1 /* $NetBSD: setterm.c,v 1.47 2010/02/11 11:45:47 roy 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 1.47 2010/02/11 11:45:47 roy 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 *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 (void)ti_setupterm(&screen->term, type, fileno(screen->outfd), &r); 73 if (screen->term == NULL) { 74 unknown++; 75 (void)ti_setupterm(&screen->term, "dumb", 76 fileno(screen->outfd), &r); 77 /* No dumb term? We can't continue */ 78 if (screen->term == NULL) 79 return ERR; 80 } 81 #ifdef DEBUG 82 __CTRACE(__CTRACE_INIT, "setterm: tty = %s\n", type); 83 #endif 84 85 /* Try TIOCGWINSZ, and, if it fails, the termcap entry. */ 86 if (ioctl(fileno(screen->outfd), TIOCGWINSZ, &win) != -1 && 87 win.ws_row != 0 && win.ws_col != 0) { 88 screen->LINES = win.ws_row; 89 screen->COLS = win.ws_col; 90 } else { 91 if (unknown) { 92 screen->LINES = -1; 93 screen->COLS = -1; 94 } else { 95 screen->LINES = t_lines(screen->term); 96 screen->COLS = t_columns(screen->term); 97 } 98 99 } 100 101 /* POSIX 1003.2 requires that the environment override. */ 102 if ((p = getenv("LINES")) != NULL) 103 screen->LINES = (int) strtol(p, NULL, 0); 104 if ((p = getenv("COLUMNS")) != NULL) 105 screen->COLS = (int) strtol(p, NULL, 0); 106 if ((p = getenv("ESCDELAY")) != NULL) 107 ESCDELAY = (int) strtol(p, NULL, 0); 108 109 /* 110 * Want cols > 4, otherwise things will fail. 111 */ 112 if (screen->COLS <= 4) 113 return (ERR); 114 115 LINES = screen->LINES; 116 COLS = screen->COLS; 117 118 #ifdef DEBUG 119 __CTRACE(__CTRACE_INIT, "setterm: LINES = %d, COLS = %d\n", 120 LINES, COLS); 121 #endif 122 123 /* 124 * set the pad char, only take the first char of the pc capability 125 * as this is all we can use. 126 */ 127 screen->padchar = t_pad_char(screen->term) ? 128 t_pad_char(screen->term)[0] : 0; 129 130 /* Get full name of terminal */ 131 if (unknown) { 132 strcpy(screen->ttytype, "dumb"); 133 return ERR; 134 } 135 if (screen->term->desc == NULL) 136 screen->ttytype[0] = '\0'; 137 else 138 strlcpy(screen->ttytype, screen->term->desc, 139 sizeof(screen->ttytype)); 140 141 /* If no scrolling commands, no quick change. */ 142 screen->noqch = 143 (t_change_scroll_region(screen->term) == NULL || 144 t_cursor_home(screen->term) == NULL || 145 (t_parm_index(screen->term) == NULL && 146 t_scroll_forward(screen->term) == NULL) || 147 (t_parm_rindex(screen->term) == NULL && 148 t_scroll_reverse(screen->term) == NULL)) && 149 ((t_parm_insert_line(screen->term) == NULL && 150 t_insert_line(screen->term) == NULL) || 151 (t_parm_delete_line(screen->term) == NULL && 152 t_delete_line(screen->term) == NULL)); 153 154 /* 155 * Precalculate conflict info for color/attribute end commands. 156 */ 157 #ifndef HAVE_WCHAR 158 screen->mask_op = __ATTRIBUTES & ~__COLOR; 159 #else 160 screen->mask_op = WA_ATTRIBUTES & ~__COLOR; 161 #endif /* HAVE_WCHAR */ 162 if (t_orig_pair(screen->term) != NULL) { 163 if (does_esc_m(t_orig_pair(screen->term))) 164 screen->mask_op &= 165 ~(__STANDOUT | __UNDERSCORE | __TERMATTR); 166 else { 167 if (t_exit_standout_mode(screen->term) != NULL && 168 !strcmp(t_orig_pair(screen->term), 169 t_exit_standout_mode(screen->term))) 170 screen->mask_op &= ~__STANDOUT; 171 if (t_exit_underline_mode(screen->term) != NULL && 172 !strcmp(t_orig_pair(screen->term), 173 t_exit_underline_mode(screen->term))) 174 screen->mask_op &= ~__UNDERSCORE; 175 if (t_exit_attribute_mode(screen->term) != NULL && 176 !strcmp(t_orig_pair(screen->term), 177 t_exit_attribute_mode(screen->term))) 178 screen->mask_op &= ~__TERMATTR; 179 } 180 } 181 /* 182 * Assume that "me" turns off all attributes apart from ACS. 183 * It might turn off ACS, so check for that. 184 */ 185 if (t_exit_attribute_mode(screen->term) != NULL && 186 does_ctrl_o(t_exit_attribute_mode(screen->term))) 187 screen->mask_me = 0; 188 else 189 screen->mask_me = __ALTCHARSET; 190 191 /* Check what turning off the attributes also turns off */ 192 #ifndef HAVE_WCHAR 193 screen->mask_ue = __ATTRIBUTES & ~__UNDERSCORE; 194 #else 195 screen->mask_ue = WA_ATTRIBUTES & ~__UNDERSCORE; 196 #endif /* HAVE_WCHAR */ 197 if (t_exit_underline_mode(screen->term) != NULL) { 198 if (does_esc_m(t_exit_underline_mode(screen->term))) 199 screen->mask_ue &= 200 ~(__STANDOUT | __TERMATTR | __COLOR); 201 else { 202 if (t_exit_standout_mode(screen->term) != NULL && 203 !strcmp(t_exit_underline_mode(screen->term), 204 t_exit_standout_mode(screen->term))) 205 screen->mask_ue &= ~__STANDOUT; 206 if (t_exit_attribute_mode(screen->term) != NULL && 207 !strcmp(t_exit_underline_mode(screen->term), 208 t_exit_attribute_mode(screen->term))) 209 screen->mask_ue &= ~__TERMATTR; 210 if (t_orig_pair(screen->term) != NULL && 211 !strcmp(t_exit_underline_mode(screen->term), 212 t_orig_pair(screen->term))) 213 screen->mask_ue &= ~__COLOR; 214 } 215 } 216 #ifndef HAVE_WCHAR 217 screen->mask_se = __ATTRIBUTES & ~__STANDOUT; 218 #else 219 screen->mask_se = WA_ATTRIBUTES & ~__STANDOUT; 220 #endif /* HAVE_WCHAR */ 221 if (t_exit_standout_mode(screen->term) != NULL) { 222 if (does_esc_m(t_exit_standout_mode(screen->term))) 223 screen->mask_se &= 224 ~(__UNDERSCORE | __TERMATTR | __COLOR); 225 else { 226 if (t_exit_underline_mode(screen->term) != NULL && 227 !strcmp(t_exit_standout_mode(screen->term), 228 t_exit_underline_mode(screen->term))) 229 screen->mask_se &= ~__UNDERSCORE; 230 if (t_exit_attribute_mode(screen->term) != NULL && 231 !strcmp(t_exit_standout_mode(screen->term), 232 t_exit_attribute_mode(screen->term))) 233 screen->mask_se &= ~__TERMATTR; 234 if (t_orig_pair(screen->term) != NULL && 235 !strcmp(t_exit_standout_mode(screen->term), 236 t_orig_pair(screen->term))) 237 screen->mask_se &= ~__COLOR; 238 } 239 } 240 241 return (unknown ? ERR : OK); 242 } 243 244 /* 245 * _cursesi_resetterm -- 246 * Copy the terminal instance data for the given screen to the global 247 * variables. 248 */ 249 void 250 _cursesi_resetterm(SCREEN *screen) 251 { 252 253 LINES = screen->LINES; 254 COLS = screen->COLS; 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 (i.e. it contains the character '\017'). 345 */ 346 static int 347 does_ctrl_o(const char *cap) 348 { 349 const char *capptr = cap; 350 351 #ifdef DEBUG 352 __CTRACE(__CTRACE_INIT, "does_ctrl_o: Looping on %s\n", capptr); 353 #endif 354 while (*capptr != 0) { 355 if (*capptr == '\x0f') 356 return 1; 357 capptr++; 358 } 359 return 0; 360 } 361