help to understand this code

cranium2004 · 03-21-2005, 10:57 AM

While reading sockets i came across following code that states use of select but i am not understood it. How to interpret it?

fd_set socklist;

FD_ZERO(&socklist); /* Always clear the structure first. */
FD_SET(4, &socklist);
FD_SET(6, &socklist);
FD_SET(10, &socklist);
if (select(11, NULL, &socklist, NULL, NULL) < 0)
perror("select");

alred · 03-21-2005, 11:35 AM

the function select waits for something to happen(status changed),if changed,select will returns and you start to do something(to handle it)

in your case it seems that you are waiting for a write ready status.

check the man page for select for details.

::needs to clarify all these though