/**************************************************************************** * 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 #if defined(SVR4_TERMIO) && !defined(_POSIX_SOURCE) #define _POSIX_SOURCE #endif #include /* lines, columns, cur_term */ MODULE_ID("$Id: lib_setup.c,v 1.37 1998/02/11 12:13:56 tom Exp $") /**************************************************************************** * * Terminal size computation * ****************************************************************************/ #if HAVE_SIZECHANGE # if !defined(sun) || !HAVE_TERMIOS_H # 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 extern TERMINAL *cur_term; 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 */ { char *rows, *cols; /* 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 */ { *linep = *colp = 0; /* first, look for environment variables */ rows = getenv("LINES"); if (rows != 0) *linep = atoi(rows); cols = getenv("COLUMNS"); if (cols != 0) *colp = atoi(cols); T(("screen size: environment LINES = %d COLUMNS = %d",*linep,*colp)); #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); *linep = WINSIZE_ROWS(size); *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)); #ifdef init_tabs if (init_tabs != -1) TABSIZE = (int)init_tabs; else #endif /* init_tabs */ 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) return(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 */ 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(const char *tname, int Filedes, int *errret) { struct term *term_ptr; int status; T((T_CALLED("setupterm(\"%s\",%d,%p)"), tname, Filedes, errret)); if (tname == 0) { tname = getenv("TERM"); if (tname == 0 || *tname == '\0') ret_error0(-1, "TERM environment variable not set.\n"); } 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) { memcpy(&term_ptr->type, fallback, sizeof(TERMTYPE)); 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); } set_curterm(term_ptr); if (command_character && getenv("CC")) do_prototype(); strncpy(ttytype, cur_term->type.term_names, NAMESIZE - 1); ttytype[NAMESIZE - 1] = '\0'; /* * 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, j; char CC; char proto; char *tmp; tmp = getenv("CC"); CC = *tmp; proto = *command_character; for (i=0; i < STRCOUNT; i++) { j = 0; while (cur_term->type.Strings[i][j]) { if (cur_term->type.Strings[i][j] == proto) cur_term->type.Strings[i][j] = CC; j++; } } }