imapfilter/imapfilter/tty.c

#include <stdio.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 (tcgetattr(fileno(stdout), &otio)) {
        error("imapfilter: getting term attributes; %s\n", strerror(errno));
        return ERROR_TERMIO;
    }
    
    return 0;
}


/*
 * Disable echo.
 */
int tty_disable_echo(void)
{
    ntio = otio;
    ntio.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);

    flags |= FLAG_TTY_MODIFIED;

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


/*
 * Restore original term attributes.
 */
int tty_restore(void)
{
    if (!(flags & FLAG_TTY_MODIFIED))
        return 0;
    
    if (tcsetattr(fileno(stdout), TCSAFLUSH, &otio)) {
        error("imapfilter: setting term attributes; %s\n", strerror(errno));
        return ERROR_TERMIO;
    }

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