+ int n, ret=0;
+
+ io_flush();
+
+ while (ret == 0) {
+ /* until we manage to read *something* */
+ fd_set r_fds, w_fds;
+ struct timeval tv;
+ int fd_count = fd+1;
+ int count;
+
+ FD_ZERO(&r_fds);
+ FD_SET(fd, &r_fds);
+ if (io_error_fd != -1) {
+ FD_SET(io_error_fd, &r_fds);
+ if (io_error_fd >= fd_count) fd_count = io_error_fd+1;
+ }
+ if (io_filesfrom_f_out != -1) {
+ int new_fd;
+ if (io_filesfrom_buflen == 0) {
+ if (io_filesfrom_f_in != -1) {
+ FD_SET(io_filesfrom_f_in, &r_fds);
+ new_fd = io_filesfrom_f_in;
+ } else {
+ io_filesfrom_f_out = -1;
+ new_fd = -1;
+ }
+ } else {
+ FD_ZERO(&w_fds);
+ FD_SET(io_filesfrom_f_out, &w_fds);
+ new_fd = io_filesfrom_f_out;
+ }
+ if (new_fd >= fd_count) fd_count = new_fd+1;
+ }
+
+ tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT;
+ tv.tv_usec = 0;
+
+ errno = 0;
+
+ count = select(fd_count, &r_fds,
+ io_filesfrom_buflen? &w_fds : NULL,
+ NULL, &tv);
+
+ if (count == 0) {
+ check_timeout();
+ }
+
+ if (count <= 0) {
+ if (errno == EBADF) {
+ exit_cleanup(RERR_SOCKETIO);
+ }
+ continue;
+ }
+
+ if (io_error_fd != -1 && FD_ISSET(io_error_fd, &r_fds)) {
+ read_error_fd();
+ }
+
+ if (io_filesfrom_f_out != -1) {
+ if (io_filesfrom_buflen) {
+ if (FD_ISSET(io_filesfrom_f_out, &w_fds)) {
+ int l = write(io_filesfrom_f_out,
+ io_filesfrom_bp,
+ io_filesfrom_buflen);
+ if (l > 0) {
+ if (!(io_filesfrom_buflen -= l))
+ io_filesfrom_bp = io_filesfrom_buf;
+ else
+ io_filesfrom_bp += l;
+ } else {
+ /* XXX should we complain? */
+ io_filesfrom_f_out = -1;
+ }
+ }
+ } else if (io_filesfrom_f_in != -1) {
+ if (FD_ISSET(io_filesfrom_f_in, &r_fds)) {
+ int l = read(io_filesfrom_f_in,
+ io_filesfrom_buf,
+ sizeof io_filesfrom_buf);
+ if (l <= 0) {
+ /* Send end-of-file marker */
+ io_filesfrom_buf[0] = '\0';
+ io_filesfrom_buf[1] = '\0';
+ io_filesfrom_buflen = io_filesfrom_lastchar? 2 : 1;
+ io_filesfrom_f_in = -1;
+ } else {
+ extern int eol_nulls;
+ if (!eol_nulls) {
+ char *s = io_filesfrom_buf + l;
+ /* Transform CR and/or LF into '\0' */
+ while (s-- > io_filesfrom_buf) {
+ if (*s == '\n' || *s == '\r')
+ *s = '\0';
+ }
+ }
+ if (!io_filesfrom_lastchar) {
+ /* Last buf ended with a '\0', so don't
+ * let this buf start with one. */
+ while (l && !*io_filesfrom_bp)
+ io_filesfrom_bp++, l--;
+ }
+ if (!l)
+ io_filesfrom_bp = io_filesfrom_buf;
+ else {
+ char *f = io_filesfrom_bp;
+ char *t = f;
+ char *eob = f + l;
+ /* Eliminate any multi-'\0' runs. */
+ while (f != eob) {
+ if (!(*t++ = *f++)) {
+ while (f != eob && !*f)
+ f++, l--;
+ }
+ }
+ io_filesfrom_lastchar = f[-1];
+ }
+ io_filesfrom_buflen = l;
+ }
+ }
+ }
+ }
+
+ if (!FD_ISSET(fd, &r_fds)) continue;
+
+ n = read(fd, buf, len);
+
+ if (n > 0) {
+ buf += n;
+ len -= n;
+ ret += n;
+ if (io_timeout)
+ last_io = time(NULL);
+ continue;
+ } else if (n == 0) {
+ whine_about_eof();
+ return -1; /* doesn't return */
+ } else if (n == -1) {
+ if (errno == EINTR || errno == EWOULDBLOCK ||
+ errno == EAGAIN)
+ continue;
+ die_from_readerr(errno);
+ }
+ }