gkrellm-multiping-mirror/multiping.c

/*____________________________________________________________________________

        gkrellm multiping plugin

        Copyright (C) 2010 Jindrich Makovicka

        This program is free software; you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation; either version 2 of the License, or
        (at your option) any later version.

        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with this program; if not, Write to the Free Software
        Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
____________________________________________________________________________*/

#include <stdio.h>
#include <string.h>
#include <gkrellm2/gkrellm.h>
#include <sys/types.h>
#include <sys/wait.h>

#include "decal_multiping_status.xpm"

#define         CONFIG_NAME     "Multiping"
#define         STYLE_NAME      "multiping"

#define COMMAND HELPERDIR"/pinger"

static GkrellmMonitor *monitor;
static GkrellmPanel *panel;

static gint style_id;

static FILE *pinger_pipe = NULL;
static pid_t pinger_pid;

static gboolean delete_list;
static gboolean list_modified;

static GtkWidget *plugin_vbox;
static GtkWidget *label_entry;
static GtkWidget *url_entry;
static GtkWidget *updatefreq_spin;
static GtkWidget *show_trip_checkbutton;
static GtkWidget *dynamic_checkbutton;

static GtkTreeView *multiping_treeview;
static GtkTreeRowReference *row_reference;
static GtkTreeSelection         *selection;

static GkrellmPiximage *decal_status_image;
static GdkPixmap *status_pixmap;
static GdkBitmap *status_mask;

static gint vspacing, hspacing, time_xoffset;

static gint helper_err = 0;

typedef struct _host_data {
    GString *name, *ip, *percentage, *sent_str, *recv_str, *msg, *shortmsg;
    gint updatefreq;
    GkrellmDecal *name_text, *msg_text, *decal_pix;
    gboolean show_trip, dynamic;
} host_data;

static GList *hosts;

enum {
    LABEL_COLUMN,
    HOST_COLUMN,
    TRIP_COLUMN,
    DYNAMIC_COLUMN,
    INTERVAL_COLUMN,
    DUMMY_COLUMN,
    N_COLUMNS
};

static host_data *host_malloc()
{
    host_data *h = (host_data *) g_malloc(sizeof(host_data));
    h->name_text = NULL;
    h->msg_text = NULL;
    h->decal_pix = NULL;
    h->name = g_string_new(NULL);
    h->ip = g_string_new(NULL);
    h->percentage = g_string_new(NULL);
    h->sent_str = g_string_new(NULL);
    h->recv_str = g_string_new(NULL);
    h->msg = g_string_new(NULL);
    h->shortmsg = g_string_new("wait");
    h->updatefreq = 60;
    h->show_trip = 0;
    h->dynamic = 0;
    return h;
}

static void host_free(host_data * h)
{
    if (h->name_text) {
        gkrellm_destroy_decal(h->name_text);
    }
    if (h->msg_text) {
        gkrellm_destroy_decal(h->msg_text);
    }
    if (h->decal_pix) {
        gkrellm_destroy_decal(h->decal_pix);
    }
    g_string_free(h->name, TRUE);
    g_string_free(h->ip, TRUE);
    g_string_free(h->percentage, TRUE);
    g_string_free(h->sent_str, TRUE);
    g_string_free(h->recv_str, TRUE);
    g_string_free(h->msg, TRUE);
    g_string_free(h->shortmsg, TRUE);
    g_free(h);
}

static void strip_nl(gchar *buf)
{
    if (buf[strlen(buf) - 1] == '\n')
        buf[strlen(buf) - 1] = 0;
}


static void host_read_pipe(host_data * h)
{
    gchar buf[512];

    char* res = fgets(buf, 512, pinger_pipe);
    if (res == 0) {
        helper_err = 1;
        return;
    }
    strip_nl(buf);
    g_string_assign(h->percentage, buf);
    fgets(buf, 512, pinger_pipe);
    strip_nl(buf);
    g_string_assign(h->sent_str, buf);
    fgets(buf, 512, pinger_pipe);
    strip_nl(buf);
    g_string_assign(h->recv_str, buf);
    fgets(buf, 512, pinger_pipe);
    strip_nl(buf);
    g_string_assign(h->msg, buf);
    fgets(buf, 512, pinger_pipe);
    strip_nl(buf);
    g_string_assign(h->shortmsg, buf);
}

static void kill_pinger()
{
    if (pinger_pipe) {
        kill(pinger_pid, SIGTERM);
        waitpid(pinger_pid, NULL, 0);
        fclose(pinger_pipe);
        pinger_pipe = NULL;
    }
}

static void launch_pipe()
{
    GString *s = g_string_new(COMMAND);
    gint i;
    GList *list;
    host_data *h;
    pid_t pid;
    gint mypipe[2];

    for (i = 0, list = hosts; list; list = list->next, i++) {
        char freq[5];
        h = (host_data *) list->data;
        g_string_append(s, " ");
        g_string_append(s, h->ip->str);
        g_string_append(s, " ");
        sprintf(freq, "%3d", h->updatefreq);
        g_string_append(s, freq);
        g_string_append(s, " ");
        g_string_append(s, h->dynamic ? "1" : "0");
    }

    if (pipe(mypipe)) {
        fprintf(stderr, "Pipe failed.\n");
        return;
    }

    pid = fork();
    if (pid == 0) {
        /* This is the child process.  Execute the shell command. */
        close(mypipe[0]);
        dup2(mypipe[1], 1);
        execl("/bin/sh", "/bin/sh", "-c", s->str, NULL);
        _exit(EXIT_FAILURE);
    } else if (pid < 0) {
        /* The fork failed.  Report failure.  */
        fprintf(stderr, "failed to fork\n");
    } else {
        /* This is the parent process. Prepare the pipe stream. */
        close(mypipe[1]);
        pinger_pipe = fdopen(mypipe[0], "r");
        pinger_pid = pid;
    }

    g_string_free(s, TRUE);
}

/*
static void
host_append_info(host_data *h, GString *str)
{
  GString *s = g_string_new(NULL);

  g_string_sprintf(s, "%s: %s, %s\n",
                   h->name->str, h->percentage->str, h->msg->str);
  g_string_append(str, s->str);

  g_string_free(s, TRUE);
}
*/

static void host_draw_name(host_data * h)
{
    gkrellm_draw_decal_text(panel, h->name_text, h->name->str, -1);
}

static void host_draw_msg(host_data * h)
{
    gint n, p;

    if (h->show_trip) {
        gkrellm_draw_decal_text(panel, h->msg_text, h->shortmsg->str, -1);
    }
    n = sscanf(h->percentage->str, "%d", &p);
    if (n != 1 || p == 0) {
        gkrellm_draw_decal_pixmap(panel, h->decal_pix, 0);
    } else if (p < 100) {
        gkrellm_draw_decal_pixmap(panel, h->decal_pix, 2);
    } else {
        gkrellm_draw_decal_pixmap(panel, h->decal_pix, 1);
    }
}

static GList *append_host(GList * list, gchar * name, gchar * ip, gboolean show_trip, gboolean dynamic, gint updatefreq)
{
    host_data *h = host_malloc();
    g_string_assign(h->name, name);
    g_string_assign(h->ip, ip);
    h->show_trip = show_trip;
    h->dynamic = dynamic;
    h->updatefreq = updatefreq;
    return g_list_append(list, h);
}

static gint
display_host(host_data * h, GkrellmStyle * style, GkrellmTextstyle * ts,
             GkrellmTextstyle * ts_alt, gint y)
{
    if (h->show_trip) {
        h->msg_text =
            gkrellm_create_decal_text(panel, "999", ts_alt, style, 0, y, 0);

        h->msg_text->x = gkrellm_chart_width() - h->msg_text->w + time_xoffset;
    }

    h->decal_pix =
        gkrellm_create_decal_pixmap(panel, status_pixmap, status_mask, 3,
                                    style, -1, y);
    h->name_text =
        gkrellm_create_decal_text(panel, "Ay", ts, style,
                                  h->decal_pix->x+h->decal_pix->w+hspacing, y, -1);

    if (h->name_text->h < h->decal_pix->h) {
        h->name_text->y += (h->decal_pix->h-h->name_text->h)/2;
        if (h->show_trip) {
            h->msg_text->y = h->name_text->y;
        }
        return h->decal_pix->y + h->decal_pix->h + vspacing;
    } else {
        h->decal_pix->y += (h->name_text->h-h->decal_pix->h)/2;
        return h->name_text->y + h->name_text->h + vspacing;
    }
}

static gint panel_click_event(GtkWidget * widget, GdkEventButton * ev)
{
    if (ev->button == 3)
        gkrellm_open_config_window(monitor);

    return 1;
}

static gint panel_expose_event(GtkWidget * widget, GdkEventExpose * ev)
{
    gdk_draw_pixmap(widget->window,
                    widget->style->fg_gc[GTK_WIDGET_STATE(widget)],
                    panel->pixmap, ev->area.x, ev->area.y, ev->area.x,
                    ev->area.y, ev->area.width, ev->area.height);
    return FALSE;
}


static void update_plugin()
{
    fd_set fds;
    struct timeval tv;
    gint ret;
    GString *str = g_string_new(NULL);

    FD_ZERO(&fds);
    FD_SET(fileno(pinger_pipe), &fds);
    tv.tv_sec = 0;
    tv.tv_usec = 0;
    ret = select(fileno(pinger_pipe) + 1, &fds, 0, 0, &tv);

    if (ret) {
        g_list_foreach(hosts, (GFunc) host_read_pipe, NULL);
        g_list_foreach(hosts, (GFunc) host_draw_msg, NULL);
        gkrellm_draw_panel_layers(panel);
    }

    if (helper_err) {
        kill_pinger();
        launch_pipe();
        helper_err = 0;
    }

    /*
       if (GK.minute_tick && tooltip) {
       //    if (tooltip->tip_window == NULL || !GTK_WIDGET_VISIBLE(tooltip->tip_window)) {
       g_list_foreach(hosts, (GFunc)host_append_info, str);
       gtk_tooltips_set_tip(tooltip, panel->drawing_area, str->str, NULL);
       gtk_tooltips_set_delay(tooltip, 750);
       gtk_tooltips_enable(tooltip);
       //    }
       }
     */
    g_string_free(str, TRUE);
}

static void
setup_display(gboolean first_create)
{
    gshort i;
    gint y;
    GkrellmStyle *style;
    GkrellmTextstyle *ts, *ts_alt;
    GList *list;
    host_data *h;

    if (first_create) {
        panel = gkrellm_panel_new0();
    }

    style = gkrellm_panel_style(style_id);
    ts = gkrellm_meter_textstyle(style_id);
    ts_alt = gkrellm_meter_alt_textstyle(style_id);

    y = 3;
//    y = style->top_margin;

    for (i = 0, list = hosts; list; list = list->next, i++) {
        h = (host_data *) list->data;
        y = display_host(h, style, ts, ts_alt, y);
    }

    gkrellm_panel_configure(panel, NULL, style);
    gkrellm_panel_create(plugin_vbox, monitor, panel);

    if (first_create) {
        g_signal_connect(GTK_OBJECT(panel->drawing_area), "expose_event",
                         (GtkSignalFunc) panel_expose_event, NULL);
        g_signal_connect(GTK_OBJECT(panel->drawing_area),
                         "button_release_event",
                         (GtkSignalFunc) panel_click_event, NULL);
    }

    g_list_foreach(hosts, (GFunc) host_draw_name, NULL);
    g_list_foreach(hosts, (GFunc) host_draw_msg, NULL);

    gkrellm_draw_panel_layers(panel);
}

static void
create_plugin(GtkWidget * vbox, gint first_create)
{
    plugin_vbox = vbox;

    gkrellm_load_piximage("decal_multiping_status", decal_multiping_status_xpm,
                          &decal_status_image, STYLE_NAME);

    gkrellm_scale_piximage_to_pixmap(decal_status_image, &status_pixmap,
                                     &status_mask, 0, 0);

    if (!gkrellm_get_gkrellmrc_integer("multiping_vspacing", &vspacing))
        vspacing = 2;
    if (!gkrellm_get_gkrellmrc_integer("multiping_hspacing", &hspacing))
        hspacing = 2;
    if (!gkrellm_get_gkrellmrc_integer("multiping_time_xoffset", &time_xoffset))
        time_xoffset = 0;

    kill_pinger();
    launch_pipe();
    setup_display(first_create);
}


static void
change_row_reference(GtkTreeModel *model, GtkTreePath *path)
{
    gtk_tree_row_reference_free(row_reference);
    if (model && path)
        row_reference = gtk_tree_row_reference_new(model, path);
    else
        row_reference = NULL;
}


static void
reset_entries()
{
    gtk_entry_set_text(GTK_ENTRY(label_entry), "");
    gtk_entry_set_text(GTK_ENTRY(url_entry), "");
    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(show_trip_checkbutton), TRUE);
    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(dynamic_checkbutton), FALSE);
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(updatefreq_spin),60);

    change_row_reference(NULL, NULL);
    gtk_tree_selection_unselect_all(selection);
    return;
}


static host_data *
host_new_from_model(GtkTreeModel *model, GtkTreeIter *iter)
{
    gchar *label;
    gchar *host;
    host_data *h;

    h = host_malloc();
    gtk_tree_model_get(model, iter,
                       LABEL_COLUMN, &label,
                       HOST_COLUMN, &host,
                       TRIP_COLUMN, &h->show_trip,
                       DYNAMIC_COLUMN, &h->dynamic,
                       INTERVAL_COLUMN, &h->updatefreq,
                       -1);

    h->name = g_string_new(label);
    h->ip = g_string_new(host);

    return h;
}


static void
set_list_store_model_data(GtkListStore *store, GtkTreeIter *iter, host_data *h)
{
    gtk_list_store_set(store, iter,
                       LABEL_COLUMN, h->name->str,
                       HOST_COLUMN, h->ip->str,
                       TRIP_COLUMN, h->show_trip,
                       DYNAMIC_COLUMN, h->dynamic,
                       INTERVAL_COLUMN, h->updatefreq,
                       DUMMY_COLUMN, "",
                       -1);
}

static GtkTreeModel *
create_model(void)
{
    GtkListStore *store;
    GtkTreeIter iter;
    GList *list;
    host_data *h;

    store = gtk_list_store_new(N_COLUMNS,
                               G_TYPE_STRING, G_TYPE_STRING, G_TYPE_BOOLEAN, G_TYPE_BOOLEAN,
                               G_TYPE_INT, G_TYPE_STRING);
    for (list = hosts; list; list = list->next) {
        h = (host_data *) list->data;
        gtk_list_store_append(store, &iter);
        set_list_store_model_data(store, &iter, h);
    }
    return GTK_TREE_MODEL(store);
}


static void
cb_selected(GtkWidget * clist, gint row, gint column,
            GdkEventButton * bevent, gpointer data)
{
    GtkTreeIter iter;
    GtkTreeModel *model;
    GtkTreePath *path;
    host_data *h;

    if (!gtk_tree_selection_get_selected(selection, &model, &iter))
    {
        reset_entries();
        return;
    }
    path = gtk_tree_model_get_path(model, &iter);
    change_row_reference(model, path);
    gtk_tree_path_free(path);

    h = host_new_from_model(model, &iter);

    gtk_entry_set_text(GTK_ENTRY(label_entry), h->name->str);
    gtk_entry_set_text(GTK_ENTRY(url_entry), h->ip->str);
    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(show_trip_checkbutton), h->show_trip);
    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(dynamic_checkbutton), h->dynamic);
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(updatefreq_spin), h->updatefreq);

    host_free(h);

    return;
}

static void
cb_enter(GtkWidget * widget, gpointer data)
{
    GtkTreeModel *model;
    GtkTreePath *path = NULL;
    GtkTreeIter iter;
    host_data *h;

    gchar *buf[3];

    h = host_malloc();

    buf[0] = gkrellm_gtk_entry_get_text(&label_entry);
    buf[1] = gkrellm_gtk_entry_get_text(&url_entry);
    h->show_trip = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(show_trip_checkbutton));
    h->dynamic = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(dynamic_checkbutton));
    buf[2] = gkrellm_gtk_entry_get_text(&updatefreq_spin);

    if ((strlen(buf[0]) == 0) || (strlen(buf[1]) == 0)) {
        host_free(h);
        return;
    }

    h->name = g_string_new(buf[0]);
    h->ip = g_string_new(buf[1]);
    h->updatefreq = atoi(buf[2]);

    model = gtk_tree_view_get_model(multiping_treeview);
    if (row_reference)
    {
        path = gtk_tree_row_reference_get_path(row_reference);
        gtk_tree_model_get_iter(model, &iter, path);
    }
    else
    {
        gtk_list_store_append(GTK_LIST_STORE(model), &iter);
    }

    set_list_store_model_data(GTK_LIST_STORE(model), &iter, h);
    host_free(h);
    reset_entries();

    list_modified = TRUE;
}


static void
cb_delete(GtkWidget * widget, gpointer data)
{
    GtkTreeModel        *model;
    GtkTreePath                 *path;
    GtkTreeIter                 iter;

    if (!row_reference)
        return;
    model = gtk_tree_view_get_model(multiping_treeview);
    path = gtk_tree_row_reference_get_path(row_reference);
    gtk_tree_model_get_iter(model, &iter, path);
    gtk_list_store_remove(GTK_LIST_STORE(model), &iter);

    reset_entries();
    list_modified = TRUE;
}

static gboolean
cb_drag_end(GtkWidget *widget, GdkDragContext *context, gpointer data)
{
    reset_entries();
    list_modified = TRUE;
    return FALSE;
}


static gchar plugin_about_text[] =
    "GKrellM Multiping version " VERSION "\n\n\n"
    "Copyright (C) 2010 Jindrich Makovicka\n"
    "makovick@gmail.com\n"
    "Released under the GPL.\n";

static void create_plugin_config(GtkWidget * tab_vbox)
{
    GtkWidget *tabs;
    GtkWidget *vbox;
    GtkWidget *hbox;
    GtkWidget *label;
    GtkWidget *scrolled;
    GtkWidget *button;
    GtkAdjustment *spin_adjust;
    GtkWidget *info_label;

    GtkTreeModel *model;
    GtkCellRenderer *renderer;

    row_reference = NULL;
    list_modified = FALSE;

/* Make a couple of tabs */
    tabs = gtk_notebook_new();
    gtk_notebook_set_tab_pos(GTK_NOTEBOOK(tabs), GTK_POS_TOP);
    gtk_box_pack_start(GTK_BOX(tab_vbox), tabs, TRUE, TRUE, 0);

/* Sources tab */
    vbox = gkrellm_gtk_framed_notebook_page(tabs, "Hosts");

    hbox = gtk_hbox_new(FALSE, 0);
    gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, TRUE, 2);
    label = gtk_label_new("Label:");
    gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);
    gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, TRUE, 2);
    label_entry = gtk_entry_new();
    gtk_entry_set_max_length(GTK_ENTRY(label_entry), 25);
    gtk_widget_set_size_request(label_entry, 180, -1);
    gtk_box_pack_start(GTK_BOX(hbox), label_entry, FALSE, TRUE, 0);

    label = gtk_label_new("Hostname / IP:");
    gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);
    gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, TRUE, 2);
    url_entry = gtk_entry_new();
    gtk_entry_set_max_length(GTK_ENTRY(url_entry), 75);
    gtk_box_pack_start(GTK_BOX(hbox), url_entry, TRUE, TRUE, 2);

    hbox = gtk_hbox_new(FALSE, 0);
    gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, TRUE, 5);
    label = gtk_label_new("Ping interval:");
    gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);
    gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, TRUE, 2);
    spin_adjust = (GtkAdjustment *) gtk_adjustment_new(0,10,3600,1.0,0,0);
    updatefreq_spin = gtk_spin_button_new(spin_adjust,1.0,0);
    gtk_spin_button_set_value(GTK_SPIN_BUTTON(updatefreq_spin),60);
    gtk_box_pack_start(GTK_BOX(hbox), updatefreq_spin, FALSE, TRUE, 0);
    label = gtk_label_new("seconds");
    gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, TRUE, 2);
    show_trip_checkbutton = gtk_check_button_new_with_label("Display trip time");
    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(show_trip_checkbutton),TRUE);
    gtk_box_pack_start(GTK_BOX(hbox), show_trip_checkbutton, FALSE, TRUE, 0);
    dynamic_checkbutton = gtk_check_button_new_with_label("Dynamic DNS");
    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(dynamic_checkbutton),FALSE);
    gtk_box_pack_start(GTK_BOX(hbox), dynamic_checkbutton, FALSE, TRUE, 0);

    button = gtk_button_new_from_stock(GTK_STOCK_DELETE);
    g_signal_connect(GTK_OBJECT(button), "clicked",
                     (GtkSignalFunc) cb_delete, NULL);
    gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 0);

    button = gtk_button_new_from_stock(GTK_STOCK_ADD);;
    g_signal_connect(GTK_OBJECT(button), "clicked",
                     (GtkSignalFunc) cb_enter, NULL);
    gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 0);

    scrolled = gtk_scrolled_window_new(NULL, NULL);
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled),
                                   GTK_POLICY_AUTOMATIC,
                                   GTK_POLICY_AUTOMATIC);
    gtk_box_pack_start(GTK_BOX(vbox), scrolled, TRUE, TRUE, 0);

    /* Treeview */

    model = create_model();

    multiping_treeview = GTK_TREE_VIEW(gtk_tree_view_new_with_model(model));
    gtk_tree_view_set_rules_hint(multiping_treeview, TRUE);
    gtk_tree_view_set_reorderable(multiping_treeview, TRUE);
    g_signal_connect(G_OBJECT(multiping_treeview), "drag_end",
                     G_CALLBACK(cb_drag_end), NULL);

    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(multiping_treeview, -1, "Label",
                                                renderer,
                                                "text", LABEL_COLUMN, NULL);
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(multiping_treeview, -1, "Hostname / IP Address",
                                                renderer,
                                                "text", HOST_COLUMN, NULL);
    renderer = gtk_cell_renderer_toggle_new();
    gtk_tree_view_insert_column_with_attributes(multiping_treeview, -1, "Trip",
                                                renderer,
                                                "active", TRIP_COLUMN, NULL);

    renderer = gtk_cell_renderer_toggle_new();
    gtk_tree_view_insert_column_with_attributes(multiping_treeview, -1, "Dynamic",
                                                renderer,
                                                "active", DYNAMIC_COLUMN, NULL);

    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(multiping_treeview, -1, "Ping int.",
                                                renderer,
                                                "text", INTERVAL_COLUMN, NULL);

    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_insert_column_with_attributes(multiping_treeview, -1, "    ",
                                                renderer,
                                                "text", DUMMY_COLUMN, NULL);


    gtk_container_add(GTK_CONTAINER(scrolled), GTK_WIDGET(multiping_treeview));
    selection = gtk_tree_view_get_selection(multiping_treeview);
    gtk_tree_selection_set_mode(selection, GTK_SELECTION_SINGLE);
    g_signal_connect(G_OBJECT(selection), "changed",
                     G_CALLBACK(cb_selected), NULL);

/* About tab */
    info_label = gtk_label_new(plugin_about_text);
    label = gtk_label_new("About");
    gtk_notebook_append_page(GTK_NOTEBOOK(tabs), info_label, label);
}

static void apply_plugin_config()
{
    if (list_modified) {
        GList *new_hosts;
        GtkTreeModel *model;
        GtkTreeIter iter;

        kill_pinger();

        new_hosts = NULL;

        model = gtk_tree_view_get_model(multiping_treeview);
        if (gtk_tree_model_get_iter_first(model, &iter)) {
            do {
                host_data *h;
                h = host_new_from_model(model, &iter);
                new_hosts = g_list_append(new_hosts, h);
            }
            while (gtk_tree_model_iter_next(model, &iter));
        }

        g_list_foreach(hosts, (GFunc) host_free, NULL);
        g_list_free(hosts);
        gkrellm_panel_destroy(panel);
        panel = gkrellm_panel_new0();

        hosts = new_hosts;
        setup_display(1);

        list_modified = FALSE;

        launch_pipe();
    }
}

static void save_plugin_config(FILE * f)
{
    gchar *label;
    gchar *pt;
    GList *list;
    host_data *h;

    for (list = hosts; list; list = list->next) {
        h = (host_data *) list->data;

        //when saving, we convert spaces in labels to underscores
        label = g_strdup(h->name->str);
        for (pt = label; *pt; pt++)
            if (*pt == ' ')
                *pt = '_';

        fprintf(f, "multiping host %s %s %d %d %d\n", label, h->ip->str, h->show_trip,
                h->updatefreq, h->dynamic);
        g_free(label);
    }
}

static void load_plugin_config(gchar * arg)
{
    gchar plugin_config[64];
    gchar item[256];
    gchar label[26];
    gchar ip[76];
    gint updatefreq;
    gchar *pt;
    gshort n;
    gboolean show_trip;
    gboolean dynamic;

    n = sscanf(arg, "%s %[^\n]", plugin_config, item);

    if (n == 2) {
        if (!strcmp(plugin_config, "host")) {
            if (delete_list) {
                g_list_foreach(hosts, (GFunc) host_free, NULL);
                g_list_free(hosts);
                delete_list = FALSE;
            }

            label[0] = '\0';
            ip[0] = '\0';
            show_trip = TRUE;
            dynamic = FALSE;
            sscanf(item, "%25s %75s %d %d %d", label, ip, &show_trip, &updatefreq, &dynamic);

            //when loading, we convert underscores in labels to spaces
            for (pt = label; *pt; pt++)
                if (*pt == '_')
                    *pt = ' ';

            hosts = append_host(hosts, label, ip, show_trip, dynamic, updatefreq);
        }
    }
}

/* The monitor structure tells GKrellM how to call the plugin routines.
*/
static GkrellmMonitor plugin_mon = {
    CONFIG_NAME,                /* Name, for config tab.    */
    0,                          /* Id,  0 if a plugin       */
    create_plugin,              /* The create function      */
    update_plugin,              /* The update function      */
    create_plugin_config,       /* The config tab create function   */
    apply_plugin_config,        /* Apply the config function        */

    save_plugin_config,                 /* Save user config */
    load_plugin_config,                 /* Load user config */
    "multiping",                /* config keyword                       */

    NULL,                       /* Undefined 2  */
    NULL,                       /* Undefined 1  */
    NULL,                       /* private              */

    MON_MAIL,                   /* Insert plugin before this monitor                    */

    NULL,                       /* Handle if a plugin, filled in by GKrellM     */
    NULL                        /* path if a plugin, filled in by GKrellM       */
};

GkrellmMonitor *gkrellm_init_plugin()
{
    list_modified = FALSE;
    delete_list = TRUE;
    style_id = gkrellm_add_meter_style(&plugin_mon, STYLE_NAME);
    monitor = &plugin_mon;
    return &plugin_mon;
}