xref: /src/usr.bin/systat/keyboard.c

/*	$NetBSD: keyboard.c,v 1.5 1998/07/12 05:59:00 mrg Exp $	*/

/*-
 * Copyright (c) 1980, 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)keyboard.c	8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: keyboard.c,v 1.5 1998/07/12 05:59:00 mrg Exp $");
#endif /* not lint */

#include <sys/types.h>

#include <ctype.h>
#include <curses.h>
#include <signal.h>
#include <termios.h>
#include <stdlib.h>

#include "systat.h"
#include "extern.h"

int
keyboard()
{
	char ch, *line;
	int linesz;
	sigset_t set;

	sigemptyset(&set);
	sigaddset(&set, SIGALRM);

	linesz = COLS - 2;		/* XXX does not get updated on SIGWINCH */
	line = malloc(linesz);
	if (line == NULL) {
		error("malloc");
		exit(1);
	}

	for (;;) {
		col = 0;
		move(CMDLINE, 0);
		do {
			refresh();
			ch = getch() & 0177;
			if (ch == 0177 && ferror(stdin)) {
				clearerr(stdin);
				continue;
			}
			if (ch >= 'A' && ch <= 'Z')
				ch += 'a' - 'A';
			if (col == 0) {
				if (ch == CTRL('l')) {
					sigprocmask(SIG_BLOCK, &set, NULL);
					wrefresh(curscr);
					sigprocmask(SIG_UNBLOCK, &set, NULL);
					continue;
				}
				if (ch == CTRL('g')) {
					sigprocmask(SIG_BLOCK, &set, NULL);
					status();
					sigprocmask(SIG_UNBLOCK, &set, NULL);
					continue;
				}
				if (ch != ':')
					continue;
				move(CMDLINE, 0);
				clrtoeol();
			}
			if (ch == erasechar() && col > 0) {
				if (col == 1 && line[0] == ':')
					continue;
				col--;
				goto doerase;
			}
			if (ch == CTRL('w') && col > 0) {
				while (--col >= 0 && isspace(line[col]));
				col++;
				while (--col >= 0 && !isspace(line[col]))
					if (col == 0 && line[0] == ':')
						break;
				col++;
				goto doerase;
			}
			if (ch == killchar() && col > 0) {
				if (line[0] == ':')
					col = 1;
				else
					col = 0;
		doerase:
				move(CMDLINE, col);
				clrtoeol();
				continue;
			}
			if (isprint(ch) || ch == ' ') {
				if (col < linesz) {
					line[col] = ch;
					mvaddch(CMDLINE, col, ch);
					col++;
				}
			}
		} while (col == 0 || (ch != '\r' && ch != '\n'));
		line[col] = '\0';
		sigprocmask(SIG_BLOCK, &set, NULL);
		command(line + 1);
		sigprocmask(SIG_UNBLOCK, &set, NULL);
	}
	/* NOTREACHED */
}