/* Create new application tracker item */
static XfdashboardApplicationTrackerItem* _xfdashboard_application_tracker_item_new(GAppInfo *inAppInfo,
XfdashboardWindowTrackerWindow *inWindow)
{
XfdashboardApplicationTrackerItem *item;
g_return_val_if_fail(G_IS_APP_INFO(inAppInfo), NULL);
g_return_val_if_fail(XFDASHBOARD_IS_WINDOW_TRACKER_WINDOW(inWindow), NULL);
/* Create new application item and set up */
item=g_new0(XfdashboardApplicationTrackerItem, 1);
item->pid=xfdashboard_window_tracker_window_get_pid(inWindow);
item->appInfo=g_object_ref(inAppInfo);
item->desktopID=g_strdup(g_app_info_get_id(inAppInfo));
item->windows=g_list_prepend(item->windows, inWindow);
/* Return newly created application tracker item */
return(item);
}
/* Get desktop ID from process' environment which owns window.
* Callee is responsible to free result with g_object_unref().
*/
static GAppInfo* _xfdashboard_application_tracker_get_desktop_id_from_environment(XfdashboardApplicationTracker *self,
XfdashboardWindowTrackerWindow *inWindow)
{
XfdashboardApplicationTrackerPrivate *priv;
GAppInfo *foundAppInfo;
gint windowPID;
gchar *procEnvFile;
gchar *envContent;
gsize envLength;
GError *error;
gchar *iter;
const gchar *gioLaunchedPID;
const gchar *gioLaunchedDesktopFile;
g_return_val_if_fail(XFDASHBOARD_IS_APPLICATION_TRACKER(self), NULL);
g_return_val_if_fail(XFDASHBOARD_IS_WINDOW_TRACKER_WINDOW(inWindow), NULL);
priv=self->priv;
foundAppInfo=NULL;
error=NULL;
/* Get process ID running this window */
windowPID=xfdashboard_window_tracker_window_get_pid(inWindow);
if(windowPID<=0)
{
g_debug("Could not get PID for window '%s' of a running application to parse environment variables",
xfdashboard_window_tracker_window_get_title(inWindow));
return(NULL);
}
/* Open enviroment variables of process.
* This is the initial set of environment variables set when process was spawned.
* But that is ok because the environment variables we lookup are set
* at launch time and do not change.
*/
envContent=NULL;
envLength=0;
procEnvFile=g_strdup_printf("/proc/%d/environ", windowPID);
if(!g_file_get_contents(procEnvFile, &envContent, &envLength, &error))
{
g_debug("Could read in enviroment varibles for PID %d of window '%s' at %s: %s",
windowPID,
xfdashboard_window_tracker_window_get_title(inWindow),
procEnvFile,
error ? error->message : _("Unknown error"));
/* Release allocated resources */
if(error) g_error_free(error);
if(procEnvFile) g_free(procEnvFile);
if(envContent) g_free(envContent);
/* Return NULL result */
return(NULL);
}
g_debug("Enviroment set at %s is %lu bytes long for window '%s'",
procEnvFile,
envLength,
xfdashboard_window_tracker_window_get_title(inWindow));
/* Iterate through enviroment variables and lookup GIO_LAUNCHED_DESKTOP_FILE
* and GIO_LAUNCHED_DESKTOP_FILE_PID.
*/
gioLaunchedPID=NULL;
gioLaunchedDesktopFile=NULL;
iter=envContent;
while(envLength>0)
{
gsize len;
/* Skip NULL-termination */
if(!*iter)
{
envLength--;
iter++;
continue;
}
/* Check current iterated enviroment variable matches a requested one */
if(g_str_has_prefix(iter, "GIO_LAUNCHED_DESKTOP_FILE="))
{
/* Each enviroment variable should be listed only once
* otherwise is an error.
*/
if(gioLaunchedDesktopFile)
{
g_debug("Could parse in enviroment varibles for PID %d of window '%s' at %s because GIO_LAUNCHED_DESKTOP_FILE exists more than once",
windowPID,
xfdashboard_window_tracker_window_get_title(inWindow),
procEnvFile);
/* Release allocated resources */
if(foundAppInfo) g_object_unref(foundAppInfo);
if(procEnvFile) g_free(procEnvFile);
if(envContent) g_free(envContent);
/* Return NULL result */
return(NULL);
}
/* Remember value of environment variable */
gioLaunchedDesktopFile=iter;
}
else if(g_str_has_prefix(iter, "GIO_LAUNCHED_DESKTOP_FILE_PID="))
{
/* Each enviroment variable should be listed only once
* otherwise is an error.
*/
if(gioLaunchedPID)
{
g_debug("Could parse in enviroment varibles for PID %d of window '%s' at %s because GIO_LAUNCHED_DESKTOP_FILE_PID exists more than once",
windowPID,
xfdashboard_window_tracker_window_get_title(inWindow),
procEnvFile);
/* Release allocated resources */
if(foundAppInfo) g_object_unref(foundAppInfo);
if(procEnvFile) g_free(procEnvFile);
if(envContent) g_free(envContent);
/* Return NULL result */
return(NULL);
}
/* Remember value of environment variable */
gioLaunchedPID=iter;
}
/* If all requested environment variable has been found stop iterating */
if(gioLaunchedPID && gioLaunchedDesktopFile) break;
/* Continue with next environment variable */
len=strlen(iter);
iter+=len;
envLength-=len;
}
/* If all requested environment variable has been found then check if
* GIO_LAUNCHED_DESKTOP_FILE_PID matches window owner's process ID.
*/
if(gioLaunchedPID && gioLaunchedDesktopFile)
{
/* Move pointer of environment variables to value */
while(*gioLaunchedPID && *gioLaunchedPID!='=') gioLaunchedPID++;
while(*gioLaunchedDesktopFile && *gioLaunchedDesktopFile!='=') gioLaunchedDesktopFile++;
/* Check if pointers points to value assignment character */
if(*gioLaunchedPID=='=' &&
*gioLaunchedDesktopFile=='=')
{
gint checkPID;
/* Move pointer one byte further where value begins really */
gioLaunchedPID++;
gioLaunchedDesktopFile++;
/* Check if PID of enviroment variable matches window owner's
* process ID.
*/
checkPID=atoi(gioLaunchedPID);
if(checkPID==windowPID)
{
/* Lookup application from full path */
foundAppInfo=xfdashboard_application_database_lookup_desktop_id(priv->appDatabase, gioLaunchedDesktopFile);
if(!foundAppInfo)
{
/* Lookup application from basename of path */
gioLaunchedDesktopFile=g_strrstr(gioLaunchedDesktopFile, G_DIR_SEPARATOR_S);
if(gioLaunchedDesktopFile)
{
gioLaunchedDesktopFile++;
foundAppInfo=xfdashboard_application_database_lookup_desktop_id(priv->appDatabase, gioLaunchedDesktopFile);
}
}
}
else
{
g_debug("PID %d of environment variable does not match window PID %d for '%s'",
checkPID,
windowPID,
xfdashboard_window_tracker_window_get_title(inWindow));
}
}
}
/* Release allocated resources */
if(procEnvFile) g_free(procEnvFile);
if(envContent) g_free(envContent);
/* Return found application info */
g_debug("Resolved enviroment variables of window '%s' to desktop ID '%s'",
xfdashboard_window_tracker_window_get_title(inWindow),
foundAppInfo ? g_app_info_get_id(foundAppInfo) : "<nil>");
return(foundAppInfo);
}
/* Get desktop ID from process' environment which owns window.
* Callee is responsible to free result with g_object_unref().
*/
static GAppInfo* _xfdashboard_application_tracker_get_desktop_id_from_environment(XfdashboardApplicationTracker *self,
XfdashboardWindowTrackerWindow *inWindow)
{
XfdashboardApplicationTrackerPrivate *priv;
GAppInfo *foundAppInfo;
gint windowPID;
GHashTable *environments;
gchar *value;
gint checkPID;
g_return_val_if_fail(XFDASHBOARD_IS_APPLICATION_TRACKER(self), NULL);
g_return_val_if_fail(XFDASHBOARD_IS_WINDOW_TRACKER_WINDOW(inWindow), NULL);
priv=self->priv;
foundAppInfo=NULL;
/* Get process ID running this window */
windowPID=xfdashboard_window_tracker_window_get_pid(inWindow);
if(windowPID<=0)
{
g_debug("Could not get PID for window '%s' of a running application to parse environment variables",
xfdashboard_window_tracker_window_get_title(inWindow));
/* Return NULL result */
return(NULL);
}
/* Get hash-table with environment variables found for window's PID */
environments=_xfdashboard_application_tracker_get_environment_from_pid(windowPID);
if(!environments)
{
g_debug("Could not get environments for PID %d of windows '%s'",
windowPID,
xfdashboard_window_tracker_window_get_title(inWindow));
/* Return NULL result */
return(NULL);
}
/* Check that environment variable GIO_LAUNCHED_DESKTOP_FILE_PID exists.
* Also check that the PID in value matches the requested window's PID
* as the process may inherit the environments of its parent process
* but then this one is not the initial process for this application.
*/
if(!g_hash_table_lookup_extended(environments, "GIO_LAUNCHED_DESKTOP_FILE_PID", NULL, (gpointer)&value))
{
g_debug("Missing 'GIO_LAUNCHED_DESKTOP_FILE_PID' in environment variables for PID %d of windows '%s'",
windowPID,
xfdashboard_window_tracker_window_get_title(inWindow));
/* Release allocated resources */
if(environments) g_hash_table_destroy(environments);
/* Return NULL result */
return(NULL);
}
checkPID=atoi(value);
if(checkPID!=windowPID)
{
g_debug("PID %d of environment variables does not match requested window PID %d for '%s'",
checkPID,
windowPID,
xfdashboard_window_tracker_window_get_title(inWindow));
/* Release allocated resources */
if(environments) g_hash_table_destroy(environments);
/* Return NULL result */
return(NULL);
}
/* Check that environment variable GIO_LAUNCHED_DESKTOP_FILE exists and
* lookup application from full path as set in environment's value.
*/
if(!g_hash_table_lookup_extended(environments, "GIO_LAUNCHED_DESKTOP_FILE", NULL, (gpointer)&value))
{
g_debug("Missing 'GIO_LAUNCHED_DESKTOP_FILE' in environment variables for PID %d of windows '%s'",
windowPID,
xfdashboard_window_tracker_window_get_title(inWindow));
/* Release allocated resources */
if(environments) g_hash_table_destroy(environments);
/* Return NULL result */
return(NULL);
}
foundAppInfo=xfdashboard_application_database_lookup_desktop_id(priv->appDatabase, value);
if(!foundAppInfo)
{
/* Lookup application from basename of path */
value=g_strrstr(value, G_DIR_SEPARATOR_S);
if(value)
{
value++;
foundAppInfo=xfdashboard_application_database_lookup_desktop_id(priv->appDatabase, value);
}
}
/* Release allocated resources */
if(environments) g_hash_table_destroy(environments);
/* Return found application info which may be NULL if not found in
* application database.
*/
g_debug("Resolved enviroment variables of window '%s' to desktop ID '%s'",
xfdashboard_window_tracker_window_get_title(inWindow),
foundAppInfo ? g_app_info_get_id(foundAppInfo) : "<nil>");
return(foundAppInfo);
}
