/* $OpenBSD: lib_setup.c,v 1.5 1999/07/04 12:43:16 millert Exp $ */ /**************************************************************************** * Copyright (c) 1998 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 1992,1995 * * and: Eric S. Raymond * ****************************************************************************/ /* * Terminal setup routines common to termcap and terminfo: * * use_env(bool) * setupterm(char *, int, int *) */ #include #include /* for MAX_NAME_SIZE */ #include #if defined(SVR4_TERMIO) && !defined(_POSIX_SOURCE) #define _POSIX_SOURCE #endif #include /* lines, columns, cur_term */ MODULE_ID("$From: lib_setup.c,v 1.54 1999/07/04 01:37:32 tom Exp $") /**************************************************************************** * * Terminal size computation * ****************************************************************************/ #if HAVE_SIZECHANGE # if !defined(sun) || !TERMIOS # if HAVE_SYS_IOCTL_H # include # 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 # include #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 static int _use_env = TRUE; static void do_prototype(void); void use_env(bool f) { _use_env = f; } int LINES, COLS, TABSIZE; static void _nc_get_screensize(int *linep, int *colp) /* Obtain lines/columns values from the environment and/or terminfo entry */ { /* figure out the size of the screen */ T(("screen size: terminfo lines = %d columns = %d", lines, columns)); if (!_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 = 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 || *colp <= 0) if (lines > 0 && columns > 0) { *linep = (int)lines; *colp = (int)columns; } /* the ultimate fallback, assume fixed 24x80 size */ if (*linep <= 0 || *colp <= 0) { *linep = 24; *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 (init_tabs != -1) TABSIZE = (int)init_tabs; else TABSIZE = 8; T(("TABSIZE = %d", TABSIZE)); } #if USE_SIZECHANGE void _nc_update_screensize(void) { int my_lines, my_cols; _nc_get_screensize(&my_lines, &my_cols); if (SP != 0 && SP->_resize != 0) SP->_resize(my_lines, my_cols); } #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 static int grab_entry(const char *const tn, TERMTYPE *const tp) /* return 1 if entry found, 0 if not found, -1 if database not accessible */ { char filename[PATH_MAX]; int status; if ((status = _nc_read_entry(tn, filename, tp)) != 1) { #ifndef PURE_TERMINFO /* * Try falling back on the termcap file. * Note: allowing this call links the entire terminfo/termcap * compiler into the startup code. It's preferable to build a * real terminfo database and use that. */ status = _nc_read_termcap_entry(tn, tp); #endif /* PURE_TERMINFO */ } /* * 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 == 1) { int 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 char ttytype[NAMESIZE]; /* * setupterm(termname, Filedes, errret) * * Find and read the appropriate object file for the terminal * Make cur_term point to the structure. * */ int setupterm(NCURSES_CONST char *tname, int Filedes, int *errret) { struct term *term_ptr; int status; 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(-1, "TERM environment variable not set.\n"); } } if (strlen(tname) > MAX_NAME_SIZE) { ret_error(-1, "TERM environment must be <= %d characters.\n", MAX_NAME_SIZE); } T(("your terminal name is %s", tname)); term_ptr = typeCalloc(TERMINAL, 1); if (term_ptr == 0) { ret_error0(-1, "Not enough memory to create terminal structure.\n") ; } #if USE_DATABASE status = grab_entry(tname, &term_ptr->type); #else status = 0; #endif /* try fallback list if entry on disk */ if (status != 1) { const TERMTYPE *fallback = _nc_fallback(tname); if (fallback) { term_ptr->type = *fallback; status = 1; } } if (status == -1) { ret_error0(-1, "terminals database is inaccessible\n"); } else if (status == 0) { ret_error(0, "'%s': unknown terminal type.\n", tname); } /* * Improve 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 (cur_term != 0) { if (cur_term->Filedes == Filedes) term_ptr->Ottyb = cur_term->Ottyb; } set_curterm(term_ptr); if (command_character && getenv("CC")) do_prototype(); strlcpy(ttytype, cur_term->type.term_names, NAMESIZE); /* * 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; cur_term->Filedes = Filedes; _nc_get_screensize(&LINES, &COLS); if (errret) *errret = 1; T((T_CREATE("screen %s %dx%d"), tname, LINES, COLS)); if (generic_type) { ret_error(0, "'%s': I need something more specific.\n", tname); } if (hard_copy) { ret_error(1, "'%s': I can't handle hardcopy terminals.\n", tname); } returnCode(OK); } /* ** 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; } } }