1 |
|
|
/* $OpenBSD: tty.c,v 1.3 2015/09/05 09:49:24 jsg Exp $ */ |
2 |
|
|
|
3 |
|
|
/* |
4 |
|
|
* Copyright (c) 2013, Otto Moerbeek <otto@drijf.net> |
5 |
|
|
* |
6 |
|
|
* Permission to use, copy, modify, and distribute this software for any |
7 |
|
|
* purpose with or without fee is hereby granted, provided that the above |
8 |
|
|
* copyright notice and this permission notice appear in all copies. |
9 |
|
|
* |
10 |
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
11 |
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
12 |
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
13 |
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
14 |
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
15 |
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
16 |
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
17 |
|
|
*/ |
18 |
|
|
|
19 |
|
|
#include <errno.h> |
20 |
|
|
#include <signal.h> |
21 |
|
|
#include <histedit.h> |
22 |
|
|
#include <termios.h> |
23 |
|
|
#include "extern.h" |
24 |
|
|
|
25 |
|
|
struct termios ttysaved, ttyedit; |
26 |
|
|
|
27 |
|
|
static int |
28 |
|
|
settty(struct termios *t) |
29 |
|
|
{ |
30 |
|
|
int ret; |
31 |
|
|
|
32 |
|
|
while ((ret = tcsetattr(0, TCSADRAIN, t)) == -1 && errno == EINTR) |
33 |
|
|
continue; |
34 |
|
|
return ret; |
35 |
|
|
} |
36 |
|
|
|
37 |
|
|
int |
38 |
|
|
gettty(struct termios *t) |
39 |
|
|
{ |
40 |
|
|
int ret; |
41 |
|
|
|
42 |
|
|
while ((ret = tcgetattr(0, t)) == -1 && errno == EINTR) |
43 |
|
|
continue; |
44 |
|
|
return ret; |
45 |
|
|
} |
46 |
|
|
|
47 |
|
|
/* ARGSUSED */ |
48 |
|
|
void |
49 |
|
|
tstpcont(int sig) |
50 |
|
|
{ |
51 |
|
|
int save_errno = errno; |
52 |
|
|
|
53 |
|
|
if (sig == SIGTSTP) { |
54 |
|
|
signal(SIGCONT, tstpcont); |
55 |
|
|
gettty(&ttyedit); |
56 |
|
|
settty(&ttysaved); |
57 |
|
|
} else { |
58 |
|
|
signal(SIGTSTP, tstpcont); |
59 |
|
|
settty(&ttyedit); |
60 |
|
|
} |
61 |
|
|
signal(sig, SIG_DFL); |
62 |
|
|
kill(0, sig); |
63 |
|
|
errno = save_errno; |
64 |
|
|
} |