From 561746080b0b7154bfb3bdee20d426cf2ef7db17 Mon Sep 17 00:00:00 2001 From: "Kaleb S. KEITHLEY" Date: Thu, 7 Jul 2016 08:51:08 -0400 Subject: core: use readdir(3) with glibc, and associated cleanup Starting with glibc-2.23 (i.e. what's in Fedora 25), readdir_r(3) is marked as deprecated. Specifically the function decl in has the deprecated attribute, and now warnings are thrown during the compile on Fedora 25 builds. The readdir(_r)(3) man page (on Fedora 25 at least) and World+Dog say that glibc's readdir(3) is, and always has been, MT-SAFE as long as only one thread is accessing the directory object returned by opendir(). World+Dog also says there is a potential buffer overflow in readdir_r(). World+Dog suggests that it is preferable to simply use readdir(). There's an implication that eventually readdir_r(3) will be removed from glibc. POSIX has, apparently deprecated it in the standard, or even removed it entirely. Over and above that, our source near the various uses of readdir(_r)(3) has a few unsafe uses of strcpy()+strcat(). (AFAIK nobody has looked at the readdir(3) implemenation in *BSD to see if the same is true on those platforms, and we can't be sure of MacOS even though we know it's based on *BSD.) Change-Id: I5481f18ba1eebe7ee177895eecc9a80a71b60568 BUG: 1356998 Signed-off-by: Kaleb S. KEITHLEY Reviewed-on: http://review.gluster.org/14838 Smoke: Gluster Build System Reviewed-by: Niels de Vos CentOS-regression: Gluster Build System NetBSD-regression: NetBSD Build System Reviewed-by: Kotresh HR Reviewed-by: Jeff Darcy --- libglusterfs/src/inode.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'libglusterfs/src/inode.c') diff --git a/libglusterfs/src/inode.c b/libglusterfs/src/inode.c index 6d79ac2d3f9..6e1234e9ce2 100644 --- a/libglusterfs/src/inode.c +++ b/libglusterfs/src/inode.c @@ -852,10 +852,7 @@ inode_grep_for_gfid (inode_table_t *table, inode_t *parent, const char *name, gf_boolean_t __is_root_gfid (uuid_t gfid) { - uuid_t root; - - memset (root, 0, 16); - root[15] = 1; + static uuid_t root = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}; if (gf_uuid_compare (gfid, root) == 0) return _gf_true; -- cgit