c - GTK+ system(3) 线程调用

Question

我用 GTK+-2.0 开发了一个简单的应用程序。我的问题是如何在不卡住程序的情况下运行 bash 脚本(例如使用 system(3))？我试图实现一个线程系统，但没有成功。

这是我的代码片段，我尽量简化了。问候

int main(int argc,
    char * argv[])
{
    GtkWidget *button;


    /* init threads */  
    g_thread_init(NULL);
    gdk_threads_init();
    gtk_init(&argc,&argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    ...

    button = gtk_button_new_with_label("Format");
    g_signal_connect(button,"clicked",G_CALLBACK(callback),(gpointer)"button 1");
    gtk_table_attach_defaults (GTK_TABLE (table), button, 0, 1, 0, 1);
    gtk_widget_show(button);


        gdk_threads_enter();
    gtk_main();
    gdk_threads_leave();

    return 0;

}

/* Our callback.
* The data passed to this function is printed to stdout */
static void callback( GtkWidget *widget,
                  gpointer   data )
{
    int sTemp=0;
    GThread   *thread;
        GError    *error = NULL;
        g_print ("Hello again - %s was pressed\n", (char *) data);
        sTemp=ChecckIfFileExits("/dev/mmcblk0");
        if(sTemp)
        {
        gtk_label_set_text(GTK_LABEL(label),"Formatting");
        thread = g_thread_create( PFormatThrad, (gpointer)widget,
                          FALSE, &error );
        if( ! thread )
        {
            g_print( "Error: %s\n", error->message );

        }

    }
    else
    {
        g_print ("SD/MMC not found\n");
    }
}


static gpointer
PFormatThrad( gpointer data )
{

        sleep( 3 );

        gdk_threads_enter();

        system("./mkcard.txt /dev/mmcblk0");
    gtk_widget_set_sensitive(selectImageButton,TRUE);
    gtk_label_set_text(GTK_LABEL(label),"Format tamamlandı\nİmajı Seçin");
        gdk_threads_leave();

    return( NULL );
}    

Answer 1

不要调用 fork()直接。

在 GTK+ 应用程序中，最好使用 glib 的 process spawning API:s .例如 <a href="http://developer.gnome.org/glib/stable/glib-Spawning-Processes.html#g-spawn-async-with-pipes" rel="noreferrer noopener nofollow">g_spawn_async_with_pipes()</a>如果您想读取子进程的输出，该函数非常方便。