[LU-9137] readdir_r is deprecated now

• Type: Improvement
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.10.0
• Assignee: James A Simmons
• Reporter: Oleg Drokin

Description

Trying to build Lustre on Fedora 25 I got hit by this:

lhsmtool_posix.c: In function Бct_import_recurseБ:
lhsmtool_posix.c:1499:3: error: Бreaddir_rБ is deprecated [-Werror=deprecated-de
clarations]
   rc = readdir_r(dir, &ent, &cookie);
   ^~
In file included from /usr/include/features.h:368:0,
                 from /usr/include/stdio.h:27,
                 from lhsmtool_posix.c:40:
/usr/include/dirent.h:189:12: note: declared here
 extern int __REDIRECT (readdir_r,
            ^
lhsmtool_posix.c: In function Бct_dir_level_maxБ:
lhsmtool_posix.c:1710:2: error: Бreaddir_rБ is deprecated [-Werror=deprecated-declarations]
  while ((rc = readdir_r(dir, &ent, &cookie)) == 0) {
  ^~~~~
In file included from /usr/include/features.h:368:0,
                 from /usr/include/stdio.h:27,
                 from lhsmtool_posix.c:40:
/usr/include/dirent.h:189:12: note: declared here
 extern int __REDIRECT (readdir_r,
            ^

man readdir_r on my Fedora25 system says that modern posix does not guarantee thread-safedness of readdir, bug glibc and other modern implementation versions of readdir are safe as long as you give it different input streams.