1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
#include "keyboard_event.h"
/* C stdlib */
#include <stdio.h>
#include <stdint.h>
/* POSIX */
#include <unistd.h>
typedef struct {
uint32_t key;
uint32_t modifiers; /* keyboard_modkeys bitmask */
const char *action;
} global_hotkey;
#define NUM_GLOBAL_HOTKEYS 6
static global_hotkey global_hotkeys[NUM_GLOBAL_HOTKEYS] = {
{ .key = KEY_Z, .modifiers = KEYBOARD_MODKEY_ALT, .action = "show_hide" },
{ .key = KEY_F9, .modifiers = KEYBOARD_MODKEY_ALT, .action = "record" },
{ .key = KEY_F7, .modifiers = KEYBOARD_MODKEY_ALT, .action = "pause" },
{ .key = KEY_F8, .modifiers = KEYBOARD_MODKEY_ALT, .action = "stream" },
{ .key = KEY_F10, .modifiers = KEYBOARD_MODKEY_ALT | KEYBOARD_MODKEY_SHIFT, .action = "replay_start" },
{ .key = KEY_F10, .modifiers = KEYBOARD_MODKEY_ALT, .action = "replay_save" }
};
static bool on_key_callback(uint32_t key, uint32_t modifiers, int press_status, void *userdata) {
(void)userdata;
for(int i = 0; i < NUM_GLOBAL_HOTKEYS; ++i) {
if(key == global_hotkeys[i].key && modifiers == global_hotkeys[i].modifiers) {
if(press_status == 1) { /* 1 == Pressed */
puts(global_hotkeys[i].action);
fflush(stdout);
}
return false;
}
}
return true;
}
int main(void) {
const uid_t user_id = getuid();
if(geteuid() != 0) {
if(setuid(0) == -1) {
fprintf(stderr, "Error: failed to change user to root\n");
return 1;
}
}
keyboard_event keyboard_ev;
if(!keyboard_event_init(&keyboard_ev, true, true)) {
fprintf(stderr, "Error: failed to setup hotplugging and no keyboard input devices were found\n");
setuid(user_id);
return 1;
}
fprintf(stderr, "Info: global hotkeys setup, waiting for hotkeys to be pressed\n");
for(;;) {
keyboard_event_poll_events(&keyboard_ev, -1, on_key_callback, NULL);
if(keyboard_event_stdout_has_failed(&keyboard_ev)) {
fprintf(stderr, "Info: stdout closed (parent process likely closed this process), exiting...\n");
break;
}
}
keyboard_event_deinit(&keyboard_ev);
setuid(user_id);
return 0;
}
|
