Junior <[EMAIL PROTECTED]> wrote: > Hi all, > When I do an FD_ISSET, does it clear that fd bit in the set or it leaves = > it as it is (set or not)? > If it leaves it then I'll have to do an FD_CLR and an FD_SET the next time = > around, correct? (if it is set) > > It would seem the FD_ISSET would/should take care of this, no?
The fdsets that you pass in to select are modified by select so that only the fds that need attention are set. FD_ISSET only tests the specified fd, it does not modify the fdset. The usual way to use select is in a loop. At the top you set all the fds in your fdsets, call select, the check which ones are still set using FD_ISSET(), then go back up to the top. See the select_tut(2) man page for examples. See W. Richard Stevens' "Advanced Programming in the Unix Environment" for a detailed description of what's happening. -- Sebastian Kuzminsky The universal acid of the true knowledge had burned away a world of words, and exposed a universe of things. Things we could use. -- Ken MacLeod -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
