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("imapfilter: 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("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) || !(flags & FLAG_TTY_MODIFIED))
        return 0;

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