text: /* $OpenBSD$ */
  
  /*
   * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
   * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
   * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  #include <sys/types.h>
  
  #ifdef HAVE_CURSES_H
  #include <curses.h>
  #else
  #include <ncurses.h>
  #endif
  #include <fnmatch.h>
  #include <stdlib.h>
  #include <string.h>
  #include <term.h>
  
  #include "tmux.h"
  
  void	 tty_term_override(struct tty_term *, const char *);
  char	*tty_term_strip(const char *);
  
  struct tty_terms tty_terms = LIST_HEAD_INITIALIZER(tty_terms);
  
  const struct tty_term_code_entry tty_term_codes[NTTYCODE] = {
  	{ TTYC_ACSC, TTYCODE_STRING, "acsc" },
  	{ TTYC_AX, TTYCODE_FLAG, "AX" },
  	{ TTYC_BCE, TTYCODE_FLAG, "bce" },
  	{ TTYC_BEL, TTYCODE_STRING, "bel" },
  	{ TTYC_BLINK, TTYCODE_STRING, "blink" },
  	{ TTYC_BOLD, TTYCODE_STRING, "bold" },
  	{ TTYC_CIVIS, TTYCODE_STRING, "civis" },
  	{ TTYC_CLEAR, TTYCODE_STRING, "clear" },
  	{ TTYC_CNORM, TTYCODE_STRING, "cnorm" },
  	{ TTYC_COLORS, TTYCODE_NUMBER, "colors" },
  	{ TTYC_CR, TTYCODE_STRING, "Cr" },
  	{ TTYC_CS, TTYCODE_STRING, "Cs" },
  	{ TTYC_CSR, TTYCODE_STRING, "csr" },
  	{ TTYC_CUB, TTYCODE_STRING, "cub" },
  	{ TTYC_CUB1, TTYCODE_STRING, "cub1" },
  	{ TTYC_CUD, TTYCODE_STRING, "cud" },
  	{ TTYC_CUD1, TTYCODE_STRING, "cud1" },
  	{ TTYC_CUF, TTYCODE_STRING, "cuf" },
  	{ TTYC_CUF1, TTYCODE_STRING, "cuf1" },
  	{ TTYC_CUP, TTYCODE_STRING, "cup" },
  	{ TTYC_CUU, TTYCODE_STRING, "cuu" },
  	{ TTYC_CUU1, TTYCODE_STRING, "cuu1" },
  	{ TTYC_CVVIS, TTYCODE_STRING, "cvvis" },
  	{ TTYC_DCH, TTYCODE_STRING, "dch" },
  	{ TTYC_DCH1, TTYCODE_STRING, "dch1" },
  	{ TTYC_DIM, TTYCODE_STRING, "dim" },
  	{ TTYC_DL, TTYCODE_STRING, "dl" },
  	{ TTYC_DL1, TTYCODE_STRING, "dl1" },
  	{ TTYC_E3, TTYCODE_STRING, "E3" },
  	{ TTYC_ECH, TTYCODE_STRING, "ech" },
  	{ TTYC_EL, TTYCODE_STRING, "el" },
  	{ TTYC_EL1, TTYCODE_STRING, "el1" },
  	{ TTYC_ENACS, TTYCODE_STRING, "enacs" },
  	{ TTYC_FSL, TTYCODE_STRING, "fsl" },
  	{ TTYC_HOME, TTYCODE_STRING, "home" },
  	{ TTYC_HPA, TTYCODE_STRING, "hpa" },
  	{ TTYC_ICH, TTYCODE_STRING, "ich" },
  	{ TTYC_ICH1, TTYCODE_STRING, "ich1" },
  	{ TTYC_IL, TTYCODE_STRING, "il" },
  	{ TTYC_IL1, TTYCODE_STRING, "il1" },
  	{ TTYC_INVIS, TTYCODE_STRING, "invis" },
  	{ TTYC_IS1, TTYCODE_STRING, "is1" },
  	{ TTYC_IS2, TTYCODE_STRING, "is2" },
  	{ TTYC_IS3, TTYCODE_STRING, "is3" },
  	{ TTYC_KCBT, TTYCODE_STRING, "kcbt" },
  	{ TTYC_KCUB1, TTYCODE_STRING, "kcub1" },
  	{ TTYC_KCUD1, TTYCODE_STRING, "kcud1" },
  	{ TTYC_KCUF1, TTYCODE_STRING, "kcuf1" },
  	{ TTYC_KCUU1, TTYCODE_STRING, "kcuu1" },
  	{ TTYC_KDC2, TTYCODE_STRING, "kDC" },
  	{ TTYC_KDC3, TTYCODE_STRING, "kDC3" },
  	{ TTYC_KDC4, TTYCODE_STRING, "kDC4" },
  	{ TTYC_KDC5, TTYCODE_STRING, "kDC5" },
  	{ TTYC_KDC6, TTYCODE_STRING, "kDC6" },
  	{ TTYC_KDC7, TTYCODE_STRING, "kDC7" },
  	{ TTYC_KDCH1, TTYCODE_STRING, "kdch1" },
  	{ TTYC_KDN2, TTYCODE_STRING, "kDN" },
  	{ TTYC_KDN3, TTYCODE_STRING, "kDN3" },
  	{ TTYC_KDN4, TTYCODE_STRING, "kDN4" },
  	{ TTYC_KDN5, TTYCODE_STRING, "kDN5" },
  	{ TTYC_KDN6, TTYCODE_STRING, "kDN6" },
  	{ TTYC_KDN7, TTYCODE_STRING, "kDN7" },
  	{ TTYC_KEND, TTYCODE_STRING, "kend" },
  	{ TTYC_KEND2, TTYCODE_STRING, "kEND" },
  	{ TTYC_KEND3, TTYCODE_STRING, "kEND3" },
  	{ TTYC_KEND4, TTYCODE_STRING, "kEND4" },
  	{ TTYC_KEND5, TTYCODE_STRING, "kEND5" },
  	{ TTYC_KEND6, TTYCODE_STRING, "kEND6" },
  	{ TTYC_KEND7, TTYCODE_STRING, "kEND7" },
  	{ TTYC_KF1, TTYCODE_STRING, "kf1" },
  	{ TTYC_KF10, TTYCODE_STRING, "kf10" },
  	{ TTYC_KF11, TTYCODE_STRING, "kf11" },
  	{ TTYC_KF12, TTYCODE_STRING, "kf12" },
  	{ TTYC_KF13, TTYCODE_STRING, "kf13" },
  	{ TTYC_KF14, TTYCODE_STRING, "kf14" },
  	{ TTYC_KF15, TTYCODE_STRING, "kf15" },
  	{ TTYC_KF16, TTYCODE_STRING, "kf16" },
  	{ TTYC_KF17, TTYCODE_STRING, "kf17" },
  	{ TTYC_KF18, TTYCODE_STRING, "kf18" },
  	{ TTYC_KF19, TTYCODE_STRING, "kf19" },
  	{ TTYC_KF2, TTYCODE_STRING, "kf2" },
  	{ TTYC_KF20, TTYCODE_STRING, "kf20" },
  	{ TTYC_KF21, TTYCODE_STRING, "kf21" },
  	{ TTYC_KF22, TTYCODE_STRING, "kf22" },
  	{ TTYC_KF23, TTYCODE_STRING, "kf23" },
  	{ TTYC_KF24, TTYCODE_STRING, "kf24" },
  	{ TTYC_KF25, TTYCODE_STRING, "kf25" },
  	{ TTYC_KF26, TTYCODE_STRING, "kf26" },
  	{ TTYC_KF27, TTYCODE_STRING, "kf27" },
  	{ TTYC_KF28, TTYCODE_STRING, "kf28" },
  	{ TTYC_KF29, TTYCODE_STRING, "kf29" },
  	{ TTYC_KF3, TTYCODE_STRING, "kf3" },
  	{ TTYC_KF30, TTYCODE_STRING, "kf30" },
  	{ TTYC_KF31, TTYCODE_STRING, "kf31" },
  	{ TTYC_KF32, TTYCODE_STRING, "kf32" },
  	{ TTYC_KF33, TTYCODE_STRING, "kf33" },
  	{ TTYC_KF34, TTYCODE_STRING, "kf34" },
  	{ TTYC_KF35, TTYCODE_STRING, "kf35" },
  	{ TTYC_KF36, TTYCODE_STRING, "kf36" },
  	{ TTYC_KF37, TTYCODE_STRING, "kf37" },
  	{ TTYC_KF38, TTYCODE_STRING, "kf38" },
  	{ TTYC_KF39, TTYCODE_STRING, "kf39" },
  	{ TTYC_KF4, TTYCODE_STRING, "kf4" },
  	{ TTYC_KF40, TTYCODE_STRING, "kf40" },
  	{ TTYC_KF41, TTYCODE_STRING, "kf41" },
  	{ TTYC_KF42, TTYCODE_STRING, "kf42" },
  	{ TTYC_KF43, TTYCODE_STRING, "kf43" },
  	{ TTYC_KF44, TTYCODE_STRING, "kf44" },
  	{ TTYC_KF45, TTYCODE_STRING, "kf45" },
  	{ TTYC_KF46, TTYCODE_STRING, "kf46" },
  	{ TTYC_KF47, TTYCODE_STRING, "kf47" },
  	{ TTYC_KF48, TTYCODE_STRING, "kf48" },
  	{ TTYC_KF49, TTYCODE_STRING, "kf49" },
  	{ TTYC_KF5, TTYCODE_STRING, "kf5" },
  	{ TTYC_KF50, TTYCODE_STRING, "kf50" },
  	{ TTYC_KF51, TTYCODE_STRING, "kf51" },
  	{ TTYC_KF52, TTYCODE_STRING, "kf52" },
  	{ TTYC_KF53, TTYCODE_STRING, "kf53" },
  	{ TTYC_KF54, TTYCODE_STRING, "kf54" },
  	{ TTYC_KF55, TTYCODE_STRING, "kf55" },
  	{ TTYC_KF56, TTYCODE_STRING, "kf56" },
  	{ TTYC_KF57, TTYCODE_STRING, "kf57" },
  	{ TTYC_KF58, TTYCODE_STRING, "kf58" },
  	{ TTYC_KF59, TTYCODE_STRING, "kf59" },
  	{ TTYC_KF6, TTYCODE_STRING, "kf6" },
  	{ TTYC_KF60, TTYCODE_STRING, "kf60" },
  	{ TTYC_KF61, TTYCODE_STRING, "kf61" },
  	{ TTYC_KF62, TTYCODE_STRING, "kf62" },
  	{ TTYC_KF63, TTYCODE_STRING, "kf63" },
  	{ TTYC_KF7, TTYCODE_STRING, "kf7" },
  	{ TTYC_KF8, TTYCODE_STRING, "kf8" },
  	{ TTYC_KF9, TTYCODE_STRING, "kf9" },
  	{ TTYC_KHOM2, TTYCODE_STRING, "kHOM" },
  	{ TTYC_KHOM3, TTYCODE_STRING, "kHOM3" },
  	{ TTYC_KHOM4, TTYCODE_STRING, "kHOM4" },
  	{ TTYC_KHOM5, TTYCODE_STRING, "kHOM5" },
  	{ TTYC_KHOM6, TTYCODE_STRING, "kHOM6" },
  	{ TTYC_KHOM7, TTYCODE_STRING, "kHOM7" },
  	{ TTYC_KHOME, TTYCODE_STRING, "khome" },
  	{ TTYC_KIC2, TTYCODE_STRING, "kIC" },
  	{ TTYC_KIC3, TTYCODE_STRING, "kIC3" },
  	{ TTYC_KIC4, TTYCODE_STRING, "kIC4" },
  	{ TTYC_KIC5, TTYCODE_STRING, "kIC5" },
  	{ TTYC_KIC6, TTYCODE_STRING, "kIC6" },
  	{ TTYC_KIC7, TTYCODE_STRING, "kIC7" },
  	{ TTYC_KICH1, TTYCODE_STRING, "kich1" },
  	{ TTYC_KLFT2, TTYCODE_STRING, "kLFT" },
  	{ TTYC_KLFT3, TTYCODE_STRING, "kLFT3" },
  	{ TTYC_KLFT4, TTYCODE_STRING, "kLFT4" },
  	{ TTYC_KLFT5, TTYCODE_STRING, "kLFT5" },
  	{ TTYC_KLFT6, TTYCODE_STRING, "kLFT6" },
  	{ TTYC_KLFT7, TTYCODE_STRING, "kLFT7" },
  	{ TTYC_KMOUS, TTYCODE_STRING, "kmous" },
  	{ TTYC_KNP, TTYCODE_STRING, "knp" },
  	{ TTYC_KNXT2, TTYCODE_STRING, "kNXT" },
  	{ TTYC_KNXT3, TTYCODE_STRING, "kNXT3" },
  	{ TTYC_KNXT4, TTYCODE_STRING, "kNXT4" },
  	{ TTYC_KNXT5, TTYCODE_STRING, "kNXT5" },
  	{ TTYC_KNXT6, TTYCODE_STRING, "kNXT6" },
  	{ TTYC_KNXT7, TTYCODE_STRING, "kNXT7" },
  	{ TTYC_KPP, TTYCODE_STRING, "kpp" },
  	{ TTYC_KPRV2, TTYCODE_STRING, "kPRV" },
  	{ TTYC_KPRV3, TTYCODE_STRING, "kPRV3" },
  	{ TTYC_KPRV4, TTYCODE_STRING, "kPRV4" },
  	{ TTYC_KPRV5, TTYCODE_STRING, "kPRV5" },
  	{ TTYC_KPRV6, TTYCODE_STRING, "kPRV6" },
  	{ TTYC_KPRV7, TTYCODE_STRING, "kPRV7" },
  	{ TTYC_KRIT2, TTYCODE_STRING, "kRIT" },
  	{ TTYC_KRIT3, TTYCODE_STRING, "kRIT3" },
  	{ TTYC_KRIT4, TTYCODE_STRING, "kRIT4" },
  	{ TTYC_KRIT5, TTYCODE_STRING, "kRIT5" },
  	{ TTYC_KRIT6, TTYCODE_STRING, "kRIT6" },
  	{ TTYC_KRIT7, TTYCODE_STRING, "kRIT7" },
  	{ TTYC_KUP2, TTYCODE_STRING, "kUP" },
  	{ TTYC_KUP3, TTYCODE_STRING, "kUP3" },
  	{ TTYC_KUP4, TTYCODE_STRING, "kUP4" },
  	{ TTYC_KUP5, TTYCODE_STRING, "kUP5" },
  	{ TTYC_KUP6, TTYCODE_STRING, "kUP6" },
  	{ TTYC_KUP7, TTYCODE_STRING, "kUP7" },
  	{ TTYC_MS, TTYCODE_STRING, "Ms" },
  	{ TTYC_OP, TTYCODE_STRING, "op" },
  	{ TTYC_REV, TTYCODE_STRING, "rev" },
  	{ TTYC_RI, TTYCODE_STRING, "ri" },
  	{ TTYC_RMACS, TTYCODE_STRING, "rmacs" },
  	{ TTYC_RMCUP, TTYCODE_STRING, "rmcup" },
  	{ TTYC_RMKX, TTYCODE_STRING, "rmkx" },
  	{ TTYC_SE, TTYCODE_STRING, "Se" },
  	{ TTYC_SETAB, TTYCODE_STRING, "setab" },
  	{ TTYC_SETAF, TTYCODE_STRING, "setaf" },
  	{ TTYC_SGR0, TTYCODE_STRING, "sgr0" },
  	{ TTYC_SITM, TTYCODE_STRING, "sitm" },
  	{ TTYC_SMACS, TTYCODE_STRING, "smacs" },
  	{ TTYC_SMCUP, TTYCODE_STRING, "smcup" },
  	{ TTYC_SMKX, TTYCODE_STRING, "smkx" },
  	{ TTYC_SMSO, TTYCODE_STRING, "smso" },
  	{ TTYC_SMUL, TTYCODE_STRING, "smul" },
  	{ TTYC_SS, TTYCODE_STRING, "Ss" },
  	{ TTYC_TSL, TTYCODE_STRING, "tsl" },
  	{ TTYC_VPA, TTYCODE_STRING, "vpa" },
  	{ TTYC_XENL, TTYCODE_FLAG, "xenl" },
  	{ TTYC_XT, TTYCODE_FLAG, "XT" },
  };
  
  char *
  tty_term_strip(const char *s)
  {
  	const char     *ptr;
  	static char	buf[BUFSIZ];
  	size_t		len;
  
  	/* Ignore strings with no padding. */
  	if (strchr(s, '$') == NULL)
  		return (xstrdup(s));
  
  	len = 0;
  	for (ptr = s; *ptr != '\0'; ptr++) {
  		if (*ptr == '$' && *(ptr + 1) == '<') {
  			while (*ptr != '\0' && *ptr != '>')
  				ptr++;
  			if (*ptr == '>')
  				ptr++;
  		}
  
  		buf[len++] = *ptr;
  		if (len == (sizeof buf) - 1)
  			break;
  	}
  	buf[len] = '\0';
  
  	return (xstrdup(buf));
  }
  
  void
  tty_term_override(struct tty_term *term, const char *overrides)
  {
  	const struct tty_term_code_entry	*ent;
  	struct tty_code				*code;
  	char					*termnext, *termstr;
  	char					*entnext, *entstr;
  	char					*s, *ptr, *val;
  	const char				*errstr;
  	u_int					 i;
  	int					 n, removeflag;
  
  	s = xstrdup(overrides);
  
  	termnext = s;
  	while ((termstr = strsep(&termnext, ",")) != NULL) {
  		entnext = termstr;
  
  		entstr = strsep(&entnext, ":");
  		if (entstr == NULL || entnext == NULL)
  			continue;
  		if (fnmatch(entstr, term->name, 0) != 0)
  			continue;
  		while ((entstr = strsep(&entnext, ":")) != NULL) {
  			if (*entstr == '\0')
  				continue;
  
  			val = NULL;
  			removeflag = 0;
  			if ((ptr = strchr(entstr, '=')) != NULL) {
  				*ptr++ = '\0';
  				val = xstrdup(ptr);
  				if (strunvis(val, ptr) == -1) {
  					free(val);
  					val = xstrdup(ptr);
  				}
  			} else if (entstr[strlen(entstr) - 1] == '@') {
  				entstr[strlen(entstr) - 1] = '\0';
  				removeflag = 1;
  			} else
  				val = xstrdup("");
  
  			log_debug("%s override: %s %s",
  			    term->name, entstr, removeflag ? "@" : val);
  			for (i = 0; i < NTTYCODE; i++) {
  				ent = &tty_term_codes[i];
  				if (strcmp(entstr, ent->name) != 0)
  					continue;
  				code = &term->codes[ent->code];
  
  				if (removeflag) {
  					code->type = TTYCODE_NONE;
  					continue;
  				}
  				switch (ent->type) {
  				case TTYCODE_NONE:
  					break;
  				case TTYCODE_STRING:
  					if (code->type == TTYCODE_STRING)
  						free(code->value.string);
  					code->value.string = xstrdup(val);
  					code->type = ent->type;
  					break;
  				case TTYCODE_NUMBER:
  					n = strtonum(val, 0, INT_MAX, &errstr);
  					if (errstr != NULL)
  						break;
  					code->value.number = n;
  					code->type = ent->type;
  					break;
  				case TTYCODE_FLAG:
  					code->value.flag = 1;
  					code->type = ent->type;
  					break;
  				}
  			}
  
  			free(val);
  		}
  	}
  
  	free(s);
  }
  
  struct tty_term *
  tty_term_find(char *name, int fd, char **cause)
  {
  	struct tty_term				*term;
  	const struct tty_term_code_entry	*ent;
  	struct tty_code				*code;
  	u_int					 i;
  	int		 			 n, error;
  	char					*s;
  	const char				*acs;
  
  	LIST_FOREACH(term, &tty_terms, entry) {
  		if (strcmp(term->name, name) == 0) {
  			term->references++;
  			return (term);
  		}
  	}
  
  	log_debug("new term: %s", name);
  	term = xmalloc(sizeof *term);
  	term->name = xstrdup(name);
  	term->references = 1;
  	term->flags = 0;
  	memset(term->codes, 0, sizeof term->codes);
  	LIST_INSERT_HEAD(&tty_terms, term, entry);
  
  	/* Set up curses terminal. */
  	if (setupterm(name, fd, &error) != OK) {
  		switch (error) {
  		case 1:
  			xasprintf(
  			    cause, "can't use hardcopy terminal: %s", name);
  			break;
  		case 0:
  			xasprintf(
  			    cause, "missing or unsuitable terminal: %s", name);
  			break;
  		case -1:
  			xasprintf(cause, "can't find terminfo database");
  			break;
  		default:
  			xasprintf(cause, "unknown error");
  			break;
  		}
  		goto error;
  	}
  
  	/* Fill in codes. */
  	for (i = 0; i < NTTYCODE; i++) {
  		ent = &tty_term_codes[i];
  
  		code = &term->codes[ent->code];
  		code->type = TTYCODE_NONE;
  		switch (ent->type) {
  		case TTYCODE_NONE:
  			break;
  		case TTYCODE_STRING:
  			s = tigetstr((char *) ent->name);
  			if (s == NULL || s == (char *) -1)
  				break;
  			code->type = TTYCODE_STRING;
  			code->value.string = tty_term_strip(s);
  			break;
  		case TTYCODE_NUMBER:
  			n = tigetnum((char *) ent->name);
  			if (n == -1 || n == -2)
  				break;
  			code->type = TTYCODE_NUMBER;
  			code->value.number = n;
  			break;
  		case TTYCODE_FLAG:
  			n = tigetflag((char *) ent->name);
  			if (n == -1)
  				break;
  			code->type = TTYCODE_FLAG;
  			code->value.number = n;
  			break;
  		}
  	}
  
  	/* Apply terminal overrides. */
  	s = options_get_string(&global_options, "terminal-overrides");
  	tty_term_override(term, s);
  
  	/* Delete curses data. */
  #if !defined(NCURSES_VERSION_MAJOR) || NCURSES_VERSION_MAJOR > 5 || \
      (NCURSES_VERSION_MAJOR == 5 && NCURSES_VERSION_MINOR > 6)
  	del_curterm(cur_term);
  #endif
  
  	/* These are always required. */
  	if (!tty_term_has(term, TTYC_CLEAR)) {
  		xasprintf(cause, "terminal does not support clear");
  		goto error;
  	}
  	if (!tty_term_has(term, TTYC_CUP)) {
  		xasprintf(cause, "terminal does not support cup");
  		goto error;
  	}
  
  	/* These can be emulated so one of the two is required. */
  	if (!tty_term_has(term, TTYC_CUD1) && !tty_term_has(term, TTYC_CUD)) {
  		xasprintf(cause, "terminal does not support cud1 or cud");
  		goto error;
  	}
  
  	/* Figure out if we have 256. */
  	if (tty_term_number(term, TTYC_COLORS) == 256)
  		term->flags |= TERM_256COLOURS;
  
  	/*
  	 * Terminals without xenl (eat newline glitch) wrap at at $COLUMNS - 1
  	 * rather than $COLUMNS (the cursor can never be beyond $COLUMNS - 1).
  	 *
  	 * This is irritating, most notably because it is impossible to write
  	 * to the very bottom-right of the screen without scrolling.
  	 *
  	 * Flag the terminal here and apply some workarounds in other places to
  	 * do the best possible.
  	 */
  	if (!tty_term_flag(term, TTYC_XENL))
  		term->flags |= TERM_EARLYWRAP;
  
  	/* Generate ACS table. If none is present, use nearest ASCII. */
  	memset(term->acs, 0, sizeof term->acs);
  	if (tty_term_has(term, TTYC_ACSC))
  		acs = tty_term_string(term, TTYC_ACSC);
  	else
  		acs = "a#j+k+l+m+n+o-p-q-r-s-t+u+v+w+x|y<z>~.";
  	for (; acs[0] != '\0' && acs[1] != '\0'; acs += 2)
  		term->acs[(u_char) acs[0]][0] = acs[1];
  
  	/* On terminals with xterm titles (XT), fill in tsl and fsl. */
  	if (tty_term_flag(term, TTYC_XT) &&
  	    !tty_term_has(term, TTYC_TSL) &&
  	    !tty_term_has(term, TTYC_FSL)) {
  		code = &term->codes[TTYC_TSL];
  		code->value.string = xstrdup("\033]0;");
  		code->type = TTYCODE_STRING;
  		code = &term->codes[TTYC_FSL];
  		code->value.string = xstrdup("\007");
  		code->type = TTYCODE_STRING;
  	}
  
  	return (term);
  
  error:
  	tty_term_free(term);
  	return (NULL);
  }
  
  void
  tty_term_free(struct tty_term *term)
  {
  	u_int	i;
  
  	if (--term->references != 0)
  		return;
  
  	LIST_REMOVE(term, entry);
  
  	for (i = 0; i < NTTYCODE; i++) {
  		if (term->codes[i].type == TTYCODE_STRING)
  			free(term->codes[i].value.string);
  	}
  	free(term->name);
  	free(term);
  }
  
  int
  tty_term_has(struct tty_term *term, enum tty_code_code code)
  {
  	return (term->codes[code].type != TTYCODE_NONE);
  }
  
  const char *
  tty_term_string(struct tty_term *term, enum tty_code_code code)
  {
  	if (!tty_term_has(term, code))
  		return ("");
  	if (term->codes[code].type != TTYCODE_STRING)
  		log_fatalx("not a string: %d", code);
  	return (term->codes[code].value.string);
  }
  
  /* No vtparm. Fucking curses. */
  const char *
  tty_term_string1(struct tty_term *term, enum tty_code_code code, int a)
  {
  	return (tparm((char *) tty_term_string(term, code), a, 0, 0, 0, 0, 0, 0, 0, 0));
  }
  
  const char *
  tty_term_string2(struct tty_term *term, enum tty_code_code code, int a, int b)
  {
  	return (tparm((char *) tty_term_string(term, code), a, b, 0, 0, 0, 0, 0, 0, 0));
  }
  
  const char *
  tty_term_ptr1(struct tty_term *term, enum tty_code_code code, const void *a)
  {
  	return (tparm((char *) tty_term_string(term, code), a, 0, 0, 0, 0, 0, 0, 0, 0));
  }
  
  const char *
  tty_term_ptr2(struct tty_term *term, enum tty_code_code code, const void *a,
      const void *b)
  {
  	return (tparm((char *) tty_term_string(term, code), a, b, 0, 0, 0, 0, 0, 0, 0));
  }
  
  int
  tty_term_number(struct tty_term *term, enum tty_code_code code)
  {
  	if (!tty_term_has(term, code))
  		return (0);
  	if (term->codes[code].type != TTYCODE_NUMBER)
  		log_fatalx("not a number: %d", code);
  	return (term->codes[code].value.number);
  }
  
  int
  tty_term_flag(struct tty_term *term, enum tty_code_code code)
  {
  	if (!tty_term_has(term, code))
  		return (0);
  	if (term->codes[code].type != TTYCODE_FLAG)
  		log_fatalx("not a flag: %d", code);
  	return (term->codes[code].value.flag);
  }
  