Re: detecting a closing socket from a Lex/Yacc interpreter ?
Jordan DeLong wrote: > > I'm assuming right now you are just setting yyin to the fd for the socket. > What you're gonna want to do is define the macro YY_INPUT (see the man page for > details) so that it calls recv on your socket. and then if it errors you can > have YY_INPUT return as an EOF and your <> rule will work fine. > indeed, taking the very simple YY_INPUT code from the man page of lex did the trick (+ remembering to close the fd's associated to the socket ...) Thanks -- Thierry Herbelot To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
Re: detecting a closing socket from a Lex/Yacc interpreter ?
I'm assuming right now you are just setting yyin to the fd for the socket. What you're gonna want to do is define the macro YY_INPUT (see the man page for details) so that it calls recv on your socket. and then if it errors you can have YY_INPUT return as an EOF and your <> rule will work fine. On Thu, Feb 22, 2001 at 09:32:42PM +0100, Thierry Herbelot wrote: > Hello, > > I'm currently writing a small interpreter for a client/server > application. > > the Lex and Yacc files seem to be OK, as the tests are running fine (as > long as there is only one client, and the client dos not close its > socket ...) > > I still have one problem : the server has a single thread : the process > accept()s a connection, then processes the commands (with yyparse()), > and after the current client disconnects, gets back to listening to the > socket, and so on. > > the problem is that the yyparse() function does not return when the > socket is closed. I've had a look at the sources of ftpd, where yacc is > used, but from what I've seen, the yylex() function has been hand > written (which I would like not to do) > > I've added a <> target in the lex file, but it does not seem to > detect the socket close() > > taker for any solution, > > TfH > -- > Thierry Herbelot > > To Unsubscribe: send mail to [EMAIL PROTECTED] > with "unsubscribe freebsd-hackers" in the body of the message To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
detecting a closing socket from a Lex/Yacc interpreter ?
Hello, I'm currently writing a small interpreter for a client/server application. the Lex and Yacc files seem to be OK, as the tests are running fine (as long as there is only one client, and the client dos not close its socket ...) I still have one problem : the server has a single thread : the process accept()s a connection, then processes the commands (with yyparse()), and after the current client disconnects, gets back to listening to the socket, and so on. the problem is that the yyparse() function does not return when the socket is closed. I've had a look at the sources of ftpd, where yacc is used, but from what I've seen, the yylex() function has been hand written (which I would like not to do) I've added a <> target in the lex file, but it does not seem to detect the socket close() taker for any solution, TfH -- Thierry Herbelot To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
