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