aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/programs/xterm/resize.c
blob: 67cdd6e57dd7d35d80211e708429ba53f3001efc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
/* $XTermId: resize.c,v 1.97 2005/11/13 23:10:36 tom Exp $ */

/*
 *	$Xorg: resize.c,v 1.3 2000/08/17 19:55:09 cpqbld Exp $
 */

/* $XFree86: xc/programs/xterm/resize.c,v 3.60 2005/11/13 23:10:36 dickey Exp $ */

/*
 * Copyright 2003-2004,2005 by Thomas E. Dickey
 *
 *                         All Rights Reserved
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name(s) of the above copyright
 * holders shall not be used in advertising or otherwise to promote the
 * sale, use or other dealings in this Software without prior written
 * authorization.
 *
 *
 * Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
 *
 *                         All Rights Reserved
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted,
 * provided that the above copyright notice appear in all copies and that
 * both that copyright notice and this permission notice appear in
 * supporting documentation, and that the name of Digital Equipment
 * Corporation not be used in advertising or publicity pertaining to
 * distribution of the software without specific, written prior permission.
 *
 *
 * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
 * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
 * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

/* resize.c */

#include <xterm.h>
#include <stdio.h>
#include <ctype.h>
#include <xstrings.h>
#include <xterm_io.h>

#ifdef APOLLO_SR9
#define CANT_OPEN_DEV_TTY
#endif

#ifndef USE_TERMINFO		/* avoid conflict with configure script */
#if defined(__QNX__) || defined(__SCO__) || defined(linux) || defined(__OpenBSD__) || defined(__UNIXWARE__)
#define USE_TERMINFO
#endif
#endif

#if defined(__QNX__)
#include <unix.h>
#endif

/*
 * Some OS's may want to use both, like SCO for example.  We catch here anyone
 * who hasn't decided what they want.
 */
#if !defined(USE_TERMCAP) && !defined(USE_TERMINFO)
#define USE_TERMINFO
#endif

#include <signal.h>
#include <pwd.h>

#ifdef X_NOT_POSIX
#if !defined(SYSV) && !defined(i386)
extern struct passwd *getpwuid();	/* does ANYBODY need this? */
#endif /* SYSV && i386 */
#endif /* X_NOT_POSIX */

#ifndef bzero
#define	bzero(s, n)	memset(s, 0, n)
#endif

#ifdef __MVS__
#define ESCAPE(string) "\047" string
#else
#define ESCAPE(string) "\033" string
#endif

#define	EMULATIONS	2
#define	SUN		1
#define	VT100		0

#define	TIMEOUT		10

#define	SHELL_UNKNOWN	0
#define	SHELL_C		1
#define	SHELL_BOURNE	2
/* *INDENT-OFF* */
static struct {
    char *name;
    int type;
} shell_list[] = {
    { "csh",	SHELL_C },	/* vanilla cshell */
    { "tcsh",   SHELL_C },
    { "jcsh",   SHELL_C },
    { "sh",	SHELL_BOURNE }, /* vanilla Bourne shell */
    { "ksh",	SHELL_BOURNE }, /* Korn shell (from AT&T toolchest) */
    { "ksh-i",	SHELL_BOURNE }, /* other name for latest Korn shell */
    { "bash",	SHELL_BOURNE }, /* GNU Bourne again shell */
    { "jsh",    SHELL_BOURNE },
    { NULL,	SHELL_BOURNE }	/* default (same as xterm's) */
};
/* *INDENT-ON* */

static char *emuname[EMULATIONS] =
{
    "VT100",
    "Sun",
};
static char *myname;
static int shell_type = SHELL_UNKNOWN;
static char *getsize[EMULATIONS] =
{
    ESCAPE("7") ESCAPE("[r") ESCAPE("[999;999H") ESCAPE("[6n"),
    ESCAPE("[18t"),
};
#if defined(USE_STRUCT_TTYSIZE)
#elif defined(USE_STRUCT_WINSIZE)
static char *getwsize[EMULATIONS] =
{				/* size in pixels */
    0,
    ESCAPE("[14t"),
};
#endif /* USE_STRUCT_{TTYSIZE|WINSIZE} */
static char *restore[EMULATIONS] =
{
    ESCAPE("8"),
    0,
};
static char *setname = "";
static char *setsize[EMULATIONS] =
{
    0,
    ESCAPE("[8;%s;%st"),
};

#ifdef USE_ANY_SYSV_TERMIO
static struct termio tioorig;
#elif defined(USE_TERMIOS)
static struct termios tioorig;
#else
static struct sgttyb sgorig;
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */

static char *size[EMULATIONS] =
{
    ESCAPE("[%d;%dR"),
    ESCAPE("[8;%d;%dt"),
};
static char sunname[] = "sunsize";
static int tty;
static FILE *ttyfp;

#if defined(USE_STRUCT_TTYSIZE)
#elif defined(USE_STRUCT_WINSIZE)
static char *wsize[EMULATIONS] =
{
    0,
    ESCAPE("[4;%hd;%hdt"),
};
#endif /* USE_STRUCT_{TTYSIZE|WINSIZE} */

static SIGNAL_T onintr(int sig);
static SIGNAL_T resize_timeout(int sig);
static int checkdigits(char *str);
static void Usage(void);
static void readstring(FILE *fp, char *buf, char *str);

#undef US			/* may conflict with curses.h */

#ifdef USE_TERMCAP
#ifdef HAVE_TERMCAP_H
#include <termcap.h>
#if defined(NCURSES_VERSION)
	/* The tgetent emulation function in SVr4-style curses implementations
	 * (e.g., ncurses) ignores the buffer, so TERMCAP can't be set from it.
	 * Instead, just use terminfo.
	 */
#undef USE_TERMCAP
#include <curses.h>
#endif
#else
#undef ERR			/* workaround for glibc 2.1.3 */
#include <curses.h>
#ifdef NCURSES_VERSION
#ifdef HAVE_NCURSES_TERM_H
#include <ncurses/term.h>
#else
#include <term.h>		/* tgetent() */
#endif /*CYGWIN */
#endif
#endif /* HAVE_TERMCAP_H  */
#endif

#define TERMCAP_SIZE 1500	/* 1023 is standard; 'screen' exceeds */

#ifdef USE_TERMCAP
static void
print_termcap(const char *termcap)
{
    int ch;

    putchar('\'');
    while ((ch = *termcap++) != '\0') {
	switch (ch & 0xff) {
	case 127:		/* undo bug in GNU termcap */
	    printf("^?");
	    break;
	case '\'':		/* must escape anyway (unlikely) */
	    /* FALLTHRU */
	case '!':		/* must escape for SunOS csh */
	    putchar('\\');
	    /* FALLTHRU */
	default:
	    putchar(ch);
	    break;
	}
    }
    putchar('\'');
}
#endif /* USE_TERMCAP */

/*
   resets termcap string to reflect current screen size
 */
int
main(int argc, char **argv ENVP_ARG)
{
    register char *ptr, *env;
    register int emu = VT100;
    char *shell;
    struct passwd *pw;
    int i;
    int rows, cols;
#ifdef USE_ANY_SYSV_TERMIO
    struct termio tio;
#elif defined(USE_TERMIOS)
    struct termios tio;
#else
    struct sgttyb sg;
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
#ifdef USE_TERMCAP
    int ok_tcap = 1;
    char termcap[TERMCAP_SIZE];
    char newtc[TERMCAP_SIZE];
#endif /* USE_TERMCAP */
    char buf[BUFSIZ];
#ifdef TTYSIZE_STRUCT
    TTYSIZE_STRUCT ts;
#endif
    char *name_of_tty;
#ifdef CANT_OPEN_DEV_TTY
    extern char *ttyname();
#endif

    myname = x_basename(argv[0]);
    if (strcmp(myname, sunname) == 0)
	emu = SUN;
    for (argv++, argc--; argc > 0 && **argv == '-'; argv++, argc--) {
	switch ((*argv)[1]) {
	case 's':		/* Sun emulation */
	    if (emu == SUN)
		Usage();	/* Never returns */
	    emu = SUN;
	    break;
	case 'u':		/* Bourne (Unix) shell */
	    shell_type = SHELL_BOURNE;
	    break;
	case 'c':		/* C shell */
	    shell_type = SHELL_C;
	    break;
	default:
	    Usage();		/* Never returns */
	}
    }

    if (SHELL_UNKNOWN == shell_type) {
	/* Find out what kind of shell this user is running.
	 * This is the same algorithm that xterm uses.
	 */
	if (((ptr = getenv("SHELL")) == NULL || *ptr == 0) &&
	    (((pw = getpwuid(getuid())) == NULL) ||
	     *(ptr = pw->pw_shell) == 0))
	    /* this is the same default that xterm uses */
	    ptr = "/bin/sh";

	shell = x_basename(ptr);

	/* now that we know, what kind is it? */
	for (i = 0; shell_list[i].name; i++)
	    if (!strcmp(shell_list[i].name, shell))
		break;
	shell_type = shell_list[i].type;
    }

    if (argc == 2) {
	if (!setsize[emu]) {
	    fprintf(stderr,
		    "%s: Can't set window size under %s emulation\n",
		    myname, emuname[emu]);
	    exit(1);
	}
	if (!checkdigits(argv[0]) || !checkdigits(argv[1]))
	    Usage();		/* Never returns */
    } else if (argc != 0)
	Usage();		/* Never returns */

#ifdef CANT_OPEN_DEV_TTY
    if ((name_of_tty = ttyname(fileno(stderr))) == NULL)
#endif
	name_of_tty = "/dev/tty";

    if ((ttyfp = fopen(name_of_tty, "r+")) == NULL) {
	fprintf(stderr, "%s:  can't open terminal %s\n",
		myname, name_of_tty);
	exit(1);
    }
    tty = fileno(ttyfp);
#ifdef USE_TERMCAP
    if (!(env = getenv("TERM")) || !*env) {
	env = DFT_TERMTYPE;
	if (SHELL_BOURNE == shell_type)
	    setname = "TERM=xterm;\nexport TERM;\n";
	else
	    setname = "setenv TERM xterm;\n";
    }
    termcap[0] = 0;		/* ...just in case we've accidentally gotten terminfo */
    if (tgetent(termcap, env) <= 0 || termcap[0] == 0)
	ok_tcap = 0;
#endif /* USE_TERMCAP */
#ifdef USE_TERMINFO
    if (!(env = getenv("TERM")) || !*env) {
	env = DFT_TERMTYPE;
	if (SHELL_BOURNE == shell_type)
	    setname = "TERM=xterm;\nexport TERM;\n";
	else
	    setname = "setenv TERM xterm;\n";
    }
#endif /* USE_TERMINFO */

#ifdef USE_ANY_SYSV_TERMIO
    ioctl(tty, TCGETA, &tioorig);
    tio = tioorig;
    tio.c_iflag &= ~(ICRNL | IUCLC);
    tio.c_lflag &= ~(ICANON | ECHO);
    tio.c_cflag |= CS8;
    tio.c_cc[VMIN] = 6;
    tio.c_cc[VTIME] = 1;
#elif defined(USE_TERMIOS)
    tcgetattr(tty, &tioorig);
    tio = tioorig;
    tio.c_iflag &= ~ICRNL;
    tio.c_lflag &= ~(ICANON | ECHO);
    tio.c_cflag |= CS8;
    tio.c_cc[VMIN] = 6;
    tio.c_cc[VTIME] = 1;
#else /* not USE_TERMIOS */
    ioctl(tty, TIOCGETP, &sgorig);
    sg = sgorig;
    sg.sg_flags |= RAW;
    sg.sg_flags &= ~ECHO;
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
    signal(SIGINT, onintr);
    signal(SIGQUIT, onintr);
    signal(SIGTERM, onintr);
#ifdef USE_ANY_SYSV_TERMIO
    ioctl(tty, TCSETAW, &tio);
#elif defined(USE_TERMIOS)
    tcsetattr(tty, TCSADRAIN, &tio);
#else /* not USE_TERMIOS */
    ioctl(tty, TIOCSETP, &sg);
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */

    if (argc == 2) {
	sprintf(buf, setsize[emu], argv[0], argv[1]);
	write(tty, buf, strlen(buf));
    }
    write(tty, getsize[emu], strlen(getsize[emu]));
    readstring(ttyfp, buf, size[emu]);
    if (sscanf(buf, size[emu], &rows, &cols) != 2) {
	fprintf(stderr, "%s: Can't get rows and columns\r\n", myname);
	onintr(0);
    }
    if (restore[emu])
	write(tty, restore[emu], strlen(restore[emu]));
#if defined(USE_STRUCT_TTYSIZE)
    /* finally, set the tty's window size */
    if (ioctl(tty, TIOCGSIZE, &ts) != -1) {
	TTYSIZE_ROWS(ts) = rows;
	TTYSIZE_COLS(ts) = cols;
	SET_TTYSIZE(tty, ts);
    }
#elif defined(USE_STRUCT_WINSIZE)
    /* finally, set the tty's window size */
    if (getwsize[emu]) {
	/* get the window size in pixels */
	write(tty, getwsize[emu], strlen(getwsize[emu]));
	readstring(ttyfp, buf, wsize[emu]);
	if (sscanf(buf, wsize[emu], &ts.ws_xpixel, &ts.ws_ypixel) != 2) {
	    fprintf(stderr, "%s: Can't get window size\r\n", myname);
	    onintr(0);
	}
	TTYSIZE_ROWS(ts) = rows;
	TTYSIZE_COLS(ts) = cols;
	SET_TTYSIZE(tty, ts);
    } else if (ioctl(tty, TIOCGWINSZ, &ts) != -1) {
	/* we don't have any way of directly finding out
	   the current height & width of the window in pixels.  We try
	   our best by computing the font height and width from the "old"
	   window-size values, and multiplying by these ratios... */
	if (TTYSIZE_COLS(ts) != 0)
	    ts.ws_xpixel = cols * (ts.ws_xpixel / TTYSIZE_COLS(ts));
	if (TTYSIZE_ROWS(ts) != 0)
	    ts.ws_ypixel = rows * (ts.ws_ypixel / TTYSIZE_ROWS(ts));
	TTYSIZE_ROWS(ts) = rows;
	TTYSIZE_COLS(ts) = cols;
	SET_TTYSIZE(tty, ts);
    }
#endif /* USE_STRUCT_{TTYSIZE|WINSIZE} */

#ifdef USE_ANY_SYSV_TERMIO
    ioctl(tty, TCSETAW, &tioorig);
#elif defined(USE_TERMIOS)
    tcsetattr(tty, TCSADRAIN, &tioorig);
#else /* not USE_TERMIOS */
    ioctl(tty, TIOCSETP, &sgorig);
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
    signal(SIGINT, SIG_DFL);
    signal(SIGQUIT, SIG_DFL);
    signal(SIGTERM, SIG_DFL);

#ifdef USE_TERMCAP
    if (ok_tcap) {
	/* update termcap string */
	/* first do columns */
	if ((ptr = x_strindex(termcap, "co#")) == NULL) {
	    fprintf(stderr, "%s: No `co#'\n", myname);
	    exit(1);
	}

	i = ptr - termcap + 3;
	strncpy(newtc, termcap, (unsigned) i);
	sprintf(newtc + i, "%d", cols);
	ptr = strchr(ptr, ':');
	strcat(newtc, ptr);

	/* now do lines */
	if ((ptr = x_strindex(newtc, "li#")) == NULL) {
	    fprintf(stderr, "%s: No `li#'\n", myname);
	    exit(1);
	}

	i = ptr - newtc + 3;
	strncpy(termcap, newtc, (unsigned) i);
	sprintf(termcap + i, "%d", rows);
	ptr = strchr(ptr, ':');
	strcat(termcap, ptr);
    }
#endif /* USE_TERMCAP */

    if (SHELL_BOURNE == shell_type) {

#ifdef USE_TERMCAP
	if (ok_tcap) {
	    printf("%sTERMCAP=", setname);
	    print_termcap(termcap);
	    printf(";\nexport TERMCAP;\n");
	}
#endif /* USE_TERMCAP */
#ifdef USE_TERMINFO
	printf("%sCOLUMNS=%d;\nLINES=%d;\nexport COLUMNS LINES;\n",
	       setname, cols, rows);
#endif /* USE_TERMINFO */

    } else {			/* not Bourne shell */

#ifdef USE_TERMCAP
	if (ok_tcap) {
	    printf("set noglob;\n%ssetenv TERMCAP ", setname);
	    print_termcap(termcap);
	    printf(";\nunset noglob;\n");
	}
#endif /* USE_TERMCAP */
#ifdef USE_TERMINFO
	printf("set noglob;\n%ssetenv COLUMNS '%d';\nsetenv LINES '%d';\nunset noglob;\n",
	       setname, cols, rows);
#endif /* USE_TERMINFO */
    }
    exit(0);
}

static int
checkdigits(register char *str)
{
    while (*str) {
	if (!isdigit(CharOf(*str)))
	    return (0);
	str++;
    }
    return (1);
}

static void
readstring(register FILE *fp, register char *buf, char *str)
{
    register int last, c;
#if !defined(USG) && !defined(__UNIXOS2__)
    /* What is the advantage of setitimer() over alarm()? */
    struct itimerval it;
#endif

    signal(SIGALRM, resize_timeout);
#if defined(USG) || defined(__UNIXOS2__)
    alarm(TIMEOUT);
#else
    bzero((char *) &it, sizeof(struct itimerval));
    it.it_value.tv_sec = TIMEOUT;
    setitimer(ITIMER_REAL, &it, (struct itimerval *) NULL);
#endif
    if ((c = getc(fp)) == 0233) {	/* meta-escape, CSI */
	*buf++ = c = ESCAPE("")[0];
	*buf++ = '[';
    } else {
	*buf++ = c;
    }
    if (c != *str) {
	fprintf(stderr, "%s: unknown character, exiting.\r\n", myname);
	onintr(0);
    }
    last = str[strlen(str) - 1];
    while ((*buf++ = getc(fp)) != last) ;
#if defined(USG) || defined(__UNIXOS2__)
    alarm(0);
#else
    bzero((char *) &it, sizeof(struct itimerval));
    setitimer(ITIMER_REAL, &it, (struct itimerval *) NULL);
#endif
    *buf = 0;
}

static void
Usage(void)
{
    fprintf(stderr, strcmp(myname, sunname) == 0 ?
	    "Usage: %s [rows cols]\n" :
	    "Usage: %s [-u] [-c] [-s [rows cols]]\n", myname);
    exit(1);
}

static SIGNAL_T
resize_timeout(int sig)
{
    fprintf(stderr, "\n%s: Time out occurred\r\n", myname);
    onintr(sig);
}

/* ARGSUSED */
static SIGNAL_T
onintr(int sig GCC_UNUSED)
{
#ifdef USE_ANY_SYSV_TERMIO
    ioctl(tty, TCSETAW, &tioorig);
#elif defined(USE_TERMIOS)
    tcsetattr(tty, TCSADRAIN, &tioorig);
#else /* not USE_TERMIOS */
    ioctl(tty, TIOCSETP, &sgorig);
#endif /* USE_ANY_SYSV_TERMIO/USE_TERMIOS */
    exit(1);
}