Beispiel #1
0
int showkey_main(int argc UNUSED_PARAM, char **argv)
{
	enum {
		OPT_a = (1<<0), // display the decimal/octal/hex values of the keys
		OPT_k = (1<<1), // display only the interpreted keycodes (default)
		OPT_s = (1<<2), // display only the raw scan-codes
	};

	INIT_G();

	// FIXME: aks are all mutually exclusive
	getopt32(argv, "aks");

	// prepare for raw mode
	xget1(&tio, &tio0);
	// put stdin in raw mode
	xset1(&tio);

#define press_keys "Press any keys, program terminates %s:\r\n\n"

	if (option_mask32 & OPT_a) {
		// just read stdin char by char
		unsigned char c;

		printf(press_keys, "on EOF (ctrl-D)");

		// read and show byte values
		while (1 == read(STDIN_FILENO, &c, 1)) {
			printf("%3u 0%03o 0x%02x\r\n", c, c, c);
			if (04 /*CTRL-D*/ == c)
				break;
		}

	} else {
		// we assume a PC keyboard
		xioctl(STDIN_FILENO, KDGKBMODE, &kbmode);
		printf("Keyboard mode was %s.\r\n\n",
			kbmode == K_RAW ? "RAW" :
				(kbmode == K_XLATE ? "XLATE" :
					(kbmode == K_MEDIUMRAW ? "MEDIUMRAW" :
						(kbmode == K_UNICODE ? "UNICODE" : "UNKNOWN")))
		);

		// set raw keyboard mode
		xioctl(STDIN_FILENO, KDSKBMODE, (void *)(ptrdiff_t)((option_mask32 & OPT_k) ? K_MEDIUMRAW : K_RAW));

		// we should exit on any signal; signals should interrupt read
		bb_signals_recursive_norestart(BB_FATAL_SIGS, record_signo);

		// inform user that program ends after time of inactivity
		printf(press_keys, "10s after last keypress");

		// read and show scancodes
		while (!bb_got_signal) {
			char buf[18];
			int i, n;

			// setup 10s watchdog
			alarm(10);

			// read scancodes
			n = read(STDIN_FILENO, buf, sizeof(buf));
			i = 0;
			while (i < n) {
				if (option_mask32 & OPT_s) {
					// show raw scancodes
					printf("0x%02x ", buf[i++]);
				} else {
					// show interpreted scancodes (default)
					char c = buf[i];
					int kc;
					if (i+2 < n
					 && (c & 0x7f) == 0
					 && (buf[i+1] & 0x80) != 0
					 && (buf[i+2] & 0x80) != 0
					) {
						kc = ((buf[i+1] & 0x7f) << 7) | (buf[i+2] & 0x7f);
						i += 3;
					} else {
						kc = (c & 0x7f);
						i++;
					}
					printf("keycode %3u %s", kc, (c & 0x80) ? "release" : "press");
				}
			}
			puts("\r");
		}

		// restore keyboard mode
		xioctl(STDIN_FILENO, KDSKBMODE, (void *)(ptrdiff_t)kbmode);
	}

	// restore console settings
	xset1(&tio0);

	return EXIT_SUCCESS;
}
Beispiel #2
0
int microcom_main(int argc UNUSED_PARAM, char **argv)
{
	int sfd;
	int nfd;
	struct pollfd pfd[2];
	struct termios tio0, tiosfd, tio;
	char *device_lock_file;
	enum {
		OPT_X = 1 << 0, // do not respect Ctrl-X, Ctrl-@
		OPT_s = 1 << 1, // baudrate
		OPT_d = 1 << 2, // wait for device response, ms
		OPT_t = 1 << 3, // timeout, ms
	};
	speed_t speed = 9600;
	int delay = -1;
	int timeout = -1;
	unsigned opts;

	// fetch options
	opt_complementary = "=1:s+:d+:t+"; // exactly one arg, numeric options
	opts = getopt32(argv, "Xs:d:t:", &speed, &delay, &timeout);
//	argc -= optind;
	argv += optind;

	// try to create lock file in /var/lock
	device_lock_file = (char *)bb_basename(argv[0]);
	device_lock_file = xasprintf("/var/lock/LCK..%s", device_lock_file);
	sfd = open(device_lock_file, O_CREAT | O_WRONLY | O_TRUNC | O_EXCL, 0644);
	if (sfd < 0) {
		// device already locked -> bail out
		if (errno == EEXIST)
			bb_perror_msg_and_die("can't create %s", device_lock_file);
		// can't create lock -> don't care
		if (ENABLE_FEATURE_CLEAN_UP)
			free(device_lock_file);
		device_lock_file = NULL;
	} else {
		// %4d to make concurrent mgetty (if any) happy.
		// Mgetty treats 4-bytes lock files as binary,
		// not text, PID. Making 5+ char file. Brrr...
		fdprintf(sfd, "%4d\n", getpid());
		close(sfd);
	}

	// setup signals
	bb_signals(0
		+ (1 << SIGHUP)
		+ (1 << SIGINT)
		+ (1 << SIGTERM)
		+ (1 << SIGPIPE)
		, signal_handler);

	// error exit code if we fail to open the device
	signalled = 1;

	// open device
	sfd = open_or_warn(argv[0], O_RDWR | O_NOCTTY | O_NONBLOCK);
	if (sfd < 0)
		goto done;
	fcntl(sfd, F_SETFL, 0);

	// put device to "raw mode"
	xget1(sfd, &tio, &tiosfd);
	// set device speed
	cfsetspeed(&tio, tty_value_to_baud(speed));
	if (xset1(sfd, &tio, argv[0]))
		goto done;

	// put stdin to "raw mode" (if stdin is a TTY),
	// handle one character at a time
	if (isatty(STDIN_FILENO)) {
		xget1(STDIN_FILENO, &tio, &tio0);
		if (xset1(STDIN_FILENO, &tio, "stdin"))
			goto done;
	}

	// main loop: check with poll(), then read/write bytes across
	pfd[0].fd = sfd;
	pfd[0].events = POLLIN;
	pfd[1].fd = STDIN_FILENO;
	pfd[1].events = POLLIN;

	signalled = 0;
	nfd = 2;
	while (!signalled && safe_poll(pfd, nfd, timeout) > 0) {
		if (nfd > 1 && pfd[1].revents) {
			char c;
			// read from stdin -> write to device
			if (safe_read(STDIN_FILENO, &c, 1) < 1) {
				// don't poll stdin anymore if we got EOF/error
				nfd--;
				goto skip_write;
			}
			// do we need special processing?
			if (!(opts & OPT_X)) {
				// ^@ sends Break
				if (VINTR == c) {
					tcsendbreak(sfd, 0);
					goto skip_write;
				}
				// ^X exits
				if (24 == c)
					break;
			}
			write(sfd, &c, 1);
			if (delay >= 0)
				safe_poll(pfd, 1, delay);
skip_write: ;
		}
		if (pfd[0].revents) {
#define iobuf bb_common_bufsiz1
			ssize_t len;
			// read from device -> write to stdout
			len = safe_read(sfd, iobuf, sizeof(iobuf));
			if (len > 0)
				full_write(STDOUT_FILENO, iobuf, len);
			else {
				// EOF/error -> bail out
				signalled = SIGHUP;
				break;
			}
		}
	}

	// restore device mode
	tcsetattr(sfd, TCSAFLUSH, &tiosfd);

	if (isatty(STDIN_FILENO))
		tcsetattr(STDIN_FILENO, TCSAFLUSH, &tio0);

done:
	if (device_lock_file)
		unlink(device_lock_file);

	return signalled;
}