From: Sascha Hauer <s.hauer@pengutronix.de>
To: Peter Korsgaard <jacmet@sunsite.dk>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] commands/crc32: add compare 2 files crc
Date: Wed, 22 Sep 2010 18:08:34 +0200 [thread overview]
Message-ID: <20100922160834.GG23406@pengutronix.de> (raw)
In-Reply-To: <87d3s5by0y.fsf@macbook.be.48ers.dk>
On Wed, Sep 22, 2010 at 05:25:49PM +0200, Peter Korsgaard wrote:
> >>>>> "Sascha" == Sascha Hauer <s.hauer@pengutronix.de> writes:
>
> Sascha> On Wed, Sep 22, 2010 at 12:36:25PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> >> add -F options to compare to file crc
> >>
> >> it's usefull to compare what you flash in a partition
>
> Sascha> Why don't you use memcmp?
>
> Sascha> memcmp -s uImage -d /dev/nand0.kernel.bb 0 0
>
> It's sometimes interesting to be able to compare a checksum with a file
> on the host (E.G. output of cksum/md5sum/sha1sum/..)
crc32 can output the crc checksum of a file using the -f option. What
Jean-Christophe added is an option to calculate the checksum of two
files (one given with -f and the other with -F). I just fail to see why
this must be done in a single step instead of using a crc32 followed by
a memcmp.
Sascha
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next prev parent reply other threads:[~2010-09-22 16:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-22 10:36 [PATCH] commands/crc32: add compare 2 files crc Jean-Christophe PLAGNIOL-VILLARD
2010-09-22 12:36 ` Sascha Hauer
2010-09-22 13:12 ` Jean-Christophe PLAGNIOL-VILLARD
2010-09-22 15:25 ` Peter Korsgaard
2010-09-22 16:08 ` Sascha Hauer [this message]
2010-09-22 16:12 ` Jean-Christophe PLAGNIOL-VILLARD
2010-09-22 16:54 ` Sascha Hauer
2010-09-23 11:25 ` Jean-Christophe PLAGNIOL-VILLARD
2010-09-22 19:09 ` Peter Korsgaard
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