Yeeh, that's funny indeed :)
Now this:
time ( test2Y=$(stat -c %Y test2); for (( i=0; i<1024; i++ )); do if (( $(stat
-c %Y test1) < ${test2Y} )); then echo >> /dev/null; else echo >> /dev/null; fi;
done; );
real 0m4.503s
user 0m1.048s
sys 0m3.240s
time ( for (( i=0; i<1024; i++ )); do if [[ -N test1 ]]; then echo >>
/dev/null; else echo >> /dev/null; fi; done; );
real 0m0.034s
user 0m0.023s
sys 0m0.009s
On Fri, 2021-11-12 at 12:16 -0500, Lawrence Velázquez wrote:
> On Fri, Nov 12, 2021, at 4:36 AM, Mischa Baars wrote:
> > Using Fedora 32 (bash 5.0.17) this returns a true, while on Fedora 35 (bash
> > 5.1.8) this returns a false:
> > touch test; if [[ -N test ]]; then echo true; else echo false; fi;
> >
> > [...]
> >
> > As I understand it, -N stands for NEW and therefore should return a true
> > when either a 'touch -a test' or a 'touch -am test' is given.
>
> FWIW, there's some disagreement on this.
>
> % cat foo_test
> test -N foo
> echo "$?"
> % touch foo
> % /bin/bash -c 'echo "$BASH_VERSION"; . ./foo_test'
> 3.2.57(1)-release
> 0
> % /opt/local/bin/bash -c 'echo "$BASH_VERSION"; . ./foo_test'
> 5.1.8(1)-release
> 1
> % ksh -c 'echo "${.sh.version}"; . ./foo_test'
> Version AJM 93u+ 2012-08-01
> 1
> % yash -c 'echo "$YASH_VERSION"; . ./foo_test'
> 2.51
> 1
> % zsh -c 'echo "$ZSH_VERSION"; . ./foo_test'
> 5.8
> 0
>
