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Re: Undocumented usage of printf?
From: |
Eric Blake |
Subject: |
Re: Undocumented usage of printf? |
Date: |
Thu, 15 Apr 2010 09:43:03 -0600 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100330 Fedora/3.0.4-1.fc12 Lightning/1.0b1 Thunderbird/3.0.4 |
On 04/15/2010 08:21 AM, Clark J. Wang wrote:
> I saw a printf usage from a Linux forum's post:
>
> # printf "%d\n" "'a"
> 97
> #
POSIX requires this behavior, so you could claim that this serves as
documentation:
http://www.opengroup.org/onlinepubs/9699919799/utilities/printf.html
"If the leading character is a single-quote or double-quote, the value
shall be the numeric value in the underlying codeset of the character
following the single-quote or double-quote."
--
Eric Blake eblake@redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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