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