Re: Passing directories and files

[goncholden]

Was it designed to function with filenames then?




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------- Original Message -------
On Thursday, May 26th, 2022 at 5:35 AM, Bernhard Voelker 
<mail@bernhard-voelker.de> wrote:


> On 5/25/22 14:08, goncholden via Bug reports for the GNU find utilities wrote:
>
> > I am using the FIND command on a number of directories stored in FDIR array 
> > to execute HEAD on each file. How can I adapt the code so users can also 
> > include files as well as directories?
>
>
> well, I don't think there's anything to adjust, because `find` already
> accepts both files and directories as starting points.
>
> > hn=8
> > nf=${#fdir[@]}
> > for (( i=0 ; i < $nf ; i++ )); do
> > find "${fdir[$i]}" -type f \
> > -exec head -v -n "$hn" '{}' +
> > done
> > The synopsis of the GNU find command is
> >
> > find [-H] [-L] [-P] [-D debugopts] [-Olevel] [starting-point...] 
> > [expression]
> >
> > where [starting-point...] is zero or more paths. There is nothing stopping 
> > the user from passing files as starting points
>
>
> no problem, find will just work well both with regular files or directories.
> For the latter, it will descend the directory hierarchy, obviously.
>
> > Example, given:
> >
> > $ cat subdir/somefile
> > foo
> > bar
> > baz
> >
> > then
>
>
> the following came out a bit mangled via email.
>
> > $ find subdir/somefile -
> >
> > type
> >
> > f -
> >
> > exec
> >
> > head -n 2 {} +
> > foo
> > bar
> >
> > I could just do
> >
> > find
> >
> > "
> >
> > ${fdir[@]}
> >
> > "
> >
> > -
> >
> > type
> >
> > f -
> >
> > exec
> >
> > head -v -n
> >
> > "
> >
> > $hn
> >
> > "
> >
> > '{}'
> >
> > +
> >
> > regardless of the mix of directories and files in FDIR.
> >
> > But is this the right and proper way to use the FIND command?
>
>
> Sure, why not? ;-)
>
> $ find subdir/somefile -type f -exec head -v -n1 '{}' +
> ==> subdir/somefile <==
>
> foo
>
> $ find subdir -type f -exec head -v -n2 '{}' +
> ==> subdir/somefile <==
>
> foo
>
> Have a nice day,
> Berny