#!/bin/bash

TOOLS="dmidecode lshw bc"
for tool in ${TOOLS}
do
  if ! which $tool > /dev/null
  then
    echo $tool fehlt.
    exit 1
  fi
done

HOSTNAME=$(hostname -f)
OUTFILE=$HOSTNAME-wikidoku.txt

echo "Achtung: Bitte die generierte Datei $OUTFILE überprüfen und anpassen!"

cat > $OUTFILE <<EOF
== Kurzinfo ==

* ...

EOF

MANUFACTURER=$(dmidecode | grep "System Information" -A 5  | grep Manufacturer | cut -d: -f2 | sed -e 's/^\ //')
PRODUCTNAME=$(dmidecode | grep "System Information" -A 5  | grep "Product Name" | cut -d: -f2 | sed -e 's/^\ //')
CPUCOUNT=$(lscpu | grep '^CPU(s):' | awk '{ print $2 }')
CPUMODEL=$(lscpu | grep 'Model name:' | sed -re 's/Model name:\s+//g')
MEMORY=$(lshw -C memory | grep -A10 '*-memory' | grep 'size:' | awk '{ print $2 }')
HDDSIZE=$(lsblk -b --output NAME,SIZE | grep -v '─' | grep -v NAME | awk '{print $2}' | sed ':a;N;$!ba;s/\n/+/g' | bc |  awk '{ byte =$1 /1024/1024^2 ; print byte " GB" }')

cat >> $OUTFILE <<EOF
== Hardware ==

* ${MANUFACTURER} ${PRODUCTNAME}
* ${CPUCOUNT} x ${CPUMODEL}
* ${MEMORY} RAM
* ${HDDSIZE} HDD

EOF

cat >> $OUTFILE <<EOF
== Filesystem ==

{| class="wikitable"
! Device
! Mountpoint
! Grösse
! Beschreibung
EOF

df -h | grep -v tmpfs | grep -v udev | grep -v ^Filesystem | while read line
do
  DEVICE=$(echo $line | awk '{print $1}')
  SIZE=$(echo $line | awk '{print $2}')
  MOUNTPOINT=$(echo $line | awk '{print $6}')
  echo "|-"          >> $OUTFILE
  echo "| ${DEVICE}" >> $OUTFILE
  echo "| ${MOUNTPOINT}" >> $OUTFILE
  echo "| ${SIZE}"   >> $OUTFILE 
  echo "| ..."       >> $OUTFILE 
done

SWAPDEV=$(grep SWAP /etc/fstab | awk '{print $1}')
SWAPDEVSIZE=$(free -m | grep ^Swap: | awk '{print $2}')

echo "|-"                >> $OUTFILE
echo "| ${SWAPDEV}"      >> $OUTFILE
echo "| none"            >> $OUTFILE
echo "| ${SWAPDEVSIZE}M"  >> $OUTFILE
echo "| Swap Space"      >> $OUTFILE

cat >> $OUTFILE <<EOF
|-
|}

EOF

cat >> $OUTFILE <<EOF
== Netzwerk ==

{| class="wikitable"
! Device
! IP/Mask
! Hostname
! Beschreibung
EOF

for line in $(ip a s | grep '^[0-9]' | awk '{ print $2 }' | grep -v lo | sed -e 's/\:$//')
do
  rows=$(ip a s $line | grep inet | sed -re 's/.*inet6?//' | awk '{ print $1 }' | grep -v '^fe80:' | wc -l)
  if [[ "$rows" -eq 0 ]]; then
    echo "|-"              >> $OUTFILE
    echo "| '''${line}'''" >> $OUTFILE
    echo "| "              >> $OUTFILE
    echo "| "              >> $OUTFILE
    echo "| ..."           >> $OUTFILE
    continue
  fi
  echo "|-"                                >> $OUTFILE
  echo "|rowspan="${rows}"| '''${line}'''" >> $OUTFILE
  for inet in $(ip a s $line | grep inet | sed -re 's/.*inet6?//' | awk '{ print $1 }' | grep -v '^fe80:'); do
    IFADDR=$(echo $inet | cut -d/ -f1)
    IFCIDR=$(echo $inet | cut -d/ -f2)
    IFHOSTNAME=$(getent hosts "${IFADDR}" | head -1 | awk '{ print $2 }')
    echo "| ${IFADDR}/${IFCIDR}" >> $OUTFILE
    echo "| ${IFHOSTNAME}"       >> $OUTFILE
    echo "| ..."                 >> $OUTFILE
    echo "|-"                    >> $OUTFILE
  done
done

cat >> $OUTFILE <<EOF
|}

EOF

DEFAULTGW=$(ip route show default | grep ^default | awk '{print $3}')
DEFAULTIF=$(ip route show default | grep ^default | awk '{print $5}')
DEFAULTIFIP=$(ip a s dev ${DEFAULTIF} | grep inet | head -n1 | awk '{print $2}' | cut -d"/" -f1)
echo "* '''Gateway:''' ${DEFAULTIF} ${DEFAULTGW}" >> $OUTFILE

cat >> $OUTFILE <<EOF
== User mit Login Shell ==

In folgender Tabelle alle User mit '''gültiger Loginshell''' (z.B. /bin/sh, /bin/bash, /bin/zsh) sowie '''gültigem Passwort''' (z.B. Eintrag in /etc/shadow) aufführen.

{| class="wikitable"
! Username
! Login Shell
! Zweck
EOF

grep -e "sh$" /etc/passwd | while read line
do
  USRNAME=$(echo $line | cut -d: -f1)
  USRSHELL=$(echo $line | cut -d: -f7)
  USRSHADOW=$(grep ${USRNAME} /etc/shadow | cut -d: -f2)
  if [[ ${USRSHADOW} = '!' ]]
  then
    continue
  fi
  echo "|-"              >> $OUTFILE
  echo "| ${USRNAME}"    >> $OUTFILE
  echo "| ${USRSHELL}"   >> $OUTFILE
  echo "| ..."           >> $OUTFILE
done

cat >> $OUTFILE <<EOF
|-
|}

EOF

cat >> $OUTFILE <<EOF
== Sonstiges ==
* ...

=== Dienste ===
* SSH

== Backup ==
* 

== Zugänge ==
* SSH

EOF

if [ -e /dev/ipmi0 -o -e /dev/ipmi/0 ]
then
  ILOIP=$(ipmitool lan print | grep '^IP Address' | grep -v Source | awk '{print $4}')

  cat >> $OUTFILE <<EOF
== Management Module ==
'''Zugangsmöglichkeiten:'''

* SSH (TCP Port 22): ssh root/Administrator@${ILOIP}
* Web (TCP Port 443): https://${ILOIP}

EOF

fi

OS=$(lsb_release -i | sed -re 's/Distributor ID:\s+//g')
OSCODENAME=$(lsb_release -c | sed -re 's/Codename:\s+//g')

echo "[[Category:Systemdokumentation]]" >> $OUTFILE
if [[ -z "${OSCODENAME}" || "${OSCODENAME}" == "n/a" ]]; then
  echo "[[Category:${OS^}]]" >> $OUTFILE
else
  echo "[[Category:${OS^}:${OSCODENAME^}]]" >> $OUTFILE
fi