diff --git a/source/dialogs/combi.c b/source/dialogs/combi.c
index f1e041c3..dd0cfb67 100644
--- a/source/dialogs/combi.c
+++ b/source/dialogs/combi.c
@@ -24,6 +24,9 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
  */
+
+#define G_LOG_DOMAIN         "Dialogs.Combi"
+
 #include <config.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -85,7 +88,7 @@ static void combi_mode_parse_switchers ( Mode *sw )
             }
             else {
                 // Report error, don't continue.
-                fprintf ( stderr, "Invalid script switcher: %s\n", token );
+                g_warning ( "Invalid script switcher: %s", token );
                 token = NULL;
             }
         }
@@ -240,7 +243,7 @@ static char * combi_get_completion ( const Mode *sw, unsigned int index )
         }
     }
     // Should never get here.
-    g_error ( "Failure, could not resolve sub-switcher." );
+    g_assert_not_reached ();
     return NULL;
 }
 
diff --git a/source/dialogs/dmenu.c b/source/dialogs/dmenu.c
index be9b4be1..255fd720 100644
--- a/source/dialogs/dmenu.c
+++ b/source/dialogs/dmenu.c
@@ -25,6 +25,8 @@
  *
  */
 
+#define G_LOG_DOMAIN    "Dialogs.DMenu"
+
 #include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -47,9 +49,6 @@
 #include "xrmoptions.h"
 #include "view.h"
 
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN    "Dialogs.DMenu"
-
 struct range_pair
 {
     unsigned int start;
@@ -444,7 +443,7 @@ static int dmenu_mode_init ( Mode *sw )
         char *estr = rofi_expand_path ( str );
         fd = open ( str, O_RDONLY );
         if ( fd < 0 ) {
-            char *msg = g_markup_printf_escaped ( "Failed to open file: <b>%s</b>:\n\t<i>%s</i>", estr, strerror ( errno ) );
+            char *msg = g_markup_printf_escaped ( "Failed to open file: <b>%s</b>:\n\t<i>%s</i>", estr, g_strerror ( errno ) );
             rofi_view_error_dialog ( msg, TRUE );
             g_free ( msg );
             g_free ( estr );
diff --git a/source/dialogs/drun.c b/source/dialogs/drun.c
index 062617c0..c16c6f2b 100644
--- a/source/dialogs/drun.c
+++ b/source/dialogs/drun.c
@@ -24,6 +24,9 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
  */
+
+#define G_LOG_DOMAIN         "Dialogs.DRun"
+
 #include <config.h>
 #ifdef ENABLE_DRUN
 #include <stdlib.h>
@@ -48,8 +51,6 @@
 #include "dialogs/drun.h"
 
 #define DRUN_CACHE_FILE    "rofi2.druncache"
-#undef  G_LOG_DOMAIN
-#define G_LOG_DOMAIN         "Dialogs.DRun"
 
 #define GET_CAT_PARSE_TIME
 
@@ -147,24 +148,24 @@ static void exec_cmd_entry ( DRunModeEntry *e )
     GError *error = NULL;
     GRegex *reg   = g_regex_new ( "%[a-zA-Z]", 0, 0, &error );
     if ( error != NULL ) {
-        fprintf ( stderr, "Internal error, failed to create regex: %s.\n", error->message );
+        g_warning ( "Internal error, failed to create regex: %s.", error->message );
         g_error_free ( error );
         return;
     }
     struct RegexEvalArg earg = { .e = e, .success = TRUE };
     char                *str = g_regex_replace_eval ( reg, e->exec, -1, 0, 0, drun_helper_eval_cb, &earg, &error );
     if ( error != NULL ) {
-        fprintf ( stderr, "Internal error, failed replace field codes: %s.\n", error->message );
+        g_warning ( "Internal error, failed replace field codes: %s.", error->message );
         g_error_free ( error );
         return;
     }
     g_regex_unref ( reg );
     if ( earg.success == FALSE ) {
-        fprintf ( stderr, "Invalid field code in Exec line: %s.\n", e->exec );;
+        g_warning ( "Invalid field code in Exec line: %s.", e->exec );;
         return;
     }
     if ( str == NULL ) {
-        fprintf ( stderr, "Nothing to execute after processing: %s.\n", e->exec );;
+        g_warning ( "Nothing to execute after processing: %s.", e->exec );;
         return;
     }
     gchar *fp        = rofi_expand_path ( g_strstrip ( str ) );
@@ -237,7 +238,7 @@ static gboolean read_desktop_file ( DRunModePrivateData *pd, const char *root, c
 
     // Name key is required.
     if ( !g_key_file_has_key ( kf, "Desktop Entry", "Name", NULL ) ) {
-        g_debug ( "Invalid DesktopFile: '%s', no 'Name' key present.\n", path );
+        g_debug ( "Invalid DesktopFile: '%s', no 'Name' key present.", path );
         g_key_file_free ( kf );
         return FALSE;
     }
@@ -258,7 +259,7 @@ static gboolean read_desktop_file ( DRunModePrivateData *pd, const char *root, c
     }
     // We need Exec, don't support DBusActivatable
     if ( !g_key_file_has_key ( kf, "Desktop Entry", "Exec", NULL ) ) {
-        g_debug ( "Unsupported DesktopFile: '%s', no 'Exec' key present.\n", path );
+        g_debug ( "Unsupported DesktopFile: '%s', no 'Exec' key present.", path );
         g_key_file_free ( kf );
         return FALSE;
     }
diff --git a/source/dialogs/run.c b/source/dialogs/run.c
index b8534095..62e55150 100644
--- a/source/dialogs/run.c
+++ b/source/dialogs/run.c
@@ -29,6 +29,10 @@
  * \ingroup RUNMode
  * @{
  */
+
+/** The log domain of this dialog. */
+#define G_LOG_DOMAIN        "Dialogs.Run"
+
 #include <config.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -56,10 +60,6 @@
  */
 #define RUN_CACHE_FILE    "rofi-3.runcache"
 
-/** The log domain of this dialog. */
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN        "Dialogs.Run"
-
 /**
  * The internal data structure holding the private data of the Run Mode.
  */
@@ -86,7 +86,7 @@ static void exec_cmd ( const char *cmd, int run_in_term )
     gsize lf_cmd_size = 0;
     gchar *lf_cmd     = g_locale_from_utf8 ( cmd, -1, NULL, &lf_cmd_size, &error );
     if ( error != NULL ) {
-        fprintf ( stderr, "Failed to convert command to locale encoding: %s\n", error->message );
+        g_warning ( "Failed to convert command to locale encoding: %s", error->message );
         g_error_free ( error );
         return;
     }
@@ -188,8 +188,8 @@ static char ** get_apps_external ( char **retv, unsigned int *length, unsigned i
                 free ( buffer );
             }
             if ( fclose ( inp ) != 0 ) {
-                fprintf ( stderr, "Failed to close stdout off executor script: '%s'\n",
-                          strerror ( errno ) );
+                g_warning ( "Failed to close stdout off executor script: '%s'",
+                          g_strerror ( errno ) );
             }
         }
     }
diff --git a/source/dialogs/script.c b/source/dialogs/script.c
index 72594a67..52cc1a03 100644
--- a/source/dialogs/script.c
+++ b/source/dialogs/script.c
@@ -25,6 +25,8 @@
  *
  */
 
+#define G_LOG_DOMAIN "Dialogs.Script"
+
 #include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -66,8 +68,8 @@ static char **get_script_output ( const char *command, unsigned int *length )
                 free ( buffer );
             }
             if ( fclose ( inp ) != 0 ) {
-                fprintf ( stderr, "Failed to close stdout off executor script: '%s'\n",
-                          strerror ( errno ) );
+                g_warning ( "Failed to close stdout off executor script: '%s'",
+                          g_strerror ( errno ) );
             }
         }
     }
@@ -201,7 +203,7 @@ Mode *script_switcher_parse_setup ( const char *str )
 
         return sw;
     }
-    fprintf ( stderr, "The script command '%s' has %u options, but needs 2: <name>:<script>.\n", str, index );
+    g_warning ( "The script command '%s' has %u options, but needs 2: <name>:<script>.", str, index );
     script_switcher_free ( sw );
     return NULL;
 }
diff --git a/source/dialogs/ssh.c b/source/dialogs/ssh.c
index 0dc2d9a7..0bc277fb 100644
--- a/source/dialogs/ssh.c
+++ b/source/dialogs/ssh.c
@@ -29,6 +29,12 @@
  * \ingroup SSHMode
  * @{
  */
+
+/**
+ * Log domain for the ssh modi.
+ */
+#define G_LOG_DOMAIN         "Dialogs.Ssh"
+
 #include <config.h>
 #include <glib.h>
 #include <stdlib.h>
@@ -50,13 +56,6 @@
 #include "history.h"
 #include "dialogs/ssh.h"
 
-/**
- * Log domain for the ssh modi.
- */
-
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN         "Dialogs.Ssh"
-
 /**
  * Name of the history file where previously choosen hosts are stored.
  */
@@ -181,7 +180,7 @@ static char **read_known_hosts_file ( char ** retv, unsigned int *length )
             free ( buffer );
         }
         if ( fclose ( fd ) != 0 ) {
-            fprintf ( stderr, "Failed to close hosts file: '%s'\n", strerror ( errno ) );
+            g_warning ( "Failed to close hosts file: '%s'", g_strerror ( errno ) );
         }
     }
 
@@ -256,7 +255,7 @@ static char **read_hosts_file ( char ** retv, unsigned int *length )
             free ( buffer );
         }
         if ( fclose ( fd ) != 0 ) {
-            fprintf ( stderr, "Failed to close hosts file: '%s'\n", strerror ( errno ) );
+            g_warning ( "Failed to close hosts file: '%s'", g_strerror ( errno ) );
         }
     }
 
@@ -357,7 +356,7 @@ static void parse_ssh_config_file ( const char *filename, char ***retv, unsigned
         }
 
         if ( fclose ( fd ) != 0 ) {
-            fprintf ( stderr, "Failed to close ssh configuration file: '%s'\n", strerror ( errno ) );
+            g_warning ( "Failed to close ssh configuration file: '%s'", g_strerror ( errno ) );
         }
     }
 }
diff --git a/source/dialogs/window.c b/source/dialogs/window.c
index 9d65aeb4..2ed4bad4 100644
--- a/source/dialogs/window.c
+++ b/source/dialogs/window.c
@@ -24,6 +24,9 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
  */
+
+#define G_LOG_DOMAIN          "Dialogs.Window"
+
 #include <config.h>
 
 #ifdef WINDOW_MODE
@@ -56,9 +59,6 @@
 #define CLIENTSTATE         10
 #define CLIENTWINDOWTYPE    10
 
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN          "Dialogs.Window"
-
 // a manageable window
 typedef struct
 {
diff --git a/source/helper.c b/source/helper.c
index 7e85dea7..8d70c422 100644
--- a/source/helper.c
+++ b/source/helper.c
@@ -25,6 +25,9 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
  */
+
+#define G_LOG_DOMAIN    "Helper"
+
 #include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -51,9 +54,6 @@
 #include "rofi.h"
 #include "view.h"
 
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN    "Helper"
-
 /**
  * Textual description of positioning rofi.
  */
@@ -383,7 +383,7 @@ char helper_parse_char ( const char *arg )
     if ( len > 2 && arg[0] == '\\' && arg[1] == 'x' ) {
         return (char) strtol ( &arg[2], NULL, 16 );
     }
-    fprintf ( stderr, "Failed to parse character string: \"%s\"\n", arg );
+    g_warning ( "Failed to parse character string: \"%s\"", arg );
     // for now default to newline.
     return '\n';
 }
@@ -491,22 +491,22 @@ int create_pid_file ( const char *pidfile )
 
     int fd = g_open ( pidfile, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR );
     if ( fd < 0 ) {
-        fprintf ( stderr, "Failed to create pid file: '%s'.\n", pidfile );
+        g_warning ( "Failed to create pid file: '%s'.", pidfile );
         return -1;
     }
     // Set it to close the File Descriptor on exit.
     int flags = fcntl ( fd, F_GETFD, NULL );
     flags = flags | FD_CLOEXEC;
     if ( fcntl ( fd, F_SETFD, flags, NULL ) < 0 ) {
-        fprintf ( stderr, "Failed to set CLOEXEC on pidfile.\n" );
+        g_warning ( "Failed to set CLOEXEC on pidfile." );
         remove_pid_file ( fd );
         return -1;
     }
     // Try to get exclusive write lock on FD
     int retv = flock ( fd, LOCK_EX | LOCK_NB );
     if ( retv != 0 ) {
-        fprintf ( stderr, "Failed to set lock on pidfile: Rofi already running?\n" );
-        fprintf ( stderr, "Got error: %d %s\n", retv, strerror ( errno ) );
+        g_warning ( "Failed to set lock on pidfile: Rofi already running?" );
+        g_warning ( "Got error: %d %s", retv, g_strerror ( errno ) );
         remove_pid_file ( fd );
         return -1;
     }
@@ -526,7 +526,7 @@ void remove_pid_file ( int fd )
 {
     if ( fd >= 0 ) {
         if ( close ( fd ) ) {
-            fprintf ( stderr, "Failed to close pidfile: '%s'\n", strerror ( errno ) );
+            g_warning ( "Failed to close pidfile: '%s'", g_strerror ( errno ) );
         }
     }
 }
diff --git a/source/history.c b/source/history.c
index 25cfcb00..f9e6422c 100644
--- a/source/history.c
+++ b/source/history.c
@@ -145,7 +145,7 @@ void history_set ( const char *filename, const char *entry )
         list = __history_get_element_list ( fd, &length );
         // Close file, if fails let user know on stderr.
         if ( fclose ( fd ) != 0 ) {
-            fprintf ( stderr, "Failed to close history file: %s\n", strerror ( errno ) );
+            g_warning ( "Failed to close history file: %s", g_strerror ( errno ) );
         }
     }
     // Look if the entry exists.
@@ -178,14 +178,14 @@ void history_set ( const char *filename, const char *entry )
 
     fd = fopen ( filename, "w" );
     if ( fd == NULL ) {
-        fprintf ( stderr, "Failed to open file: %s\n", strerror ( errno ) );
+        g_warning ( "Failed to open file: %s", g_strerror ( errno ) );
     }
     else {
         // Write list.
         __history_write_element_list ( fd, list, length );
         // Close file, if fails let user know on stderr.
         if ( fclose ( fd ) != 0 ) {
-            fprintf ( stderr, "Failed to close history file: %s\n", strerror ( errno ) );
+            g_warning ( "Failed to close history file: %s", g_strerror ( errno ) );
         }
     }
     // Free the list.
@@ -208,7 +208,7 @@ void history_remove ( const char *filename, const char *entry )
     // Open file for reading and writing.
     FILE         *fd = g_fopen ( filename, "r" );
     if ( fd == NULL ) {
-        fprintf ( stderr, "Failed to open file: %s\n", strerror ( errno ) );
+        g_warning ( "Failed to open file: %s", g_strerror ( errno ) );
         return;
     }
     // Get list.
@@ -216,7 +216,7 @@ void history_remove ( const char *filename, const char *entry )
 
     // Close file, if fails let user know on stderr.
     if ( fclose ( fd ) != 0 ) {
-        fprintf ( stderr, "Failed to close history file: %s\n", strerror ( errno ) );
+        g_warning ( "Failed to close history file: %s", g_strerror ( errno ) );
     }
     // Find entry.
     for ( unsigned int iter = 0; !found && iter < length; iter++ ) {
@@ -244,11 +244,11 @@ void history_remove ( const char *filename, const char *entry )
             __history_write_element_list ( fd, list, length );
             // Close file, if fails let user know on stderr.
             if ( fclose ( fd ) != 0 ) {
-                fprintf ( stderr, "Failed to close history file: %s\n", strerror ( errno ) );
+                g_warning ( "Failed to close history file: %s", g_strerror ( errno ) );
             }
         }
         else{
-            fprintf ( stderr, "Failed to open file: %s\n", strerror ( errno ) );
+            g_warning ( "Failed to open file: %s", g_strerror ( errno ) );
         }
     }
 
@@ -277,7 +277,7 @@ char ** history_get_list ( const char *filename, unsigned int *length )
         // File that does not exists is not an error, so ignore it.
         // Everything else? panic.
         if ( errno != ENOENT ) {
-            fprintf ( stderr, "Failed to open file: %s\n", strerror ( errno ) );
+            g_warning ( "Failed to open file: %s", g_strerror ( errno ) );
         }
         return NULL;
     }
@@ -298,7 +298,7 @@ char ** history_get_list ( const char *filename, unsigned int *length )
 
     // Close file, if fails let user know on stderr.
     if ( fclose ( fd ) != 0 ) {
-        fprintf ( stderr, "Failed to close history file: %s\n", strerror ( errno ) );
+        g_warning ( "Failed to close history file: %s", g_strerror ( errno ) );
     }
     return retv;
 }
diff --git a/source/rofi.c b/source/rofi.c
index 832ff76c..7162e973 100644
--- a/source/rofi.c
+++ b/source/rofi.c
@@ -25,6 +25,8 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
+#define G_LOG_DOMAIN    "Rofi"
+
 #include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -75,9 +77,6 @@
 // TODO: move this check to mode.c
 #include "mode-private.h"
 
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN    "Rofi"
-
 // Pidfile.
 char       *pidfile   = NULL;
 const char *cache_dir = NULL;
@@ -310,7 +309,7 @@ static void help ( G_GNUC_UNUSED int argc, char **argv )
                 break;
             }
         }
-        fprintf ( stderr, "        * %s%s%s%s\n",
+        printf ( "        * %s%s%s%s\n",
                 active?"+":"" ,
                 is_term ? (active?color_green:color_red) : "",
                   available_modi[i]->name,
@@ -367,9 +366,9 @@ static void help_print_disabled_mode ( const char *mode )
     int is_term = isatty ( fileno ( stdout ) );
     // Only  output to terminal
     if ( is_term ) {
-        fprintf ( stderr, "Mode %s%s%s is not enabled. I have enabled it for now.\n",
+        g_warning ( "Mode %s%s%s is not enabled. I have enabled it for now.",
                   color_red, mode, color_reset );
-        fprintf ( stderr, "Please consider adding %s%s%s to the list of enabled modi: %smodi: %s%s%s,%s%s.\n",
+        g_warning ( "Please consider adding %s%s%s to the list of enabled modi: %smodi: %s%s%s,%s%s.",
                   color_red, mode, color_reset,
                   color_green, config.modi, color_reset,
                   color_red, mode, color_reset
@@ -533,7 +532,7 @@ static void rofi_collect_modi_dir ( const char *base_dir )
                 Mode *m = NULL;
                 if ( g_module_symbol ( mod, "mode", (gpointer *) &m ) ) {
                     if ( m->abi_version != ABI_VERSION ) {
-                        fprintf ( stderr, "ABI version of plugin does not match: %08X expecting: %08X\n", m->abi_version, ABI_VERSION );
+                        g_warning ( "ABI version of plugin does not match: %08X expecting: %08X", m->abi_version, ABI_VERSION );
                         g_module_close ( mod );
                     }
                     else {
@@ -544,7 +543,7 @@ static void rofi_collect_modi_dir ( const char *base_dir )
                     }
                 }
                 else {
-                    fprintf ( stderr, "Symbol 'mode' not found in module: %s\n", fn );
+                    g_warning ( "Symbol 'mode' not found in module: %s", fn );
                     g_module_close ( mod );
                 }
             }
@@ -622,7 +621,7 @@ static int add_mode ( const char * token )
         }
         else {
             // Report error, don't continue.
-            fprintf ( stderr, "Invalid script mode: %s\n", token );
+            g_warning ( "Invalid script mode: %s", token );
         }
     }
     return ( index == num_modi ) ? -1 : (int) index;
@@ -664,7 +663,7 @@ static gboolean main_loop_x11_event_handler ( xcb_generic_event_t *ev, G_GNUC_UN
     if ( ev == NULL ) {
         int status = xcb_connection_has_error ( xcb->connection );
         if(status > 0) {
-            fprintf ( stderr, "The XCB connection to X server had a fatal error: %d\n", status );
+            g_warning ( "The XCB connection to X server had a fatal error: %d", status );
             g_main_loop_quit ( main_loop );
             return G_SOURCE_REMOVE;
         } else {
@@ -732,7 +731,7 @@ static void error_trap_push ( G_GNUC_UNUSED SnDisplay *display, G_GNUC_UNUSED xc
 static void error_trap_pop ( G_GNUC_UNUSED SnDisplay *display, xcb_connection_t *xdisplay )
 {
     if ( error_trap_depth == 0 ) {
-        fprintf ( stderr, "Error trap underflow!\n" );
+        g_warning ( "Error trap underflow!" );
         exit ( EXIT_FAILURE );
     }
 
@@ -747,7 +746,7 @@ static gboolean lazy_grab_pointer ( G_GNUC_UNUSED gpointer data )
 {
     // After 5 sec.
     if ( lazy_grab_retry_count_pt > ( 5 * 1000 ) ) {
-        fprintf ( stderr, "Failed to grab pointer after %u times. Giving up.\n", lazy_grab_retry_count_pt );
+        g_warning ( "Failed to grab pointer after %u times. Giving up.", lazy_grab_retry_count_pt );
         return G_SOURCE_REMOVE;
     }
     if ( take_pointer ( xcb_stuff_get_root_window ( xcb ), 0 ) ) {
@@ -760,7 +759,7 @@ static gboolean lazy_grab_keyboard ( G_GNUC_UNUSED gpointer data )
 {
     // After 5 sec.
     if ( lazy_grab_retry_count_kb > ( 5 * 1000 ) ) {
-        fprintf ( stderr, "Failed to grab keyboard after %u times. Giving up.\n", lazy_grab_retry_count_kb );
+        g_warning ( "Failed to grab keyboard after %u times. Giving up.", lazy_grab_retry_count_kb );
         g_main_loop_quit (  main_loop );
         return G_SOURCE_REMOVE;
     }
@@ -792,12 +791,12 @@ static gboolean startup ( G_GNUC_UNUSED gpointer data )
     if ( ( window_flags & MENU_NORMAL_WINDOW ) == 0 ) {
         if ( find_arg ( "-no-lazy-grab" ) >= 0 ) {
             if ( !take_keyboard ( xcb_stuff_get_root_window ( xcb ), 500 ) ) {
-                fprintf ( stderr, "Failed to grab keyboard, even after %d uS.", 500 * 1000 );
+                g_warning ( "Failed to grab keyboard, even after %d uS.", 500 * 1000 );
                 g_main_loop_quit ( main_loop );
                 return G_SOURCE_REMOVE;
             }
             if ( !take_pointer ( xcb_stuff_get_root_window ( xcb ), 100 ) ) {
-                fprintf ( stderr, "Failed to grab mouse pointer, even after %d uS.", 100 * 1000 );
+                g_warning ( "Failed to grab mouse pointer, even after %d uS.", 100 * 1000 );
             }
         }
         else {
@@ -874,7 +873,7 @@ static gboolean startup ( G_GNUC_UNUSED gpointer data )
             run_switcher ( index );
         }
         else {
-            fprintf ( stderr, "The %s mode has not been enabled\n", sname );
+            g_warning ( "The %s mode has not been enabled", sname );
             g_main_loop_quit ( main_loop );
             return G_SOURCE_REMOVE;
         }
@@ -908,9 +907,9 @@ int main ( int argc, char *argv[] )
     // Version
     if ( find_arg (  "-v" ) >= 0 || find_arg (  "-version" ) >= 0 ) {
 #ifdef GIT_VERSION
-        fprintf ( stdout, "Version: "GIT_VERSION "\n" );
+        g_print ( "Version: "GIT_VERSION "\n" );
 #else
-        fprintf ( stdout, "Version: "VERSION "\n" );
+        g_print ( "Version: "VERSION "\n" );
 #endif
         return EXIT_SUCCESS;
     }
@@ -935,7 +934,7 @@ int main ( int argc, char *argv[] )
     cache_dir = g_get_user_cache_dir ();
 
     if ( g_mkdir_with_parents ( cache_dir, 0700 ) < 0 ) {
-        fprintf ( stderr, "Failed to create cache directory: %s\n", strerror ( errno ) );
+        g_warning ( "Failed to create cache directory: %s", g_strerror ( errno ) );
         return EXIT_FAILURE;
     }
 
@@ -943,7 +942,7 @@ int main ( int argc, char *argv[] )
     const char *path = g_get_user_runtime_dir ();
     if ( path ) {
         if ( g_mkdir_with_parents ( path, 0700 ) < 0 ) {
-            g_warning ( "Failed to create user runtime directory: %s with error: %s\n", path, strerror ( errno ) );
+            g_warning ( "Failed to create user runtime directory: %s with error: %s", path, g_strerror ( errno ) );
             pidfile = g_build_filename ( g_get_home_dir (), ".rofi.pid", NULL );
         }
         else {
@@ -966,7 +965,7 @@ int main ( int argc, char *argv[] )
 
     TICK ();
     if ( setlocale ( LC_ALL, "" ) == NULL ) {
-        fprintf ( stderr, "Failed to set locale.\n" );
+        g_warning ( "Failed to set locale." );
         cleanup ();
         return EXIT_FAILURE;
     }
@@ -978,7 +977,7 @@ int main ( int argc, char *argv[] )
 
     xcb->connection = xcb_connect ( display_str, &xcb->screen_nbr );
     if ( xcb_connection_has_error ( xcb->connection ) ) {
-        fprintf ( stderr, "Failed to open display: %s", display_str );
+        g_warning( "Failed to open display: %s", display_str );
         cleanup ();
         return EXIT_FAILURE;
     }
@@ -996,7 +995,7 @@ int main ( int argc, char *argv[] )
     xcb_generic_error_t      *errors = NULL;
     xcb_ewmh_init_atoms_replies ( &xcb->ewmh, ac, &errors );
     if ( errors ) {
-        fprintf ( stderr, "Failed to create EWMH atoms\n" );
+        g_warning ( "Failed to create EWMH atoms" );
         free ( errors );
     }
     // Discover the current active window manager.
@@ -1005,14 +1004,14 @@ int main ( int argc, char *argv[] )
 
     if ( xkb_x11_setup_xkb_extension ( xcb->connection, XKB_X11_MIN_MAJOR_XKB_VERSION, XKB_X11_MIN_MINOR_XKB_VERSION,
                                        XKB_X11_SETUP_XKB_EXTENSION_NO_FLAGS, NULL, NULL, &xkb.first_event, NULL ) < 0 ) {
-        fprintf ( stderr, "cannot setup XKB extension!\n" );
+        g_warning ( "cannot setup XKB extension!" );
         cleanup ();
         return EXIT_FAILURE;
     }
 
     xkb.context = xkb_context_new ( XKB_CONTEXT_NO_FLAGS );
     if ( xkb.context == NULL ) {
-        fprintf ( stderr, "cannot create XKB context!\n" );
+        g_warning ( "cannot create XKB context!" );
         cleanup ();
         return EXIT_FAILURE;
     }
@@ -1063,13 +1062,13 @@ int main ( int argc, char *argv[] )
 
     xkb.keymap = xkb_x11_keymap_new_from_device ( xkb.context, xcb->connection, xkb.device_id, XKB_KEYMAP_COMPILE_NO_FLAGS );
     if ( xkb.keymap == NULL ) {
-        fprintf ( stderr, "Failed to get Keymap for current keyboard device.\n" );
+        g_warning ( "Failed to get Keymap for current keyboard device." );
         cleanup ();
         return EXIT_FAILURE;
     }
     xkb.state = xkb_x11_state_new_from_device ( xkb.keymap, xcb->connection, xkb.device_id );
     if ( xkb.state == NULL ) {
-        fprintf ( stderr, "Failed to get state object for current keyboard device.\n" );
+        g_warning ( "Failed to get state object for current keyboard device." );
         cleanup ();
         return EXIT_FAILURE;
     }
@@ -1079,18 +1078,18 @@ int main ( int argc, char *argv[] )
         xkb.compose.state = xkb_compose_state_new ( xkb.compose.table, 0 );
     }
     else {
-        fprintf ( stderr, "Failed to get keyboard compose table. Trying to limp on.\n" );
+        g_warning ( "Failed to get keyboard compose table. Trying to limp on." );
     }
 
     if ( xcb_connection_has_error ( xcb->connection ) ) {
-        fprintf ( stderr, "Connection has error\n" );
+        g_warning ( "Connection has error" );
         cleanup ();
         return EXIT_FAILURE;
     }
     x11_setup ( &xkb );
     TICK_N ( "Setup xkb" );
     if ( xcb_connection_has_error ( xcb->connection ) ) {
-        fprintf ( stderr, "Connection has error\n" );
+        g_warning ( "Connection has error" );
         cleanup ();
         return EXIT_FAILURE;
     }
@@ -1100,7 +1099,7 @@ int main ( int argc, char *argv[] )
     // startup not.
     xcb->sndisplay = sn_xcb_display_new ( xcb->connection, error_trap_push, error_trap_pop );
     if ( xcb_connection_has_error ( xcb->connection ) ) {
-        fprintf ( stderr, "Connection has error\n" );
+        g_warning ( "Connection has error" );
         cleanup ();
         return EXIT_FAILURE;
     }
@@ -1109,7 +1108,7 @@ int main ( int argc, char *argv[] )
         xcb->sncontext = sn_launchee_context_new_from_environment ( xcb->sndisplay, xcb->screen_nbr );
     }
     if ( xcb_connection_has_error ( xcb->connection ) ) {
-        fprintf ( stderr, "Connection has error\n" );
+        g_warning ( "Connection has error" );
         cleanup ();
         return EXIT_FAILURE;
     }
@@ -1162,11 +1161,11 @@ int main ( int argc, char *argv[] )
     }
     if ( rofi_theme_is_empty ( ) ) {
         if ( rofi_theme_parse_string ( default_theme ) ) {
-            fprintf ( stderr, "Failed to parse default theme. Giving up..\n" );
+            g_warning ( "Failed to parse default theme. Giving up.." );
             if ( list_of_error_msgs ) {
                 for ( GList *iter = g_list_first ( list_of_error_msgs );
                       iter != NULL; iter = g_list_next ( iter ) ) {
-                    fprintf ( stderr, "Error: %s%s%s\n",
+                    g_warning ( "Error: %s%s%s",
                               color_bold, ( (GString *) iter->data )->str, color_reset );
                 }
             }
diff --git a/source/theme.c b/source/theme.c
index 4fd41003..e9f145ef 100644
--- a/source/theme.c
+++ b/source/theme.c
@@ -1,3 +1,6 @@
+
+#define G_LOG_DOMAIN    "Theme"
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
@@ -10,10 +13,6 @@
 #include "view.h"
 #include "rofi.h"
 
-/** Logging domain for theme */
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN    "Theme"
-
 /**
  * Name of the property type
  */
diff --git a/source/view.c b/source/view.c
index 8c1064d1..3bbba504 100644
--- a/source/view.c
+++ b/source/view.c
@@ -24,6 +24,9 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
+/** The Rofi View log domain */
+#define G_LOG_DOMAIN    "View"
+
 #include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -63,10 +66,6 @@
 
 #include "theme.h"
 
-/** The Rofi View log domain */
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN    "View"
-
 #include "xcb.h"
 /**
  * @param state The handle to the view
@@ -178,12 +177,12 @@ static void menu_capture_screenshot ( void )
     const char *outp = g_getenv ( "ROFI_PNG_OUTPUT" );
     if ( CacheState.edit_surf == NULL ) {
         // Nothing to store.
-        fprintf ( stderr, "There is no rofi surface to store\n" );
+        g_warning ( "There is no rofi surface to store" );
         return;
     }
     const char *xdg_pict_dir = g_get_user_special_dir ( G_USER_DIRECTORY_PICTURES );
     if ( outp == NULL && xdg_pict_dir == NULL ) {
-        fprintf ( stderr, "XDG user picture directory or ROFI_PNG_OUTPUT is not set. Cannot store screenshot.\n" );
+        g_warning ( "XDG user picture directory or ROFI_PNG_OUTPUT is not set. Cannot store screenshot." );
         return;
     }
     // Get current time.
@@ -210,10 +209,10 @@ static void menu_capture_screenshot ( void )
     else {
         fpath = g_strdup ( outp );
     }
-    fprintf ( stderr, color_green "Storing screenshot %s\n"color_reset, fpath );
+    g_warning ( color_green "Storing screenshot %s\n"color_reset, fpath );
     cairo_status_t status = cairo_surface_write_to_png ( CacheState.edit_surf, fpath );
     if ( status != CAIRO_STATUS_SUCCESS ) {
-        fprintf ( stderr, "Failed to produce screenshot '%s', got error: '%s'\n", fpath,
+        g_warning ( "Failed to produce screenshot '%s', got error: '%s'", fpath,
                   cairo_status_to_string ( status ) );
     }
     g_free ( fpath );
@@ -978,7 +977,7 @@ void rofi_view_update ( RofiViewState *state, gboolean qr )
 static void rofi_view_paste ( RofiViewState *state, xcb_selection_notify_event_t *xse )
 {
     if ( xse->property == XCB_ATOM_NONE ) {
-        fprintf ( stderr, "Failed to convert selection\n" );
+        g_warning ( "Failed to convert selection" );
     }
     else if ( xse->property == xcb->ewmh.UTF8_STRING ) {
         gchar *text = window_get_text_prop ( CacheState.main_window, xcb->ewmh.UTF8_STRING );
@@ -999,7 +998,7 @@ static void rofi_view_paste ( RofiViewState *state, xcb_selection_notify_event_t
         g_free ( text );
     }
     else {
-        fprintf ( stderr, "Failed\n" );
+        g_warning ( "Failed" );
     }
 }
 
@@ -1443,7 +1442,7 @@ void rofi_view_itterrate ( RofiViewState *state, xcb_generic_event_t *ev, xkb_st
 
                 CacheState.edit_surf = cairo_xcb_surface_create ( xcb->connection, CacheState.edit_pixmap, visual, state->width, state->height );
                 CacheState.edit_draw = cairo_create ( CacheState.edit_surf );
-                g_debug ( "Re-size window based external request: %d %d\n", state->width, state->height );
+                g_debug ( "Re-size window based external request: %d %d", state->width, state->height );
                 widget_resize ( WIDGET ( state->main_window ), state->width, state->height );
             }
         }
@@ -1791,7 +1790,7 @@ void rofi_view_workers_initialize ( void )
     }
     // If error occured during setup of pool, tell user and exit.
     if ( error != NULL ) {
-        fprintf ( stderr, "Failed to setup thread pool: '%s'", error->message );
+        g_warning ( "Failed to setup thread pool: '%s'", error->message );
         g_error_free ( error );
         exit ( EXIT_FAILURE );
     }
diff --git a/source/widgets/box.c b/source/widgets/box.c
index cc65fc47..796f36d6 100644
--- a/source/widgets/box.c
+++ b/source/widgets/box.c
@@ -24,6 +24,8 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
+#define G_LOG_DOMAIN         "Widgets.Box"
+
 #include <config.h>
 #include <stdio.h>
 #include "widgets/widget.h"
@@ -31,9 +33,6 @@
 #include "widgets/box.h"
 #include "theme.h"
 
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN         "Widgets.Box"
-
 /** Default spacing used in the box*/
 #define DEFAULT_SPACING    2
 
diff --git a/source/widgets/container.c b/source/widgets/container.c
index 8d564b66..d2a096c8 100644
--- a/source/widgets/container.c
+++ b/source/widgets/container.c
@@ -24,6 +24,8 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
+#define G_LOG_DOMAIN    "Widgets.Window"
+
 #include <config.h>
 #include <stdio.h>
 #include "widgets/widget.h"
@@ -31,9 +33,6 @@
 #include "widgets/container.h"
 #include "theme.h"
 
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN    "Widgets.Window"
-
 struct _window
 {
     widget widget;
diff --git a/source/x11-helper.c b/source/x11-helper.c
index 710b7bfa..6e585391 100644
--- a/source/x11-helper.c
+++ b/source/x11-helper.c
@@ -25,6 +25,10 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
  */
+
+/** Log domain for this module */
+#define G_LOG_DOMAIN    "X11Helper"
+
 #include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -52,11 +56,6 @@
 #define INTERSECT( x, y, x1, y1, w1, h1 )    ( ( ( ( x ) >= ( x1 ) ) && ( ( x ) < ( x1 + w1 ) ) ) && ( ( ( y ) >= ( y1 ) ) && ( ( y ) < ( y1 + h1 ) ) ) )
 #include "x11-helper.h"
 #include "xkb-internal.h"
-
-/** Log domain for this module */
-#undef G_LOG_DOMAIN
-#define G_LOG_DOMAIN    "X11Helper"
-
 WindowManager current_window_manager = WM_EWHM;
 
 /**
@@ -523,7 +522,7 @@ int monitor_active ( workarea *mon )
             if ( monitor_get_dimension ( mon_id, mon ) ) {
                 return TRUE;
             }
-            fprintf ( stderr, "Failed to find selected monitor.\n" );
+            g_warning ( "Failed to find selected monitor." );
         }
         else {
             return monitor_active_from_id ( mon_id, mon );
@@ -538,7 +537,7 @@ int take_pointer ( xcb_window_t w, int iters )
     int i = 0;
     while ( TRUE ) {
         if ( xcb_connection_has_error ( xcb->connection ) ) {
-            fprintf ( stderr, "Connection has error\n" );
+            g_warning ( "Connection has error" );
             exit ( EXIT_FAILURE );
         }
         xcb_grab_pointer_cookie_t cc = xcb_grab_pointer ( xcb->connection, 1, w, XCB_EVENT_MASK_BUTTON_RELEASE,
@@ -563,7 +562,7 @@ int take_keyboard ( xcb_window_t w, int iters )
     int i = 0;
     while ( TRUE ) {
         if ( xcb_connection_has_error ( xcb->connection ) ) {
-            fprintf ( stderr, "Connection has error\n" );
+            g_warning ( "Connection has error" );
             exit ( EXIT_FAILURE );
         }
         xcb_grab_keyboard_cookie_t cc = xcb_grab_keyboard ( xcb->connection,
diff --git a/source/xrmoptions.c b/source/xrmoptions.c
index dd200a3d..a128aae9 100644
--- a/source/xrmoptions.c
+++ b/source/xrmoptions.c
@@ -368,7 +368,7 @@ static void __config_parser_set_property ( XrmOption *option, const Property *p
 {
     if ( option->type == xrm_String  ) {
         if ( p->type != P_STRING ) {
-            fprintf ( stderr, "Option: %s needs to be set with a string.\n", option->name );
+            g_warning ( "Option: %s needs to be set with a string.", option->name );
             return;
         }
         if ( ( option )->mem != NULL ) {
@@ -383,7 +383,7 @@ static void __config_parser_set_property ( XrmOption *option, const Property *p
     }
     else if ( option->type == xrm_Number ) {
         if ( p->type != P_INTEGER ) {
-            fprintf ( stderr, "Option: %s needs to be set with a number.\n", option->name );
+            g_warning ( "Option: %s needs to be set with a number.", option->name );
             return;
         }
         *( option->value.snum ) = p->value.i;
@@ -391,7 +391,7 @@ static void __config_parser_set_property ( XrmOption *option, const Property *p
     }
     else if ( option->type == xrm_SNumber ) {
         if ( p->type != P_INTEGER ) {
-            fprintf ( stderr, "Option: %s needs to be set with a number.\n", option->name );
+            g_warning ( "Option: %s needs to be set with a number.", option->name );
             return;
         }
         *( option->value.num ) = (unsigned int ) ( p->value.i );
@@ -399,7 +399,7 @@ static void __config_parser_set_property ( XrmOption *option, const Property *p
     }
     else if ( option->type == xrm_Boolean ) {
         if ( p->type != P_BOOLEAN ) {
-            fprintf ( stderr, "Option: %s needs to be set with a boolean.\n", option->name );
+            g_warning ( "Option: %s needs to be set with a boolean.", option->name );
             return;
         }
         *( option->value.num ) = ( p->value.b );