e +4 nu +1 si e modulo 0x100 ca sa nu ai :100 la final.
2016-03-31 10:41 GMT+01:00 Mircea Ciocan <[email protected]>:
> Da' fuck:
>
> # echo "FF"| awk -F':' '{printf ("%02X\n", (("0x"$1)+4)%0x100);}'
> 03
>
> Undeva e o eroare aritmetica !!!
>
>
> Mircea "si ala lungu nu merge :(((" C.
>
>
>
> 2016-03-31 11:35 GMT+02:00 Catalin Muresan <[email protected]>:
>
> > Merge si fara sprinttf.
> >
> > [cata@lemon ~]$ echo "FF"| awk -F':' '{printf ("%02X\n",
> > (("0x"$1)+4)%0x100
> > );}'
> > 04
> >
> >
> > 2016-03-31 10:31 GMT+01:00 Petru Rațiu <[email protected]>:
> >
> > > 2016-03-31 12:24 GMT+03:00 Petru Rațiu <[email protected]>:
> > >
> > > > Mi-e lene sa fac proof of concept acu, da' as scoate doopunctele, as
> > face
> > > > increment si le-as pune la loc.
> > > >
> > > > Aaaa, zici ca stii tu sigur ca nu face overflow? vezi ca gawk stie de
> > > > strtonum:
> > > >
> > > > echo AF | gawk ' { printf "%X\n", strtonum("0x"$1)+2 }'
> > > > B1
> > > >
> > >
> > > M-am scos si cu old-school awk: echo AF | busybox awk ' { printf
> "%X\n",
> > > sprintf("0x"$1)+2 }'
> > >
> > > --
> > > P.
> > >
> > > 2016-03-31 12:06 GMT+03:00 Mircea Ciocan <[email protected]>:
> > >
> > > > Ajutati si voi un om batran si mai apropriat de hw decat de sed si
> awk:
> > > >
> > > > am un shell deosebit de castrat pe un device, fara aritmetica si fara
> > cut
> > > > si o adresa de Ethernet MAC intr-o variabila de tipul:
> > > >
> > > > MAC0="00:70:80:90:A0:5A"
> > > >
> > > > vreau sa incrementez ultimul numar ( se presupune ca nu va face
> > overflow)
> > > > cu 2 si in exemplul de mai sus sa iasa:
> > > >
> > > > MAC2="00:70:80:90:A0:5C"
> > > >
> > > > cum Doamne iarta-ma fac asta cu awk si/sau sed
> > > >
> > > >
> > > > Mircea "let's castrate the shells" C.
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