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/*
* Copyright (C) 1984-2012 Mark Nudelman
* Modified for use with illumos by Garrett D'Amore.
* Copyright 2014 Garrett D'Amore <garrett@damore.org>
*
* You may distribute under the terms of either the GNU General Public
* License or the Less License, as specified in the README file.
*
* For more information, see the README file.
*/
/*
* Routines dealing with getting input from the keyboard (i.e. from the user).
*/
#include "less.h"
int tty;
extern volatile sig_atomic_t sigs;
extern int utf_mode;
/*
* Open keyboard for input.
*/
void
open_getchr(void)
{
/*
* Try /dev/tty.
* If that doesn't work, use file descriptor 2,
* which in Unix is usually attached to the screen,
* but also usually lets you read from the keyboard.
*/
tty = open("/dev/tty", O_RDONLY);
if (tty < 0)
tty = STDERR_FILENO;
}
/*
* Get a character from the keyboard.
*/
int
getchr(void)
{
unsigned char c;
int result;
do {
result = iread(tty, &c, sizeof (char));
if (result == READ_INTR)
return (READ_INTR);
if (result < 0) {
/*
* Don't call error() here,
* because error calls getchr!
*/
quit(QUIT_ERROR);
}
/*
* Various parts of the program cannot handle
* an input character of '\0'.
* If a '\0' was actually typed, convert it to '\340' here.
*/
if (c == '\0')
c = 0340;
} while (result != 1);
return (c & 0xFF);
}
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