55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <linux/input.h>
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int read_tristate() {
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int fd = open("/proc/tristatekey/tri_state", O_RDONLY);
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char p[16];
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int ret = read(fd, p, sizeof(p) - 1);
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p[ret] = 0;
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return atoi(p);
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}
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int main() {
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int fd = -1;
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for(int i=0; i<255; i++) {
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char path[256];
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snprintf(path, 256, "/dev/input/event%d", i);
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fd = open(path, O_RDWR);
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if(fd == -1) continue;
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char name[256];
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ioctl(fd, EVIOCGNAME(256), name);
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printf("Got input name %s\n", name);
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if(strcmp(name, "oplus,hall_tri_state_key") == 0) {
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break;
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}
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close(fd);
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fd = -1;
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}
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if(fd == -1) return 0;
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ioctl(fd, EVIOCGRAB, 1);
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struct input_event ev;
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while(read(fd, &ev, sizeof(ev)) != 0) {
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if(!(ev.code == 61 && ev.value == 0)) continue;
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int state = read_tristate();
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if(state == 1) {
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}
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printf("State %d\n", read_tristate());
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if(state == 1) {
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system("service call audio 31 i32 2 s16 android");
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} else if(state == 2) {
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system("service call audio 31 i32 1 s16 android");
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} else if(state == 3) {
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system("service call audio 31 i32 0 s16 android");
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}
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}
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}
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