security: use a single function to set DAC user and group

Merge the functions 'virSecurityDACSetUser' and
'virSecurityDACSetGroup' into 'virSecurityDACSetUserAndGroup'.
Signed-off-by: NGiuseppe Scrivano <gscrivan@redhat.com>

src/security/security_dac.c

@@ -47,22 +47,25 @@ struct _virSecurityDACData {
     gid_t *groups;
     int ngroups;
     bool dynamicOwnership;
+    char *baselabel;
 };
 
-void
-virSecurityDACSetUser(virSecurityManagerPtr mgr,
-                      uid_t user)
-{
-    virSecurityDACDataPtr priv = virSecurityManagerGetPrivateData(mgr);
-    priv->user = user;
-}
-
-void
-virSecurityDACSetGroup(virSecurityManagerPtr mgr,
+/* returns -1 on error, 0 on success */
+int
+virSecurityDACSetUserAndGroup(virSecurityManagerPtr mgr,
+                              uid_t user,
                               gid_t group)
 {
     virSecurityDACDataPtr priv = virSecurityManagerGetPrivateData(mgr);
+    priv->user = user;
     priv->group = group;
+
+    if (virAsprintf(&priv->baselabel, "%u:%u",
+                    (unsigned int) user,
+                    (unsigned int) group) < 0)
+        return -1;
+
+    return 0;
 }
 
 void
@@ -217,6 +220,7 @@ virSecurityDACClose(virSecurityManagerPtr mgr)
 {
     virSecurityDACDataPtr priv = virSecurityManagerGetPrivateData(mgr);
     VIR_FREE(priv->groups);
+    VIR_FREE(priv->baselabel);
     return 0;
 }
 

src/security/security_dac.h

@@ -25,9 +25,8 @@
 
 extern virSecurityDriver virSecurityDriverDAC;
 
-void virSecurityDACSetUser(virSecurityManagerPtr mgr,
-                           uid_t user);
-void virSecurityDACSetGroup(virSecurityManagerPtr mgr,
+int virSecurityDACSetUserAndGroup(virSecurityManagerPtr mgr,
+                                  uid_t user,
                                   gid_t group);
 
 void virSecurityDACSetDynamicOwnership(virSecurityManagerPtr mgr,

src/security/security_manager.c

@@ -146,8 +146,10 @@ virSecurityManagerPtr virSecurityManagerNewDAC(const char *virtDriver,
     if (!mgr)
         return NULL;
 
-    virSecurityDACSetUser(mgr, user);
-    virSecurityDACSetGroup(mgr, group);
+    if (virSecurityDACSetUserAndGroup(mgr, user, group) < 0) {
+        virSecurityManagerDispose(mgr);
+        return NULL;
+    }
     virSecurityDACSetDynamicOwnership(mgr, dynamicOwnership);
 
     return mgr;