/*
 * Copyright (c) Camden Dixie O'Brien
 * SPDX-License-Identifier: AGPL-3.0-only
 */

#define _POSIX_C_SOURCE 199309L

#include <dlfcn.h>
#include <stdio.h>
#include <time.h>

typedef const char *(*getmsg_t)(void);

int main(void)
{
	const char *libfn = "libmod.so";
	const char *symn = "getmsg";
	void *mod = NULL;
	getmsg_t getmsg = NULL;
	const struct timespec pause = { .tv_nsec = 100000000 };
	while (1) {
		if (mod)
			dlclose(mod);
		mod = dlopen(libfn, RTLD_NOW);
		if (!mod) {
			fprintf(
			    stderr, "Error: couldn't open %s: %s\n", libfn, dlerror());
			return 1;
		}
		getmsg = (getmsg_t)dlsym(mod, symn);
		if (!getmsg) {
			fprintf(
			    stderr, "Error: couldn't find symbol %s: %s\n", symn,
			    dlerror());
			return 1;
		}
		printf("\33[2K\r%s", getmsg());
		fflush(stdout);
		nanosleep(&pause, NULL);
	}
	return 0;
}