1 /* $OpenBSD: lib_newterm.c,v 1.14 2023/10/17 09:52:08 nicm Exp $ */ 2 3 /**************************************************************************** 4 * Copyright 2018-2020,2022 Thomas E. Dickey * 5 * Copyright 1998-2016,2017 Free Software Foundation, Inc. * 6 * * 7 * Permission is hereby granted, free of charge, to any person obtaining a * 8 * copy of this software and associated documentation files (the * 9 * "Software"), to deal in the Software without restriction, including * 10 * without limitation the rights to use, copy, modify, merge, publish, * 11 * distribute, distribute with modifications, sublicense, and/or sell * 12 * copies of the Software, and to permit persons to whom the Software is * 13 * furnished to do so, subject to the following conditions: * 14 * * 15 * The above copyright notice and this permission notice shall be included * 16 * in all copies or substantial portions of the Software. * 17 * * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 25 * * 26 * Except as contained in this notice, the name(s) of the above copyright * 27 * holders shall not be used in advertising or otherwise to promote the * 28 * sale, use or other dealings in this Software without prior written * 29 * authorization. * 30 ****************************************************************************/ 31 32 /**************************************************************************** 33 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 34 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 35 * and: Thomas E. Dickey 1996-on * 36 * and: Juergen Pfeifer 2009 * 37 ****************************************************************************/ 38 39 /* 40 ** lib_newterm.c 41 ** 42 ** The newterm() function. 43 ** 44 */ 45 46 #include <curses.priv.h> 47 48 #ifndef CUR 49 #define CUR SP_TERMTYPE 50 #endif 51 52 #include <tic.h> 53 54 MODULE_ID("$Id: lib_newterm.c,v 1.14 2023/10/17 09:52:08 nicm Exp $") 55 56 #ifdef USE_TERM_DRIVER 57 #define NumLabels InfoOf(SP_PARM).numlabels 58 #else 59 #define NumLabels num_labels 60 #endif 61 62 #ifndef ONLCR /* Allows compilation under the QNX 4.2 OS */ 63 #define ONLCR 0 64 #endif 65 66 /* 67 * SVr4/XSI Curses specify that hardware echo is turned off in initscr, and not 68 * restored during the curses session. The library simulates echo in software. 69 * (The behavior is unspecified if the application enables hardware echo). 70 * 71 * The newterm function also initializes terminal settings, and since initscr 72 * is supposed to behave as if it calls newterm, we do it here. 73 */ 74 static NCURSES_INLINE int 75 _nc_initscr(NCURSES_SP_DCL0) 76 { 77 int result = ERR; 78 TERMINAL *term = TerminalOf(SP_PARM); 79 80 /* for extended XPG4 conformance requires cbreak() at this point */ 81 /* (SVr4 curses does this anyway) */ 82 T((T_CALLED("_nc_initscr(%p) ->term %p"), (void *) SP_PARM, (void *) term)); 83 if (NCURSES_SP_NAME(cbreak) (NCURSES_SP_ARG) == OK) { 84 TTY buf; 85 86 buf = term->Nttyb; 87 #ifdef TERMIOS 88 buf.c_lflag &= (unsigned) ~(ECHO | ECHONL); 89 buf.c_iflag &= (unsigned) ~(ICRNL | INLCR | IGNCR); 90 buf.c_oflag &= (unsigned) ~(ONLCR); 91 #elif HAVE_SGTTY_H 92 buf.sg_flags &= ~(ECHO | CRMOD); 93 #elif defined(EXP_WIN32_DRIVER) 94 buf.dwFlagIn = CONMODE_IN_DEFAULT; 95 buf.dwFlagOut = CONMODE_OUT_DEFAULT | VT_FLAG_OUT; 96 if (WINCONSOLE.isTermInfoConsole) { 97 buf.dwFlagIn |= VT_FLAG_IN; 98 } 99 #else 100 memset(&buf, 0, sizeof(buf)); 101 #endif 102 result = NCURSES_SP_NAME(_nc_set_tty_mode) (NCURSES_SP_ARGx &buf); 103 if (result == OK) 104 term->Nttyb = buf; 105 } 106 returnCode(result); 107 } 108 109 /* 110 * filter() has to be called before either initscr() or newterm(), so there is 111 * apparently no way to make this flag apply to some terminals and not others, 112 * aside from possibly delaying a filter() call until some terminals have been 113 * initialized. 114 */ 115 NCURSES_EXPORT(void) 116 NCURSES_SP_NAME(filter) (NCURSES_SP_DCL0) 117 { 118 START_TRACE(); 119 T((T_CALLED("filter(%p)"), (void *) SP_PARM)); 120 #if NCURSES_SP_FUNCS 121 if (IsPreScreen(SP_PARM)) { 122 SP_PARM->_filtered = TRUE; 123 } 124 #else 125 _nc_prescreen.filter_mode = TRUE; 126 #endif 127 returnVoid; 128 } 129 130 #if NCURSES_SP_FUNCS 131 NCURSES_EXPORT(void) 132 filter(void) 133 { 134 START_TRACE(); 135 T((T_CALLED("filter()"))); 136 _nc_prescreen.filter_mode = TRUE; 137 returnVoid; 138 } 139 #endif 140 141 #if NCURSES_EXT_FUNCS 142 /* 143 * An extension, allowing the application to open a new screen without 144 * requiring it to also be filtered. 145 */ 146 NCURSES_EXPORT(void) 147 NCURSES_SP_NAME(nofilter) (NCURSES_SP_DCL0) 148 { 149 START_TRACE(); 150 T((T_CALLED("nofilter(%p)"), (void *) SP_PARM)); 151 #if NCURSES_SP_FUNCS 152 if (IsPreScreen(SP_PARM)) { 153 SP_PARM->_filtered = FALSE; 154 } 155 #else 156 _nc_prescreen.filter_mode = FALSE; 157 #endif 158 returnVoid; 159 } 160 161 #if NCURSES_SP_FUNCS 162 NCURSES_EXPORT(void) 163 nofilter(void) 164 { 165 START_TRACE(); 166 T((T_CALLED("nofilter()"))); 167 _nc_prescreen.filter_mode = FALSE; 168 returnVoid; 169 } 170 #endif 171 #endif /* NCURSES_EXT_FUNCS */ 172 173 NCURSES_EXPORT(SCREEN *) 174 NCURSES_SP_NAME(newterm) (NCURSES_SP_DCLx 175 const char *name, 176 FILE *ofp, 177 FILE *ifp) 178 { 179 int errret; 180 SCREEN *result = 0; 181 SCREEN *current; 182 TERMINAL *its_term; 183 FILE *_ofp = ofp ? ofp : stdout; 184 FILE *_ifp = ifp ? ifp : stdin; 185 TERMINAL *new_term = 0; 186 187 START_TRACE(); 188 T((T_CALLED("newterm(%p, \"%s\", %p,%p)"), 189 (void *) SP_PARM, 190 (name ? name : ""), 191 (void *) ofp, 192 (void *) ifp)); 193 194 #if NCURSES_SP_FUNCS 195 assert(SP_PARM != 0); 196 if (SP_PARM == 0) 197 returnSP(SP_PARM); 198 #endif 199 200 _nc_init_pthreads(); 201 _nc_lock_global(curses); 202 203 current = CURRENT_SCREEN; 204 its_term = (current ? current->_term : 0); 205 206 #if defined(EXP_WIN32_DRIVER) 207 _setmode(fileno(_ifp), _O_BINARY); 208 _setmode(fileno(_ofp), _O_BINARY); 209 #endif 210 211 INIT_TERM_DRIVER(); 212 /* this loads the capability entry, then sets LINES and COLS */ 213 if ( 214 TINFO_SETUP_TERM(&new_term, name, 215 fileno(_ofp), &errret, FALSE) != ERR) { 216 int slk_format; 217 int filter_mode; 218 219 _nc_set_screen(0); 220 #ifdef USE_TERM_DRIVER 221 assert(new_term != 0); 222 #endif 223 224 #if NCURSES_SP_FUNCS 225 slk_format = SP_PARM->slk_format; 226 filter_mode = SP_PARM->_filtered; 227 #else 228 slk_format = _nc_globals.slk_format; 229 filter_mode = _nc_prescreen.filter_mode; 230 #endif 231 232 /* 233 * This actually allocates the screen structure, and saves the original 234 * terminal settings. 235 */ 236 if (NCURSES_SP_NAME(_nc_setupscreen) ( 237 #if NCURSES_SP_FUNCS 238 &SP_PARM, 239 #endif 240 *(ptrLines(SP_PARM)), 241 *(ptrCols(SP_PARM)), 242 _ofp, 243 filter_mode, 244 slk_format) == ERR) { 245 _nc_set_screen(current); 246 result = 0; 247 } else { 248 int value; 249 int cols; 250 251 #ifdef USE_TERM_DRIVER 252 TERMINAL_CONTROL_BLOCK *TCB; 253 #elif !NCURSES_SP_FUNCS 254 _nc_set_screen(CURRENT_SCREEN); 255 #endif 256 assert(SP_PARM != 0); 257 cols = *(ptrCols(SP_PARM)); 258 #ifdef USE_TERM_DRIVER 259 _nc_set_screen(SP_PARM); 260 TCB = (TERMINAL_CONTROL_BLOCK *) new_term; 261 TCB->csp = SP_PARM; 262 #endif 263 /* 264 * In setupterm() we did a set_curterm(), but it was before we set 265 * CURRENT_SCREEN. So the "current" screen's terminal pointer was 266 * overwritten with a different terminal. Later, in 267 * _nc_setupscreen(), we set CURRENT_SCREEN and the terminal 268 * pointer in the new screen. 269 * 270 * Restore the terminal-pointer for the pre-existing screen, if 271 * any. 272 */ 273 if (current) 274 current->_term = its_term; 275 276 #ifdef USE_TERM_DRIVER 277 SP_PARM->_term = new_term; 278 #else 279 new_term = SP_PARM->_term; 280 #endif 281 282 /* allow user to set maximum escape delay from the environment */ 283 if ((value = _nc_getenv_num("ESCDELAY")) >= 0) { 284 #if NCURSES_EXT_FUNCS 285 NCURSES_SP_NAME(set_escdelay) (NCURSES_SP_ARGx value); 286 #else 287 ESCDELAY = value; 288 #endif 289 } 290 291 /* if the terminal type has real soft labels, set those up */ 292 if (slk_format && NumLabels > 0 && SLK_STDFMT(slk_format)) 293 _nc_slk_initialize(StdScreen(SP_PARM), cols); 294 295 SP_PARM->_ifd = fileno(_ifp); 296 NCURSES_SP_NAME(typeahead) (NCURSES_SP_ARGx fileno(_ifp)); 297 #ifdef TERMIOS 298 SP_PARM->_use_meta = ((new_term->Ottyb.c_cflag & CSIZE) == CS8 && 299 !(new_term->Ottyb.c_iflag & ISTRIP)) || 300 USE_KLIBC_KBD; 301 #else 302 SP_PARM->_use_meta = FALSE; 303 #endif 304 SP_PARM->_endwin = ewInitial; 305 #ifndef USE_TERM_DRIVER 306 /* 307 * Check whether we can optimize scrolling under dumb terminals in 308 * case we do not have any of these capabilities, scrolling 309 * optimization will be useless. 310 */ 311 SP_PARM->_scrolling = ((scroll_forward && scroll_reverse) || 312 ((parm_rindex || 313 parm_insert_line || 314 insert_line) && 315 (parm_index || 316 parm_delete_line || 317 delete_line))); 318 #endif 319 320 NCURSES_SP_NAME(baudrate) (NCURSES_SP_ARG); /* sets a field in the screen structure */ 321 322 SP_PARM->_keytry = 0; 323 324 /* compute movement costs so we can do better move optimization */ 325 #ifdef USE_TERM_DRIVER 326 TCBOf(SP_PARM)->drv->td_scinit(SP_PARM); 327 #else /* ! USE_TERM_DRIVER */ 328 /* 329 * Check for mismatched graphic-rendition capabilities. Most SVr4 330 * terminfo trees contain entries that have rmul or rmso equated to 331 * sgr0 (Solaris curses copes with those entries). We do this only 332 * for curses, since many termcap applications assume that 333 * smso/rmso and smul/rmul are paired, and will not function 334 * properly if we remove rmso or rmul. Curses applications 335 * shouldn't be looking at this detail. 336 */ 337 #define SGR0_TEST(mode) (mode != 0) && (exit_attribute_mode == 0 || strcmp(mode, exit_attribute_mode)) 338 SP_PARM->_use_rmso = SGR0_TEST(exit_standout_mode); 339 SP_PARM->_use_rmul = SGR0_TEST(exit_underline_mode); 340 #if USE_ITALIC 341 SP_PARM->_use_ritm = SGR0_TEST(exit_italics_mode); 342 #endif 343 344 /* compute movement costs so we can do better move optimization */ 345 _nc_mvcur_init(); 346 347 /* initialize terminal to a sane state */ 348 _nc_screen_init(); 349 #endif /* USE_TERM_DRIVER */ 350 351 /* Initialize the terminal line settings. */ 352 _nc_initscr(NCURSES_SP_ARG); 353 354 _nc_signal_handler(TRUE); 355 result = SP_PARM; 356 } 357 } 358 _nc_unlock_global(curses); 359 returnSP(result); 360 } 361 362 #if NCURSES_SP_FUNCS 363 NCURSES_EXPORT(SCREEN *) 364 newterm(const char *name, FILE *ofp, FILE *ifp) 365 { 366 SCREEN *rc; 367 368 _nc_init_pthreads(); 369 _nc_lock_global(prescreen); 370 START_TRACE(); 371 rc = NCURSES_SP_NAME(newterm) (CURRENT_SCREEN_PRE, name, ofp, ifp); 372 _nc_forget_prescr(); 373 _nc_unlock_global(prescreen); 374 375 return rc; 376 } 377 #endif 378