more probs

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From: Godmar Back (gback@cs.utah.edu)
Date: Thu Feb 11 1999 - 17:08:57 EST

Tim,

Two things:
First, I don't understand the change you made to jthread.c.

        intsDisable();
        for (;;) {
                r = read(fd, buf, len);
                if (r >= 0 || !(errno == EWOULDBLOCK || errno == EINTR
                                || errno == EAGAIN)) {
                        break; /* real error or success */
                }
                if (errno == EINTR) {
                        /* ignore */
                        continue;
                }
                else if (errno = EAGAIN) {
                        /* ignore - go back to sleep */
                }
                else if (haveBlocked) {
                        errno = EINTR;
                        break;
                }

                blockOnFile(fd, TH_READ, timeout);
                haveBlocked++;
        }
        if (r == -1) {
                r = errno;
        } else {
                *out = r;
                r = 0;
        }
        intsRestore();

By doing so, you will not return if you time out and still can't
read any data. Note that on most architectures, EAGAIN == EWOULDBLOCK.
What problem are trying to fix?

Second, the SoTimeout test segfaults for me. I'll check it out.

        - Godmar

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