From: steve jenkin <sjenkin@canb.auug.org.au>
To: Computer Old Farts Followers <coff@tuhs.org>
Subject: [COFF] Re: Shell script advice: using 'dd' to write multiple media
Date: Tue, 27 Jun 2023 09:44:04 +1000 [thread overview]
Message-ID: <A4FD2EBC-BF62-426E-B02C-1D37B3F0D7E4@canb.auug.org.au> (raw)
In-Reply-To: <alpine.BSF.2.21.9999.2306270916210.50080@aneurin.horsfall.org>
Dave,
I’ve tried doing the ‘dd’ in a for or while loop many ways, many times.
Perhaps you could write & yesy a little demo script for me.
Say, “ls -1 | for (); do dd bs=10b; done”
cheers
steve
> On 27 Jun 2023, at 09:21, Dave Horsfall <dave@horsfall.org> wrote:
>
> Sounds like you want to put "dd" into a loop, driven by the block size and
> the media size, then using the "iseek" option on the input file to burrow
> through it.
>
> I would use "expr" for the arithmetic because I've never bothered to
> learn the Bash syntax :-)
>
> Or have I missed something?
>
> -- Dave
--
Steve Jenkin, IT Systems and Design
0412 786 915 (+61 412 786 915)
PO Box 38, Kippax ACT 2615, AUSTRALIA
mailto:sjenkin@canb.auug.org.au http://members.tip.net.au/~sjenkin
next prev parent reply other threads:[~2023-06-26 23:44 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-26 23:09 [COFF] " steve jenkin
2023-06-26 23:21 ` [COFF] " Dave Horsfall
2023-06-26 23:44 ` steve jenkin [this message]
2023-06-27 21:01 ` Dave Horsfall
2023-06-26 23:32 ` Clem Cole
2023-06-27 4:43 ` Steve Jenkin
2023-06-26 23:44 ` Bakul Shah
2023-06-27 3:47 ` Steve Jenkin
2023-06-27 15:50 ` Steffen Nurpmeso
2023-06-27 16:07 ` Steffen Nurpmeso
2023-06-27 0:25 ` segaloco via COFF
2023-06-27 6:23 ` Ralph Corderoy
2023-06-27 6:28 ` Adam Thornton
2023-06-27 6:33 ` Ralph Corderoy
2023-06-27 7:53 ` steve jenkin
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