20d6e5fe6e
of user keys (documentation pending). The only key whose semantics have changed is the capital 'N' key, which now performs a repeat-search in the opposite direction (just like in vi). This commit is a little bulkier than what I had originally planned. I'm not completely happy with the direction it went, but it's definately an improvement, and the alternative is to continue becoming irrelevant compared to GNU less. (Does anyone even _use_ /usr/bin/more these days?)
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/*
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* Copyright (c) 1988 Mark Nudleman
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* Copyright (c) 1988, 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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#ifndef lint
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static char sccsid[] = "@(#)ttyin.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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/*
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* Routines dealing with getting input from the keyboard (i.e. from the user).
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*/
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#include <less.h>
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static int tty;
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/*
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* Open keyboard for input.
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* (Just use file descriptor 2.)
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*/
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open_getchr()
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{
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tty = 2;
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}
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/*
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* Get a character from the keyboard.
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*/
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getchr()
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{
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char c;
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int result;
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do
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{
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result = iread(tty, &c, 1);
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if (result == READ_INTR)
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return (READ_INTR);
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if (result < 0)
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{
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/*
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* Don't call error() here,
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* because error calls getchr!
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*/
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quit();
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}
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} while (result != 1 || c == 0);
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return ((unsigned char)c);
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}
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