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[Bug-gnulib] Re: tracing from aclocal
From: |
Paul Eggert |
Subject: |
[Bug-gnulib] Re: tracing from aclocal |
Date: |
18 Aug 2003 14:04:24 -0700 |
User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 |
Akim Demaille <address@hidden> writes:
> Is this really all that can do a modern system? A one second accuracy
> on time stamps?
Things are improving a bit in this area, though not as much as I'd like.
Sun patch 109933-02 for Solaris 8 sparc, released August 1, added
support to "cp -p" to set file timestamps to microsecond resolution.
A similar patch
<http://mail.gnu.org/archive/html/bug-coreutils/2003-08/msg00016.html>
has been accepted to coreutils but it's only in CVS now.
(This patch has uncovered some glibc bugs in this area: the current
glibc CVS sometimes gratuitously adds a half-second to file
timestamps, which can move them into the future! See
<http://sources.redhat.com/ml/libc-alpha/2003-08/msg00062.html>.)
However, this only narrows the window down to 1 microsecond; it
doesn't entirely close it. So we'd still need a 'sleep 0.000001'; but
unfortunately that syntax is only supported in recent coreutils
'sleep' implementations. And anyway, the vast majority of systems
don't have these recent improvements, deficient as they are.
I'd really prefer being able to copy file timestamps to their full
(currently: nanosecond) resolution, but I don't know of any system
that can do that yet.
The bottom line is that I suspect we'll be stuck with that 'sleep 1'
for another decade at least.
- [Bug-gnulib] proposed gettext.m4 patch for inttypes.h (merge from coreutils), Paul Eggert, 2003/08/11
- Re: [Bug-gnulib] proposed gettext.m4 patch for inttypes.h (merge from coreutils), Bruno Haible, 2003/08/12
- Re: [Bug-gnulib] proposed gettext.m4 patch for inttypes.h (merge from coreutils), Paul Eggert, 2003/08/12
- Re: [Bug-gnulib] proposed gettext.m4 patch for inttypes.h (merge from coreutils), Bruno Haible, 2003/08/12
- tracing from aclocal (Was: Re: [Bug-gnulib] proposed gettext.m4 patch for inttypes.h (merge from coreutils)), Alexandre Duret-Lutz, 2003/08/12
- [Bug-gnulib] Re: tracing from aclocal, Akim Demaille, 2003/08/14
- [Bug-gnulib] Re: tracing from aclocal, Alexandre Duret-Lutz, 2003/08/15
- [Bug-gnulib] Re: tracing from aclocal, Akim Demaille, 2003/08/18
- [Bug-gnulib] Re: tracing from aclocal,
Paul Eggert <=
- [Bug-gnulib] Re: tracing from aclocal, Akim Demaille, 2003/08/19
- [Bug-gnulib] Re: tracing from aclocal, Alexandre Duret-Lutz, 2003/08/18
- [Bug-gnulib] Re: tracing from aclocal, Akim Demaille, 2003/08/19
- [Bug-gnulib] Re: tracing from aclocal, Alexandre Duret-Lutz, 2003/08/18
- [Bug-gnulib] Re: tracing from aclocal, Akim Demaille, 2003/08/19
- Re: [Bug-gnulib] proposed gettext.m4 patch for inttypes.h (merge from coreutils), Paul Eggert, 2003/08/12
- Re: [Bug-gnulib] proposed gettext.m4 patch for inttypes.h (merge from coreutils), Jim Meyering, 2003/08/13