SSend.c File Reference

#include "syshdrs.h"

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Functions
int	SSend (int sfd, char *buf0, size_t size, int fl, int tlen)

Function Documentation

SSend()

int SSend	(	int	sfd,
		char *	buf0,
		size_t	size,
		int	fl,
		int	tlen
	)

Definition at line 90 of file SSend.c.

{
    int nleft;
    char *buf = buf0;
    int nwrote, tleft;
    time_t done, now;
    fd_set ss;
    struct timeval tv;
    int result;

    nleft = (int) size;
    time(&now);
    done = now + tlen;
    forever {
        tleft = (int) (done - now);
        if (tleft < 1) {
            nwrote = size - nleft;
            if (nwrote == 0) {
                nwrote = kTimeoutErr;
                errno = ETIMEDOUT;
                SETWSATIMEOUTERR
            }
            goto done;
        }


        /* Unfortunately this doesn't help when the
         * send buffer fills during the time we're
         * writing to it, so you could still be
         * blocked after breaking this loop and starting
         * the write.
         */

        forever {
            errno = 0;
            FD_ZERO(&ss);
            FD_SET(sfd, &ss);
            tv.tv_sec = tlen;
            tv.tv_usec = 0;
            result = select(sfd + 1, NULL, SELECT_TYPE_ARG234 &ss, NULL, SELECT_TYPE_ARG5 &tv);
            if (result == 1) {
                /* ready */
                break;
            } else if (result == 0) {
                /* timeout */
                nwrote = size - nleft;
                if (nwrote > 0)
                    return (nwrote);
                errno = ETIMEDOUT;
                SETWSATIMEOUTERR
                return (kTimeoutErr);
            } else if (errno != EINTR) {
                return (-1);
            }
        }

        nwrote = send(sfd, buf, size, fl);

        if (nwrote < 0) {
            if (errno != EINTR) {
                nwrote = size - nleft;
                if (nwrote == 0)
                    nwrote = -1;
                goto done;
            } else {
                errno = 0;
                nwrote = 0;
                /* Try again. */
            }
        }
        nleft -= nwrote;
        if (nleft <= 0)
            break;
        buf += nwrote;
        time(&now);
    }
    nwrote = size - nleft;

done:
    return (nwrote);
}   /* SSend */