Using TCP Through Sockets

{
va_list ap;
}
fprintf (stderr, "fatal: ");
va_start (ap, msg);
vfprintf (stderr, msg, ap);
va_end (ap);
exit (1);
4.5 multifinger.c: A mostly 5 asynchronous finger client
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "async.h"
#define FINGER_PORT 79
#define MAX_RESP_SIZE 16384
struct fcon {
int fd;
char *host; /* Host to which we are connecting */
char *user; /* User to finger on that host */
int user_len; /* Lenght of the user string */
int user_pos; /* Number bytes of user already written to network */
void *resp; /* Finger response read from network */
int resp_len; /* Number of allocated bytes resp points to */
int resp_pos; /* Number of resp bytes used so far */
};
int ncon; /* Number of open TCP connections */
static void
fcon_free (struct fcon *fc)
{
if (fc->fd >= 0) {
cb_free (fc->fd, 0);
cb_free (fc->fd, 1);
close (fc->fd);
ncon--;
}
5 gethostbyname performs synchronous socket I/O.
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