First three fixes on lines 133, 151, and 280 are cosmetic. Because there
was unobvious null check compiler thought variable might be null, and warned
when after pointer adjustment it was followed without null check. Perhaps
this will not happen sometime in future when compiler is made more smart,
meanwhile lets give better hints to avoid false positive.
The last change addresses issue that is possible, at least in theory.
text-utils/hexdump-parse.c:465:12: warning: potential null pointer
dereference [-Wnull-dereference]
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
(Original patch and commit message edited by Rudi.)
gcc-7 adds -Wimplicit-fallthrough=3 to our default flag -Wextra.
This warning can be silenced by using comment /* fallthrough */
which is also recognized by other tools like coverity. There are
also other valid comments (see man gcc-7) but we consolidate this
style now.
We could have also used __attribute__((fallthrough)) but the comment
looks nice and does not need to be ifdef'ed for compatibility.
Reference: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=7652
Reference: https://developers.redhat.com/blog/2017/03/10/wimplicit-fallthrough-in-gcc-7/
Reviewed-by: Ruediger Meier <ruediger.meier@ga-group.nl>
Suggested-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
The printf(3) man page says about 'q':
("quad". 4.4BSD and Linux libc5 only. Don't use.) This is a synonym for ll.
This fixes hexdump with musl libc.
Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
[kzak@redhat.com: - fix coding style,
- use xalloc in all code,
- fix strtol usage]
Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
Karel Zak
Sami Kerola
Natanael Copa
HUANG Wei
Ondrej Oprala