138 lines
4.2 KiB
C
138 lines
4.2 KiB
C
// https://stackoverflow.com/questions/20943322/accessing-keys-from-linux-input-device
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#include <stdlib.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 <linux/input.h>
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#include <string.h>
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#include <stdio.h>
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static const char *const evval[3] = {
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"RELEASED",
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"PRESSED ",
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"REPEATED"
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};
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/**
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* +--+--+--+--+
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* |30|48|46|32|
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* +--+--+--+--+
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* |18|33|34|35|
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* +--+--+--+--+
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* |23|36|37|38|
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* +--+--+--+--+
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* |50|49|24|25|
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* +--+--+--+--+
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* |16|19|31|20|
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* +--+--+--+--+
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* */
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enum p_key {
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p11 = 30,
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p12 = 48,
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p13 = 46,
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p14 = 32,
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p21 = 18,
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p22 = 33,
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p23 = 34,
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p24 = 35,
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p31 = 23,
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p32 = 36,
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p33 = 37,
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p34 = 38,
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p41 = 50,
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p42 = 49,
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p43 = 24,
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p44 = 25,
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p51 = 16,
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p52 = 19,
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p53 = 31,
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p54 = 20
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};
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int main(void)
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{
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const char* dev = "/dev/input/by-id/usb-MAX_Falcon_20_RGB-if02-event-kbd"; //at.event26
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struct input_event ev;
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ssize_t n;
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int fd;
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fd = open(dev, O_RDONLY);
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if (fd == -1) {
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fprintf(stderr, "Cannot open %s: %s.\n", dev, strerror(errno));
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return EXIT_FAILURE;
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}
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// This grabs the device, so the we do not just listen to events but we actually consume them! This way the keypresses are not handled by any other handler!
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// https://stackoverflow.com/questions/29942421/read-barcodes-from-input-event-linux-c/29956584#29956584
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if (ioctl(fd, EVIOCGRAB, 1)) {
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const int saved_errno = errno;
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close(fd);
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return errno = (saved_errno) ? errno : EACCES;
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}
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// Main-Loop
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while (1) {
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n = read(fd, &ev, sizeof ev);
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//n = ioctl(fd, EVIOCGRAB, 1);
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if (n == (ssize_t)-1) {
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if (errno == EINTR)
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continue;
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else
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break;
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} else
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if (n != sizeof ev) {
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errno = EIO;
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break;
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}
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if (ev.type == EV_KEY && ev.value >= 0 && ev.value <= 2) {
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//printf("%s 0x%04x (%d)\n", evval[ev.value], (int)ev.code, (int)ev.code);
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if (evval[ev.value] == "RELEASED") {
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switch((int)ev.code) {
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case p11:
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system("notify-send 'Screenlayout: default'; /home/tbehrendt/.screenlayout/default.sh");
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break;
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case p12:
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system("notify-send 'Screenlayout: main low res'; /home/tbehrendt/.screenlayout/main_low_res.sh");
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break;
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case p13:
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system("notify-send 'Screenlayout: tv mirror'; /home/tbehrendt/.screenlayout/tv_mirror.sh");
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break;
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case p14:
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system("notify-send 'Screenlayout: tv standalone'; /home/tbehrendt/.screenlayout/tv_standalone.sh");
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break;
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case p21: printf("p21\n"); break;
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case p22: printf("p22\n"); break;
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case p23: printf("p23\n"); break;
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case p24: printf("p24\n"); break;
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case p31: printf("p31\n"); break;
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case p32: printf("p32\n"); break;
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case p33: printf("p33\n"); break;
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case p34: printf("p34\n"); break;
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case p41: printf("p41\n"); break;
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case p42: printf("p42\n"); break;
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case p43: printf("p43\n"); break;
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case p44: printf("p44\n"); break;
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case p51:
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system("notify-send mute toggled;pactl set-sink-mute @DEFAULT_SINK@ toggle");
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break;
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case p52:
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system("notify-send 'VOL +5%'; pactl set-sink-volume @DEFAULT_SINK@ +5%");
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break;
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case p53:
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system("notify-send 'VOL -5%'; pactl set-sink-volume @DEFAULT_SINK@ -5%");
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break;
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case p54:
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system("/home/tbehrendt/.scripts/makroboard/p51.sh &");
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break;
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}
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}
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}
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}
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fflush(stdout);
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fprintf(stderr, "%s.\n", strerror(errno));
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return EXIT_FAILURE;
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}
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