Re^3: Perl Unpack Cobol Binary File and Fields


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Re^3: Perl Unpack Cobol Binary File and Fields

by soonix (Canon)

on May 04, 2020 at 18:55 UTC ( [id://11116447]=note: print w/replies, xml )

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in reply to Re^2: Perl Unpack Cobol Binary File and Fields
in thread Perl Unpack Cobol Binary File and Fields

hexdump -c -n 34 sltywk_binary_new
0000000 \0 \0 001 257 \a 344 \0 003 \0 \0 \0 s \0 6 002 267
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My hexdump-fu probably is a bit rusty, but how would hexdump -c give bytes like 257, 344 or 267?

I prefer hexdump -C anyway...

Or better: which variant of the hexdump-tool is this?

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Re^4: Perl Unpack Cobol Binary File and Fields
by Fletch (Bishop) on May 04, 2020 at 19:48 UTC

I'm guessing they're octal by some weird default. I was able to make similar output making up a dummy file using that presumption (entering his numbers using hexl-mode in emacs) that produced similar output on OS X with the default /usr/bin/hexdump. I'm partial to od -xa myself.

$ hexdump -c foo
0000000  \0  \0 001 257  \n 344  \0 003  \0  \0  \0   s  \0 006 002 26
+7
0000010
$ od -xa foo
0000000      0000    af01    e40a    0300    0000    7300    0600    b
+702
         nul nul soh  af  nl  e4 nul etx nul nul nul   s nul ack stx  
+b7
0000020
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Edit: Derp, his \a should of course be 0x07 not \n / 0x0a. I need moar caffeine . . .

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