/media/sda-magnetic/david/Dokumente-15/fernuni-hagen/cs-i-ii/old-cs-2-01/informatik2/lex-yacc-bash-etc/all00014.txt

# client
# sender 
# recipient
# relay

smtpd_client_restrictions=
smtpd_sender_restrictions=
smtpd_recipient_restrictions=
smtpd_relay_restrictions=
smtpd_data_restrictions=
smtpd_end_of_data_restrictions=
smtpd_etrn_restrictions=
smtpd_helo_restrictions=

mynetworks=
myhostname=
smtpd_helo_required=yes

# permit_mynetworks
# check_policy_service

# unknown
# reject_unknown_client
# reject_unknown_client_hostname
# reject_unknwon_reverse_client_hostname
# reject_unknown_helo_hostname
# reject_unknown_hostname
# reject_unknown_sender_domain 
# reject_unknown_recipient_domain 

# hostname 
# reject_unknown_client_hostname
# reject_unknwon_reverse_client_hostname
# reject_unknown_hostname 
# reject_invalid_hostname
# reject_non_fqdn_hostname 
# reject_unknown_helo_hostname 

# non_fqdn 
# reject_non_fqdn_hostname
# reject_non_fqdn_sender
# reject_non_fqdn_recipient

# recipient
# reject_non_fqdn_recipient 
# reject_unknwon_recipient_domain 

# sender 
# reject_non_fqdn_sender 
# reject_unknown_sender_domain 

# unauth
# reject_unauth_pipelining
# reject_unauth_destination 

a CAPABLILTY
a LOGIN "user" "password"
a LIST "" *
a SELECT INBOX
a FETCH 1 RFC822
a STORE 1 +FLAGS (\Seen \Deleted)
a CLOSE
a EXPUNGE
a SEARCH
a LOGOUT

HELO/EHLO
MAIL
DATA 
RST
VRFY
EXPN
NOOP
QUIT

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%{
#include <stdio.h>
#include <ctype.h>
%}
%token NUMBER
%%
lines           :       lines expr '\n'     {printf("%d\n", $2);}
                |       lines '\n'
                ;
expr            :       expr '+' term       {$$=$1+$3;}
                |       expr '-' term       {$$=$1-$3;}
                |       term
                ;
term            :       term '*' factor     {$$=$1*$3;}
                |       term '/' factor     {$$=$1/$3;}
                |       factor
                ;
factor          :       '(' expr ')'        {$$=$2;}
                |       NUMBER
                ;
                
statement       ->      assignment | cond | loop
assignment      ->      id := expr
cond            ->      if boolexpr then statement fi |
                        if boolexpr then statement else statment fi
loop            ->      while boolexpr do statement od
expr            ->      boolexpr | numexpr
boolexpr        ->      numexpr cop numexpr
numexpr         ->      numexpr + term | term
term            ->      term * factor | factor
factor          ->      id | const | (numexpr)

./skript.sh
/bin/bash ./skript.sh
bash skript.sh

#!/bin/bash 

echo "Dies ist eine Ausgabe

# Dies ist ein Kommentar

var1=Hallo
var2="Hallo Welt"

echo $var1
echo $var2

if [ $var1 == $var2 ]
then 
    echo $var1
else
    echo $var2
fi

while [ $var1 == $var2 ]
do 
    echo $var1
done

for var3 in "a " "b " "c "
do
    echo $var3
done

typeset -i i=100

i=$(( 4+5 ))
i=$(( (4+5)*2 ))

while [ $i -le 50 ]
do
    echo $i
    i=$(( $i+1 ))
done