[Bugs] [Bug 1193929] GlusterFS can be improved

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1193929



--- Comment #311 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: https://review.gluster.org/20925 committed in master by "Amar Tumballi"
<amarts at redhat.com> with a commit message- changelog xlator:
strncpy()->sprintf(), reduce strlen()'s

xlators/features/changelog/lib/src/gf-changelog-journal-handler.c
xlators/features/changelog/lib/src/gf-changelog.c
xlators/features/changelog/src/changelog-helpers.c
xlators/features/changelog/src/changelog-misc.h

strncpy may not be very efficient for short strings copied into
a large buffer: If the length of src is less than n,
strncpy() writes additional null bytes to dest to ensure
that a total of n bytes are written.

Instead, use snprintf(). Where possible, ensure there's
no truncation of the output.

Also:
- save the result of strlen() and re-use it when possible.
- move from strlen to SLEN (sizeof() ) for const strings.
- switch a strncpy to a memcpy.

Compile-tested only!

Change-Id: Ia7a52bce0b243613ad910192ec163c93d944e077
updates: bz#1193929
Signed-off-by: Yaniv Kaul <ykaul at redhat.com>

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