Generally use NULL instead of explicitly casting 0 to some pointer type (part2).
[dragonfly.git] / games / hack / hack.ioctl.c
... / ...
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1/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
2/* hack.ioctl.c - version 1.0.2 */
3/* $FreeBSD: src/games/hack/hack.ioctl.c,v 1.2 1999/09/12 07:01:23 marcel Exp $
4 $DragonFly: src/games/hack/hack.ioctl.c,v 1.4 2006/08/21 19:45:32 pavalos Exp $
5
6 This cannot be part of hack.tty.c (as it was earlier) since on some
7 systems (e.g. MUNIX) the include files <termio.h> and <sgtty.h>
8 define the same constants, and the C preprocessor complains. */
9#include "hack.h"
10#ifdef BSD
11#include <sgtty.h>
12struct ltchars ltchars, ltchars0;
13#else
14#include <termio.h> /* also includes part of <sgtty.h> */
15struct termio termio;
16#endif /* BSD */
17
18void
19getioctls(void)
20{
21#ifdef BSD
22 ioctl(fileno(stdin), (int) TIOCGLTC, (char *) &ltchars);
23 ioctl(fileno(stdin), (int) TIOCSLTC, (char *) &ltchars0);
24#else
25 ioctl(fileno(stdin), (int) TCGETA, &termio);
26#endif /* BSD */
27}
28
29void
30setioctls(void)
31{
32#ifdef BSD
33 ioctl(fileno(stdin), (int) TIOCSLTC, (char *) &ltchars);
34#else
35 ioctl(fileno(stdin), (int) TCSETA, &termio);
36#endif /* BSD */
37}
38
39#ifdef SUSPEND /* implies BSD */
40#include <signal.h>
41int
42dosuspend(void)
43{
44#ifdef SIGTSTP
45 if(signal(SIGTSTP, SIG_IGN) == SIG_DFL) {
46 settty(NULL);
47 signal(SIGTSTP, SIG_DFL);
48 kill(0, SIGTSTP);
49 gettty();
50 setftty();
51 docrt();
52 } else {
53 pline("I don't think your shell has job control.");
54 }
55#else /* SIGTSTP */
56 pline("Sorry, it seems we have no SIGTSTP here. Try ! or S.");
57#endif /* SIGTSTP */
58 return(0);
59}
60#endif /* SUSPEND */