Sort headers using clang-tidy
[geeqie.git] / src / remote.cc
index 9fdc0ef..4ece932 100644 (file)
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#include "main.h"
 #include "remote.h"
 
+#include <config.h>
+
 #include "cache-maint.h"
-#include "collect.h"
 #include "collect-io.h"
+#include "collect.h"
+#include "compat.h"
+#include "debug.h"
 #include "exif.h"
 #include "filedata.h"
 #include "filefilter.h"
 #include "image.h"
 #include "img-view.h"
+#include "intl.h"
 #include "layout-image.h"
 #include "layout-util.h"
+#include "main-defines.h"
+#include "main.h"
 #include "misc.h"
 #include "pixbuf-renderer.h"
+#include "rcfile.h"
 #include "slideshow.h"
 #include "ui-fileops.h"
-#include "rcfile.h"
+#include "ui-misc.h"
+#include "utilops.h"
 #include "view-file.h"
 
+#include <csignal>
 #include <sys/socket.h>
 #include <sys/un.h>
-#include <signal.h>
 
 #include "glua.h"
 
-#define SERVER_MAX_CLIENTS 8
+enum {
+       SERVER_MAX_CLIENTS = 8
+};
 
-#define REMOTE_SERVER_BACKLOG 4
+enum {
+       REMOTE_SERVER_BACKLOG = 4
+};
 
 
 #ifndef UNIX_PATH_MAX
@@ -59,17 +71,15 @@ static RemoteConnection *remote_client_open(const gchar *path);
 static gint remote_client_send(RemoteConnection *rc, const gchar *text);
 static void gr_raise(const gchar *text, GIOChannel *channel, gpointer data);
 
-static LayoutWindow *lw_id = NULL; /* points to the window set by the --id option */
+static LayoutWindow *lw_id = nullptr; /* points to the window set by the --id option */
 
-typedef struct _RemoteClient RemoteClient;
-struct _RemoteClient {
+struct RemoteClient {
        gint fd;
        guint channel_id; /* event source id */
        RemoteConnection *rc;
 };
 
-typedef struct _RemoteData RemoteData;
-struct _RemoteData {
+struct RemoteData {
        CollectionData *command_collection;
        GList *file_list;
        gboolean single_dir;
@@ -85,17 +95,17 @@ static gboolean print0 = FALSE;
  * command was made from. Some remote commands require this. The
  * value is stored here
  */
-static gchar *pwd = NULL;
+static gchar *pwd = nullptr;
 
 /**
  * @brief Ensures file path is absolute.
  * @param[in] filename Filepath, absolute or relative to calling directory
  * @returns absolute path
- * 
+ *
  * If first character of input filepath is not the directory
  * separator, assume it as a relative path and prepend
  * the directory the remote command was initiated from
- * 
+ *
  * Return value must be freed with g_free()
  */
 static gchar *set_pwd(gchar *filename)
@@ -116,21 +126,21 @@ static gchar *set_pwd(gchar *filename)
 
 static gboolean remote_server_client_cb(GIOChannel *source, GIOCondition condition, gpointer data)
 {
-       RemoteClient *client = data;
+       auto client = static_cast<RemoteClient *>(data);
        RemoteConnection *rc;
        GIOStatus status = G_IO_STATUS_NORMAL;
 
-       lw_id = NULL;
+       lw_id = nullptr;
        rc = client->rc;
 
        if (condition & G_IO_IN)
                {
-               gchar *buffer = NULL;
-               GError *error = NULL;
+               gchar *buffer = nullptr;
+               GError *error = nullptr;
                gsize termpos;
                /** @FIXME it should be possible to terminate the command with a null character */
                g_io_channel_set_line_term(source, "<gq_end_of_command>", -1);
-               while ((status = g_io_channel_read_line(source, &buffer, NULL, &termpos, &error)) == G_IO_STATUS_NORMAL)
+               while ((status = g_io_channel_read_line(source, &buffer, nullptr, &termpos, &error)) == G_IO_STATUS_NORMAL)
                        {
                        if (buffer)
                                {
@@ -139,12 +149,12 @@ static gboolean remote_server_client_cb(GIOChannel *source, GIOCondition conditi
                                if (strlen(buffer) > 0)
                                        {
                                        if (rc->read_func) rc->read_func(rc, buffer, source, rc->read_data);
-                                       g_io_channel_write_chars(source, "<gq_end_of_command>", -1, NULL, NULL); /* empty line finishes the command */
-                                       g_io_channel_flush(source, NULL);
+                                       g_io_channel_write_chars(source, "<gq_end_of_command>", -1, nullptr, nullptr); /* empty line finishes the command */
+                                       g_io_channel_flush(source, nullptr);
                                        }
                                g_free(buffer);
 
-                               buffer = NULL;
+                               buffer = nullptr;
                                }
                        }
 
@@ -187,8 +197,8 @@ static void remote_server_client_add(RemoteConnection *rc, gint fd)
        client->fd = fd;
 
        channel = g_io_channel_unix_new(fd);
-       client->channel_id = g_io_add_watch_full(channel, G_PRIORITY_DEFAULT, G_IO_IN | G_IO_HUP,
-                                                remote_server_client_cb, client, NULL);
+       client->channel_id = g_io_add_watch_full(channel, G_PRIORITY_DEFAULT, static_cast<GIOCondition>(G_IO_IN | G_IO_HUP),
+                                                remote_server_client_cb, client, nullptr);
        g_io_channel_unref(channel);
 
        rc->clients = g_list_append(rc->clients, client);
@@ -199,7 +209,7 @@ static void remote_server_clients_close(RemoteConnection *rc)
 {
        while (rc->clients)
                {
-               RemoteClient *client = rc->clients->data;
+               auto client = static_cast<RemoteClient *>(rc->clients->data);
 
                rc->clients = g_list_remove(rc->clients, client);
 
@@ -209,13 +219,13 @@ static void remote_server_clients_close(RemoteConnection *rc)
                }
 }
 
-static gboolean remote_server_read_cb(GIOChannel *UNUSED(source), GIOCondition UNUSED(condition), gpointer data)
+static gboolean remote_server_read_cb(GIOChannel *, GIOCondition, gpointer data)
 {
-       RemoteConnection *rc = data;
+       auto rc = static_cast<RemoteConnection *>(data);
        gint fd;
        guint alen;
 
-       fd = accept(rc->fd, NULL, &alen);
+       fd = accept(rc->fd, nullptr, &alen);
        if (fd == -1)
                {
                log_printf("error accepting socket: %s\n", strerror(errno));
@@ -246,28 +256,35 @@ static RemoteConnection *remote_server_open(const gchar *path)
 {
        RemoteConnection *rc;
        struct sockaddr_un addr;
-       gint sun_path_len;
        gint fd;
        GIOChannel *channel;
 
+       if (strlen(path) >= sizeof(addr.sun_path))
+               {
+               log_printf("Address is too long: %s\n", path);
+               return nullptr;
+               }
+
        if (remote_server_exists(path))
                {
                log_printf("Address already in use: %s\n", path);
-               return NULL;
+               return nullptr;
                }
 
        fd = socket(PF_UNIX, SOCK_STREAM, 0);
-       if (fd == -1) return NULL;
+       if (fd == -1) return nullptr;
 
        addr.sun_family = AF_UNIX;
-       sun_path_len = MIN(strlen(path) + 1, UNIX_PATH_MAX);
-       strncpy(addr.sun_path, path, sun_path_len);
-       if (bind(fd, (const struct sockaddr*)&addr, sizeof(addr)) == -1 ||
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-truncation"
+       strncpy(addr.sun_path, path, sizeof(addr.sun_path));
+#pragma GCC diagnostic pop
+       if (bind(fd, reinterpret_cast<const struct sockaddr*>(&addr), sizeof(addr)) == -1 ||
            listen(fd, REMOTE_SERVER_BACKLOG) == -1)
                {
                log_printf("error subscribing to socket: %s\n", strerror(errno));
                close(fd);
-               return NULL;
+               return nullptr;
                }
 
        rc = g_new0(RemoteConnection, 1);
@@ -277,16 +294,16 @@ static RemoteConnection *remote_server_open(const gchar *path)
        rc->path = g_strdup(path);
 
        channel = g_io_channel_unix_new(rc->fd);
-       g_io_channel_set_flags(channel, G_IO_FLAG_NONBLOCK, NULL);
+       g_io_channel_set_flags(channel, G_IO_FLAG_NONBLOCK, nullptr);
 
        rc->channel_id = g_io_add_watch_full(channel, G_PRIORITY_DEFAULT, G_IO_IN,
-                                            remote_server_read_cb, rc, NULL);
+                                            remote_server_read_cb, rc, nullptr);
        g_io_channel_unref(channel);
 
        return rc;
 }
 
-static void remote_server_subscribe(RemoteConnection *rc, RemoteReadFunc *func, gpointer data)
+static void remote_server_subscribe(RemoteConnection *rc, RemoteConnection::ReadFunc *func, gpointer data)
 {
        if (!rc || !rc->server) return;
 
@@ -300,22 +317,25 @@ static RemoteConnection *remote_client_open(const gchar *path)
        RemoteConnection *rc;
        struct stat st;
        struct sockaddr_un addr;
-       gint sun_path_len;
        gint fd;
 
-       if (stat(path, &st) != 0 || !S_ISSOCK(st.st_mode)) return NULL;
+       if (strlen(path) >= sizeof(addr.sun_path)) return nullptr;
+
+       if (stat(path, &st) != 0 || !S_ISSOCK(st.st_mode)) return nullptr;
 
        fd = socket(PF_UNIX, SOCK_STREAM, 0);
-       if (fd == -1) return NULL;
+       if (fd == -1) return nullptr;
 
        addr.sun_family = AF_UNIX;
-       sun_path_len = MIN(strlen(path) + 1, UNIX_PATH_MAX);
-       strncpy(addr.sun_path, path, sun_path_len);
-       if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-truncation"
+       strncpy(addr.sun_path, path, sizeof(addr.sun_path));
+#pragma GCC diagnostic pop
+       if (connect(fd, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr)) == -1)
                {
                DEBUG_1("error connecting to socket: %s", strerror(errno));
                close(fd);
-               return NULL;
+               return nullptr;
                }
 
        rc = g_new0(RemoteConnection, 1);
@@ -328,16 +348,17 @@ static RemoteConnection *remote_client_open(const gchar *path)
 
 static sig_atomic_t sigpipe_occurred = FALSE;
 
-static void sighandler_sigpipe(gint UNUSED(sig))
+static void sighandler_sigpipe(gint)
 {
        sigpipe_occurred = TRUE;
 }
 
 static gboolean remote_client_send(RemoteConnection *rc, const gchar *text)
 {
-       struct sigaction new_action, old_action;
+       struct sigaction new_action;
+       struct sigaction old_action;
        gboolean ret = FALSE;
-       GError *error = NULL;
+       GError *error = nullptr;
        GIOChannel *channel;
 
        if (!rc || rc->server) return FALSE;
@@ -354,8 +375,8 @@ static gboolean remote_client_send(RemoteConnection *rc, const gchar *text)
 
        channel = g_io_channel_unix_new(rc->fd);
 
-       g_io_channel_write_chars(channel, text, -1, NULL, &error);
-       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, &error);
+       g_io_channel_write_chars(channel, text, -1, nullptr, &error);
+       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, &error);
        g_io_channel_flush(channel, &error);
 
        if (error)
@@ -371,10 +392,10 @@ static gboolean remote_client_send(RemoteConnection *rc, const gchar *text)
 
        if (ret)
                {
-               gchar *buffer = NULL;
+               gchar *buffer = nullptr;
                gsize termpos;
                g_io_channel_set_line_term(channel, "<gq_end_of_command>", -1);
-               while (g_io_channel_read_line(channel, &buffer, NULL, &termpos, &error) == G_IO_STATUS_NORMAL)
+               while (g_io_channel_read_line(channel, &buffer, nullptr, &termpos, &error) == G_IO_STATUS_NORMAL)
                        {
                        if (buffer)
                                {
@@ -385,7 +406,7 @@ static gboolean remote_client_send(RemoteConnection *rc, const gchar *text)
                                        break;
                                        }
                                buffer[termpos] = '\0';
-                               if (g_strstr_len(buffer, -1, "print0") != 0)
+                               if (g_strstr_len(buffer, -1, "print0") != nullptr)
                                        {
                                        print0 = TRUE;
                                        }
@@ -401,7 +422,7 @@ static gboolean remote_client_send(RemoteConnection *rc, const gchar *text)
                                                }
                                        }
                                g_free(buffer);
-                               buffer = NULL;
+                               buffer = nullptr;
                                }
                        }
 
@@ -415,7 +436,7 @@ static gboolean remote_client_send(RemoteConnection *rc, const gchar *text)
 
 
        /* restore the original signal handler */
-       sigaction(SIGPIPE, &old_action, NULL);
+       sigaction(SIGPIPE, &old_action, nullptr);
        g_io_channel_unref(channel);
        return ret;
 }
@@ -447,14 +468,14 @@ void remote_close(RemoteConnection *rc)
  *-----------------------------------------------------------------------------
  */
 
-static void gr_image_next(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_image_next(const gchar *, GIOChannel *, gpointer)
 {
        layout_image_next(lw_id);
 }
 
-static void gr_new_window(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_new_window(const gchar *, GIOChannel *, gpointer)
 {
-       LayoutWindow *lw = NULL;
+       LayoutWindow *lw = nullptr;
 
        if (!layout_valid(&lw)) return;
 
@@ -463,51 +484,51 @@ static void gr_new_window(const gchar *UNUSED(text), GIOChannel *UNUSED(channel)
        layout_set_path(lw_id, pwd);
 }
 
-static gboolean gr_close_window_cb()
+static gboolean gr_close_window_cb(gpointer)
 {
        if (!layout_valid(&lw_id)) return FALSE;
 
-       layout_menu_close_cb(NULL, lw_id);
+       layout_menu_close_cb(nullptr, lw_id);
 
-       return FALSE;
+       return G_SOURCE_REMOVE;
 }
 
-static void gr_close_window(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_close_window(const gchar *, GIOChannel *, gpointer)
 {
-       g_idle_add(gr_close_window_cb, NULL);
+       g_idle_add((gr_close_window_cb), nullptr);
 }
 
-static void gr_image_prev(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_image_prev(const gchar *, GIOChannel *, gpointer)
 {
        layout_image_prev(lw_id);
 }
 
-static void gr_image_first(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_image_first(const gchar *, GIOChannel *, gpointer)
 {
        layout_image_first(lw_id);
 }
 
-static void gr_image_last(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_image_last(const gchar *, GIOChannel *, gpointer)
 {
        layout_image_last(lw_id);
 }
 
-static void gr_fullscreen_toggle(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_fullscreen_toggle(const gchar *, GIOChannel *, gpointer)
 {
        layout_image_full_screen_toggle(lw_id);
 }
 
-static void gr_fullscreen_start(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_fullscreen_start(const gchar *, GIOChannel *, gpointer)
 {
        layout_image_full_screen_start(lw_id);
 }
 
-static void gr_fullscreen_stop(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_fullscreen_stop(const gchar *, GIOChannel *, gpointer)
 {
        layout_image_full_screen_stop(lw_id);
 }
 
-static void gr_lw_id(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_lw_id(const gchar *text, GIOChannel *, gpointer)
 {
        lw_id = layout_find_by_layout_id(text);
        if (!lw_id)
@@ -517,7 +538,7 @@ static void gr_lw_id(const gchar *text, GIOChannel *UNUSED(channel), gpointer UN
        layout_valid(&lw_id);
 }
 
-static void gr_slideshow_start_rec(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_slideshow_start_rec(const gchar *text, GIOChannel *, gpointer)
 {
        GList *list;
        gchar *tilde_filename;
@@ -528,27 +549,27 @@ static void gr_slideshow_start_rec(const gchar *text, GIOChannel *UNUSED(channel
        g_free(tilde_filename);
 
        layout_valid(&lw_id);
-       list = filelist_recursive_full(dir_fd, lw_id->sort_method, lw_id->sort_ascend);
+       list = filelist_recursive_full(dir_fd, lw_id->options.file_view_list_sort.method, lw_id->options.file_view_list_sort.ascend, lw_id->options.file_view_list_sort.case_sensitive);
        file_data_unref(dir_fd);
        if (!list) return;
-//printf("length: %d\n", g_list_length(list));
+
        layout_image_slideshow_stop(lw_id);
        layout_image_slideshow_start_from_list(lw_id, list);
 }
 
-static void gr_cache_thumb(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_cache_thumb(const gchar *text, GIOChannel *, gpointer)
 {
        if (!g_strcmp0(text, "clear"))
                {
-               cache_maintain_home_remote(FALSE, TRUE, NULL);
+               cache_maintain_home_remote(FALSE, TRUE, nullptr);
                }
        else if (!g_strcmp0(text, "clean"))
                {
-               cache_maintain_home_remote(FALSE, FALSE, NULL);
+               cache_maintain_home_remote(FALSE, FALSE, nullptr);
                }
 }
 
-static void gr_cache_shared(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_cache_shared(const gchar *text, GIOChannel *, gpointer)
 {
        if (!g_strcmp0(text, "clear"))
                cache_manager_standard_process_remote(TRUE);
@@ -556,55 +577,58 @@ static void gr_cache_shared(const gchar *text, GIOChannel *UNUSED(channel), gpoi
                cache_manager_standard_process_remote(FALSE);
 }
 
-static void gr_cache_metadata(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_cache_metadata(const gchar *, GIOChannel *, gpointer)
 {
-       cache_maintain_home_remote(TRUE, FALSE, NULL);
+       cache_maintain_home_remote(TRUE, FALSE, nullptr);
 }
 
-static void gr_cache_render(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_cache_render(const gchar *text, GIOChannel *, gpointer)
 {
-       cache_manager_render_remote(text, FALSE, FALSE, NULL);
+       cache_manager_render_remote(text, FALSE, FALSE, nullptr);
 }
 
-static void gr_cache_render_recurse(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_cache_render_recurse(const gchar *text, GIOChannel *, gpointer)
 {
-       cache_manager_render_remote(text, TRUE, FALSE, NULL);
+       cache_manager_render_remote(text, TRUE, FALSE, nullptr);
 }
 
-static void gr_cache_render_standard(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_cache_render_standard(const gchar *text, GIOChannel *, gpointer)
 {
        if(options->thumbnails.spec_standard)
                {
-               cache_manager_render_remote(text, FALSE, TRUE, NULL);
+               cache_manager_render_remote(text, FALSE, TRUE, nullptr);
                }
 }
 
-static void gr_cache_render_standard_recurse(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_cache_render_standard_recurse(const gchar *text, GIOChannel *, gpointer)
 {
        if(options->thumbnails.spec_standard)
                {
-               cache_manager_render_remote(text, TRUE, TRUE, NULL);
+               cache_manager_render_remote(text, TRUE, TRUE, nullptr);
                }
 }
 
-static void gr_slideshow_toggle(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_slideshow_toggle(const gchar *, GIOChannel *, gpointer)
 {
        layout_image_slideshow_toggle(lw_id);
 }
 
-static void gr_slideshow_start(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_slideshow_start(const gchar *, GIOChannel *, gpointer)
 {
        layout_image_slideshow_start(lw_id);
 }
 
-static void gr_slideshow_stop(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_slideshow_stop(const gchar *, GIOChannel *, gpointer)
 {
        layout_image_slideshow_stop(lw_id);
 }
 
-static void gr_slideshow_delay(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_slideshow_delay(const gchar *text, GIOChannel *, gpointer)
 {
-       gdouble t1, t2, t3, n;
+       gdouble t1;
+       gdouble t2;
+       gdouble t3;
+       gdouble n;
        gint res;
 
        res = sscanf(text, "%lf:%lf:%lf", &t1, &t2, &t3);
@@ -645,10 +669,10 @@ static void gr_slideshow_delay(const gchar *text, GIOChannel *UNUSED(channel), g
                n = 0;
                }
 
-       options->slideshow.delay = (gint)(n * 10.0 + 0.01);
+       options->slideshow.delay = static_cast<gint>(n * 10.0 + 0.01);
 }
 
-static void gr_tools_show(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_tools_show(const gchar *, GIOChannel *, gpointer)
 {
        gboolean popped;
        gboolean hidden;
@@ -659,7 +683,7 @@ static void gr_tools_show(const gchar *UNUSED(text), GIOChannel *UNUSED(channel)
                }
 }
 
-static void gr_tools_hide(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_tools_hide(const gchar *, GIOChannel *, gpointer)
 {
        gboolean popped;
        gboolean hidden;
@@ -670,27 +694,27 @@ static void gr_tools_hide(const gchar *UNUSED(text), GIOChannel *UNUSED(channel)
                }
 }
 
-static gboolean gr_quit_idle_cb(gpointer UNUSED(data))
+static gboolean gr_quit_idle_cb(gpointer)
 {
        exit_program();
 
-       return FALSE;
+       return G_SOURCE_REMOVE;
 }
 
-static void gr_quit(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_quit(const gchar *, GIOChannel *, gpointer)
 {
        /* schedule exit when idle, if done from within a
         * remote handler remote_close will crash
         */
-       g_idle_add(gr_quit_idle_cb, NULL);
+       g_idle_add(gr_quit_idle_cb, nullptr);
 }
 
-static void gr_file_load_no_raise(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_file_load_no_raise(const gchar *text, GIOChannel *, gpointer)
 {
        gchar *filename;
        gchar *tilde_filename;
 
-       if (!download_web_file(text, TRUE, NULL))
+       if (!download_web_file(text, TRUE, nullptr))
                {
                tilde_filename = expand_tilde(text);
                filename = set_pwd(tilde_filename);
@@ -728,17 +752,21 @@ static void gr_file_load(const gchar *text, GIOChannel *channel, gpointer data)
        gr_raise(text, channel, data);
 }
 
-static void gr_pixel_info(const gchar *UNUSED(text), GIOChannel *channel, gpointer UNUSED(data))
+static void gr_pixel_info(const gchar *, GIOChannel *channel, gpointer)
 {
        gchar *pixel_info;
-       gint x_pixel, y_pixel;
-       gint width, height;
-       gint r_mouse, g_mouse, b_mouse;
+       gint x_pixel;
+       gint y_pixel;
+       gint width;
+       gint height;
+       gint r_mouse;
+       gint g_mouse;
+       gint b_mouse;
        PixbufRenderer *pr;
 
        if (!layout_valid(&lw_id)) return;
 
-       pr = (PixbufRenderer*)lw_id->image->pr;
+       pr = reinterpret_cast<PixbufRenderer*>(lw_id->image->pr);
 
        if (pr)
                {
@@ -756,8 +784,8 @@ static void gr_pixel_info(const gchar *UNUSED(text), GIOChannel *channel, gpoint
                                                 x_pixel, y_pixel,
                                                 r_mouse, g_mouse, b_mouse);
 
-                       g_io_channel_write_chars(channel, pixel_info, -1, NULL, NULL);
-                       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+                       g_io_channel_write_chars(channel, pixel_info, -1, nullptr, nullptr);
+                       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 
                        g_free(pixel_info);
                        }
@@ -772,16 +800,19 @@ static void gr_pixel_info(const gchar *UNUSED(text), GIOChannel *channel, gpoint
                }
 }
 
-static void gr_rectangle(const gchar *UNUSED(text), GIOChannel *channel, gpointer UNUSED(data))
+static void gr_rectangle(const gchar *, GIOChannel *channel, gpointer)
 {
        gchar *rectangle_info;
        PixbufRenderer *pr;
-       gint x1, y1, x2, y2;
+       gint x1;
+       gint y1;
+       gint x2;
+       gint y2;
 
        if (!options->draw_rectangle) return;
        if (!layout_valid(&lw_id)) return;
 
-       pr = (PixbufRenderer*)lw_id->image->pr;
+       pr = reinterpret_cast<PixbufRenderer*>(lw_id->image->pr);
 
        if (pr)
                {
@@ -792,14 +823,14 @@ static void gr_rectangle(const gchar *UNUSED(text), GIOChannel *channel, gpointe
                                        (x2 > x1) ? x1 : x2,
                                        (y2 > y1) ? y1 : y2);
 
-               g_io_channel_write_chars(channel, rectangle_info, -1, NULL, NULL);
-               g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+               g_io_channel_write_chars(channel, rectangle_info, -1, nullptr, nullptr);
+               g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 
                g_free(rectangle_info);
                }
 }
 
-static void gr_render_intent(const gchar *UNUSED(text), GIOChannel *channel, gpointer UNUSED(data))
+static void gr_render_intent(const gchar *, GIOChannel *channel, gpointer)
 {
        gchar *render_intent;
 
@@ -822,19 +853,18 @@ static void gr_render_intent(const gchar *UNUSED(text), GIOChannel *channel, gpo
                        break;
                }
 
-       g_io_channel_write_chars(channel, render_intent, -1, NULL, NULL);
-       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+       g_io_channel_write_chars(channel, render_intent, -1, nullptr, nullptr);
+       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 
        g_free(render_intent);
 }
 
 static void get_filelist(const gchar *text, GIOChannel *channel, gboolean recurse)
 {
-       GList *list = NULL;
+       GList *list = nullptr;
        FileFormatClass format_class;
        FileData *dir_fd;
        FileData *fd;
-       GString *out_string = g_string_new(NULL);
        GList *work;
        gchar *tilde_filename;
 
@@ -870,14 +900,15 @@ static void get_filelist(const gchar *text, GIOChannel *channel, gboolean recurs
                }
        else
                {
-               filelist_read(dir_fd, &list, NULL);
+               filelist_read(dir_fd, &list, nullptr);
                }
 
+       GString *out_string = g_string_new(nullptr);
        work = list;
        while (work)
                {
-               fd = work->data;
-               g_string_append_printf(out_string, "%s", fd->path);
+               fd = static_cast<FileData *>(work->data);
+               g_string_append(out_string, fd->path);
                format_class = filter_file_get_class(fd->path);
 
                switch (format_class)
@@ -914,25 +945,25 @@ static void get_filelist(const gchar *text, GIOChannel *channel, gboolean recurs
                work = work->next;
                }
 
-       g_io_channel_write_chars(channel, out_string->str, -1, NULL, NULL);
-       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+       g_io_channel_write_chars(channel, out_string->str, -1, nullptr, nullptr);
+       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 
        g_string_free(out_string, TRUE);
        filelist_free(list);
        file_data_unref(dir_fd);
 }
 
-static void gr_get_selection(const gchar *UNUSED(text), GIOChannel *channel, gboolean UNUSED(data))
+static void gr_get_selection(const gchar *, GIOChannel *channel, gpointer)
 {
        if (!layout_valid(&lw_id)) return;
 
        GList *selected = layout_selection_list(lw_id);  // Keep copy to free.
-       GString *out_string = g_string_new(NULL);
+       GString *out_string = g_string_new(nullptr);
 
        GList *work = selected;
        while (work)
                {
-               FileData *fd = work->data;
+               auto fd = static_cast<FileData *>(work->data);
                g_assert(fd->magick == FD_MAGICK);
 
                g_string_append_printf(out_string, "%s    %s\n",
@@ -942,18 +973,18 @@ static void gr_get_selection(const gchar *UNUSED(text), GIOChannel *channel, gbo
                work = work->next;
                }
 
-       g_io_channel_write_chars(channel, out_string->str, -1, NULL, NULL);
-       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+       g_io_channel_write_chars(channel, out_string->str, -1, nullptr, nullptr);
+       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 
        filelist_free(selected);
        g_string_free(out_string, TRUE);
 }
 
-static void gr_selection_add(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_selection_add(const gchar *text, GIOChannel *, gpointer)
 {
        if (!layout_valid(&lw_id)) return;
 
-       FileData *fd_to_select = NULL;
+       FileData *fd_to_select = nullptr;
        if (strcmp(text, "") == 0)
                {
                // No file specified, use current fd.
@@ -970,7 +1001,7 @@ static void gr_selection_add(const gchar *text, GIOChannel *UNUSED(channel), gpo
                GList *file_list = layout_list(lw_id);
                for (GList *work = file_list; work && !fd_to_select; work = work->next)
                        {
-                       FileData *fd = work->data;
+                       auto fd = static_cast<FileData *>(work->data);
                        if (!strcmp(path, fd->path) || g_str_has_suffix(fd->path, slash_plus_filename))
                                {
                                fd_to_select = file_data_ref(fd);
@@ -979,7 +1010,7 @@ static void gr_selection_add(const gchar *text, GIOChannel *UNUSED(channel), gpo
 
                        for (GList *sidecar = fd->sidecar_files; sidecar && !fd_to_select; sidecar = sidecar->next)
                                {
-                               FileData *side_fd = sidecar->data;
+                               auto side_fd = static_cast<FileData *>(sidecar->data);
                                if (!strcmp(path, side_fd->path)
                                    || g_str_has_suffix(side_fd->path, slash_plus_filename))
                                        {
@@ -1003,19 +1034,19 @@ static void gr_selection_add(const gchar *text, GIOChannel *UNUSED(channel), gpo
 
        if (fd_to_select)
                {
-               GList *to_select = g_list_append(NULL, fd_to_select);
+               GList *to_select = g_list_append(nullptr, fd_to_select);
                // Using the "_list" variant doesn't clear the existing selection.
                layout_select_list(lw_id, to_select);
                filelist_free(to_select);
                }
 }
 
-static void gr_selection_clear(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_selection_clear(const gchar *, GIOChannel *, gpointer)
 {
        layout_select_none(lw_id);  // Checks lw_id validity internally.
 }
 
-static void gr_selection_remove(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_selection_remove(const gchar *text, GIOChannel *, gpointer)
 {
        if (!layout_valid(&lw_id)) return;
 
@@ -1026,10 +1057,10 @@ static void gr_selection_remove(const gchar *text, GIOChannel *UNUSED(channel),
                return;
                }
 
-       FileData *fd_to_deselect = NULL;
-       gchar *path = NULL;
-       gchar *filename = NULL;
-       gchar *slash_plus_filename = NULL;
+       FileData *fd_to_deselect = nullptr;
+       gchar *path = nullptr;
+       gchar *filename = nullptr;
+       gchar *slash_plus_filename = nullptr;
        if (strcmp(text, "") == 0)
                {
                // No file specified, use current fd.
@@ -1050,11 +1081,11 @@ static void gr_selection_remove(const gchar *text, GIOChannel *UNUSED(channel),
                slash_plus_filename = g_strdup_printf("%s%s", G_DIR_SEPARATOR_S, filename);
                }
 
-       GList *prior_link = NULL;  // Stash base for link removal to avoid a second traversal.
-       GList *link_to_remove = NULL;
+       GList *prior_link = nullptr;  // Stash base for link removal to avoid a second traversal.
+       GList *link_to_remove = nullptr;
        for (GList *work = selected; work; prior_link = work, work = work->next)
                {
-               FileData *fd = work->data;
+               auto fd = static_cast<FileData *>(work->data);
                if (fd_to_deselect)
                        {
                        if (fd == fd_to_deselect)
@@ -1094,14 +1125,14 @@ static void gr_selection_remove(const gchar *text, GIOChannel *UNUSED(channel),
                        // Remove first link.
                        selected = g_list_remove_link(selected, link_to_remove);
                        filelist_free(link_to_remove);
-                       link_to_remove = NULL;
+                       link_to_remove = nullptr;
                        }
                else
                        {
                        // Remove a subsequent link.
                        prior_link = g_list_remove_link(prior_link, link_to_remove);
                        filelist_free(link_to_remove);
-                       link_to_remove = NULL;
+                       link_to_remove = nullptr;
                        }
 
                // Re-select all but the deselected item.
@@ -1116,9 +1147,9 @@ static void gr_selection_remove(const gchar *text, GIOChannel *UNUSED(channel),
        g_free(path);
 }
 
-static void gr_collection(const gchar *text, GIOChannel *channel, gpointer UNUSED(data))
+static void gr_collection(const gchar *text, GIOChannel *channel, gpointer)
 {
-       GString *contents = g_string_new(NULL);
+       GString *contents = g_string_new(nullptr);
 
        if (is_collection(text))
                {
@@ -1129,50 +1160,50 @@ static void gr_collection(const gchar *text, GIOChannel *channel, gpointer UNUSE
                return;
                }
 
-       g_io_channel_write_chars(channel, contents->str, -1, NULL, NULL);
-       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+       g_io_channel_write_chars(channel, contents->str, -1, nullptr, nullptr);
+       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 
        g_string_free(contents, TRUE);
 }
 
-static void gr_collection_list(const gchar *UNUSED(text), GIOChannel *channel, gpointer UNUSED(data))
+static void gr_collection_list(const gchar *, GIOChannel *channel, gpointer)
 {
 
-       GList *collection_list = NULL;
+       GList *collection_list = nullptr;
        GList *work;
-       GString *out_string = g_string_new(NULL);
+       GString *out_string = g_string_new(nullptr);
 
-       collect_manager_list(&collection_list, NULL, NULL);
+       collect_manager_list(&collection_list, nullptr, nullptr);
 
        work = collection_list;
        while (work)
                {
-               const gchar *collection_name = work->data;
-               out_string = g_string_append(out_string, g_strdup(collection_name));
+               auto collection_name = static_cast<const gchar *>(work->data);
+               out_string = g_string_append(out_string, collection_name);
                out_string = g_string_append(out_string, "\n");
 
                work = work->next;
                }
 
-       g_io_channel_write_chars(channel, out_string->str, -1, NULL, NULL);
-       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+       g_io_channel_write_chars(channel, out_string->str, -1, nullptr, nullptr);
+       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 
-       string_list_free(collection_list);
+       g_list_free_full(collection_list, g_free);
        g_string_free(out_string, TRUE);
 }
 
-static gboolean wait_cb(const gpointer data)
+static gboolean wait_cb(gpointer data)
 {
        gint position = GPOINTER_TO_INT(data);
        gint x = position >> 16;
        gint y = position - (x << 16);
 
-       gtk_window_move(GTK_WINDOW(lw_id->window), x, y);
+       gq_gtk_window_move(GTK_WINDOW(lw_id->window), x, y);
 
-       return FALSE;
+       return G_SOURCE_REMOVE;
 }
 
-static void gr_geometry(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_geometry(const gchar *text, GIOChannel *, gpointer)
 {
        gchar **geometry;
 
@@ -1184,19 +1215,19 @@ static void gr_geometry(const gchar *text, GIOChannel *UNUSED(channel), gpointer
        if (text[0] == '+')
                {
                geometry = g_strsplit_set(text, "+", 3);
-               if (geometry[1] != NULL && geometry[2] != NULL )
+               if (geometry[1] != nullptr && geometry[2] != nullptr )
                        {
-                       gtk_window_move(GTK_WINDOW(lw_id->window), atoi(geometry[1]), atoi(geometry[2]));
+                       gq_gtk_window_move(GTK_WINDOW(lw_id->window), atoi(geometry[1]), atoi(geometry[2]));
                        }
                }
        else
                {
                geometry = g_strsplit_set(text, "+x", 4);
-               if (geometry[0] != NULL && geometry[1] != NULL)
+               if (geometry[0] != nullptr && geometry[1] != nullptr)
                        {
                        gtk_window_resize(GTK_WINDOW(lw_id->window), atoi(geometry[0]), atoi(geometry[1]));
                        }
-               if (geometry[2] != NULL && geometry[3] != NULL)
+               if (geometry[2] != nullptr && geometry[3] != nullptr)
                        {
                        /* There is an occasional problem with a window_move immediately after a window_resize */
                        g_idle_add(wait_cb, GINT_TO_POINTER((atoi(geometry[2]) << 16) + atoi(geometry[3])));
@@ -1205,20 +1236,20 @@ static void gr_geometry(const gchar *text, GIOChannel *UNUSED(channel), gpointer
        g_strfreev(geometry);
 }
 
-static void gr_filelist(const gchar *text, GIOChannel *channel, gpointer UNUSED(data))
+static void gr_filelist(const gchar *text, GIOChannel *channel, gpointer)
 {
        get_filelist(text, channel, FALSE);
 }
 
-static void gr_filelist_recurse(const gchar *text, GIOChannel *channel, gpointer UNUSED(data))
+static void gr_filelist_recurse(const gchar *text, GIOChannel *channel, gpointer)
 {
        get_filelist(text, channel, TRUE);
 }
 
-static void gr_file_tell(const gchar *UNUSED(text), GIOChannel *channel, gpointer UNUSED(data))
+static void gr_file_tell(const gchar *, GIOChannel *channel, gpointer)
 {
        gchar *out_string;
-       gchar *collection_name = NULL;
+       gchar *collection_name = nullptr;
 
        if (!layout_valid(&lw_id)) return;
 
@@ -1239,14 +1270,14 @@ static void gr_file_tell(const gchar *UNUSED(text), GIOChannel *channel, gpointe
                out_string = g_strconcat(lw_id->dir_fd->path, G_DIR_SEPARATOR_S, NULL);
                }
 
-       g_io_channel_write_chars(channel, out_string, -1, NULL, NULL);
-       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+       g_io_channel_write_chars(channel, out_string, -1, nullptr, nullptr);
+       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 
        g_free(collection_name);
        g_free(out_string);
 }
 
-static void gr_file_info(const gchar *UNUSED(text), GIOChannel *channel, gpointer UNUSED(data))
+static void gr_file_info(const gchar *, GIOChannel *channel, gpointer)
 {
        gchar *filename;
        FileData *fd;
@@ -1263,14 +1294,19 @@ static void gr_file_info(const gchar *UNUSED(text), GIOChannel *channel, gpointe
                {
                filename = g_strdup(image_get_path(lw_id->image));
                fd = file_data_new_group(filename);
-               out_string = g_string_new(NULL);
+               out_string = g_string_new(nullptr);
 
-               format_class = filter_file_get_class(image_get_path(lw_id->image));
-               if (format_class)
+               if (fd->pixbuf)
+                       {
+                       format_class = filter_file_get_class(image_get_path(lw_id->image));
+                       }
+               else
                        {
-                       g_string_append_printf(out_string, _("Class: %s\n"), format_class_list[format_class]);
+                       format_class = FORMAT_CLASS_UNKNOWN;
                        }
 
+               g_string_append_printf(out_string, _("Class: %s\n"), format_class_list[format_class]);
+
                if (fd->page_total > 1)
                        {
                        g_string_append_printf(out_string, _("Page no: %d/%d\n"), fd->page_num + 1, fd->page_total);
@@ -1307,8 +1343,8 @@ static void gr_file_info(const gchar *UNUSED(text), GIOChannel *channel, gpointe
                                }
                        }
 
-               g_io_channel_write_chars(channel, out_string->str, -1, NULL, NULL);
-               g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+               g_io_channel_write_chars(channel, out_string->str, -1, nullptr, nullptr);
+               g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 
                g_string_free(out_string, TRUE);
                file_data_unref(fd);
@@ -1318,14 +1354,14 @@ static void gr_file_info(const gchar *UNUSED(text), GIOChannel *channel, gpointe
 
 static gchar *config_file_path(const gchar *param)
 {
-       gchar *path = NULL;
-       gchar *full_name = NULL;
+       gchar *path = nullptr;
+       gchar *full_name = nullptr;
 
        if (file_extension_match(param, ".xml"))
                {
                path = g_build_filename(get_window_layouts_dir(), param, NULL);
                }
-       else if (file_extension_match(param, NULL))
+       else if (file_extension_match(param, nullptr))
                {
                full_name = g_strconcat(param, ".xml", NULL);
                path = g_build_filename(get_window_layouts_dir(), full_name, NULL);
@@ -1334,7 +1370,7 @@ static gchar *config_file_path(const gchar *param)
        if (!isfile(path))
                {
                g_free(path);
-               path = NULL;
+               path = nullptr;
                }
 
        g_free(full_name);
@@ -1343,7 +1379,7 @@ static gchar *config_file_path(const gchar *param)
 
 static gboolean is_config_file(const gchar *param)
 {
-       gchar *name = NULL;
+       gchar *name = nullptr;
 
        name = config_file_path(param);
        if (name)
@@ -1354,7 +1390,7 @@ static gboolean is_config_file(const gchar *param)
        return FALSE;
 }
 
-static void gr_config_load(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_config_load(const gchar *text, GIOChannel *, gpointer)
 {
        gchar *filename = expand_tilde(text);
 
@@ -1375,13 +1411,13 @@ static void gr_config_load(const gchar *text, GIOChannel *UNUSED(channel), gpoin
        else
                {
                log_printf("remote sent filename that does not exist:\"%s\"\n", filename);
-               layout_set_path(NULL, homedir());
+               layout_set_path(nullptr, homedir());
                }
 
        g_free(filename);
 }
 
-static void gr_get_sidecars(const gchar *text, GIOChannel *channel, gpointer UNUSED(data))
+static void gr_get_sidecars(const gchar *text, GIOChannel *channel, gpointer)
 {
        gchar *filename = expand_tilde(text);
        FileData *fd = file_data_new_group(filename);
@@ -1389,35 +1425,35 @@ static void gr_get_sidecars(const gchar *text, GIOChannel *channel, gpointer UNU
        GList *work;
        if (fd->parent) fd = fd->parent;
 
-       g_io_channel_write_chars(channel, fd->path, -1, NULL, NULL);
-       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+       g_io_channel_write_chars(channel, fd->path, -1, nullptr, nullptr);
+       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 
        work = fd->sidecar_files;
 
        while (work)
                {
-               fd = work->data;
+               fd = static_cast<FileData *>(work->data);
                work = work->next;
-               g_io_channel_write_chars(channel, fd->path, -1, NULL, NULL);
-               g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+               g_io_channel_write_chars(channel, fd->path, -1, nullptr, nullptr);
+               g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
                }
        g_free(filename);
 }
 
-static void gr_get_destination(const gchar *text, GIOChannel *channel, gpointer UNUSED(data))
+static void gr_get_destination(const gchar *text, GIOChannel *channel, gpointer)
 {
        gchar *filename = expand_tilde(text);
        FileData *fd = file_data_new_group(filename);
 
        if (fd->change && fd->change->dest)
                {
-               g_io_channel_write_chars(channel, fd->change->dest, -1, NULL, NULL);
-               g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+               g_io_channel_write_chars(channel, fd->change->dest, -1, nullptr, nullptr);
+               g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
                }
        g_free(filename);
 }
 
-static void gr_file_view(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_file_view(const gchar *text, GIOChannel *, gpointer)
 {
        gchar *filename;
        gchar *tilde_filename = expand_tilde(text);
@@ -1429,20 +1465,20 @@ static void gr_file_view(const gchar *text, GIOChannel *UNUSED(channel), gpointe
        g_free(tilde_filename);
 }
 
-static void gr_list_clear(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer data)
+static void gr_list_clear(const gchar *, GIOChannel *, gpointer data)
 {
-       RemoteData *remote_data = data;
+       auto remote_data = static_cast<RemoteData *>(data);
 
-       remote_data->command_collection = NULL;
-       remote_data->file_list = NULL;
+       remote_data->command_collection = nullptr;
+       remote_data->file_list = nullptr;
        remote_data->single_dir = TRUE;
 }
 
-static void gr_list_add(const gchar *text, GIOChannel *UNUSED(channel), gpointer data)
+static void gr_list_add(const gchar *text, GIOChannel *, gpointer data)
 {
-       RemoteData *remote_data = data;
+       auto remote_data = static_cast<RemoteData *>(data);
        gboolean is_new = TRUE;
-       gchar *path = NULL;
+       gchar *path = nullptr;
        FileData *fd;
        FileData *first;
 
@@ -1464,7 +1500,7 @@ static void gr_list_add(const gchar *text, GIOChannel *UNUSED(channel), gpointer
                while (work && remote_data->single_dir)
                        {
                        gchar *dirname;
-                       dirname = g_path_get_dirname(((FileData *)work->data)->path);
+                       dirname = g_path_get_dirname((static_cast<FileData *>(work->data))->path);
                        if (!path)
                                {
                                path = g_strdup(dirname);
@@ -1495,7 +1531,7 @@ static void gr_list_add(const gchar *text, GIOChannel *UNUSED(channel), gpointer
 
        layout_select_list(lw_id, remote_data->file_list);
        layout_refresh(lw_id);
-       first = (FileData *)(g_list_first(vf_selection_get_list(lw_id->vf))->data);
+       first = static_cast<FileData *>(g_list_first(vf_selection_get_list(lw_id->vf))->data);
        layout_set_fd(lw_id, first);
 
                CollectionData *cd;
@@ -1503,7 +1539,7 @@ static void gr_list_add(const gchar *text, GIOChannel *UNUSED(channel), gpointer
 
        if (!remote_data->command_collection && !remote_data->single_dir)
                {
-               cw = collection_window_new(NULL);
+               cw = collection_window_new(nullptr);
                cd = cw->cd;
 
                collection_path_changed(cd);
@@ -1525,7 +1561,74 @@ static void gr_list_add(const gchar *text, GIOChannel *UNUSED(channel), gpointer
                }
 }
 
-static void gr_raise(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_action(const gchar *text, GIOChannel *, gpointer)
+{
+       GtkAction *action;
+
+       if (!layout_valid(&lw_id))
+               {
+               return;
+               }
+
+       if (g_strstr_len(text, -1, ".desktop") != nullptr)
+               {
+               file_util_start_editor_from_filelist(text, layout_selection_list(lw_id), layout_get_path(lw_id), lw_id->window);
+               }
+       else
+               {
+               action = gtk_action_group_get_action(lw_id->action_group, text);
+               if (action)
+                       {
+                       gtk_action_activate(action);
+                       }
+               else
+                       {
+                       log_printf("Action %s unknown", text);
+                       }
+               }
+}
+
+static void gr_action_list(const gchar *, GIOChannel *channel, gpointer)
+{
+       ActionItem *action_item;
+       gint max_length = 0;
+       GList *list = nullptr;
+       GString *out_string = g_string_new(nullptr);
+
+       if (!layout_valid(&lw_id))
+               {
+               return;
+               }
+
+       list = get_action_items();
+
+       /* Get the length required for padding */
+       for (GList *work = list; work; work = work->next)
+               {
+               action_item = static_cast<ActionItem *>(work->data);
+               const auto length = g_utf8_strlen(action_item->name, -1);
+               max_length = MAX(length, max_length);
+               }
+
+       /* Pad the action names to the same column for readable output */
+       for (GList *work = list; work; work = work->next)
+               {
+               action_item = static_cast<ActionItem *>(work->data);
+
+               g_string_append_printf(out_string, "%-*s", max_length + 4, action_item->name);
+               out_string = g_string_append(out_string, action_item->label);
+               out_string = g_string_append(out_string, "\n");
+               }
+
+       action_items_free(list);
+
+       g_io_channel_write_chars(channel, out_string->str, -1, nullptr, nullptr);
+       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
+
+       g_string_free(out_string, TRUE);
+}
+
+static void gr_raise(const gchar *, GIOChannel *, gpointer)
 {
        if (layout_valid(&lw_id))
                {
@@ -1533,9 +1636,9 @@ static void gr_raise(const gchar *UNUSED(text), GIOChannel *UNUSED(channel), gpo
                }
 }
 
-static void gr_pwd(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUSED(data))
+static void gr_pwd(const gchar *text, GIOChannel *, gpointer)
 {
-       LayoutWindow *lw = NULL;
+       LayoutWindow *lw = nullptr;
 
        layout_valid(&lw);
 
@@ -1544,16 +1647,16 @@ static void gr_pwd(const gchar *text, GIOChannel *UNUSED(channel), gpointer UNUS
        lw_id = lw;
 }
 
-static void gr_print0(const gchar *UNUSED(text), GIOChannel *channel, gpointer UNUSED(data))
+static void gr_print0(const gchar *, GIOChannel *channel, gpointer)
 {
-       g_io_channel_write_chars(channel, "print0", -1, NULL, NULL);
-       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+       g_io_channel_write_chars(channel, "print0", -1, nullptr, nullptr);
+       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 }
 
 #ifdef HAVE_LUA
-static void gr_lua(const gchar *text, GIOChannel *channel, gpointer UNUSED(data))
+static void gr_lua(const gchar *text, GIOChannel *channel, gpointer)
 {
-       gchar *result = NULL;
+       gchar *result = nullptr;
        gchar **lua_command;
 
        lua_command = g_strsplit(text, ",", 2);
@@ -1561,45 +1664,46 @@ static void gr_lua(const gchar *text, GIOChannel *channel, gpointer UNUSED(data)
        if (lua_command[0] && lua_command[1])
                {
                FileData *fd = file_data_new_group(lua_command[0]);
-               result = g_strdup(lua_callvalue(fd, lua_command[1], NULL));
+               result = g_strdup(lua_callvalue(fd, lua_command[1], nullptr));
                if (result)
                        {
-                       g_io_channel_write_chars(channel, result, -1, NULL, NULL);
+                       g_io_channel_write_chars(channel, result, -1, nullptr, nullptr);
                        }
                else
                        {
-                       g_io_channel_write_chars(channel, N_("lua error: no data"), -1, NULL, NULL);
+                       g_io_channel_write_chars(channel, N_("lua error: no data"), -1, nullptr, nullptr);
                        }
                }
        else
                {
-               g_io_channel_write_chars(channel, N_("lua error: no data"), -1, NULL, NULL);
+               g_io_channel_write_chars(channel, N_("lua error: no data"), -1, nullptr, nullptr);
                }
 
-       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, NULL, NULL);
+       g_io_channel_write_chars(channel, "<gq_end_of_command>", -1, nullptr, nullptr);
 
        g_strfreev(lua_command);
        g_free(result);
 }
 #endif
 
-typedef struct _RemoteCommandEntry RemoteCommandEntry;
-struct _RemoteCommandEntry {
-       gchar *opt_s;
-       gchar *opt_l;
+struct RemoteCommandEntry {
+       const gchar *opt_s;
+       const gchar *opt_l;
        void (*func)(const gchar *text, GIOChannel *channel, gpointer data);
        gboolean needs_extra;
        gboolean prefer_command_line;
-       gchar *parameter;
-       gchar *description;
+       const gchar *parameter;
+       const gchar *description;
 };
 
 static RemoteCommandEntry remote_commands[] = {
        /* short, long                  callback,               extra, prefer, parameter, description */
-       { "-b", "--back",               gr_image_prev,          FALSE, FALSE, NULL, N_("previous image") },
-       { NULL, "--close-window",       gr_close_window,        FALSE, FALSE, NULL, N_("close window") },
-       { NULL, "--config-load:",       gr_config_load,         TRUE,  FALSE, N_("<FILE>|layout ID"), N_("load configuration from FILE") },
-       { "-cm","--cache-metadata",      gr_cache_metadata,               FALSE, FALSE, NULL, N_("clean the metadata cache") },
+       { nullptr, "--action:",          gr_action,            TRUE,  FALSE, N_("<ACTION>"), N_("execute keyboard action (See Help/Reference/Remote Keyboard Actions)") },
+       { nullptr, "--action-list",          gr_action_list,    FALSE,  FALSE, nullptr, N_("list available keyboard actions (some are redundant)") },
+       { "-b", "--back",               gr_image_prev,          FALSE, FALSE, nullptr, N_("previous image") },
+       { nullptr, "--close-window",       gr_close_window,        FALSE, FALSE, nullptr, N_("close window") },
+       { nullptr, "--config-load:",       gr_config_load,         TRUE,  FALSE, N_("<FILE>|layout ID"), N_("load configuration from FILE") },
+       { "-cm","--cache-metadata",      gr_cache_metadata,               FALSE, FALSE, nullptr, N_("clean the metadata cache") },
        { "-cr:", "--cache-render:",    gr_cache_render,        TRUE, FALSE, N_("<folder>  "), N_(" render thumbnails") },
        { "-crr:", "--cache-render-recurse:", gr_cache_render_recurse, TRUE, FALSE, N_("<folder> "), N_("render thumbnails recursively") },
        { "-crs:", "--cache-render-shared:", gr_cache_render_standard, TRUE, FALSE, N_("<folder> "), N_(" render thumbnails (see Help)") },
@@ -1607,53 +1711,53 @@ static RemoteCommandEntry remote_commands[] = {
        { "-cs:", "--cache-shared:",    gr_cache_shared,        TRUE, FALSE, N_("clear|clean"), N_("clear or clean shared thumbnail cache") },
        { "-ct:", "--cache-thumbs:",    gr_cache_thumb,         TRUE, FALSE, N_("clear|clean"), N_("clear or clean thumbnail cache") },
        { "-d", "--delay=",             gr_slideshow_delay,     TRUE,  FALSE, N_("<[H:][M:][N][.M]>"), N_("set slide show delay to Hrs Mins N.M seconds") },
-       { NULL, "--first",              gr_image_first,         FALSE, FALSE, NULL, N_("first image") },
-       { "-f", "--fullscreen",         gr_fullscreen_toggle,   FALSE, TRUE,  NULL, N_("toggle full screen") },
-       { NULL, "--file:",              gr_file_load,           TRUE,  FALSE, N_("<FILE>|<URL>"), N_("open FILE or URL, bring Geeqie window to the top") },
-       { NULL, "file:",                gr_file_load,           TRUE,  FALSE, N_("<FILE>|<URL>"), N_("open FILE or URL, bring Geeqie window to the top") },
-       { NULL, "--File:",              gr_file_load_no_raise,  TRUE,  FALSE, N_("<FILE>|<URL>"), N_("open FILE or URL, do not bring Geeqie window to the top") },
-       { NULL, "File:",                gr_file_load_no_raise,  TRUE,  FALSE, N_("<FILE>|<URL>"), N_("open FILE or URL, do not bring Geeqie window to the top") },
-       { "-fs","--fullscreen-start",   gr_fullscreen_start,    FALSE, FALSE, NULL, N_("start full screen") },
-       { "-fS","--fullscreen-stop",    gr_fullscreen_stop,     FALSE, FALSE, NULL, N_("stop full screen") },
-       { NULL, "--geometry=",          gr_geometry,            TRUE, FALSE, N_("<GEOMETRY>"), N_("set window geometry") },
-       { NULL, "--get-collection:",    gr_collection,          TRUE,  FALSE, N_("<COLLECTION>"), N_("get collection content") },
-       { NULL, "--get-collection-list", gr_collection_list,    FALSE, FALSE, NULL, N_("get collection list") },
-       { NULL, "--get-destination:",   gr_get_destination,     TRUE,  FALSE, N_("<FILE>"), N_("get destination path of FILE (See Plugins Configuration)") },
-       { NULL, "--get-file-info",      gr_file_info,           FALSE, FALSE, NULL, N_("get file info") },
-       { NULL, "--get-filelist:",      gr_filelist,            TRUE,  FALSE, N_("[<FOLDER>]"), N_("get list of files and class") },
-       { NULL, "--get-filelist-recurse:", gr_filelist_recurse, TRUE,  FALSE, N_("[<FOLDER>]"), N_("get list of files and class recursive") },
-       { NULL, "--get-rectangle",      gr_rectangle,           FALSE, FALSE, NULL, N_("get rectangle co-ordinates") },
-       { NULL, "--get-render-intent",  gr_render_intent,       FALSE, FALSE, NULL, N_("get render intent") },
-       { NULL, "--get-selection",      gr_get_selection,       FALSE, FALSE, NULL, N_("get list of selected files") },
-       { NULL, "--get-sidecars:",      gr_get_sidecars,        TRUE,  FALSE, N_("<FILE>"), N_("get list of sidecars of FILE") },
-       { NULL, "--id:",                gr_lw_id,               TRUE, FALSE, N_("<ID>"), N_("window id for following commands") },
-       { NULL, "--last",               gr_image_last,          FALSE, FALSE, NULL, N_("last image") },
-       { NULL, "--list-add:",          gr_list_add,            TRUE,  FALSE, N_("<FILE>"), N_("add FILE to command line collection list") },
-       { NULL, "--list-clear",         gr_list_clear,          FALSE, FALSE, NULL, N_("clear command line collection list") },
+       { nullptr, "--first",              gr_image_first,         FALSE, FALSE, nullptr, N_("first image") },
+       { "-f", "--fullscreen",         gr_fullscreen_toggle,   FALSE, TRUE,  nullptr, N_("toggle full screen") },
+       { nullptr, "--file:",              gr_file_load,           TRUE,  FALSE, N_("<FILE>|<URL>"), N_("open FILE or URL, bring Geeqie window to the top") },
+       { nullptr, "file:",                gr_file_load,           TRUE,  FALSE, N_("<FILE>|<URL>"), N_("open FILE or URL, bring Geeqie window to the top") },
+       { nullptr, "--File:",              gr_file_load_no_raise,  TRUE,  FALSE, N_("<FILE>|<URL>"), N_("open FILE or URL, do not bring Geeqie window to the top") },
+       { nullptr, "File:",                gr_file_load_no_raise,  TRUE,  FALSE, N_("<FILE>|<URL>"), N_("open FILE or URL, do not bring Geeqie window to the top") },
+       { "-fs","--fullscreen-start",   gr_fullscreen_start,    FALSE, FALSE, nullptr, N_("start full screen") },
+       { "-fS","--fullscreen-stop",    gr_fullscreen_stop,     FALSE, FALSE, nullptr, N_("stop full screen") },
+       { nullptr, "--geometry=",          gr_geometry,            TRUE, FALSE, N_("<GEOMETRY>"), N_("set window geometry") },
+       { nullptr, "--get-collection:",    gr_collection,          TRUE,  FALSE, N_("<COLLECTION>"), N_("get collection content") },
+       { nullptr, "--get-collection-list", gr_collection_list,    FALSE, FALSE, nullptr, N_("get collection list") },
+       { nullptr, "--get-destination:",        gr_get_destination,     TRUE,  FALSE, N_("<FILE>"), N_("get destination path of FILE (See Plugins Configuration)") },
+       { nullptr, "--get-file-info",      gr_file_info,           FALSE, FALSE, nullptr, N_("get file info") },
+       { nullptr, "--get-filelist:",      gr_filelist,            TRUE,  FALSE, N_("[<FOLDER>]"), N_("get list of files and class") },
+       { nullptr, "--get-filelist-recurse:", gr_filelist_recurse, TRUE,  FALSE, N_("[<FOLDER>]"), N_("get list of files and class recursive") },
+       { nullptr, "--get-rectangle",      gr_rectangle,           FALSE, FALSE, nullptr, N_("get rectangle co-ordinates") },
+       { nullptr, "--get-render-intent",  gr_render_intent,       FALSE, FALSE, nullptr, N_("get render intent") },
+       { nullptr, "--get-selection",      gr_get_selection,       FALSE, FALSE, nullptr, N_("get list of selected files") },
+       { nullptr, "--get-sidecars:",      gr_get_sidecars,        TRUE,  FALSE, N_("<FILE>"), N_("get list of sidecars of FILE") },
+       { nullptr, "--id:",                gr_lw_id,               TRUE, FALSE, N_("<ID>"), N_("window id for following commands") },
+       { nullptr, "--last",               gr_image_last,          FALSE, FALSE, nullptr, N_("last image") },
+       { nullptr, "--list-add:",          gr_list_add,            TRUE,  FALSE, N_("<FILE>"), N_("add FILE to command line collection list") },
+       { nullptr, "--list-clear",         gr_list_clear,          FALSE, FALSE, nullptr, N_("clear command line collection list") },
 #ifdef HAVE_LUA
-       { NULL, "--lua:",               gr_lua,                 TRUE, FALSE, N_("<FILE>,<lua script>"), N_("run lua script on FILE") },
+       { nullptr, "--lua:",               gr_lua,                 TRUE, FALSE, N_("<FILE>,<lua script>"), N_("run lua script on FILE") },
 #endif
-       { NULL, "--new-window",         gr_new_window,          FALSE, FALSE, NULL, N_("new window") },
-       { "-n", "--next",               gr_image_next,          FALSE, FALSE, NULL, N_("next image") },
-       { NULL, "--pixel-info",         gr_pixel_info,          FALSE, FALSE, NULL, N_("print pixel info of mouse pointer on current image") },
-       { NULL, "--print0",             gr_print0,              TRUE, FALSE, NULL, N_("terminate returned data with null character instead of newline") },
-       { NULL, "--PWD:",               gr_pwd,                 TRUE, FALSE, N_("<PWD>"), N_("use PWD as working directory for following commands") },
-       { "-q", "--quit",               gr_quit,                FALSE, FALSE, NULL, N_("quit") },
-       { NULL, "--raise",              gr_raise,               FALSE, FALSE, NULL, N_("bring the Geeqie window to the top") },
-       { NULL, "raise",                gr_raise,               FALSE, FALSE, NULL, N_("bring the Geeqie window to the top") },
-       { NULL, "--selection-add:",     gr_selection_add,       TRUE,  FALSE, N_("[<FILE>]"), N_("adds the current file (or the specified file) to the current selection") },
-       { NULL, "--selection-clear",    gr_selection_clear,     FALSE, FALSE, NULL, N_("clears the current selection") },
-       { NULL, "--selection-remove:",  gr_selection_remove,    TRUE,  FALSE, N_("[<FILE>]"), N_("removes the current file (or the specified file) from the current selection") },
-       { "-s", "--slideshow",          gr_slideshow_toggle,    FALSE, TRUE,  NULL, N_("toggle slide show") },
-       { NULL, "--slideshow-recurse:", gr_slideshow_start_rec, TRUE,  FALSE, N_("<FOLDER>"), N_("start recursive slide show in FOLDER") },
-       { "-ss","--slideshow-start",    gr_slideshow_start,     FALSE, FALSE, NULL, N_("start slide show") },
-       { "-sS","--slideshow-stop",     gr_slideshow_stop,      FALSE, FALSE, NULL, N_("stop slide show") },
-       { NULL, "--tell",               gr_file_tell,           FALSE, FALSE, NULL, N_("print filename [and Collection] of current image") },
-       { "+t", "--tools-show",         gr_tools_show,          FALSE, TRUE,  NULL, N_("show tools") },
-       { "-t", "--tools-hide",         gr_tools_hide,          FALSE, TRUE,  NULL, N_("hide tools") },
-       { NULL, "--view:",              gr_file_view,           TRUE,  FALSE, N_("<FILE>"), N_("open FILE in new window") },
-       { NULL, "view:",                gr_file_view,           TRUE,  FALSE, N_("<FILE>"), N_("open FILE in new window") },
-       { NULL, NULL, NULL, FALSE, FALSE, NULL, NULL }
+       { nullptr, "--new-window",         gr_new_window,          FALSE, FALSE, nullptr, N_("new window") },
+       { "-n", "--next",               gr_image_next,          FALSE, FALSE, nullptr, N_("next image") },
+       { nullptr, "--pixel-info",         gr_pixel_info,          FALSE, FALSE, nullptr, N_("print pixel info of mouse pointer on current image") },
+       { nullptr, "--print0",             gr_print0,              TRUE, FALSE, nullptr, N_("terminate returned data with null character instead of newline") },
+       { nullptr, "--PWD:",               gr_pwd,                 TRUE, FALSE, N_("<PWD>"), N_("use PWD as working directory for following commands") },
+       { "-q", "--quit",               gr_quit,                FALSE, FALSE, nullptr, N_("quit") },
+       { nullptr, "--raise",              gr_raise,               FALSE, FALSE, nullptr, N_("bring the Geeqie window to the top") },
+       { nullptr, "raise",                gr_raise,               FALSE, FALSE, nullptr, N_("bring the Geeqie window to the top") },
+       { nullptr, "--selection-add:",     gr_selection_add,       TRUE,  FALSE, N_("[<FILE>]"), N_("adds the current file (or the specified file) to the current selection") },
+       { nullptr, "--selection-clear",    gr_selection_clear,     FALSE, FALSE, nullptr, N_("clears the current selection") },
+       { nullptr, "--selection-remove:",  gr_selection_remove,    TRUE,  FALSE, N_("[<FILE>]"), N_("removes the current file (or the specified file) from the current selection") },
+       { "-s", "--slideshow",          gr_slideshow_toggle,    FALSE, TRUE,  nullptr, N_("toggle slide show") },
+       { nullptr, "--slideshow-recurse:", gr_slideshow_start_rec, TRUE,  FALSE, N_("<FOLDER>"), N_("start recursive slide show in FOLDER") },
+       { "-ss","--slideshow-start",    gr_slideshow_start,     FALSE, FALSE, nullptr, N_("start slide show") },
+       { "-sS","--slideshow-stop",     gr_slideshow_stop,      FALSE, FALSE, nullptr, N_("stop slide show") },
+       { nullptr, "--tell",               gr_file_tell,           FALSE, FALSE, nullptr, N_("print filename [and Collection] of current image") },
+       { "+t", "--tools-show",         gr_tools_show,          FALSE, TRUE,  nullptr, N_("show tools") },
+       { "-t", "--tools-hide",         gr_tools_hide,          FALSE, TRUE,  nullptr, N_("hide tools") },
+       { nullptr, "--view:",              gr_file_view,           TRUE,  FALSE, N_("<FILE>"), N_("open FILE in new window") },
+       { nullptr, "view:",                gr_file_view,           TRUE,  FALSE, N_("<FILE>"), N_("open FILE in new window") },
+       { nullptr, nullptr, nullptr, FALSE, FALSE, nullptr, nullptr }
 };
 
 static RemoteCommandEntry *remote_command_find(const gchar *text, const gchar **offset)
@@ -1662,7 +1766,7 @@ static RemoteCommandEntry *remote_command_find(const gchar *text, const gchar **
        gint i;
 
        i = 0;
-       while (!match && remote_commands[i].func != NULL)
+       while (!match && remote_commands[i].func != nullptr)
                {
                if (remote_commands[i].needs_extra)
                        {
@@ -1672,7 +1776,8 @@ static RemoteCommandEntry *remote_command_find(const gchar *text, const gchar **
                                if (offset) *offset = text + strlen(remote_commands[i].opt_s);
                                return &remote_commands[i];
                                }
-                       else if (remote_commands[i].opt_l &&
+
+                       if (remote_commands[i].opt_l &&
                                 strncmp(remote_commands[i].opt_l, text, strlen(remote_commands[i].opt_l)) == 0)
                                {
                                if (offset) *offset = text + strlen(remote_commands[i].opt_l);
@@ -1692,10 +1797,10 @@ static RemoteCommandEntry *remote_command_find(const gchar *text, const gchar **
                i++;
                }
 
-       return NULL;
+       return nullptr;
 }
 
-static void remote_cb(RemoteConnection *UNUSED(rc), const gchar *text, GIOChannel *channel, gpointer data)
+static void remote_cb(RemoteConnection *, const gchar *text, GIOChannel *channel, gpointer data)
 {
        RemoteCommandEntry *entry;
        const gchar *offset;
@@ -1711,7 +1816,7 @@ static void remote_cb(RemoteConnection *UNUSED(rc), const gchar *text, GIOChanne
                }
 }
 
-void remote_help(void)
+void remote_help()
 {
        gint i;
        gchar *s_opt_param;
@@ -1720,16 +1825,17 @@ void remote_help(void)
        print_term(FALSE, _("Remote command list:\n"));
 
        i = 0;
-       while (remote_commands[i].func != NULL)
+       while (remote_commands[i].func != nullptr)
                {
                if (remote_commands[i].description)
                        {
                        s_opt_param = g_strdup(remote_commands[i].opt_s  ? remote_commands[i].opt_s : "" );
                        l_opt_param = g_strconcat(remote_commands[i].opt_l, remote_commands[i].parameter, NULL);
-                       printf_term(FALSE, "  %-4s %-40s%-s\n",
-                                       s_opt_param,
-                                       l_opt_param,
-                                       _(remote_commands[i].description));
+
+                       if (g_str_has_prefix(l_opt_param, "--"))
+                               {
+                               printf_term(FALSE, "  %-4s %-40s%-s\n", s_opt_param, l_opt_param, _(remote_commands[i].description));
+                               }
                        g_free(s_opt_param);
                        g_free(l_opt_param);
                        }
@@ -1747,7 +1853,7 @@ GList *remote_build_list(GList *list, gint argc, gchar *argv[], GList **errors)
                {
                RemoteCommandEntry *entry;
 
-               entry = remote_command_find(argv[i], NULL);
+               entry = remote_command_find(argv[i], nullptr);
                if (entry)
                        {
                        list = g_list_append(list, argv[i]);
@@ -1795,10 +1901,10 @@ void remote_control(const gchar *arg_exec, GList *remote_list, const gchar *path
                        gchar *text;
                        RemoteCommandEntry *entry;
 
-                       text = work->data;
+                       text = static_cast<gchar *>(work->data);
                        work = work->next;
 
-                       entry = remote_command_find(text, NULL);
+                       entry = remote_command_find(text, nullptr);
                        if (entry)
                                {
                                /* If Geeqie is not running, stop the --new-window command opening a second window */
@@ -1853,10 +1959,10 @@ void remote_control(const gchar *arg_exec, GList *remote_list, const gchar *path
                        gchar *text;
                        RemoteCommandEntry *entry;
 
-                       text = work->data;
+                       text = static_cast<gchar *>(work->data);
                        work = work->next;
 
-                       entry = remote_command_find(text, NULL);
+                       entry = remote_command_find(text, nullptr);
                        if (entry &&
                            entry->opt_l &&
                            strcmp(entry->opt_l, "file:") == 0) use_path = FALSE;
@@ -1906,7 +2012,7 @@ void remote_control(const gchar *arg_exec, GList *remote_list, const gchar *path
                        const gchar *name;
                        gchar *text;
 
-                       name = work->data;
+                       name = static_cast<const gchar *>(work->data);
                        work = work->next;
 
                        text = g_strdup_printf("file:%s", name);
@@ -1932,7 +2038,7 @@ void remote_control(const gchar *arg_exec, GList *remote_list, const gchar *path
 RemoteConnection *remote_server_init(gchar *path, CollectionData *command_collection)
 {
        RemoteConnection *remote_connection = remote_server_open(path);
-       RemoteData *remote_data = g_new(RemoteData, 1);
+       auto remote_data = g_new(RemoteData, 1);
 
        remote_data->command_collection = command_collection;