1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/* $FreeBSD$ */
/* $OpenBSD: tty.c,v 1.2 2013/11/12 13:54:51 deraadt Exp $ */
/*
* Copyright (c) 2013, Otto Moerbeek <otto@drijf.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <errno.h>
#include <signal.h>
#include <histedit.h>
#include <termios.h>
#include "extern.h"
struct termios ttysaved, ttyedit;
static int
settty(struct termios *t)
{
int ret;
while ((ret = tcsetattr(0, TCSADRAIN, t) == -1) && errno == EINTR)
continue;
return ret;
}
int
gettty(struct termios *t)
{
int ret;
while ((ret = tcgetattr(0, t) == -1) && errno == EINTR)
continue;
return ret;
}
/* ARGSUSED */
void
tstpcont(int sig)
{
int save_errno = errno;
if (sig == SIGTSTP) {
signal(SIGCONT, tstpcont);
gettty(&ttyedit);
settty(&ttysaved);
} else {
signal(SIGTSTP, tstpcont);
settty(&ttyedit);
}
signal(sig, SIG_DFL);
kill(0, sig);
errno = save_errno;
}
|
