remote

Plugin umo¿liwia zdalne sterowanie programem gg2.
remote nas³uchuje na gnie¼dzie lokalnym na datagramy.
Akceptuje tylko datagramy, które przenosz± ze sob± tzw. credentials. S³u¿±
one do identyfikacji klienta.

Obs³ugiwane komendy:
|======================================================================|
| komenda              | dzia³anie                                     |
|======================================================================|
| gui show             | pokazuje/ukrywa okienko GUI                   |
|----------------------------------------------------------------------|
| gui warn <tekst>     | wy¶wietla okienko GUI z ostrze¿eniem          |
|                      |  zawartym w <tekst>                           |
|----------------------------------------------------------------------|
| gui msg <tekst>      | wy¶wietla okienko GUI z wiadomo¶i±            |
|                      | zawart± w <tekst>                             |
|----------------------------------------------------------------------|
| gui notify <tekst>   | wy¶wietla okienko GUI z powiadomieniem        |
|                      | zawartym w <tekst>                            |
|----------------------------------------------------------------------|
| quit                 | koñczy dzia³anie programu gg2                 |
|----------------------------------------------------------------------|
| xosd show <tekst>    | wy¶wietla <tekst> za pomoc± xosd              |
|----------------------------------------------------------------------|
| remote get_icon      | ¿±da podania nazwy tematu i nazwy pliku,      |
|                      | w którym znajduje siê pixmapa okre¶laj±ca     |
|                      | aktualn± ikonkê dockletu. Je¶li temat to      |
|                      | bubble a plik online.png, to zwracane jest    |
|                      | "ok bubble/online.png" lub                    |
|                      | "err <wyja¶nienie>", je¶li wyst±pi³ b³±d      |
|                      | uniemo¿liwiaj±cy zwrócenie danych.            |
|----------------------------------------------------------------------|
| remote_get_icon_path | tak jak w "remote get_icon", z t± ró¿nic±, ¿e |
|                      | zwracana jest pe³na ¶cie¿ka do pliku z pixmap±|
|----------------------------------------------------------------------|

Przyk³adowy klient, który wysy³a komendy z linii poleceñ:

--cut-here--
#include <pwd.h>
#include <sys/un.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>

const char *pth_unix = ".gg2_remote";
char *sock_path;
int sck = -1;

struct sockaddr_un sun;

void client_init (void)
{
  struct passwd *pw;

  pw = getpwuid (getuid ());
  if (pw == NULL)
    return;

  /* tu by sie przydalo sprawdzanie poprawnosci pw->pw_dir */
  sock_path = malloc (strlen (pw->pw_dir) + 1 + strlen (pth_unix) + 1);
  if (!sock_path)
    abort ();
  strcpy (sock_path, pw->pw_dir);
  strcpy (sock_path + strlen (pw->pw_dir) + 1, pth_unix);
  sock_path[strlen (pw->pw_dir)] = '/';
  
  sck = socket (PF_UNIX, SOCK_DGRAM, 0);
  if (sck == -1)
    goto abort;

  sun.sun_family = AF_UNIX;
  bzero (&sun.sun_path, sizeof (sun.sun_path));
  strcpy (sun.sun_path, sock_path);

  return;

abort:
    printf ("%s\n", strerror (errno));
    if (sck != -1)
    {
      close (sck);
      sck = -1;
    }
  return;
}

int wyslij (char *text)
{
  struct msghdr msg;
  struct cmsghdr *cmsg;
  int text_len = strlen (text) + 1;
  char buf[CMSG_SPACE (sizeof (struct ucred))];
  struct ucred *pcred;
  struct iovec iov;

  msg.msg_control = buf;
  msg.msg_controllen = sizeof (buf);

  cmsg = CMSG_FIRSTHDR (&msg);
  cmsg->cmsg_level = SOL_SOCKET;
  cmsg->cmsg_type  = SCM_CREDENTIALS;
  cmsg->cmsg_len   = CMSG_LEN (sizeof (struct ucred));

  pcred = (struct ucred *) CMSG_DATA (cmsg);
  pcred->pid = getpid ();
  pcred->uid = getuid ();
  pcred->gid = getgid ();

  msg.msg_name    = &sun;
  msg.msg_namelen = sizeof (sun);

  iov.iov_base = text;
  iov.iov_len  = text_len;
  
  msg.msg_iov    = &iov;
  msg.msg_iovlen = 1;

  return sendmsg (sck, &msg, 0);
}

int main (int argc, char *argv[])
{
  char buf[512];

  client_init ();
  if (sck == -1)
    return -1;
  if (argc < 2)
    return 0;

  printf ("%s -> %d\n", argv[1], wyslij (argv[1]));
  printf ("%s\n", strerror (errno));
  
  close (sck);
  free (sock_path);
  
  return 0;
}
--cut-here--


$Id: README.remote,v 1.1.1.1 2003/03/20 10:37:01 krzyzak Exp $