LinuxQuestions.org - stdin buffering woes

I am writing a simple IRC client, and I want to read from stdin. Currently I am selecting on file descriptor 0 thusly:

Code:

        while(1) {

                FD_SET(conn->sock, &rd);

                FD_SET(0, &rd);

                FD_SET(conn->sock, &wr);

                FD_SET(conn->sock, &ex);

                ret = select(conn->sock + 1, &rd, &wr, &ex, NULL);

                if(ret == -1)

                        return 1;

                if(FD_ISSET(conn->sock, &rd)) {

                        /* Process incoming messages */

                }

                if(FD_ISSET(0, &rd)) {

                        sz = read(0, &c, 1);

                        fprintf(stderr, "C\n");

                }

                if(FD_ISSET(conn->sock, &wr)) {

                        /* Send messages in send queue */

                }

                if(FD_ISSET(conn->sock, &ex)) {

                        fprintf(stderr, "Socket exception\n");

                        return 1;

                }

        }

I expected to see something like 'aCdCeC' if I typed ade. What actually happens is that 'ade' is echoed, then when I press enter 'CCCC' is printed (the extra C is for the line feed).

I have tried:

Code:

setvbuf(stdin, NULL, _IONBF, 0);

I was not surprised that this sis not work, as it is operating on the FILE* stream, not the file descriptor.

I want to read a character as soon as it is pressed. Any ideas?

Thanks