1 /****************************************************************************
2 * Copyright (c) 1998-2001,2002 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 ****************************************************************************/
35 * Terminal setup routines common to termcap and terminfo:
38 * setupterm(char *, int, int *)
41 #include <curses.priv.h>
42 #include <tic.h> /* for MAX_NAME_SIZE */
43 #include <term_entry.h>
45 #if SVR4_TERMIO && !defined(_POSIX_SOURCE)
49 #include <term.h> /* lines, columns, cur_term */
51 MODULE_ID("$Id: lib_setup.c,v 1.70 2002/10/12 21:50:18 tom Exp $")
53 /****************************************************************************
55 * Terminal size computation
57 ****************************************************************************/
60 # if !defined(sun) || !TERMIOS
62 # include <sys/ioctl.h>
68 /* On SCO, they neglected to define struct winsize in termios.h -- it's only
69 * in termio.h and ptem.h (the former conflicts with other definitions).
71 # include <sys/stream.h>
72 # include <sys/ptem.h>
76 * SCO defines TIOCGSIZE and the corresponding struct. Other systems (SunOS,
77 * Solaris, IRIX) define TIOCGWINSZ and struct winsize.
80 # define IOCTL_WINSIZE TIOCGSIZE
81 # define STRUCT_WINSIZE struct ttysize
82 # define WINSIZE_ROWS(n) (int)n.ts_lines
83 # define WINSIZE_COLS(n) (int)n.ts_cols
86 # define IOCTL_WINSIZE TIOCGWINSZ
87 # define STRUCT_WINSIZE struct winsize
88 # define WINSIZE_ROWS(n) (int)n.ws_row
89 # define WINSIZE_COLS(n) (int)n.ws_col
93 static int _use_env = TRUE;
95 static void do_prototype(void);
100 T((T_CALLED("use_env()")));
105 NCURSES_EXPORT_VAR(int) LINES = 0;
106 NCURSES_EXPORT_VAR(int) COLS = 0;
107 NCURSES_EXPORT_VAR(int) TABSIZE = 0;
110 _nc_get_screensize(int *linep, int *colp)
111 /* Obtain lines/columns values from the environment and/or terminfo entry */
113 /* figure out the size of the screen */
114 T(("screen size: terminfo lines = %d columns = %d", lines, columns));
117 *linep = (int) lines;
118 *colp = (int) columns;
119 } else { /* usually want to query LINES and COLUMNS from environment */
124 /* first, look for environment variables */
125 if ((value = _nc_getenv_num("LINES")) > 0) {
128 if ((value = _nc_getenv_num("COLUMNS")) > 0) {
131 T(("screen size: environment LINES = %d COLUMNS = %d", *linep, *colp));
134 if (*linep <= 0 || *colp <= 0) {
136 _scrsize(screendata);
137 *colp = screendata[0];
138 *linep = screendata[1];
139 T(("EMX screen size: environment LINES = %d COLUMNS = %d",
144 /* if that didn't work, maybe we can try asking the OS */
145 if (*linep <= 0 || *colp <= 0) {
146 if (isatty(cur_term->Filedes)) {
151 if (ioctl(cur_term->Filedes, IOCTL_WINSIZE, &size) < 0
158 * Solaris lets users override either dimension with an
159 * environment variable.
162 *linep = WINSIZE_ROWS(size);
164 *colp = WINSIZE_COLS(size);
169 #endif /* HAVE_SIZECHANGE */
171 /* if we can't get dynamic info about the size, use static */
173 *linep = (int) lines;
176 *colp = (int) columns;
179 /* the ultimate fallback, assume fixed 24x80 size */
188 * Put the derived values back in the screen-size caps, so
189 * tigetnum() and tgetnum() will do the right thing.
191 lines = (short) (*linep);
192 columns = (short) (*colp);
195 T(("screen size is %dx%d", *linep, *colp));
197 if (VALID_NUMERIC(init_tabs))
198 TABSIZE = (int) init_tabs;
201 T(("TABSIZE = %d", TABSIZE));
207 _nc_update_screensize(void)
209 int my_lines, my_cols;
211 _nc_get_screensize(&my_lines, &my_cols);
212 if (SP != 0 && SP->_resize != 0)
213 SP->_resize(my_lines, my_cols);
217 /****************************************************************************
221 ****************************************************************************/
223 #define ret_error(code, fmt, arg) if (errret) {\
227 fprintf(stderr, fmt, arg);\
231 #define ret_error0(code, msg) if (errret) {\
235 fprintf(stderr, msg);\
239 #if USE_DATABASE || USE_TERMCAP
241 grab_entry(const char *const tn, TERMTYPE * const tp)
242 /* return 1 if entry found, 0 if not found, -1 if database not accessible */
244 char filename[PATH_MAX];
248 * $TERM shouldn't contain pathname delimiters.
254 if ((status = _nc_read_entry(tn, filename, tp)) != 1) {
258 * Try falling back on the termcap file.
259 * Note: allowing this call links the entire terminfo/termcap
260 * compiler into the startup code. It's preferable to build a
261 * real terminfo database and use that.
263 status = _nc_read_termcap_entry(tn, tp);
264 #endif /* PURE_TERMINFO */
268 status = _nc_read_termcap_entry(tn, tp);
272 * If we have an entry, force all of the cancelled strings to null
273 * pointers so we don't have to test them in the rest of the library.
274 * (The terminfo compiler bypasses this logic, since it must know if
275 * a string is cancelled, for merging entries).
279 for_each_boolean(n, tp) {
280 if (!VALID_BOOLEAN(tp->Booleans[n]))
281 tp->Booleans[n] = FALSE;
283 for_each_string(n, tp) {
284 if (tp->Strings[n] == CANCELLED_STRING)
285 tp->Strings[n] = ABSENT_STRING;
292 NCURSES_EXPORT_VAR(char) ttytype[NAMESIZE] = "";
295 * setupterm(termname, Filedes, errret)
297 * Find and read the appropriate object file for the terminal
298 * Make cur_term point to the structure.
303 setupterm(NCURSES_CONST char *tname, int Filedes, int *errret)
305 struct term *term_ptr;
309 T((T_CALLED("setupterm(%s,%d,%p)"), _nc_visbuf(tname), Filedes, errret));
312 tname = getenv("TERM");
313 if (tname == 0 || *tname == '\0') {
314 ret_error0(-1, "TERM environment variable not set.\n");
317 if (strlen(tname) > MAX_NAME_SIZE) {
318 ret_error(-1, "TERM environment must be <= %d characters.\n",
322 T(("your terminal name is %s", tname));
324 term_ptr = typeCalloc(TERMINAL, 1);
327 ret_error0(-1, "Not enough memory to create terminal structure.\n");
329 #if USE_DATABASE || USE_TERMCAP
330 status = grab_entry(tname, &term_ptr->type);
335 /* try fallback list if entry on disk */
337 const TERMTYPE *fallback = _nc_fallback(tname);
340 term_ptr->type = *fallback;
346 ret_error0(-1, "terminals database is inaccessible\n");
347 } else if (status == 0) {
348 ret_error(0, "'%s': unknown terminal type.\n", tname);
352 * Improve on SVr4 curses. If an application mixes curses and termcap
353 * calls, it may call both initscr and tgetent. This is not really a
354 * good thing to do, but can happen if someone tries using ncurses with
355 * the readline library. The problem we are fixing is that when
356 * tgetent calls setupterm, the resulting Ottyb struct in cur_term is
357 * zeroed. A subsequent call to endwin uses the zeroed terminal
358 * settings rather than the ones saved in initscr. So we check if
359 * cur_term appears to contain terminal settings for the same output
360 * file as our current call - and copy those terminal settings. (SVr4
361 * curses does not do this, however applications that are working
362 * around the problem will still work properly with this feature).
365 if (cur_term->Filedes == Filedes)
366 term_ptr->Ottyb = cur_term->Ottyb;
369 set_curterm(term_ptr);
371 if (command_character && getenv("CC"))
374 strncpy(ttytype, cur_term->type.term_names, NAMESIZE - 1);
375 ttytype[NAMESIZE - 1] = '\0';
378 * Allow output redirection. This is what SVr3 does. If stdout is
379 * directed to a file, screen updates go to standard error.
381 if (Filedes == STDOUT_FILENO && !isatty(Filedes))
382 Filedes = STDERR_FILENO;
383 cur_term->Filedes = Filedes;
386 * If an application calls setupterm() rather than initscr() or newterm(),
387 * we will not have the def_prog_mode() call in _nc_setupscreen(). Do it
388 * now anyway, so we can initialize the baudrate.
390 if (isatty(Filedes)) {
395 _nc_get_screensize(&LINES, &COLS);
400 T((T_CREATE("screen %s %dx%d"), tname, LINES, COLS));
403 ret_error(0, "'%s': I need something more specific.\n", tname);
406 ret_error(1, "'%s': I can't handle hardcopy terminals.\n", tname);
414 ** Take the real command character out of the CC environment variable
415 ** and substitute it in for the prototype given in 'command_character'.
429 proto = *command_character;
431 for_each_string(i, &(cur_term->type)) {
432 for (tmp = cur_term->type.Strings[i]; *tmp; tmp++) {