/media/sda-magnetic/david/Dokumente-15/fernuni-hagen/cs-i-ii/fsm/fsm/lex-yacc-bash-etc/all00024.txt

# client 
# sender 
# recipient
# relay

smptd_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

# pemit_mynetworks
# check_policy_service

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

# hostname 
# reject_unknown_client_hostname
# reject_unknown_reverse_client_hostname
# reject_unknown_hostname
# reject_invalid_hostname
# reject_non_fqd_hostname
# reject_unknown_helo_hostname 

# non_fqdn
# reject_non_fqdn_hostname
# reject_non_fqdn_sender
# reject_non_fqdn_recipient

# sender
# reject_non_fqdn_sender
# reject_unknown_sender_domain

# recipient
# reject_non_fqdn_recipient
# reject_unknown_recipient_domain

# unauth
# reject_unauth_pipelining
# reject_unauth_destination

a CAPABILITY
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 statement 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 "Ausgabe"
# Kommentar

var1=Hallo
var2=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 "1 " "2 " "3 "
do
    echo $var3
done

typeset -i i=5
i=$(( 4 ))
i=$(( 4+4 ))

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