1 /* vi: set sw=4 ts=4: */
3 * shows keys pressed. inspired by kbd package
5 * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
7 * Licensed under GPLv2, see file LICENSE in this source tree.
16 struct termios tio, tio0;
18 #define G (*ptr_to_globals)
19 #define kbmode (G.kbmode)
22 #define INIT_G() do { \
23 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
28 // also used by microcom
30 static void xget1(struct termios *t, struct termios *oldt)
32 tcgetattr(STDIN_FILENO, oldt);
37 static void xset1(struct termios *t)
39 int ret = tcsetattr(STDIN_FILENO, TCSAFLUSH, t);
41 bb_perror_msg("can't tcsetattr for stdin");
45 int showkey_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
46 int showkey_main(int argc UNUSED_PARAM, char **argv)
49 OPT_a = (1<<0), // display the decimal/octal/hex values of the keys
50 OPT_k = (1<<1), // display only the interpreted keycodes (default)
51 OPT_s = (1<<2), // display only the raw scan-codes
56 // FIXME: aks are all mutually exclusive
57 getopt32(argv, "aks");
59 // get keyboard settings
60 xioctl(STDIN_FILENO, KDGKBMODE, &kbmode);
61 printf("kb mode was %s\n\nPress any keys. Program terminates %s\n\n",
62 kbmode == K_RAW ? "RAW" :
63 (kbmode == K_XLATE ? "XLATE" :
64 (kbmode == K_MEDIUMRAW ? "MEDIUMRAW" :
65 (kbmode == K_UNICODE ? "UNICODE" : "UNKNOWN")))
66 , (option_mask32 & OPT_a) ? "on EOF (ctrl-D)" : "10s after last keypress"
69 // prepare for raw mode
71 // put stdin in raw mode
74 if (option_mask32 & OPT_a) {
77 // just read stdin char by char
78 while (1 == read(STDIN_FILENO, &c, 1)) {
79 printf("%3u 0%03o 0x%02x\r\n", c, c, c);
80 if (04 /*CTRL-D*/ == c)
84 // set raw keyboard mode
85 xioctl(STDIN_FILENO, KDSKBMODE, (void *)(ptrdiff_t)((option_mask32 & OPT_k) ? K_MEDIUMRAW : K_RAW));
87 // we should exit on any signal; signals should interrupt read
88 bb_signals_recursive_norestart(BB_FATAL_SIGS, record_signo);
90 // read and show scancodes
91 while (!bb_got_signal) {
98 n = read(STDIN_FILENO, buf, sizeof(buf));
101 if (option_mask32 & OPT_s) {
102 // show raw scancodes
103 printf("0x%02x ", buf[i++]);
105 // show interpreted scancodes (default)
110 && (buf[i+1] & 0x80) != 0
111 && (buf[i+2] & 0x80) != 0
113 kc = ((buf[i+1] & 0x7f) << 7) | (buf[i+2] & 0x7f);
119 printf("keycode %3u %s", kc, (c & 0x80) ? "release" : "press");
126 // restore keyboard and console settings
128 xioctl(STDIN_FILENO, KDSKBMODE, (void *)(ptrdiff_t)kbmode);