int main()
{
int a = 4, b = 5;
int (*funcptr)(int, int) = func0;
int c = func0(a, b);
printf("%s: c = %d\n", __FUNCTION__, c);
printf("funcptr's name = %s\n", addr_to_name((unsigned long)funcptr));
return 0;
}
/*
* u_accept
* Wait for a from a host on a specified port.
*
* parameters:
* fd = file descriptor previously bound to listening port
* hostn = name of host to listen for
* hostnsize = size of hostn buffer
* returns: communication file descriptor or -1 on error
*
* comments: This function is used by the server to wait for a
* communication. It blocks until a remote request is received
* from the port bound to the given file descriptor.
* hostn is filled with an ASCII string containing the remote
* host name. It must point to a buffer of size at least hostnsize.
* If the name does not fit, as much of the name as is possible is put
* into the buffer.
* If hostn is NULL or hostnsize <= 0, no hostname is copied.
*/
int u_accept(int fd, char *hostn, int hostnsize)
{
int len = sizeof(struct sockaddr);
struct sockaddr_in net_client;
int retval;
while ( ((retval =
accept(fd, (struct sockaddr *)(&net_client), &len)) == -1) &&
(errno == EINTR) )
;
if ( (retval == -1) || (hostn == NULL) || (hostnsize <= 0) )
return retval;
addr_to_name(net_client.sin_addr,hostn,hostnsize);
return retval;
}
