/media/sda-magnetic/david/Dokumente-15/fernuni-hagen/cs-i-ii/fsm/fsm/bash-programming/lex-yacc-bash-etc/all00025.txt

# client
# sender
# recipient
# relay

smtpd_client_restrictions=
smptd_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_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_fqdn_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=abc

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

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

for var3 in "a " "x " "y "
do
    echo $var3
done

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

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