Locker
/* $Id$ */
/* Copyright (c) 2011-2018 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Desktop Locker */
/* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY ITS AUTHORS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <gdk/gdkx.h>
#include <System.h>
#include "Locker/demo.h"
#include "../../config.h"
#ifndef PREFIX
# define PREFIX "/usr/local"
#endif
/* XScreensaver */
/* private */
/* types */
typedef struct _XScreensaverWindow
{
GdkWindow * window;
GPid pid;
} XScreensaverWindow;
typedef struct _LockerDemo
{
LockerDemoHelper * helper;
/* windows */
XScreensaverWindow * windows;
size_t windows_cnt;
} XScreensaver;
/* prototypes */
/* plug-in */
static XScreensaver * _xscreensaver_init(LockerDemoHelper * helper);
static void _xscreensaver_destroy(XScreensaver * xscreensaver);
static int _xscreensaver_add(XScreensaver * xscreensaver, GdkWindow * window);
static void _xscreensaver_remove(XScreensaver * xscreensaver,
GdkWindow * window);
static void _xscreensaver_start(XScreensaver * xscreensaver);
static void _xscreensaver_stop(XScreensaver * xscreensaver);
/* public */
/* variables */
/* plug-in */
LockerDemoDefinition plugin =
{
"XScreensaver",
"xscreensaver",
NULL,
_xscreensaver_init,
_xscreensaver_destroy,
NULL,
_xscreensaver_add,
_xscreensaver_remove,
_xscreensaver_start,
_xscreensaver_stop,
NULL
};
/* private */
/* functions */
/* plug-in */
/* xscreensaver_init */
static XScreensaver * _xscreensaver_init(LockerDemoHelper * helper)
{
XScreensaver * xscreensaver;
if((xscreensaver = object_new(sizeof(*xscreensaver))) == NULL)
return NULL;
xscreensaver->helper = helper;
xscreensaver->windows = NULL;
xscreensaver->windows_cnt = 0;
return xscreensaver;
}
/* xscreensaver_destroy */
static void _xscreensaver_destroy(XScreensaver * xscreensaver)
{
size_t i;
/* kill the remaining children */
for(i = 0; i < xscreensaver->windows_cnt; i++)
if(xscreensaver->windows[i].pid > 0)
kill(xscreensaver->windows[i].pid, SIGTERM);
free(xscreensaver->windows);
object_delete(xscreensaver);
}
/* xscreensaver_add */
static XScreensaverWindow * _add_allocate(XScreensaver * xscreensaver);
static int _xscreensaver_add(XScreensaver * xscreensaver, GdkWindow * window)
{
int ret = 0;
LockerDemoHelper * helper = xscreensaver->helper;
XScreensaverWindow * w;
unsigned long id = GDK_WINDOW_XID(window);
GError * error = NULL;
char * argv[] = { NULL, "-window-id", NULL, NULL };
char const * p;
char buf[16];
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() %u\n", __func__, id);
#endif
if((w = _add_allocate(xscreensaver)) == NULL)
return -1; /* XXX report error */
if((p = helper->config_get(helper->locker, "xscreensaver",
"xscreensaver")) != NULL)
argv[0] = strdup(p);
else
argv[0] = strdup(PREFIX "/libexec/xscreensaver/bsod");
snprintf(buf, sizeof(buf), "%lu", id);
argv[2] = buf;
if(argv[0] == NULL)
return -helper->error(NULL, strerror(errno), 1);
if(g_spawn_async(NULL, argv, NULL, 0, NULL, NULL, &w->pid, &error)
!= TRUE)
{
ret = -helper->error(NULL, error->message, 1);
g_error_free(error);
}
w->window = window;
return ret;
}
static XScreensaverWindow * _add_allocate(XScreensaver * xscreensaver)
{
XScreensaverWindow * w;
size_t i;
/* look for a free window */
for(i = 0; i < xscreensaver->windows_cnt; i++)
if(xscreensaver->windows[i].window == NULL)
return &xscreensaver->windows[i];
/* allocate a window */
i = xscreensaver->windows_cnt + 1;
if((w = realloc(xscreensaver->windows, sizeof(*w) * i)) == NULL)
return NULL;
xscreensaver->windows = w;
w = &xscreensaver->windows[xscreensaver->windows_cnt++];
w->window = NULL;
w->pid = -1;
return w;
}
/* xscreensaver_remove */
static void _xscreensaver_remove(XScreensaver * xscreensaver,
GdkWindow * window)
{
size_t i;
XScreensaverWindow * w;
for(i = 0; i < xscreensaver->windows_cnt; i++)
if(xscreensaver->windows[i].window == window)
{
w = &xscreensaver->windows[i];
w->window = NULL;
kill(w->pid, SIGTERM);
w->pid = -1;
return;
}
/* FIXME free some memory */
}
/* xscreensaver_start */
static void _xscreensaver_start(XScreensaver * xscreensaver)
{
size_t i;
for(i = 0; i < xscreensaver->windows_cnt; i++)
if(xscreensaver->windows[i].pid > 0)
kill(xscreensaver->windows[i].pid, SIGCONT);
}
/* xscreensaver_stop */
static void _xscreensaver_stop(XScreensaver * xscreensaver)
{
size_t i;
for(i = 0; i < xscreensaver->windows_cnt; i++)
if(xscreensaver->windows[i].pid > 0)
kill(xscreensaver->windows[i].pid, SIGSTOP);
}