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| Current File : //usr/src/contrib/ncurses/ncurses/tinfo/lib_setup.c |
/****************************************************************************
* Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
* and: Thomas E. Dickey 1996-on *
****************************************************************************/
/*
* Terminal setup routines common to termcap and terminfo:
*
* use_env(bool)
* setupterm(char *, int, int *)
*/
#include <curses.priv.h>
#include <tic.h> /* for MAX_NAME_SIZE */
#include <term_entry.h>
#if SVR4_TERMIO && !defined(_POSIX_SOURCE)
#define _POSIX_SOURCE
#endif
#if HAVE_LOCALE_H
#include <locale.h>
#endif
#include <term.h> /* lines, columns, cur_term */
MODULE_ID("$Id: lib_setup.c,v 1.111 2008/08/03 22:42:33 tom Exp $")
/****************************************************************************
*
* Terminal size computation
*
****************************************************************************/
#if HAVE_SIZECHANGE
# if !defined(sun) || !TERMIOS
# if HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
# endif
# endif
#endif
#if NEED_PTEM_H
/* On SCO, they neglected to define struct winsize in termios.h -- it's only
* in termio.h and ptem.h (the former conflicts with other definitions).
*/
# include <sys/stream.h>
# include <sys/ptem.h>
#endif
#if HAVE_LANGINFO_CODESET
#include <langinfo.h>
#endif
/*
* SCO defines TIOCGSIZE and the corresponding struct. Other systems (SunOS,
* Solaris, IRIX) define TIOCGWINSZ and struct winsize.
*/
#ifdef TIOCGSIZE
# define IOCTL_WINSIZE TIOCGSIZE
# define STRUCT_WINSIZE struct ttysize
# define WINSIZE_ROWS(n) (int)n.ts_lines
# define WINSIZE_COLS(n) (int)n.ts_cols
#else
# ifdef TIOCGWINSZ
# define IOCTL_WINSIZE TIOCGWINSZ
# define STRUCT_WINSIZE struct winsize
# define WINSIZE_ROWS(n) (int)n.ws_row
# define WINSIZE_COLS(n) (int)n.ws_col
# endif
#endif
/*
* Reduce explicit use of "cur_term" global variable.
*/
#undef CUR
#define CUR termp->type.
/*
* Wrap global variables in this module.
*/
#if USE_REENTRANT
NCURSES_EXPORT(char *)
NCURSES_PUBLIC_VAR(ttytype) (void)
{
static char empty[] = "";
return cur_term ? cur_term->type.term_names : empty;
}
NCURSES_EXPORT(int *)
_nc_ptr_Lines(void)
{
return ptrLines();
}
NCURSES_EXPORT(int)
NCURSES_PUBLIC_VAR(LINES) (void)
{
return *_nc_ptr_Lines();
}
NCURSES_EXPORT(int *)
_nc_ptr_Cols(void)
{
return ptrCols();
}
NCURSES_EXPORT(int)
NCURSES_PUBLIC_VAR(COLS) (void)
{
return *_nc_ptr_Cols();
}
NCURSES_EXPORT(int)
NCURSES_PUBLIC_VAR(TABSIZE) (void)
{
return SP ? SP->_TABSIZE : 8;
}
#else
NCURSES_EXPORT_VAR(char) ttytype[NAMESIZE] = "";
NCURSES_EXPORT_VAR(int) LINES = 0;
NCURSES_EXPORT_VAR(int) COLS = 0;
NCURSES_EXPORT_VAR(int) TABSIZE = 0;
#endif
#if NCURSES_EXT_FUNCS
NCURSES_EXPORT(int)
set_tabsize(int value)
{
int code = OK;
#if USE_REENTRANT
if (SP) {
SP->_TABSIZE = value;
} else {
code = ERR;
}
#else
TABSIZE = value;
#endif
return code;
}
#endif
#if USE_SIGWINCH
/*
* If we have a pending SIGWINCH, set the flag in each screen.
*/
NCURSES_EXPORT(int)
_nc_handle_sigwinch(SCREEN *sp)
{
SCREEN *scan;
if (_nc_globals.have_sigwinch) {
_nc_globals.have_sigwinch = 0;
for (each_screen(scan)) {
scan->_sig_winch = TRUE;
}
}
return (sp ? sp->_sig_winch : 0);
}
#endif
NCURSES_EXPORT(void)
use_env(bool f)
{
T((T_CALLED("use_env()")));
_nc_prescreen.use_env = f;
returnVoid;
}
NCURSES_EXPORT(void)
_nc_get_screensize(SCREEN *sp, int *linep, int *colp)
/* Obtain lines/columns values from the environment and/or terminfo entry */
{
TERMINAL *termp = cur_term;
int my_tabsize;
/* figure out the size of the screen */
T(("screen size: terminfo lines = %d columns = %d", lines, columns));
if (!_nc_prescreen.use_env) {
*linep = (int) lines;
*colp = (int) columns;
} else { /* usually want to query LINES and COLUMNS from environment */
int value;
*linep = *colp = 0;
/* first, look for environment variables */
if ((value = _nc_getenv_num("LINES")) > 0) {
*linep = value;
}
if ((value = _nc_getenv_num("COLUMNS")) > 0) {
*colp = value;
}
T(("screen size: environment LINES = %d COLUMNS = %d", *linep, *colp));
#ifdef __EMX__
if (*linep <= 0 || *colp <= 0) {
int screendata[2];
_scrsize(screendata);
*colp = screendata[0];
*linep = screendata[1];
T(("EMX screen size: environment LINES = %d COLUMNS = %d",
*linep, *colp));
}
#endif
#if HAVE_SIZECHANGE
/* if that didn't work, maybe we can try asking the OS */
if (*linep <= 0 || *colp <= 0) {
if (isatty(cur_term->Filedes)) {
STRUCT_WINSIZE size;
errno = 0;
do {
if (ioctl(cur_term->Filedes, IOCTL_WINSIZE, &size) < 0
&& errno != EINTR)
goto failure;
} while
(errno == EINTR);
/*
* Solaris lets users override either dimension with an
* environment variable.
*/
if (*linep <= 0)
*linep = (sp != 0 && sp->_filtered) ? 1 : WINSIZE_ROWS(size);
if (*colp <= 0)
*colp = WINSIZE_COLS(size);
}
/* FALLTHRU */
failure:;
}
#endif /* HAVE_SIZECHANGE */
/* if we can't get dynamic info about the size, use static */
if (*linep <= 0) {
*linep = (int) lines;
}
if (*colp <= 0) {
*colp = (int) columns;
}
/* the ultimate fallback, assume fixed 24x80 size */
if (*linep <= 0) {
*linep = 24;
}
if (*colp <= 0) {
*colp = 80;
}
/*
* Put the derived values back in the screen-size caps, so
* tigetnum() and tgetnum() will do the right thing.
*/
lines = (short) (*linep);
columns = (short) (*colp);
}
T(("screen size is %dx%d", *linep, *colp));
if (VALID_NUMERIC(init_tabs))
my_tabsize = (int) init_tabs;
else
my_tabsize = 8;
#if USE_REENTRANT
if (sp != 0)
sp->_TABSIZE = my_tabsize;
#else
TABSIZE = my_tabsize;
#endif
T(("TABSIZE = %d", TABSIZE));
}
#if USE_SIZECHANGE
NCURSES_EXPORT(void)
_nc_update_screensize(SCREEN *sp)
{
TERMINAL *termp = cur_term;
int old_lines = lines;
int new_lines;
int old_cols = columns;
int new_cols;
_nc_get_screensize(sp, &new_lines, &new_cols);
/*
* See is_term_resized() and resizeterm().
* We're doing it this way because those functions belong to the upper
* ncurses library, while this resides in the lower terminfo library.
*/
if (sp != 0
&& sp->_resize != 0) {
if ((new_lines != old_lines) || (new_cols != old_cols))
sp->_resize(new_lines, new_cols);
sp->_sig_winch = FALSE;
}
}
#endif
/****************************************************************************
*
* Terminal setup
*
****************************************************************************/
#define ret_error(code, fmt, arg) if (errret) {\
*errret = code;\
returnCode(ERR);\
} else {\
fprintf(stderr, fmt, arg);\
exit(EXIT_FAILURE);\
}
#define ret_error0(code, msg) if (errret) {\
*errret = code;\
returnCode(ERR);\
} else {\
fprintf(stderr, msg);\
exit(EXIT_FAILURE);\
}
#if USE_DATABASE || USE_TERMCAP
/*
* Return 1 if entry found, 0 if not found, -1 if database not accessible,
* just like tgetent().
*/
static int
grab_entry(const char *const tn, TERMTYPE *const tp)
{
char filename[PATH_MAX];
int status = _nc_read_entry(tn, filename, tp);
/*
* If we have an entry, force all of the cancelled strings to null
* pointers so we don't have to test them in the rest of the library.
* (The terminfo compiler bypasses this logic, since it must know if
* a string is cancelled, for merging entries).
*/
if (status == TGETENT_YES) {
unsigned n;
for_each_boolean(n, tp) {
if (!VALID_BOOLEAN(tp->Booleans[n]))
tp->Booleans[n] = FALSE;
}
for_each_string(n, tp) {
if (tp->Strings[n] == CANCELLED_STRING)
tp->Strings[n] = ABSENT_STRING;
}
}
return (status);
}
#endif
/*
** do_prototype()
**
** Take the real command character out of the CC environment variable
** and substitute it in for the prototype given in 'command_character'.
*/
static void
do_prototype(TERMINAL * termp)
{
unsigned i;
char CC;
char proto;
char *tmp;
if ((tmp = getenv("CC")) != 0) {
if ((CC = *tmp) != 0) {
proto = *command_character;
for_each_string(i, &(termp->type)) {
for (tmp = termp->type.Strings[i]; *tmp; tmp++) {
if (*tmp == proto)
*tmp = CC;
}
}
}
}
}
/*
* Find the locale which is in effect.
*/
NCURSES_EXPORT(char *)
_nc_get_locale(void)
{
char *env;
#if HAVE_LOCALE_H
/*
* This is preferable to using getenv() since it ensures that we are using
* the locale which was actually initialized by the application.
*/
env = setlocale(LC_CTYPE, 0);
#else
if (((env = getenv("LC_ALL")) != 0 && *env != '\0')
|| ((env = getenv("LC_CTYPE")) != 0 && *env != '\0')
|| ((env = getenv("LANG")) != 0 && *env != '\0')) {
;
}
#endif
T(("_nc_get_locale %s", _nc_visbuf(env)));
return env;
}
/*
* Check if we are running in a UTF-8 locale.
*/
NCURSES_EXPORT(int)
_nc_unicode_locale(void)
{
int result = 0;
#if HAVE_LANGINFO_CODESET
char *env = nl_langinfo(CODESET);
result = !strcmp(env, "UTF-8");
T(("_nc_unicode_locale(%s) ->%d", env, result));
#else
char *env = _nc_get_locale();
if (env != 0) {
if (strstr(env, ".UTF-8") != 0) {
result = 1;
T(("_nc_unicode_locale(%s) ->%d", env, result));
}
}
#endif
return result;
}
#define CONTROL_N(s) ((s) != 0 && strstr(s, "\016") != 0)
#define CONTROL_O(s) ((s) != 0 && strstr(s, "\017") != 0)
/*
* Check for known broken cases where a UTF-8 locale breaks the alternate
* character set.
*/
NCURSES_EXPORT(int)
_nc_locale_breaks_acs(TERMINAL * termp)
{
char *env;
if ((env = getenv("NCURSES_NO_UTF8_ACS")) != 0) {
return atoi(env);
} else if ((env = getenv("TERM")) != 0) {
if (strstr(env, "linux"))
return 1; /* always broken */
if (strstr(env, "screen") != 0
&& ((env = getenv("TERMCAP")) != 0
&& strstr(env, "screen") != 0)
&& strstr(env, "hhII00") != 0) {
if (CONTROL_N(enter_alt_charset_mode) ||
CONTROL_O(enter_alt_charset_mode) ||
CONTROL_N(set_attributes) ||
CONTROL_O(set_attributes))
return 1;
}
}
return 0;
}
/*
* This entrypoint is called from tgetent() to allow a special case of reusing
* the same TERMINAL data (see comment).
*/
NCURSES_EXPORT(int)
_nc_setupterm(NCURSES_CONST char *tname, int Filedes, int *errret, bool reuse)
{
TERMINAL *termp;
int status;
START_TRACE();
T((T_CALLED("setupterm(%s,%d,%p)"), _nc_visbuf(tname), Filedes, errret));
if (tname == 0) {
tname = getenv("TERM");
if (tname == 0 || *tname == '\0') {
ret_error0(TGETENT_ERR, "TERM environment variable not set.\n");
}
}
if (strlen(tname) > MAX_NAME_SIZE) {
ret_error(TGETENT_ERR,
"TERM environment must be <= %d characters.\n",
MAX_NAME_SIZE);
}
T(("your terminal name is %s", tname));
/*
* Allow output redirection. This is what SVr3 does. If stdout is
* directed to a file, screen updates go to standard error.
*/
if (Filedes == STDOUT_FILENO && !isatty(Filedes))
Filedes = STDERR_FILENO;
/*
* Check if we have already initialized to use this terminal. If so, we
* do not need to re-read the terminfo entry, or obtain TTY settings.
*
* This is an improvement on SVr4 curses. If an application mixes curses
* and termcap calls, it may call both initscr and tgetent. This is not
* really a good thing to do, but can happen if someone tries using ncurses
* with the readline library. The problem we are fixing is that when
* tgetent calls setupterm, the resulting Ottyb struct in cur_term is
* zeroed. A subsequent call to endwin uses the zeroed terminal settings
* rather than the ones saved in initscr. So we check if cur_term appears
* to contain terminal settings for the same output file as our current
* call - and copy those terminal settings. (SVr4 curses does not do this,
* however applications that are working around the problem will still work
* properly with this feature).
*/
if (reuse
&& (termp = cur_term) != 0
&& termp->Filedes == Filedes
&& termp->_termname != 0
&& !strcmp(termp->_termname, tname)
&& _nc_name_match(termp->type.term_names, tname, "|")) {
T(("reusing existing terminal information and mode-settings"));
} else {
termp = typeCalloc(TERMINAL, 1);
if (termp == 0) {
ret_error0(TGETENT_ERR,
"Not enough memory to create terminal structure.\n");
}
#if USE_DATABASE || USE_TERMCAP
status = grab_entry(tname, &termp->type);
#else
status = TGETENT_NO;
#endif
/* try fallback list if entry on disk */
if (status != TGETENT_YES) {
const TERMTYPE *fallback = _nc_fallback(tname);
if (fallback) {
termp->type = *fallback;
status = TGETENT_YES;
}
}
if (status != TGETENT_YES) {
del_curterm(termp);
if (status == TGETENT_ERR) {
ret_error0(status, "terminals database is inaccessible\n");
} else if (status == TGETENT_NO) {
ret_error(status, "'%s': unknown terminal type.\n", tname);
}
}
#if !USE_REENTRANT
strncpy(ttytype, termp->type.term_names, NAMESIZE - 1);
ttytype[NAMESIZE - 1] = '\0';
#endif
termp->Filedes = Filedes;
termp->_termname = strdup(tname);
set_curterm(termp);
if (command_character && getenv("CC"))
do_prototype(termp);
/*
* If an application calls setupterm() rather than initscr() or
* newterm(), we will not have the def_prog_mode() call in
* _nc_setupscreen(). Do it now anyway, so we can initialize the
* baudrate.
*/
if (isatty(Filedes)) {
def_prog_mode();
baudrate();
}
}
/*
* We should always check the screensize, just in case.
*/
_nc_get_screensize(SP, ptrLines(), ptrCols());
if (errret)
*errret = TGETENT_YES;
if (generic_type) {
ret_error(TGETENT_NO, "'%s': I need something more specific.\n", tname);
}
if (hard_copy) {
ret_error(TGETENT_YES, "'%s': I can't handle hardcopy terminals.\n", tname);
}
returnCode(OK);
}
/*
* setupterm(termname, Filedes, errret)
*
* Find and read the appropriate object file for the terminal
* Make cur_term point to the structure.
*/
NCURSES_EXPORT(int)
setupterm(NCURSES_CONST char *tname, int Filedes, int *errret)
{
return _nc_setupterm(tname, Filedes, errret, FALSE);
}