Thread: Linux/Unix time server

Hey, I just bought a book to teach myself how to program Linux/Unix sockets. The first exercise is to take the time server from the book as is, and code it on my box. Now the problem is that when I compile and "TRY" to run the program it give this error: ~/Documents$ gcc time_server.c -o time
time_server.c:1:17: fatal error: unp.h: No such file or directory
compilation terminated.

Here is the code=>

Code:

#include <unp.h>

int main(int argc, char **argv)
{
    int sockfd, n;
    char recvline[MAXLINE +1];
    struct sockaddr_in servaddr;

    if (argc != 2)
        err_quit("Usage: a.out <IPaddress>");

    if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
        err_sys("Socket error");

    bzero(&servaddr, sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(13);
    if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0)
        err_quit("inet_pton error for %s", argv[1]);

    if(connect(sockfd, (SA *)&servaddr, sizeof(servaddr)) < 0)
        err_sys("Connect error");

    while( (n = read(sockfd, recvline, MAXLINE)) > 0) {
    recvline[n] = 0;
    if (fputs(recvline, stdout) == EOF)
        err_sys("fputs error");
    }
    if (n < 0)
        err_sys("read error");
    exit(1);
}

Why won't it compile? Maybe the header is wrong. Maybe I do not have the required libraries downloaded...Any help will be appreciated!

Originally Posted by Annonymous

wow everyone here has been a great help lol

Probably because no one here has heard of unp.h. A quick google search tells us why. unp.h is a custom header file written by the author of the book.

Next time, instead of waiting 2 days for someone to answer your question for you, maybe you should spend 10 seconds searching google first.