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Re: What is the difference between --binary and the default of md5sum?
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From: |
Eric Blake |
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Subject: |
Re: What is the difference between --binary and the default of md5sum? |
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Date: |
Mon, 09 Jul 2012 04:30:23 -0600 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 |
On 07/06/2012 09:18 AM, Peng Yu wrote:
> Hi,
>
> I don't see any difference between the two md5sum commands (on Mac OS).
>
> ~/linux/test/gnu/gnu/coreutils/md5sum/--binary$ ./main.sh
> md5sum `which md5sum`
> which md5sum
> 02389bdcb510f7a2667f94c4264bebd8 /opt/local/libexec/gnubin/md5sum
> md5sum -b `which md5sum`
> which md5sum
> 02389bdcb510f7a2667f94c4264bebd8 */opt/local/libexec/gnubin/md5sum
>
> ~/linux/test/gnu/gnu/coreutils/md5sum/--binary$ cat main.sh
> #!/usr/bin/env bash
>
> set -v
> md5sum `which md5sum`
> md5sum -b `which md5sum`
>
> As mentioned at http://cygwin.com/cygwin-ug-net/using-textbinary.html,
> the difference between --binary and default is only important on
> windows, right?
It only matters on non-posix systems where fopen(name,"rb") behaves
differently from fopen(name,"r"). Windows is the most popular of these
systems; and you are correct that Mac OS is not impacted.
--
Eric Blake address@hidden +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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