#else#ifdef HAVE_WAIT3    while ((wait3(NULL, WNOHANG, NULL)) > 0);#else#error You lose: neither waitpid() nor wait3() is available!#endif#endif}/* * main - start of mwm */intmain(int argc, char **argv){    int i, len;    char *display_string;    Bool option_error = False;    XtSetLanguageProc(NULL, NULL, NULL);    toplevel = XtVaAppInitialize(&app, "Mwm", NULL, 0, &argc, argv, NULL, NULL);    dpy = XtDisplay(toplevel);    for (i = 1; i < argc; i++)    {	if (strncmp(argv[i], "-debug", 6) == 0) /* non-standard option */	{	    debugging = True;	}	else if (strncmp(argv[i], "-multiscreen", 12) == 0)	{	    multiscreen = True;	}	else if (strncmp(argv[i], "-name", 5) == 0)	{	    if (++i >= argc)		usage();	    mwm_name = argv[i];	}	else if (strncmp(argv[i], "-screens", 8) == 0)	{	    if (++i >= argc)		usage();	    fprintf(stderr, "-screens is not yet supported\n");	}	else if (strncmp(argv[i], "-version", 8) == 0) /* non-standard option */	{   	    fprintf(stdout, "Mwm Version %s\n", VERSION);	}	else	{	    fprintf(stderr, "mwm:  Unknown option: `%s'\n", argv[i]);	    option_error = True;	}    }    if (option_error)	usage();    g_argv = argv;    if (signal(SIGINT, SIG_IGN) != SIG_IGN)	signal(SIGINT, sig_done);    if (signal(SIGHUP, SIG_IGN) != SIG_IGN)	signal(SIGHUP, sig_done);    if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)	signal(SIGQUIT, sig_done);    if (signal(SIGTERM, SIG_IGN) != SIG_IGN)	signal(SIGTERM, sig_done);    signal(SIGUSR1, sig_restart);    signal(SIGALRM, sig_alarm);#ifdef HAVE_SYSCONF    fd_width = sysconf(_SC_OPEN_MAX);#else# ifdef HAVE_GETDTABLESIZE    fd_width = getdtablesize();# else#  ifdef	HAVE_GETRLIMIT   {	struct rlimit rl;	getrlimit(RLIMIT_NOFILE, &rl);	fd_width = rl.rlim_cur;   }#  else#   error You lose#  endif# endif#endif#ifdef __CYGWIN__    /*     * Ugly hack because sys/types.h defines FD_SETSIZE as 64,     * when the comments there say it should be >= NOFILE in param.h,     * which happens to be 8192.     *     * This drops fd_width to 64 to match FD_SETSIZE;     */    if (fd_width > FD_SETSIZE) fd_width = FD_SETSIZE;#endif    x_fd = XConnectionNumber(dpy);    /*     * this is enormously dangerous, but _is_ the original code. MLM     */    if (fcntl(x_fd, F_SETFD, 1) == -1)    {	fprintf(stderr, "close-on-exec failed");	exit(1);    }    /*     * Add a DISPLAY entry to the environment, in case we were started     * with mwm -display term:0.0     */    len = strlen(XDisplayString(dpy));    display_string = XtMalloc(len + 10);    sprintf(display_string, "DISPLAY=%s", XDisplayString(dpy));    SetEnvironment("DISPLAY", XDisplayString(dpy));    /*     * Add a HOSTDISPLAY environment variable, which is the same as     * DISPLAY, unless display = :0.0 or unix:0.0, in which case the full     * host name will be used for ease in networking .     */    if (strncmp(display_string, "DISPLAY=:", 9) == 0)    {	char client[MAXHOSTNAME], *rdisplay_string;	gethostname(client, MAXHOSTNAME);	rdisplay_string = XtMalloc(len + 14 + strlen(client));	sprintf(rdisplay_string, "%s:%s", client, &display_string[9]);	SetEnvironment("HOSTDISPLAY", rdisplay_string);	XtFree(rdisplay_string);    }    else if (strncmp(display_string, "DISPLAY=unix:", 13) == 0)    {	char client[MAXHOSTNAME], *rdisplay_string;	gethostname(client, MAXHOSTNAME);	rdisplay_string = XtMalloc(len + 14 + strlen(client));	sprintf(rdisplay_string, "%s:%s", client,		&display_string[13]);	SetEnvironment("HOSTDISPLAY", rdisplay_string);	XtFree(rdisplay_string);    }    else    {	char *rdisplay_string;	rdisplay_string = XtMalloc(len + 14);	sprintf(rdisplay_string, "%s", XDisplayString(dpy));	SetEnvironment("HOSTDISPLAY", rdisplay_string);	XtFree(rdisplay_string);    }    XtFree(display_string);    initialize_mwm();    if (debugging) {	MouseButton *MouseEntry = Mwm.screen_info[0]->buttons;	fprintf(stderr, "Button Bindings:\n");	while (MouseEntry) {		fprintf(stderr,			"\tfunc %d %s button %d modifier %d context %s\n",			MouseEntry->func, _MwmPrintF(MouseEntry->func),			MouseEntry->button, MouseEntry->modifier,			_MwmPrintC(MouseEntry->context));		MouseEntry = MouseEntry->next;	}    }    while (True)    {	XEvent event;	last_event_type = 0;	if (EVENT_Next(&event))	{	    EVENT_Dispatch(&event);	}    }    return(0);}extern intSetEnvironment(const char *key, const char *value)#ifdef HAVE_PUTENV{  char *str;  int len, rc;   len=strlen(key)+strlen(value)+2;  str=(char *)malloc(len);  strcpy(str, key);  strcat(str, "=");  strcat(str, value);  rc=putenv(str);  /* do not free 'str' here! */  return rc;}#else#ifdef HAVE_SETENV{  int rc;  int overwrite=1;  rc=setenv(key, value, overwrite);  return rc;}#else#error You lose (neither putenv() nor setenv() are available!)#endif /* #ifdef HAVE_SETENV */#endif /* #ifdef HAVE_PUTENV *//* * find the config file *//* * The "Motif User's Guide [1]"  didn't mention what to do if; a. configFile *  is NOT defined,   b. configFile IS defined but it does not refer to a proper file *  (mulformed or unreadable), c. configFile does begin with "~" but not "~/". * The code below deals with these cases for conveniences. * * [1] (http://w3.pppl.gov/misc/motif/MotifUserGuide/en_US/Understanding_the_Resource_Description_File.html) */ extern char *find_config_file(void){    char *buf=NULL;    char *head=NULL, *lang=NULL, *home=NULL;    char *ptr=Mwm.config_file;    struct stat st;    Boolean rc=False;#if defined(HAVE_SYS_TYPES_H) && defined(HAVE_PWD_H)    struct passwd *passwd;#endif    home=getenv("HOME");    lang=getenv("LANG");    /* check for an absolute path in the given resource */#ifdef __EMX__    if ( Mwm.config_file[0]=='/' ||         (isalpha(Mwm.config_file[0]) && Mwm.config_file[0]==':') )#else    if ( Mwm.config_file[0]=='/' )#endif    {	head = "";	ptr = Mwm.config_file;    }    else if (Mwm.config_file[0]=='~')    {	ptr++;	if (Mwm.config_file[1] == '/')	{   /* ~ => $HOME */	    head = home;	    ptr++;	}	else#if defined(HAVE_SYS_TYPES_H) && defined(HAVE_PWD_H)	    	{   /* ~hoge => hoge's home */	    char *idx;            /* copy user name from "~hoge/foo" */	    idx = strchr(ptr, '/');	    if (idx == NULL)		 head = NULL;	    else	    {	         char *tmpbuf;		 	         tmpbuf=XtMalloc(idx-ptr+1);		 strncpy(tmpbuf, ptr, idx-ptr);		 tmpbuf[idx-ptr]='\0';		 passwd = getpwnam(tmpbuf);		 XtFree(tmpbuf);		 if (passwd != NULL)  {		    head = XtNewString(passwd->pw_dir);		    ptr = idx+1;		 }		 else		    head = NULL; /* no such user "hoge" */	    }	}#else	;  /* no <pwd.h>, no ~hoge */	head = NULL;#endif    }    else    {        /* search for the current dir */	head = getcwd(XtMalloc(MAX_PATH_LEN), MAX_PATH_LEN);    }/* * Head is either *	home directory, or *	NULL, or *	current directory */    if (head && lang)    {	buf=XtRealloc(buf, strlen(head) + strlen(lang) + strlen(ptr) + 3);	sprintf(buf, "%s/%s/%s", head, lang, ptr);	if (stat(buf, &st) == 0)	{	    return buf;	}    }    if (head)    {	buf=XtRealloc(buf, strlen(head) + strlen(ptr) + 2);	sprintf(buf, "%s/%s", head, ptr);	if (stat(buf, &st) == 0)	{	    return buf;	}    }    if (home && lang)    {	buf=XtRealloc(buf, strlen(home)+strlen(lang)+strlen(HOME_MWMRC)+3);	sprintf(buf, "%s/%s/%s", home, lang, HOME_MWMRC);	if (stat(buf, &st) == 0)	{	    return buf;	}    }    if (home)    {	buf=XtRealloc(buf, strlen(home)+strlen(HOME_MWMRC)+2);	sprintf(buf, "%s/%s", home, HOME_MWMRC);	if (stat(buf, &st) == 0)	{	    return buf;	}    }    if (lang)    {	buf=XtRealloc(buf, strlen(MWM_DDIR)+strlen(lang)+strlen(SYSTEM_MWMRC)+3);	sprintf(buf, "%s/%s/%s", MWM_DDIR, lang, SYSTEM_MWMRC); 	if (stat(buf, &st) == 0)	{	    return buf;	}    }	    buf=XtRealloc(buf, strlen(MWM_DDIR)+strlen(SYSTEM_MWMRC)+2);    sprintf(buf, "%s/%s", MWM_DDIR, SYSTEM_MWMRC);     if (stat(buf, &st) == 0)	{	    return buf;	}        XtFree(buf);    /* head is not always a pointer allocated in this function,       let's leak those few bytes here ... */    return NULL;}