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c2dbb0de27
- Exit if getch() returns with an error other than EINTR. Otherwise systat(1) may get stuck in an infinite loop if it doesn't receive SIGHUP when terminal closes. [1] - Remove attempt to clear stdio error indicators. getch() doesn't use stdio, making it useless. [2] - Remove unneeded masking of getch() return value. [2] PR: bin/107171 Reviewed by: bde Approved by: trasz (mentor) Obtained from: OpenBSD [1] Suggested by: bde [2] MFC after: 1 month
127 lines
4.8 KiB
C
127 lines
4.8 KiB
C
/*-
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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. 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifdef lint
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static const char sccsid[] = "@(#)keyboard.c 8.1 (Berkeley) 6/6/93";
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#endif
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#include <errno.h>
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#include <ctype.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <termios.h>
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#include "systat.h"
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#include "extern.h"
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int
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keyboard(void)
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{
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char ch, line[80];
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int oldmask;
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for (;;) {
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col = 0;
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move(CMDLINE, 0);
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do {
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refresh();
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ch = getch();
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if (ch == ERR) {
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if (errno == EINTR)
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continue;
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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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#define mask(s) (1 << ((s) - 1))
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if (ch == CTRL('l')) {
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oldmask = sigblock(mask(SIGALRM));
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wrefresh(curscr);
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sigsetmask(oldmask);
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continue;
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}
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if (ch == CTRL('g')) {
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oldmask = sigblock(mask(SIGALRM));
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status();
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sigsetmask(oldmask);
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continue;
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}
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if (ch != ':')
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continue;
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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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continue;
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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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break;
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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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continue;
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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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} while (col == 0 || (ch != '\r' && ch != '\n'));
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line[col] = '\0';
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oldmask = sigblock(mask(SIGALRM));
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command(line + 1);
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sigsetmask(oldmask);
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}
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/*NOTREACHED*/
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}
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