1 /****************************************************************************
2 * Copyright (c) 1998,1999,2000 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 1.60 2000/09/02 18:13:12 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);
103 int LINES = 0, COLS = 0, TABSIZE = 0;
106 _nc_get_screensize(int *linep, int *colp)
107 /* Obtain lines/columns values from the environment and/or terminfo entry */
109 /* figure out the size of the screen */
110 T(("screen size: terminfo lines = %d columns = %d", lines, columns));
113 *linep = (int) lines;
114 *colp = (int) columns;
115 } else { /* usually want to query LINES and COLUMNS from environment */
120 /* first, look for environment variables */
121 if ((value = _nc_getenv_num("LINES")) > 0) {
124 if ((value = _nc_getenv_num("COLUMNS")) > 0) {
127 T(("screen size: environment LINES = %d COLUMNS = %d", *linep, *colp));
130 if (*linep <= 0 || *colp <= 0) {
132 _scrsize(screendata);
133 *colp = screendata[0];
134 *linep = screendata[1];
135 T(("EMX screen size: environment LINES = %d COLUMNS = %d",
140 /* if that didn't work, maybe we can try asking the OS */
141 if (*linep <= 0 || *colp <= 0) {
142 if (isatty(cur_term->Filedes)) {
147 if (ioctl(cur_term->Filedes, IOCTL_WINSIZE, &size) < 0
154 * Solaris lets users override either dimension with an
155 * environment variable.
158 *linep = WINSIZE_ROWS(size);
160 *colp = WINSIZE_COLS(size);
165 #endif /* HAVE_SIZECHANGE */
167 /* if we can't get dynamic info about the size, use static */
168 if (*linep <= 0 || *colp <= 0)
169 if (lines > 0 && columns > 0) {
170 *linep = (int) lines;
171 *colp = (int) columns;
174 /* the ultimate fallback, assume fixed 24x80 size */
175 if (*linep <= 0 || *colp <= 0) {
181 * Put the derived values back in the screen-size caps, so
182 * tigetnum() and tgetnum() will do the right thing.
184 lines = (short) (*linep);
185 columns = (short) (*colp);
188 T(("screen size is %dx%d", *linep, *colp));
190 if (VALID_NUMERIC(init_tabs))
191 TABSIZE = (int) init_tabs;
194 T(("TABSIZE = %d", TABSIZE));
200 _nc_update_screensize(void)
202 int my_lines, my_cols;
204 _nc_get_screensize(&my_lines, &my_cols);
205 if (SP != 0 && SP->_resize != 0)
206 SP->_resize(my_lines, my_cols);
210 /****************************************************************************
214 ****************************************************************************/
216 #define ret_error(code, fmt, arg) if (errret) {\
220 fprintf(stderr, fmt, arg);\
224 #define ret_error0(code, msg) if (errret) {\
228 fprintf(stderr, msg);\
234 grab_entry(const char *const tn, TERMTYPE * const tp)
235 /* return 1 if entry found, 0 if not found, -1 if database not accessible */
237 char filename[PATH_MAX];
241 * $TERM shouldn't contain pathname delimiters.
246 if ((status = _nc_read_entry(tn, filename, tp)) != 1) {
250 * Try falling back on the termcap file.
251 * Note: allowing this call links the entire terminfo/termcap
252 * compiler into the startup code. It's preferable to build a
253 * real terminfo database and use that.
255 status = _nc_read_termcap_entry(tn, tp);
256 #endif /* PURE_TERMINFO */
261 * If we have an entry, force all of the cancelled strings to null
262 * pointers so we don't have to test them in the rest of the library.
263 * (The terminfo compiler bypasses this logic, since it must know if
264 * a string is cancelled, for merging entries).
268 for_each_boolean(n, tp)
269 if (!VALID_BOOLEAN(tp->Booleans[n]))
270 tp->Booleans[n] = FALSE;
271 for_each_string(n, tp)
272 if (tp->Strings[n] == CANCELLED_STRING)
273 tp->Strings[n] = ABSENT_STRING;
279 char ttytype[NAMESIZE] = "";
282 * setupterm(termname, Filedes, errret)
284 * Find and read the appropriate object file for the terminal
285 * Make cur_term point to the structure.
290 setupterm(NCURSES_CONST char *tname, int Filedes, int *errret)
292 struct term *term_ptr;
295 T((T_CALLED("setupterm(%s,%d,%p)"), _nc_visbuf(tname), Filedes, errret));
298 tname = getenv("TERM");
299 if (tname == 0 || *tname == '\0') {
300 ret_error0(-1, "TERM environment variable not set.\n");
303 if (strlen(tname) > MAX_NAME_SIZE) {
304 ret_error(-1, "TERM environment must be <= %d characters.\n",
308 T(("your terminal name is %s", tname));
310 term_ptr = typeCalloc(TERMINAL, 1);
313 ret_error0(-1, "Not enough memory to create terminal structure.\n");
316 status = grab_entry(tname, &term_ptr->type);
321 /* try fallback list if entry on disk */
323 const TERMTYPE *fallback = _nc_fallback(tname);
326 term_ptr->type = *fallback;
332 ret_error0(-1, "terminals database is inaccessible\n");
333 } else if (status == 0) {
334 ret_error(0, "'%s': unknown terminal type.\n", tname);
338 * Improve on SVr4 curses. If an application mixes curses and termcap
339 * calls, it may call both initscr and tgetent. This is not really a
340 * good thing to do, but can happen if someone tries using ncurses with
341 * the readline library. The problem we are fixing is that when
342 * tgetent calls setupterm, the resulting Ottyb struct in cur_term is
343 * zeroed. A subsequent call to endwin uses the zeroed terminal
344 * settings rather than the ones saved in initscr. So we check if
345 * cur_term appears to contain terminal settings for the same output
346 * file as our current call - and copy those terminal settings. (SVr4
347 * curses does not do this, however applications that are working
348 * around the problem will still work properly with this feature).
351 if (cur_term->Filedes == Filedes)
352 term_ptr->Ottyb = cur_term->Ottyb;
355 set_curterm(term_ptr);
357 if (command_character && getenv("CC"))
360 strncpy(ttytype, cur_term->type.term_names, NAMESIZE - 1);
361 ttytype[NAMESIZE - 1] = '\0';
364 * Allow output redirection. This is what SVr3 does.
365 * If stdout is directed to a file, screen updates go
368 if (Filedes == STDOUT_FILENO && !isatty(Filedes))
369 Filedes = STDERR_FILENO;
370 cur_term->Filedes = Filedes;
372 _nc_get_screensize(&LINES, &COLS);
377 T((T_CREATE("screen %s %dx%d"), tname, LINES, COLS));
380 ret_error(0, "'%s': I need something more specific.\n", tname);
383 ret_error(1, "'%s': I can't handle hardcopy terminals.\n", tname);
391 ** Take the real command character out of the CC environment variable
392 ** and substitute it in for the prototype given in 'command_character'.
406 proto = *command_character;
408 for_each_string(i, &(cur_term->type)) {
409 for (tmp = cur_term->type.Strings[i]; *tmp; tmp++) {