This is about as much as I can cut it down:
/***************************************************************************************/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
int main()
{
/* variable declarations */
int connfd, listenfd, flags;
socklen_t clilen;
struct sockaddr *cliaddr;
struct sockaddr_in mysock;
/* Create socket file descriptor */
listenfd = socket(AF_INET, SOCK_STREAM, 0);
/* Set up socket details */
bzero(&mysock, sizeof(mysock));
mysock.sin_family = AF_INET;
mysock.sin_addr.s_addr = htonl(INADDR_ANY);
mysock.sin_port = htons(12201);
/* Bind file descriptor to our socket */
bind(listenfd, (struct sockaddr *) &mysock, sizeof(mysock));
/* And make our socket listen for incomming conncetions */
listen(listenfd, 20);
/* Set our listen socket blocking */
flags = fcntl(listenfd, F_GETFL, 0);
flags = flags & ~FNDELAY; /* Turn blocking on */
fcntl(listenfd, F_SETFL, flags);
/* Infinite loop waiting for connections */
for(;;)
{
connfd = accept(listenfd, (struct sockaddr *) cliaddr, &clilen);
printf("If it were blocking, we shouldn't get here!\n");
/* Here would be a pthread_create to handle the incomming connection */
}
return 0;
}
/***************************************************************************************/
The main point to focus on is the accept within the infinite for loop,
and the fact that it gets past that and prints out the message
continuously
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