imapfilter/imapfilter/tty.c

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <termios.h>

#include "config.h"
#include "imapfilter.h"


extern unsigned int flags;

static struct termios otio, ntio;       /* Original and new tty settings. */


/*
 * Store original term attributes.
 */
int
tty_store(void)
{
        if (isatty(fileno(stdin)))
                flags |= FLAG_TTY;

        if (tcgetattr(fileno(stdin), &otio)) {
                error("getting term attributes; %s\n", strerror(errno));
                return ERROR_TERMIO;
        }
        return 0;
}


/*
 * Disable echo.
 */
int
tty_disable_echo(void)
{
        if (!(flags & FLAG_TTY))
                return 0;

        ntio = otio;
        ntio.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);

        flags |= FLAG_TTY_MODIFIED;

        if (tcsetattr(fileno(stdin), TCSAFLUSH, &ntio)) {
                error("setting term attributes; %s\n", strerror(errno));
                return ERROR_TERMIO;
        }
        return 0;
}


/*
 * Restore original term attributes.
 */
int
tty_restore(void)
{
        if (!(flags & FLAG_TTY) || !(flags & FLAG_TTY_MODIFIED))
                return 0;

        if (tcsetattr(fileno(stdin), TCSAFLUSH, &otio)) {
                error("setting term attributes; %s\n", strerror(errno));
                return ERROR_TERMIO;
        }
        flags &= ~(FLAG_TTY_MODIFIED);

        return 0;
}
1	lefcha	1.1	#include <stdio.h>
2	lefcha	1.6	#include <unistd.h>
3	lefcha	1.1	#include <string.h>
4			#include <errno.h>
5			#include <termios.h>
6
7	lefcha	1.2	#include "config.h"
8	lefcha	1.1	#include "imapfilter.h"
9
10
11	lefcha	1.4	extern unsigned int flags;
12
13	lefcha	1.3	static struct termios otio, ntio; /* Original and new tty settings. */
14	lefcha	1.1
15
16			/*
17			* Store original term attributes.
18			*/
19	lefcha	1.7	int
20			tty_store(void)
21	lefcha	1.1	{
22	lefcha	1.7	if (isatty(fileno(stdin)))
23			flags \|= FLAG_TTY;
24	lefcha	1.6
25	lefcha	1.7	if (tcgetattr(fileno(stdin), &otio)) {
26			error("getting term attributes; %s\n", strerror(errno));
27			return ERROR_TERMIO;
28			}
29			return 0;
30	lefcha	1.1	}
31
32
33			/*
34			* Disable echo.
35			*/
36	lefcha	1.7	int
37			tty_disable_echo(void)
38	lefcha	1.1	{
39	lefcha	1.7	if (!(flags & FLAG_TTY))
40			return 0;
41	lefcha	1.6
42	lefcha	1.7	ntio = otio;
43			ntio.c_lflag &= ~(ECHO \| ECHOE \| ECHOK \| ECHONL);
44	lefcha	1.4
45	lefcha	1.7	flags \|= FLAG_TTY_MODIFIED;
46	lefcha	1.2
47	lefcha	1.7	if (tcsetattr(fileno(stdin), TCSAFLUSH, &ntio)) {
48			error("setting term attributes; %s\n", strerror(errno));
49			return ERROR_TERMIO;
50			}
51			return 0;
52	lefcha	1.1	}
53
54
55			/*
56			* Restore original term attributes.
57			*/
58	lefcha	1.7	int
59			tty_restore(void)
60	lefcha	1.1	{
61	lefcha	1.7	if (!(flags & FLAG_TTY) \|\| !(flags & FLAG_TTY_MODIFIED))
62			return 0;
63	lefcha	1.5
64	lefcha	1.7	if (tcsetattr(fileno(stdin), TCSAFLUSH, &otio)) {
65			error("setting term attributes; %s\n", strerror(errno));
66			return ERROR_TERMIO;
67			}
68			flags &= ~(FLAG_TTY_MODIFIED);
69	lefcha	1.4
70	lefcha	1.7	return 0;
71	lefcha	1.1	}