| 1 | #include <stdio.h> |
| 2 | #include <string.h> |
| 3 | #include <sys/types.h> |
| 4 | #include <sys/stat.h> |
| 5 | #include <fcntl.h> |
| 6 | #include <sys/ioctl.h> |
| 7 | #include <unistd.h> |
| 8 | #include <linux/input.h> |
| 9 | #include <errno.h> |
| 10 | |
| 11 | #include "event.h" |
| 12 | |
| 13 | #define NUM_DEVS 8 |
| 14 | #define NUM_KEYS_DOWN 16 |
| 15 | |
| 16 | #define BIT(x) (keybits[(x)/sizeof(keybits[0])/8] & \ |
| 17 | (1 << ((x) & (sizeof(keybits[0])*8-1)))) |
| 18 | |
| 19 | static int event_fds[NUM_DEVS]; |
| 20 | static int event_fd_count = 0; |
| 21 | |
| 22 | int in_event_init(void) |
| 23 | { |
| 24 | int i; |
| 25 | |
| 26 | in_event_exit(); |
| 27 | |
| 28 | for (i = 0; event_fd_count < NUM_DEVS; i++) |
| 29 | { |
| 30 | int u, ret, fd, keybits[KEY_MAX/sizeof(int)]; |
| 31 | int support = 0, count = 0; |
| 32 | char name[64]; |
| 33 | |
| 34 | snprintf(name, sizeof(name), "/dev/input/event%d", i); |
| 35 | fd = open(name, O_RDONLY|O_NONBLOCK); |
| 36 | if (fd == -1) |
| 37 | break; |
| 38 | |
| 39 | /* check supported events */ |
| 40 | ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support); |
| 41 | if (ret == -1) { |
| 42 | printf("in_event: ioctl failed on %s\n", name); |
| 43 | goto skip; |
| 44 | } |
| 45 | |
| 46 | if (!(support & (1 << EV_KEY))) |
| 47 | goto skip; |
| 48 | |
| 49 | ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits); |
| 50 | if (ret == -1) { |
| 51 | printf("in_event: ioctl failed on %s\n", name); |
| 52 | goto skip; |
| 53 | } |
| 54 | |
| 55 | printf("%s: %08x\n", name, support); |
| 56 | |
| 57 | /* check for interesting keys */ |
| 58 | for (u = 0; u < KEY_MAX; u++) { |
| 59 | if (BIT(u) && u != KEY_POWER) |
| 60 | count++; |
| 61 | } |
| 62 | |
| 63 | if (count == 0) |
| 64 | goto skip; |
| 65 | |
| 66 | ioctl(fd, EVIOCGNAME(sizeof(name)), name); |
| 67 | printf("event: %d: using \"%s\" with %d events\n", |
| 68 | event_fd_count, name, count); |
| 69 | event_fds[event_fd_count++] = fd; |
| 70 | continue; |
| 71 | |
| 72 | skip: |
| 73 | close(fd); |
| 74 | } |
| 75 | |
| 76 | printf("event: %d devices found.\n", event_fd_count); |
| 77 | return 0; |
| 78 | } |
| 79 | |
| 80 | void in_event_exit(void) |
| 81 | { |
| 82 | for (; event_fd_count > 0; event_fd_count--) |
| 83 | close(event_fds[event_fd_count - 1]); |
| 84 | } |
| 85 | |
| 86 | int in_event_update(int binds[512]) |
| 87 | { |
| 88 | struct input_event ev[16]; |
| 89 | int d, rd, ret; |
| 90 | int result = 0; |
| 91 | |
| 92 | for (d = 0; d < event_fd_count; d++) |
| 93 | { |
| 94 | int keybits[KEY_MAX/sizeof(int)]; |
| 95 | int fd = event_fds[d]; |
| 96 | int u, changed = 0; |
| 97 | |
| 98 | while (1) { |
| 99 | rd = read(fd, ev, sizeof(ev)); |
| 100 | if (rd < (int)sizeof(ev[0])) { |
| 101 | if (errno != EAGAIN) |
| 102 | perror("event: read failed"); |
| 103 | break; |
| 104 | } |
| 105 | |
| 106 | changed = 1; |
| 107 | } |
| 108 | |
| 109 | if (!changed) |
| 110 | continue; |
| 111 | |
| 112 | ret = ioctl(fd, EVIOCGKEY(sizeof(keybits)), keybits); |
| 113 | if (ret == -1) { |
| 114 | printf("in_event: ioctl failed on %d\n", d); |
| 115 | continue; |
| 116 | } |
| 117 | |
| 118 | for (u = 0; u < KEY_MAX; u++) { |
| 119 | if (BIT(u)) { |
| 120 | printf(" %d", u); |
| 121 | result |= binds[u]; |
| 122 | } |
| 123 | } |
| 124 | printf("\n"); |
| 125 | } |
| 126 | |
| 127 | return result; |
| 128 | } |
| 129 | |
| 130 | int main() |
| 131 | { |
| 132 | in_event_init(); |
| 133 | |
| 134 | while (1) { |
| 135 | int b[512]; |
| 136 | in_event_update(b); |
| 137 | sleep(1); |
| 138 | } |
| 139 | |
| 140 | return 0; |
| 141 | } |
| 142 | |