+ int pid;
+ int exit_code = 0;
+ int error_pipe[2];
+
+ /* The receiving side mustn't obey this, or an existing symlink that
+ * points to an identical file won't be replaced by the referent. */
+ copy_links = 0;
+
+ if (preserve_hard_links)
+ init_hard_links();
+
+ if (fd_pair(error_pipe) < 0) {
+ rsyserr(FERROR, errno, "pipe failed in do_recv");
+ exit_cleanup(RERR_IPC);
+ }
+
+ io_flush(NORMAL_FLUSH);
+
+ if ((pid = do_fork()) == -1) {
+ rsyserr(FERROR, errno, "fork failed in do_recv");
+ exit_cleanup(RERR_IPC);
+ }
+
+ if (pid == 0) {
+ close(error_pipe[0]);
+ if (f_in != f_out)
+ close(f_out);
+
+ /* we can't let two processes write to the socket at one time */
+ close_multiplexing_out();
+
+ /* set place to send errors */
+ set_msg_fd_out(error_pipe[1]);
+
+ recv_files(f_in, flist, local_name);
+ io_flush(FULL_FLUSH);
+ handle_stats(f_in);
+
+ send_msg(MSG_DONE, "", 0);
+ io_flush(FULL_FLUSH);
+
+ /* Handle any keep-alive packets from the post-processing work
+ * that the generator does. */
+ if (protocol_version >= 29) {
+ kluge_around_eof = -1;
+
+ /* This should only get stopped via a USR2 signal. */
+ while (read_int(f_in) == flist->count
+ && read_shortint(f_in) == ITEM_IS_NEW) {}
+
+ rprintf(FERROR, "Invalid packet at end of run [%s]\n",
+ who_am_i());
+ exit_cleanup(RERR_PROTOCOL);
+ }
+
+ /* Finally, we go to sleep until our parent kills us with a
+ * USR2 signal. We sleep for a short time, as on some OSes
+ * a signal won't interrupt a sleep! */
+ while (1)
+ msleep(20);
+ }
+
+ am_generator = 1;
+ close_multiplexing_in();
+ if (write_batch && !am_server)
+ stop_write_batch();
+
+ close(error_pipe[1]);
+ if (f_in != f_out)
+ close(f_in);
+
+ io_start_buffering_out();
+
+ set_msg_fd_in(error_pipe[0]);
+
+ generate_files(f_out, flist, local_name);
+
+ handle_stats(-1);
+ io_flush(FULL_FLUSH);
+ if (protocol_version >= 24) {
+ /* send a final goodbye message */
+ write_int(f_out, -1);
+ }
+ io_flush(FULL_FLUSH);
+
+ set_msg_fd_in(-1);
+ kill(pid, SIGUSR2);
+ wait_process_with_flush(pid, &exit_code);
+ return exit_code;
+}
+
+
+static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
+{
+ int exit_code;
+ struct file_list *flist;
+ char *local_name = NULL;
+ char *dir = NULL;
+ int save_verbose = verbose;
+
+ if (filesfrom_fd >= 0) {
+ /* We can't mix messages with files-from data on the socket,
+ * so temporarily turn off verbose messages. */
+ verbose = 0;
+ }
+
+ if (verbose > 2) {
+ rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
+ argc, (long)getpid());
+ }
+
+ if (am_daemon && lp_read_only(module_id)) {
+ rprintf(FERROR,"ERROR: module is read only\n");
+ exit_cleanup(RERR_SYNTAX);
+ return;
+ }
+
+ if (argc > 0) {
+ dir = argv[0];
+ argc--;
+ argv++;
+ if (!am_daemon && !push_dir(dir)) {
+ rsyserr(FERROR, errno, "push_dir#4 %s failed",
+ full_fname(dir));
+ exit_cleanup(RERR_FILESELECT);
+ }
+ }
+
+ io_start_buffering_in();
+ recv_filter_list(f_in);
+
+ if (filesfrom_fd >= 0) {
+ /* We need to send the files-from names to the sender at the
+ * same time that we receive the file-list from them, so we
+ * need the IO routines to automatically write out the names
+ * onto our f_out socket as we read the file-list. This
+ * avoids both deadlock and extra delays/buffers. */
+ io_set_filesfrom_fds(filesfrom_fd, f_out);
+ filesfrom_fd = -1;
+ }
+
+ flist = recv_file_list(f_in);
+ verbose = save_verbose;
+ if (!flist) {
+ rprintf(FERROR,"server_recv: recv_file_list error\n");
+ exit_cleanup(RERR_FILESELECT);
+ }
+ the_file_list = flist;
+
+ if (argc > 0)
+ local_name = get_local_name(flist,argv[0]);
+
+ exit_code = do_recv(f_in,f_out,flist,local_name);
+ exit_cleanup(exit_code);
+}
+
+
+int child_main(int argc, char *argv[])
+{
+ start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
+ return 0;
+}
+
+
+void start_server(int f_in, int f_out, int argc, char *argv[])
+{
+ set_nonblocking(f_in);
+ set_nonblocking(f_out);
+
+ io_set_sock_fds(f_in, f_out);
+ setup_protocol(f_out, f_in);
+#if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
+ setup_iconv();
+#endif
+
+ if (protocol_version >= 23)
+ io_start_multiplex_out();
+
+ if (am_sender) {
+ keep_dirlinks = 0; /* Must be disabled on the sender. */
+ if (need_messages_from_generator)
+ io_start_multiplex_in();
+
+ recv_filter_list(f_in);
+ do_server_sender(f_in, f_out, argc, argv);
+ } else {
+ do_server_recv(f_in, f_out, argc, argv);
+ }
+ exit_cleanup(0);
+}
+
+
+/*
+ * This is called once the connection has been negotiated. It is used
+ * for rsyncd, remote-shell, and local connections.
+ */
+int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
+{
+ struct file_list *flist = NULL;
+ int exit_code = 0, exit_code2 = 0;
+ char *local_name = NULL;
+
+ cleanup_child_pid = pid;
+ if (!read_batch) {
+ set_nonblocking(f_in);
+ set_nonblocking(f_out);
+ }
+
+ io_set_sock_fds(f_in, f_out);
+ setup_protocol(f_out,f_in);
+#if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
+ setup_iconv();
+#endif
+
+ if (protocol_version >= 23 && !read_batch)
+ io_start_multiplex_in();
+
+ /* We set our stderr file handle to blocking because ssh might have
+ * set it to non-blocking. This can be particularly troublesome if
+ * stderr is a clone of stdout, because ssh would have set our stdout
+ * to non-blocking at the same time (which can easily cause us to lose
+ * output from our print statements). This kluge shouldn't cause ssh
+ * any problems for how we use it. Note also that we delayed setting
+ * this until after the above protocol setup so that we know for sure
+ * that ssh is done twiddling its file descriptors. */
+ set_blocking(STDERR_FILENO);
+
+ if (am_sender) {
+ keep_dirlinks = 0; /* Must be disabled on the sender. */
+ io_start_buffering_out();
+ if (!filesfrom_host)
+ set_msg_fd_in(f_in);
+ send_filter_list(f_out);
+ if (filesfrom_host)
+ filesfrom_fd = f_in;
+
+ if (write_batch && !am_server)
+ start_write_batch(f_out);
+ flist = send_file_list(f_out, argc, argv);
+ set_msg_fd_in(-1);
+ if (verbose > 3)
+ rprintf(FINFO,"file list sent\n");
+ the_file_list = flist;
+
+ io_flush(NORMAL_FLUSH);
+ send_files(flist,f_out,f_in);
+ io_flush(FULL_FLUSH);
+ handle_stats(-1);
+ if (protocol_version >= 24)
+ read_final_goodbye(f_in, f_out);
+ if (pid != -1) {
+ if (verbose > 3)
+ rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
+ io_flush(FULL_FLUSH);
+ wait_process_with_flush(pid, &exit_code);
+ }
+ output_summary();
+ io_flush(FULL_FLUSH);
+ exit_cleanup(exit_code);
+ }
+
+ if (need_messages_from_generator && !read_batch)
+ io_start_multiplex_out();
+
+ if (argc == 0)
+ list_only |= 1;
+
+ send_filter_list(read_batch ? -1 : f_out);
+
+ if (filesfrom_fd >= 0) {
+ io_set_filesfrom_fds(filesfrom_fd, f_out);
+ filesfrom_fd = -1;
+ }
+
+ if (write_batch && !am_server)
+ start_write_batch(f_in);
+ flist = recv_file_list(f_in);
+ the_file_list = flist;
+
+ if (flist && flist->count > 0) {
+ local_name = get_local_name(flist, argv[0]);
+
+ exit_code2 = do_recv(f_in, f_out, flist, local_name);
+ } else {
+ handle_stats(-1);
+ output_summary();
+ }
+
+ if (pid != -1) {
+ if (verbose > 3)
+ rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
+ io_flush(FULL_FLUSH);
+ wait_process_with_flush(pid, &exit_code);
+ }
+
+ return MAX(exit_code, exit_code2);
+}
+
+static int copy_argv (char *argv[])
+{
+ int i;
+
+ for (i = 0; argv[i]; i++) {
+ if (!(argv[i] = strdup(argv[i]))) {
+ rprintf (FERROR, "out of memory at %s(%d)\n",
+ __FILE__, __LINE__);
+ return RERR_MALLOC;
+ }
+ }