Re: Empty file without "x" permission is successfully executable on Cygwin

[Thomas Wolff <towo at towo dot net>]

Am 05.08.2019 um 22:01 schrieb Ken Brown:
> On 8/5/2019 2:18 PM, Lavrentiev, Anton (NIH/NLM/NCBI) [C] via cygwin wrote:
> > Hi,
> >
> > Please consider the following shell session:
> >
> > $ cat dummy.c
> > #include <stdio.h>
> >
> > int main()
> > {
> >       return 0;
> > }
> > $ gcc -o dummy dummy.c
> > $ mv dummy.exe dummy
> > $ ./dummy
> > $ echo $?
> > 0
> > $ chmod a-x dummy
> > $ ./dummy
> > -bash: ./dummy: Permission denied
> > $ rm dummy
> > $ touch dummy
> > $ ./dummy
> > $ echo $?
> > 0
> >
> > So Cygwin lets the shell to execute a zero-sized file regardless of the "x" perm
> > (non-empty files are not executable if they do not have "x", as shown above).
> I can't reproduce this on my system.  Can you show the permissions and ACL of dummy?
>
> > There's more.  If I put some rubbish in a file, Cygwin still tries to execute it even if the "x" is not there:
> >
> > $ rm dummy
> > $ echo "1" > dummy
> > $ ./dummy
> > ./dummy: line 1: 1: command not found
> Again I can't reproduce this.
I reproduce the behaviour:
> echo echo foo > bar
> ls -l bar
-rw-r--r-- 1 towo None 9  5. Aug 22:18 bar
> ./bar
foo
>


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