Re: [Cocci] [PATCH v2] scripts: coccicheck: Correct usage of make coccicheck

[Sumera Priyadarsini <sylphrenadin@gmail.com>]

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On Tue, Nov 24, 2020 at 2:36 AM Julia Lawall <julia.lawall@inria.fr> wrote:

>
>
> On Wed, 18 Nov 2020, Sumera Priyadarsini wrote:
>
> > The command "make coccicheck C=1 CHECK=scripts/coccicheck" results in the
> > error:
> >         ./scripts/coccicheck: line 65: -1: shift count out of range
> >
> > This happens because every time the C variable is specified,
> > the shell arguments need to be "shifted" in order to take only
> > the last argument, which is the C file to test. These shell arguments
> > mostly comprise flags that have been set in the Makefile. However,
> > when coccicheck is specified in the make command as a rule, the
> > number of shell arguments is zero, thus passing the invalid value -1
> > to the shift command, resulting in an error.
> >
> > Modify coccicheck to print correct usage of make coccicheck so as to
> > avoid the error.
> >
> > Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
> > ---
> > Changes in v2:
> > - Move test to only display error message
> > ---
> >  scripts/coccicheck | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)
> >
> > diff --git a/scripts/coccicheck b/scripts/coccicheck
> > index 209bb0427b43..f3b8bf505c5f 100755
> > --- a/scripts/coccicheck
> > +++ b/scripts/coccicheck
> > @@ -61,6 +61,18 @@ COCCIINCLUDE=${COCCIINCLUDE// -include/ --include}
> >  if [ "$C" = "1" -o "$C" = "2" ]; then
> >      ONLINE=1
> >
> > +    if [[ $# -le 0 ]]; then
> > +         echo ''
> > +         echo 'Specifying both the variable "C" and rule "coccicheck"
> in the make
> > +command results in a shift count error.'
> > +         echo ''
> > +         echo 'Try specifying "scripts/coccicheck" as a value for the
> CHECK variable instead.'
> > +         echo ''
> > +         echo 'Example:      make C=2 CHECK=scripts/coccicheck
> drivers/staging/wfx/hi_t.o'
>
> I think that this file doesn't exist any more.  Even though you can't
> guarantee that any particular file will be around forever, a file in
> staging is probably not a good choice, since they are usually on their way
> in or on the way out of the kernel.
>

Fair, I will send a v3 with a better example.

regards,
sumera


> julia
>
> > +         echo ''
> > +         exit 1
> > +    fi
> > +
> >      # Take only the last argument, which is the C file to test
> >      shift $(( $# - 1 ))
> >      OPTIONS="$COCCIINCLUDE $1"
> > --
> > 2.25.1
> >
> > _______________________________________________
> > Cocci mailing list
> > Cocci@systeme.lip6.fr
> > https://systeme.lip6.fr/mailman/listinfo/cocci
> >
>

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