Re: [f2fs-dev] [PATCH 1/1] f2fs-toos:fsck.f2fs Fix bad return value

[Jaegeuk Kim]

On 11/02, Eric Biggers wrote:
> On Mon, Oct 26, 2020 at 05:40:00PM +0800, Robin Hsu via Linux-f2fs-devel wrote:
> > 'ret' should not have been used here: otherwise, it would be wrongly used
> > as the error code and then be returned from main().
> > 
> > Signed-off-by: Robin Hsu <robinhsu@xxxxxxxxxx>
> > ---
> >  fsck/fsck.c | 3 +--
> >  1 file changed, 1 insertion(+), 2 deletions(-)
> > 
> > diff --git a/fsck/fsck.c b/fsck/fsck.c
> > index f97e9fb..66e4e3f 100644
> > --- a/fsck/fsck.c
> > +++ b/fsck/fsck.c
> > @@ -3137,8 +3137,7 @@ int fsck_verify(struct f2fs_sb_info *sbi)
> >  		char ans[255] = {0};
> >  
> >  		printf("\nDo you want to restore lost files into ./lost_found/? [Y/N] ");
> > -		ret = scanf("%s", ans);
> > -		ASSERT(ret >= 0);
> > +		ASSERT(scanf("%s", ans) >= 0);
> >  		if (!strcasecmp(ans, "y")) {
> >  			for (i = 0; i < fsck->nr_nat_entries; i++) {
> >  				if (f2fs_test_bit(i, fsck->nat_area_bitmap))
> 
> This patch causes a compiler warning:
> 
> 	In file included from f2fs.h:33,
> 			 from fsck.h:14,
> 			 from fsck.c:11:
> 	fsck.c: In function 'fsck_verify':
> 	../include/f2fs_fs.h:197:11: warning: format '%s' expects a matching 'char *' argument [-Wformat=]
> 	    printf("[ASSERT] (%s:%4d) " #exp"\n",  \
> 		   ^~~~~~~~~~~~~~~~~~~~
> 	fsck.c:3151:3: note: in expansion of macro 'ASSERT'
> 	   ASSERT(scanf("%s", ans) >= 0);
> 	   ^~~~~~

Urg. Fixed by this.