diff options
Diffstat (limited to 'ncurses/tinfo/lib_setup.c')
| -rw-r--r-- | ncurses/tinfo/lib_setup.c | 618 |
1 files changed, 618 insertions, 0 deletions
diff --git a/ncurses/tinfo/lib_setup.c b/ncurses/tinfo/lib_setup.c new file mode 100644 index 000000000000..08cb783c5942 --- /dev/null +++ b/ncurses/tinfo/lib_setup.c @@ -0,0 +1,618 @@ +/**************************************************************************** + * 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 1.105 2008/05/03 22:41:42 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 + +/* + * 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) +NCURSES_PUBLIC_VAR(LINES) (void) +{ + return (SP ? SP->_LINES : _nc_prescreen._LINES); +} +NCURSES_EXPORT(int) +NCURSES_PUBLIC_VAR(COLS) (void) +{ + return SP ? SP->_COLS : _nc_prescreen._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 */ +{ + 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) +{ + 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(void) +{ + int i; + char CC; + char proto; + char *tmp; + + tmp = getenv("CC"); + CC = *tmp; + proto = *command_character; + + for_each_string(i, &(cur_term->type)) { + for (tmp = cur_term->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(void) +{ + 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) +{ + 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 + && cur_term != 0 + && cur_term->Filedes == Filedes + && cur_term->_termname != 0 + && !strcmp(cur_term->_termname, tname) + && _nc_name_match(cur_term->type.term_names, tname, "|")) { + T(("reusing existing terminal information and mode-settings")); + } else { + TERMINAL *term_ptr; + + term_ptr = typeCalloc(TERMINAL, 1); + + if (term_ptr == 0) { + ret_error0(TGETENT_ERR, + "Not enough memory to create terminal structure.\n"); + } +#if USE_DATABASE || USE_TERMCAP + status = grab_entry(tname, &term_ptr->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) { + term_ptr->type = *fallback; + status = TGETENT_YES; + } + } + + if (status != TGETENT_YES) { + del_curterm(term_ptr); + 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); + } + } + + set_curterm(term_ptr); + + if (command_character && getenv("CC")) + do_prototype(); + +#if !USE_REENTRANT + strncpy(ttytype, cur_term->type.term_names, NAMESIZE - 1); + ttytype[NAMESIZE - 1] = '\0'; +#endif + + cur_term->Filedes = Filedes; + cur_term->_termname = strdup(tname); + + /* + * 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. + */ +#if USE_REENTRANT + _nc_get_screensize(SP, + SP ? &(SP->_LINES) : &(_nc_prescreen._LINES), + SP ? &(SP->_COLS) : &(_nc_prescreen._COLS)); +#else + _nc_get_screensize(SP, &LINES, &COLS); +#endif + + 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); +} |