/*
Example running a command into a GtkTextView by Micah Carrick
Written for www.gtkforums.com
Compile using:
gcc -Wall -g main.c -o example `pkg-config --cflags --libs gtk+-2.0 libglade-2.0` 
*/

#include <gtk/gtk.h>
#include <glade/glade.h>

/* structure to hold references to our widgets */
typedef struct
{       
        GtkWidget               *entry;
        GtkWidget               *textview;
} MyWidgets;
               
/* call back function for when the button is pressed */
static void
on_execute_button_clicked (GtkWidget* widget, gpointer user_data)
{
        MyWidgets               *widgets;
        gchar                   *output;       
        const gchar             *command;       
        GError                  *error = NULL; 
        GtkTextBuffer           *buffer;
             
        widgets = (MyWidgets *)user_data;
        command = gtk_entry_get_text (GTK_ENTRY (widgets->entry));
       
        /* execute command */     
        g_spawn_command_line_sync (command, &output, NULL, NULL, &error);
       
        if (error != NULL)
        {
                GtkWidget *dialog;
               
                /* create an error dialog containing the error message */
                dialog = gtk_message_dialog_new (NULL, GTK_DIALOG_DESTROY_WITH_PARENT,
                                                GTK_MESSAGE_ERROR,
                                                GTK_BUTTONS_OK,
                                                error->message);
                gtk_window_set_title (GTK_WINDOW (dialog), "Error");
               
                /* run the dialog */
                gtk_dialog_run (GTK_DIALOG (dialog));
               
                /* clean up memory used by dialog and error */
                gtk_widget_destroy (dialog);   
                g_error_free(error);
               
                return;
        }
       
        /* get the text buffer */
        buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (widgets->textview));
       
        /* set the text in the buffer to the output */
        gtk_text_buffer_set_text (buffer, output, -1);
       
        /* free the output string */
        g_free (output);   
}

int
main (int argc, char *argv[])
{
       
        GtkWidget               *window;
        GladeXML                *gxml;
        MyWidgets               *widgets;
        PangoFontDescription    *font_desc;
       
        widgets = g_slice_new (MyWidgets);
       
        /* initialize the GTK+ library */
        gtk_init (&argc, &argv);

        /* build GladeXML object from the glade XML file */
        gxml = glade_xml_new ("example.glade", NULL, NULL);

        /* get widgets from GladeXML object */
        window = glade_xml_get_widget (gxml, "window");
        widgets->entry = glade_xml_get_widget (gxml, "execute_entry");
        widgets->textview = glade_xml_get_widget (gxml, "output_textview");
       
        /* call gtk_main_quit() when the window's "x" is clicked */
        glade_xml_signal_connect (gxml, "gtk_main_quit",
            G_CALLBACK (gtk_main_quit));

        /*
        Call on_button_clicked() when execute_button is clicked, passing the
        MyWidget struct to the function as the user_data
        */
        glade_xml_signal_connect_data (gxml, "on_execute_button_clicked",
            G_CALLBACK (on_execute_button_clicked), widgets);

        /* free GladeXML object */
        g_object_unref (G_OBJECT (gxml));
             
        /* use a fixed width font on the text view so the output looks proper */
       
        font_desc = pango_font_description_from_string ("monospace 10");
        gtk_widget_modify_font (widgets->textview, font_desc);     
        pango_font_description_free (font_desc);     
             
        /* show the main window */
        gtk_widget_show (window);

        gtk_main ();
       
        return 0;     
}

<property name="response_id">0</property>

#include <stdio.h>
#include <stdlib.h>
#include <glib.h>

int main(int argc, char** argv)
{
    gchar* std_out = NULL;
    gchar* std_err = NULL;
    gint exit_status;
    GError* error = NULL;
   
    gchar* cmd = "'C:\\Archivos de programa\\nasm-2.05.01-dos\\nasm.exe'";
    g_spawn_command_line_sync(cmd, &std_out, &std_err, &exit_status, &error);
   
    if(error)
    {
        g_print("error: %s\n\n", error->message);
        g_error_free(error);
        system("pause");
        exit(EXIT_FAILURE);
    }
   
    if(std_out)
    {
        g_free(std_out);
    }
   
    if(std_err)
    {
        g_free(std_err);
    }

    system("pause");
        return EXIT_SUCCESS;
}

gchar* cmd = "\"C:\\Archivos\ de\ programa\\nasm-2.05.01-dos\\nasm.exe\"";

gchar* cmd = "'C:\\nasm.exe'";
gchar* cmd = "C:\\nasm.exe";
gchar* cmd = "C:/nasm.exe";
gchar* cmd = "'C:/nasm.exe'";
gchar* cmd = "nasm"; /* nasm is in my PATH variable */