test/scancodes/test-scancodes.c

   1 #define _MINIX
   2
   3 #include <errno.h>
   4 #include <signal.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <termios.h>
   9 #include <unistd.h>
  10
  11 /* list of scancodes to demonstrate whether the keycodes are correct;
  12  * source: http://www.win.tue.nl/~aeb/linux/kbd/scancodes-1.html
  13  */
  14 static char *keydescr[] = {
  15         NULL,           /* 0x00 */
  16         "Esc",          /* 0x01 */
  17         "1!",           /* 0x02 */
  18         "2@",           /* 0x03 */
  19         "3#",           /* 0x04 */
  20         "4$",           /* 0x05 */
  21         "5%",           /* 0x06 */
  22         "6^",           /* 0x07 */
  23         "7&",           /* 0x08 */
  24         "8*",           /* 0x09 */
  25         "9(",           /* 0x0a */
  26         "0)",           /* 0x0b */
  27         "-_",           /* 0x0c */
  28         "=+",           /* 0x0d */
  29         "Backspace",    /* 0x0e */
  30         "Tab",          /* 0x0f */
  31         "Q",            /* 0x10 */
  32         "W",            /* 0x11 */
  33         "E",            /* 0x12 */
  34         "R",            /* 0x13 */
  35         "T",            /* 0x14 */
  36         "Y",            /* 0x15 */
  37         "U",            /* 0x16 */
  38         "I",            /* 0x17 */
  39         "O",            /* 0x18 */
  40         "P",            /* 0x19 */
  41         "[{",           /* 0x1a */
  42         "]}",           /* 0x1b */
  43         "Enter",        /* 0x1c */
  44         "LCtrl",        /* 0x1d */
  45         "A",            /* 0x1e */
  46         "S",            /* 0x1f */
  47         "D",            /* 0x20 */
  48         "F",            /* 0x21 */
  49         "G",            /* 0x22 */
  50         "H",            /* 0x23 */
  51         "J",            /* 0x24 */
  52         "K",            /* 0x25 */
  53         "L",            /* 0x26 */
  54         ";:",           /* 0x27 */
  55         "'\"",          /* 0x28 */
  56         "`~",           /* 0x29 */
  57         "LShift",       /* 0x2a */
  58         "\\|",          /* 0x2b */
  59         "Z",            /* 0x2c */
  60         "X",            /* 0x2d */
  61         "C",            /* 0x2e */
  62         "V",            /* 0x2f */
  63         "B",            /* 0x30 */
  64         "N",            /* 0x31 */
  65         "M",            /* 0x32 */
  66         ",<",           /* 0x33 */
  67         ".>",           /* 0x34 */
  68         "/?",           /* 0x35 */
  69         "RShift",       /* 0x36 */
  70         "Keypad-*",     /* 0x37 */
  71         "LAlt",         /* 0x38 */
  72         "Space bar",    /* 0x39 */
  73         "CapsLock",     /* 0x3a */
  74         "F1",           /* 0x3b */
  75         "F2",           /* 0x3c */
  76         "F3",           /* 0x3d */
  77         "F4",           /* 0x3e */
  78         "F5",           /* 0x3f */
  79         "F6",           /* 0x40 */
  80         "F7",           /* 0x41 */
  81         "F8",           /* 0x42 */
  82         "F9",           /* 0x43 */
  83         "F10",          /* 0x44 */
  84         "NumLock",      /* 0x45 */
  85         "ScrollLock",   /* 0x46 */
  86         "Keypad-7/Home",/* 0x47 */
  87         "Keypad-8/Up",  /* 0x48 */
  88         "Keypad-9/PgUp",/* 0x49 */
  89         "Keypad--",     /* 0x4a */
  90         "Keypad-4/Left",/* 0x4b */
  91         "Keypad-5",     /* 0x4c */
  92         "Keypad-6/Right",/* 0x4d */
  93         "Keypad-+",     /* 0x4e */
  94         "Keypad-1/End", /* 0x4f */
  95         "Keypad-2/Down",/* 0x50 */
  96         "Keypad-3/PgDn",/* 0x51 */
  97         "Keypad-0/Ins", /* 0x52 */
  98         "Keypad-./Del", /* 0x53 */
  99         "Alt-SysRq",    /* 0x54 */
 100         NULL,           /* 0x55 */
 101         NULL,           /* 0x56 */
 102         "F11",          /* 0x57 */
 103         "F12",          /* 0x58 */
 104         NULL,           /* 0x59 */
 105         NULL,           /* 0x5a */
 106         NULL,           /* 0x5b */
 107         NULL,           /* 0x5c */
 108         NULL,           /* 0x5d */
 109         NULL,           /* 0x5e */
 110         NULL,           /* 0x5f */
 111         NULL,           /* 0x60 */
 112         NULL,           /* 0x61 */
 113         NULL,           /* 0x62 */
 114         NULL,           /* 0x63 */
 115         NULL,           /* 0x64 */
 116         NULL,           /* 0x65 */
 117         NULL,           /* 0x66 */
 118         NULL,           /* 0x67 */
 119         NULL,           /* 0x68 */
 120         NULL,           /* 0x69 */
 121         NULL,           /* 0x6a */
 122         NULL,           /* 0x6b */
 123         NULL,           /* 0x6c */
 124         NULL,           /* 0x6d */
 125         NULL,           /* 0x6e */
 126         NULL,           /* 0x6f */
 127         NULL,           /* 0x70 */
 128         NULL,           /* 0x71 */
 129         NULL,           /* 0x72 */
 130         NULL,           /* 0x73 */
 131         NULL,           /* 0x74 */
 132         NULL,           /* 0x75 */
 133         NULL,           /* 0x76 */
 134         NULL,           /* 0x77 */
 135         NULL,           /* 0x78 */
 136         NULL,           /* 0x79 */
 137         NULL,           /* 0x7a */
 138         NULL,           /* 0x7b */
 139         NULL,           /* 0x7c */
 140         NULL,           /* 0x7d */
 141         NULL,           /* 0x7e */
 142         NULL,           /* 0x7f */
 143 };
 144
 145 static char *keydescresc[] = {
 146         NULL,           /* 0xe0 0x00 */
 147         NULL,           /* 0xe0 0x01 */
 148         NULL,           /* 0xe0 0x02 */
 149         NULL,           /* 0xe0 0x03 */
 150         NULL,           /* 0xe0 0x04 */
 151         NULL,           /* 0xe0 0x05 */
 152         NULL,           /* 0xe0 0x06 */
 153         NULL,           /* 0xe0 0x07 */
 154         NULL,           /* 0xe0 0x08 */
 155         NULL,           /* 0xe0 0x09 */
 156         NULL,           /* 0xe0 0x0a */
 157         NULL,           /* 0xe0 0x0b */
 158         NULL,           /* 0xe0 0x0c */
 159         NULL,           /* 0xe0 0x0d */
 160         NULL,           /* 0xe0 0x0e */
 161         NULL,           /* 0xe0 0x0f */
 162         NULL,           /* 0xe0 0x10 */
 163         NULL,           /* 0xe0 0x11 */
 164         NULL,           /* 0xe0 0x12 */
 165         NULL,           /* 0xe0 0x13 */
 166         NULL,           /* 0xe0 0x14 */
 167         NULL,           /* 0xe0 0x15 */
 168         NULL,           /* 0xe0 0x16 */
 169         NULL,           /* 0xe0 0x17 */
 170         NULL,           /* 0xe0 0x18 */
 171         NULL,           /* 0xe0 0x19 */
 172         NULL,           /* 0xe0 0x1a */
 173         NULL,           /* 0xe0 0x1b */
 174         "Keypad Enter", /* 0xe0 0x1c */
 175         "RCtrl",        /* 0xe0 0x1d */
 176         NULL,           /* 0xe0 0x1e */
 177         NULL,           /* 0xe0 0x1f */
 178         NULL,           /* 0xe0 0x20 */
 179         NULL,           /* 0xe0 0x21 */
 180         NULL,           /* 0xe0 0x22 */
 181         NULL,           /* 0xe0 0x23 */
 182         NULL,           /* 0xe0 0x24 */
 183         NULL,           /* 0xe0 0x25 */
 184         NULL,           /* 0xe0 0x26 */
 185         NULL,           /* 0xe0 0x27 */
 186         NULL,           /* 0xe0 0x28 */
 187         NULL,           /* 0xe0 0x29 */
 188         "fake LShift",  /* 0xe0 0x2a */
 189         NULL,           /* 0xe0 0x2b */
 190         NULL,           /* 0xe0 0x2c */
 191         NULL,           /* 0xe0 0x2d */
 192         NULL,           /* 0xe0 0x2e */
 193         NULL,           /* 0xe0 0x2f */
 194         NULL,           /* 0xe0 0x30 */
 195         NULL,           /* 0xe0 0x31 */
 196         NULL,           /* 0xe0 0x32 */
 197         NULL,           /* 0xe0 0x33 */
 198         NULL,           /* 0xe0 0x34 */
 199         "Keypad-/",     /* 0xe0 0x35 */
 200         "fake RShift",  /* 0xe0 0x36 */
 201         "Ctrl-PrtScn",  /* 0xe0 0x37 */
 202         "RAlt",         /* 0xe0 0x38 */
 203         NULL,           /* 0xe0 0x39 */
 204         NULL,           /* 0xe0 0x3a */
 205         NULL,           /* 0xe0 0x3b */
 206         NULL,           /* 0xe0 0x3c */
 207         NULL,           /* 0xe0 0x3d */
 208         NULL,           /* 0xe0 0x3e */
 209         NULL,           /* 0xe0 0x3f */
 210         NULL,           /* 0xe0 0x40 */
 211         NULL,           /* 0xe0 0x41 */
 212         NULL,           /* 0xe0 0x42 */
 213         NULL,           /* 0xe0 0x43 */
 214         NULL,           /* 0xe0 0x44 */
 215         NULL,           /* 0xe0 0x45 */
 216         "Ctrl-Break",   /* 0xe0 0x46 */
 217         "Grey Home",    /* 0xe0 0x47 */
 218         "Grey Up",      /* 0xe0 0x48 */
 219         "Grey PgUp",    /* 0xe0 0x49 */
 220         NULL,           /* 0xe0 0x4a */
 221         "Grey Left",    /* 0xe0 0x4b */
 222         NULL,           /* 0xe0 0x4c */
 223         "Grey Right",   /* 0xe0 0x4d */
 224         NULL,           /* 0xe0 0x4e */
 225         "Grey End",     /* 0xe0 0x4f */
 226         "Grey Down",    /* 0xe0 0x50 */
 227         "Grey PgDn",    /* 0xe0 0x51 */
 228         "Grey Insert",  /* 0xe0 0x52 */
 229         "Grey Delete",  /* 0xe0 0x53 */
 230         NULL,           /* 0xe0 0x54 */
 231         NULL,           /* 0xe0 0x55 */
 232         NULL,           /* 0xe0 0x56 */
 233         NULL,           /* 0xe0 0x57 */
 234         NULL,           /* 0xe0 0x58 */
 235         NULL,           /* 0xe0 0x59 */
 236         NULL,           /* 0xe0 0x5a */
 237         "LeftWindow",   /* 0xe0 0x5b */
 238         "RightWindow",  /* 0xe0 0x5c */
 239         "Menu",         /* 0xe0 0x5d */
 240         "Power",        /* 0xe0 0x5e */
 241         "Sleep",        /* 0xe0 0x5f */
 242         NULL,           /* 0xe0 0x60 */
 243         NULL,           /* 0xe0 0x61 */
 244         NULL,           /* 0xe0 0x62 */
 245         "Wake",         /* 0xe0 0x63 */
 246         NULL,           /* 0xe0 0x64 */
 247         NULL,           /* 0xe0 0x65 */
 248         NULL,           /* 0xe0 0x66 */
 249         NULL,           /* 0xe0 0x67 */
 250         NULL,           /* 0xe0 0x68 */
 251         NULL,           /* 0xe0 0x69 */
 252         NULL,           /* 0xe0 0x6a */
 253         NULL,           /* 0xe0 0x6b */
 254         NULL,           /* 0xe0 0x6c */
 255         NULL,           /* 0xe0 0x6d */
 256         NULL,           /* 0xe0 0x6e */
 257         NULL,           /* 0xe0 0x6f */
 258         NULL,           /* 0xe0 0x70 */
 259         NULL,           /* 0xe0 0x71 */
 260         NULL,           /* 0xe0 0x72 */
 261         NULL,           /* 0xe0 0x73 */
 262         NULL,           /* 0xe0 0x74 */
 263         NULL,           /* 0xe0 0x75 */
 264         NULL,           /* 0xe0 0x76 */
 265         NULL,           /* 0xe0 0x77 */
 266         NULL,           /* 0xe0 0x78 */
 267         NULL,           /* 0xe0 0x79 */
 268         NULL,           /* 0xe0 0x7a */
 269         NULL,           /* 0xe0 0x7b */
 270         NULL,           /* 0xe0 0x7c */
 271         NULL,           /* 0xe0 0x7d */
 272         NULL,           /* 0xe0 0x7e */
 273         NULL,           /* 0xe0 0x7f */
 274 };
 275
 276 #define CHECK(r) check((r), #r, __FILE__, __LINE__)
 277
 278 int check(long r, const char *expr, const char *file, int line)
 279 {
 280         char buffer[256];
 281         if (r < 0) {
 282                 snprintf(buffer, sizeof(buffer), "%s:%d: %s: result %ld, %s",
 283                         file, line, expr, r, strerror(errno));
 284                 exit(-1);
 285         }
 286         return r;
 287 }
 288
 289 #define SCODE_ESC       0xe0
 290 #define SCODE_BREAK     0x80
 291
 292 static int testscancode(int fd)
 293 {
 294         static int escape, lctrl, rctrl;
 295         ssize_t count;
 296         unsigned char scode;
 297         char *scodedescr;
 298
 299         /* read a scancode and test for EOF */
 300         CHECK(count = read(fd, &scode, sizeof(scode)));
 301         if (count < sizeof(scode)) {
 302                 return 0;
 303         }
 304
 305         /* print scancode */
 306         printf("0x%.2x ", scode);
 307         fflush(stdout);
 308
 309         /* test for escape */
 310         if (!escape && scode == SCODE_ESC) {
 311                 escape = 1;
 312                 return 1;
 313         }
 314
 315         /* describe scancode */
 316         scodedescr = (escape ? keydescresc : keydescr)[scode & ~SCODE_BREAK];
 317         if (scodedescr)
 318                 printf("[%s] ", scodedescr);
 319
 320         if (scode & SCODE_BREAK)
 321                 printf("up\n");
 322         else
 323                 printf("down\n");
 324
 325         fflush(stdout);
 326
 327         /* exit on ctrl-C */
 328         if ((scode & ~SCODE_BREAK) == 0x1d) {
 329                 if (escape)
 330                         rctrl = !(scode & SCODE_BREAK);
 331                 else
 332                         lctrl = !(scode & SCODE_BREAK);
 333         }
 334         if ((lctrl || rctrl) && !escape && scode == 0x2e) {
 335                 return 0;
 336         }
 337
 338         /* next key is not escaped */
 339         escape = 0;
 340
 341         return 1;
 342 }
 343
 344 static volatile int terminate;
 345
 346 static void set_terminate(int signum)
 347 {
 348         terminate = signum;
 349 }
 350
 351 static int testscancodes(int fd)
 352 {
 353         struct termios termios_old, termios_scan;
 354
 355         /* this test only works with a TTY as stdin */
 356         if (!CHECK(isatty(fd))) {
 357                 printf("warning: this test can only be run from a console\n");
 358                 return 0;
 359         }
 360
 361         /* catch fatal signals to restore the console */
 362         CHECK((signal(SIGHUP, set_terminate) == SIG_ERR) ? -1 : 0);
 363         CHECK((signal(SIGINT, set_terminate) == SIG_ERR) ? -1 : 0);
 364         CHECK((signal(SIGQUIT, set_terminate) == SIG_ERR) ? -1 : 0);
 365         CHECK((signal(SIGABRT, set_terminate) == SIG_ERR) ? -1 : 0);
 366         CHECK((signal(SIGPIPE, set_terminate) == SIG_ERR) ? -1 : 0);
 367         CHECK((signal(SIGTERM, set_terminate) == SIG_ERR) ? -1 : 0);
 368
 369         /* configure tty in raw input mode with scancodes and no echo */
 370         CHECK(tcgetattr(fd, &termios_old));
 371         termios_scan = termios_old;
 372         termios_scan.c_iflag &= ~(BRKINT | ICRNL | IGNBRK | IGNCR | IGNPAR);
 373         termios_scan.c_iflag &= ~(INLCR | INPCK | ISTRIP);
 374         termios_scan.c_iflag &= ~(IXOFF | IXON | PARMRK);
 375         termios_scan.c_iflag |= SCANCODES;
 376         termios_scan.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
 377         termios_scan.c_lflag &= ~(ICANON | IEXTEN | ISIG | NOFLSH);
 378         CHECK(tcsetattr(fd, TCSANOW, &termios_scan));
 379
 380         /* test: is scancode input supported? */
 381         CHECK(tcgetattr(fd, &termios_scan));
 382         if (termios_scan.c_iflag & SCANCODES) {
 383                 while (!terminate && CHECK(testscancode(fd))) ;
 384         } else {
 385                 printf("warning: cannot enable SCANCODES "
 386                         "(are you running from a console?)\n");
 387         }
 388
 389         /* report if closed by a signal */
 390         if (terminate) {
 391                 printf("received signal %d, shutting down\n", terminate);
 392         }
 393
 394         /* restore original input mode */
 395         CHECK(tcsetattr(fd, TCSANOW, &termios_old));
 396
 397         /* clear buffered input */
 398         CHECK(tcflush(fd, TCIFLUSH));
 399 }
 400
 401 int main(void)
 402 {
 403         printf("try out some keys to find out whether SCANCODES works\n");
 404         printf("press CTRL+C to end this test\n");
 405         printf("please note that this test only works from a console tty\n");
 406
 407         /* perform test using stdin */
 408         if (testscancodes(STDIN_FILENO) < 0)
 409                 return -1;
 410         else
 411                 return 0;
 412 }