1 /* $NetBSD: setterm.c,v 1.54 2016/01/09 19:05:13 jdc Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)setterm.c 8.8 (Berkeley) 10/25/94"; 36 #else 37 __RCSID("$NetBSD: setterm.c,v 1.54 2016/01/09 19:05:13 jdc Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/ioctl.h> /* TIOCGWINSZ on old systems. */ 42 43 #include <stdlib.h> 44 #include <string.h> 45 #include <termios.h> 46 #include <unistd.h> 47 48 #include "curses.h" 49 #include "curses_private.h" 50 51 static int does_esc_m(const char *cap); 52 static int does_ctrl_o(const char *exit_cap, const char *acs_cap); 53 54 attr_t __mask_op, __mask_me, __mask_ue, __mask_se; 55 56 int 57 setterm(char *type) 58 { 59 return _cursesi_setterm(type, _cursesi_screen); 60 } 61 62 int 63 _cursesi_setterm(char *type, SCREEN *screen) 64 { 65 int unknown, r; 66 struct winsize win; 67 char *p; 68 69 if (type[0] == '\0') 70 type = "xx"; 71 unknown = 0; 72 if (screen->term) 73 del_curterm(screen->term); 74 (void)ti_setupterm(&screen->term, type, fileno(screen->outfd), &r); 75 if (screen->term == NULL) { 76 unknown++; 77 (void)ti_setupterm(&screen->term, "dumb", 78 fileno(screen->outfd), &r); 79 /* No dumb term? We can't continue */ 80 if (screen->term == NULL) 81 return ERR; 82 } 83 #ifdef DEBUG 84 __CTRACE(__CTRACE_INIT, "setterm: tty = %s\n", type); 85 #endif 86 87 /* Try TIOCGWINSZ, and, if it fails, the terminfo entry. */ 88 if (ioctl(fileno(screen->outfd), TIOCGWINSZ, &win) != -1 && 89 win.ws_row != 0 && win.ws_col != 0) { 90 screen->LINES = win.ws_row; 91 screen->COLS = win.ws_col; 92 } else { 93 if (unknown) { 94 screen->LINES = -1; 95 screen->COLS = -1; 96 } else { 97 screen->LINES = t_lines(screen->term); 98 screen->COLS = t_columns(screen->term); 99 } 100 } 101 102 /* POSIX 1003.2 requires that the environment override. */ 103 if ((p = getenv("LINES")) != NULL) 104 screen->LINES = (int) strtol(p, NULL, 0); 105 if ((p = getenv("COLUMNS")) != NULL) 106 screen->COLS = (int) strtol(p, NULL, 0); 107 if ((p = getenv("ESCDELAY")) != NULL) 108 ESCDELAY = (int) strtol(p, NULL, 0); 109 if ((p = getenv("TABSIZE")) != NULL) 110 screen->TABSIZE = (int) strtol(p, NULL, 0); 111 else if (t_init_tabs(screen->term) >= 0) 112 screen->TABSIZE = (int) t_init_tabs(screen->term); 113 else 114 screen->TABSIZE = 8; 115 /* 116 * Want cols > 4, otherwise things will fail. 117 */ 118 if (screen->COLS <= 4) 119 return (ERR); 120 121 LINES = screen->LINES; 122 COLS = screen->COLS; 123 TABSIZE = screen->TABSIZE; 124 125 #ifdef DEBUG 126 __CTRACE(__CTRACE_INIT, 127 "setterm: LINES = %d, COLS = %d, TABSIZE = %d\n", 128 LINES, COLS, TABSIZE); 129 #endif 130 131 /* 132 * set the pad char, only take the first char of the pc capability 133 * as this is all we can use. 134 */ 135 screen->padchar = t_pad_char(screen->term) ? 136 t_pad_char(screen->term)[0] : 0; 137 138 /* If no scrolling commands, no quick change. */ 139 screen->noqch = 140 (t_change_scroll_region(screen->term) == NULL || 141 t_cursor_home(screen->term) == NULL || 142 (t_parm_index(screen->term) == NULL && 143 t_scroll_forward(screen->term) == NULL) || 144 (t_parm_rindex(screen->term) == NULL && 145 t_scroll_reverse(screen->term) == NULL)) && 146 ((t_parm_insert_line(screen->term) == NULL && 147 t_insert_line(screen->term) == NULL) || 148 (t_parm_delete_line(screen->term) == NULL && 149 t_delete_line(screen->term) == NULL)); 150 151 /* 152 * Precalculate conflict info for color/attribute end commands. 153 */ 154 #ifndef HAVE_WCHAR 155 screen->mask_op = __ATTRIBUTES & ~__COLOR; 156 #else 157 screen->mask_op = WA_ATTRIBUTES & ~__COLOR; 158 #endif /* HAVE_WCHAR */ 159 if (t_orig_pair(screen->term) != NULL) { 160 if (does_esc_m(t_orig_pair(screen->term))) 161 screen->mask_op &= 162 ~(__STANDOUT | __UNDERSCORE | __TERMATTR); 163 else { 164 if (t_exit_standout_mode(screen->term) != NULL && 165 !strcmp(t_orig_pair(screen->term), 166 t_exit_standout_mode(screen->term))) 167 screen->mask_op &= ~__STANDOUT; 168 if (t_exit_underline_mode(screen->term) != NULL && 169 !strcmp(t_orig_pair(screen->term), 170 t_exit_underline_mode(screen->term))) 171 screen->mask_op &= ~__UNDERSCORE; 172 if (t_exit_attribute_mode(screen->term) != NULL && 173 !strcmp(t_orig_pair(screen->term), 174 t_exit_attribute_mode(screen->term))) 175 screen->mask_op &= ~__TERMATTR; 176 } 177 } 178 /* 179 * Assume that "me" turns off all attributes apart from ACS. 180 * It might turn off ACS, so check for that. 181 */ 182 if (t_exit_attribute_mode(screen->term) != NULL && 183 t_exit_alt_charset_mode(screen->term) != NULL && 184 does_ctrl_o(t_exit_attribute_mode(screen->term), 185 t_exit_alt_charset_mode(screen->term))) 186 screen->mask_me = 0; 187 else 188 screen->mask_me = __ALTCHARSET; 189 190 /* Check what turning off the attributes also turns off */ 191 #ifndef HAVE_WCHAR 192 screen->mask_ue = __ATTRIBUTES & ~__UNDERSCORE; 193 #else 194 screen->mask_ue = WA_ATTRIBUTES & ~__UNDERSCORE; 195 #endif /* HAVE_WCHAR */ 196 if (t_exit_underline_mode(screen->term) != NULL) { 197 if (does_esc_m(t_exit_underline_mode(screen->term))) 198 screen->mask_ue &= 199 ~(__STANDOUT | __TERMATTR | __COLOR); 200 else { 201 if (t_exit_standout_mode(screen->term) != NULL && 202 !strcmp(t_exit_underline_mode(screen->term), 203 t_exit_standout_mode(screen->term))) 204 screen->mask_ue &= ~__STANDOUT; 205 if (t_exit_attribute_mode(screen->term) != NULL && 206 !strcmp(t_exit_underline_mode(screen->term), 207 t_exit_attribute_mode(screen->term))) 208 screen->mask_ue &= ~__TERMATTR; 209 if (t_orig_pair(screen->term) != NULL && 210 !strcmp(t_exit_underline_mode(screen->term), 211 t_orig_pair(screen->term))) 212 screen->mask_ue &= ~__COLOR; 213 } 214 } 215 #ifndef HAVE_WCHAR 216 screen->mask_se = __ATTRIBUTES & ~__STANDOUT; 217 #else 218 screen->mask_se = WA_ATTRIBUTES & ~__STANDOUT; 219 #endif /* HAVE_WCHAR */ 220 if (t_exit_standout_mode(screen->term) != NULL) { 221 if (does_esc_m(t_exit_standout_mode(screen->term))) 222 screen->mask_se &= 223 ~(__UNDERSCORE | __TERMATTR | __COLOR); 224 else { 225 if (t_exit_underline_mode(screen->term) != NULL && 226 !strcmp(t_exit_standout_mode(screen->term), 227 t_exit_underline_mode(screen->term))) 228 screen->mask_se &= ~__UNDERSCORE; 229 if (t_exit_attribute_mode(screen->term) != NULL && 230 !strcmp(t_exit_standout_mode(screen->term), 231 t_exit_attribute_mode(screen->term))) 232 screen->mask_se &= ~__TERMATTR; 233 if (t_orig_pair(screen->term) != NULL && 234 !strcmp(t_exit_standout_mode(screen->term), 235 t_orig_pair(screen->term))) 236 screen->mask_se &= ~__COLOR; 237 } 238 } 239 240 return (unknown ? ERR : OK); 241 } 242 243 /* 244 * _cursesi_resetterm -- 245 * Copy the terminal instance data for the given screen to the global 246 * variables. 247 */ 248 void 249 _cursesi_resetterm(SCREEN *screen) 250 { 251 252 LINES = screen->LINES; 253 COLS = screen->COLS; 254 TABSIZE = screen->TABSIZE; 255 __GT = screen->GT; 256 257 __noqch = screen->noqch; 258 __mask_op = screen->mask_op; 259 __mask_me = screen->mask_me; 260 __mask_ue = screen->mask_ue; 261 __mask_se = screen->mask_se; 262 263 set_curterm(screen->term); 264 } 265 266 /* 267 * does_esc_m -- 268 * A hack for xterm-like terminals where "\E[m" or "\E[0m" will turn off 269 * other attributes, so we check for this in the capability passed to us. 270 * Note that we can't just do simple string comparison, as the capability 271 * may contain multiple, ';' separated sequence parts. 272 */ 273 static int 274 does_esc_m(const char *cap) 275 { 276 #define WAITING 0 277 #define PARSING 1 278 #define NUMBER 2 279 #define FOUND 4 280 const char *capptr; 281 int seq; 282 283 #ifdef DEBUG 284 __CTRACE(__CTRACE_INIT, "does_esc_m: Checking %s\n", cap); 285 #endif 286 /* Is it just "\E[m" or "\E[0m"? */ 287 if (!strcmp(cap, "\x1b[m") || !strcmp(cap, "\x1b[0m")) 288 return 1; 289 290 /* Does it contain a "\E[...m" sequence? */ 291 if (strlen(cap) < 4) 292 return 0; 293 capptr = cap; 294 seq = WAITING; 295 while (*capptr != 0) { 296 switch (seq) { 297 /* Start of sequence */ 298 case WAITING: 299 if (!strncmp(capptr, "\x1b[", 2)) { 300 capptr+=2; 301 if (*capptr == 'm') 302 return 1; 303 else { 304 seq=PARSING; 305 continue; 306 } 307 } 308 break; 309 /* Looking for '0' */ 310 case PARSING: 311 if (*capptr == '0') 312 seq=FOUND; 313 else if (*capptr > '0' && *capptr <= '9') 314 seq=NUMBER; 315 else if (*capptr != ';') 316 seq=WAITING; 317 break; 318 /* Some other number */ 319 case NUMBER: 320 if (*capptr == ';') 321 seq=PARSING; 322 else if (!(*capptr >= '0' && *capptr <= '9')) 323 seq=WAITING; 324 break; 325 /* Found a '0' */ 326 case FOUND: 327 if (*capptr == 'm') 328 return 1; 329 else if (!((*capptr >= '0' && *capptr <= '9') || 330 *capptr == ';')) 331 seq=WAITING; 332 break; 333 default: 334 break; 335 } 336 capptr++; 337 } 338 return 0; 339 } 340 341 /* 342 * does_ctrl_o -- 343 * A hack for vt100/xterm-like terminals where the "me" capability also 344 * unsets acs. 345 */ 346 static int 347 does_ctrl_o(const char *exit_cap, const char *acs_cap) 348 { 349 const char *eptr = exit_cap, *aptr = acs_cap; 350 int l; 351 352 #ifdef DEBUG 353 __CTRACE(__CTRACE_INIT, "does_ctrl_o: Testing %s for %s\n", eptr, aptr); 354 #endif 355 l = strlen(acs_cap); 356 while (*eptr != 0) { 357 if (!strncmp(eptr, aptr, l)) 358 return 1; 359 eptr++; 360 } 361 return 0; 362 } 363