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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
/****************************************************************
* *
* Copyright (c) 2001-2023 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include <errno.h>
#include "gtm_stdio.h"
#include "gtm_unistd.h"
#include "gtm_termios.h"
#include "gtm_signal.h" /* for SIGPROCMASK used inside Tcsetattr */
#include "eintr_wrappers.h"
#include "mu_term_setup.h"
#define STDOUT_FILENO 1
#define STDERR_FILENO 2
static struct termios tty_settings;
static boolean_t mu_get_term_invoked = FALSE;
static boolean_t get_stdout_charc_pass = TRUE;
static boolean_t get_stderr_charc_pass = TRUE;
void mu_get_term_characterstics(void)
{
assert(!mu_get_term_invoked); /* No need to invoke this more than once per process. If assert fails fix second caller. */
mu_get_term_invoked = TRUE;
if ((get_stdout_charc_pass = isatty(STDOUT_FILENO)))
{
if (-1 == tcgetattr(STDOUT_FILENO, &tty_settings))
{
get_stdout_charc_pass = FALSE;
PERROR("tcgetattr :");
FPRINTF(stderr, "Unable to get terminal characterstics for standard out\n");
}
} else if ((get_stderr_charc_pass = isatty(STDERR_FILENO)))
{
if (-1 == tcgetattr(STDERR_FILENO, &tty_settings))
{
get_stderr_charc_pass = FALSE;
PERROR("tcgetattr :");
FPRINTF(stderr, "Unable to get terminal characterstics for standard err\n");
}
}
}
void mu_reset_term_characterstics(void)
{
int tcsetattr_res;
int save_errno;
if (!mu_get_term_invoked)
return; /* We did not initialize "tty_settings" in this process so dont use it */
/* Do not use TCSAFLUSH as it drains all buffered (but yet unprocessed) input in the terminal
* even if that was for the next command at the shell prompt. So use TCSADRAIN instead.
*/
if (get_stdout_charc_pass)
{
Tcsetattr(STDOUT_FILENO, TCSADRAIN, &tty_settings, tcsetattr_res, save_errno);
if (-1 == tcsetattr_res)
{
PERROR("tcsetattr :");
FPRINTF(stderr, "Unable to set terminal characterstics for standard out\n");
}
} else if (get_stderr_charc_pass)
{
Tcsetattr(STDERR_FILENO, TCSADRAIN, &tty_settings, tcsetattr_res, save_errno);
if (-1 == tcsetattr_res)
{
PERROR("tcsetattr :");
FPRINTF(stderr, "Unable to set terminal characterstics for standard err\n");
}
}
}
|
