1/**************************************************************************** 2 * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. * 3 * * 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: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 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. * 22 * * 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 * 26 * authorization. * 27 ****************************************************************************/ 28 29/**************************************************************************** 30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 31 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 32 * and: Thomas E. Dickey 1996-on * 33 ****************************************************************************/ 34 35/* 36** lib_newterm.c 37** 38** The newterm() function. 39** 40*/ 41 42#include <curses.priv.h> 43 44#if SVR4_TERMIO && !defined(_POSIX_SOURCE) 45#define _POSIX_SOURCE 46#endif 47 48#include <term.h> /* clear_screen, cup & friends, cur_term */ 49#include <tic.h> 50 51MODULE_ID("$Id: lib_newterm.c,v 1.73 2008/08/16 21:20:48 Werner.Fink Exp $") 52 53#ifndef ONLCR /* Allows compilation under the QNX 4.2 OS */ 54#define ONLCR 0 55#endif 56 57/* 58 * SVr4/XSI Curses specify that hardware echo is turned off in initscr, and not 59 * restored during the curses session. The library simulates echo in software. 60 * (The behavior is unspecified if the application enables hardware echo). 61 * 62 * The newterm function also initializes terminal settings, and since initscr 63 * is supposed to behave as if it calls newterm, we do it here. 64 */ 65static NCURSES_INLINE int 66_nc_initscr(void) 67{ 68 int result = ERR; 69 70 /* for extended XPG4 conformance requires cbreak() at this point */ 71 /* (SVr4 curses does this anyway) */ 72 if (cbreak() == OK) { 73 TTY buf; 74 75 buf = cur_term->Nttyb; 76#ifdef TERMIOS 77 buf.c_lflag &= ~(ECHO | ECHONL); 78 buf.c_iflag &= ~(ICRNL | INLCR | IGNCR); 79 buf.c_oflag &= ~(ONLCR); 80#elif HAVE_SGTTY_H 81 buf.sg_flags &= ~(ECHO | CRMOD); 82#else 83 memset(&buf, 0, sizeof(buf)); 84#endif 85 if ((result = _nc_set_tty_mode(&buf)) == OK) 86 cur_term->Nttyb = buf; 87 } 88 return result; 89} 90 91/* 92 * filter() has to be called before either initscr() or newterm(), so there is 93 * apparently no way to make this flag apply to some terminals and not others, 94 * aside from possibly delaying a filter() call until some terminals have been 95 * initialized. 96 */ 97NCURSES_EXPORT(void) 98filter(void) 99{ 100 START_TRACE(); 101 T((T_CALLED("filter"))); 102 _nc_prescreen.filter_mode = TRUE; 103 returnVoid; 104} 105 106#if NCURSES_EXT_FUNCS 107/* 108 * An extension, allowing the application to open a new screen without 109 * requiring it to also be filtered. 110 */ 111NCURSES_EXPORT(void) 112nofilter(void) 113{ 114 START_TRACE(); 115 T((T_CALLED("nofilter"))); 116 _nc_prescreen.filter_mode = FALSE; 117 returnVoid; 118} 119#endif 120 121NCURSES_EXPORT(SCREEN *) 122newterm(NCURSES_CONST char *name, FILE *ofp, FILE *ifp) 123{ 124 int value; 125 int errret; 126 SCREEN *current; 127 SCREEN *result = 0; 128 TERMINAL *its_term; 129 130 START_TRACE(); 131 T((T_CALLED("newterm(\"%s\",%p,%p)"), name, ofp, ifp)); 132 133 _nc_init_pthreads(); 134 _nc_lock_global(curses); 135 136 current = SP; 137 its_term = (SP ? SP->_term : 0); 138 139 /* this loads the capability entry, then sets LINES and COLS */ 140 if (setupterm(name, fileno(ofp), &errret) != ERR) { 141 int slk_format = _nc_globals.slk_format; 142 143 /* 144 * This actually allocates the screen structure, and saves the original 145 * terminal settings. 146 */ 147 _nc_set_screen(0); 148 149 /* allow user to set maximum escape delay from the environment */ 150 if ((value = _nc_getenv_num("ESCDELAY")) >= 0) { 151 set_escdelay(value); 152 } 153 154 if (_nc_setupscreen(LINES, 155 COLS, 156 ofp, 157 _nc_prescreen.filter_mode, 158 slk_format) == ERR) { 159 _nc_set_screen(current); 160 result = 0; 161 } else { 162 assert(SP != 0); 163 /* 164 * In setupterm() we did a set_curterm(), but it was before we set 165 * SP. So the "current" screen's terminal pointer was overwritten 166 * with a different terminal. Later, in _nc_setupscreen(), we set 167 * SP and the terminal pointer in the new screen. 168 * 169 * Restore the terminal-pointer for the pre-existing screen, if 170 * any. 171 */ 172 if (current) 173 current->_term = its_term; 174 175 /* if the terminal type has real soft labels, set those up */ 176 if (slk_format && num_labels > 0 && SLK_STDFMT(slk_format)) 177 _nc_slk_initialize(stdscr, COLS); 178 179 SP->_ifd = fileno(ifp); 180 typeahead(fileno(ifp)); 181#ifdef TERMIOS 182 SP->_use_meta = ((cur_term->Ottyb.c_cflag & CSIZE) == CS8 && 183 !(cur_term->Ottyb.c_iflag & ISTRIP)); 184#else 185 SP->_use_meta = FALSE; 186#endif 187 SP->_endwin = FALSE; 188 189 /* 190 * Check whether we can optimize scrolling under dumb terminals in 191 * case we do not have any of these capabilities, scrolling 192 * optimization will be useless. 193 */ 194 SP->_scrolling = ((scroll_forward && scroll_reverse) || 195 ((parm_rindex || 196 parm_insert_line || 197 insert_line) && 198 (parm_index || 199 parm_delete_line || 200 delete_line))); 201 202 baudrate(); /* sets a field in the SP structure */ 203 204 SP->_keytry = 0; 205 206 /* 207 * Check for mismatched graphic-rendition capabilities. Most SVr4 208 * terminfo trees contain entries that have rmul or rmso equated to 209 * sgr0 (Solaris curses copes with those entries). We do this only 210 * for curses, since many termcap applications assume that 211 * smso/rmso and smul/rmul are paired, and will not function 212 * properly if we remove rmso or rmul. Curses applications 213 * shouldn't be looking at this detail. 214 */ 215#define SGR0_TEST(mode) (mode != 0) && (exit_attribute_mode == 0 || strcmp(mode, exit_attribute_mode)) 216 SP->_use_rmso = SGR0_TEST(exit_standout_mode); 217 SP->_use_rmul = SGR0_TEST(exit_underline_mode); 218 219 /* compute movement costs so we can do better move optimization */ 220 _nc_mvcur_init(); 221 222 /* initialize terminal to a sane state */ 223 _nc_screen_init(); 224 225 /* Initialize the terminal line settings. */ 226 _nc_initscr(); 227 228 _nc_signal_handler(TRUE); 229 230 result = SP; 231 } 232 } 233 _nc_unlock_global(curses); 234 returnSP(result); 235} 236