[prog] bash, reading and displaying hex
John Clarke
johnc+linuxchix at kirriwa.net
Mon Nov 10 11:05:14 EST 2003
On Sun, Nov 09, 2003 at 07:21:46 +0100, Hamster wrote:
> Does anyone know of a way in which I can get the variable "offset" to
> contain the hex value that dd reads?? Or is this something bash
You could use od:
[johnc at dropbear ~]$ echo -n ^H>temp
[johnc at dropbear ~]$ od -t x1 temp
0000000 08
0000001
(if anyone's wondering how I entered control-h into the shell, I used
control-v followed by control-h).
Now without the addresses:
[johnc at dropbear ~]$ od -A n -t x1 temp
08
And finally assign it to a variable:
[johnc at dropbear ~]$ offset=`dd if=temp count=1 bs=1|od -A n -t x1`
[johnc at dropbear ~]$ echo $offset
08
To include the '0x' prefix, change od's output format to unsigned
decimal and use printf instead of echo:
[johnc at dropbear ~]$ offset=`dd if=temp count=1 bs=1|od -A n -t u1`
[johnc at dropbear ~]$ printf "0x%02x\n" $offset
0x08
Cheers,
John
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