146 lines
3.7 KiB
C
146 lines
3.7 KiB
C
#include <stdio.h>
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#include <signal.h>
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#include <unistd.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <termios.h>
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#include "input_dev.h"
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#include <dirent.h>
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#include <stdio.h>
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static const char *input_path = "/dev/input/";
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static struct libevdev* ev_matches(const char* sysfs_entry, const uinput_filters_t* const filters) {
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struct libevdev *dev = NULL;
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int fd = open(sysfs_entry, O_RDWR);
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if (fd < 0) {
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fprintf(stderr, "Cannot open %s, device skipped.\n", sysfs_entry);
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return NULL;
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}
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if (libevdev_new_from_fd(fd, &dev) != 0) {
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fprintf(stderr, "Cannot initialize libevdev from this device (%s): skipping.\n", sysfs_entry);
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return NULL;
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}
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if (strcmp(libevdev_get_name(dev), filters->name) != 0) {
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return NULL;
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}
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if (libevdev_grab(dev, LIBEVDEV_GRAB) != 0) {
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fprintf(stderr, "Unable to grab the device: skipping.\n");
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return NULL;
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}
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return 0;
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}
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static pthread_mutex_t input_acquire_mutex = PTHREAD_MUTEX_INITIALIZER;
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void *input_dev_thread_func(void *ptr) {
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input_dev_t *in_dev = (input_dev_t*)ptr;
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struct libevdev* dev = NULL;
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for (;;) {
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const uint32_t flags = in_dev->crtl_flags;
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if (flags & INPUT_DEV_CTRL_FLAG_EXIT) {
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in_dev->crtl_flags &= ~INPUT_DEV_CTRL_FLAG_EXIT;
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break;
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}
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// clean up from previous iteration
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if (dev != NULL) {
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libevdev_free(dev);
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dev = NULL;
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}
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const int input_acquire_lock_result = pthread_mutex_lock(&input_acquire_mutex);
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if (input_acquire_lock_result != 0) {
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fprintf(stderr, "Cannot lock input mutex: %d, will retry later...\n", input_acquire_lock_result);
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usleep(250000);
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continue;
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}
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char path[512] = "\0";
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DIR *d;
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struct dirent *dir;
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d = opendir(input_path);
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if (d) {
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while ((dir = readdir(d)) != NULL) {
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if (dir->d_name[0] == '.') {
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continue;
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} else if (dir->d_name[0] == 'b') { // by-id
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continue;
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} else if (dir->d_name[0] == 'j') { // js-0
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continue;
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}
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sprintf(path, "%s%s", input_path, dir->d_name);
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if (ev_matches(path, in_dev->ev_filters) != NULL) {
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printf("Opened device %s\n name: %s", path, libevdev_get_name(dev));
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break;
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}
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}
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closedir(d);
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}
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pthread_mutex_unlock(&input_acquire_mutex);
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if (dev == NULL) {
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usleep(250000);
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continue;
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}
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for (;;) {
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// TODO: do the required
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//process_events(dev);
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const uint32_t flags = in_dev->crtl_flags;
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if (flags & INPUT_DEV_CTRL_FLAG_EXIT) {
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break;
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}
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}
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}
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return NULL;
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}
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int open_and_hide_input() {
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int fd = -1;
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char buf[256];
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fd = open("/dev/input/event3", O_RDONLY);
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if (fd == -1) {
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perror("open_port: Unable to open /dev/ttyAMA0 - ");
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return(-1);
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}
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// Turn off blocking for reads, use (fd, F_SETFL, FNDELAY) if you want that
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//fcntl(fd, F_SETFL, 0);
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while(1){
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int n = read(fd, (void*)buf, 255);
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if (n < 0) {
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perror("Read failed - ");
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return -1;
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} else if (n == 0) {
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printf("No data on port\n");
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} else {
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buf[n] = '\0';
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printf("%i bytes read : %s", n, buf);
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}
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sleep(1);
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printf("i'm still doing something");
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}
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close(fd);
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return fd;
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}
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