if ! grep -q "System information as of" $CACHE 2>/dev/null; then
                # do not replace a formerly good result due to load
                echo "$SYSINFO" 2>/dev/null >"$CACHE" || true
                chmod 0644 "$CACHE" 2>/dev/null || true
            else
                SYSINFO=$(cat "$CACHE")
            fi
        fi
    fi

    printf "%s\n" "$SYSINFO"
fi

exit 0