mirror of
https://github.com/freebsd/freebsd-src
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![Warner Losh](/assets/img/avatar_default.png)
Remove ancient SCCS tags from the tree, automated scripting, with two minor fixup to keep things compiling. All the common forms in the tree were removed with a perl script. Sponsored by: Netflix
177 lines
4.1 KiB
C
177 lines
4.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1980, 1992, 1993
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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. 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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#include <sys/select.h>
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#include <sys/time.h>
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#include <errno.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <unistd.h>
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#include "systat.h"
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#include "extern.h"
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static char line[80];
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static int keyboard_dispatch(int ch);
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int
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keyboard(void)
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{
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int ch, n;
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struct timeval last, intvl, now, tm;
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fd_set rfds;
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/* Set initial timings */
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gettimeofday(&last, NULL);
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intvl.tv_sec = delay / 1000000;
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intvl.tv_usec = delay % 1000000;
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for (;;) {
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col = 0;
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move(CMDLINE, 0);
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for (;;) {
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/* Determine interval to sleep */
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(void)gettimeofday(&now, NULL);
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tm.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
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tm.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
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while (tm.tv_usec < 0) {
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tm.tv_usec += 1000000;
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tm.tv_sec--;
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}
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while (tm.tv_usec >= 1000000) {
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tm.tv_usec -= 1000000;
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tm.tv_sec++;
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}
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if (tm.tv_sec < 0) {
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/* We have to update screen immediately */
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display();
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gettimeofday(&last, NULL);
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continue;
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}
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/* Prepare select */
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FD_ZERO(&rfds);
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FD_SET(STDIN_FILENO, &rfds);
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n = select(STDIN_FILENO + 1, &rfds, NULL, NULL, &tm);
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if (n > 0) {
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/* Read event on stdin */
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ch = getch();
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if (keyboard_dispatch(ch) == 0) {
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refresh();
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continue;
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}
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line[col] = '\0';
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command(line + 1);
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/* Refresh delay */
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intvl.tv_sec = delay / 1000000;
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intvl.tv_usec = delay % 1000000;
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refresh();
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break;
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}
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if (n < 0 && errno != EINTR)
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exit(1);
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/* Timeout or signal. Call display another time */
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display();
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gettimeofday(&last, NULL);
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}
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}
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}
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static int
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keyboard_dispatch(int ch)
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{
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if (ch == ERR) {
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if (errno == EINTR)
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return 0;
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exit(1);
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}
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if (ch >= 'A' && ch <= 'Z')
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ch += 'a' - 'A';
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if (col == 0) {
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if (ch == CTRL('l')) {
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wrefresh(curscr);
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return 0;
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}
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if (ch == CTRL('g')) {
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status();
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return 0;
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}
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if (ch != ':')
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return 0;
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move(CMDLINE, 0);
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clrtoeol();
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}
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if (ch == erasechar() && col > 0) {
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if (col == 1 && line[0] == ':')
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return 0;
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col--;
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goto doerase;
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}
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if (ch == CTRL('w') && col > 0) {
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while (--col >= 0 && isspace(line[col]))
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;
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col++;
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while (--col >= 0 && !isspace(line[col]))
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if (col == 0 && line[0] == ':')
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return 1;
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col++;
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goto doerase;
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}
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if (ch == killchar() && col > 0) {
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col = 0;
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if (line[0] == ':')
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col++;
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doerase:
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move(CMDLINE, col);
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clrtoeol();
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return 0;
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}
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if (isprint(ch) || ch == ' ') {
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line[col] = ch;
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mvaddch(CMDLINE, col, ch);
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col++;
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}
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if (col == 0 || (ch != '\r' && ch != '\n'))
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return 0;
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return 1;
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}
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