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  1.  
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4. #include <sys/types.h>
  5. #include <sys/stat.h>
  6. #include <unistd.h>
  7. #include <sys/ioctl.h>
  8. #include <fcntl.h>
  9. #include <errno.h>
  10. #include <sys/time.h>
  11. #include "linux/input.h"
  13. int stop = 0;
  15. const char * button2name (const int button) {
  16. static char buffer [256];
  17. if (button >= BTN_MOUSE && button < BTN_JOYSTICK)
  18. snprintf (buffer, 256, "Mouse button %d", button - BTN_MOUSE + 1);
  19. else
  20. snprintf (buffer, 256, "unknown button %d (0x%x)", button, button);
  21. return buffer;
  22. }
  24. const char * axis2name (const int axis) {
  25. const char * names[10] = { "X-Axis", "Y-Axis", "Z-Axis", "RX-Axis", "RY-Axis", "RZ-Axis", "HWheel",
  26. "Dial", "Wheel", "Misc" };
  27. if (axis < 0 || axis > 9) return "unknown";
  28. else return names[axis];
  29. }
  31. const char * bus2name (const int bus) {
  32. const char * names[] = { NULL, "PCI", "ISPNP", "USB", "HIL", "BLUETOOTH", NULL, NULL,
  33. NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
  34. "ISA", "8042", "XTKBD", "RS232", "GAMEPORT", "PARPORT", "AMIGA", "ADB",
  35. "I2C", "HOST", "GSC" };
  37. if (bus < 1 || bus > 0x1A || (bus > 5 && bus < 0x10)) return "unknown";
  38. else return names[bus];
  39. }
  41. int run_evdev (char * name) {
  42. int fd;
  43. int result;
  44. struct input_id id;
  45. struct input_event event;
  46. int version;
  47. char devicename [256], devicephys[256];
  49. fd = open (name, O_RDONLY);
  50. if (fd == -1) { perror ("open()"); return 1; }
  51. if (ioctl (fd, EVIOCGVERSION, &version)) { perror ("ioctl(EVIOCGVERSION)"); return 1; }
  52. printf ("Event Interface version %d.%d.%d\n", (version >> 16) & 255, (version >> 8) & 255, version & 255);
  53. if ((result = ioctl (fd, EVIOCGNAME(256), &devicename)) < 0) { perror ("ioctl(EVIOCGNAME)"); return 1; }
  54. printf ("Running on %s\n", devicename);
  55. if ((result = ioctl (fd, EVIOCGPHYS(256), &devicephys)) < 0) { perror ("ioctl(EVIOCGPHYS)"); return 1; }
  56. printf ("Connected at %s\n", devicephys);
  57. if ((result = ioctl (fd, EVIOCGID, &id)) < 0) { perror ("ioctl(EVIOCGID)"); return 1; }
  58. printf ("Connected to %s\n", bus2name (id.bustype));
  60. while (!stop) {
  61. result = read (fd, &event, sizeof (event));
  62. if (result != sizeof (event)) stop = 1;
  63. else {
  64. switch (event.type) {
  65. case EV_SYN:
  66. // printf ("Synchronisation event\n");
  67. break;
  68. case EV_KEY:
  69. printf ("Key %s event on %s\n", event.value ? "press" : "release", button2name (event.code));
  70. break;
  71. case EV_REL:
  72. printf ("Relative movement event on %s\n", axis2name (event.code));
  73. break;
  74. case EV_ABS:
  75. printf ("Absolute movement event\n");
  76. break;
  77. case EV_MSC:
  78. printf ("Miscellaneous event\n");
  79. break;
  80. case EV_SW:
  81. printf ("Switch event: ");
  82. switch (event.code) {
  83. case SW_LID:
  84. printf ("Lid %s\n", event.value ? "closed" : "opened");
  85. break;
  86. default:
  87. printf ("Unknown switch %d, state %d\n", event.code, event.value);
  88. }
  89. break;
  90. default:
  91. printf ("Unused event type %d\n", event.type);
  92. }
  93. }
  94. }
  97. close (fd);
  98. return 0;
  99. }
  101. int main (int argc, char ** argv) {
  102. struct stat statbuf;
  104. if (argc != 2) return 1;
  105. if (stat (argv[1], &statbuf)) return 1;
  106. if (!S_ISCHR (statbuf.st_mode)) return 1;
  108. return run_evdev (argv[1]);
  109. }
  110.  
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