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Comparing rxvt-unicode/src/command.C (file contents):
Revision 1.3 by pcg, Tue Nov 25 11:52:42 2003 UTC vs.
Revision 1.18 by pcg, Thu Dec 18 02:07:12 2003 UTC

1	/*--------------------------------*-C-*---------------------------------*	1	/*--------------------------------*-C-*---------------------------------*
2	* File: command.c	2	* File: command.c
3	*----------------------------------------------------------------------*	3	*----------------------------------------------------------------------*
4	* $Id: command.C,v 1.3 2003/11/25 11:52:42 pcg Exp $	4	* $Id: command.C,v 1.18 2003/12/18 02:07:12 pcg Exp $
5	*	5	*
6	* All portions of code are copyright by their respective author/s.	6	* All portions of code are copyright by their respective author/s.
7	* Copyright (c) 1992 John Bovey, University of Kent at Canterbury <jdb@ukc.ac.uk>	7	* Copyright (c) 1992 John Bovey, University of Kent at Canterbury <jdb@ukc.ac.uk>
8	* - original version	8	* - original version
9	* Copyright (c) 1994 Robert Nation <nation@rocket.sanders.lockheed.com>	9	* Copyright (c) 1994 Robert Nation <nation@rocket.sanders.lockheed.com>
…		…
61	unsigned int newlen;	61	unsigned int newlen;
62	KeySym keysym;	62	KeySym keysym;
63	#ifdef DEBUG_CMD	63	#ifdef DEBUG_CMD
64	static int debug_key = 1; /* accessible by a debugger only */	64	static int debug_key = 1; /* accessible by a debugger only */
65	#endif	65	#endif
66	#ifdef USE_XIM
67	int valid_keysym;	66	int valid_keysym;
68	#endif
69	unsigned char *kbuf = R->kbuf;	67	unsigned char *kbuf = R->kbuf;
70		68
71	/*	69	/*
72	* use Num_Lock to toggle Keypad on/off. If Num_Lock is off, allow an	70	* use Num_Lock to toggle Keypad on/off. If Num_Lock is off, allow an
73	* escape sequence to toggle the Keypad.	71	* escape sequence to toggle the Keypad.
…		…
75	* Always permit `shift' to override the current setting	73	* Always permit `shift' to override the current setting
76	*/	74	*/
77	shft = (ev->state & ShiftMask);	75	shft = (ev->state & ShiftMask);
78	ctrl = (ev->state & ControlMask);	76	ctrl = (ev->state & ControlMask);
79	meta = (ev->state & R->ModMetaMask);	77	meta = (ev->state & R->ModMetaMask);
		78
80	if (R->numlock_state || (ev->state & R->ModNumLockMask)) {	79	if (R->numlock_state || (ev->state & R->ModNumLockMask))
		80	{
81	R->numlock_state = (ev->state & R->ModNumLockMask);	81	R->numlock_state = (ev->state & R->ModNumLockMask);
82	PrivMode((!R->numlock_state), PrivMode_aplKP);	82	PrivMode((!R->numlock_state), PrivMode_aplKP);
83	}	83	}
		84
		85	kbuf[0] = 0;
		86
84	#ifdef USE_XIM	87	#ifdef USE_XIM
85	if (R->Input_Context != NULL) {	88	if (R->Input_Context)
		89	{
86	Status status_return;	90	Status status_return;
87		91
88	kbuf[0] = '\0';
89	#ifdef X_HAVE_UTF8_STRING	92	#ifdef X_HAVE_UTF8_STRING
90	len = Xutf8LookupString(R->Input_Context, ev, (char *)kbuf,	93	len = Xutf8LookupString (R->Input_Context, ev, (char *)kbuf,
91	KBUFSZ, &keysym, &status_return);	94	KBUFSZ, &keysym, &status_return);
92	#else	95	#else
		96	wchar_t wkbuf[KBUFSZ + 1];
		97
		98	// assume wchar_t == unicode or better
93	len = XmbLookupString(R->Input_Context, ev, (char *)kbuf,	99	len = XwcLookupString (R->Input_Context, ev, wkbuf,
94	KBUFSZ, &keysym, &status_return);	100	KBUFSZ, &keysym, &status_return);
		101
		102	if (status_return == XLookupChars
		103	|| status_return == XLookupBoth)
		104	{
		105	wkbuf[len] = 0;
		106	len = wcstombs ((char *)kbuf, wkbuf, KBUFSZ);
		107	}
		108	else
		109	len = 0;
95	#endif	110	#endif
96	valid_keysym = ((status_return == XLookupKeySym)	111	valid_keysym = status_return == XLookupKeySym
97	|| (status_return == XLookupBoth));	112	|| status_return == XLookupBoth;
		113	}
98	} else {	114	else
		115	#endif
		116	{
99	len = XLookupString(ev, (char *)kbuf, KBUFSZ, &keysym,	117	len = XLookupString (ev, (char *)kbuf, KBUFSZ, &keysym, &R->compose);
100	&R->compose);
101	valid_keysym = 1;	118	valid_keysym = !len;
102	}	119	}
103	#else /* USE_XIM */
104	len = XLookupString(ev, (char *)kbuf, KBUFSZ, &keysym,
105	&R->compose);
106	/*
107	* map unmapped Latin[2-4]/Katakana/Arabic/Cyrillic/Greek entries -> Latin1
108	* good for installations with correct fonts, but without XLOCALE
109	*/
110	if (!len) {
111	if ((keysym >= 0x0100) && (keysym < 0x0800)) {
112	kbuf[0] = (keysym & 0xFF);
113	kbuf[1] = '\0';
114	len = 1;
115	} else
116	kbuf[0] = '\0';
117	}
118	#endif /* USE_XIM */
119		120
120	#ifdef USE_XIM
121	if (valid_keysym)	121	if (valid_keysym)
122	#endif
123	{	122	{
124	/* for some backwards compatibility */	123	/* for some backwards compatibility */
125	#if defined(HOTKEY_CTRL) || defined(HOTKEY_META)	124	#if defined(HOTKEY_CTRL) || defined(HOTKEY_META)
126	# ifdef HOTKEY_CTRL	125	# ifdef HOTKEY_CTRL
127	if (ctrl) {	126	if (ctrl)
128	# else	127	# else
129	if (meta) {	128	if (meta)
130	# endif	129	# endif
		130	{
131	if (keysym == R->ks_bigfont) {	131	if (keysym == R->ks_bigfont)
		132	{
132	rxvt_change_font(aR_ 0, FONT_UP);	133	rxvt_change_font(aR_ 0, FONT_UP);
133	return;	134	return;
		135	}
134	} else if (keysym == R->ks_smallfont) {	136	else if (keysym == R->ks_smallfont)
		137	{
135	rxvt_change_font(aR_ 0, FONT_DN);	138	rxvt_change_font(aR_ 0, FONT_DN);
136	return;	139	return;
137	}	140	}
138	}	141	}
139	#endif	142	#endif
140		143
141	if (R->TermWin.saveLines) {	144	if (R->TermWin.saveLines) {
142	#ifdef UNSHIFTED_SCROLLKEYS	145	#ifdef UNSHIFTED_SCROLLKEYS
143	if (!ctrl && !meta) {	146	if (!ctrl && !meta) {
…		…
237	/* escape prefix */	240	/* escape prefix */
238	if (meta)	241	if (meta)
239	# ifdef META8_OPTION	242	# ifdef META8_OPTION
240	if (R->meta_char == C0_ESC)	243	if (R->meta_char == C0_ESC)
241	# endif	244	# endif
242	rxvt_tt_write(aR_ &ch, 1);	245	R->tt_write (&ch, 1);
243	rxvt_tt_write(aR_ kbuf0, l);	246	R->tt_write (kbuf0, l);
244	return;	247	return;
245	} else	248	} else
246	#endif	249	#endif
247	{	250	{
248	newlen = 1;	251	newlen = 1;
…		…
572	if (R->greek_mode)	575	if (R->greek_mode)
573	len = greek_xlat(kbuf, len);	576	len = greek_xlat(kbuf, len);
574	#endif	577	#endif
575	/* nil */ ;	578	/* nil */ ;
576	}	579	}
577	}	580	}
578		581
579	if (len <= 0)	582	if (len <= 0)
580	return; /* not mapped */	583	return; /* not mapped */
581		584
582	if (R->Options & Opt_scrollTtyKeypress)	585	if (R->Options & Opt_scrollTtyKeypress)
…		…
605	&& (R->meta_char == C0_ESC)	608	&& (R->meta_char == C0_ESC)
606	#endif	609	#endif
607	) {	610	) {
608	const unsigned char ch = C0_ESC;	611	const unsigned char ch = C0_ESC;
609		612
610	rxvt_tt_write(aR_ &ch, 1);	613	R->tt_write(&ch, 1);
611	}	614	}
612	#ifdef DEBUG_CMD	615	#ifdef DEBUG_CMD
613	if (debug_key) { /* Display keyboard buffer contents */	616	if (debug_key) { /* Display keyboard buffer contents */
614	char *p;	617	char *p;
615	int i;	618	int i;
…		…
618	for (i = 0, p = kbuf; i < len; i++, p++)	621	for (i = 0, p = kbuf; i < len; i++, p++)
619	fprintf(stderr, (*p >= ' ' && *p < '\177' ? "%c" : "\\%03o"), *p);	622	fprintf(stderr, (*p >= ' ' && *p < '\177' ? "%c" : "\\%03o"), *p);
620	fprintf(stderr, "'\n");	623	fprintf(stderr, "'\n");
621	}	624	}
622	#endif /* DEBUG_CMD */	625	#endif /* DEBUG_CMD */
623	rxvt_tt_write(aR_ kbuf, (unsigned int)len);	626	R->tt_write(kbuf, (unsigned int)len);
624	}	627	}
625	/*}}} */	628	/*}}} */
626		629
627	#if (MENUBAR_MAX)	630	#if (MENUBAR_MAX)
628	/*{{{ rxvt_cmd_write(), rxvt_cmd_getc() */	631	/*{{{ rxvt_cmd_write(), rxvt_cmd_getc() */
…		…
632	rxvt_cmd_write(pR_ const unsigned char *str, unsigned int count)	635	rxvt_cmd_write(pR_ const unsigned char *str, unsigned int count)
633	{	636	{
634	unsigned int n, s;	637	unsigned int n, s;
635	unsigned char *cmdbuf_base = R->cmdbuf_base,	638	unsigned char *cmdbuf_base = R->cmdbuf_base,
636	*cmdbuf_endp = R->cmdbuf_endp,	639	*cmdbuf_endp = R->cmdbuf_endp,
637	*cmdbuf_ptr = R->cmdbuf_ptr;	640	*cmdbuf_ptr = R->cmdbuf_ptr;
638		641
639	n = cmdbuf_ptr - cmdbuf_base;	642	n = cmdbuf_ptr - cmdbuf_base;
640	s = cmdbuf_base + BUFSIZ - 1 - cmdbuf_endp;	643	s = cmdbuf_base + BUFSIZ - 1 - cmdbuf_endp;
641	if (n > 0 && s < count) {	644	if (n > 0 && s < count) {
642	MEMMOVE(cmdbuf_base, cmdbuf_ptr,	645	MEMMOVE(cmdbuf_base, cmdbuf_ptr,
…		…
656	return 0;	659	return 0;
657	}	660	}
658	#endif /* MENUBAR_MAX */	661	#endif /* MENUBAR_MAX */
659		662
660	void	663	void
		664	rxvt_term::flush ()
		665	{
		666	#ifdef TRANSPARENT
		667	if (want_full_refresh)
		668	{
		669	want_full_refresh = 0;
		670	rxvt_scr_clear (this);
		671	rxvt_scr_touch (this, False);
		672	want_refresh = 1;
		673	}
		674	#endif
		675
		676	if (want_refresh)
		677	{
		678	rxvt_scr_refresh (this, refresh_type);
		679	rxvt_scrollbar_show (this, 1);
		680	#ifdef USE_XIM
		681	rxvt_IMSendSpot (this);
		682	#endif
		683	}
		684
		685	XFlush (Xdisplay);
		686	#if 0
		687	if (XPending (Xdisplay)) process_x_events ();
		688	if (XPending (Xdisplay)) process_x_events ();
		689	#endif
		690	}
		691
		692	void
		693	rxvt_term::check_cb (check_watcher &w)
		694	{
		695	SET_R (this);
		696
		697	flush ();
		698	}
		699
		700	void
661	rxvt_term::process_x_events ()	701	rxvt_term::process_x_events ()
662	{	702	{
663	do	703	do
664	{	704	{
665	XEvent xev;	705	XEvent xev;
666		706
667	XNextEvent (Xdisplay, &xev);	707	XNextEvent (Xdisplay, &xev);
		708
668	#if defined(CURSOR_BLINK)	709	#if defined(CURSOR_BLINK)
669	if ((Options & Opt_cursorBlink)	710	if ((Options & Opt_cursorBlink)
670	&& xev.type == KeyPress) {	711	&& xev.type == KeyPress)
		712	{
671	if (hidden_cursor) {	713	if (hidden_cursor)
		714	{
672	hidden_cursor = 0;	715	hidden_cursor = 0;
673	want_refresh = 1;	716	want_refresh = 1;
674	}	717	}
675	want_keypress_time = 1;	718
		719	blink_ev.start (NOW + BLINK_INTERVAL);
676	}	720	}
677	#endif	721	#endif
678		722
679	#if defined(POINTER_BLANK)	723	#if defined(POINTER_BLANK)
680	if ((Options & Opt_pointerBlank)	724	if ((Options & Opt_pointerBlank)
681	&& (pointerBlankDelay > 0)) {	725	&& (pointerBlankDelay > 0))
		726	{
682	if (xev.type == MotionNotify	727	if (xev.type == MotionNotify
683	|| xev.type == ButtonPress	728	|| xev.type == ButtonPress
684	|| xev.type == ButtonRelease) {	729	|| xev.type == ButtonRelease)
685	if (hidden_pointer)	730	if (hidden_pointer)
686	rxvt_pointer_unblank(aR);	731	pointer_unblank ();
687	want_motion_time = 1;	732
688	}
689	if (xev.type == KeyPress && hidden_pointer == 0)	733	if (xev.type == KeyPress && hidden_pointer == 0)
690	rxvt_pointer_blank (this);	734	pointer_blank ();
691	}	735	}
692	#endif	736	#endif
693		737
694	#ifdef USE_XIM	738	#ifdef USE_XIM
695	if (!XFilterEvent (&xev, xev.xany.window))	739	if (!XFilterEvent (&xev, xev.xany.window))
696	#endif	740	#endif
…		…
698	}	742	}
699	while (XPending (Xdisplay));	743	while (XPending (Xdisplay));
700	}	744	}
701		745
702	void	746	void
		747	rxvt_term::blink_cb (time_watcher &w)
		748	{
		749	SET_R (this);
		750
		751	w.at += BLINK_INTERVAL;
		752	hidden_cursor = !hidden_cursor;
		753	want_refresh = 1;
		754	}
		755
		756	void
703	rxvt_term::x_cb (io_watcher &w, short revents)	757	rxvt_term::x_cb (io_watcher &w, short revents)
704	{	758	{
		759	SET_R (this);
		760
705	process_x_events ();	761	process_x_events ();
		762	}
		763
		764	bool
		765	rxvt_term::pty_fill ()
		766	{
		767	ssize_t n = cmdbuf_endp - cmdbuf_ptr;
		768
		769	memmove (cmdbuf_base, cmdbuf_ptr, n);
		770	cmdbuf_ptr = cmdbuf_base;
		771	cmdbuf_endp = cmdbuf_ptr + n;
		772
		773	n = read (cmd_fd, cmdbuf_endp, BUFSIZ - n);
		774
		775	if (n > 0)
		776	{
		777	cmdbuf_endp += n;
		778	return true;
		779	}
		780	else if (n < 0 && errno != EAGAIN)
		781	destroy ();
		782
		783	return false;
		784	}
		785
		786	void
		787	rxvt_term::pty_cb (io_watcher &w, short revents)
		788	{
		789	SET_R (this);
		790
		791	if (revents & EVENT_WRITE)
		792	tt_write (0, 0);
		793	else if (revents & EVENT_READ)
		794	{
		795	bool flag = true;
		796
		797	// loop, but don't allow a single term to monopolize us
		798	// the number of loops is fully arbitrary, and thus wrong
		799	while (flag && pty_fill ())
		800	{
		801	if (!seen_input)
		802	{
		803	seen_input = 1;
		804	/* once we know the shell is running, send the screen size. Again! */
		805	tt_winch ();
		806	}
		807
		808	uint32_t ch = NOCHAR;
		809
		810	for (;;)
		811	{
		812	if (ch == NOCHAR)
		813	ch = next_char ();
		814
		815	if (ch == NOCHAR) // TODO: improve
		816	break;
		817
		818	if (ch >= ' ' || ch == '\t' || ch == '\n' || ch == '\r')
		819	{
		820	/* Read a text string from the input buffer */
		821	uint32_t buf[BUFSIZ];
		822	bool refreshnow = false;
		823	int nlines = 0;
		824	uint32_t *str = buf;
		825
		826	*str++ = ch;
		827
		828	for (;;)
		829	{
		830	ch = next_char ();
		831
		832	if (ch == NOCHAR || (ch < ' ' && ch != '\t' && ch != '\n' && ch != '\r'))
		833	break;
		834	else
		835	{
		836	*str++ = ch;
		837
		838	if (ch == '\n')
		839	{
		840	nlines++;
		841	refresh_count++;
		842
		843	if (!(Options & Opt_jumpScroll)
		844	|| (refresh_count >= (refresh_limit * (TermWin.nrow - 1))))
		845	{
		846	refreshnow = true;
		847	flag = false;
		848	ch = NOCHAR;
		849	break;
		850	}
		851	}
		852
		853	if (str >= buf + BUFSIZ)
		854	{
		855	ch = NOCHAR;
		856	break;
		857	}
		858	}
		859	}
		860
		861	rxvt_scr_add_lines (this, buf, nlines, str - buf);
		862
		863	/*
		864	* If there have been a lot of new lines, then update the screen
		865	* What the heck I'll cheat and only refresh less than every page-full.
		866	* the number of pages between refreshes is refresh_limit, which
		867	* is incremented here because we must be doing flat-out scrolling.
		868	*
		869	* refreshing should be correct for small scrolls, because of the
		870	* time-out
		871	*/
		872	if (refreshnow)
		873	{
		874	if ((Options & Opt_jumpScroll) && refresh_limit < REFRESH_PERIOD)
		875	refresh_limit++;
		876
		877	rxvt_scr_refresh (this, refresh_type);
		878	}
		879
		880	}
		881	else
		882	{
		883	switch (ch)
		884	{
		885	default:
		886	rxvt_process_nonprinting (this, ch);
		887	break;
		888	case C0_ESC: /* escape char */
		889	rxvt_process_escape_seq (this);
		890	break;
		891	/*case 0x9b: */ /* CSI */
		892	/* rxvt_process_csi_seq (this); */
		893	}
		894
		895	ch = NOCHAR;
		896	}
		897	}
		898	}
		899	}
706	}	900	}
707		901
708	// read the next character, currently handles UTF-8	902	// read the next character, currently handles UTF-8
709	// will probably handle all sorts of other stuff in the future	903	// will probably handle all sorts of other stuff in the future
710	static uint32_t	904	uint32_t
711	next_char (pR)	905	rxvt_term::next_char ()
712	{	906	{
713	mbstate &s = R->mbstate;	907	struct mbstate &s = mbstate;
714		908
715	while (R->cmdbuf_ptr < R->cmdbuf_endp)	909	while (cmdbuf_ptr < cmdbuf_endp)
716	{	910	{
717	uint8_t ch = *R->cmdbuf_ptr;	911	uint8_t ch = *cmdbuf_ptr;
718		912
719	if (s.cnt)	913	if (s.cnt)
720	{	914	{
721	if ((ch & 0xc0) == 0x80)	915	if ((ch & 0xc0) == 0x80)
722	{	916	{
723	R->cmdbuf_ptr++;	917	cmdbuf_ptr++;
724		918
725	/* continuation */	919	/* continuation */
726	s.reg = (s.reg << 6) | (ch & 0x7f);	920	s.reg = (s.reg << 6) | (ch & 0x7f);
727		921
728	if (--s.cnt == 0 && s.reg >= 128) /* if !inrange then corruption or Racking */	922	if (--s.cnt == 0 && s.reg >= 128) /* if !inrange then corruption or Racking */
…		…
737	}	931	}
738	}	932	}
739		933
740	if ((ch & 0xc0) == 0xc0)	934	if ((ch & 0xc0) == 0xc0)
741	{	935	{
742	R->cmdbuf_ptr++;	936	cmdbuf_ptr++;
743		937
744	/* first byte */	938	/* first byte */
745	s.orig = ch; /* for broken encodings */	939	s.orig = ch; /* for broken encodings */
746	s.reg = ch;	940	s.reg = ch;
747	if ((ch & 0xe0) == 0xc0) { s.reg &= 0x1f; s.cnt = 1; }	941	if ((ch & 0xe0) == 0xc0) { s.reg &= 0x1f; s.cnt = 1; }
…		…
750	if ((ch & 0xfc) == 0xf8) { s.reg &= 0x03; s.cnt = 4; }	944	if ((ch & 0xfc) == 0xf8) { s.reg &= 0x03; s.cnt = 4; }
751	if ((ch & 0xfe) == 0xfc) { s.reg &= 0x01; s.cnt = 5; }	945	if ((ch & 0xfe) == 0xfc) { s.reg &= 0x01; s.cnt = 5; }
752	}	946	}
753	else	947	else
754	{	948	{
755	R->cmdbuf_ptr++; /* _occasional_ non-utf8 may slip through... */	949	cmdbuf_ptr++; /* _occasional_ non-utf8 may slip through... */
756	return ch;	950	return ch;
757	}	951	}
758	}	952	}
759		953
760	return NOCHAR;	954	return NOCHAR;
761	}
762
763	void
764	rxvt_term::pty_cb (io_watcher &w, short revents)
765	{
766	int n;
767	unsigned int count;
768
769	if (count = (cmdbuf_endp - cmdbuf_ptr))
770	{
771	memmove (cmdbuf_base, cmdbuf_ptr, count);
772	cmdbuf_ptr = cmdbuf_base;
773	cmdbuf_endp = cmdbuf_ptr + count;
774	}
775
776
777	for (count = BUFSIZ - count; count; count -= n, cmdbuf_endp += n)
778	if ((n = read(cmd_fd, cmdbuf_endp, count)) > 0)
779	continue;
780	else if (n == 0 || (n < 0 && errno == EAGAIN))
781	break;
782	else
783	{
784	rxvt_clean_exit();
785	exit(EXIT_FAILURE); /* bad order of events? */
786	}
787
788	if (count != BUFSIZ) /* some characters read in */
789	{
790	uint32_t c = next_char (this);
791
792	#if 0
793	if (c != NOCHAR)
794	return c;
795	#endif
796	}
797	}	955	}
798		956
799	/* rxvt_cmd_getc() - Return next input character */	957	/* rxvt_cmd_getc() - Return next input character */
800	/*	958	/*
801	* Return the next input character after first passing any keyboard input	959	* Return the next input character after first passing any keyboard input
…		…
803	*/	961	*/
804	/* INTPROTO */	962	/* INTPROTO */
805	uint32_t	963	uint32_t
806	rxvt_cmd_getc(pR)	964	rxvt_cmd_getc(pR)
807	{	965	{
		966	for (;;)
		967	{
		968	uint32_t c = R->next_char ();
		969	if (c != NOCHAR)
		970	return c;
		971
		972	// incomplete sequences should occur rarely, still, a better solution
		973	// would be preferred. either setjmp/longjmp or better design.
		974	fcntl (R->cmd_fd, F_SETFL, 0);
		975	R->pty_fill ();
		976	fcntl (R->cmd_fd, F_SETFL, O_NONBLOCK);
		977	}
		978
		979	#if 0
808	#define TIMEOUT_USEC 5000	980	#define TIMEOUT_USEC 5000
809	fd_set readfds;	981	fd_set readfds;
810	int quick_timeout, select_res;	982	int quick_timeout, select_res;
811	int want_motion_time, want_keypress_time;	983	int want_motion_time, want_keypress_time;
812	struct timeval value;	984	struct timeval value;
813	#if defined(POINTER_BLANK) || defined(CURSOR_BLINK)	985	#if defined(POINTER_BLANK) || defined(CURSOR_BLINK)
814	struct timeval tp;	986	struct timeval tp;
815	#endif	987	#endif
816		988
817	uint32_t c = next_char (aR);
818	if (c != NOCHAR)
819	return c;
820
821	for (;;) {	989	for (;;) {
822	/* loop until we can return something */	990	/* loop until we can return something */
823		991
824	if (R->v_bufstr < R->v_bufptr) /* output any pending chars */	992	if (R->v_bufstr < R->v_bufptr) /* output any pending chars */
825	rxvt_tt_write(aR_ NULL, 0);	993	R->tt_write(NULL, 0);
826
827	#if defined(POINTER_BLANK) || defined(CURSOR_BLINK)
828	tp.tv_sec = 0; /* presume == 0 implies time not yet retrieved */
829	#endif
830	#if defined(CURSOR_BLINK)
831	want_keypress_time = 0;
832	#endif
833	#if defined(POINTER_BLANK)
834	want_motion_time = 0;
835	#endif
836
837	if (XPending (R->Xdisplay))
838	{
839	R->process_x_events ();
840
841	/* in case button actions pushed chars to cmdbuf */
842	if (R->cmdbuf_ptr < R->cmdbuf_endp)
843	return *R->cmdbuf_ptr++;
844	}
845
846	#if defined(CURSOR_BLINK)
847	if (want_keypress_time) {
848	(void)gettimeofday(&tp, NULL);
849	R->lastcursorchange.tv_sec = tp.tv_sec;
850	R->lastcursorchange.tv_usec = tp.tv_usec;
851	}
852	#endif
853	#if defined(POINTER_BLANK)
854	if (want_motion_time) {
855	if (!tp.tv_sec)
856	(void)gettimeofday(&tp, NULL);
857	R->lastmotion.tv_sec = tp.tv_sec;
858	R->lastmotion.tv_usec = tp.tv_usec;
859	}
860	#endif
861
862	/*
863	* the command input buffer is empty and we have no pending X events
864	*/
865	quick_timeout = 0;
866		994
867	#if defined(MOUSE_WHEEL) && defined(MOUSE_SLIP_WHEELING)	995	#if defined(MOUSE_WHEEL) && defined(MOUSE_SLIP_WHEELING)
868	if (R->mouse_slip_wheel_speed) {	996	if (R->mouse_slip_wheel_speed) {
869	quick_timeout = 1;	997	quick_timeout = 1;
870	if (!R->mouse_slip_wheel_delay--	998	if (!R->mouse_slip_wheel_delay--
…		…
900	R->want_refresh = 1;	1028	R->want_refresh = 1;
901	}	1029	}
902	}	1030	}
903	#endif /* NO_SCROLLBAR_BUTTON_CONTINUAL_SCROLLING */	1031	#endif /* NO_SCROLLBAR_BUTTON_CONTINUAL_SCROLLING */
904		1032
905	FD_ZERO(&readfds);
906	FD_SET(R->cmd_fd, &readfds);
907	FD_SET(R->Xfd, &readfds);
908	value.tv_usec = TIMEOUT_USEC;
909	value.tv_sec = 0;
910
911	if (!R->TermWin.mapped)
912	quick_timeout = 0;
913	else {
914	quick_timeout |= R->want_refresh;
915	#ifdef TRANSPARENT	1033	#ifdef TRANSPARENT
916	quick_timeout |= R->want_full_refresh;	1034	quick_timeout |= R->want_full_refresh;
917	#endif	1035	#endif
918	}
919
920	#if defined(POINTER_BLANK) || defined(CURSOR_BLINK)
921	{
922	int set_quick_timeout = 0;
923	long csdiff, psdiff;
924
925	#define BLINK_TIME 500000L
926	csdiff = psdiff = 60000000L; /* or, say, LONG_MAX */
927	# if defined(CURSOR_BLINK)
928	if (R->Options & Opt_cursorBlink) {
929	if (!tp.tv_sec) /* didn't get it before so get it now */
930	(void)gettimeofday(&tp, NULL);
931
932	csdiff = (tp.tv_sec - R->lastcursorchange.tv_sec) * 1000000L
933	+ tp.tv_usec - R->lastcursorchange.tv_usec;
934	if (csdiff > BLINK_TIME) { /* XXX: settable blink times */
935	R->lastcursorchange.tv_sec = tp.tv_sec;
936	R->lastcursorchange.tv_usec = tp.tv_usec;
937	R->hidden_cursor = !R->hidden_cursor;
938	csdiff = 0;
939	} else
940	csdiff = BLINK_TIME - csdiff;
941	set_quick_timeout = 1;
942	}
943	# endif	1036	#endif
944	# if defined(POINTER_BLANK)
945	/*
946	* If we haven't moved the pointer for a while
947	*/
948	if ((R->Options & Opt_pointerBlank)
949	&& (R->pointerBlankDelay > 0)
950	&& (R->hidden_pointer == 0)) {
951	long pdelay;
952
953	if (!tp.tv_sec) /* didn't get it before so get it now */
954	(void)gettimeofday(&tp, NULL);
955	psdiff = (tp.tv_sec - R->lastmotion.tv_sec) * 1000000L
956	+ tp.tv_usec - R->lastmotion.tv_usec;
957	pdelay = R->pointerBlankDelay * 1000000L;
958	if (psdiff >= pdelay)
959	rxvt_pointer_blank(aR);
960	else {
961	set_quick_timeout = 1;
962	psdiff = pdelay - psdiff;
963	}
964	}
965	# endif
966	if (!quick_timeout && set_quick_timeout) {
967	MIN_IT(csdiff, psdiff);
968	value.tv_sec = csdiff / 1000000L;
969	value.tv_usec = csdiff % 1000000L;
970	quick_timeout = 1;
971	}
972	}
973	#endif
974
975	if ((select_res = select(R->num_fds, &readfds, NULL, NULL,
976	(quick_timeout ? &value : NULL))) == 0) {
977	/* select statement timed out - we're not hard and fast scrolling */
978	R->refresh_limit = 1;
979	}
980	#if defined(CURSOR_BLINK)
981	if (R->Options & Opt_cursorBlink)
982	R->want_refresh = 1;
983	#endif
984
985	/* See if we can read new data from the application */
986	if (select_res > 0 && FD_ISSET(R->cmd_fd, &readfds)) {
987	int n;
988	unsigned int count;
989
990	R->cmdbuf_ptr = R->cmdbuf_endp = R->cmdbuf_base;
991	for (count = BUFSIZ; count; count -= n, R->cmdbuf_endp += n)
992	if ((n = read(R->cmd_fd, R->cmdbuf_endp, count)) > 0)
993	continue;
994	else if (n == 0 || (n < 0 && errno == EAGAIN))
995	break;
996	else {
997	rxvt_clean_exit();
998	exit(EXIT_FAILURE); /* bad order of events? */
999	}
1000
1001	if (count != BUFSIZ) /* some characters read in */
1002	{
1003	uint32_t c = next_char (aR);
1004	if (c != NOCHAR)
1005	return c;
1006	}
1007	}
1008	#ifdef TRANSPARENT
1009	if (R->want_full_refresh) {
1010	R->want_full_refresh = 0;
1011	rxvt_scr_clear(aR);
1012	rxvt_scr_touch(aR_ False);
1013	R->want_refresh = 1;
1014	}
1015	#endif
1016	if (R->want_refresh) {
1017	rxvt_scr_refresh(aR_ R->refresh_type);
1018	rxvt_scrollbar_show(aR_ 1);
1019	#ifdef USE_XIM
1020	rxvt_IMSendSpot(aR);
1021	#endif
1022	}
1023	}
1024	/* NOTREACHED */
1025	}	1037	}
1026	/*}}} */
1027		1038
1028	/* EXTPROTO */
1029	void	1039	void
1030	rxvt_pointer_unblank(pR)	1040	rxvt_term::pointer_unblank ()
1031	{	1041	{
1032	XDefineCursor(R->Xdisplay, R->TermWin.vt, R->TermWin_cursor);	1042	XDefineCursor (Xdisplay, TermWin.vt, TermWin_cursor);
1033	rxvt_recolour_cursor(aR);	1043	rxvt_recolour_cursor (this);
		1044
1034	#ifdef POINTER_BLANK	1045	#ifdef POINTER_BLANK
1035	R->hidden_pointer = 0;	1046	hidden_pointer = 0;
1036	if (R->pointerBlankDelay > 0) {
1037	struct timeval tp;
1038		1047
1039	(void)gettimeofday(&tp, NULL);	1048	if (Options & Opt_pointerBlank)
1040	R->lastmotion.tv_sec = tp.tv_sec;	1049	pointer_ev.start (NOW + pointerBlankDelay);
1041	R->lastmotion.tv_usec = tp.tv_usec;
1042	}
1043	#endif	1050	#endif
1044	}	1051	}
1045		1052
1046	#ifdef POINTER_BLANK	1053	#ifdef POINTER_BLANK
1047	/* INTPROTO */
1048	void	1054	void
1049	rxvt_pointer_blank(pR)	1055	rxvt_term::pointer_blank ()
1050	{	1056	{
		1057	pointer_ev.stop ();
		1058
		1059	if (!(Options & Opt_pointerBlank))
		1060	return;
		1061
1051	XDefineCursor(R->Xdisplay, R->TermWin.vt, R->pointer_blank);	1062	XDefineCursor (Xdisplay, TermWin.vt, blank_cursor);
1052	XFlush(R->Xdisplay);	1063	XFlush (Xdisplay);
		1064
1053	R->hidden_pointer = 1;	1065	hidden_pointer = 1;
		1066	}
		1067
		1068	void
		1069	rxvt_term::pointer_cb (time_watcher &w)
		1070	{
		1071	SET_R (this);
		1072
		1073	pointer_blank ();
1054	}	1074	}
1055	#endif	1075	#endif
1056		1076
1057	/* INTPROTO */	1077	/* INTPROTO */
1058	void	1078	void
…		…
1111	fprintf(stderr, "]: <%d>, %d/%d\n",	1131	fprintf(stderr, "]: <%d>, %d/%d\n",
1112	button_number,	1132	button_number,
1113	x + 1,	1133	x + 1,
1114	y + 1);	1134	y + 1);
1115	#else	1135	#else
1116	rxvt_tt_printf(aR_ "\033[M%c%c%c",	1136	R->tt_printf("\033[M%c%c%c",
1117	(32 + button_number + key_state),	1137	(32 + button_number + key_state),
1118	(32 + x + 1),	1138	(32 + x + 1),
1119	(32 + y + 1));	1139	(32 + y + 1));
1120	#endif	1140	#endif
1121	}	1141	}
…		…
1138	{	1158	{
1139	int i, want_timeout;	1159	int i, want_timeout;
1140	Window unused_root, unused_child;	1160	Window unused_root, unused_child;
1141	int unused_root_x, unused_root_y;	1161	int unused_root_x, unused_root_y;
1142	unsigned int unused_mask;	1162	unsigned int unused_mask;
1143	struct timeval tp;
1144		1163
1145	#ifdef DEBUG_X	1164	#ifdef DEBUG_X
1146	const char *const eventnames[] =	1165	const char *const eventnames[] =
1147	{ /* mason - this matches my system */	1166	{ /* mason - this matches my system */
1148	"",	1167	"",
…		…
1179	"SelectionNotify",	1198	"SelectionNotify",
1180	"ColormapNotify",	1199	"ColormapNotify",
1181	"ClientMessage",	1200	"ClientMessage",
1182	"MappingNotify"	1201	"MappingNotify"
1183	};	1202	};
		1203	#endif
		1204
		1205	#ifdef DEBUG_X
		1206	struct timeval tp;
1184	struct tm *ltt;	1207	struct tm *ltt;
1185	#endif
1186
1187	/*
1188	* check if we need to get the time for any timeouts
1189	*/
1190
1191	for (i = NUM_TIMEOUTS; i--; )
1192	if (R->timeout[i].tv_sec) {
1193	want_timeout = 1;
1194	break;
1195	}
1196
1197	#ifndef DEBUG_X
1198	if (want_timeout)
1199	#endif
1200	(void)gettimeofday(&tp, NULL);	1208	(void)gettimeofday(&tp, NULL);
1201
1202	#ifdef DEBUG_X
1203	ltt = localtime(&(tp.tv_sec));	1209	ltt = localtime(&(tp.tv_sec));
1204	D_X((stderr, "Event: %-16s %-7s %08lx (%4d-%02d-%02d %02d:%02d:%02d.%.6ld) %s %lu", eventnames[ev->type], (ev->xany.window == R->TermWin.parent[0] ? "parent" : (ev->xany.window == R->TermWin.vt ? "vt" : (ev->xany.window == R->scrollBar.win ? "scroll" : (ev->xany.window == R->menuBar.win ? "menubar" : "UNKNOWN")))), (ev->xany.window == R->TermWin.parent[0] ? R->TermWin.parent[0] : (ev->xany.window == R->TermWin.vt ? R->TermWin.vt : (ev->xany.window == R->scrollBar.win ? R->scrollBar.win : (ev->xany.window == R->menuBar.win ? R->menuBar.win : 0)))), ltt->tm_year + 1900, ltt->tm_mon + 1, ltt->tm_mday, ltt->tm_hour, ltt->tm_min, ltt->tm_sec, tp.tv_usec, ev->xany.send_event ? "S" : " ", ev->xany.serial));	1210	D_X((stderr, "Event: %-16s %-7s %08lx (%4d-%02d-%02d %02d:%02d:%02d.%.6ld) %s %lu", eventnames[ev->type], (ev->xany.window == R->TermWin.parent[0] ? "parent" : (ev->xany.window == R->TermWin.vt ? "vt" : (ev->xany.window == R->scrollBar.win ? "scroll" : (ev->xany.window == R->menuBar.win ? "menubar" : "UNKNOWN")))), (ev->xany.window == R->TermWin.parent[0] ? R->TermWin.parent[0] : (ev->xany.window == R->TermWin.vt ? R->TermWin.vt : (ev->xany.window == R->scrollBar.win ? R->scrollBar.win : (ev->xany.window == R->menuBar.win ? R->menuBar.win : 0)))), ltt->tm_year + 1900, ltt->tm_mon + 1, ltt->tm_mday, ltt->tm_hour, ltt->tm_min, ltt->tm_sec, tp.tv_usec, ev->xany.send_event ? "S" : " ", ev->xany.serial));
1205	#endif	1211	#endif
1206
1207	/* X event timeouts */
1208	if (want_timeout)
1209	for (i = NUM_TIMEOUTS; i--; ) {
1210	if (R->timeout[i].tv_sec == 0)
1211	continue;
1212	if ((tp.tv_sec < R->timeout[i].tv_sec)
1213	|| (tp.tv_sec == R->timeout[i].tv_sec
1214	&& tp.tv_usec < R->timeout[i].tv_usec))
1215	continue;
1216	R->timeout[i].tv_sec = 0;
1217	switch(i) {
1218	case TIMEOUT_INCR:
1219	rxvt_print_error("data loss: timeout on INCR selection paste");
1220	R->selection_wait = Sel_none;
1221	break;
1222	default:
1223	break;
1224	}
1225	}
1226		1212
1227	switch (ev->type) {	1213	switch (ev->type) {
1228	case KeyPress:	1214	case KeyPress:
1229	rxvt_lookup_key(aR_ (XKeyEvent *)ev);	1215	rxvt_lookup_key(aR_ (XKeyEvent *)ev);
1230	break;	1216	break;
…		…
1254	break;	1240	break;
1255		1241
1256	case ClientMessage:	1242	case ClientMessage:
1257	if (ev->xclient.format == 32	1243	if (ev->xclient.format == 32
1258	&& (Atom)ev->xclient.data.l[0] == R->xa[XA_WMDELETEWINDOW])	1244	&& (Atom)ev->xclient.data.l[0] == R->xa[XA_WMDELETEWINDOW])
1259	exit(EXIT_SUCCESS);	1245	R->destroy ();
1260	#ifdef OFFIX_DND	1246	#ifdef OFFIX_DND
1261	/* OffiX Dnd (drag 'n' drop) protocol */	1247	/* OffiX Dnd (drag 'n' drop) protocol */
1262	if (ev->xclient.message_type == R->xa[XA_DNDPROTOCOL]	1248	else if (ev->xclient.message_type == R->xa[XA_DNDPROTOCOL]
1263	&& (ev->xclient.data.l[0] == DndFile	1249	&& (ev->xclient.data.l[0] == DndFile
1264	|| ev->xclient.data.l[0] == DndDir	1250	|| ev->xclient.data.l[0] == DndDir
1265	|| ev->xclient.data.l[0] == DndLink)) {	1251	|| ev->xclient.data.l[0] == DndLink)) {
1266	/* Get Dnd data */	1252	/* Get Dnd data */
1267	Atom ActualType;	1253	Atom ActualType;
…		…
1299	* in the GraphicsExpose parts, which means that after each refresh,	1285	* in the GraphicsExpose parts, which means that after each refresh,
1300	* we need to wait for the graphics expose or Noexpose events,	1286	* we need to wait for the graphics expose or Noexpose events,
1301	* which ought to make things real slow!	1287	* which ought to make things real slow!
1302	*/	1288	*/
1303	case VisibilityNotify:	1289	case VisibilityNotify:
1304	switch (ev->xvisibility.state) {	1290	switch (ev->xvisibility.state)
		1291	{
1305	case VisibilityUnobscured:	1292	case VisibilityUnobscured:
1306	R->refresh_type = FAST_REFRESH;	1293	R->refresh_type = FAST_REFRESH;
1307	break;	1294	break;
1308	case VisibilityPartiallyObscured:	1295	case VisibilityPartiallyObscured:
1309	R->refresh_type = SLOW_REFRESH;	1296	R->refresh_type = SLOW_REFRESH;
1310	break;	1297	break;
1311	default:	1298	default:
1312	R->refresh_type = NO_REFRESH;	1299	R->refresh_type = NO_REFRESH;
1313	break;	1300	break;
1314	}	1301	}
1315	break;	1302	break;
1316		1303
1317	case FocusIn:	1304	case FocusIn:
1318	if (!R->TermWin.focus) {	1305	if (!R->TermWin.focus) {
1319	R->TermWin.focus = 1;	1306	R->TermWin.focus = 1;
1320	R->want_refresh = 1;	1307	R->want_refresh = 1;
1321	#ifdef USE_XIM	1308	#ifdef USE_XIM
1322	if (R->Input_Context != NULL)	1309	if (R->Input_Context != NULL)
1323	XSetICFocus(R->Input_Context);	1310	XSetICFocus(R->Input_Context);
1324	#endif	1311	#endif
		1312	#ifdef CURSOR_BLINK
		1313	if (R->Options & Opt_cursorBlink)
		1314	R->blink_ev.start (NOW + BLINK_INTERVAL);
		1315	#endif
1325	}	1316	}
1326	break;	1317	break;
1327		1318
1328	case FocusOut:	1319	case FocusOut:
1329	if (R->TermWin.focus) {	1320	if (R->TermWin.focus) {
1330	R->TermWin.focus = 0;	1321	R->TermWin.focus = 0;
1331	R->want_refresh = 1;	1322	R->want_refresh = 1;
1332	#ifdef USE_XIM	1323	#ifdef USE_XIM
1333	if (R->Input_Context != NULL)	1324	if (R->Input_Context != NULL)
1334	XUnsetICFocus(R->Input_Context);	1325	XUnsetICFocus(R->Input_Context);
		1326	#endif
		1327	#ifdef CURSOR_BLINK
		1328	if (R->Options & Opt_cursorBlink)
		1329	R->blink_ev.stop ();
		1330	R->hidden_cursor = 0;
1335	#endif	1331	#endif
1336	}	1332	}
1337	break;	1333	break;
1338		1334
1339	case ConfigureNotify:	1335	case ConfigureNotify:
…		…
1452	break;	1448	break;
1453		1449
1454	case MotionNotify:	1450	case MotionNotify:
1455	#ifdef POINTER_BLANK	1451	#ifdef POINTER_BLANK
1456	if (R->hidden_pointer)	1452	if (R->hidden_pointer)
1457	rxvt_pointer_unblank(aR);	1453	R->pointer_unblank ();
1458	#endif	1454	#endif
1459	#if MENUBAR	1455	#if MENUBAR
1460	if (isMenuBarWindow(ev->xany.window)) {	1456	if (isMenuBarWindow(ev->xany.window)) {
1461	rxvt_menubar_control(aR_ &(ev->xbutton));	1457	rxvt_menubar_control(aR_ &(ev->xbutton));
1462	break;	1458	break;
…		…
1559	*/	1555	*/
1560	if (ev->window == R->TermWin.vt)	1556	if (ev->window == R->TermWin.vt)
1561	{	1557	{
1562	#if RXVT_GRAPHICS	1558	#if RXVT_GRAPHICS
1563	if (ev->subwindow != None)	1559	if (ev->subwindow != None)
1564	rxvt_Gr_ButtonPress(ev->x, ev->y);	1560	rxvt_Gr_ButtonPress (ev->x, ev->y);
1565	else	1561	else
1566	#endif	1562	#endif
1567	{	1563	{
1568	clickintime = ev->time - R->MEvent.time < MULTICLICK_TIME;	1564	clickintime = ev->time - R->MEvent.time < MULTICLICK_TIME;
1569	if (reportmode)	1565	if (reportmode)
…		…
1653	*/	1649	*/
1654	if ((R->scrollBar.style == R_SB_NEXT	1650	if ((R->scrollBar.style == R_SB_NEXT
1655	&& scrollbarnext_upButton(ev->y))	1651	&& scrollbarnext_upButton(ev->y))
1656	|| (R->scrollBar.style == R_SB_RXVT	1652	|| (R->scrollBar.style == R_SB_RXVT
1657	&& scrollbarrxvt_upButton(ev->y)))	1653	&& scrollbarrxvt_upButton(ev->y)))
1658	rxvt_tt_printf(aR_ "\033[A");	1654	R->tt_printf("\033[A");
1659	else if ((R->scrollBar.style == R_SB_NEXT	1655	else if ((R->scrollBar.style == R_SB_NEXT
1660	&& scrollbarnext_dnButton(ev->y))	1656	&& scrollbarnext_dnButton(ev->y))
1661	|| (R->scrollBar.style == R_SB_RXVT	1657	|| (R->scrollBar.style == R_SB_RXVT
1662	&& scrollbarrxvt_dnButton(ev->y)))	1658	&& scrollbarrxvt_dnButton(ev->y)))
1663	rxvt_tt_printf(aR_ "\033[B");	1659	R->tt_printf("\033[B");
1664	else	1660	else
1665	switch (ev->button) {	1661	switch (ev->button) {
1666	case Button2:	1662	case Button2:
1667	rxvt_tt_printf(aR_ "\014");	1663	R->tt_printf("\014");
1668	break;	1664	break;
1669	case Button1:	1665	case Button1:
1670	rxvt_tt_printf(aR_ "\033[6~");	1666	R->tt_printf("\033[6~");
1671	break;	1667	break;
1672	case Button3:	1668	case Button3:
1673	rxvt_tt_printf(aR_ "\033[5~");	1669	R->tt_printf("\033[5~");
1674	break;	1670	break;
1675	}	1671	}
1676	}	1672	}
1677	else	1673	else
1678	#endif /* NO_SCROLLBAR_REPORT */	1674	#endif /* NO_SCROLLBAR_REPORT */
…		…
1834	break;	1830	break;
1835	#ifdef MOUSE_WHEEL	1831	#ifdef MOUSE_WHEEL
1836	case Button4:	1832	case Button4:
1837	case Button5:	1833	case Button5:
1838	{	1834	{
1839	int i, v;	1835	int i;
		1836	page_dirn v;
1840		1837
1841	v = (ev->button == Button4) ? UP : DN;	1838	v = (ev->button == Button4) ? UP : DN;
1842	if (ev->state & ShiftMask)	1839	if (ev->state & ShiftMask)
1843	i = 1;	1840	i = 1;
1844	else if ((R->Options & Opt_mouseWheelScrollPage))	1841	else if ((R->Options & Opt_mouseWheelScrollPage))
…		…
2019	n = 0;	2016	n = 0;
2020	if (pchanged) {	2017	if (pchanged) {
2021	for (; n < (unsigned int)i; n++) {	2018	for (; n < (unsigned int)i; n++) {
2022	XGetWindowAttributes(R->Xdisplay, R->TermWin.parent[n], &wattr);	2019	XGetWindowAttributes(R->Xdisplay, R->TermWin.parent[n], &wattr);
2023	D_X((stderr, "InheritPixmap Checking Parent[%d]: %s", n, (wattr.depth == rootdepth && wattr.class != InputOnly) ? "OK" : "FAIL"));	2020	D_X((stderr, "InheritPixmap Checking Parent[%d]: %s", n, (wattr.depth == rootdepth && wattr.class != InputOnly) ? "OK" : "FAIL"));
2024	if (wattr.depth != rootdepth || wattr.class == InputOnly) {	2021	if (wattr.depth != rootdepth || wattr.c_class == InputOnly) {
2025	n = (int)(sizeof(R->TermWin.parent) / sizeof(Window)) + 1;	2022	n = (int)(sizeof(R->TermWin.parent) / sizeof(Window)) + 1;
2026	break;	2023	break;
2027	}	2024	}
2028	}	2025	}
2029	}	2026	}
…		…
2079	return stream;	2076	return stream;
2080	}	2077	}
2081		2078
2082	/* EXTPROTO */	2079	/* EXTPROTO */
2083	int	2080	int
2084	rxvt_pclose_printer(FILE *stream)	2081	rxvt_pclose_printer (FILE *stream)
2085	{	2082	{
2086	fflush(stream);	2083	fflush (stream);
2087	/* pclose() reported not to work on SunOS 4.1.3 */	2084	/* pclose() reported not to work on SunOS 4.1.3 */
2088	# if defined (__sun__) /* TODO: RESOLVE THIS */	2085	# if defined (__sun__) /* TODO: RESOLVE THIS */
2089	/* pclose works provided SIGCHLD handler uses waitpid */	2086	/* pclose works provided SIGCHLD handler uses waitpid */
2090	return pclose(stream); /* return fclose (stream); */	2087	return pclose (stream); /* return fclose (stream); */
2091	# else	2088	# else
2092	return pclose(stream);	2089	return pclose (stream);
2093	# endif	2090	# endif
2094	}	2091	}
2095		2092
2096	/*	2093	/*
2097	* simulate attached vt100 printer	2094	* simulate attached vt100 printer
…		…
2160	rxvt_process_nonprinting(pR_ unsigned char ch)	2157	rxvt_process_nonprinting(pR_ unsigned char ch)
2161	{	2158	{
2162	switch (ch) {	2159	switch (ch) {
2163	case C0_ENQ: /* terminal Status */	2160	case C0_ENQ: /* terminal Status */
2164	if (R->rs[Rs_answerbackstring])	2161	if (R->rs[Rs_answerbackstring])
2165	rxvt_tt_write(aR_	2162	R->tt_write(
2166	(const unsigned char *)R->rs[Rs_answerbackstring],	2163	(const unsigned char *)R->rs[Rs_answerbackstring],
2167	(unsigned int)STRLEN(R->rs[Rs_answerbackstring]));	2164	(unsigned int)STRLEN(R->rs[Rs_answerbackstring]));
2168	else	2165	else
2169	rxvt_tt_write(aR_ (unsigned char *)VT100_ANS,	2166	R->tt_write((unsigned char *)VT100_ANS,
2170	(unsigned int)STRLEN(VT100_ANS));	2167	(unsigned int)STRLEN(VT100_ANS));
2171	break;	2168	break;
2172	case C0_BEL: /* bell */	2169	case C0_BEL: /* bell */
2173	rxvt_scr_bell(aR);	2170	rxvt_scr_bell(aR);
2174	break;	2171	break;
…		…
2237	row = rxvt_cmd_getc(aR) - ' ';	2234	row = rxvt_cmd_getc(aR) - ' ';
2238	col = rxvt_cmd_getc(aR) - ' ';	2235	col = rxvt_cmd_getc(aR) - ' ';
2239	rxvt_scr_gotorc(aR_ row, col, 0);	2236	rxvt_scr_gotorc(aR_ row, col, 0);
2240	break;	2237	break;
2241	case 'Z': /* identify the terminal type */	2238	case 'Z': /* identify the terminal type */
2242	rxvt_tt_printf(aR_ "\033/Z"); /* I am a VT100 emulating a VT52 */	2239	R->tt_printf("\033/Z"); /* I am a VT100 emulating a VT52 */
2243	break;	2240	break;
2244	case '<': /* turn off VT52 mode */	2241	case '<': /* turn off VT52 mode */
2245	PrivMode(0, PrivMode_vt52);	2242	PrivMode(0, PrivMode_vt52);
2246	break;	2243	break;
2247	case 'F': /* use special graphics character set */	2244	case 'F': /* use special graphics character set */
…		…
2354	rxvt_process_dcs_seq(aR);	2351	rxvt_process_dcs_seq(aR);
2355	break;	2352	break;
2356		2353
2357	/* 8.3.110: SINGLE CHARACTER INTRODUCER */	2354	/* 8.3.110: SINGLE CHARACTER INTRODUCER */
2358	case C1_SCI: /* ESC Z */	2355	case C1_SCI: /* ESC Z */
2359	rxvt_tt_write(aR_ (const unsigned char *)ESCZ_ANSWER,	2356	R->tt_write((const unsigned char *)ESCZ_ANSWER,
2360	(unsigned int)(sizeof(ESCZ_ANSWER) - 1));	2357	(unsigned int)(sizeof(ESCZ_ANSWER) - 1));
2361	break; /* steal obsolete ESC [ c */	2358	break; /* steal obsolete ESC [ c */
2362		2359
2363	/* 8.3.16: CONTROL SEQUENCE INTRODUCER */	2360	/* 8.3.16: CONTROL SEQUENCE INTRODUCER */
2364	case C1_CSI: /* ESC [ */	2361	case C1_CSI: /* ESC [ */
…		…
2485	*/	2482	*/
2486	if (priv) {	2483	if (priv) {
2487	switch (priv) {	2484	switch (priv) {
2488	case '>':	2485	case '>':
2489	if (ch == CSI_DA) /* secondary device attributes */	2486	if (ch == CSI_DA) /* secondary device attributes */
2490	rxvt_tt_printf(aR_ "\033[>%d;%-.8s;0c", 'R', VSTRING);	2487	R->tt_printf("\033[>%d;%-.8s;0c", 'R', VSTRING);
2491	break;	2488	break;
2492	case '?':	2489	case '?':
2493	if (ch == 'h' || ch == 'l' || ch == 'r' || ch == 's' || ch == 't')	2490	if (ch == 'h' || ch == 'l' || ch == 'r' || ch == 's' || ch == 't')
2494	rxvt_process_terminal_mode(aR_ ch, priv, nargs, arg);	2491	rxvt_process_terminal_mode(aR_ ch, priv, nargs, arg);
2495	break;	2492	break;
…		…
2598		2595
2599	case CSI_SD: /* 8.3.114: (1) SCROLL DOWN */	2596	case CSI_SD: /* 8.3.114: (1) SCROLL DOWN */
2600	arg[0] = -arg[0];	2597	arg[0] = -arg[0];
2601	/* FALLTHROUGH */	2598	/* FALLTHROUGH */
2602	case CSI_SU: /* 8.3.148: (1) SCROLL UP */	2599	case CSI_SU: /* 8.3.148: (1) SCROLL UP */
2603	rxvt_scroll_text(aR_ R->screen.tscroll, R->screen.bscroll, arg[0], 0);	2600	R->scr_scroll_text (R->screen.tscroll, R->screen.bscroll, arg[0], 0);
2604	break;	2601	break;
2605		2602
2606	case CSI_DA: /* 8.3.24: (0) DEVICE ATTRIBUTES */	2603	case CSI_DA: /* 8.3.24: (0) DEVICE ATTRIBUTES */
2607	rxvt_tt_write(aR_ (const unsigned char *)VT100_ANS,	2604	R->tt_write((const unsigned char *)VT100_ANS,
2608	(unsigned int)(sizeof(VT100_ANS) - 1));	2605	(unsigned int)(sizeof(VT100_ANS) - 1));
2609	break;	2606	break;
2610		2607
2611	case CSI_SGR: /* 8.3.118: (0) SELECT GRAPHIC RENDITION */	2608	case CSI_SGR: /* 8.3.118: (0) SELECT GRAPHIC RENDITION */
2612	rxvt_process_sgr_mode(aR_ nargs, arg);	2609	rxvt_process_sgr_mode(aR_ nargs, arg);
2613	break;	2610	break;
2614		2611
2615	case CSI_DSR: /* 8.3.36: (0) DEVICE STATUS REPORT */	2612	case CSI_DSR: /* 8.3.36: (0) DEVICE STATUS REPORT */
2616	switch (arg[0]) {	2613	switch (arg[0]) {
2617	case 5: /* DSR requested */	2614	case 5: /* DSR requested */
2618	rxvt_tt_printf(aR_ "\033[0n");	2615	R->tt_printf("\033[0n");
2619	break;	2616	break;
2620	case 6: /* CPR requested */	2617	case 6: /* CPR requested */
2621	rxvt_scr_report_position(aR);	2618	rxvt_scr_report_position(aR);
2622	break;	2619	break;
2623	#if defined (ENABLE_DISPLAY_ANSWER)	2620	#if defined (ENABLE_DISPLAY_ANSWER)
2624	case 7: /* unofficial extension */	2621	case 7: /* unofficial extension */
2625	rxvt_tt_printf(aR_ "%-.250s\n", R->rs[Rs_display_name]);	2622	R->tt_printf("%-.250s\n", R->rs[Rs_display_name]);
2626	break;	2623	break;
2627	#endif	2624	#endif
2628	case 8: /* unofficial extension */	2625	case 8: /* unofficial extension */
2629	rxvt_xterm_seq(aR_ XTerm_title, APL_NAME "-" VERSION, CHAR_ST);	2626	rxvt_xterm_seq(aR_ XTerm_title, APL_NAME "-" VERSION, CHAR_ST);
2630	break;	2627	break;
…		…
2699	break;	2696	break;
2700	#endif	2697	#endif
2701		2698
2702	case CSI_78: /* DECREQTPARM */	2699	case CSI_78: /* DECREQTPARM */
2703	if (arg[0] == 0 || arg[0] == 1)	2700	if (arg[0] == 0 || arg[0] == 1)
2704	rxvt_tt_printf(aR_ "\033[%d;1;1;112;112;1;0x", arg[0] + 2);	2701	R->tt_printf("\033[%d;1;1;112;112;1;0x", arg[0] + 2);
2705	/* FALLTHROUGH */	2702	/* FALLTHROUGH */
2706		2703
2707	default:	2704	default:
2708	break;	2705	break;
2709	}	2706	}
…		…
2763	/*	2760	/*
2764	* reports - some output format copied from XTerm	2761	* reports - some output format copied from XTerm
2765	*/	2762	*/
2766	case 11: /* report window state */	2763	case 11: /* report window state */
2767	XGetWindowAttributes(R->Xdisplay, R->TermWin.parent[0], &wattr);	2764	XGetWindowAttributes(R->Xdisplay, R->TermWin.parent[0], &wattr);
2768	rxvt_tt_printf(aR_ "\033[%dt", wattr.map_state == IsViewable ? 1 : 2);	2765	R->tt_printf("\033[%dt", wattr.map_state == IsViewable ? 1 : 2);
2769	break;	2766	break;
2770	case 13: /* report window position */	2767	case 13: /* report window position */
2771	XGetWindowAttributes(R->Xdisplay, R->TermWin.parent[0], &wattr);	2768	XGetWindowAttributes(R->Xdisplay, R->TermWin.parent[0], &wattr);
2772	XTranslateCoordinates(R->Xdisplay, R->TermWin.parent[0], wattr.root,	2769	XTranslateCoordinates(R->Xdisplay, R->TermWin.parent[0], wattr.root,
2773	-wattr.border_width, -wattr.border_width,	2770	-wattr.border_width, -wattr.border_width,
2774	&x, &y, &wdummy);	2771	&x, &y, &wdummy);
2775	rxvt_tt_printf(aR_ "\033[3;%d;%dt", x, y);	2772	R->tt_printf("\033[3;%d;%dt", x, y);
2776	break;	2773	break;
2777	case 14: /* report window size (pixels) */	2774	case 14: /* report window size (pixels) */
2778	XGetWindowAttributes(R->Xdisplay, R->TermWin.parent[0], &wattr);	2775	XGetWindowAttributes(R->Xdisplay, R->TermWin.parent[0], &wattr);
2779	rxvt_tt_printf(aR_ "\033[4;%d;%dt", wattr.height, wattr.width);	2776	R->tt_printf("\033[4;%d;%dt", wattr.height, wattr.width);
2780	break;	2777	break;
2781	case 18: /* report window size (chars) */	2778	case 18: /* report window size (chars) */
2782	rxvt_tt_printf(aR_ "\033[8;%d;%dt", R->TermWin.nrow, R->TermWin.ncol);	2779	R->tt_printf("\033[8;%d;%dt", R->TermWin.nrow, R->TermWin.ncol);
2783	break;	2780	break;
2784	#if 0 /* XXX: currently disabled due to security concerns */	2781	#if 0 /* XXX: currently disabled due to security concerns */
2785	case 20: /* report icon label */	2782	case 20: /* report icon label */
2786	XGetIconName(R->Xdisplay, R->TermWin.parent[0], &s);	2783	XGetIconName(R->Xdisplay, R->TermWin.parent[0], &s);
2787	rxvt_tt_printf(aR_ "\033]L%-.200s\234", s ? s : ""); /* 8bit ST */	2784	R->tt_printf("\033]L%-.200s\234", s ? s : ""); /* 8bit ST */
2788	break;	2785	break;
2789	case 21: /* report window title */	2786	case 21: /* report window title */
2790	XFetchName(R->Xdisplay, R->TermWin.parent[0], &s);	2787	XFetchName(R->Xdisplay, R->TermWin.parent[0], &s);
2791	rxvt_tt_printf(aR_ "\033]l%-.200s\234", s ? s : ""); /* 8bit ST */	2788	R->tt_printf("\033]l%-.200s\234", s ? s : ""); /* 8bit ST */
2792	break;	2789	break;
2793	#endif	2790	#endif
2794	}	2791	}
2795	}	2792	}
2796	#endif	2793	#endif
…		…
3339	{	3336	{
3340	unsigned char ch, cmd = rxvt_cmd_getc(aR);	3337	unsigned char ch, cmd = rxvt_cmd_getc(aR);
3341		3338
3342	#ifndef RXVT_GRAPHICS	3339	#ifndef RXVT_GRAPHICS
3343	if (cmd == 'Q') { /* query graphics */	3340	if (cmd == 'Q') { /* query graphics */
3344	rxvt_tt_printf(aR_ "\033G0\n"); /* no graphics */	3341	R->tt_printf("\033G0\n"); /* no graphics */
3345	return;	3342	return;
3346	}	3343	}
3347	/* swallow other graphics sequences until terminating ':' */	3344	/* swallow other graphics sequences until terminating ':' */
3348	do	3345	do
3349	ch = rxvt_cmd_getc(aR);	3346	ch = rxvt_cmd_getc(aR);
…		…
3352	unsigned int nargs;	3349	unsigned int nargs;
3353	int args[NGRX_PTS];	3350	int args[NGRX_PTS];
3354	unsigned char *text = NULL;	3351	unsigned char *text = NULL;
3355		3352
3356	if (cmd == 'Q') { /* query graphics */	3353	if (cmd == 'Q') { /* query graphics */
3357	rxvt_tt_printf(aR_ "\033G1\n"); /* yes, graphics (color) */	3354	R->tt_printf("\033G1\n"); /* yes, graphics (color) */
3358	return;	3355	return;
3359	}	3356	}
3360	for (nargs = 0; nargs < (sizeof(args) / sizeof(args[0])) - 1;) {	3357	for (nargs = 0; nargs < (sizeof(args) / sizeof(args[0])) - 1;) {
3361	int neg;	3358	int neg;
3362		3359
…		…
3377	}	3374	}
3378		3375
3379	if ((cmd == 'T') && (nargs >= 5)) {	3376	if ((cmd == 'T') && (nargs >= 5)) {
3380	int i, len = args[4];	3377	int i, len = args[4];
3381		3378
3382	text = rxvt_malloc((len + 1) * sizeof(char));	3379	text = (unsigned char *)rxvt_malloc((len + 1) * sizeof(char));
3383		3380
3384	if (text != NULL) {	3381	if (text != NULL) {
3385	for (i = 0; i < len; i++)	3382	for (i = 0; i < len; i++)
3386	text[i] = rxvt_cmd_getc(aR);	3383	text[i] = rxvt_cmd_getc(aR);
3387	text[len] = '\0';	3384	text[len] = '\0';
…		…
3392	}	3389	}
3393	/*}}} */	3390	/*}}} */
3394		3391
3395	/* ------------------------------------------------------------------------- */	3392	/* ------------------------------------------------------------------------- */
3396		3393
3397	/*{{{ Read and process output from the application */
3398	/* LIBPROTO */
3399	void
3400	rxvt_main_loop(pR)
3401	{
3402	uint32_t ch, *str, buf[BUFSIZ];
3403	int nlines, refreshnow;
3404
3405	R->cmdbuf_ptr = R->cmdbuf_endp = R->cmdbuf_base;
3406
3407	/* once we know the shell is running, send the screen size. Again! */
3408	ch = rxvt_cmd_getc(aR); /* wait for something */
3409	rxvt_tt_winsize(R->cmd_fd, R->TermWin.ncol, R->TermWin.nrow, R->cmd_pid);
3410
3411	refreshnow = 0;
3412	for (;;) {
3413	if (ch == NOCHAR)
3414	ch = rxvt_cmd_getc(aR);
3415
3416	if (ch >= ' ' || ch == '\t' || ch == '\n' || ch == '\r')
3417	{
3418	/* Read a text string from the input buffer */
3419	nlines = 0;
3420	str = buf;
3421	*str++ = ch;
3422	for (;;)
3423	{
3424	ch = next_char (aR);
3425
3426	if (ch == NOCHAR || (ch < ' ' && ch != '\t' && ch != '\n' && ch != '\r'))
3427	break;
3428	else
3429	{
3430	*str++ = ch;
3431
3432	if (ch == '\n')
3433	{
3434	nlines++;
3435	R->refresh_count++;
3436	if (!(R->Options & Opt_jumpScroll)
3437	|| (R->refresh_count >= (R->refresh_limit
3438	* (R->TermWin.nrow - 1))))
3439	{
3440	refreshnow = 1;
3441	ch = NOCHAR;
3442	break;
3443	}
3444	}
3445
3446	if (str >= buf + BUFSIZ)
3447	{
3448	ch = NOCHAR;
3449	break;
3450	}
3451	}
3452	}
3453
3454	rxvt_scr_add_lines(aR_ buf, nlines, str - buf);
3455
3456	/*
3457	* If there have been a lot of new lines, then update the screen
3458	* What the heck I'll cheat and only refresh less than every page-full.
3459	* the number of pages between refreshes is R->refresh_limit, which
3460	* is incremented here because we must be doing flat-out scrolling.
3461	*
3462	* refreshing should be correct for small scrolls, because of the
3463	* time-out
3464	*/
3465
3466	//TODO: REFRESH_PERIOD is one, fix it
3467	if (refreshnow)
3468	{
3469	refreshnow = 0;
3470
3471	if ((R->Options & Opt_jumpScroll) && R->refresh_limit < REFRESH_PERIOD)
3472	R->refresh_limit++;
3473
3474	rxvt_scr_refresh(aR_ R->refresh_type);
3475	}
3476
3477	}
3478	else
3479	{
3480	switch (ch)
3481	{
3482	default:
3483	rxvt_process_nonprinting(aR_ ch);
3484	break;
3485	case C0_ESC: /* escape char */
3486	rxvt_process_escape_seq(aR);
3487	break;
3488	/* case 0x9b: */ /* CSI */
3489	/* rxvt_process_csi_seq(aR); */
3490	}
3491
3492	ch = NOCHAR;
3493	}
3494	}
3495	/* NOTREACHED */
3496	}
3497
3498	/*	3394	/*
3499	* Send printf() formatted output to the command.	3395	* Send printf() formatted output to the command.
3500	* Only use for small amounts of data.	3396	* Only use for small amounts of data.
3501	*/	3397	*/
3502	/* EXTPROTO */
3503	void	3398	void
3504	rxvt_tt_printf(pR_ const char *fmt,...)	3399	rxvt_term::tt_printf (const char *fmt,...)
3505	{	3400	{
3506	va_list arg_ptr;	3401	va_list arg_ptr;
3507	unsigned char buf[256];	3402	unsigned char buf[256];
3508		3403
3509	va_start(arg_ptr, fmt);	3404	va_start (arg_ptr, fmt);
3510	vsprintf((char *)buf, fmt, arg_ptr);	3405	vsnprintf ((char *)buf, 256, fmt, arg_ptr);
3511	va_end(arg_ptr);	3406	va_end (arg_ptr);
3512	rxvt_tt_write(aR_ buf, (unsigned int)STRLEN(buf));	3407	tt_write (buf, STRLEN (buf));
3513	}	3408	}
3514		3409
3515	/* ---------------------------------------------------------------------- */	3410	/* ---------------------------------------------------------------------- */
3516	/* Addresses pasting large amounts of data and rxvt hang
3517	* code pinched from xterm (v_write()) and applied originally to
3518	* rxvt-2.18 - Hops
3519	* Write data to the pty as typed by the user, pasted with the mouse,	3411	/* Write data to the pty as typed by the user, pasted with the mouse,
3520	* or generated by us in response to a query ESC sequence.	3412	* or generated by us in response to a query ESC sequence.
3521	*/	3413	*/
3522	/* EXTPROTO */
3523	void	3414	void
3524	rxvt_tt_write(pR_ const unsigned char *d, unsigned int len)	3415	rxvt_term::tt_write (const unsigned char *data, unsigned int len)
3525	{	3416	{
3526	#define MAX_PTY_WRITE 256 /* POSIX minimum MAX_INPUT */	3417	enum { MAX_PTY_WRITE = 255 }; // minimum MAX_INPUT
3527	int riten;
3528	unsigned int p;
3529	unsigned char *v_buffer, /* start of physical buffer */
3530	*v_bufstr, /* start of current buffer pending */
3531	*v_bufptr, /* end of current buffer pending */
3532	*v_bufend; /* end of physical buffer */
3533		3418
3534	if (R->v_bufstr == NULL && len > 0) {	3419	if (len)
3535	p = (len / MAX_PTY_WRITE + 1) * MAX_PTY_WRITE;
3536	v_buffer = v_bufstr = v_bufptr = (unsigned char *)rxvt_malloc(p);
3537	v_bufend = v_buffer + p;
3538	} else {
3539	v_buffer = R->v_buffer;
3540	v_bufstr = R->v_bufstr;
3541	v_bufptr = R->v_bufptr;
3542	v_bufend = R->v_bufend;
3543	}	3420	{
		3421	if (v_buflen == 0)
		3422	{
		3423	int written = write (cmd_fd, data, min (MAX_PTY_WRITE, len));
		3424	if (written == len)
		3425	return;
3544		3426
3545	/*	3427	data += written;
3546	* Append to the block we already have. Always doing this simplifies the	3428	len -= written;
3547	* code, and isn't too bad, either. If this is a short block, it isn't	3429	}
3548	* too expensive, and if this is a long block, we won't be able to write	3430
3549	* it all anyway.	3431
3550	*/	3432	v_buffer = (unsigned char *)realloc (v_buffer, v_buflen + len);
3551	if (len > 0) {	3433
3552	if (v_bufend < v_bufptr + len) { /* run out of room */	3434	memcpy (v_buffer + v_buflen, data, len);
3553	if (v_bufstr != v_buffer) {	3435	v_buflen += len;
3554	/* there is unused space, move everything down */
3555	MEMMOVE(v_buffer, v_bufstr,
3556	(unsigned int)(v_bufptr - v_bufstr));
3557	v_bufptr -= v_bufstr - v_buffer;
3558	v_bufstr = v_buffer;
3559	}	3436	}
3560	if (v_bufend < v_bufptr + len) {
3561	/* still won't fit: get more space */
3562	/* use most basic realloc because an error is not fatal. */
3563	unsigned int size = v_bufptr - v_buffer;
3564	unsigned int reallocto;
3565		3437
3566	reallocto = ((size + len) / MAX_PTY_WRITE + 1) * MAX_PTY_WRITE;	3438	for (;;)
3567	v_buffer = (unsigned char *)realloc(v_buffer, reallocto);	3439	{
3568	/* save across realloc */	3440	int written = write (cmd_fd, v_buffer, min (MAX_PTY_WRITE, v_buflen));
3569	if (v_buffer) {	3441
3570	v_bufstr = v_buffer;	3442	if (written > 0)
3571	v_bufptr = v_buffer + size;	3443	{
3572	v_bufend = v_buffer + reallocto;	3444	v_buflen -= written;
3573	} else { /* no memory: ignore entire write request */	3445
3574	rxvt_print_error("data loss: cannot allocate buffer space");	3446	if (v_buflen == 0)
3575	v_buffer = v_bufstr; /* restore clobbered pointer */	3447	{
3576	}	3448	free (v_buffer);
		3449	v_buffer = 0;
		3450	v_buflen = 0;
		3451
		3452	pty_ev.set (EVENT_READ);
		3453	return;
		3454	}
		3455
		3456	memmove (v_buffer, v_buffer + written, v_buflen);
		3457	}
		3458	else if (written != -1 || (errno != EAGAIN && errno != EINTR))
		3459	// original code just ignores this...
		3460	destroy ();
		3461	else
		3462	{
		3463	pty_ev.set (EVENT_READ | EVENT_WRITE);
		3464	return;
		3465	}
3577	}	3466	}
3578	}
3579	if (v_bufend >= v_bufptr + len) { /* new stuff will fit */
3580	MEMCPY(v_bufptr, d, len);
3581	v_bufptr += len;
3582	}
3583	}
3584
3585	/*
3586	* Write out as much of the buffer as we can.
3587	* Be careful not to overflow the pty's input silo.
3588	* We are conservative here and only write a small amount at a time.
3589	*
3590	* If we can't push all the data into the pty yet, we expect write
3591	* to return a non-negative number less than the length requested
3592	* (if some data written) or -1 and set errno to EAGAIN,
3593	* EWOULDBLOCK, or EINTR (if no data written).
3594	*
3595	* (Not all systems do this, sigh, so the code is actually
3596	* a little more forgiving.)
3597	*/
3598	if ((p = v_bufptr - v_bufstr) > 0) {
3599	riten = write(R->cmd_fd, v_bufstr, min(p, MAX_PTY_WRITE));
3600	if (riten < 0)
3601	riten = 0;
3602	v_bufstr += riten;
3603	if (v_bufstr >= v_bufptr) /* we wrote it all */
3604	v_bufstr = v_bufptr = v_buffer;
3605	}
3606	/*
3607	* If we have lots of unused memory allocated, return it
3608	*/
3609	if (v_bufend - v_bufptr > MAX_PTY_WRITE * 8) { /* arbitrary hysteresis */
3610	/* save pointers across realloc */
3611	unsigned int start = v_bufstr - v_buffer;
3612	unsigned int size = v_bufptr - v_buffer;
3613	unsigned int reallocto;
3614
3615	reallocto = (size / MAX_PTY_WRITE + 1) * MAX_PTY_WRITE;
3616	v_buffer = (unsigned char *)realloc(v_buffer, reallocto);
3617	if (v_buffer) {
3618	v_bufstr = v_buffer + start;
3619	v_bufptr = v_buffer + size;
3620	v_bufend = v_buffer + reallocto;
3621	} else {
3622	/* should we print a warning if couldn't return memory? */
3623	v_buffer = v_bufstr - start; /* restore clobbered pointer */
3624	}
3625	}
3626	R->v_buffer = v_buffer;
3627	R->v_bufstr = v_bufstr;
3628	R->v_bufptr = v_bufptr;
3629	R->v_bufend = v_bufend;
3630	}	3467	}
		3468
3631	/*----------------------- end-of-file (C source) -----------------------*/	3469	/*----------------------- end-of-file (C source) -----------------------*/
3632		3470

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