Preklopeni binarniho souboru do TXT

[Tom Meinlschmidt]

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 
===============================================================================