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#include "curfblib.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include "lwarnlib.h"
#include <unistd.h>
#include <fcntl.h>
#define PID_FILE "/tmp/cursorfb.pid"
/* ---------- STOP DAEMON ---------- */
static void stop_daemon() {
FILE *f = fopen(PID_FILE, "r");
if (!f) {
printf("cursorfb not running\n");
return;
}
int pid;
fscanf(f, "%d", &pid);
fclose(f);
if (kill(pid, SIGTERM) == 0) {
printf("cursorfb stopped (pid %d)\n", pid);
unlink(PID_FILE);
} else {
printf("failed to stop cursorfb\n");
}
}
/* ---------- DAEMONIZE ---------- */
static void daemonize() {
pid_t pid = fork();
if (pid < 0) exit(1);
if (pid > 0) exit(0);
setsid();
pid = fork();
if (pid > 0) exit(0);
FILE *f = fopen(PID_FILE, "w");
if (f) {
fprintf(f, "%d", getpid());
fclose(f);
}
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
}
/* ---------- MAIN ---------- */
int main(int argc, char **argv) {
if (geteuid() != 0) {
fprintf(stderr, "cursorfb: restarting with sudo...\n");
char **args = malloc(sizeof(char*) * (argc + 3));
args[0] = "sudo";
args[1] = "-E";
for (int i = 0; i < argc; i++) {
args[i + 2] = argv[i];
}
args[argc + 2] = NULL;
execvp("sudo", args);
perror("cursorfb: failed to run sudo");
return 1;
}
if (argc > 1 && strcmp(argv[1], "--clear") == 0) {
if (curfb_init() != 0)
return 1;
curfb_clear();
curfb_shutdown();
return 0;
}
if (argc > 1 && strcmp(argv[1], "--stop") == 0) {
stop_daemon();
return 0;
}
if (argc > 1 && strcmp(argv[1], "--help") == 0) {
printf("usage: cursorfb [options]\n");
printf("options:\n");
printf(" --stop stop daemon\n");
printf(" --help show help\n");
printf(" --clear clear cursor\n");
printf(" to start, just run with no options\n");
return 0;
}
/* DEFAULT: start daemon */
daemonize();
if (curfb_init() != 0) {
fbwarn("initialization failed");
return 1;
}
curfb_loop();
curfb_shutdown();
unlink(PID_FILE);
return 0;
}
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