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#include "keyboard_event.h"
/* C stdlib */
#include <stdio.h>
#include <string.h>
#include <locale.h>
/* POSIX */
#include <unistd.h>
static void usage(void) {
fprintf(stderr, "usage: gsr-global-hotkeys [--all|--virtual]\n");
fprintf(stderr, "OPTIONS:\n");
fprintf(stderr, " --all Grab all devices.\n");
fprintf(stderr, " --virtual Grab all virtual devices only.\n");
}
static bool is_gsr_global_hotkeys_already_running(void) {
FILE *f = fopen("/proc/bus/input/devices", "rb");
if(!f)
return false;
bool virtual_keyboard_running = false;
char line[1024];
while(fgets(line, sizeof(line), f)) {
if(strstr(line, "gsr-ui virtual keyboard")) {
virtual_keyboard_running = true;
break;
}
}
fclose(f);
return virtual_keyboard_running;
}
int main(int argc, char **argv) {
setlocale(LC_ALL, "C"); /* Sigh... stupid C */
keyboard_grab_type grab_type = KEYBOARD_GRAB_TYPE_ALL;
if(argc == 2) {
const char *grab_type_arg = argv[1];
if(strcmp(grab_type_arg, "--all") == 0) {
grab_type = KEYBOARD_GRAB_TYPE_ALL;
} else if(strcmp(grab_type_arg, "--virtual") == 0) {
grab_type = KEYBOARD_GRAB_TYPE_VIRTUAL;
} else {
fprintf(stderr, "Error: expected --all or --virtual, got %s\n", grab_type_arg);
usage();
return 1;
}
} else if(argc != 1) {
fprintf(stderr, "Error: expected 0 or 1 arguments, got %d argument(s)\n", argc);
usage();
return 1;
}
if(is_gsr_global_hotkeys_already_running()) {
fprintf(stderr, "Error: gsr-global-hotkeys is already running\n");
return 1;
}
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, grab_type)) {
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);
if(keyboard_event_stdin_has_failed(&keyboard_ev)) {
fprintf(stderr, "Info: stdin closed (parent process likely closed this process), exiting...\n");
break;
}
}
keyboard_event_deinit(&keyboard_ev);
setuid(user_id);
return 0;
}
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