"Symbol referencing errors" On Socket programming Post: 302526752

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Top Forums Programming "Symbol referencing errors" On Socket programming Post 302526752 by beyondaymk on Wednesday 1st of June 2011 11:37:33 AM

06-01-2011

Registered User

"Symbol referencing errors" On Socket programming

Dear all,

I had the "Symbol referencing errors" while compiling a C socket code.
It said "Undefined Symbol: socketpair", but I already copy the two head files (#include "types.h", #include "socket.h") into my current directory.

Could anyone help me with it? Thanks.

By the way, I'm using Solaris, OS version is 5.10.
GCC version is 3.4.6.(is it because the GCC version is old?)
The tut2.c code I was using is from the following link:
A Socket-based IPC Tutorial

I'll copy the source code here:

Code:

#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h> 
#include <unistd.h>
#include <stdlib.h>

#define DATA1 "In Xanadu, did Kublai Khan..." 
#define DATA2 "A stately pleasure dome decree..."

/*
 * This program creates a pair of connected sockets, 
 * then forks and communicates over them. While this
 * is very similar to communication with pipes, socketpairs
 * are two-way communications objects. Therefore, I can
 * send messages in both directions.
 */

main()
{
        int sockets[2], child;
        char buf[1024];

        if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockets) < 0) {
                perror("opening stream socket pair");
                exit(1);
        }

        if ((child = fork()) == -1)
                perror("fork");
        else if (child) {       /* This is the parent. */
                close(sockets[0]);
                if (read(sockets[1], buf, sizeof(buf)) < 0)
                        perror("reading stream message");
                printf("-->%s\n", buf);
                if (write(sockets[1], DATA2, sizeof(DATA2)) < 0)
                        perror("writing stream message");
                close(sockets[1]);
        } else {                /* This is the child. */
                close(sockets[1]);
                if (write(sockets[0], DATA1, sizeof(DATA1)) < 0)
                        perror("writing stream message");
                if (read(sockets[0], buf, sizeof(buf)) < 0) 
                        perror("reading stream message");
                printf("-->%s\n", buf);
                close(sockets[0]);
        }
}

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