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

void displayUI()
{
	GtkWidget* mainWindow = gtk_window_new(GTK_WINDOW_TOPLEVEL);

	gtk_window_set_default_size(GTK_WINDOW(mainWindow), 400, 300);
	gtk_window_set_title(GTK_WINDOW(mainWindow), "GTK Simple Example");
	gtk_window_set_position(GTK_WINDOW(mainWindow), GTK_WIN_POS_CENTER_ALWAYS);

	gtk_signal_connect(GTK_OBJECT(mainWindow), "destroy", G_CALLBACK(gtk_main_quit), NULL);

	gtk_widget_show_all(mainWindow);
}

int main(int argc, char *argv[])
{
	gtk_init(&argc, &argv);

	displayUI();

	gtk_main();

	return EXIT_SUCCESS;
}

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

int main(int argc, char *argv[])
{
	char *buffer1 = (char *)calloc(5, sizeof(char));
	char *buffer2 = (char *)calloc(15, sizeof(char));
	char *tmp;
	
	strcpy(buffer2, "ls -a --color");
	strcpy(buffer1, argv[1]);

	// Indirizzi di memoria...
	printf("%p <-- buffer1\n", buffer1);
	printf("%p <-- buffer2\n", buffer2);
	printf("\n\n");

	// Stampa indirizzi...
	printf("Start code....\n");
	tmp=buffer1;
	while(tmp<buffer2+15)
	{
		printf("%p: %c (0x%x)\n", tmp, *tmp, *(unsigned int *)tmp);
		tmp++;
	}

	printf("\n");
	system(buffer2);
	return 0;
}

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

#include <unistd.h>

#include <X11/Xlib.h>
#include <X11/Xutil.h>

void mouseClick(int button)
{
	Display *display = XOpenDisplay(NULL);

	XEvent event;
	
	if(display == NULL)
	{
		fprintf(stderr, "Errore nell'apertura del Display !!!\n");
		exit(EXIT_FAILURE);
	}
	
	memset(&event, 0x00, sizeof(event));
	
	event.type = ButtonPress;
	event.xbutton.button = button;
	event.xbutton.same_screen = True;
	
	XQueryPointer(display, RootWindow(display, DefaultScreen(display)), &event.xbutton.root, &event.xbutton.window, &event.xbutton.x_root, &event.xbutton.y_root, &event.xbutton.x, &event.xbutton.y, &event.xbutton.state);
	
	event.xbutton.subwindow = event.xbutton.window;
	
	while(event.xbutton.subwindow)
	{
		event.xbutton.window = event.xbutton.subwindow;
		
		XQueryPointer(display, event.xbutton.window, &event.xbutton.root, &event.xbutton.subwindow, &event.xbutton.x_root, &event.xbutton.y_root, &event.xbutton.x, &event.xbutton.y, &event.xbutton.state);
	}
	
	if(XSendEvent(display, PointerWindow, True, 0xfff, &event) == 0) fprintf(stderr, "Errore nell'invio dell'evento !!!\n");
	
	XFlush(display);
	
	usleep(100000);
	
	event.type = ButtonRelease;
	event.xbutton.state = 0x100;
	
	if(XSendEvent(display, PointerWindow, True, 0xfff, &event) == 0) fprintf(stderr, "Errore nell'invio dell'evento !!!\n");
	
	XFlush(display);
	
	XCloseDisplay(display);
}

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

#include <X11/Xlib.h>
#include <X11/Xutil.h>

void mouseMove(int x, int y)
{
	Display *displayMain = XOpenDisplay(NULL);

	if(displayMain == NULL)
	{
		fprintf(stderr, "Errore nell'apertura del Display !!!\n");
		exit(EXIT_FAILURE);
	}

	XWarpPointer(displayMain, None, None, 0, 0, 0, 0, x, y);

	XCloseDisplay(displayMain);
}

/*
 *
 * Esempio che scansiona una cartella stampando a video i file in essa
 * contenuti.
 */

#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>

int main(int argc, char *argv[])
{
	DIR *dir;
	struct dirent *drent;

	if(argc < 2)
	{
		fprintf(stderr, "%s <directory>\n", argv[0]);
		return EXIT_FAILURE;
	}

	if((dir = opendir(argv[1])) == NULL)
	{
		fprintf(stderr, "Errore opendir()\n");
		return EXIT_FAILURE;
	}

	while((drent = readdir(dir)) != NULL)
	{
		fprintf(stdout, "--> %s\n", drent->d_name);
	}
	
	if(closedir(dir) < 0)
	{
		fprintf(stderr, "Errore closedir()\n");
		return EXIT_FAILURE;
	}
}

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

int main(int argc, char *argv[])
{
	// Funziona sui terminali compatibili ansi
	
	fprintf(stdout, "\033[2J"); // Cancella lo schermo
	fprintf(stdout, "\033[1;1H"); // Posiziona il cursore sulla linea colonna 1

	return EXIT_SUCCESS;
}

#include <stdio.h>
#include <unistd.h>

#include <sys/types.h>
#include <sys/stat.h>

int main(int argc, char *argv[])
{
	/*
	 * Funzione che mi crea un demone
	 */
	
	int pid;
	
	// create - fork 1
	if(fork()) return 0;

	// it separates the son from the father
	chdir("/");
	setsid();
	umask(0);

	// create - fork 2
	pid = fork();

	if(pid)
	{
		printf("Daemon: %d\n", pid);
		return 0;
	}
	
	/****** Codice da eseguire ********/	
	FILE *f;

	f=fopen("/tmp/coa.log", "w");
	
	while(1)
	{
		fprintf(f, "ciao\n");
		fflush(f);
		sleep(2);
	}
	/**********************************/
}