/*
* Free the SockHandler structure
*/
void a_Dpip_dsh_free(Dsh *dsh)
{
dReturn_if (dsh == NULL);
dStr_free(dsh->wrbuf, 1);
dStr_free(dsh->rdbuf, 1);
dFree(dsh);
}
static void Dpi_close_fd(int fd)
{
int st;
dReturn_if (fd < 0);
do
st = close(fd);
while (st < 0 && errno == EINTR);
}
/*
* Read raw data from the socket into our buffer in
* either BLOCKING or NONBLOCKING mode.
*/
static void Dpip_dsh_read(Dsh *dsh, int blocking)
{
char buf[RBUF_SZ];
int req_mode, old_flags = 0, st, ret = -3, nb = !blocking;
dReturn_if (dsh->status == DPIP_ERROR || dsh->status == DPIP_EOF);
req_mode = (nb) ? DPIP_NONBLOCK : 0;
if ((dsh->mode & DPIP_NONBLOCK) != req_mode) {
/* change mode temporarily... */
old_flags = fcntl(dsh->fd_in, F_GETFL);
fcntl(dsh->fd_in, F_SETFL,
(nb) ? O_NONBLOCK | old_flags : old_flags & ~O_NONBLOCK);
}
while (1) {
st = read(dsh->fd_in, buf, RBUF_SZ);
if (st < 0) {
if (errno == EINTR) {
continue;
} else if (errno == EAGAIN) {
dsh->status = DPIP_EAGAIN;
ret = -1;
break;
} else {
MSG_ERR("[Dpip_dsh_read] %s\n", dStrerror(errno));
dsh->status = DPIP_ERROR;
break;
}
} else if (st == 0) {
dsh->status = DPIP_EOF;
break;
} else {
/* append to buf */
dStr_append_l(dsh->rdbuf, buf, st);
if (blocking)
break;
}
}
if ((dsh->mode & DPIP_NONBLOCK) != req_mode) {
/* restore old mode */
fcntl(dsh->fd_out, F_SETFL, old_flags);
}
/* assert there's no more data in the wire...
* (st < buf upon interrupt || st == buf and no more data) */
if (blocking)
Dpip_dsh_read(dsh, 0);
}