#! /bin/csh
#
# Meno: Beno David, kr. 2
# Kruzok: 02
# Datum: pripravne_csh (id: 6)
# Zadanie: zadanie23
#
# Text zadania:
#
# Zistite, ktori pouzivatelia sa hlasia na osu v noci (teda cas prihlasenia je
# od 22:00 do 05:00). Do uvahy berte len ukoncene spojenia za poslednu dobu
# (odkedy system zaznamenava tieto informacie).
# Ak bude skript spusteny s parametrom -n <pocet>, zistite, ktori pouzivatelia
# sa na osu prihlasili v noci viac ako <pocet> krat.
# Dodrzte format vystupu uvedeny v priklade.
# Pomocka: pouzite prikaz last
#
# Syntax:
# zadanie1.csh [-h] [-n <pocet>]
#
# Format vypisu bude nasledovny:
# Output: '<meno pouzivatela> <pocet nocnych prihlaseni> <datum a cas posledneho
nocneho prihlasenia>'
#
# Priklad vystupu:
# Output: 'sedlacek 5 03-23 23:12'
# Output: 'tubel 2 03-23 22:55'
# Output: 'kubikm 4 03-23 02:31'
#
#
# Program musi osetrovat pocet a spravnost argumentov. Program musi mat help,
# ktory sa vypise pri zadani argumentu -h a ma tvar:
# Meno programu (C) meno autora
#
# Usage: <meno_programu> <arg1> <arg2> ...
#    <arg1>: xxxxxx
#    <arg2>: yyyyy
#
# Parametre uvedene v <> treba nahradit skutocnymi hodnotami.
# Ked ma skript prehladavat adresare, tak vzdy treba prehladat vsetky zadane
# adresare a vsetky ich podadresare do hlbky.
# Pri hladani maxim alebo minim treba vzdy najst maximum (minimum) vo vsetkych
# zadanych adresaroch (suboroch) spolu. Ked viacero suborov (adresarov, ...)
# splna maximum (minimum), treba vypisat vsetky.
#
# Korektny vystup programu musi ist na standardny vystup (stdout).
# Chybovy vystup programu by mal ist na chybovy vystup (stderr).
# Chybovy vystup musi mat tvar (vratane apostrofov):
# Error: 'adresar, subor, ... pri ktorom nastala chyba': popis chyby ...
# Ak program pouziva nejake pomocne vypisy, musia mat tvar:
# Debug: vypis ...
#
# Poznamky: (sem vlozte pripadne poznamky k vypracovanemu zadaniu)
#
# Riesenie:


@ n = 0
while($#argv>0)

  if(("$argv[1]" != "-h") && ("$argv[1]" != "-n")) then
   echo "Error: 'zly prepinac'" > /dev/stderr
   exit 1
  endif

  if($argv[1] == '-h') then
     echo "Zadanie (C) Beno David"
     echo ""
     echo "Usage: test <-h> <-n> <pocet>"
     echo "   <-h>: help"
     echo "   <-n>: pocet prihlaseni"
     exit 0
  endif

  if($argv[1] == '-n') then
     shift argv
     if($#argv == 0) then
       echo "Error: 'Za n musi byt cislo'" > /dev/stderr
       exit 1
     endif
     expr "$argv[1]" + 1 >& /dev/null
     if($status != 0) then
       echo "Error: 'Za n musi byt cislo'" > /dev/stderr
       exit 1
     endif
     set n=$argv[1]
  endif


  shift argv
end

if($n < 0) then
  echo "Error: '-n': zaporna hodnota" > /dev/stderr
  exit 1
endif

foreach meno(`last | cut -d " " -f1 | sort | uniq | grep -v "shutdown" | grep -v ^$ | grep -v "wtmp"`)
  set pocet=`last | tr -s " " | grep -v "still logged in" | grep "^$meno " | rev | cut -d " " -f4,5,6 | rev | grep '2[23]:..\|0[01234]:..' | wc -l`

  if($pocet > $n) then

    set posl = `last | tr -s " " | grep -v "still logged in" | grep "^$meno " | rev | cut -d " " -f4,5,6 | rev | grep '2[23]:..\|0[01234]:..' | head -1`
    set mesiac = $posl[1]


     if($mesiac == "Jan") then
       set mesiac = "01"
     else if($mesiac == "Feb") then
       set mesiac = "02"
     else if($mesiac == "Mar") then
       set mesiac = "03"
     else if($mesiac == "Apr") then
       set mesiac = "04"
     else if($mesiac == "May") then
       set mesiac = "05"
     else if($mesiac == "Jun") then
       set mesiac = "06"
     else if($mesiac == "Jul") then
       set mesiac = "07"
     else if($mesiac == "Aug") then
       set mesiac = "08"
     else if($mesiac == "Sep") then
       set mesiac = "09"
     else if($mesiac == "Oct") then
       set mesiac = "10"
     else if($mesiac == "Nov") then
       set mesiac = "11"
     else if($mesiac == "Dec") then
       set mesiac = "12"
     endif


 set den = $posl[2]

      if($den == "1") then
        set den = "01"
      else if($den == "2") then
        set den = "02"
      else if($den == "3") then
        set den = "03"
      else if($den == "4") then
        set den = "04"
      else if($den == "5") then
        set den = "05"
      else if($den == "6") then
        set den = "06"
      else if($den == "7") then
        set den = "07"
      else if($den == "8") then
        set den = "08"
      else if($den == "9") then
        set den = "09"
      endif
    set cas=$posl[3]
  echo "Output: '$meno $pocet $mesiac-$den $cas'"
 endif
end