#include <arpa/inet.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>

int main(int argc, char **argv) {
    if (argc == 2 && strcmp(argv[1], "--healthcheck") == 0) {
        alarm(5);
        int fd = socket(AF_INET, SOCK_STREAM, 0);
        if (fd < 0) return 1;
        struct sockaddr_in addr = {0};
        addr.sin_family = AF_INET;
        addr.sin_port = htons(5001);
        addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
        int result = connect(fd, (struct sockaddr *)&addr, sizeof(addr));
        close(fd);
        return result == 0 ? 0 : 1;
    }
    const char *lock = "/home/nfs_download/rsession/rtorrent.lock";
    if (unlink(lock) < 0 && errno != ENOENT) {
        perror("Cannot remove stale rtorrent lock");
        return 1;
    }
    argv[0] = "/usr/bin/rtorrent";
    execv(argv[0], argv);
    perror("Cannot start rtorrent");
    return 127;
}