On Tue, Apr 08, 2025 at 10:27:48PM +0800, Zorro Lang wrote:
> On Tue, Apr 08, 2025 at 12:43:32AM +0530, Nirjhar Roy (IBM) wrote:
> >
> > On 4/8/25 00:16, Ritesh Harjani (IBM) wrote:
> > > Zorro Lang <zlang@xxxxxxxxxx> writes:
> > >
> > > > On Fri, Apr 04, 2025 at 10:34:47AM +0530, Ritesh Harjani wrote:
> > > > > "Nirjhar Roy (IBM)" <nirjhar.roy.lists@xxxxxxxxx> writes:
> > > > >
> > > > > > Replace exit <return-val> with _exit <return-val> which
> > > > > > is introduced in the previous patch.
> > > > > >
> > > > > > Signed-off-by: Nirjhar Roy (IBM) <nirjhar.roy.lists@xxxxxxxxx>
> > > <...>
> > > > > > ---
> > > > > > @@ -225,7 +225,7 @@ _filter_bmap()
> > > > > > die_now()
> > > > > > {
> > > > > > status=1
> > > > > > - exit
> > > > > > + _exit
> > > > > Why not remove status=1 too and just do _exit 1 here too?
> > > > > Like how we have done at other places?
> > > > Yeah, nice catch! As the defination of _exit:
> > > >
> > > > _exit()
> > > > {
> > > > status="$1"
> > > > exit "$status"
> > > > }
> > > >
> > > > The
> > > > "
> > > > status=1
> > > > exit
> > > > "
> > > > should be equal to:
> > > > "
> > > > _exit 1
> > > > "
> > > >
> > > > And "_exit" looks not make sense, due to it gives null to status.
> > > >
> > > > Same problem likes below:
> > > >
> > > >
> > > > @@ -3776,7 +3773,7 @@ _get_os_name()
> > > > echo 'linux'
> > > > else
> > > > echo Unknown operating system: `uname`
> > > > - exit
> > > > + _exit
> > > >
> > > >
> > > > The "_exit" without argument looks not make sense.
> > > >
> > > That's right. _exit called with no argument could make status as null.
> > Yes, that is correct.
> > > To prevent such misuse in future, should we add a warning/echo message
> >
> > Yeah, the other thing that we can do is 'status=${1:-0}'. In that case, for
> ^^^^^^^^^^^^^^
> That's good to me, I'm just wondering if the default value should be "1", to
> tell us "hey, there's an unknown exit status" :)
I think status=1 usually means failure...
/usr/include/stdlib.h:92:#define EXIT_FAILURE 1 /* Failing exit status. */
/usr/include/stdlib.h:93:#define EXIT_SUCCESS 0 /* Successful exit status. */
--D
> Thanks,
> Zorro
>
> > cases where the return value is a success, we simply use "_exit". Which one
> > do you think adds more value and flexibility to the usage?
> >
> > --NR
> >
> > > if the no. of arguments passed to _exit() is not 1?
> > >
> > > -ritesh
> >
> > --
> > Nirjhar Roy
> > Linux Kernel Developer
> > IBM, Bangalore
> >
>
>
