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Re: Inaccurate modification date testing


From: Chet Ramey
Subject: Re: Inaccurate modification date testing
Date: Wed, 14 Aug 2013 20:41:35 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:17.0) Gecko/20130328 Thunderbird/17.0.5

On 8/14/13 4:41 PM, Jacek Krüger wrote:
> According to the manual of bash
> file1 -nt file2
> True if file1 is newer (according to modification date) than file2, or if
> file1 exists and file2 does not
> 
> Bash is innacurate when testing modification dates. It ignores fractions of
> a second. Is it expected? Coreutils test does it properly.

Bash-4.3 will use struct timespec and nanosecond granularity if it's
available and in struct stat.  Bash-4.2 used the traditional time_t
members.

Chet

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/



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