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Re: unexpected behavior of cp and mv

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Hi,

Alberto Sentieri wrote:
> I tried setfattr as you suggested with "user" and without "user". Both
> failed with "Operation not supported" and none of them changed the
> timestamp.

This only leaves the idea to mimick the strace of cp -p in an own
C program to see whether utimensat() has the desired effect and
whether following calls spoil it.
Maybe it is necessary to really create a new file and to write
some realistic amount of data to it in order to set up the conditions
for the problem.

The code of cp.c and copy.c in
  https://sources.debian.org/src/coreutils/8.30-3/src/
looks not overly self-contained. So it might be difficult to get a
debuggable version of cp, if not Debian package development magic can
produce it.


Have a nice day :)

Thomas

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Thread

unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 19:10 +0200
  Re: unexpected behavior of cp and mv Roberto C. Sánchez <roberto@debian.org> - 2020-04-29 19:20 +0200
    Re: Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 20:50 +0200
    Re: Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 21:20 +0200
      Re: unexpected behavior of cp and mv David Wright <deblis@lionunicorn.co.uk> - 2020-04-30 03:50 +0200
        Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 06:20 +0200
  Re: unexpected behavior of cp and mv Charles Curley <charlescurley@charlescurley.com> - 2020-04-29 21:20 +0200
    Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 22:10 +0200
      Re: unexpected behavior of cp and mv "Thomas Schmitt" <scdbackup@gmx.net> - 2020-04-29 22:20 +0200
        Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 22:30 +0200
        Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-29 23:00 +0200
          Re: unexpected behavior of cp and mv "Thomas Schmitt" <scdbackup@gmx.net> - 2020-04-29 23:30 +0200
            Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 06:40 +0200
              Re: unexpected behavior of cp and mv "Thomas Schmitt" <scdbackup@gmx.net> - 2020-04-30 12:40 +0200
                Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 16:20 +0200
            Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 18:50 +0200
              Re: unexpected behavior of cp and mv "Thomas Schmitt" <scdbackup@gmx.net> - 2020-04-30 19:40 +0200
                Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 20:10 +0200
                Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 21:50 +0200
                Re: unexpected behavior of cp and mv The Wanderer <wanderer@fastmail.fm> - 2020-04-30 22:00 +0200
                Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 22:10 +0200
                Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 23:40 +0200
              Re: unexpected behavior of cp and mv David Wright <deblis@lionunicorn.co.uk> - 2020-04-30 20:00 +0200
          Re: unexpected behavior of cp and mv songbird <songbird@anthive.com> - 2020-04-30 00:00 +0200
            Re: unexpected behavior of cp and mv Alberto Sentieri <22t@tripolho.com> - 2020-04-30 06:10 +0200

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