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To: cygwin AT cygwin DOT com
From: Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Subject: Re: Bash unable to print epoch timestamp
Date: Thu, 22 Oct 2015 00:05:53 +0000 (UTC)
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Don Harrop <don <at> effx.us> writes:
> Bash outputs no value when using it's built in method of printing an 
> "epoch" timestamp.
> BashCommandLine#: printf '%(%s)T' -1

bash printf depends on underlying strftime in newlib, which does not support
%s, as it is conditional on _WANT_C99_TIME_FORMATS being defined, and that
is presumably not defined in the config, as %s is not shown in man strftime. 
Workaround for now is use 
    date +%s 
for current time, and 
   date -d $(printf '%(%T)T' -2) +%s
for shell invocation time.




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