create non blocking socket

conn.c

#include "conn.h"

int
_set_non_blocking(int s) {
    int x;
    x = fcntl(s,F_GETFL,0);
    fcntl(s,F_SETFL,x | O_NONBLOCK);
    return s;
}

int
create_socket(int port) {
    int listenfd;
    struct sockaddr_in servaddr;
    listenfd = socket(AF_INET, SOCK_STREAM, 0);
    memset(&servaddr, 0, sizeof(servaddr));

    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
    servaddr.sin_port   = htons(port);
    
    bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr));
    listen(listenfd, 5);
    _set_non_blocking(listenfd);

    return listenfd;
}

/*
int main(int argc, char const *argv[])
{
    int fd = create_socket(8889);
    _log_err("fd: %d", fd);
    return 0;
}*/