1 /* $NetBSD: setterm.c,v 1.46 2010/02/03 15:34:40 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 1.46 2010/02/03 15:34:40 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 strlcpy(screen->ttytype, screen->term->desc, 136 sizeof(screen->ttytype)); 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 does_ctrl_o(t_exit_attribute_mode(screen->term))) 184 screen->mask_me = 0; 185 else 186 screen->mask_me = __ALTCHARSET; 187 188 /* Check what turning off the attributes also turns off */ 189 #ifndef HAVE_WCHAR 190 screen->mask_ue = __ATTRIBUTES & ~__UNDERSCORE; 191 #else 192 screen->mask_ue = WA_ATTRIBUTES & ~__UNDERSCORE; 193 #endif /* HAVE_WCHAR */ 194 if (t_exit_underline_mode(screen->term) != NULL) { 195 if (does_esc_m(t_exit_underline_mode(screen->term))) 196 screen->mask_ue &= 197 ~(__STANDOUT | __TERMATTR | __COLOR); 198 else { 199 if (t_exit_standout_mode(screen->term) != NULL && 200 !strcmp(t_exit_underline_mode(screen->term), 201 t_exit_standout_mode(screen->term))) 202 screen->mask_ue &= ~__STANDOUT; 203 if (t_exit_attribute_mode(screen->term) != NULL && 204 !strcmp(t_exit_underline_mode(screen->term), 205 t_exit_attribute_mode(screen->term))) 206 screen->mask_ue &= ~__TERMATTR; 207 if (t_orig_pair(screen->term) != NULL && 208 !strcmp(t_exit_underline_mode(screen->term), 209 t_orig_pair(screen->term))) 210 screen->mask_ue &= ~__COLOR; 211 } 212 } 213 #ifndef HAVE_WCHAR 214 screen->mask_se = __ATTRIBUTES & ~__STANDOUT; 215 #else 216 screen->mask_se = WA_ATTRIBUTES & ~__STANDOUT; 217 #endif /* HAVE_WCHAR */ 218 if (t_exit_standout_mode(screen->term) != NULL) { 219 if (does_esc_m(t_exit_standout_mode(screen->term))) 220 screen->mask_se &= 221 ~(__UNDERSCORE | __TERMATTR | __COLOR); 222 else { 223 if (t_exit_underline_mode(screen->term) != NULL && 224 !strcmp(t_exit_standout_mode(screen->term), 225 t_exit_underline_mode(screen->term))) 226 screen->mask_se &= ~__UNDERSCORE; 227 if (t_exit_attribute_mode(screen->term) != NULL && 228 !strcmp(t_exit_standout_mode(screen->term), 229 t_exit_attribute_mode(screen->term))) 230 screen->mask_se &= ~__TERMATTR; 231 if (t_orig_pair(screen->term) != NULL && 232 !strcmp(t_exit_standout_mode(screen->term), 233 t_orig_pair(screen->term))) 234 screen->mask_se &= ~__COLOR; 235 } 236 } 237 238 return (unknown ? ERR : OK); 239 } 240 241 /* 242 * _cursesi_resetterm -- 243 * Copy the terminal instance data for the given screen to the global 244 * variables. 245 */ 246 void 247 _cursesi_resetterm(SCREEN *screen) 248 { 249 250 LINES = screen->LINES; 251 COLS = screen->COLS; 252 __GT = screen->GT; 253 254 __noqch = screen->noqch; 255 __mask_op = screen->mask_op; 256 __mask_me = screen->mask_me; 257 __mask_ue = screen->mask_ue; 258 __mask_se = screen->mask_se; 259 260 set_curterm(screen->term); 261 } 262 263 /* 264 * does_esc_m -- 265 * A hack for xterm-like terminals where "\E[m" or "\E[0m" will turn off 266 * other attributes, so we check for this in the capability passed to us. 267 * Note that we can't just do simple string comparison, as the capability 268 * may contain multiple, ';' separated sequence parts. 269 */ 270 static int 271 does_esc_m(const char *cap) 272 { 273 #define WAITING 0 274 #define PARSING 1 275 #define NUMBER 2 276 #define FOUND 4 277 const char *capptr; 278 int seq; 279 280 #ifdef DEBUG 281 __CTRACE(__CTRACE_INIT, "does_esc_m: Checking %s\n", cap); 282 #endif 283 /* Is it just "\E[m" or "\E[0m"? */ 284 if (!strcmp(cap, "\x1b[m") || !strcmp(cap, "\x1b[0m")) 285 return 1; 286 287 /* Does it contain a "\E[...m" sequence? */ 288 if (strlen(cap) < 4) 289 return 0; 290 capptr = cap; 291 seq = WAITING; 292 while (*capptr != 0) { 293 switch (seq) { 294 /* Start of sequence */ 295 case WAITING: 296 if (!strncmp(capptr, "\x1b[", 2)) { 297 capptr+=2; 298 if (*capptr == 'm') 299 return 1; 300 else { 301 seq=PARSING; 302 continue; 303 } 304 } 305 break; 306 /* Looking for '0' */ 307 case PARSING: 308 if (*capptr == '0') 309 seq=FOUND; 310 else if (*capptr > '0' && *capptr <= '9') 311 seq=NUMBER; 312 else if (*capptr != ';') 313 seq=WAITING; 314 break; 315 /* Some other number */ 316 case NUMBER: 317 if (*capptr == ';') 318 seq=PARSING; 319 else if (!(*capptr >= '0' && *capptr <= '9')) 320 seq=WAITING; 321 break; 322 /* Found a '0' */ 323 case FOUND: 324 if (*capptr == 'm') 325 return 1; 326 else if (!((*capptr >= '0' && *capptr <= '9') || 327 *capptr == ';')) 328 seq=WAITING; 329 break; 330 default: 331 break; 332 } 333 capptr++; 334 } 335 return 0; 336 } 337 338 /* 339 * does_ctrl_o -- 340 * A hack for vt100/xterm-like terminals where the "me" capability also 341 * unsets acs (i.e. it contains the character '\017'). 342 */ 343 static int 344 does_ctrl_o(const char *cap) 345 { 346 const char *capptr = cap; 347 348 #ifdef DEBUG 349 __CTRACE(__CTRACE_INIT, "does_ctrl_o: Looping on %s\n", capptr); 350 #endif 351 while (*capptr != 0) { 352 if (*capptr == '\x0f') 353 return 1; 354 capptr++; 355 } 356 return 0; 357 } 358