1 /****************************************************************************
2 * Copyright (c) 1998 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 ****************************************************************************/
36 * Terminal setup routines common to termcap and terminfo:
39 * setupterm(char *, int, int *)
42 #include <curses.priv.h>
43 #include <tic.h> /* for MAX_NAME_SIZE */
44 #include <term_entry.h>
46 #if defined(SVR4_TERMIO) && !defined(_POSIX_SOURCE)
50 #include <term.h> /* lines, columns, cur_term */
52 MODULE_ID("$Id: lib_setup.c,v 1.55 1999/08/21 23:06:08 tom Exp $")
54 /****************************************************************************
56 * Terminal size computation
58 ****************************************************************************/
61 # if !defined(sun) || !TERMIOS
63 # include <sys/ioctl.h>
69 /* On SCO, they neglected to define struct winsize in termios.h -- it's only
70 * in termio.h and ptem.h (the former conflicts with other definitions).
72 # include <sys/stream.h>
73 # include <sys/ptem.h>
77 * SCO defines TIOCGSIZE and the corresponding struct. Other systems (SunOS,
78 * Solaris, IRIX) define TIOCGWINSZ and struct winsize.
81 # define IOCTL_WINSIZE TIOCGSIZE
82 # define STRUCT_WINSIZE struct ttysize
83 # define WINSIZE_ROWS(n) (int)n.ts_lines
84 # define WINSIZE_COLS(n) (int)n.ts_cols
87 # define IOCTL_WINSIZE TIOCGWINSZ
88 # define STRUCT_WINSIZE struct winsize
89 # define WINSIZE_ROWS(n) (int)n.ws_row
90 # define WINSIZE_COLS(n) (int)n.ws_col
94 static int _use_env = TRUE;
96 static void do_prototype(void);
103 int LINES, COLS, TABSIZE;
105 static void _nc_get_screensize(int *linep, int *colp)
106 /* Obtain lines/columns values from the environment and/or terminfo entry */
108 /* figure out the size of the screen */
109 T(("screen size: terminfo lines = %d columns = %d", lines, columns));
114 *colp = (int)columns;
116 else /* usually want to query LINES and COLUMNS from environment */
122 /* first, look for environment variables */
123 if ((value = _nc_getenv_num("LINES")) > 0) {
126 if ((value = _nc_getenv_num("COLUMNS")) > 0) {
129 T(("screen size: environment LINES = %d COLUMNS = %d",*linep,*colp));
132 if (*linep <= 0 || *colp <= 0)
135 _scrsize(screendata);
136 *colp = screendata[0];
137 *linep = screendata[1];
138 T(("EMX screen size: environment LINES = %d COLUMNS = %d",*linep,*colp));
142 /* if that didn't work, maybe we can try asking the OS */
143 if (*linep <= 0 || *colp <= 0)
145 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 */
172 if (*linep <= 0 || *colp <= 0)
173 if (lines > 0 && columns > 0)
176 *colp = (int)columns;
179 /* the ultimate fallback, assume fixed 24x80 size */
180 if (*linep <= 0 || *colp <= 0)
187 * Put the derived values back in the screen-size caps, so
188 * tigetnum() and tgetnum() will do the right thing.
190 lines = (short)(*linep);
191 columns = (short)(*colp);
194 T(("screen size is %dx%d", *linep, *colp));
197 TABSIZE = (int)init_tabs;
200 T(("TABSIZE = %d", TABSIZE));
205 void _nc_update_screensize(void)
207 int my_lines, my_cols;
209 _nc_get_screensize(&my_lines, &my_cols);
210 if (SP != 0 && SP->_resize != 0)
211 SP->_resize(my_lines, my_cols);
215 /****************************************************************************
219 ****************************************************************************/
221 #define ret_error(code, fmt, arg) if (errret) {\
225 fprintf(stderr, fmt, arg);\
229 #define ret_error0(code, msg) if (errret) {\
233 fprintf(stderr, msg);\
238 static int grab_entry(const char *const tn, TERMTYPE *const tp)
239 /* return 1 if entry found, 0 if not found, -1 if database not accessible */
241 char filename[PATH_MAX];
245 * $TERM shouldn't contain pathname delimiters.
250 if ((status = _nc_read_entry(tn, filename, tp)) != 1) {
252 #ifndef PURE_TERMINFO
254 * Try falling back on the termcap file.
255 * Note: allowing this call links the entire terminfo/termcap
256 * compiler into the startup code. It's preferable to build a
257 * real terminfo database and use that.
259 status = _nc_read_termcap_entry(tn, tp);
260 #endif /* PURE_TERMINFO */
265 * If we have an entry, force all of the cancelled strings to null
266 * pointers so we don't have to test them in the rest of the library.
267 * (The terminfo compiler bypasses this logic, since it must know if
268 * a string is cancelled, for merging entries).
272 for_each_boolean(n,tp)
273 if (!VALID_BOOLEAN(tp->Booleans[n]))
274 tp->Booleans[n] = FALSE;
275 for_each_string(n,tp)
276 if (tp->Strings[n] == CANCELLED_STRING)
277 tp->Strings[n] = ABSENT_STRING;
283 char ttytype[NAMESIZE];
286 * setupterm(termname, Filedes, errret)
288 * Find and read the appropriate object file for the terminal
289 * Make cur_term point to the structure.
293 int setupterm(NCURSES_CONST char *tname, int Filedes, int *errret)
295 struct term *term_ptr;
298 T((T_CALLED("setupterm(%s,%d,%p)"), _nc_visbuf(tname), Filedes, errret));
301 tname = getenv("TERM");
302 if (tname == 0 || *tname == '\0') {
303 ret_error0(-1, "TERM environment variable not set.\n");
306 if (strlen(tname) > MAX_NAME_SIZE) {
307 ret_error(-1, "TERM environment must be <= %d characters.\n",
311 T(("your terminal name is %s", tname));
313 term_ptr = typeCalloc(TERMINAL, 1);
316 ret_error0(-1, "Not enough memory to create terminal structure.\n") ;
319 status = grab_entry(tname, &term_ptr->type);
324 /* try fallback list if entry on disk */
327 const TERMTYPE *fallback = _nc_fallback(tname);
331 term_ptr->type = *fallback;
338 ret_error0(-1, "terminals database is inaccessible\n");
340 else if (status == 0)
342 ret_error(0, "'%s': unknown terminal type.\n", tname);
346 * Improve on SVr4 curses. If an application mixes curses and termcap
347 * calls, it may call both initscr and tgetent. This is not really a
348 * good thing to do, but can happen if someone tries using ncurses with
349 * the readline library. The problem we are fixing is that when
350 * tgetent calls setupterm, the resulting Ottyb struct in cur_term is
351 * zeroed. A subsequent call to endwin uses the zeroed terminal
352 * settings rather than the ones saved in initscr. So we check if
353 * cur_term appears to contain terminal settings for the same output
354 * file as our current call - and copy those terminal settings. (SVr4
355 * curses does not do this, however applications that are working
356 * around the problem will still work properly with this feature).
359 if (cur_term->Filedes == Filedes)
360 term_ptr->Ottyb = cur_term->Ottyb;
363 set_curterm(term_ptr);
365 if (command_character && getenv("CC"))
368 strncpy(ttytype, cur_term->type.term_names, NAMESIZE - 1);
369 ttytype[NAMESIZE - 1] = '\0';
372 * Allow output redirection. This is what SVr3 does.
373 * If stdout is directed to a file, screen updates go
376 if (Filedes == STDOUT_FILENO && !isatty(Filedes))
377 Filedes = STDERR_FILENO;
378 cur_term->Filedes = Filedes;
380 _nc_get_screensize(&LINES, &COLS);
385 T((T_CREATE("screen %s %dx%d"), tname, LINES, COLS));
388 ret_error(0, "'%s': I need something more specific.\n", tname);
391 ret_error(1, "'%s': I can't handle hardcopy terminals.\n", tname);
399 ** Take the real command character out of the CC environment variable
400 ** and substitute it in for the prototype given in 'command_character'.
414 proto = *command_character;
416 for_each_string(i, &(cur_term->type)) {
417 for (tmp = cur_term->type.Strings[i]; *tmp; tmp++) {