blob: 2fff3482c02880a912f556824d26ead0eea77046 (
plain)
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
|
/* $OpenBSD: tty.c,v 1.10 2014/08/10 02:44:26 guenther Exp $ */
#include "sh.h"
#include <sys/stat.h>
#define EXTERN
#include "tty.h"
#undef EXTERN
/* Initialize tty_fd. Used for saving/reseting tty modes upon
* foreground job completion and for setting up tty process group.
*/
void
tty_init(int init_ttystate)
{
int do_close = 1;
int tfd;
if (tty_fd >= 0) {
close(tty_fd);
tty_fd = -1;
}
tty_devtty = 1;
if ((tfd = open("/dev/tty", O_RDWR, 0)) < 0) {
tty_devtty = 0;
warningf(false, "No controlling tty (open /dev/tty: %s)",
strerror(errno));
}
if (tfd < 0) {
do_close = 0;
if (isatty(0))
tfd = 0;
else if (isatty(2))
tfd = 2;
else {
warningf(false, "Can't find tty file descriptor");
return;
}
}
if ((tty_fd = fcntl(tfd, F_DUPFD_CLOEXEC, FDBASE)) < 0) {
warningf(false, "j_ttyinit: dup of tty fd failed: %s",
strerror(errno));
} else if (init_ttystate)
tcgetattr(tty_fd, &tty_state);
if (do_close)
close(tfd);
}
void
tty_close(void)
{
if (tty_fd >= 0) {
close(tty_fd);
tty_fd = -1;
}
}
|
