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28#include "libbb.h"
29#include <linux/kd.h>
30
31
32struct globals {
33 int kbmode;
34 struct termios tio, tio0;
35};
36#define G (*ptr_to_globals)
37#define kbmode (G.kbmode)
38#define tio (G.tio)
39#define tio0 (G.tio0)
40#define INIT_G() do { \
41 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
42} while (0)
43
44
45
46
47
48static void xget1(struct termios *t, struct termios *oldt)
49{
50 tcgetattr(STDIN_FILENO, oldt);
51 *t = *oldt;
52 cfmakeraw(t);
53}
54
55static void xset1(struct termios *t)
56{
57 int ret = tcsetattr(STDIN_FILENO, TCSAFLUSH, t);
58 if (ret) {
59 bb_perror_msg("can't tcsetattr for stdin");
60 }
61}
62
63int showkey_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
64int showkey_main(int argc UNUSED_PARAM, char **argv)
65{
66 enum {
67 OPT_a = (1<<0),
68 OPT_k = (1<<1),
69 OPT_s = (1<<2),
70 };
71
72 INIT_G();
73
74
75 getopt32(argv, "aks");
76
77
78 xget1(&tio, &tio0);
79
80 xset1(&tio);
81
82#define press_keys "Press any keys, program terminates %s:\r\n\n"
83
84 if (option_mask32 & OPT_a) {
85
86 unsigned char c;
87
88 printf(press_keys, "on EOF (ctrl-D)");
89
90
91 while (1 == read(STDIN_FILENO, &c, 1)) {
92 printf("%3u 0%03o 0x%02x\r\n", c, c, c);
93 if (04 == c)
94 break;
95 }
96 } else {
97
98 xioctl(STDIN_FILENO, KDGKBMODE, &kbmode);
99 printf("Keyboard mode was %s.\r\n\n",
100 kbmode == K_RAW ? "RAW" :
101 (kbmode == K_XLATE ? "XLATE" :
102 (kbmode == K_MEDIUMRAW ? "MEDIUMRAW" :
103 (kbmode == K_UNICODE ? "UNICODE" : "UNKNOWN")))
104 );
105
106
107 xioctl(STDIN_FILENO, KDSKBMODE, (void *)(ptrdiff_t)((option_mask32 & OPT_k) ? K_MEDIUMRAW : K_RAW));
108
109
110 bb_signals_recursive_norestart(BB_FATAL_SIGS, record_signo);
111
112
113 printf(press_keys, "10s after last keypress");
114
115
116 while (!bb_got_signal) {
117 char buf[18];
118 int i, n;
119
120
121 alarm(10);
122
123
124 n = read(STDIN_FILENO, buf, sizeof(buf));
125 i = 0;
126 while (i < n) {
127 if (option_mask32 & OPT_s) {
128
129 printf("0x%02x ", buf[i++]);
130 } else {
131
132 char c = buf[i];
133 int kc;
134 if (i+2 < n
135 && (c & 0x7f) == 0
136 && (buf[i+1] & 0x80) != 0
137 && (buf[i+2] & 0x80) != 0
138 ) {
139 kc = ((buf[i+1] & 0x7f) << 7) | (buf[i+2] & 0x7f);
140 i += 3;
141 } else {
142 kc = (c & 0x7f);
143 i++;
144 }
145 printf("keycode %3u %s", kc, (c & 0x80) ? "release" : "press");
146 }
147 }
148 puts("\r");
149 }
150
151
152 xioctl(STDIN_FILENO, KDSKBMODE, (void *)(ptrdiff_t)kbmode);
153 }
154
155
156 xset1(&tio0);
157
158 return EXIT_SUCCESS;
159}
160