dir.c: get attributes by fd

* dir.c (is_case_sensitive): get attributes by the file descriptor
  of open directory, instead of using mount point name.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51208 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 3 deletions

diff --git a/dir.c b/dir.c
index 9b62cb3e07..b75e6d63c5 100644
--- a/dir.c
+++ b/dir.c
@@ -1451,10 +1451,8 @@ is_case_sensitive(DIR *dirp)
     const vol_capabilities_attr_t *const cap = attrbuf[0].cap;
     const int idx = VOL_CAPABILITIES_FORMAT;
     const uint32_t mask = VOL_CAP_FMT_CASE_SENSITIVE;
-    struct statfs sf;
 
-    if (fstatfs(dirfd(dirp), &sf)) return -1;
-    if (getattrlist(sf.f_mntonname, &al, attrbuf, sizeof(attrbuf), FSOPT_NOFOLLOW))
+    if (fgetattrlist(dirfd(dirp), &al, attrbuf, sizeof(attrbuf), FSOPT_NOFOLLOW))
 	return -1;
     if (!(cap->valid[idx] & mask))
 	return -1;