556 lines
11 KiB
C
556 lines
11 KiB
C
/*-
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* Copyright (c) 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)options_f.c 8.28 (Berkeley) 3/18/94";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <bitstring.h>
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include "compat.h"
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#include <db.h>
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#include <regex.h>
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#include "vi.h"
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#include "tag.h"
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static int opt_dup __P((SCR *, int, char *));
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static int opt_putenv __P((char *));
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#define DECL(f) \
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int \
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f(sp, op, str, val) \
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SCR *sp; \
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OPTION *op; \
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char *str; \
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u_long val;
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#define CALL(f) \
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f(sp, op, str, val)
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#define turnoff val
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DECL(f_altwerase)
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{
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if (turnoff)
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O_CLR(sp, O_ALTWERASE);
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else {
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O_SET(sp, O_ALTWERASE);
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O_CLR(sp, O_TTYWERASE);
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}
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return (0);
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}
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DECL(f_cdpath)
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{
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return (opt_dup(sp, O_CDPATH, str));
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}
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DECL(f_columns)
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{
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char buf[25];
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/* Validate the number. */
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if (val < MINIMUM_SCREEN_COLS) {
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msgq(sp, M_ERR, "Screen columns too small, less than %d.",
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MINIMUM_SCREEN_COLS);
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return (1);
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}
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if (val < O_VAL(sp, O_SHIFTWIDTH)) {
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msgq(sp, M_ERR,
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"Screen columns too small, less than shiftwidth.");
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return (1);
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}
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if (val < O_VAL(sp, O_SIDESCROLL)) {
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msgq(sp, M_ERR,
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"Screen columns too small, less than sidescroll.");
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return (1);
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}
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if (val < O_VAL(sp, O_TABSTOP)) {
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msgq(sp, M_ERR,
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"Screen columns too small, less than tabstop.");
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return (1);
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}
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if (val < O_VAL(sp, O_WRAPMARGIN)) {
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msgq(sp, M_ERR,
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"Screen columns too small, less than wrapmargin.");
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return (1);
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}
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#ifdef XXX_NOT_RIGHT
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/*
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* This has to be checked by reaching down into the screen code.
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*/
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if (val < O_NUMBER_LENGTH) {
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msgq(sp, M_ERR,
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"Screen columns too small, less than number option.");
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return (1);
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}
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#endif
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/* Set the columns value in the environment for curses. */
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(void)snprintf(buf, sizeof(buf), "COLUMNS=%lu", val);
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if (opt_putenv(buf))
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return (1);
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/* This is expensive, don't do it unless it's necessary. */
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if (O_VAL(sp, O_COLUMNS) == val)
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return (0);
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/* Set the value. */
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O_VAL(sp, O_COLUMNS) = val;
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F_SET(sp, S_RESIZE);
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return (0);
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}
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DECL(f_keytime)
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{
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O_VAL(sp, O_KEYTIME) = val;
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return (0);
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}
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DECL(f_leftright)
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{
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if (turnoff)
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O_CLR(sp, O_LEFTRIGHT);
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else
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O_SET(sp, O_LEFTRIGHT);
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F_SET(sp, S_REFORMAT | S_REDRAW);
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return (0);
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}
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DECL(f_lines)
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{
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char buf[25];
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/* Validate the number. */
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if (val < MINIMUM_SCREEN_ROWS) {
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msgq(sp, M_ERR, "Screen lines too small, less than %d.",
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MINIMUM_SCREEN_ROWS);
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return (1);
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}
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/* Set the rows value in the environment for curses. */
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(void)snprintf(buf, sizeof(buf), "ROWS=%lu", val);
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if (opt_putenv(buf))
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return (1);
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/* This is expensive, don't do it unless it's necessary. */
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if (O_VAL(sp, O_LINES) == val)
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return (0);
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/* Set the value. */
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O_VAL(sp, O_LINES) = val;
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/*
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* If no window value set, set a new default window and,
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* optionally, a new scroll value.
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*/
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if (!F_ISSET(&sp->opts[O_WINDOW], OPT_SET)) {
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O_VAL(sp, O_WINDOW) = val - 1;
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if (!F_ISSET(&sp->opts[O_SCROLL], OPT_SET))
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O_VAL(sp, O_SCROLL) = val / 2;
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}
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F_SET(sp, S_RESIZE);
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return (0);
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}
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DECL(f_lisp)
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{
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msgq(sp, M_ERR, "The lisp option is not implemented.");
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return (0);
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}
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DECL(f_list)
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{
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if (turnoff)
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O_CLR(sp, O_LIST);
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else
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O_SET(sp, O_LIST);
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F_SET(sp, S_REFORMAT | S_REDRAW);
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return (0);
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}
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DECL(f_matchtime)
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{
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O_VAL(sp, O_MATCHTIME) = val;
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return (0);
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}
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DECL(f_mesg)
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{
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struct stat sb;
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char *tty;
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/* Find the tty. */
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if ((tty = ttyname(STDERR_FILENO)) == NULL) {
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msgq(sp, M_ERR, "ttyname: %s.", strerror(errno));
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return (1);
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}
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/* Save the tty mode for later; only save it once. */
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if (!F_ISSET(sp->gp, G_SETMODE)) {
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F_SET(sp->gp, G_SETMODE);
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if (stat(tty, &sb) < 0) {
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msgq(sp, M_ERR, "%s: %s.", tty, strerror(errno));
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return (1);
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}
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sp->gp->origmode = sb.st_mode;
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}
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if (turnoff) {
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if (chmod(tty, sp->gp->origmode & ~S_IWGRP) < 0) {
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msgq(sp, M_ERR, "messages not turned off: %s: %s.",
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tty, strerror(errno));
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return (1);
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}
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O_CLR(sp, O_MESG);
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} else {
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if (chmod(tty, sp->gp->origmode | S_IWGRP) < 0) {
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msgq(sp, M_ERR, "messages not turned on: %s: %s.",
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tty, strerror(errno));
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return (1);
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}
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O_SET(sp, O_MESG);
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}
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return (0);
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}
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/*
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* f_modeline --
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* This has been documented in historical systems as both "modeline"
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* and as "modelines". Regardless of the name, this option represents
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* a security problem of mammoth proportions, not to mention a stunning
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* example of what your intro CS professor referred to as the perils of
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* mixing code and data. Don't add it, or I will kill you.
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*/
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DECL(f_modeline)
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{
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if (!turnoff)
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msgq(sp, M_ERR, "The modeline(s) option may never be set.");
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return (0);
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}
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DECL(f_number)
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{
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if (turnoff)
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O_CLR(sp, O_NUMBER);
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else
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O_SET(sp, O_NUMBER);
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F_SET(sp, S_REFORMAT | S_REDRAW);
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return (0);
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}
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DECL(f_paragraph)
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{
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if (strlen(str) & 1) {
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msgq(sp, M_ERR,
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"Paragraph options must be in sets of two characters.");
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return (1);
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}
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return (opt_dup(sp, O_PARAGRAPHS, str));
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}
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DECL(f_readonly)
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{
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if (turnoff) {
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O_CLR(sp, O_READONLY);
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if (sp->frp != NULL)
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F_CLR(sp->frp, FR_RDONLY);
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} else {
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O_SET(sp, O_READONLY);
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if (sp->frp != NULL)
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F_SET(sp->frp, FR_RDONLY);
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}
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return (0);
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}
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DECL(f_ruler)
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{
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if (turnoff)
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O_CLR(sp, O_RULER);
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else
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O_SET(sp, O_RULER);
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return (0);
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}
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DECL(f_section)
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{
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if (strlen(str) & 1) {
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msgq(sp, M_ERR,
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"Section options must be in sets of two characters.");
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return (1);
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}
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return (opt_dup(sp, O_SECTIONS, str));
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}
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DECL(f_shiftwidth)
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{
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if (val == 0) {
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msgq(sp, M_ERR, "The shiftwidth can't be set to 0.");
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return (1);
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}
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if (val > O_VAL(sp, O_COLUMNS)) {
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msgq(sp, M_ERR,
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"Shiftwidth can't be larger than screen size.");
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return (1);
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}
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O_VAL(sp, O_SHIFTWIDTH) = val;
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return (0);
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}
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DECL(f_sidescroll)
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{
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if (val > O_VAL(sp, O_COLUMNS)) {
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msgq(sp, M_ERR,
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"Sidescroll can't be larger than screen size.");
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return (1);
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}
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O_VAL(sp, O_SIDESCROLL) = val;
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return (0);
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}
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/*
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* f_sourceany --
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* Historic vi, on startup, source'd $HOME/.exrc and ./.exrc, if they
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* were owned by the user. The sourceany option was an undocumented
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* feature of historic vi which permitted the startup source'ing of
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* .exrc files the user didn't own. This is an obvious security problem,
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* and we ignore the option.
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*/
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DECL(f_sourceany)
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{
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if (!turnoff)
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msgq(sp, M_ERR, "The sourceany option may never be set.");
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return (0);
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}
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DECL(f_tabstop)
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{
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if (val == 0) {
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msgq(sp, M_ERR, "Tab stops can't be set to 0.");
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return (1);
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}
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#define MAXTABSTOP 20
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if (val > MAXTABSTOP) {
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msgq(sp, M_ERR,
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"Tab stops can't be larger than %d.", MAXTABSTOP);
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return (1);
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}
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if (val > O_VAL(sp, O_COLUMNS)) {
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msgq(sp, M_ERR,
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"Tab stops can't be larger than screen size.",
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MAXTABSTOP);
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return (1);
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}
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O_VAL(sp, O_TABSTOP) = val;
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F_SET(sp, S_REFORMAT | S_REDRAW);
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return (0);
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}
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DECL(f_tags)
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{
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return (opt_dup(sp, O_TAGS, str));
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}
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DECL(f_term)
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{
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char buf[256];
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if (opt_dup(sp, O_TERM, str))
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return (1);
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/* Set the terminal value in the environment for curses. */
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(void)snprintf(buf, sizeof(buf), "TERM=%s", str);
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if (opt_putenv(buf))
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return (1);
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if (set_window_size(sp, 0, 0))
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return (1);
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return (0);
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}
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DECL(f_ttywerase)
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{
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if (turnoff)
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O_CLR(sp, O_TTYWERASE);
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else {
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O_SET(sp, O_TTYWERASE);
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O_CLR(sp, O_ALTWERASE);
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}
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return (0);
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}
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DECL(f_w300)
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{
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/* Historical behavior for w300 was < 1200. */
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if (baud_from_bval(sp) >= 1200)
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return (0);
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if (CALL(f_window))
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return (1);
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if (val > O_VAL(sp, O_LINES) - 1)
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val = O_VAL(sp, O_LINES) - 1;
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O_VAL(sp, O_W300) = val;
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return (0);
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}
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DECL(f_w1200)
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{
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u_long v;
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/* Historical behavior for w1200 was == 1200. */
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v = baud_from_bval(sp);
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if (v < 1200 || v > 4800)
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return (0);
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if (CALL(f_window))
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return (1);
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if (val > O_VAL(sp, O_LINES) - 1)
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val = O_VAL(sp, O_LINES) - 1;
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O_VAL(sp, O_W1200) = val;
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return (0);
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}
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DECL(f_w9600)
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{
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speed_t v;
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/* Historical behavior for w9600 was > 1200. */
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v = baud_from_bval(sp);
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if (v <= 4800)
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return (0);
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if (CALL(f_window))
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return (1);
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if (val > O_VAL(sp, O_LINES) - 1)
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val = O_VAL(sp, O_LINES) - 1;
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O_VAL(sp, O_W9600) = val;
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return (0);
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}
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DECL(f_window)
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{
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if (val < MINIMUM_SCREEN_ROWS) {
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msgq(sp, M_ERR, "Window too small, less than %d.",
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MINIMUM_SCREEN_ROWS);
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return (1);
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}
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if (val > O_VAL(sp, O_LINES) - 1)
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val = O_VAL(sp, O_LINES) - 1;
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O_VAL(sp, O_WINDOW) = val;
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O_VAL(sp, O_SCROLL) = val / 2;
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return (0);
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}
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DECL(f_wrapmargin)
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{
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if (val > O_VAL(sp, O_COLUMNS)) {
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msgq(sp, M_ERR,
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"Wrapmargin value can't be larger than screen size.");
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return (1);
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}
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O_VAL(sp, O_WRAPMARGIN) = val;
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return (0);
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}
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/*
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* opt_dup --
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* Copy a string value for user display.
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*/
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static int
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opt_dup(sp, opt, str)
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SCR *sp;
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int opt;
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char *str;
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{
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char *p;
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/* Copy for user display. */
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if ((p = strdup(str)) == NULL) {
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msgq(sp, M_SYSERR, NULL);
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return (1);
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}
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/* Free the old contents. */
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if (F_ISSET(&sp->opts[opt], OPT_ALLOCATED))
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free(O_STR(sp, opt));
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/* Note that it's set and allocated. */
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F_SET(&sp->opts[opt], OPT_ALLOCATED | OPT_SET);
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/* Assign new contents. */
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O_STR(sp, opt) = p;
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return (0);
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}
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/*
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* opt_putenv --
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* Put a value into the environment. We use putenv(3) because it's
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* more portable. The following hack is because some moron decided
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* to keep a reference to the memory passed to putenv(3), instead of
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* having it allocate its own. Someone clearly needs to get promoted
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* into management.
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*/
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static int
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opt_putenv(s)
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char *s;
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{
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char *t;
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/* Memory leak. */
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if ((t = strdup(s)) == NULL)
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return (1);
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return (putenv(t));
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}
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