You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
1.6 KiB
68 lines
1.6 KiB
5 years ago
|
#include <stdlib.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <dirent.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <linux/input.h>
|
||
|
|
|
||
|
|
#define test_bit(yalv, abs_b) ((((char *)abs_b)[yalv/8] & (1<<yalv%8)) > 0)
|
||
|
|
|
||
|
|
const char ev_root[] = "/dev/input/";
|
||
|
|
|
||
|
|
int main (void)
|
||
|
|
{
|
||
|
|
/* Open the event directory */
|
||
|
|
DIR *ev_dir = opendir(ev_root);
|
||
|
|
if (!ev_dir)
|
||
|
|
exit(-1);
|
||
|
|
|
||
|
|
for (;;) {
|
||
|
|
struct dirent *file_ent;
|
||
|
|
char ev_path[sizeof(ev_root) + NAME_MAX + 1];
|
||
|
|
int tmp_fd;
|
||
|
|
unsigned char evtype_b[EV_MAX];
|
||
|
|
|
||
|
|
if ((file_ent = readdir(ev_dir)) == NULL)
|
||
|
|
break;
|
||
|
|
/* Filter out non character devices */
|
||
|
|
if (file_ent->d_type != DT_CHR)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
/* Compose absolute path from relative */
|
||
|
|
memset(ev_path, 0, sizeof(ev_path));
|
||
|
|
strncpy(ev_path, ev_root, sizeof(ev_root) + NAME_MAX);
|
||
|
|
strncat(ev_path, file_ent->d_name, sizeof(ev_root) + NAME_MAX);
|
||
|
|
fprintf(stderr, "%s\n", ev_path);
|
||
|
|
|
||
|
|
/* Open device and check if it can give key events otherwise ignore it */
|
||
|
|
tmp_fd = open(ev_path, O_RDONLY | O_NONBLOCK);
|
||
|
|
if (tmp_fd < 0) {
|
||
|
|
fprintf(stdout, "Could not open device %s\n", ev_path);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
fprintf(stderr, "%s\n", ev_path);
|
||
|
|
|
||
|
|
memset(evtype_b, 0, sizeof(evtype_b));
|
||
|
|
if (ioctl(tmp_fd, EVIOCGBIT(0, EV_MAX), evtype_b) < 0) {
|
||
|
|
fprintf(stdout, "Could not read capabilities of device %s\n",
|
||
|
|
ev_path);
|
||
|
|
close(tmp_fd);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
fprintf(stderr, "%s\n", ev_path);
|
||
|
|
|
||
|
|
if (test_bit(EV_KEY, evtype_b))
|
||
|
|
fprintf(stdout, "device %s has it!\n", ev_path);
|
||
|
|
|
||
|
|
|
||
|
|
fprintf(stdout, "\n\n\n\n");
|
||
|
|
close(tmp_fd);
|
||
|
|
}
|
||
|
|
|
||
|
|
printf("%d", EV_MAX);
|
||
|
|
closedir(ev_dir);
|
||
|
|
}
|