2 * The startup routines, including main(), for rsync.
4 * Copyright (C) 1996-2001 Andrew Tridgell <tridge@samba.org>
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
7 * Copyright (C) 2003-2020 Wayne Davison
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, visit the http://fsf.org website.
27 #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H
34 extern int io_timeout;
39 extern int inc_recurse;
40 extern int blocking_io;
41 extern int always_checksum;
42 extern int remove_source_files;
43 extern int output_needs_newline;
44 extern int called_from_signal_handler;
45 extern int need_messages_from_generator;
46 extern int kluge_around_eof;
47 extern int got_xfer_error;
48 extern int msgs2stderr;
51 extern int copy_links;
52 extern int copy_dirlinks;
53 extern int copy_unsafe_links;
54 extern int keep_dirlinks;
55 extern int preserve_hard_links;
56 extern int protocol_version;
57 extern int file_total;
60 extern int protect_args;
61 extern int relative_paths;
62 extern int sanitize_paths;
63 extern int curr_dir_depth;
64 extern int curr_dir_len;
66 extern int rsync_port;
67 extern int whole_file;
68 extern int read_batch;
69 extern int write_batch;
72 extern int sock_f_out;
73 extern int filesfrom_fd;
74 extern int connect_timeout;
75 extern int send_msgs_to_gen;
76 extern dev_t filesystem_dev;
77 extern pid_t cleanup_child_pid;
78 extern size_t bwlimit_writemax;
79 extern unsigned int module_dirlen;
80 extern BOOL flist_receiving_enabled;
81 extern BOOL want_progress_now;
82 extern BOOL shutting_down;
83 extern int backup_dir_len;
84 extern int basis_dir_cnt;
85 extern int default_af_hint;
86 extern struct stats stats;
87 extern char *stdout_format;
88 extern char *logfile_format;
89 extern char *filesfrom_host;
90 extern char *partial_dir;
91 extern char *rsync_path;
92 extern char *shell_cmd;
93 extern char *password_file;
94 extern char *backup_dir;
96 extern char curr_dir[MAXPATHLEN];
97 extern char backup_dir_buf[MAXPATHLEN];
98 extern char *basis_dir[MAX_BASIS_DIRS+1];
99 extern struct file_list *first_flist;
100 extern filter_rule_list daemon_filter_list;
104 int am_receiver = 0; /* Only set to 1 after the receiver/generator fork. */
105 int am_generator = 0; /* Only set to 1 after the receiver/generator fork. */
106 int local_server = 0;
107 int daemon_over_rsh = 0;
108 mode_t orig_umask = 0;
109 int batch_gen_fd = -1;
110 int sender_keeps_checksum = 0;
111 int raw_argc, cooked_argc;
112 char **raw_argv, **cooked_argv;
114 /* There's probably never more than at most 2 outstanding child processes,
115 * but set it higher, just in case. */
116 #define MAXCHILDPROCS 7
118 #ifdef HAVE_SIGACTION
119 # ifdef HAVE_SIGPROCMASK
120 # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
122 # define SIGACTMASK(n,h) SIGACTION(n,h)
124 static struct sigaction sigact;
130 } pid_stat_table[MAXCHILDPROCS];
132 static time_t starttime, endtime;
133 static int64 total_read, total_written;
135 static void show_malloc_stats(void);
137 /* Works like waitpid(), but if we already harvested the child pid in our
138 * remember_children(), we succeed instead of returning an error. */
139 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
144 waited_pid = waitpid(pid, status_ptr, flags);
145 } while (waited_pid == -1 && errno == EINTR);
147 if (waited_pid == -1 && errno == ECHILD) {
148 /* Status of requested child no longer available: check to
149 * see if it was processed by remember_children(). */
151 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
152 if (pid == pid_stat_table[cnt].pid) {
153 *status_ptr = pid_stat_table[cnt].status;
154 pid_stat_table[cnt].pid = 0;
163 int shell_exec(const char *cmd)
165 char *shell = getenv("RSYNC_SHELL");
172 if ((pid = fork()) < 0)
176 execlp(shell, shell, "-c", cmd, NULL);
180 int ret = wait_process(pid, &status, 0);
181 return ret < 0 ? -1 : status;
184 /* Wait for a process to exit, calling io_flush while waiting. */
185 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
190 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
192 io_flush(FULL_FLUSH);
195 /* TODO: If the child exited on a signal, then log an
196 * appropriate error message. Perhaps we should also accept a
197 * message describing the purpose of the child. Also indicate
198 * this to the caller so that they know something went wrong. */
199 if (waited_pid < 0) {
200 rsyserr(FERROR, errno, "waitpid");
201 *exit_code_ptr = RERR_WAITCHILD;
202 } else if (!WIFEXITED(status)) {
204 if (WCOREDUMP(status))
205 *exit_code_ptr = RERR_CRASHED;
208 if (WIFSIGNALED(status))
209 *exit_code_ptr = RERR_TERMINATED;
211 *exit_code_ptr = RERR_WAITCHILD;
213 *exit_code_ptr = WEXITSTATUS(status);
216 void write_del_stats(int f)
219 write_int(f, NDX_DEL_STATS);
221 write_ndx(f, NDX_DEL_STATS);
222 write_varint(f, stats.deleted_files - stats.deleted_dirs
223 - stats.deleted_symlinks - stats.deleted_devices
224 - stats.deleted_specials);
225 write_varint(f, stats.deleted_dirs);
226 write_varint(f, stats.deleted_symlinks);
227 write_varint(f, stats.deleted_devices);
228 write_varint(f, stats.deleted_specials);
231 void read_del_stats(int f)
233 stats.deleted_files = read_varint(f);
234 stats.deleted_files += stats.deleted_dirs = read_varint(f);
235 stats.deleted_files += stats.deleted_symlinks = read_varint(f);
236 stats.deleted_files += stats.deleted_devices = read_varint(f);
237 stats.deleted_files += stats.deleted_specials = read_varint(f);
240 static void become_copy_as_user()
249 if (DEBUG_GTE(CMD, 2))
250 rprintf(FINFO, "[%s] copy_as=%s\n", who_am_i(), copy_as);
252 if ((gname = strchr(copy_as, ':')) != NULL)
255 if (!user_to_uid(copy_as, &uid, True)) {
256 rprintf(FERROR, "Invalid copy-as user: %s\n", copy_as);
257 exit_cleanup(RERR_SYNTAX);
261 if (!group_to_gid(gname, &gid, True)) {
262 rprintf(FERROR, "Invalid copy-as group: %s\n", gname);
263 exit_cleanup(RERR_SYNTAX);
267 if ((pw = getpwuid(uid)) == NULL) {
268 rsyserr(FERROR, errno, "getpwuid failed");
269 exit_cleanup(RERR_SYNTAX);
274 if (setgid(gid) < 0) {
275 rsyserr(FERROR, errno, "setgid failed");
276 exit_cleanup(RERR_SYNTAX);
278 #ifdef HAVE_SETGROUPS
279 if (setgroups(1, &gid)) {
280 rsyserr(FERROR, errno, "setgroups failed");
281 exit_cleanup(RERR_SYNTAX);
284 #ifdef HAVE_INITGROUPS
285 if (!gname && initgroups(copy_as, gid) < 0) {
286 rsyserr(FERROR, errno, "initgroups failed");
287 exit_cleanup(RERR_SYNTAX);
296 rsyserr(FERROR, errno, "setuid failed");
297 exit_cleanup(RERR_SYNTAX);
302 am_root = (our_uid == 0);
308 /* This function gets called from all 3 processes. We want the client side
309 * to actually output the text, but the sender is the only process that has
310 * all the stats we need. So, if we're a client sender, we do the report.
311 * If we're a server sender, we write the stats on the supplied fd. If
312 * we're the client receiver we read the stats from the supplied fd and do
313 * the report. All processes might also generate a set of debug stats, if
314 * the verbose level is high enough (this is the only thing that the
315 * generator process and the server receiver ever do here). */
316 static void handle_stats(int f)
318 endtime = time(NULL);
320 /* Cache two stats because the read/write code can change it. */
321 total_read = stats.total_read;
322 total_written = stats.total_written;
324 if (INFO_GTE(STATS, 3)) {
325 /* These come out from every process */
334 if (f == -1 || !am_sender)
340 write_varlong30(f, total_read, 3);
341 write_varlong30(f, total_written, 3);
342 write_varlong30(f, stats.total_size, 3);
343 if (protocol_version >= 29) {
344 write_varlong30(f, stats.flist_buildtime, 3);
345 write_varlong30(f, stats.flist_xfertime, 3);
351 /* this is the client */
353 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
355 else if (!am_sender) {
356 /* Read the first two in opposite order because the meaning of
357 * read/write swaps when switching from sender to receiver. */
358 total_written = read_varlong30(f, 3);
359 total_read = read_varlong30(f, 3);
360 stats.total_size = read_varlong30(f, 3);
361 if (protocol_version >= 29) {
362 stats.flist_buildtime = read_varlong30(f, 3);
363 stats.flist_xfertime = read_varlong30(f, 3);
365 } else if (write_batch) {
366 /* The --read-batch process is going to be a client
367 * receiver, so we need to give it the stats. */
368 write_varlong30(batch_fd, total_read, 3);
369 write_varlong30(batch_fd, total_written, 3);
370 write_varlong30(batch_fd, stats.total_size, 3);
371 if (protocol_version >= 29) {
372 write_varlong30(batch_fd, stats.flist_buildtime, 3);
373 write_varlong30(batch_fd, stats.flist_xfertime, 3);
378 static void output_itemized_counts(const char *prefix, int *counts)
380 static char *labels[] = { "reg", "dir", "link", "dev", "special" };
381 char buf[1024], *pre = " (";
383 int total = counts[0];
385 counts[0] -= counts[1] + counts[2] + counts[3] + counts[4];
386 for (j = 0; j < 5; j++) {
388 len += snprintf(buf+len, sizeof buf - len - 2,
390 pre, labels[j], comma_num(counts[j]));
397 rprintf(FINFO, "%s: %s%s\n", prefix, comma_num(total), buf);
400 static const char *bytes_per_sec_human_dnum(void)
402 if (starttime == (time_t)-1 || endtime == (time_t)-1)
404 return human_dnum((total_written + total_read) / (0.5 + (endtime - starttime)), 2);
407 static void output_summary(void)
409 if (INFO_GTE(STATS, 2)) {
410 rprintf(FCLIENT, "\n");
411 output_itemized_counts("Number of files", &stats.num_files);
412 if (protocol_version >= 29)
413 output_itemized_counts("Number of created files", &stats.created_files);
414 if (protocol_version >= 31)
415 output_itemized_counts("Number of deleted files", &stats.deleted_files);
416 rprintf(FINFO,"Number of regular files transferred: %s\n",
417 comma_num(stats.xferred_files));
418 rprintf(FINFO,"Total file size: %s bytes\n",
419 human_num(stats.total_size));
420 rprintf(FINFO,"Total transferred file size: %s bytes\n",
421 human_num(stats.total_transferred_size));
422 rprintf(FINFO,"Literal data: %s bytes\n",
423 human_num(stats.literal_data));
424 rprintf(FINFO,"Matched data: %s bytes\n",
425 human_num(stats.matched_data));
426 rprintf(FINFO,"File list size: %s\n",
427 human_num(stats.flist_size));
428 if (stats.flist_buildtime) {
430 "File list generation time: %s seconds\n",
431 comma_dnum((double)stats.flist_buildtime / 1000, 3));
433 "File list transfer time: %s seconds\n",
434 comma_dnum((double)stats.flist_xfertime / 1000, 3));
436 rprintf(FINFO,"Total bytes sent: %s\n",
437 human_num(total_written));
438 rprintf(FINFO,"Total bytes received: %s\n",
439 human_num(total_read));
442 if (INFO_GTE(STATS, 1)) {
443 rprintf(FCLIENT, "\n");
445 "sent %s bytes received %s bytes %s bytes/sec\n",
446 human_num(total_written), human_num(total_read),
447 bytes_per_sec_human_dnum());
448 rprintf(FINFO, "total size is %s speedup is %s%s\n",
449 human_num(stats.total_size),
450 comma_dnum((double)stats.total_size / (total_written+total_read), 2),
451 write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : "");
460 * If our C library can get malloc statistics, then show them to FINFO
462 static void show_malloc_stats(void)
469 rprintf(FCLIENT, "\n");
470 rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
471 (int)getpid(), am_server ? "server " : "",
472 am_daemon ? "daemon " : "", who_am_i());
473 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
475 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
477 rprintf(FINFO, " smblks: %10ld\n",
479 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
481 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
483 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
484 (long)mi.arena + mi.hblkhd);
485 rprintf(FINFO, " usmblks: %10ld\n",
487 rprintf(FINFO, " fsmblks: %10ld\n",
489 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
491 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
493 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
495 #endif /* HAVE_MALLINFO */
499 /* Start the remote shell. cmd may be NULL to use the default. */
500 static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc,
501 int *f_in_p, int *f_out_p)
504 char *args[MAX_ARGS], *need_to_free = NULL;
508 if (!read_batch && !local_server) {
509 char *t, *f, in_quote = '\0';
510 char *rsh_env = getenv(RSYNC_RSH_ENV);
515 cmd = need_to_free = strdup(cmd);
517 for (t = f = cmd; *f; f++) {
520 /* Comparison leaves rooms for server_options(). */
521 if (argc >= MAX_ARGS - MAX_SERVER_ARGS)
524 while (*f != ' ' || in_quote) {
528 "Missing trailing-%c in remote-shell command.\n",
530 exit_cleanup(RERR_SYNTAX);
535 if (*f == '\'' || *f == '"') {
540 if (*f == in_quote && *++f != in_quote) {
550 /* NOTE: must preserve t == start of command name until the end of the args handling! */
551 if ((t = strrchr(cmd, '/')) != NULL)
556 /* Check to see if we've already been given '-l user' in the remote-shell command. */
557 for (i = 0; i < argc-1; i++) {
558 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
563 /* remsh (on HPUX) takes the arguments the other way around */
564 args[argc++] = machine;
565 if (user && !(daemon_over_rsh && dash_l_set)) {
570 if (user && !(daemon_over_rsh && dash_l_set)) {
575 if (default_af_hint == AF_INET && strcmp(t, "ssh") == 0)
576 args[argc++] = "-4"; /* we're using ssh so we can add a -4 option */
579 if (default_af_hint == AF_INET6 && strcmp(t, "ssh") == 0)
580 args[argc++] = "-6"; /* we're using ssh so we can add a -6 option */
582 args[argc++] = machine;
585 args[argc++] = rsync_path;
587 if (blocking_io < 0 && (strcmp(t, "rsh") == 0 || strcmp(t, "remsh") == 0))
590 server_options(args, &argc);
592 if (argc >= MAX_ARGS - 2)
598 if (!daemon_over_rsh) {
599 while (remote_argc > 0) {
600 if (argc >= MAX_ARGS - 1) {
602 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
603 exit_cleanup(RERR_SYNTAX);
605 if (**remote_argv == '-') {
606 if (asprintf(args + argc++, "./%s", *remote_argv++) < 0)
607 out_of_memory("do_cmd");
609 args[argc++] = *remote_argv++;
616 if (DEBUG_GTE(CMD, 2)) {
617 for (i = 0; i < argc; i++)
618 rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]);
619 rprintf(FCLIENT, "\n");
623 int from_gen_pipe[2];
624 set_allow_inc_recurse();
625 if (fd_pair(from_gen_pipe) < 0) {
626 rsyserr(FERROR, errno, "pipe");
627 exit_cleanup(RERR_IPC);
629 batch_gen_fd = from_gen_pipe[0];
630 *f_out_p = from_gen_pipe[1];
632 pid = (pid_t)-1; /* no child pid */
636 } else if (local_server) {
637 /* If the user didn't request --[no-]whole-file, force
638 * it on, but only if we're not batch processing. */
639 if (whole_file < 0 && !write_batch)
641 set_allow_inc_recurse();
642 pid = local_child(argc, args, f_in_p, f_out_p, child_main);
647 pid = piped_child(args, f_in_p, f_out_p);
651 if (protect_args && !daemon_over_rsh)
652 send_protected_args(*f_out_p, args);
661 /* The receiving side operates in one of two modes:
663 * 1. it receives any number of files into a destination directory,
664 * placing them according to their names in the file-list.
666 * 2. it receives a single file and saves it using the name in the
667 * destination path instead of its file-list name. This requires a
668 * "local name" for writing out the destination file.
670 * So, our task is to figure out what mode/local-name we need.
671 * For mode 1, we change into the destination directory and return NULL.
672 * For mode 2, we change into the directory containing the destination
673 * file (if we aren't already there) and return the local-name. */
674 static char *get_local_name(struct file_list *flist, char *dest_path)
680 if (DEBUG_GTE(RECV, 1)) {
681 rprintf(FINFO, "get_local_name count=%d %s\n",
682 file_total, NS(dest_path));
685 if (!dest_path || list_only)
688 /* Treat an empty string as a copy into the current directory. */
692 if (daemon_filter_list.head) {
693 char *slash = strrchr(dest_path, '/');
694 if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0')))
698 if ((*dest_path != '.' || dest_path[1] != '\0')
699 && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0
700 || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) {
701 rprintf(FERROR, "ERROR: daemon has excluded destination \"%s\"\n",
703 exit_cleanup(RERR_FILESELECT);
709 /* See what currently exists at the destination. */
710 if ((statret = do_stat(dest_path, &st)) == 0) {
711 /* If the destination is a dir, enter it and use mode 1. */
712 if (S_ISDIR(st.st_mode)) {
713 if (!change_dir(dest_path, CD_NORMAL)) {
714 rsyserr(FERROR, errno, "change_dir#1 %s failed",
715 full_fname(dest_path));
716 exit_cleanup(RERR_FILESELECT);
718 filesystem_dev = st.st_dev; /* ensures --force works right w/-x */
721 if (file_total > 1) {
723 "ERROR: destination must be a directory when"
724 " copying more than 1 file\n");
725 exit_cleanup(RERR_FILESELECT);
727 if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) {
729 "ERROR: cannot overwrite non-directory"
730 " with a directory\n");
731 exit_cleanup(RERR_FILESELECT);
733 } else if (errno != ENOENT) {
734 /* If we don't know what's at the destination, fail. */
735 rsyserr(FERROR, errno, "ERROR: cannot stat destination %s",
736 full_fname(dest_path));
737 exit_cleanup(RERR_FILESELECT);
740 cp = strrchr(dest_path, '/');
742 /* If we need a destination directory because the transfer is not
743 * of a single non-directory or the user has requested one via a
744 * destination path ending in a slash, create one and use mode 1. */
745 if (file_total > 1 || (cp && !cp[1])) {
746 /* Lop off the final slash (if any). */
751 rprintf(FERROR, "ERROR: destination path is not a directory\n");
752 exit_cleanup(RERR_SYNTAX);
755 if (do_mkdir(dest_path, ACCESSPERMS) != 0) {
756 rsyserr(FERROR, errno, "mkdir %s failed",
757 full_fname(dest_path));
758 exit_cleanup(RERR_FILEIO);
761 if (flist->high >= flist->low
762 && strcmp(flist->files[flist->low]->basename, ".") == 0)
763 flist->files[0]->flags |= FLAG_DIR_CREATED;
765 if (INFO_GTE(NAME, 1))
766 rprintf(FINFO, "created directory %s\n", dest_path);
769 /* Indicate that dest dir doesn't really exist. */
773 if (!change_dir(dest_path, dry_run > 1 ? CD_SKIP_CHDIR : CD_NORMAL)) {
774 rsyserr(FERROR, errno, "change_dir#2 %s failed",
775 full_fname(dest_path));
776 exit_cleanup(RERR_FILESELECT);
782 /* Otherwise, we are writing a single file, possibly on top of an
783 * existing non-directory. Change to the item's parent directory
784 * (if it has a path component), return the basename of the
785 * destination file as the local name, and use mode 2. */
793 if (!change_dir(dest_path, CD_NORMAL)) {
794 rsyserr(FERROR, errno, "change_dir#3 %s failed",
795 full_fname(dest_path));
796 exit_cleanup(RERR_FILESELECT);
803 /* This function checks on our alternate-basis directories. If we're in
804 * dry-run mode and the destination dir does not yet exist, we'll try to
805 * tweak any dest-relative paths to make them work for a dry-run (the
806 * destination dir must be in curr_dir[] when this function is called).
807 * We also warn about any arg that is non-existent or not a directory. */
808 static void check_alt_basis_dirs(void)
811 char *slash = strrchr(curr_dir, '/');
814 for (j = 0; j < basis_dir_cnt; j++) {
815 char *bdir = basis_dir[j];
816 int bd_len = strlen(bdir);
817 if (bd_len > 1 && bdir[bd_len-1] == '/')
818 bdir[--bd_len] = '\0';
819 if (dry_run > 1 && *bdir != '/') {
820 int len = curr_dir_len + 1 + bd_len + 1;
821 char *new = new_array(char, len);
822 if (slash && strncmp(bdir, "../", 3) == 0) {
823 /* We want to remove only one leading "../" prefix for
824 * the directory we couldn't create in dry-run mode:
825 * this ensures that any other ".." references get
826 * evaluated the same as they would for a live copy. */
828 pathjoin(new, len, curr_dir, bdir + 3);
831 pathjoin(new, len, curr_dir, bdir);
832 basis_dir[j] = bdir = new;
834 if (do_stat(bdir, &st) < 0)
835 rprintf(FWARNING, "%s arg does not exist: %s\n", alt_dest_opt(0), bdir);
836 else if (!S_ISDIR(st.st_mode))
837 rprintf(FWARNING, "%s arg is not a dir: %s\n", alt_dest_opt(0), bdir);
841 /* This is only called by the sender. */
842 static void read_final_goodbye(int f_in, int f_out)
846 char xname[MAXPATHLEN];
848 shutting_down = True;
850 if (protocol_version < 29)
853 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
854 if (protocol_version >= 31 && i == NDX_DONE) {
856 write_ndx(f_out, NDX_DONE);
858 if (batch_gen_fd >= 0) {
859 while (read_int(batch_gen_fd) != NDX_DEL_STATS) {}
860 read_del_stats(batch_gen_fd);
862 write_int(f_out, NDX_DONE);
864 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
869 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
871 exit_cleanup(RERR_PROTOCOL);
875 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
877 struct file_list *flist;
880 if (DEBUG_GTE(SEND, 1))
881 rprintf(FINFO, "server_sender starting pid=%d\n", (int)getpid());
883 if (am_daemon && lp_write_only(module_id)) {
884 rprintf(FERROR, "ERROR: module is write only\n");
885 exit_cleanup(RERR_SYNTAX);
887 if (am_daemon && read_only && remove_source_files) {
889 "ERROR: --remove-%s-files cannot be used with a read-only module\n",
890 remove_source_files == 1 ? "source" : "sent");
891 exit_cleanup(RERR_SYNTAX);
894 rprintf(FERROR, "ERROR: do_server_sender called without args\n");
895 exit_cleanup(RERR_SYNTAX);
898 become_copy_as_user();
901 if (!relative_paths) {
902 if (!change_dir(dir, CD_NORMAL)) {
903 rsyserr(FERROR, errno, "change_dir#3 %s failed",
905 exit_cleanup(RERR_FILESELECT);
911 if (argc == 0 && (recurse || xfer_dirs || list_only)) {
917 flist = send_file_list(f_out,argc,argv);
918 if (!flist || flist->used == 0) {
919 /* Make sure input buffering is off so we can't hang in noop_io_until_death(). */
920 io_end_buffering_in(0);
921 /* TODO: we should really exit in a more controlled manner. */
925 io_start_buffering_in(f_in);
927 send_files(f_in, f_out);
928 io_flush(FULL_FLUSH);
930 if (protocol_version >= 24)
931 read_final_goodbye(f_in, f_out);
932 io_flush(FULL_FLUSH);
937 static int do_recv(int f_in, int f_out, char *local_name)
943 /* The receiving side mustn't obey this, or an existing symlink that
944 * points to an identical file won't be replaced by the referent. */
945 copy_links = copy_dirlinks = copy_unsafe_links = 0;
947 #ifdef SUPPORT_HARD_LINKS
948 if (preserve_hard_links && !inc_recurse)
949 match_hard_links(first_flist);
952 if (fd_pair(error_pipe) < 0) {
953 rsyserr(FERROR, errno, "pipe failed in do_recv");
954 exit_cleanup(RERR_IPC);
960 if (backup_dir_len > 1)
961 backup_dir_buf[backup_dir_len-1] = '\0';
962 ret = do_stat(backup_dir_buf, &st);
963 if (ret != 0 || !S_ISDIR(st.st_mode)) {
965 rprintf(FERROR, "The backup-dir is not a directory: %s\n", backup_dir_buf);
966 exit_cleanup(RERR_SYNTAX);
968 if (errno != ENOENT) {
969 rprintf(FERROR, "Failed to stat %s: %s\n", backup_dir_buf, strerror(errno));
970 exit_cleanup(RERR_FILEIO);
972 if (INFO_GTE(BACKUP, 1))
973 rprintf(FINFO, "(new) backup_dir is %s\n", backup_dir_buf);
974 } else if (INFO_GTE(BACKUP, 1))
975 rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
976 if (backup_dir_len > 1)
977 backup_dir_buf[backup_dir_len-1] = '/';
980 io_flush(FULL_FLUSH);
982 if ((pid = do_fork()) == -1) {
983 rsyserr(FERROR, errno, "fork failed in do_recv");
984 exit_cleanup(RERR_IPC);
989 send_msgs_to_gen = am_server;
991 close(error_pipe[0]);
993 /* We can't let two processes write to the socket at one time. */
994 io_end_multiplex_out(MPLX_SWITCHING);
998 f_out = error_pipe[1];
1000 bwlimit_writemax = 0; /* receiver doesn't need to do this */
1003 io_start_buffering_in(f_in);
1004 io_start_multiplex_out(f_out);
1006 recv_files(f_in, f_out, local_name);
1007 io_flush(FULL_FLUSH);
1010 if (output_needs_newline) {
1011 fputc('\n', stdout);
1012 output_needs_newline = 0;
1015 write_int(f_out, NDX_DONE);
1016 send_msg(MSG_STATS, (char*)&stats.total_read, sizeof stats.total_read, 0);
1017 io_flush(FULL_FLUSH);
1019 /* Handle any keep-alive packets from the post-processing work
1020 * that the generator does. */
1021 if (protocol_version >= 29) {
1022 kluge_around_eof = -1;
1024 /* This should only get stopped via a USR2 signal. */
1025 read_final_goodbye(f_in, f_out);
1027 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
1029 exit_cleanup(RERR_PROTOCOL);
1032 /* Finally, we go to sleep until our parent kills us with a
1033 * USR2 signal. We sleep for a short time, as on some OSes
1034 * a signal won't interrupt a sleep! */
1040 flist_receiving_enabled = True;
1042 io_end_multiplex_in(MPLX_SWITCHING);
1043 if (write_batch && !am_server)
1046 close(error_pipe[1]);
1050 f_in = error_pipe[0];
1052 io_start_buffering_out(f_out);
1053 io_start_multiplex_in(f_in);
1055 #ifdef SUPPORT_HARD_LINKS
1056 if (preserve_hard_links && inc_recurse) {
1057 struct file_list *flist;
1058 for (flist = first_flist; flist; flist = flist->next)
1059 match_hard_links(flist);
1063 generate_files(f_out, local_name);
1066 io_flush(FULL_FLUSH);
1067 shutting_down = True;
1068 if (protocol_version >= 24) {
1069 /* send a final goodbye message */
1070 write_ndx(f_out, NDX_DONE);
1072 io_flush(FULL_FLUSH);
1075 wait_process_with_flush(pid, &exit_code);
1079 static void do_server_recv(int f_in, int f_out, int argc, char *argv[])
1082 struct file_list *flist;
1083 char *local_name = NULL;
1086 if (filesfrom_fd >= 0 && !msgs2stderr && protocol_version < 31) {
1087 /* We can't mix messages with files-from data on the socket,
1088 * so temporarily turn off info/debug messages. */
1089 negate_output_levels();
1094 if (DEBUG_GTE(RECV, 1))
1095 rprintf(FINFO, "server_recv(%d) starting pid=%d\n", argc, (int)getpid());
1097 if (am_daemon && read_only) {
1098 rprintf(FERROR,"ERROR: module is read only\n");
1099 exit_cleanup(RERR_SYNTAX);
1103 become_copy_as_user();
1106 char *dir = argv[0];
1109 if (!am_daemon && !change_dir(dir, CD_NORMAL)) {
1110 rsyserr(FERROR, errno, "change_dir#4 %s failed",
1112 exit_cleanup(RERR_FILESELECT);
1116 if (protocol_version >= 30)
1117 io_start_multiplex_in(f_in);
1119 io_start_buffering_in(f_in);
1120 recv_filter_list(f_in);
1122 if (filesfrom_fd >= 0) {
1123 /* We need to send the files-from names to the sender at the
1124 * same time that we receive the file-list from them, so we
1125 * need the IO routines to automatically write out the names
1126 * onto our f_out socket as we read the file-list. This
1127 * avoids both deadlock and extra delays/buffers. */
1128 start_filesfrom_forwarding(filesfrom_fd);
1132 flist = recv_file_list(f_in, -1);
1134 rprintf(FERROR,"server_recv: recv_file_list error\n");
1135 exit_cleanup(RERR_FILESELECT);
1137 if (inc_recurse && file_total == 1)
1138 recv_additional_file_list(f_in);
1141 negate_output_levels();
1144 local_name = get_local_name(flist,argv[0]);
1146 /* Now that we know what our destination directory turned out to be,
1147 * we can sanitize the --link-/copy-/compare-dest args correctly. */
1148 if (sanitize_paths) {
1150 for (dir_p = basis_dir; *dir_p; dir_p++)
1151 *dir_p = sanitize_path(NULL, *dir_p, NULL, curr_dir_depth, SP_DEFAULT);
1153 partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, SP_DEFAULT);
1155 check_alt_basis_dirs();
1157 if (daemon_filter_list.head) {
1159 filter_rule_list *elp = &daemon_filter_list;
1161 for (dir_p = basis_dir; *dir_p; dir_p++) {
1164 dir += module_dirlen;
1165 if (check_filter(elp, FLOG, dir, 1) < 0)
1166 goto options_rejected;
1168 if (partial_dir && *partial_dir == '/'
1169 && check_filter(elp, FLOG, partial_dir + module_dirlen, 1) < 0) {
1171 rprintf(FERROR, "Your options have been rejected by the server.\n");
1172 exit_cleanup(RERR_SYNTAX);
1176 exit_code = do_recv(f_in, f_out, local_name);
1177 exit_cleanup(exit_code);
1181 int child_main(int argc, char *argv[])
1183 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1188 void start_server(int f_in, int f_out, int argc, char *argv[])
1190 set_nonblocking(f_in);
1191 set_nonblocking(f_out);
1193 io_set_sock_fds(f_in, f_out);
1194 setup_protocol(f_out, f_in);
1196 if (protocol_version >= 23)
1197 io_start_multiplex_out(f_out);
1198 if (am_daemon && io_timeout && protocol_version >= 31)
1199 send_msg_int(MSG_IO_TIMEOUT, io_timeout);
1202 keep_dirlinks = 0; /* Must be disabled on the sender. */
1203 if (need_messages_from_generator)
1204 io_start_multiplex_in(f_in);
1206 io_start_buffering_in(f_in);
1207 recv_filter_list(f_in);
1208 do_server_sender(f_in, f_out, argc, argv);
1210 do_server_recv(f_in, f_out, argc, argv);
1214 /* This is called once the connection has been negotiated. It is used
1215 * for rsyncd, remote-shell, and local connections. */
1216 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
1218 struct file_list *flist = NULL;
1219 int exit_code = 0, exit_code2 = 0;
1220 char *local_name = NULL;
1222 cleanup_child_pid = pid;
1224 set_nonblocking(f_in);
1225 set_nonblocking(f_out);
1228 io_set_sock_fds(f_in, f_out);
1229 setup_protocol(f_out,f_in);
1231 /* We set our stderr file handle to blocking because ssh might have
1232 * set it to non-blocking. This can be particularly troublesome if
1233 * stderr is a clone of stdout, because ssh would have set our stdout
1234 * to non-blocking at the same time (which can easily cause us to lose
1235 * output from our print statements). This kluge shouldn't cause ssh
1236 * any problems for how we use it. Note also that we delayed setting
1237 * this until after the above protocol setup so that we know for sure
1238 * that ssh is done twiddling its file descriptors. */
1239 set_blocking(STDERR_FILENO);
1242 keep_dirlinks = 0; /* Must be disabled on the sender. */
1245 && (log_format_has(stdout_format, 'C')
1246 || log_format_has(logfile_format, 'C')))
1247 sender_keeps_checksum = 1;
1249 if (protocol_version >= 30)
1250 io_start_multiplex_out(f_out);
1252 io_start_buffering_out(f_out);
1253 if (protocol_version >= 31 || (!filesfrom_host && protocol_version >= 23))
1254 io_start_multiplex_in(f_in);
1256 io_start_buffering_in(f_in);
1257 send_filter_list(f_out);
1259 filesfrom_fd = f_in;
1261 if (write_batch && !am_server)
1262 start_write_batch(f_out);
1264 become_copy_as_user();
1266 flist = send_file_list(f_out, argc, argv);
1267 if (DEBUG_GTE(FLIST, 3))
1268 rprintf(FINFO,"file list sent\n");
1270 if (protocol_version < 31 && filesfrom_host && protocol_version >= 23)
1271 io_start_multiplex_in(f_in);
1273 io_flush(NORMAL_FLUSH);
1274 send_files(f_in, f_out);
1275 io_flush(FULL_FLUSH);
1277 if (protocol_version >= 24)
1278 read_final_goodbye(f_in, f_out);
1280 if (DEBUG_GTE(EXIT, 2))
1281 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
1282 io_flush(FULL_FLUSH);
1283 wait_process_with_flush(pid, &exit_code);
1286 io_flush(FULL_FLUSH);
1287 exit_cleanup(exit_code);
1291 if (protocol_version >= 23)
1292 io_start_multiplex_in(f_in);
1293 if (need_messages_from_generator)
1294 io_start_multiplex_out(f_out);
1296 io_start_buffering_out(f_out);
1299 become_copy_as_user();
1301 send_filter_list(read_batch ? -1 : f_out);
1303 if (filesfrom_fd >= 0) {
1304 start_filesfrom_forwarding(filesfrom_fd);
1308 if (write_batch && !am_server)
1309 start_write_batch(f_in);
1310 flist = recv_file_list(f_in, -1);
1311 if (inc_recurse && file_total == 1)
1312 recv_additional_file_list(f_in);
1314 if (flist && flist->used > 0) {
1315 local_name = get_local_name(flist, argv[0]);
1317 check_alt_basis_dirs();
1319 exit_code2 = do_recv(f_in, f_out, local_name);
1326 if (DEBUG_GTE(RECV, 1))
1327 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
1328 io_flush(FULL_FLUSH);
1329 wait_process_with_flush(pid, &exit_code);
1332 return MAX(exit_code, exit_code2);
1335 static void dup_argv(char *argv[])
1339 for (i = 0; argv[i]; i++)
1340 argv[i] = strdup(argv[i]);
1344 /* Start a client for either type of remote connection. Work out
1345 * whether the arguments request a remote shell or rsyncd connection,
1346 * and call the appropriate connection function, then run_client.
1348 * Calls either start_socket_client (for sockets) or do_cmd and
1349 * client_run (for ssh). */
1350 static int start_client(int argc, char *argv[])
1352 char *p, *shell_machine = NULL, *shell_user = NULL;
1354 int remote_argc, env_port = rsync_port;
1359 /* Don't clobber argv[] so that ps(1) can still show the right
1363 if (!read_batch) { /* for read_batch, NO source is specified */
1364 char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1365 if (path) { /* source is remote */
1372 if (argc == 1 || **argv == ':')
1373 argc = 0; /* no dest arg */
1374 else if (check_for_hostspec(*argv, &dummy_host, &dummy_port)) {
1376 "The source and destination cannot both be remote.\n");
1377 exit_cleanup(RERR_SYNTAX);
1379 remote_argc--; /* don't count dest */
1382 if (filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) {
1384 "--files-from hostname is not the same as the transfer hostname\n");
1385 exit_cleanup(RERR_SYNTAX);
1389 daemon_over_rsh = shell_cmd ? 1 : -1;
1390 } else { /* source is local, check dest arg */
1395 remote_argv = argv + argc;
1397 static char *dotarg[1] = { "." };
1399 remote_argv = dotarg;
1403 path = check_for_hostspec(p, &shell_machine, &rsync_port);
1404 if (path && filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) {
1406 "--files-from hostname is not the same as the transfer hostname\n");
1407 exit_cleanup(RERR_SYNTAX);
1409 if (!path) { /* no hostspec found, so src & dest are local */
1411 if (filesfrom_host) {
1413 "--files-from cannot be remote when the transfer is local\n");
1414 exit_cleanup(RERR_SYNTAX);
1416 shell_machine = NULL;
1418 } else { /* hostspec was found, so dest is remote */
1421 daemon_over_rsh = shell_cmd ? 1 : -1;
1424 } else { /* read_batch */
1426 if (check_for_hostspec(argv[argc-1], &shell_machine, &rsync_port)) {
1427 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1428 exit_cleanup(RERR_SYNTAX);
1430 remote_argv = argv += argc - 1;
1431 remote_argc = argc = 1;
1435 if (!rsync_port && remote_argc && !**remote_argv) /* Turn an empty arg into a dot dir. */
1440 int dummy_port = rsync_port;
1442 /* For local source, extra source args must not have hostspec. */
1443 for (i = 1; i < argc; i++) {
1444 if (check_for_hostspec(argv[i], &dummy_host, &dummy_port)) {
1445 rprintf(FERROR, "Unexpected remote arg: %s\n", argv[i]);
1446 exit_cleanup(RERR_SYNTAX);
1451 int dummy_port = rsync_port;
1453 /* For remote source, any extra source args must have either
1454 * the same hostname or an empty hostname. */
1455 for (i = 1; i < remote_argc; i++) {
1456 char *arg = check_for_hostspec(remote_argv[i], &dummy_host, &dummy_port);
1458 rprintf(FERROR, "Unexpected local arg: %s\n", remote_argv[i]);
1459 rprintf(FERROR, "If arg is a remote file/dir, prefix it with a colon (:).\n");
1460 exit_cleanup(RERR_SYNTAX);
1462 if (*dummy_host && strcmp(dummy_host, shell_machine) != 0) {
1463 rprintf(FERROR, "All source args must come from the same machine.\n");
1464 exit_cleanup(RERR_SYNTAX);
1466 if (rsync_port != dummy_port) {
1467 if (!rsync_port || !dummy_port)
1468 rprintf(FERROR, "All source args must use the same hostspec format.\n");
1470 rprintf(FERROR, "All source args must use the same port number.\n");
1471 exit_cleanup(RERR_SYNTAX);
1473 if (!rsync_port && !*arg) /* Turn an empty arg into a dot dir. */
1475 remote_argv[i] = arg;
1480 rsync_port = RSYNC_PORT;
1482 env_port = rsync_port;
1484 if (daemon_over_rsh < 0)
1485 return start_socket_client(shell_machine, remote_argc, remote_argv, argc, argv);
1487 if (password_file && !daemon_over_rsh) {
1488 rprintf(FERROR, "The --password-file option may only be "
1489 "used when accessing an rsync daemon.\n");
1490 exit_cleanup(RERR_SYNTAX);
1493 if (connect_timeout) {
1494 rprintf(FERROR, "The --contimeout option may only be "
1495 "used when connecting to an rsync daemon.\n");
1496 exit_cleanup(RERR_SYNTAX);
1499 if (shell_machine) {
1500 p = strrchr(shell_machine,'@');
1503 shell_user = shell_machine;
1504 shell_machine = p+1;
1508 if (DEBUG_GTE(CMD, 2)) {
1509 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1510 NS(shell_cmd), NS(shell_machine), NS(shell_user),
1511 NS(remote_argv[0]));
1515 if (daemon_over_rsh)
1516 set_env_num("RSYNC_PORT", env_port);
1519 pid = do_cmd(shell_cmd, shell_machine, shell_user, remote_argv, remote_argc, &f_in, &f_out);
1521 /* if we're running an rsync server on the remote host over a
1522 * remote shell command, we need to do the RSYNCD protocol first */
1523 if (daemon_over_rsh) {
1525 tmpret = start_inband_exchange(f_in, f_out, shell_user, remote_argc, remote_argv);
1530 ret = client_run(f_in, f_out, pid, argc, argv);
1539 static void sigusr1_handler(UNUSED(int val))
1541 called_from_signal_handler = 1;
1542 exit_cleanup(RERR_SIGNAL1);
1545 static void sigusr2_handler(UNUSED(int val))
1551 _exit(RERR_PARTIAL);
1555 static void siginfo_handler(UNUSED(int val))
1557 if (!am_server && !INFO_GTE(PROGRESS, 1))
1558 want_progress_now = True;
1561 void remember_children(UNUSED(int val))
1566 /* An empty waitpid() loop was put here by Tridge and we could never
1567 * get him to explain why he put it in, so rather than taking it
1568 * out we're instead saving the child exit statuses for later use.
1569 * The waitpid() loop presumably eliminates all possibility of leaving
1570 * zombie children, maybe that's why he did it. */
1571 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1572 /* save the child's exit status */
1573 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1574 if (pid_stat_table[cnt].pid == 0) {
1575 pid_stat_table[cnt].pid = pid;
1576 pid_stat_table[cnt].status = status;
1582 #ifndef HAVE_SIGACTION
1583 signal(SIGCHLD, remember_children);
1589 * This routine catches signals and tries to send them to gdb.
1591 * Because it's called from inside a signal handler it ought not to
1592 * use too many library routines.
1594 * @todo Perhaps use "screen -X" instead/as well, to help people
1595 * debugging without easy access to X. Perhaps use an environment
1596 * variable, or just call a script?
1598 * @todo The /proc/ magic probably only works on Linux (and
1599 * Solaris?) Can we be more portable?
1601 #ifdef MAINTAINER_MODE
1602 const char *get_panic_action(void)
1604 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1608 return "xterm -display :0 -T Panic -n Panic -e gdb /proc/%d/exe %d";
1613 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1615 * This signal handler is only installed if we were configured with
1616 * --enable-maintainer-mode. Perhaps it should always be on and we
1617 * should just look at the environment variable, but I'm a bit leery
1618 * of a signal sending us into a busy loop.
1620 static void rsync_panic_handler(UNUSED(int whatsig))
1623 int ret, pid_int = getpid();
1625 snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(), pid_int, pid_int);
1627 /* Unless we failed to execute gdb, we allow the process to
1628 * continue. I'm not sure if that's right. */
1629 ret = shell_exec(cmd_buf);
1636 int main(int argc,char *argv[])
1643 #ifdef HAVE_SIGACTION
1644 # ifdef HAVE_SIGPROCMASK
1647 sigemptyset(&sigmask);
1649 sigact.sa_flags = SA_NOCLDSTOP;
1651 SIGACTMASK(SIGUSR1, sigusr1_handler);
1652 SIGACTMASK(SIGUSR2, sigusr2_handler);
1653 SIGACTMASK(SIGCHLD, remember_children);
1654 #ifdef MAINTAINER_MODE
1655 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1656 SIGACTMASK(SIGFPE, rsync_panic_handler);
1657 SIGACTMASK(SIGABRT, rsync_panic_handler);
1658 SIGACTMASK(SIGBUS, rsync_panic_handler);
1661 SIGACTMASK(SIGINFO, siginfo_handler);
1664 SIGACTMASK(SIGVTALRM, siginfo_handler);
1667 starttime = time(NULL);
1670 am_root = our_uid == 0;
1672 memset(&stats, 0, sizeof(stats));
1674 /* Even a non-daemon runs needs the default config values to be set, e.g.
1675 * lp_dont_compress() is queried when no --skip-compress option is set. */
1676 reset_daemon_vars();
1680 exit_cleanup(RERR_SYNTAX);
1683 /* Get the umask for use in permission calculations. We no longer set
1684 * it to zero; that is ugly and pointless now that all the callers that
1685 * relied on it have been reeducated to work with default ACLs. */
1686 umask(orig_umask = umask(0));
1688 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1689 setlocale(LC_CTYPE, "");
1692 if (!parse_arguments(&argc, (const char ***) &argv)) {
1694 exit_cleanup(RERR_SYNTAX);
1697 && poptDupArgv(argc, (const char **)argv, &cooked_argc, (const char ***)&cooked_argv) != 0)
1698 out_of_memory("main");
1700 SIGACTMASK(SIGINT, sig_int);
1701 SIGACTMASK(SIGHUP, sig_int);
1702 SIGACTMASK(SIGTERM, sig_int);
1703 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1704 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1707 /* Ignore SIGPIPE; we consistently check error codes and will
1709 SIGACTION(SIGPIPE, SIG_IGN);
1711 SIGACTION(SIGXFSZ, SIG_IGN);
1714 /* Initialize change_dir() here because on some old systems getcwd
1715 * (implemented by forking "pwd" and reading its output) doesn't
1716 * work when there are other child processes. Also, on all systems
1717 * that implement getcwd that way "pwd" can't be found after chroot. */
1718 change_dir(NULL, CD_NORMAL);
1720 if ((write_batch || read_batch) && !am_server) {
1721 open_batch_files(); /* sets batch_fd */
1723 read_stream_flags(batch_fd);
1725 write_stream_flags(batch_fd);
1727 if (write_batch < 0)
1734 } else if (am_daemon)
1735 return daemon_main();
1737 if (am_server && protect_args) {
1738 char buf[MAXPATHLEN];
1740 read_args(STDIN_FILENO, NULL, buf, sizeof buf, 1, &argv, &argc, NULL);
1741 if (!parse_arguments(&argc, (const char ***) &argv)) {
1743 exit_cleanup(RERR_SYNTAX);
1749 exit_cleanup(RERR_SYNTAX);
1753 set_nonblocking(STDIN_FILENO);
1754 set_nonblocking(STDOUT_FILENO);
1756 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1757 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1760 ret = start_client(argc, argv);
1762 exit_cleanup(RERR_STARTCLIENT);