contrib/nvi2/cl/cl_term.c

   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 #ifndef lint
  13 static const char sccsid[] = "$Id: cl_term.c,v 10.35 2015/04/08 02:12:11 zy Exp $";
  14 #endif /* not lint */
  15
  16 #include <sys/types.h>
  17 #include <sys/ioctl.h>
  18 #include <sys/queue.h>
  19 #include <sys/stat.h>
  20
  21 #include <bitstring.h>
  22 #include <errno.h>
  23 #include <limits.h>
  24 #include <signal.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #ifdef HAVE_TERM_H
  29 #include <term.h>
  30 #endif
  31 #include <termios.h>
  32 #include <unistd.h>
  33
  34 #include "../common/common.h"
  35 #include "cl.h"
  36
  37 static int cl_pfmap(SCR *, seq_t, CHAR_T *, size_t, CHAR_T *, size_t);
  38
  39 /*
  40  * XXX
  41  * THIS REQUIRES THAT ALL SCREENS SHARE A TERMINAL TYPE.
  42  */
  43 typedef struct _tklist {
  44         char    *ts;                    /* Key's termcap string. */
  45         char    *output;                /* Corresponding vi command. */
  46         char    *name;                  /* Name. */
  47         u_char   value;                 /* Special value (for lookup). */
  48 } TKLIST;
  49 static TKLIST const c_tklist[] = {      /* Command mappings. */
  50         {"kil1",        "O",    "insert line"},
  51         {"kdch1",       "x",    "delete character"},
  52         {"kcud1",       "j",    "cursor down"},
  53         {"kel",         "D",    "delete to eol"},
  54         {"kind",     "\004",    "scroll down"},                 /* ^D */
  55         {"kll",         "$",    "go to eol"},
  56         {"kend",        "$",    "go to eol"},
  57         {"khome",       "^",    "go to sol"},
  58         {"kich1",       "i",    "insert at cursor"},
  59         {"kdl1",       "dd",    "delete line"},
  60         {"kcub1",       "h",    "cursor left"},
  61         {"knp",      "\006",    "page down"},                   /* ^F */
  62         {"kpp",      "\002",    "page up"},                     /* ^B */
  63         {"kri",      "\025",    "scroll up"},                   /* ^U */
  64         {"ked",        "dG",    "delete to end of screen"},
  65         {"kcuf1",       "l",    "cursor right"},
  66         {"kcuu1",       "k",    "cursor up"},
  67         {NULL},
  68 };
  69 static TKLIST const m1_tklist[] = {     /* Input mappings (lookup). */
  70         {NULL},
  71 };
  72 static TKLIST const m2_tklist[] = {     /* Input mappings (set or delete). */
  73         {"kcud1",  "\033ja",    "cursor down"},                 /* ^[ja */
  74         {"kcub1",  "\033ha",    "cursor left"},                 /* ^[ha */
  75         {"kcuu1",  "\033ka",    "cursor up"},                   /* ^[ka */
  76         {"kcuf1",  "\033la",    "cursor right"},                /* ^[la */
  77         {NULL},
  78 };
  79
  80 /*
  81  * cl_term_init --
  82  *      Initialize the special keys defined by the termcap/terminfo entry.
  83  *
  84  * PUBLIC: int cl_term_init(SCR *);
  85  */
  86 int
  87 cl_term_init(SCR *sp)
  88 {
  89         KEYLIST *kp;
  90         SEQ *qp;
  91         TKLIST const *tkp;
  92         char *t;
  93         CHAR_T name[60];
  94         CHAR_T output[5];
  95         CHAR_T ts[20];
  96         CHAR_T *wp;
  97         size_t wlen;
  98
  99         /* Command mappings. */
 100         for (tkp = c_tklist; tkp->name != NULL; ++tkp) {
 101                 if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
 102                         continue;
 103                 CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
 104                 MEMCPY(name, wp, wlen);
 105                 CHAR2INT(sp, t, strlen(t), wp, wlen);
 106                 MEMCPY(ts, wp, wlen);
 107                 CHAR2INT(sp, tkp->output, strlen(tkp->output), wp, wlen);
 108                 MEMCPY(output, wp, wlen);
 109                 if (seq_set(sp, name, strlen(tkp->name), ts, strlen(t),
 110                     output, strlen(tkp->output), SEQ_COMMAND,
 111                     SEQ_NOOVERWRITE | SEQ_SCREEN))
 112                         return (1);
 113         }
 114
 115         /* Input mappings needing to be looked up. */
 116         for (tkp = m1_tklist; tkp->name != NULL; ++tkp) {
 117                 if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
 118                         continue;
 119                 for (kp = keylist;; ++kp)
 120                         if (kp->value == tkp->value)
 121                                 break;
 122                 if (kp == NULL)
 123                         continue;
 124                 CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
 125                 MEMCPY(name, wp, wlen);
 126                 CHAR2INT(sp, t, strlen(t), wp, wlen);
 127                 MEMCPY(ts, wp, wlen);
 128                 output[0] = (UCHAR_T)kp->ch;
 129                 if (seq_set(sp, name, strlen(tkp->name), ts, strlen(t),
 130                     output, 1, SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
 131                         return (1);
 132         }
 133
 134         /* Input mappings that are already set or are text deletions. */
 135         for (tkp = m2_tklist; tkp->name != NULL; ++tkp) {
 136                 if ((t = tigetstr(tkp->ts)) == NULL || t == (char *)-1)
 137                         continue;
 138                 /*
 139                  * !!!
 140                  * Some terminals' <cursor_left> keys send single <backspace>
 141                  * characters.  This is okay in command mapping, but not okay
 142                  * in input mapping.  That combination is the only one we'll
 143                  * ever see, hopefully, so kluge it here for now.
 144                  */
 145                 if (!strcmp(t, "\b"))
 146                         continue;
 147                 if (tkp->output == NULL) {
 148                         CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
 149                         MEMCPY(name, wp, wlen);
 150                         CHAR2INT(sp, t, strlen(t), wp, wlen);
 151                         MEMCPY(ts, wp, wlen);
 152                         if (seq_set(sp, name, strlen(tkp->name),
 153                             ts, strlen(t), NULL, 0,
 154                             SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
 155                                 return (1);
 156                 } else {
 157                         CHAR2INT(sp, tkp->name, strlen(tkp->name), wp, wlen);
 158                         MEMCPY(name, wp, wlen);
 159                         CHAR2INT(sp, t, strlen(t), wp, wlen);
 160                         MEMCPY(ts, wp, wlen);
 161                         CHAR2INT(sp, tkp->output, strlen(tkp->output), wp, wlen);
 162                         MEMCPY(output, wp, wlen);
 163                         if (seq_set(sp, name, strlen(tkp->name),
 164                             ts, strlen(t), output, strlen(tkp->output),
 165                             SEQ_INPUT, SEQ_NOOVERWRITE | SEQ_SCREEN))
 166                                 return (1);
 167                 }
 168         }
 169
 170         /*
 171          * Rework any function key mappings that were set before the
 172          * screen was initialized.
 173          */
 174         SLIST_FOREACH(qp, sp->gp->seqq, q)
 175                 if (F_ISSET(qp, SEQ_FUNCMAP))
 176                         (void)cl_pfmap(sp, qp->stype,
 177                             qp->input, qp->ilen, qp->output, qp->olen);
 178         return (0);
 179 }
 180
 181 /*
 182  * cl_term_end --
 183  *      End the special keys defined by the termcap/terminfo entry.
 184  *
 185  * PUBLIC: int cl_term_end(GS *);
 186  */
 187 int
 188 cl_term_end(GS *gp)
 189 {
 190         SEQ *qp, *nqp, *pre_qp = NULL;
 191
 192         /* Delete screen specific mappings. */
 193         SLIST_FOREACH_MUTABLE(qp, gp->seqq, q, nqp)
 194                 if (F_ISSET(qp, SEQ_SCREEN)) {
 195                         if (qp == SLIST_FIRST(gp->seqq))
 196                                 SLIST_REMOVE_HEAD(gp->seqq, q);
 197                         else
 198                                 SLIST_REMOVE_AFTER(pre_qp, q);
 199                         (void)seq_free(qp);
 200                 } else
 201                         pre_qp = qp;
 202         return (0);
 203 }
 204
 205 /*
 206  * cl_fmap --
 207  *      Map a function key.
 208  *
 209  * PUBLIC: int cl_fmap(SCR *, seq_t, CHAR_T *, size_t, CHAR_T *, size_t);
 210  */
 211 int
 212 cl_fmap(SCR *sp, seq_t stype, CHAR_T *from, size_t flen, CHAR_T *to, size_t tlen)
 213 {
 214         /* Ignore until the screen is running, do the real work then. */
 215         if (F_ISSET(sp, SC_VI) && !F_ISSET(sp, SC_SCR_VI))
 216                 return (0);
 217         if (F_ISSET(sp, SC_EX) && !F_ISSET(sp, SC_SCR_EX))
 218                 return (0);
 219
 220         return (cl_pfmap(sp, stype, from, flen, to, tlen));
 221 }
 222
 223 /*
 224  * cl_pfmap --
 225  *      Map a function key (private version).
 226  */
 227 static int
 228 cl_pfmap(SCR *sp, seq_t stype, CHAR_T *from, size_t flen, CHAR_T *to, size_t tlen)
 229 {
 230         size_t nlen;
 231         char *p;
 232         char name[64];
 233         CHAR_T keyname[64];
 234         CHAR_T ts[20];
 235         CHAR_T *wp;
 236         size_t wlen;
 237
 238         (void)snprintf(name, sizeof(name), "kf%d",
 239                         (int)STRTOL(from+1,NULL,10));
 240         if ((p = tigetstr(name)) == NULL ||
 241             p == (char *)-1 || strlen(p) == 0)
 242                 p = NULL;
 243         if (p == NULL) {
 244                 msgq_wstr(sp, M_ERR, from, "233|This terminal has no %s key");
 245                 return (1);
 246         }
 247
 248         nlen = SPRINTF(keyname,
 249             SIZE(keyname), L("function key %d"),
 250                         (int)STRTOL(from+1,NULL,10));
 251         CHAR2INT(sp, p, strlen(p), wp, wlen);
 252         MEMCPY(ts, wp, wlen);
 253         return (seq_set(sp, keyname, nlen,
 254             ts, strlen(p), to, tlen, stype, SEQ_NOOVERWRITE | SEQ_SCREEN));
 255 }
 256
 257 /*
 258  * cl_optchange --
 259  *      Curses screen specific "option changed" routine.
 260  *
 261  * PUBLIC: int cl_optchange(SCR *, int, char *, u_long *);
 262  */
 263 int
 264 cl_optchange(SCR *sp, int opt, char *str, u_long *valp)
 265 {
 266         CL_PRIVATE *clp;
 267
 268         clp = CLP(sp);
 269
 270         switch (opt) {
 271         case O_TERM:
 272                 F_CLR(sp, SC_SCR_EX | SC_SCR_VI);
 273                 /* FALLTHROUGH */
 274         case O_COLUMNS:
 275         case O_LINES:
 276                 /*
 277                  * Changing the terminal type requires that we reinitialize
 278                  * curses, while resizing does not.
 279                  */
 280                 F_SET(sp->gp, G_SRESTART);
 281                 break;
 282         case O_MESG:
 283                 (void)cl_omesg(sp, clp, *valp);
 284                 break;
 285         case O_WINDOWNAME:
 286                 if (*valp) {
 287                         F_SET(clp, CL_RENAME_OK);
 288
 289                         /*
 290                          * If the screen is live, i.e. we're not reading the
 291                          * .exrc file, update the window.
 292                          */
 293                         if (sp->frp != NULL && sp->frp->name != NULL)
 294                                 (void)cl_rename(sp, sp->frp->name, 1);
 295                 } else {
 296                         F_CLR(clp, CL_RENAME_OK);
 297
 298                         (void)cl_rename(sp, NULL, 0);
 299                 }
 300                 break;
 301         }
 302         return (0);
 303 }
 304
 305 /*
 306  * cl_omesg --
 307  *      Turn the tty write permission on or off.
 308  *
 309  * PUBLIC: int cl_omesg(SCR *, CL_PRIVATE *, int);
 310  */
 311 int
 312 cl_omesg(SCR *sp, CL_PRIVATE *clp, int on)
 313 {
 314         struct stat sb;
 315         char *tty;
 316
 317         /* Find the tty, get the current permissions. */
 318         if ((tty = ttyname(STDERR_FILENO)) == NULL) {
 319                 if (sp != NULL)
 320                         msgq(sp, M_SYSERR, "stderr");
 321                 return (1);
 322         }
 323         if (stat(tty, &sb) < 0) {
 324                 if (sp != NULL)
 325                         msgq(sp, M_SYSERR, "%s", tty);
 326                 return (1);
 327         }
 328
 329         /* Save the original status if it's unknown. */
 330         if (clp->tgw == TGW_UNKNOWN)
 331                 clp->tgw = sb.st_mode & S_IWGRP ? TGW_SET : TGW_UNSET;
 332
 333         /* Toggle the permissions. */
 334         if (on) {
 335                 if (chmod(tty, sb.st_mode | S_IWGRP) < 0) {
 336                         if (sp != NULL)
 337                                 msgq(sp, M_SYSERR,
 338                                     "046|messages not turned on: %s", tty);
 339                         return (1);
 340                 }
 341         } else
 342                 if (chmod(tty, sb.st_mode & ~S_IWGRP) < 0) {
 343                         if (sp != NULL)
 344                                 msgq(sp, M_SYSERR,
 345                                     "045|messages not turned off: %s", tty);
 346                         return (1);
 347                 }
 348         return (0);
 349 }
 350
 351 /*
 352  * cl_ssize --
 353  *      Return the terminal size.
 354  *
 355  * PUBLIC: int cl_ssize(SCR *, int, size_t *, size_t *, int *);
 356  */
 357 int
 358 cl_ssize(SCR *sp, int sigwinch, size_t *rowp, size_t *colp, int *changedp)
 359 {
 360         struct winsize win;
 361         size_t col, row;
 362         int rval;
 363         char *p;
 364
 365         /* Assume it's changed. */
 366         if (changedp != NULL)
 367                 *changedp = 1;
 368
 369         /*
 370          * !!!
 371          * sp may be NULL.
 372          *
 373          * Get the screen rows and columns.  If the values are wrong, it's
 374          * not a big deal -- as soon as the user sets them explicitly the
 375          * environment will be set and the screen package will use the new
 376          * values.
 377          *
 378          * Try TIOCGWINSZ.
 379          */
 380         row = col = 0;
 381         if (ioctl(STDERR_FILENO, TIOCGWINSZ, &win) != -1) {
 382                 row = win.ws_row;
 383                 col = win.ws_col;
 384         }
 385         /* If here because of suspend or a signal, only trust TIOCGWINSZ. */
 386         if (sigwinch) {
 387                 /*
 388                  * Somebody didn't get TIOCGWINSZ right, or has suspend
 389                  * without window resizing support.  The user just lost,
 390                  * but there's nothing we can do.
 391                  */
 392                 if (row == 0 || col == 0) {
 393                         if (changedp != NULL)
 394                                 *changedp = 0;
 395                         return (0);
 396                 }
 397
 398                 /*
 399                  * SunOS systems deliver SIGWINCH when windows are uncovered
 400                  * as well as when they change size.  In addition, we call
 401                  * here when continuing after being suspended since the window
 402                  * may have changed size.  Since we don't want to background
 403                  * all of the screens just because the window was uncovered,
 404                  * ignore the signal if there's no change.
 405                  */
 406                 if (sp != NULL &&
 407                     row == O_VAL(sp, O_LINES) && col == O_VAL(sp, O_COLUMNS)) {
 408                         if (changedp != NULL)
 409                                 *changedp = 0;
 410                         return (0);
 411                 }
 412
 413                 if (rowp != NULL)
 414                         *rowp = row;
 415                 if (colp != NULL)
 416                         *colp = col;
 417                 return (0);
 418         }
 419
 420         /*
 421          * !!!
 422          * If TIOCGWINSZ failed, or had entries of 0, try termcap.  This
 423          * routine is called before any termcap or terminal information
 424          * has been set up.  If there's no TERM environmental variable set,
 425          * let it go, at least ex can run.
 426          */
 427         if (row == 0 || col == 0) {
 428                 if ((p = getenv("TERM")) == NULL)
 429                         goto noterm;
 430                 if (row == 0)
 431                         if ((rval = tigetnum("lines")) < 0)
 432                                 msgq(sp, M_SYSERR, "tigetnum: lines");
 433                         else
 434                                 row = rval;
 435                 if (col == 0)
 436                         if ((rval = tigetnum("cols")) < 0)
 437                                 msgq(sp, M_SYSERR, "tigetnum: cols");
 438                         else
 439                                 col = rval;
 440         }
 441
 442         /* If nothing else, well, it's probably a VT100. */
 443 noterm: if (row == 0)
 444                 row = 24;
 445         if (col == 0)
 446                 col = 80;
 447
 448         /*
 449          * !!!
 450          * POSIX 1003.2 requires the environment to override everything.
 451          * Often, people can get nvi to stop messing up their screen by
 452          * deleting the LINES and COLUMNS environment variables from their
 453          * dot-files.
 454          */
 455         if ((p = getenv("LINES")) != NULL)
 456                 row = strtol(p, NULL, 10);
 457         if ((p = getenv("COLUMNS")) != NULL)
 458                 col = strtol(p, NULL, 10);
 459
 460         if (rowp != NULL)
 461                 *rowp = row;
 462         if (colp != NULL)
 463                 *colp = col;
 464         return (0);
 465 }
 466
 467 /*
 468  * cl_putchar --
 469  *      Function version of putchar, for tputs.
 470  *
 471  * PUBLIC: int cl_putchar(int);
 472  */
 473 int
 474 cl_putchar(int ch)
 475 {
 476         return (putchar(ch));
 477 }