1 /*-
2 * Copyright (c) 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1993, 1994, 1995, 1996
5 * Keith Bostic. All rights reserved.
6 *
7 * See the LICENSE file for redistribution information.
8 */
9
10 #include "config.h"
11
12 #include <sys/types.h>
13 #include <sys/ioctl.h>
14 #include <sys/queue.h>
15 #include <sys/stat.h>
16
17 #include <bitstring.h>
18 #include <errno.h>
19 #include <limits.h>
20 #include <signal.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #ifdef HAVE_TERM_H
25 #include <term.h>
26 #endif
27 #include <termios.h>
28 #include <unistd.h>
29
30 #include "../common/common.h"
31 #include "cl.h"
32
33 static int cl_pfmap(SCR *, seq_t, CHAR_T *, size_t, CHAR_T *, size_t);
34 static size_t atoz_or(const char *, size_t);
35
36 /*
37 * XXX
38 * THIS REQUIRES THAT ALL SCREENS SHARE A TERMINAL TYPE.
39 */
40 typedef struct _tklist {
41 char *ts; /* Key's termcap string. */
42 char *output; /* Corresponding vi command. */
43 char *name; /* Name. */
44 u_char value; /* Special value (for lookup). */
45 } TKLIST;
46 static TKLIST const c_tklist[] = { /* Command mappings. */
47 {"kil1", "O", "insert line"},
48 {"kdch1", "x", "delete character"},
49 {"kcud1", "j", "cursor down"},
50 {"kel", "D", "delete to eol"},
51 {"kind", "\004", "scroll down"}, /* ^D */
52 {"kll", "$", "go to eol"},
53 {"kend", "$", "go to eol"},
54 {"khome", "^", "go to sol"},
55 {"kich1", "i", "insert at cursor"},
56 {"kdl1", "dd", "delete line"},
57 {"kcub1", "h", "cursor left"},
58 {"knp", "\006", "page down"}, /* ^F */
59 {"kpp", "\002", "page up"}, /* ^B */
60 {"kri", "\025", "scroll up"}, /* ^U */
61 {"ked", "dG", "delete to end of screen"},
62 {"kcuf1", "l", "cursor right"},
63 {"kcuu1", "k", "cursor up"},
64 {NULL},
65 };
66 static TKLIST const m1_tklist[] = { /* Input mappings (lookup). */
67 {NULL},
68 };
69 static TKLIST const m2_tklist[] = { /* Input mappings (set or delete). */
70 {"kcud1", "\033ja", "cursor down"}, /* ^[ja */
71 {"kcub1", "\033ha", "cursor left"}, /* ^[ha */
72 {"kcuu1", "\033ka", "cursor up"}, /* ^[ka */
73 {"kcuf1", "\033la", "cursor right"}, /* ^[la */
74 {NULL},
75 };
76
77 /*
78 * cl_term_init --
79 * Initialize the special keys defined by the termcap/terminfo entry.
80 *
81 * PUBLIC: int cl_term_init(SCR *);
82 */
83 int
cl_term_init(SCR * sp)84 cl_term_init(SCR *sp)
85 {
86 KEYLIST *kp;
87 SEQ *qp;
88 TKLIST const *tkp;
89 char *t;
90 CHAR_T name[60];
91 CHAR_T output[5];
92 CHAR_T ts[20];
93 CHAR_T *wp;
94 size_t wlen;
95
96 /* Command mappings. */
97 for (tkp = c_tklist; tkp->name != NULL; ++tkp) {
98 if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
99 continue;
100 CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
101 MEMCPY(name, wp, wlen);
102 CHAR2INT(sp, t, strlen(t), wp, wlen);
103 MEMCPY(ts, wp, wlen);
104 CHAR2INT(sp, tkp->output, strlen(tkp->output), wp, wlen);
105 MEMCPY(output, wp, wlen);
106 if (seq_set(sp, name, strlen(tkp->name), ts, strlen(t),
107 output, strlen(tkp->output), SEQ_COMMAND,
108 SEQ_NOOVERWRITE | SEQ_SCREEN))
109 return (1);
110 }
111
112 /* Input mappings needing to be looked up. */
113 for (tkp = m1_tklist; tkp->name != NULL; ++tkp) {
114 if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
115 continue;
116 for (kp = keylist;; ++kp)
117 if (kp->value == tkp->value)
118 break;
119 if (kp == NULL)
120 continue;
121 CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
122 MEMCPY(name, wp, wlen);
123 CHAR2INT(sp, t, strlen(t), wp, wlen);
124 MEMCPY(ts, wp, wlen);
125 output[0] = (UCHAR_T)kp->ch;
126 if (seq_set(sp, name, strlen(tkp->name), ts, strlen(t),
127 output, 1, SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
128 return (1);
129 }
130
131 /* Input mappings that are already set or are text deletions. */
132 for (tkp = m2_tklist; tkp->name != NULL; ++tkp) {
133 if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
134 continue;
135 /*
136 * !!!
137 * Some terminals' <cursor_left> keys send single <backspace>
138 * characters. This is okay in command mapping, but not okay
139 * in input mapping. That combination is the only one we'll
140 * ever see, hopefully, so kluge it here for now.
141 */
142 if (!strcmp(t, "\b"))
143 continue;
144 if (tkp->output == NULL) {
145 CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
146 MEMCPY(name, wp, wlen);
147 CHAR2INT(sp, t, strlen(t), wp, wlen);
148 MEMCPY(ts, wp, wlen);
149 if (seq_set(sp, name, strlen(tkp->name),
150 ts, strlen(t), NULL, 0,
151 SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
152 return (1);
153 } else {
154 CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
155 MEMCPY(name, wp, wlen);
156 CHAR2INT(sp, t, strlen(t), wp, wlen);
157 MEMCPY(ts, wp, wlen);
158 CHAR2INT(sp, tkp->output, strlen(tkp->output), wp, wlen);
159 MEMCPY(output, wp, wlen);
160 if (seq_set(sp, name, strlen(tkp->name),
161 ts, strlen(t), output, strlen(tkp->output),
162 SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
163 return (1);
164 }
165 }
166
167 /*
168 * Rework any function key mappings that were set before the
169 * screen was initialized.
170 */
171 SLIST_FOREACH(qp, sp->gp->seqq, q)
172 if (F_ISSET(qp, SEQ_FUNCMAP))
173 (void)cl_pfmap(sp, qp->stype,
174 qp->input, qp->ilen, qp->output, qp->olen);
175 return (0);
176 }
177
178 /*
179 * cl_term_end --
180 * End the special keys defined by the termcap/terminfo entry.
181 *
182 * PUBLIC: int cl_term_end(GS *);
183 */
184 int
cl_term_end(GS * gp)185 cl_term_end(GS *gp)
186 {
187 SEQ *qp, *nqp, *pre_qp = NULL;
188
189 /* Delete screen specific mappings. */
190 SLIST_FOREACH_MUTABLE(qp, gp->seqq, q, nqp)
191 if (F_ISSET(qp, SEQ_SCREEN)) {
192 if (qp == SLIST_FIRST(gp->seqq))
193 SLIST_REMOVE_HEAD(gp->seqq, q);
194 else
195 SLIST_REMOVE_AFTER(pre_qp, q);
196 (void)seq_free(qp);
197 } else
198 pre_qp = qp;
199 return (0);
200 }
201
202 /*
203 * cl_fmap --
204 * Map a function key.
205 *
206 * PUBLIC: int cl_fmap(SCR *, seq_t, CHAR_T *, size_t, CHAR_T *, size_t);
207 */
208 int
cl_fmap(SCR * sp,seq_t stype,CHAR_T * from,size_t flen,CHAR_T * to,size_t tlen)209 cl_fmap(SCR *sp, seq_t stype, CHAR_T *from, size_t flen, CHAR_T *to, size_t tlen)
210 {
211 /* Ignore until the screen is running, do the real work then. */
212 if (F_ISSET(sp, SC_VI) && !F_ISSET(sp, SC_SCR_VI))
213 return (0);
214 if (F_ISSET(sp, SC_EX) && !F_ISSET(sp, SC_SCR_EX))
215 return (0);
216
217 return (cl_pfmap(sp, stype, from, flen, to, tlen));
218 }
219
220 /*
221 * cl_pfmap --
222 * Map a function key (private version).
223 */
224 static int
cl_pfmap(SCR * sp,seq_t stype,CHAR_T * from,size_t flen,CHAR_T * to,size_t tlen)225 cl_pfmap(SCR *sp, seq_t stype, CHAR_T *from, size_t flen, CHAR_T *to, size_t tlen)
226 {
227 size_t nlen;
228 char *p;
229 char name[64];
230 CHAR_T keyname[64];
231 CHAR_T ts[20];
232 CHAR_T *wp;
233 size_t wlen;
234
235 (void)snprintf(name, sizeof(name), "kf%d",
236 (int)STRTOL(from+1,NULL,10));
237 if ((p = tigetstr(name)) == NULL ||
238 p == (char *)-1 || strlen(p) == 0)
239 p = NULL;
240 if (p == NULL) {
241 msgq_wstr(sp, M_ERR, from, "233|This terminal has no %s key");
242 return (1);
243 }
244
245 nlen = SPRINTF(keyname,
246 SIZE(keyname), L("function key %d"),
247 (int)STRTOL(from+1,NULL,10));
248 CHAR2INT(sp, p, strlen(p), wp, wlen);
249 MEMCPY(ts, wp, wlen);
250 return (seq_set(sp, keyname, nlen,
251 ts, strlen(p), to, tlen, stype, SEQ_NOOVERWRITE | SEQ_SCREEN));
252 }
253
254 /*
255 * cl_optchange --
256 * Curses screen specific "option changed" routine.
257 *
258 * PUBLIC: int cl_optchange(SCR *, int, char *, u_long *);
259 */
260 int
cl_optchange(SCR * sp,int opt,char * str,u_long * valp)261 cl_optchange(SCR *sp, int opt, char *str, u_long *valp)
262 {
263 CL_PRIVATE *clp;
264
265 clp = CLP(sp);
266
267 switch (opt) {
268 case O_TERM:
269 F_CLR(sp, SC_SCR_EX | SC_SCR_VI);
270 /* FALLTHROUGH */
271 case O_COLUMNS:
272 case O_LINES:
273 /*
274 * Changing the terminal type requires that we reinitialize
275 * curses, while resizing does not.
276 */
277 F_SET(sp->gp, G_SRESTART);
278 break;
279 case O_MESG:
280 (void)cl_omesg(sp, clp, *valp);
281 break;
282 case O_WINDOWNAME:
283 if (*valp) {
284 F_SET(clp, CL_RENAME_OK);
285
286 /*
287 * If the screen is live, i.e. we're not reading the
288 * .exrc file, update the window.
289 */
290 if (sp->frp != NULL && sp->frp->name != NULL)
291 (void)cl_rename(sp, sp->frp->name, 1);
292 } else {
293 F_CLR(clp, CL_RENAME_OK);
294
295 (void)cl_rename(sp, NULL, 0);
296 }
297 break;
298 }
299 return (0);
300 }
301
302 /*
303 * cl_omesg --
304 * Turn the tty write permission on or off.
305 *
306 * PUBLIC: int cl_omesg(SCR *, CL_PRIVATE *, int);
307 */
308 int
cl_omesg(SCR * sp,CL_PRIVATE * clp,int on)309 cl_omesg(SCR *sp, CL_PRIVATE *clp, int on)
310 {
311 struct stat sb;
312 char *tty;
313
314 /* Find the tty, get the current permissions. */
315 if ((tty = ttyname(STDERR_FILENO)) == NULL) {
316 if (sp != NULL)
317 msgq(sp, M_SYSERR, "stderr");
318 return (1);
319 }
320 if (stat(tty, &sb) < 0) {
321 if (sp != NULL)
322 msgq(sp, M_SYSERR, "%s", tty);
323 return (1);
324 }
325
326 /* Save the original status if it's unknown. */
327 if (clp->tgw == TGW_UNKNOWN)
328 clp->tgw = sb.st_mode & S_IWGRP ? TGW_SET : TGW_UNSET;
329
330 /* Toggle the permissions. */
331 if (on) {
332 if (chmod(tty, sb.st_mode | S_IWGRP) < 0) {
333 if (sp != NULL)
334 msgq(sp, M_SYSERR,
335 "046|messages not turned on: %s", tty);
336 return (1);
337 }
338 } else
339 if (chmod(tty, sb.st_mode & ~S_IWGRP) < 0) {
340 if (sp != NULL)
341 msgq(sp, M_SYSERR,
342 "045|messages not turned off: %s", tty);
343 return (1);
344 }
345 return (0);
346 }
347
348 /*
349 * cl_ssize --
350 * Return the terminal size.
351 *
352 * PUBLIC: int cl_ssize(SCR *, int, size_t *, size_t *, int *);
353 */
354 int
cl_ssize(SCR * sp,int sigwinch,size_t * rowp,size_t * colp,int * changedp)355 cl_ssize(SCR *sp, int sigwinch, size_t *rowp, size_t *colp, int *changedp)
356 {
357 struct winsize win;
358 size_t col, row;
359 int rval;
360 char *p;
361
362 /* Assume it's changed. */
363 if (changedp != NULL)
364 *changedp = 1;
365
366 /*
367 * !!!
368 * sp may be NULL.
369 *
370 * Get the screen rows and columns. If the values are wrong, it's
371 * not a big deal -- as soon as the user sets them explicitly the
372 * environment will be set and the screen package will use the new
373 * values.
374 *
375 * Try TIOCGWINSZ.
376 */
377 row = col = 0;
378 if (ioctl(STDERR_FILENO, TIOCGWINSZ, &win) != -1) {
379 row = win.ws_row;
380 col = win.ws_col;
381 }
382 /* If here because of suspend or a signal, only trust TIOCGWINSZ. */
383 if (sigwinch) {
384 /*
385 * Somebody didn't get TIOCGWINSZ right, or has suspend
386 * without window resizing support. The user just lost,
387 * but there's nothing we can do.
388 */
389 if (row == 0 || col == 0) {
390 if (changedp != NULL)
391 *changedp = 0;
392 return (0);
393 }
394
395 /*
396 * SunOS systems deliver SIGWINCH when windows are uncovered
397 * as well as when they change size. In addition, we call
398 * here when continuing after being suspended since the window
399 * may have changed size. Since we don't want to background
400 * all of the screens just because the window was uncovered,
401 * ignore the signal if there's no change.
402 */
403 if (sp != NULL &&
404 row == O_VAL(sp, O_LINES) && col == O_VAL(sp, O_COLUMNS)) {
405 if (changedp != NULL)
406 *changedp = 0;
407 return (0);
408 }
409
410 if (rowp != NULL)
411 *rowp = row;
412 if (colp != NULL)
413 *colp = col;
414 return (0);
415 }
416
417 /*
418 * !!!
419 * If TIOCGWINSZ failed, or had entries of 0, try termcap. This
420 * routine is called before any termcap or terminal information
421 * has been set up. If there's no TERM environmental variable set,
422 * let it go, at least ex can run.
423 */
424 if (row == 0 || col == 0) {
425 if ((p = getenv("TERM")) == NULL)
426 goto noterm;
427 if (row == 0)
428 if ((rval = tigetnum("lines")) < 0)
429 msgq(sp, M_SYSERR, "tigetnum: lines");
430 else
431 row = rval;
432 if (col == 0)
433 if ((rval = tigetnum("cols")) < 0)
434 msgq(sp, M_SYSERR, "tigetnum: cols");
435 else
436 col = rval;
437 }
438
439 /* If nothing else, well, it's probably a VT100. */
440 noterm: if (row == 0)
441 row = 24;
442 if (col == 0)
443 col = 80;
444
445 /*
446 * !!!
447 * POSIX 1003.2 requires the environment to override everything.
448 * Often, people can get nvi to stop messing up their screen by
449 * deleting the LINES and COLUMNS environment variables from their
450 * dot-files.
451 */
452 if ((p = getenv("LINES")) != NULL)
453 row = atoz_or(p, row);
454 if ((p = getenv("COLUMNS")) != NULL)
455 col = atoz_or(p, col);
456
457 if (rowp != NULL)
458 *rowp = row;
459 if (colp != NULL)
460 *colp = col;
461 return (0);
462 }
463
464 /*
465 * atoz_or --
466 * Parse non-zero positive decimal with a fallback.
467 */
468 static size_t
atoz_or(const char * s,size_t y)469 atoz_or(const char *s, size_t y)
470 {
471 char *ep;
472 long x = strtol(s, &ep, 10);
473
474 if (*ep == '\0' && (0 < x && x < INT_MAX))
475 return (size_t)x;
476 else
477 return y;
478 }
479
480 /*
481 * cl_putchar --
482 * Function version of putchar, for tputs.
483 *
484 * PUBLIC: int cl_putchar(int);
485 */
486 int
cl_putchar(int ch)487 cl_putchar(int ch)
488 {
489 return (putchar(ch));
490 }
491