Preklopeni binarniho souboru do TXT

[Tom Meinlschmidt]

zkuste sam..

dd if=/dev/random of=file.txt bs=1024 count=64
cat file.txt | perl -⁠ne "print join(',',reverse(unpack('C*',$_)));"

a ted pro porovnani
hexdump file.txt | head -1

ja dostanu z perlu:
...,246,84,216,25,165,38,166,71,37,97,194,240,197,50,33,213,201,79,242,13,74,191,255,208,145(EOF)

a z hexdumpu
0000000 8c 58 a8 b2 55 dd c6 02 7b 59 79 ea 01 ba 98 9d

resp
hexdump -v -e '16/1 "%03u " "\n"' file.txt |head -1
140 088 168 178 085 221 198 002 123 089 121 234 001 186 152 157

coz proste nesedi s tim perlem. Perl by mel koncit na 088 140...

tm

On 2017-01-27 08:30, Jindroush wrote:
> Proc, co je v nem blbe? Proste vezme vstup a vypise ho jako dec cisla
> oddelena carkou, tak jsem pochopil zadani, na linuxu by nemelo vadit
> nejaky hrani s binary a tak...
> 
> On 27.1.2017 0:23, Tom Meinlschmidt wrote:
>> chyba.
>> 
>> ma byt hexdump -v -e '/1 "%03d" " “‘ … a "od -An -tuC"
>> 
>> jinak to bylo v osmickove..
>> 
>> btw - ten perl taky nefunguje spravne...
>> 
>> tm
>> 
>>> On Jan 27, 2017, at 0:02 , Tom Meinlschmidt <hw na meinlschmidt.org> 
>>> wrote:
>>> 
>>> test - 64kB soubor (data z /dev/random)
>>> 
>>> cat file.txt | hexdump -v -e '/1 "%03o" "\n"' | tac | xargs -n8 | tr 
>>> ' ' ','
>>> 
>>> real	0m26.837s
>>> user	0m7.769s
>>> sys	0m11.485s
>>> 
>>> bez zarovnavani na 8 sloupcu
>>> 
>>> cat file.txt | hexdump -v -e '/1 "%03o" " "' | tac -s’ ‘ | tr ‘ ‘ ‘,'
>>> 
>>> real	0m0.333s
>>> user	0m0.048s
>>> sys	0m0.022s
>>> 
>>> nebo
>>> 
>>> cat file.txt | od -An -b | cut -c 2- | tr ' ' '\n' | tac | xargs -n8 
>>> | tr ' ' ','
>>> 
>>> real	0m28.978s
>>> user	0m8.125s
>>> sys	0m12.093s
>>> 
>>> nebo
>>> 
>>> cat file.txt | od -An -b | cut -c 2- | tr '\n' ' ' | tac -s ' ' | tr 
>>> ' ' ‘,'
>>> 
>>> real	0m0.404s
>>> user	0m0.051s
>>> sys	0m0.028s
>>> 
>>> tm
>>> 
>>>> On Jan 26, 2017, at 22:05 , Admin HWnews <hwnews na cncnet.info> wrote:
>>>> 
>>>> Hmm prisel jsem na dalsi spek....
>>>> 
>>>> Ja bych ten soubor potreboval jeste prevratit...tedy aby posledni 
>>>> bajt byl prvni. Nejakej napad?
>>>> 
>>>> Prece to nebudu prohanet pres tabulku v DB...
>>>> 
>>>> RV
>>>> 
>>>> 
>>>> Dne 24.1.2017 v 17:51 Tom Meinlschmidt napsal(a):
>>>>> odvolavam, co jsem neslibil. mate pravdu - potrebuje to -v
>>>>> tm
>>>>> 
>>>>>> On Jan 24, 2017, at 17:37 , Tom Meinlschmidt <hw na meinlschmidt.org> 
>>>>>> wrote:
>>>>>> 
>>>>>> 
>>>>>> ? bash?
>>>>>> 
>>>>>> $ printf 'e\0\0\0cho a\0\0b\n' | hexdump -v -e '/1 "%03o" "\n"' | 
>>>>>> xargs -n8 | tr ' ' ','
>>>>>> 145,000,000,000,143,150,157,040
>>>>>> 141,000,000,142,012
>>>>>> 
>>>>>> tm
>>>>>> 
>>>>>> On 2017-01-24 17:24, Petr Simek wrote:
>>>>>>> On Tue, 24 Jan 2017, Tom Meinlschmidt wrote:
>>>>>>>> co treba
>>>>>>>> hexdump -e '/1 "%03o" "\n"' /bin/bash | xargs -n8 | tr ' ' ','
>>>>>>> Kdyz jsou v souboru dve nuly za sebou tak to prvni vypise jako 
>>>>>>> 060 a
>>>>>>> tu druhou jako * .
>>>>>>>> tm
>>>>>>> *------------------------------------------------------------------------*
>>>>>>> |                          Petr Simek   APS JU                    
>>>>>>>        |
>>>>>>> |                             psimek na jcu.cz                       
>>>>>>>        |
>>>>>>> *------------------------------------------------------------------------*
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>>> 
>>> --
>>> ===============================================================================
>>> Tomas Meinlschmidt, MS {MCT, MCP+I, MCSE, AER}, NetApp Filer/NetCache
>>> 
>>> www.meinlschmidt.com  www.maxwellrender.cz
>>> ===============================================================================
>>> 
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>>