Re: find -execdir executes in wrong dir

[Dirk Fassbender <dirk dot fassbender at arcor dot de>]

Am 22.11.2010 12:19, schrieb Corinna Vinschen:
> On Nov 21 05:02, pdanford wrote:
> > I just upgraded to version 1.7.7-1 and the following find command is
> > broken (which used to work correctly in a recent 1.7x version):
> >
> > C:\cygwin\bin\find . -name file.txt -type f -execdir pwd ';'
> >
> > Apparently, if there are say 10 matching file.txt files, -execdir
> > executes the command in the first dir over and over. However, the
> > following use of find works correctly:
> >
> > C:\cygwin\bin\find . -name file.txt -type f -execdir pwd '{}' +
> It appears that this is a problem in find 3.5.9.
>
> I can reproduce this problem, even under Cygwin 1.7.5, and I examined
> the strace output.  What happens is that find forks for each call to
> pwd.  The forked find then calls fchdir before calling exec("pwd").
>
> And here's the problem.  Each single fchdir is called with the exact
> same directory descriptor.  There is an open file descriptor (fd 7)
> which holds a handle to the *correct* directory, but the forked find
> calls fchdir(4), which is a file descriptor holding the first directory
> containing the file.
>
> This does not occur when using find 3.5.8.
>
> Eric?  Would you mind to have a look?
>
>
> Thanks,
> Corinna

The behaviour of find -execdir is documented in the info pages.
From the info page:

 -- Action: -execdir command ;
     Execute COMMAND; true if zero status is returned.  `find' takes
     all arguments after `-execdir' to be part of the command until an
     argument consisting of `;' is reached.  It replaces the string
     `{}' by the current file name being processed everywhere it occurs
     in the command.  Both of these constructions need to be escaped
     (with a `\') or quoted to protect them from expansion by the
     shell.  The command is executed in the directory in which `find'
     was run.

So
    C:\cygwin\bin\find . -name file.txt -type f -execdir pwd ';'
execute the "pwd" in the current directory and do not change directories.

Regards
Dirk



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