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Re: cmp manual page
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From: |
Eric Blake |
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Subject: |
Re: cmp manual page |
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Date: |
Wed, 15 Dec 2010 08:45:49 -0700 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101209 Fedora/3.1.7-0.35.b3pre.fc14 Lightning/1.0b3pre Mnenhy/0.8.3 Thunderbird/3.1.7 |
On 12/13/2010 06:51 PM, Marty McGowan wrote:
> @ http://unixhelp.ed.ac.uk/CGI/man-cgi?cmp
>
> <sarcarsm>
>
> " Compare two files byte by byte."
> ... and ..., like a good cow, does it turn the grass into milk!
>
> </sarcasm>
>
> is there _any_ suggestion as to what the _RETURN_ value is.
POSIX requires status 0 for identical, status 1 for different, and
status >1 for error:
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/cmp.html
Meanwhile, the POSIX folks are considering a proposal to have the next
revision of POSIX require that all man pages include a section on return
status; this would impact several GNU programs to start including this
information in a more consistent manner (at least for those GNU projects
that provide man pages to begin with, since GNU Coding Standards do not
require man pages).
--
Eric Blake address@hidden +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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