[libvirt] [PATCH 3/4] security: avoid use of dirent d_type field

[Daniel P. Berrangé]

The d_type field cannot be assumed to be filled. Some filesystems, such
as older XFS, will simply report DT_UNKNOWN.

Even if the d_type is filled in, the use of it in the SELinux functions
is dubious. If labelling all files in a directory there's no reason to
skip things which are not regular files. We merely need to skip "." and
"..", which is done by virDirRead() already.

Signed-off-by: Daniel P. Berrangé <berrange at redhat.com>
---
 src/security/security_selinux.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/security/security_selinux.c b/src/security/security_selinux.c
index 2fceb547b4..3611bb8ebe 100644
--- a/src/security/security_selinux.c
+++ b/src/security/security_selinux.c
@@ -3282,9 +3282,6 @@ virSecuritySELinuxSetFileLabels(virSecurityManagerPtr mgr,
         return -1;
 
     while ((ret = virDirRead(dir, &ent, path)) > 0) {
-        if (ent->d_type != DT_REG)
-            continue;
-
         if (virAsprintf(&filename, "%s/%s", path, ent->d_name) < 0) {
             ret = -1;
             break;
@@ -3334,7 +3331,8 @@ virSecuritySELinuxRestoreFileLabels(virSecurityManagerPtr mgr,
         return -1;
 
     while ((ret = virDirRead(dir, &ent, path)) > 0) {
-        if (ent->d_type != DT_REG)
+        if (STREQ(ent->d_name, ".") ||
+            STREQ(ent->d_name, ".."))
             continue;
 
         if (virAsprintf(&filename, "%s/%s", path, ent->d_name) < 0) {
-- 
2.20.1