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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
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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   address@hidden    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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