[libvirt] [PATCH v1 03/23] virSecurityDACSetOwnershipInternal: Don't chown so often

[Michal Privoznik]

It's better if we stat() file that we are about to chown() at
first and check if there's something we need to change. Not that
it would make much difference, but for the upcoming patches we
need to be doing stat() anyway.

Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---
 src/security/security_dac.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/src/security/security_dac.c b/src/security/security_dac.c
index 0dfe570..9b079e0 100644
--- a/src/security/security_dac.c
+++ b/src/security/security_dac.c
@@ -271,17 +271,18 @@ virSecurityDACSetOwnershipInternal(virSecurityDACDataPtr priv,
             path = src->path;
         }
 
+        if (stat(path, &sb) < 0) {
+            virReportSystemError(errno, _("unable to stat: %s"), path);
+            return -1;
+        }
+
+        if (sb.st_uid == uid && sb.st_gid == gid) {
+            /* nothing to chown */
+            return 0;
+        }
+
         rc = chown(path, uid, gid);
         chown_errno = errno;
-
-        if (rc < 0 &&
-            stat(path, &sb) >= 0) {
-            if (sb.st_uid == uid &&
-                sb.st_gid == gid) {
-                /* It's alright, there's nothing to change anyway. */
-                return 0;
-            }
-        }
     }
 
     if (rc < 0) {
-- 
2.4.9