| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <stdint.h> |
| #include <dirent.h> |
| #include <fcntl.h> |
| #include <sys/ioctl.h> |
| #include <sys/inotify.h> |
| #ifndef NO_ANDROID_HEADERS |
| #include <sys/limits.h> |
| #else |
| #include <limits.h> |
| #endif |
| #include <sys/poll.h> |
| #include <linux/input.h> // this does not compile |
| #include <errno.h> |
| #include <unistd.h> |
| |
| static struct pollfd *ufds; |
| static char **device_names; |
| static int nfds; |
| |
| enum { |
| PRINT_DEVICE_ERRORS = 1U << 0, |
| PRINT_DEVICE = 1U << 1, |
| PRINT_DEVICE_NAME = 1U << 2, |
| PRINT_DEVICE_INFO = 1U << 3, |
| PRINT_VERSION = 1U << 4, |
| PRINT_POSSIBLE_EVENTS = 1U << 5, |
| }; |
| |
| static int print_possible_events(int fd) |
| { |
| uint8_t *bits = NULL; |
| ssize_t bits_size = 0; |
| const char* label; |
| int i, j, k; |
| int res, res2; |
| |
| printf(" events:\n"); |
| for(i = 0; i <= EV_MAX; i++) { |
| int count = 0; |
| while(1) { |
| res = ioctl(fd, EVIOCGBIT(i, bits_size), bits); |
| if(res < bits_size) |
| break; |
| bits_size = res + 16; |
| bits = realloc(bits, bits_size * 2); |
| if(bits == NULL) { |
| fprintf(stderr, "failed to allocate buffer of size %zd\n", bits_size); |
| return 1; |
| } |
| } |
| res2 = 0; |
| switch(i) { |
| case EV_SYN: |
| label = "SYN"; |
| break; |
| case EV_KEY: |
| res2 = ioctl(fd, EVIOCGKEY(res), bits + bits_size); |
| label = "KEY"; |
| break; |
| case EV_REL: |
| label = "REL"; |
| break; |
| case EV_ABS: |
| label = "ABS"; |
| break; |
| case EV_MSC: |
| label = "MSC"; |
| break; |
| case EV_LED: |
| res2 = ioctl(fd, EVIOCGLED(res), bits + bits_size); |
| label = "LED"; |
| break; |
| case EV_SND: |
| res2 = ioctl(fd, EVIOCGSND(res), bits + bits_size); |
| label = "SND"; |
| break; |
| case EV_SW: |
| res2 = ioctl(fd, EVIOCGSW(bits_size), bits + bits_size); |
| label = "SW "; |
| break; |
| case EV_REP: |
| label = "REP"; |
| break; |
| case EV_FF: |
| label = "FF "; |
| break; |
| case EV_PWR: |
| label = "PWR"; |
| break; |
| default: |
| res2 = 0; |
| label = "???"; |
| } |
| for(j = 0; j < res; j++) { |
| for(k = 0; k < 8; k++) |
| if(bits[j] & 1 << k) { |
| char down; |
| if(j < res2 && (bits[j + bits_size] & 1 << k)) |
| down = '*'; |
| else |
| down = ' '; |
| if(count == 0) |
| printf(" %s (%04x):", label, i); |
| else if((count & 0x7) == 0 || i == EV_ABS) |
| printf("\n "); |
| printf(" %04x%c", j * 8 + k, down); |
| if(i == EV_ABS) { |
| struct input_absinfo abs; |
| if(ioctl(fd, EVIOCGABS(j * 8 + k), &abs) == 0) { |
| printf(" value %d, min %d, max %d, fuzz %d flat %d", abs.value, abs.minimum, abs.maximum, abs.fuzz, abs.flat); |
| } |
| } |
| count++; |
| } |
| } |
| if(count) |
| printf("\n"); |
| } |
| free(bits); |
| return 0; |
| } |
| |
| static int open_device(const char *device, int print_flags) |
| { |
| int version; |
| int fd; |
| struct pollfd *new_ufds; |
| char **new_device_names; |
| char name[80]; |
| char location[80]; |
| char idstr[80]; |
| struct input_id id; |
| |
| fd = open(device, O_RDWR); |
| if(fd < 0) { |
| if(print_flags & PRINT_DEVICE_ERRORS) |
| fprintf(stderr, "could not open %s, %s\n", device, strerror(errno)); |
| return -1; |
| } |
| |
| if(ioctl(fd, EVIOCGVERSION, &version)) { |
| if(print_flags & PRINT_DEVICE_ERRORS) |
| fprintf(stderr, "could not get driver version for %s, %s\n", device, strerror(errno)); |
| return -1; |
| } |
| if(ioctl(fd, EVIOCGID, &id)) { |
| if(print_flags & PRINT_DEVICE_ERRORS) |
| fprintf(stderr, "could not get driver id for %s, %s\n", device, strerror(errno)); |
| return -1; |
| } |
| name[sizeof(name) - 1] = '\0'; |
| location[sizeof(location) - 1] = '\0'; |
| idstr[sizeof(idstr) - 1] = '\0'; |
| if(ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) { |
| //fprintf(stderr, "could not get device name for %s, %s\n", device, strerror(errno)); |
| name[0] = '\0'; |
| } |
| if(ioctl(fd, EVIOCGPHYS(sizeof(location) - 1), &location) < 1) { |
| //fprintf(stderr, "could not get location for %s, %s\n", device, strerror(errno)); |
| location[0] = '\0'; |
| } |
| if(ioctl(fd, EVIOCGUNIQ(sizeof(idstr) - 1), &idstr) < 1) { |
| //fprintf(stderr, "could not get idstring for %s, %s\n", device, strerror(errno)); |
| idstr[0] = '\0'; |
| } |
| |
| new_ufds = realloc(ufds, sizeof(ufds[0]) * (nfds + 1)); |
| if(new_ufds == NULL) { |
| fprintf(stderr, "out of memory\n"); |
| return -1; |
| } |
| ufds = new_ufds; |
| new_device_names = realloc(device_names, sizeof(device_names[0]) * (nfds + 1)); |
| if(new_device_names == NULL) { |
| fprintf(stderr, "out of memory\n"); |
| return -1; |
| } |
| device_names = new_device_names; |
| |
| if(print_flags & PRINT_DEVICE) |
| printf("add device %d: %s\n", nfds, device); |
| if(print_flags & PRINT_DEVICE_INFO) |
| printf(" bus: %04x\n" |
| " vendor %04x\n" |
| " product %04x\n" |
| " version %04x\n", |
| id.bustype, id.vendor, id.product, id.version); |
| if(print_flags & PRINT_DEVICE_NAME) |
| printf(" name: \"%s\"\n", name); |
| if(print_flags & PRINT_DEVICE_INFO) |
| printf(" location: \"%s\"\n" |
| " id: \"%s\"\n", location, idstr); |
| if(print_flags & PRINT_VERSION) |
| printf(" version: %d.%d.%d\n", |
| version >> 16, (version >> 8) & 0xff, version & 0xff); |
| |
| if(print_flags & PRINT_POSSIBLE_EVENTS) { |
| print_possible_events(fd); |
| } |
| |
| ufds[nfds].fd = fd; |
| ufds[nfds].events = POLLIN; |
| device_names[nfds] = strdup(device); |
| nfds++; |
| |
| return 0; |
| } |
| |
| int close_device(const char *device, int print_flags) |
| { |
| int i; |
| for(i = 1; i < nfds; i++) { |
| if(strcmp(device_names[i], device) == 0) { |
| int count = nfds - i - 1; |
| if(print_flags & PRINT_DEVICE) |
| printf("remove device %d: %s\n", i, device); |
| free(device_names[i]); |
| memmove(device_names + i, device_names + i + 1, sizeof(device_names[0]) * count); |
| memmove(ufds + i, ufds + i + 1, sizeof(ufds[0]) * count); |
| nfds--; |
| return 0; |
| } |
| } |
| if(print_flags & PRINT_DEVICE_ERRORS) |
| fprintf(stderr, "remote device: %s not found\n", device); |
| return -1; |
| } |
| |
| static int read_notify(const char *dirname, int nfd, int print_flags) |
| { |
| int res; |
| char devname[PATH_MAX]; |
| char *filename; |
| char event_buf[512]; |
| int event_size; |
| int event_pos = 0; |
| struct inotify_event *event; |
| |
| res = read(nfd, event_buf, sizeof(event_buf)); |
| if(res < (int)sizeof(*event)) { |
| if(errno == EINTR) |
| return 0; |
| fprintf(stderr, "could not get event, %s\n", strerror(errno)); |
| return 1; |
| } |
| //printf("got %d bytes of event information\n", res); |
| |
| strcpy(devname, dirname); |
| filename = devname + strlen(devname); |
| *filename++ = '/'; |
| |
| while(res >= (int)sizeof(*event)) { |
| event = (struct inotify_event *)(event_buf + event_pos); |
| //printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : ""); |
| if(event->len) { |
| strcpy(filename, event->name); |
| if(event->mask & IN_CREATE) { |
| open_device(devname, print_flags); |
| } |
| else { |
| close_device(devname, print_flags); |
| } |
| } |
| event_size = sizeof(*event) + event->len; |
| res -= event_size; |
| event_pos += event_size; |
| } |
| return 0; |
| } |
| |
| static int scan_dir(const char *dirname, int print_flags) |
| { |
| char devname[PATH_MAX]; |
| char *filename; |
| DIR *dir; |
| struct dirent *de; |
| dir = opendir(dirname); |
| if(dir == NULL) |
| return -1; |
| strcpy(devname, dirname); |
| filename = devname + strlen(devname); |
| *filename++ = '/'; |
| while((de = readdir(dir))) { |
| if(de->d_name[0] == '.' && |
| (de->d_name[1] == '\0' || |
| (de->d_name[1] == '.' && de->d_name[2] == '\0'))) |
| continue; |
| strcpy(filename, de->d_name); |
| open_device(devname, print_flags); |
| } |
| closedir(dir); |
| return 0; |
| } |
| |
| static void usage(int argc, char *argv[]) |
| { |
| fprintf(stderr, "Usage: %s [-t] [-n] [-s switchmask] [-S] [-v [mask]] [-p] [-q] [-c count] [-r] [device]\n", argv[0]); |
| fprintf(stderr, " -t: show time stamps\n"); |
| fprintf(stderr, " -n: don't print newlines\n"); |
| fprintf(stderr, " -s: print switch states for given bits\n"); |
| fprintf(stderr, " -S: print all switch states\n"); |
| fprintf(stderr, " -v: verbosity mask (errs=1, dev=2, name=4, info=8, vers=16, pos. events=32)\n"); |
| fprintf(stderr, " -p: show possible events (errs, dev, name, pos. events)\n"); |
| fprintf(stderr, " -q: quiet (clear verbosity mask)\n"); |
| fprintf(stderr, " -c: print given number of events then exit\n"); |
| fprintf(stderr, " -r: print rate events are received\n"); |
| } |
| |
| int getevent_main(int argc, char *argv[]) |
| { |
| int c; |
| int i; |
| int res; |
| int pollres; |
| int get_time = 0; |
| int print_device = 0; |
| char *newline = "\n"; |
| uint16_t get_switch = 0; |
| struct input_event event; |
| int version; |
| int print_flags = PRINT_DEVICE_ERRORS | PRINT_DEVICE | PRINT_DEVICE_NAME; |
| int print_flags_set = 0; |
| int dont_block = -1; |
| int event_count = 0; |
| int sync_rate = 0; |
| int64_t last_sync_time = 0; |
| const char *device = NULL; |
| const char *device_path = "/dev/input"; |
| |
| opterr = 0; |
| do { |
| c = getopt(argc, argv, "tns:Sv::pqc:rh"); |
| if (c == EOF) |
| break; |
| switch (c) { |
| case 't': |
| get_time = 1; |
| break; |
| case 'n': |
| newline = ""; |
| break; |
| case 's': |
| get_switch = strtoul(optarg, NULL, 0); |
| if(dont_block == -1) |
| dont_block = 1; |
| break; |
| case 'S': |
| get_switch = ~0; |
| if(dont_block == -1) |
| dont_block = 1; |
| break; |
| case 'v': |
| if(optarg) |
| print_flags = strtoul(optarg, NULL, 0); |
| else |
| print_flags |= PRINT_DEVICE | PRINT_DEVICE_NAME | PRINT_DEVICE_INFO | PRINT_VERSION; |
| print_flags_set = 1; |
| break; |
| case 'p': |
| print_flags = PRINT_DEVICE_ERRORS | PRINT_DEVICE | PRINT_DEVICE_NAME | PRINT_POSSIBLE_EVENTS; |
| print_flags_set = 1; |
| if(dont_block == -1) |
| dont_block = 1; |
| break; |
| case 'q': |
| print_flags = 0; |
| print_flags_set = 1; |
| break; |
| case 'c': |
| event_count = atoi(optarg); |
| dont_block = 0; |
| break; |
| case 'r': |
| sync_rate = 1; |
| break; |
| case '?': |
| fprintf(stderr, "%s: invalid option -%c\n", |
| argv[0], optopt); |
| case 'h': |
| usage(argc, argv); |
| exit(1); |
| } |
| } while (1); |
| if(dont_block == -1) |
| dont_block = 0; |
| |
| if (optind + 1 == argc) { |
| device = argv[optind]; |
| optind++; |
| } |
| if (optind != argc) { |
| usage(argc, argv); |
| exit(1); |
| } |
| nfds = 1; |
| ufds = calloc(1, sizeof(ufds[0])); |
| ufds[0].fd = inotify_init(); |
| ufds[0].events = POLLIN; |
| if(device) { |
| if(!print_flags_set) |
| print_flags = PRINT_DEVICE_ERRORS; |
| res = open_device(device, print_flags); |
| if(res < 0) { |
| return 1; |
| } |
| } |
| else { |
| print_device = 1; |
| res = inotify_add_watch(ufds[0].fd, device_path, IN_DELETE | IN_CREATE); |
| if(res < 0) { |
| fprintf(stderr, "could not add watch for %s, %s\n", device_path, strerror(errno)); |
| return 1; |
| } |
| res = scan_dir(device_path, print_flags); |
| if(res < 0) { |
| fprintf(stderr, "scan dir failed for %s\n", device_path); |
| return 1; |
| } |
| } |
| |
| if(get_switch) { |
| for(i = 1; i < nfds; i++) { |
| uint16_t sw; |
| res = ioctl(ufds[i].fd, EVIOCGSW(1), &sw); |
| if(res < 0) { |
| fprintf(stderr, "could not get switch state, %s\n", strerror(errno)); |
| return 1; |
| } |
| sw &= get_switch; |
| printf("%04x%s", sw, newline); |
| } |
| } |
| |
| if(dont_block) |
| return 0; |
| |
| while(1) { |
| pollres = poll(ufds, nfds, -1); |
| //printf("poll %d, returned %d\n", nfds, pollres); |
| if(ufds[0].revents & POLLIN) { |
| read_notify(device_path, ufds[0].fd, print_flags); |
| } |
| for(i = 1; i < nfds; i++) { |
| if(ufds[i].revents) { |
| if(ufds[i].revents & POLLIN) { |
| res = read(ufds[i].fd, &event, sizeof(event)); |
| if(res < (int)sizeof(event)) { |
| fprintf(stderr, "could not get event\n"); |
| return 1; |
| } |
| if(get_time) { |
| printf("%ld-%ld: ", event.time.tv_sec, event.time.tv_usec); |
| } |
| if(print_device) |
| printf("%s: ", device_names[i]); |
| printf("%04x %04x %08x", event.type, event.code, event.value); |
| if(sync_rate && event.type == 0 && event.code == 0) { |
| int64_t now = event.time.tv_sec * 1000000LL + event.time.tv_usec; |
| if(last_sync_time) |
| printf(" rate %lld", 1000000LL / (now - last_sync_time)); |
| last_sync_time = now; |
| } |
| printf("%s", newline); |
| if(event_count && --event_count == 0) |
| return 0; |
| } |
| } |
| } |
| } |
| |
| return 0; |
| } |