sed with several lines, how?

[Arthur Bela]

thank you, and sorry, if i had formulated wrong, but the "SOMETEXT#X"
is a random STRING, like:

$ cat testfile.txt
alsjflsajfkljasdf
<br><font size=3>asfklasjlkyxcvo</font><br>
<br><font size=3>kldfjlkasjdfasdf</font><br>
kasfjxcvklajdflas

yxcvkjasafjads
<br><font size=3>asdfjkldjlasj</font><br>
</font></div></body></html>
uiyxzckjhasfsd
$



$ awk 'BEGIN {sawpattern=0} "^SOMETEXT, ^SOMETEXT" {if (($0
~/<br><font size=3>SOMETEXT/ ) && (sawpattern == 0)) {sawpattern=1}
else {sawpattern=0;print $0}}' testfile.txt
alsjflsajfkljasdf
<br><font size=3>asfklasjlkyxcvo</font><br>
<br><font size=3>kldfjlkasjdfasdf</font><br>
kasfjxcvklajdflas

yxcvkjasafjads
<br><font size=3>asdfjkldjlasj</font><br>
</font></div></body></html>
uiyxzckjhasfsd
$



On 27 November 2010 13:36, Christopher Chan
<christopher.chan at bradbury.edu.hk> wrote:
> On Saturday, November 27, 2010 07:39 PM, Arthur Bela wrote:
>> hyphen's [ - ] are just for marking the start/end of a pattern, but
>> there are _not in_ the pattern!
>> "OUTPUT" is what i want after "seding" the PATTERN#X's
>>
>>
>> so i for e.g.: need the first, and second "magic"
>> sed "FIRSTMAGIC" PATTERN#1
>> sed "SECONDMAGIC" PATTERN#2
>>
>>
>>
>>
>> PATTERN#1:
>>
>> -----------------------------------
>> SOMETEXT#1
>> <br><font size=3>SOMETEXT#2</font><br>
>> <br><font size=3>SOMETEXT#3</font><br>
>> SOMETEXT#4
>> -----------------------------------
>>
>> "exact pattern", what is unique from the pattern:
>> -----------------------------------
>> </font><br>\n<br><font size=3>
>> -----------------------------------
>>
>> OUTPUT:
>> -----------------------------------
>> SOMETEXT#1
>> <br><font size=3>SOMETEXT#3</font><br>
>> SOMETEXT#4
>> -----------------------------------
>>
>>
>>
>>
>>
>> and:
>>
>> PATTERN#2:
>>
>> -----------------------------------
>> SOMETEXT#1
>> <br><font size=3>SOMETEXT#2</font><br>
>> </font></div></body></html>
>> SOMETEXT#3
>> -----------------------------------
>>
>> "exact pattern", what is unique from the pattern:
>> -----------------------------------
>> </font><br>\n</font></div></body></html>
>> -----------------------------------
>>
>> OUTPUT:
>> -----------------------------------
>> SOMETEXT#1
>> </font></div></body></html>
>> SOMETEXT#3
>> -----------------------------------
>>
>>
>> i just can't figure it out, how to "sed" when having several lines
>> [nor in awk, perl..]
>>
>
> Impossible with sed. You can use awk.
>
> Output of: 'cat testpart'
>
> SOMETEXT#1
> <br><font size=3>SOMETEXT#2</font><br>
> <br><font size=3>SOMETEXT#3</font><br>
> SOMETEXT#4
>
> SOMETEXT#1
> <br><font size=3>SOMETEXT#2</font><br>
> </font></div></body></html>
> SOMETEXT#3
>
> Output of: awk 'BEGIN {sawpattern=0} "^SOMETEXT, ^SOMETEXT" {if (($0 ~
> /<br><font size=3>SOMETEXT/ ) && (sawpattern == 0)) {sawpattern=1} else
> {sawpattern=0;print $0}}' testpart
>
> SOMETEXT#1
> <br><font size=3>SOMETEXT#3</font><br>
> SOMETEXT#4
>
> SOMETEXT#1
> </font></div></body></html>
> SOMETEXT#3
>
> That seems to be what you are looking for.
>
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