[accounts-dialog] Add a method to get a user by uid

[Matthias Clasen <matthiasc src gnome org>]

commit 556757645a475f19fb1647c07fe74890badda6b2
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jan 20 13:35:15 2010 -0500

    Add a method to get a user by uid

 src/um-user-manager.c |   15 +++++++++++++++
 src/um-user-manager.h |    2 ++
 2 files changed, 17 insertions(+), 0 deletions(-)
---
diff --git a/src/um-user-manager.c b/src/um-user-manager.c
index 4f45eff..7e54487 100644
--- a/src/um-user-manager.c
+++ b/src/um-user-manager.c
@@ -30,6 +30,7 @@
 #include <errno.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <pwd.h>
 
 #ifdef HAVE_PATHS_H
 #include <paths.h>
@@ -306,6 +307,20 @@ um_user_manager_get_user (UmUserManager *manager,
         return g_hash_table_lookup (manager->user_by_name, name);
 }
 
+UmUser *
+um_user_manager_get_user_by_id (UmUserManager *manager,
+                                uid_t          uid)
+{
+	struct  passwd *pwent;
+
+	pwent = getpwuid (uid);
+	if (!pwent) {
+		return NULL;
+	}
+
+	return um_user_manager_get_user (manager, pwent->pw_name);
+}
+
 gboolean
 um_user_manager_no_service (UmUserManager *manager)
 {
diff --git a/src/um-user-manager.h b/src/um-user-manager.h
index 0c263ef..3c117af 100644
--- a/src/um-user-manager.h
+++ b/src/um-user-manager.h
@@ -71,6 +71,8 @@ gboolean           um_user_manager_no_service            (UmUserManager *manager
 GSList *           um_user_manager_list_users            (UmUserManager *manager);
 UmUser *           um_user_manager_get_user              (UmUserManager *manager,
                                                           const char    *user_name);
+UmUser *           um_user_manager_get_user_by_id        (UmUserManager *manager,
+                                                          uid_t          uid);
 void               um_user_manager_create_user           (UmUserManager *manager,
                                                           const char    *user_name,
                                                           const char    *real_name);