Hi,

is it possible to select all executable files from a directory tree?

I tried using find with -exec but i couldn't make it work

find -type f -exec
if test -x "{}"
then
echo "found an executable"
fi
\;

i tried making a function like this

function Qexe ()
{
if test -x "$1"
then
echo "found an executable"
fi
}

and then call it from find like this

find -type f -exec Qexe "{}" \;

but again it didn't work.


thanks in advance for your ,
-nicolas

PS: i think that my question could be generalized if it is possible to
you your own predicate in find...

man find
then go to the -perm option
there are also some examples in the examples section

> All your examples use -type f, which finds *all* the regular files, not
> just executables.
> To find executables, you can use the -perm option:
>
> find -type f -perm /u+x,g+x,o+x
>
> (or any variation therein - for example, if you want only
> owner-executables etc.)
>
> man find for the details.

thank you guys for your answers, i did read the manual... the problem is
that i would like to use my predicate-function and i can't get it to
work. Is this possible?

thanks for your time,
-nicolas

Aggelidis Nikos wrote:

> Hi,
>
> is it possible to select all executable files from a directory tree?
>
> I tried using find with -exec but i couldn't make it work

All your examples use -type f, which finds *all* the regular files, not just
executables.
To find executables, you can use the -perm option:

find -type f -perm /u+x,g+x,o+x

(or any variation therein - for example, if you want only owner-executables
etc.)

man find for the details.

Aggelidis Nikos wrote:

> thank you guys for your answers, i did read the manual... the problem is
> that i would like to use my predicate-function and i can't get it to
> work. Is this possible?

Ah, then I probably misunderstood your question in the first place.
You want to find all files, and filter out the executables using a function
or predicate of yours.

(The following is tested under bash)

Well, you can use an external script:

$ cat ckexec.sh
#!/bin/bash

if [ -x "$1" ]; then
echo "$1 is executable"
else
echo "$1 is not executable"
fi

$ ls -l
total 20
-rwxr-xr-x 1 pk users 98 2008-03-13 15:58 ckexec.sh
-rwxr-xr-x 1 pk users 8 2008-03-13 09:10 configure
-rwxr-xr-x 1 pk users 22 2008-03-13 14:14 f
-rwxr-xr-x 1 pk users 23 2008-03-13 14:14 f2
-rw-r--r-- 1 pk users 2164 2005-12-18 17:46 README

$ find -type f -exec ckexec.sh '{}' \;
../README is not executable
../configure is executable
../f is executable
../f2 is executable
../ckexec.sh is executable

Apparently, -exec does not accept a direct function name (but I stand to be
corrected):

$ function ckexec { if [ -x "$1" ]; then echo "$1 is executable"; else
echo "$1 is not executable"; fi; }
$ export -f ckexec
$ find -type f -exec ckexec '{}' \;
find: ckexec: No such file or directory
find: ckexec: No such file or directory
find: ckexec: No such file or directory
find: ckexec: No such file or directory
find: ckexec: No such file or directory

Instead, you can use almost arbitrary code by using bash -c:

$ find -type f -exec bash -c "ckexec '{}'" \;
../README is not executable
../configure is executable
../f is executable
../f2 is executable
../ckexec.sh is executable

or even

$ find -type f -exec bash -c "if [ -x '{}' ]; then echo '{}' is executable;
else echo '{}' is not executable; fi;" \;
../README is not executable
../configure is executable
../f is executable
../f2 is executable
../ckexec.sh is executable

> Instead, you can use almost arbitrary code by using bash -c:
>

thank you for your . i wasn't aware of bash -c and it really me
complete my task!

On Mar 13, 7:36 pm, Aggelidis Nikos <aggelidis.n...@gmail.com> wrote:
> Hi,
>
> is it possible to select all executable files from a directory tree?
>
> I tried using find with -exec but i couldn't make it work
>
> find -type f -exec
> if test -x "{}"
> then
> echo "found an executable"
> fi
> \;
>
> i tried making a function like this
>
> function Qexe ()
> {
> if test -x "$1"
> then
> echo "found an executable"
> fi
>
> }
>
> and then call it from find like this
>
> find -type f -exec Qexe "{}" \;
>
> but again it didn't work.
>
> thanks in advance for your ,
> -nicolas
>
> PS: i think that my question could be generalized if it is possible to
> you your own predicate in find...



find . \
-type f \
\( -perm -u+x -o -perm -g+x -o -perm -o+x \) \
-exec echo {} is executable \; \
-prune \
-o \
-type f \
-exec echo {} is not executable \;