1 /* $NetBSD: setterm.c,v 1.50 2013/05/05 14:24:05 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 1.50 2013/05/05 14:24:05 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 (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 terminfo 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 /* If no scrolling commands, no quick change. */ 131 screen->noqch = 132 (t_change_scroll_region(screen->term) == NULL || 133 t_cursor_home(screen->term) == NULL || 134 (t_parm_index(screen->term) == NULL && 135 t_scroll_forward(screen->term) == NULL) || 136 (t_parm_rindex(screen->term) == NULL && 137 t_scroll_reverse(screen->term) == NULL)) && 138 ((t_parm_insert_line(screen->term) == NULL && 139 t_insert_line(screen->term) == NULL) || 140 (t_parm_delete_line(screen->term) == NULL && 141 t_delete_line(screen->term) == NULL)); 142 143 /* 144 * Precalculate conflict info for color/attribute end commands. 145 */ 146 #ifndef HAVE_WCHAR 147 screen->mask_op = __ATTRIBUTES & ~__COLOR; 148 #else 149 screen->mask_op = WA_ATTRIBUTES & ~__COLOR; 150 #endif /* HAVE_WCHAR */ 151 if (t_orig_pair(screen->term) != NULL) { 152 if (does_esc_m(t_orig_pair(screen->term))) 153 screen->mask_op &= 154 ~(__STANDOUT | __UNDERSCORE | __TERMATTR); 155 else { 156 if (t_exit_standout_mode(screen->term) != NULL && 157 !strcmp(t_orig_pair(screen->term), 158 t_exit_standout_mode(screen->term))) 159 screen->mask_op &= ~__STANDOUT; 160 if (t_exit_underline_mode(screen->term) != NULL && 161 !strcmp(t_orig_pair(screen->term), 162 t_exit_underline_mode(screen->term))) 163 screen->mask_op &= ~__UNDERSCORE; 164 if (t_exit_attribute_mode(screen->term) != NULL && 165 !strcmp(t_orig_pair(screen->term), 166 t_exit_attribute_mode(screen->term))) 167 screen->mask_op &= ~__TERMATTR; 168 } 169 } 170 /* 171 * Assume that "me" turns off all attributes apart from ACS. 172 * It might turn off ACS, so check for that. 173 */ 174 if (t_exit_attribute_mode(screen->term) != NULL && 175 does_ctrl_o(t_exit_attribute_mode(screen->term), 176 t_exit_alt_charset_mode(screen->term))) 177 screen->mask_me = 0; 178 else 179 screen->mask_me = __ALTCHARSET; 180 181 /* Check what turning off the attributes also turns off */ 182 #ifndef HAVE_WCHAR 183 screen->mask_ue = __ATTRIBUTES & ~__UNDERSCORE; 184 #else 185 screen->mask_ue = WA_ATTRIBUTES & ~__UNDERSCORE; 186 #endif /* HAVE_WCHAR */ 187 if (t_exit_underline_mode(screen->term) != NULL) { 188 if (does_esc_m(t_exit_underline_mode(screen->term))) 189 screen->mask_ue &= 190 ~(__STANDOUT | __TERMATTR | __COLOR); 191 else { 192 if (t_exit_standout_mode(screen->term) != NULL && 193 !strcmp(t_exit_underline_mode(screen->term), 194 t_exit_standout_mode(screen->term))) 195 screen->mask_ue &= ~__STANDOUT; 196 if (t_exit_attribute_mode(screen->term) != NULL && 197 !strcmp(t_exit_underline_mode(screen->term), 198 t_exit_attribute_mode(screen->term))) 199 screen->mask_ue &= ~__TERMATTR; 200 if (t_orig_pair(screen->term) != NULL && 201 !strcmp(t_exit_underline_mode(screen->term), 202 t_orig_pair(screen->term))) 203 screen->mask_ue &= ~__COLOR; 204 } 205 } 206 #ifndef HAVE_WCHAR 207 screen->mask_se = __ATTRIBUTES & ~__STANDOUT; 208 #else 209 screen->mask_se = WA_ATTRIBUTES & ~__STANDOUT; 210 #endif /* HAVE_WCHAR */ 211 if (t_exit_standout_mode(screen->term) != NULL) { 212 if (does_esc_m(t_exit_standout_mode(screen->term))) 213 screen->mask_se &= 214 ~(__UNDERSCORE | __TERMATTR | __COLOR); 215 else { 216 if (t_exit_underline_mode(screen->term) != NULL && 217 !strcmp(t_exit_standout_mode(screen->term), 218 t_exit_underline_mode(screen->term))) 219 screen->mask_se &= ~__UNDERSCORE; 220 if (t_exit_attribute_mode(screen->term) != NULL && 221 !strcmp(t_exit_standout_mode(screen->term), 222 t_exit_attribute_mode(screen->term))) 223 screen->mask_se &= ~__TERMATTR; 224 if (t_orig_pair(screen->term) != NULL && 225 !strcmp(t_exit_standout_mode(screen->term), 226 t_orig_pair(screen->term))) 227 screen->mask_se &= ~__COLOR; 228 } 229 } 230 231 return (unknown ? ERR : OK); 232 } 233 234 /* 235 * _cursesi_resetterm -- 236 * Copy the terminal instance data for the given screen to the global 237 * variables. 238 */ 239 void 240 _cursesi_resetterm(SCREEN *screen) 241 { 242 243 LINES = screen->LINES; 244 COLS = screen->COLS; 245 __GT = screen->GT; 246 247 __noqch = screen->noqch; 248 __mask_op = screen->mask_op; 249 __mask_me = screen->mask_me; 250 __mask_ue = screen->mask_ue; 251 __mask_se = screen->mask_se; 252 253 set_curterm(screen->term); 254 } 255 256 /* 257 * does_esc_m -- 258 * A hack for xterm-like terminals where "\E[m" or "\E[0m" will turn off 259 * other attributes, so we check for this in the capability passed to us. 260 * Note that we can't just do simple string comparison, as the capability 261 * may contain multiple, ';' separated sequence parts. 262 */ 263 static int 264 does_esc_m(const char *cap) 265 { 266 #define WAITING 0 267 #define PARSING 1 268 #define NUMBER 2 269 #define FOUND 4 270 const char *capptr; 271 int seq; 272 273 #ifdef DEBUG 274 __CTRACE(__CTRACE_INIT, "does_esc_m: Checking %s\n", cap); 275 #endif 276 /* Is it just "\E[m" or "\E[0m"? */ 277 if (!strcmp(cap, "\x1b[m") || !strcmp(cap, "\x1b[0m")) 278 return 1; 279 280 /* Does it contain a "\E[...m" sequence? */ 281 if (strlen(cap) < 4) 282 return 0; 283 capptr = cap; 284 seq = WAITING; 285 while (*capptr != 0) { 286 switch (seq) { 287 /* Start of sequence */ 288 case WAITING: 289 if (!strncmp(capptr, "\x1b[", 2)) { 290 capptr+=2; 291 if (*capptr == 'm') 292 return 1; 293 else { 294 seq=PARSING; 295 continue; 296 } 297 } 298 break; 299 /* Looking for '0' */ 300 case PARSING: 301 if (*capptr == '0') 302 seq=FOUND; 303 else if (*capptr > '0' && *capptr <= '9') 304 seq=NUMBER; 305 else if (*capptr != ';') 306 seq=WAITING; 307 break; 308 /* Some other number */ 309 case NUMBER: 310 if (*capptr == ';') 311 seq=PARSING; 312 else if (!(*capptr >= '0' && *capptr <= '9')) 313 seq=WAITING; 314 break; 315 /* Found a '0' */ 316 case FOUND: 317 if (*capptr == 'm') 318 return 1; 319 else if (!((*capptr >= '0' && *capptr <= '9') || 320 *capptr == ';')) 321 seq=WAITING; 322 break; 323 default: 324 break; 325 } 326 capptr++; 327 } 328 return 0; 329 } 330 331 /* 332 * does_ctrl_o -- 333 * A hack for vt100/xterm-like terminals where the "me" capability also 334 * unsets acs. 335 */ 336 static int 337 does_ctrl_o(const char *exit_cap, const char *acs_cap) 338 { 339 const char *eptr = exit_cap, *aptr = acs_cap; 340 int l; 341 342 #ifdef DEBUG 343 __CTRACE(__CTRACE_INIT, "does_ctrl_o: Testing %s for %s\n", eptr, aptr); 344 #endif 345 l = strlen(acs_cap); 346 while (*eptr != 0) { 347 if (!strncmp(eptr, aptr, l)) 348 return 1; 349 eptr++; 350 } 351 return 0; 352 } 353