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Date: Thu, 22 Oct 2015 10:46:26 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Bash unable to print epoch timestamp
Message-ID: <20151022084626.GX5319@calimero.vinschen.de>
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References: <loom DOT 20151022T010214-951 AT post DOT gmane DOT org> <loom DOT 20151022T084651-899 AT post DOT gmane DOT org>
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Hi Brian,

On Oct 22 07:03, Brian Inglis wrote:
> Brian Inglis <Brian.Inglis <at> SystematicSw.ab.ca> writes:
>=20
> >=20
> > Don Harrop <don <at> effx.us> writes:
> > > Bash outputs no value when using it's built in method of printing an=
=20
> > > "epoch" timestamp.
> > > BashCommandLine#: printf '%(%s)T' -1
> >=20
> > bash printf depends on underlying strftime in newlib, which does not su=
pport
> > %s, as it is conditional on _WANT_C99_TIME_FORMATS being defined, and t=
hat
> > is presumably not defined in the config, as %s is not shown in man strf=
time.=20
> > Workaround for now is use=20
> >     date +%s=20
> > for current time, and=20
> >    date -d $(printf '%(%T)T' -2) +%s
> > for shell invocation time.
>=20
> > %s, as it is conditional on _WANT_C99_TIME_FORMATS being defined, and t=
hat
> Wrong! Misread the code, strftime %s is not supported!=20
>=20
> STC and suggested patch appended (posting from gmane), compiles, but can't
> build STC as ld fails with undef refs, and I don't know all the correct
> LD..., -L and -l incantations. Email me for original files.=20

Cool, thanks for the patch.  Unfortunately it doesn't apply cleanly.
There are several unexpected line wraps and there's this:

> --- a/newlib/time/strftime.c        2015-08-20 03:39:24.000000000 -0600
> +++ b/newlib/time/strftime.c        2015-10-21 20:15:22.367453000 -0600

How did this happen?  If you checkout the newlib-cygwin git repo,
strftime.c is under newlib/libc/time, not under newlib/time :o

Would you mind to attach a patch generated with git format-patch?


Thanks in advance,
Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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