static void ChildPrintToFile(String display_name,
XPContext pcontext,
FILE *file,
char *file_name,
int pipe,
String application_name,
String application_class)
{
FileDescRec *file_desc;
XtAppContext app_context;
int argc = 0;
String argv[] = { NULL };
Display *display;
file_desc = (FileDescRec *) XtMalloc(sizeof(FileDescRec));
file_desc->file_name = XtNewString(file_name);
file_desc->file = file;
file_desc->pipe = pipe;
app_context = XtCreateApplicationContext();
if ((display = XtOpenDisplay(app_context, display_name,
application_name, application_class,
NULL, 0, &argc, argv)) == NULL) {
_exit(1);
}
XpGetDocumentData(display, pcontext,
PrintToFileProc, FinishProc,
(XPointer) file_desc);
XtAppMainLoop(app_context);
_exit(0);
}
void *PrintToFile_Consumer( void *handle )
#endif
{
MyPrintFileData *mpfd = (MyPrintFileData *)handle;
XEvent dummy;
struct timeval timeout;
timeout.tv_sec = 0;
timeout.tv_usec = 100000; /* 1/10 s */
XPU_DEBUG_ONLY(printf("### child running, getting data from '%s'.\n", mpfd->displayname));
/* we cannot reuse fork()'ed display handles - our child needs his own one */
if( (mpfd->pdpy = XPU_TRACE_CHILD(XOpenDisplay(mpfd->displayname))) == NULL )
{
perror("child cannot open display");
#ifdef XPU_USE_NSPR
return;
#else
return(NULL);
#endif
}
mpfd->done = False;
/* register "consumer" callbacks */
if( XPU_TRACE_CHILD(XpGetDocumentData(mpfd->pdpy, mpfd->pcontext,
MyPrintToFileProc, MyFinishProc,
(XPointer)mpfd)) == 0 )
{
XPU_DEBUG_ONLY(printf("XpGetDocumentData cannot register callbacks\n"));
#ifdef XPU_USE_NSPR
return;
#else
return(NULL);
#endif
}
/* loop forever - libXp has registered hidden event callbacks for the consumer
* callbacks - the finishCB will call set the "done" boolean after all...
*/
while( mpfd->done != True )
{
XNextEventTimeout(mpfd->pdpy, &dummy, &timeout);
}
XCloseDisplay(mpfd->pdpy);
#ifdef XPU_USE_THREADS
#ifdef XPU_USE_NSPR
return;
#else
return(NULL);
#endif
#else
/* write the status to the parent */
if( XPU_TRACE_CHILD(write(mpfd->pipe[1], &mpfd->status, sizeof(XPGetDocStatus))) != sizeof(XPGetDocStatus) )
{
perror("PrintToFile_Consumer: can't write XPGetDocStatus");
}
/* we don't do any free's or close's, as we are just
* going to exit, in fact, get out without calling any C++
* destructors, etc., as we don't want anything funny to happen
* to the parent
*/
XPU_TRACE_CHILD(_exit(EXIT_SUCCESS));
#endif /* XPU_USE_THREADS */
}