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
32 #include <floss.h(floss_execlp)>
37 extern int io_timeout;
42 extern int inc_recurse;
43 extern int blocking_io;
44 extern int always_checksum;
45 extern int remove_source_files;
46 extern int output_needs_newline;
47 extern int called_from_signal_handler;
48 extern int need_messages_from_generator;
49 extern int kluge_around_eof;
50 extern int got_xfer_error;
51 extern int msgs2stderr;
54 extern int copy_links;
55 extern int copy_dirlinks;
56 extern int copy_unsafe_links;
57 extern int keep_dirlinks;
58 extern int preserve_hard_links;
59 extern int protocol_version;
60 extern int file_total;
63 extern int protect_args;
64 extern int relative_paths;
65 extern int sanitize_paths;
66 extern int curr_dir_depth;
67 extern int curr_dir_len;
69 extern int rsync_port;
70 extern int whole_file;
71 extern int read_batch;
72 extern int write_batch;
75 extern int sock_f_out;
76 extern int filesfrom_fd;
77 extern int connect_timeout;
78 extern int send_msgs_to_gen;
79 extern dev_t filesystem_dev;
80 extern pid_t cleanup_child_pid;
81 extern size_t bwlimit_writemax;
82 extern unsigned int module_dirlen;
83 extern BOOL flist_receiving_enabled;
84 extern BOOL want_progress_now;
85 extern BOOL shutting_down;
86 extern int backup_dir_len;
87 extern int basis_dir_cnt;
88 extern int default_af_hint;
89 extern struct stats stats;
90 extern char *stdout_format;
91 extern char *logfile_format;
92 extern char *filesfrom_host;
93 extern char *partial_dir;
94 extern char *rsync_path;
95 extern char *shell_cmd;
96 extern char *password_file;
97 extern char *backup_dir;
99 extern char curr_dir[MAXPATHLEN];
100 extern char backup_dir_buf[MAXPATHLEN];
101 extern char *basis_dir[MAX_BASIS_DIRS+1];
102 extern struct file_list *first_flist;
103 extern filter_rule_list daemon_filter_list;
107 int am_receiver = 0; /* Only set to 1 after the receiver/generator fork. */
108 int am_generator = 0; /* Only set to 1 after the receiver/generator fork. */
109 int local_server = 0;
110 int daemon_over_rsh = 0;
111 mode_t orig_umask = 0;
112 int batch_gen_fd = -1;
113 int sender_keeps_checksum = 0;
114 int raw_argc, cooked_argc;
115 char **raw_argv, **cooked_argv;
117 /* There's probably never more than at most 2 outstanding child processes,
118 * but set it higher, just in case. */
119 #define MAXCHILDPROCS 7
121 #ifdef HAVE_SIGACTION
122 # ifdef HAVE_SIGPROCMASK
123 # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
125 # define SIGACTMASK(n,h) SIGACTION(n,h)
127 static struct sigaction sigact;
133 } pid_stat_table[MAXCHILDPROCS];
135 static time_t starttime, endtime;
136 static int64 total_read, total_written;
138 static void show_malloc_stats(void);
140 /* Works like waitpid(), but if we already harvested the child pid in our
141 * remember_children(), we succeed instead of returning an error. */
142 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
147 waited_pid = waitpid(pid, status_ptr, flags);
148 } while (waited_pid == -1 && errno == EINTR);
150 if (waited_pid == -1 && errno == ECHILD) {
151 /* Status of requested child no longer available: check to
152 * see if it was processed by remember_children(). */
154 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
155 if (pid == pid_stat_table[cnt].pid) {
156 *status_ptr = pid_stat_table[cnt].status;
157 pid_stat_table[cnt].pid = 0;
166 int shell_exec(const char *cmd)
168 char *shell = getenv("RSYNC_SHELL");
175 if ((pid = fork()) < 0)
179 execlp(shell, shell, "-c", cmd, NULL);
183 int ret = wait_process(pid, &status, 0);
184 return ret < 0 ? -1 : status;
187 /* Wait for a process to exit, calling io_flush while waiting. */
188 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
193 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
195 io_flush(FULL_FLUSH);
198 /* TODO: If the child exited on a signal, then log an
199 * appropriate error message. Perhaps we should also accept a
200 * message describing the purpose of the child. Also indicate
201 * this to the caller so that they know something went wrong. */
202 if (waited_pid < 0) {
203 rsyserr(FERROR, errno, "waitpid");
204 *exit_code_ptr = RERR_WAITCHILD;
205 } else if (!WIFEXITED(status)) {
207 if (WCOREDUMP(status))
208 *exit_code_ptr = RERR_CRASHED;
211 if (WIFSIGNALED(status))
212 *exit_code_ptr = RERR_TERMINATED;
214 *exit_code_ptr = RERR_WAITCHILD;
216 *exit_code_ptr = WEXITSTATUS(status);
219 void write_del_stats(int f)
222 write_int(f, NDX_DEL_STATS);
224 write_ndx(f, NDX_DEL_STATS);
225 write_varint(f, stats.deleted_files - stats.deleted_dirs
226 - stats.deleted_symlinks - stats.deleted_devices
227 - stats.deleted_specials);
228 write_varint(f, stats.deleted_dirs);
229 write_varint(f, stats.deleted_symlinks);
230 write_varint(f, stats.deleted_devices);
231 write_varint(f, stats.deleted_specials);
234 void read_del_stats(int f)
236 stats.deleted_files = read_varint(f);
237 stats.deleted_files += stats.deleted_dirs = read_varint(f);
238 stats.deleted_files += stats.deleted_symlinks = read_varint(f);
239 stats.deleted_files += stats.deleted_devices = read_varint(f);
240 stats.deleted_files += stats.deleted_specials = read_varint(f);
243 static void become_copy_as_user()
252 if (DEBUG_GTE(CMD, 2))
253 rprintf(FINFO, "[%s] copy_as=%s\n", who_am_i(), copy_as);
255 if ((gname = strchr(copy_as, ':')) != NULL)
258 if (!user_to_uid(copy_as, &uid, True)) {
259 rprintf(FERROR, "Invalid copy-as user: %s\n", copy_as);
260 exit_cleanup(RERR_SYNTAX);
264 if (!group_to_gid(gname, &gid, True)) {
265 rprintf(FERROR, "Invalid copy-as group: %s\n", gname);
266 exit_cleanup(RERR_SYNTAX);
270 if ((pw = getpwuid(uid)) == NULL) {
271 rsyserr(FERROR, errno, "getpwuid failed");
272 exit_cleanup(RERR_SYNTAX);
277 if (setgid(gid) < 0) {
278 rsyserr(FERROR, errno, "setgid failed");
279 exit_cleanup(RERR_SYNTAX);
281 #ifdef HAVE_SETGROUPS
282 if (setgroups(1, &gid)) {
283 rsyserr(FERROR, errno, "setgroups failed");
284 exit_cleanup(RERR_SYNTAX);
287 #ifdef HAVE_INITGROUPS
288 if (!gname && initgroups(copy_as, gid) < 0) {
289 rsyserr(FERROR, errno, "initgroups failed");
290 exit_cleanup(RERR_SYNTAX);
299 rsyserr(FERROR, errno, "setuid failed");
300 exit_cleanup(RERR_SYNTAX);
305 am_root = (our_uid == ROOT_UID);
311 /* This function gets called from all 3 processes. We want the client side
312 * to actually output the text, but the sender is the only process that has
313 * all the stats we need. So, if we're a client sender, we do the report.
314 * If we're a server sender, we write the stats on the supplied fd. If
315 * we're the client receiver we read the stats from the supplied fd and do
316 * the report. All processes might also generate a set of debug stats, if
317 * the verbose level is high enough (this is the only thing that the
318 * generator process and the server receiver ever do here). */
319 static void handle_stats(int f)
321 endtime = time(NULL);
323 /* Cache two stats because the read/write code can change it. */
324 total_read = stats.total_read;
325 total_written = stats.total_written;
327 if (INFO_GTE(STATS, 3)) {
328 /* These come out from every process */
337 if (f == -1 || !am_sender)
343 write_varlong30(f, total_read, 3);
344 write_varlong30(f, total_written, 3);
345 write_varlong30(f, stats.total_size, 3);
346 if (protocol_version >= 29) {
347 write_varlong30(f, stats.flist_buildtime, 3);
348 write_varlong30(f, stats.flist_xfertime, 3);
354 /* this is the client */
356 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
358 else if (!am_sender) {
359 /* Read the first two in opposite order because the meaning of
360 * read/write swaps when switching from sender to receiver. */
361 total_written = read_varlong30(f, 3);
362 total_read = read_varlong30(f, 3);
363 stats.total_size = read_varlong30(f, 3);
364 if (protocol_version >= 29) {
365 stats.flist_buildtime = read_varlong30(f, 3);
366 stats.flist_xfertime = read_varlong30(f, 3);
368 } else if (write_batch) {
369 /* The --read-batch process is going to be a client
370 * receiver, so we need to give it the stats. */
371 write_varlong30(batch_fd, total_read, 3);
372 write_varlong30(batch_fd, total_written, 3);
373 write_varlong30(batch_fd, stats.total_size, 3);
374 if (protocol_version >= 29) {
375 write_varlong30(batch_fd, stats.flist_buildtime, 3);
376 write_varlong30(batch_fd, stats.flist_xfertime, 3);
381 static void output_itemized_counts(const char *prefix, int *counts)
383 static char *labels[] = { "reg", "dir", "link", "dev", "special" };
384 char buf[1024], *pre = " (";
386 int total = counts[0];
388 counts[0] -= counts[1] + counts[2] + counts[3] + counts[4];
389 for (j = 0; j < 5; j++) {
391 len += snprintf(buf+len, sizeof buf - len - 2,
393 pre, labels[j], comma_num(counts[j]));
400 rprintf(FINFO, "%s: %s%s\n", prefix, comma_num(total), buf);
403 static const char *bytes_per_sec_human_dnum(void)
405 if (starttime == (time_t)-1 || endtime == (time_t)-1)
407 return human_dnum((total_written + total_read) / (0.5 + (endtime - starttime)), 2);
410 static void output_summary(void)
412 if (INFO_GTE(STATS, 2)) {
413 rprintf(FCLIENT, "\n");
414 output_itemized_counts("Number of files", &stats.num_files);
415 if (protocol_version >= 29)
416 output_itemized_counts("Number of created files", &stats.created_files);
417 if (protocol_version >= 31)
418 output_itemized_counts("Number of deleted files", &stats.deleted_files);
419 rprintf(FINFO,"Number of regular files transferred: %s\n",
420 comma_num(stats.xferred_files));
421 rprintf(FINFO,"Total file size: %s bytes\n",
422 human_num(stats.total_size));
423 rprintf(FINFO,"Total transferred file size: %s bytes\n",
424 human_num(stats.total_transferred_size));
425 rprintf(FINFO,"Literal data: %s bytes\n",
426 human_num(stats.literal_data));
427 rprintf(FINFO,"Matched data: %s bytes\n",
428 human_num(stats.matched_data));
429 rprintf(FINFO,"File list size: %s\n",
430 human_num(stats.flist_size));
431 if (stats.flist_buildtime) {
433 "File list generation time: %s seconds\n",
434 comma_dnum((double)stats.flist_buildtime / 1000, 3));
436 "File list transfer time: %s seconds\n",
437 comma_dnum((double)stats.flist_xfertime / 1000, 3));
439 rprintf(FINFO,"Total bytes sent: %s\n",
440 human_num(total_written));
441 rprintf(FINFO,"Total bytes received: %s\n",
442 human_num(total_read));
445 if (INFO_GTE(STATS, 1)) {
446 rprintf(FCLIENT, "\n");
448 "sent %s bytes received %s bytes %s bytes/sec\n",
449 human_num(total_written), human_num(total_read),
450 bytes_per_sec_human_dnum());
451 rprintf(FINFO, "total size is %s speedup is %s%s\n",
452 human_num(stats.total_size),
453 comma_dnum((double)stats.total_size / (total_written+total_read), 2),
454 write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : "");
463 * If our C library can get malloc statistics, then show them to FINFO
465 static void show_malloc_stats(void)
472 rprintf(FCLIENT, "\n");
473 rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
474 (int)getpid(), am_server ? "server " : "",
475 am_daemon ? "daemon " : "", who_am_i());
476 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
478 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
480 rprintf(FINFO, " smblks: %10ld\n",
482 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
484 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
486 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
487 (long)mi.arena + mi.hblkhd);
488 rprintf(FINFO, " usmblks: %10ld\n",
490 rprintf(FINFO, " fsmblks: %10ld\n",
492 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
494 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
496 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
498 #endif /* HAVE_MALLINFO */
502 /* Start the remote shell. cmd may be NULL to use the default. */
503 static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc,
504 int *f_in_p, int *f_out_p)
507 char *args[MAX_ARGS], *need_to_free = NULL;
511 if (!read_batch && !local_server) {
512 char *t, *f, in_quote = '\0';
513 char *rsh_env = getenv(RSYNC_RSH_ENV);
518 cmd = need_to_free = strdup(cmd);
520 for (t = f = cmd; *f; f++) {
523 /* Comparison leaves rooms for server_options(). */
524 if (argc >= MAX_ARGS - MAX_SERVER_ARGS)
527 while (*f != ' ' || in_quote) {
531 "Missing trailing-%c in remote-shell command.\n",
533 exit_cleanup(RERR_SYNTAX);
538 if (*f == '\'' || *f == '"') {
543 if (*f == in_quote && *++f != in_quote) {
553 /* NOTE: must preserve t == start of command name until the end of the args handling! */
554 if ((t = strrchr(cmd, '/')) != NULL)
559 /* Check to see if we've already been given '-l user' in the remote-shell command. */
560 for (i = 0; i < argc-1; i++) {
561 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
566 /* remsh (on HPUX) takes the arguments the other way around */
567 args[argc++] = machine;
568 if (user && !(daemon_over_rsh && dash_l_set)) {
573 if (user && !(daemon_over_rsh && dash_l_set)) {
578 if (default_af_hint == AF_INET && strcmp(t, "ssh") == 0)
579 args[argc++] = "-4"; /* we're using ssh so we can add a -4 option */
582 if (default_af_hint == AF_INET6 && strcmp(t, "ssh") == 0)
583 args[argc++] = "-6"; /* we're using ssh so we can add a -6 option */
585 args[argc++] = machine;
588 args[argc++] = rsync_path;
590 if (blocking_io < 0 && (strcmp(t, "rsh") == 0 || strcmp(t, "remsh") == 0))
593 server_options(args, &argc);
595 if (argc >= MAX_ARGS - 2)
601 if (!daemon_over_rsh) {
602 while (remote_argc > 0) {
603 if (argc >= MAX_ARGS - 1) {
605 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
606 exit_cleanup(RERR_SYNTAX);
608 if (**remote_argv == '-') {
609 if (asprintf(args + argc++, "./%s", *remote_argv++) < 0)
610 out_of_memory("do_cmd");
612 args[argc++] = *remote_argv++;
619 if (DEBUG_GTE(CMD, 2)) {
620 for (i = 0; i < argc; i++)
621 rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]);
622 rprintf(FCLIENT, "\n");
626 int from_gen_pipe[2];
627 set_allow_inc_recurse();
628 if (fd_pair(from_gen_pipe) < 0) {
629 rsyserr(FERROR, errno, "pipe");
630 exit_cleanup(RERR_IPC);
632 batch_gen_fd = from_gen_pipe[0];
633 *f_out_p = from_gen_pipe[1];
635 pid = (pid_t)-1; /* no child pid */
639 } else if (local_server) {
640 /* If the user didn't request --[no-]whole-file, force
641 * it on, but only if we're not batch processing. */
642 if (whole_file < 0 && !write_batch)
644 set_allow_inc_recurse();
645 pid = local_child(argc, args, f_in_p, f_out_p, child_main);
650 pid = piped_child(args, f_in_p, f_out_p);
654 if (protect_args && !daemon_over_rsh)
655 send_protected_args(*f_out_p, args);
664 /* The receiving side operates in one of two modes:
666 * 1. it receives any number of files into a destination directory,
667 * placing them according to their names in the file-list.
669 * 2. it receives a single file and saves it using the name in the
670 * destination path instead of its file-list name. This requires a
671 * "local name" for writing out the destination file.
673 * So, our task is to figure out what mode/local-name we need.
674 * For mode 1, we change into the destination directory and return NULL.
675 * For mode 2, we change into the directory containing the destination
676 * file (if we aren't already there) and return the local-name. */
677 static char *get_local_name(struct file_list *flist, char *dest_path)
683 if (DEBUG_GTE(RECV, 1)) {
684 rprintf(FINFO, "get_local_name count=%d %s\n",
685 file_total, NS(dest_path));
688 if (!dest_path || list_only)
691 /* Treat an empty string as a copy into the current directory. */
695 if (daemon_filter_list.head) {
696 char *slash = strrchr(dest_path, '/');
697 if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0')))
701 if ((*dest_path != '.' || dest_path[1] != '\0')
702 && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0
703 || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) {
704 rprintf(FERROR, "ERROR: daemon has excluded destination \"%s\"\n",
706 exit_cleanup(RERR_FILESELECT);
712 /* See what currently exists at the destination. */
713 if ((statret = do_stat(dest_path, &st)) == 0) {
714 /* If the destination is a dir, enter it and use mode 1. */
715 if (S_ISDIR(st.st_mode)) {
716 if (!change_dir(dest_path, CD_NORMAL)) {
717 rsyserr(FERROR, errno, "change_dir#1 %s failed",
718 full_fname(dest_path));
719 exit_cleanup(RERR_FILESELECT);
721 filesystem_dev = st.st_dev; /* ensures --force works right w/-x */
724 if (file_total > 1) {
726 "ERROR: destination must be a directory when"
727 " copying more than 1 file\n");
728 exit_cleanup(RERR_FILESELECT);
730 if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) {
732 "ERROR: cannot overwrite non-directory"
733 " with a directory\n");
734 exit_cleanup(RERR_FILESELECT);
736 } else if (errno != ENOENT) {
737 /* If we don't know what's at the destination, fail. */
738 rsyserr(FERROR, errno, "ERROR: cannot stat destination %s",
739 full_fname(dest_path));
740 exit_cleanup(RERR_FILESELECT);
743 cp = strrchr(dest_path, '/');
745 /* If we need a destination directory because the transfer is not
746 * of a single non-directory or the user has requested one via a
747 * destination path ending in a slash, create one and use mode 1. */
748 if (file_total > 1 || (cp && !cp[1])) {
749 /* Lop off the final slash (if any). */
754 rprintf(FERROR, "ERROR: destination path is not a directory\n");
755 exit_cleanup(RERR_SYNTAX);
758 if (do_mkdir(dest_path, ACCESSPERMS) != 0) {
759 rsyserr(FERROR, errno, "mkdir %s failed",
760 full_fname(dest_path));
761 exit_cleanup(RERR_FILEIO);
764 if (flist->high >= flist->low
765 && strcmp(flist->files[flist->low]->basename, ".") == 0)
766 flist->files[0]->flags |= FLAG_DIR_CREATED;
768 if (INFO_GTE(NAME, 1))
769 rprintf(FINFO, "created directory %s\n", dest_path);
772 /* Indicate that dest dir doesn't really exist. */
776 if (!change_dir(dest_path, dry_run > 1 ? CD_SKIP_CHDIR : CD_NORMAL)) {
777 rsyserr(FERROR, errno, "change_dir#2 %s failed",
778 full_fname(dest_path));
779 exit_cleanup(RERR_FILESELECT);
785 /* Otherwise, we are writing a single file, possibly on top of an
786 * existing non-directory. Change to the item's parent directory
787 * (if it has a path component), return the basename of the
788 * destination file as the local name, and use mode 2. */
796 if (!change_dir(dest_path, CD_NORMAL)) {
797 rsyserr(FERROR, errno, "change_dir#3 %s failed",
798 full_fname(dest_path));
799 exit_cleanup(RERR_FILESELECT);
806 /* This function checks on our alternate-basis directories. If we're in
807 * dry-run mode and the destination dir does not yet exist, we'll try to
808 * tweak any dest-relative paths to make them work for a dry-run (the
809 * destination dir must be in curr_dir[] when this function is called).
810 * We also warn about any arg that is non-existent or not a directory. */
811 static void check_alt_basis_dirs(void)
814 char *slash = strrchr(curr_dir, '/');
817 for (j = 0; j < basis_dir_cnt; j++) {
818 char *bdir = basis_dir[j];
819 int bd_len = strlen(bdir);
820 if (bd_len > 1 && bdir[bd_len-1] == '/')
821 bdir[--bd_len] = '\0';
822 if (dry_run > 1 && *bdir != '/') {
823 int len = curr_dir_len + 1 + bd_len + 1;
824 char *new = new_array(char, len);
825 if (slash && strncmp(bdir, "../", 3) == 0) {
826 /* We want to remove only one leading "../" prefix for
827 * the directory we couldn't create in dry-run mode:
828 * this ensures that any other ".." references get
829 * evaluated the same as they would for a live copy. */
831 pathjoin(new, len, curr_dir, bdir + 3);
834 pathjoin(new, len, curr_dir, bdir);
835 basis_dir[j] = bdir = new;
837 if (do_stat(bdir, &st) < 0)
838 rprintf(FWARNING, "%s arg does not exist: %s\n", alt_dest_opt(0), bdir);
839 else if (!S_ISDIR(st.st_mode))
840 rprintf(FWARNING, "%s arg is not a dir: %s\n", alt_dest_opt(0), bdir);
844 /* This is only called by the sender. */
845 static void read_final_goodbye(int f_in, int f_out)
849 char xname[MAXPATHLEN];
851 shutting_down = True;
853 if (protocol_version < 29)
856 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
857 if (protocol_version >= 31 && i == NDX_DONE) {
859 write_ndx(f_out, NDX_DONE);
861 if (batch_gen_fd >= 0) {
862 while (read_int(batch_gen_fd) != NDX_DEL_STATS) {}
863 read_del_stats(batch_gen_fd);
865 write_int(f_out, NDX_DONE);
867 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
872 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
874 exit_cleanup(RERR_PROTOCOL);
878 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
880 struct file_list *flist;
883 if (DEBUG_GTE(SEND, 1))
884 rprintf(FINFO, "server_sender starting pid=%d\n", (int)getpid());
886 if (am_daemon && lp_write_only(module_id)) {
887 rprintf(FERROR, "ERROR: module is write only\n");
888 exit_cleanup(RERR_SYNTAX);
890 if (am_daemon && read_only && remove_source_files) {
892 "ERROR: --remove-%s-files cannot be used with a read-only module\n",
893 remove_source_files == 1 ? "source" : "sent");
894 exit_cleanup(RERR_SYNTAX);
897 rprintf(FERROR, "ERROR: do_server_sender called without args\n");
898 exit_cleanup(RERR_SYNTAX);
901 become_copy_as_user();
904 if (!relative_paths) {
905 if (!change_dir(dir, CD_NORMAL)) {
906 rsyserr(FERROR, errno, "change_dir#3 %s failed",
908 exit_cleanup(RERR_FILESELECT);
914 if (argc == 0 && (recurse || xfer_dirs || list_only)) {
920 flist = send_file_list(f_out,argc,argv);
921 if (!flist || flist->used == 0) {
922 /* Make sure input buffering is off so we can't hang in noop_io_until_death(). */
923 io_end_buffering_in(0);
924 /* TODO: we should really exit in a more controlled manner. */
928 io_start_buffering_in(f_in);
930 send_files(f_in, f_out);
931 io_flush(FULL_FLUSH);
933 if (protocol_version >= 24)
934 read_final_goodbye(f_in, f_out);
935 io_flush(FULL_FLUSH);
940 static int do_recv(int f_in, int f_out, char *local_name)
946 /* The receiving side mustn't obey this, or an existing symlink that
947 * points to an identical file won't be replaced by the referent. */
948 copy_links = copy_dirlinks = copy_unsafe_links = 0;
950 #ifdef SUPPORT_HARD_LINKS
951 if (preserve_hard_links && !inc_recurse)
952 match_hard_links(first_flist);
955 if (fd_pair(error_pipe) < 0) {
956 rsyserr(FERROR, errno, "pipe failed in do_recv");
957 exit_cleanup(RERR_IPC);
963 if (backup_dir_len > 1)
964 backup_dir_buf[backup_dir_len-1] = '\0';
965 ret = do_stat(backup_dir_buf, &st);
966 if (ret != 0 || !S_ISDIR(st.st_mode)) {
968 rprintf(FERROR, "The backup-dir is not a directory: %s\n", backup_dir_buf);
969 exit_cleanup(RERR_SYNTAX);
971 if (errno != ENOENT) {
972 rprintf(FERROR, "Failed to stat %s: %s\n", backup_dir_buf, strerror(errno));
973 exit_cleanup(RERR_FILEIO);
975 if (INFO_GTE(BACKUP, 1))
976 rprintf(FINFO, "(new) backup_dir is %s\n", backup_dir_buf);
977 } else if (INFO_GTE(BACKUP, 1))
978 rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
979 if (backup_dir_len > 1)
980 backup_dir_buf[backup_dir_len-1] = '/';
983 io_flush(FULL_FLUSH);
985 if ((pid = do_fork()) == -1) {
986 rsyserr(FERROR, errno, "fork failed in do_recv");
987 exit_cleanup(RERR_IPC);
992 send_msgs_to_gen = am_server;
994 close(error_pipe[0]);
996 /* We can't let two processes write to the socket at one time. */
997 io_end_multiplex_out(MPLX_SWITCHING);
1001 f_out = error_pipe[1];
1003 bwlimit_writemax = 0; /* receiver doesn't need to do this */
1006 io_start_buffering_in(f_in);
1007 io_start_multiplex_out(f_out);
1009 recv_files(f_in, f_out, local_name);
1010 io_flush(FULL_FLUSH);
1013 if (output_needs_newline) {
1014 fputc('\n', stdout);
1015 output_needs_newline = 0;
1018 write_int(f_out, NDX_DONE);
1019 send_msg(MSG_STATS, (char*)&stats.total_read, sizeof stats.total_read, 0);
1020 io_flush(FULL_FLUSH);
1022 /* Handle any keep-alive packets from the post-processing work
1023 * that the generator does. */
1024 if (protocol_version >= 29) {
1025 kluge_around_eof = -1;
1027 /* This should only get stopped via a USR2 signal. */
1028 read_final_goodbye(f_in, f_out);
1030 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
1032 exit_cleanup(RERR_PROTOCOL);
1035 /* Finally, we go to sleep until our parent kills us with a
1036 * USR2 signal. We sleep for a short time, as on some OSes
1037 * a signal won't interrupt a sleep! */
1043 flist_receiving_enabled = True;
1045 io_end_multiplex_in(MPLX_SWITCHING);
1046 if (write_batch && !am_server)
1049 close(error_pipe[1]);
1053 f_in = error_pipe[0];
1055 io_start_buffering_out(f_out);
1056 io_start_multiplex_in(f_in);
1058 #ifdef SUPPORT_HARD_LINKS
1059 if (preserve_hard_links && inc_recurse) {
1060 struct file_list *flist;
1061 for (flist = first_flist; flist; flist = flist->next)
1062 match_hard_links(flist);
1066 generate_files(f_out, local_name);
1069 io_flush(FULL_FLUSH);
1070 shutting_down = True;
1071 if (protocol_version >= 24) {
1072 /* send a final goodbye message */
1073 write_ndx(f_out, NDX_DONE);
1075 io_flush(FULL_FLUSH);
1078 wait_process_with_flush(pid, &exit_code);
1082 static void do_server_recv(int f_in, int f_out, int argc, char *argv[])
1085 struct file_list *flist;
1086 char *local_name = NULL;
1089 if (filesfrom_fd >= 0 && msgs2stderr != 1 && protocol_version < 31) {
1090 /* We can't mix messages with files-from data on the socket,
1091 * so temporarily turn off info/debug messages. */
1092 negate_output_levels();
1097 if (DEBUG_GTE(RECV, 1))
1098 rprintf(FINFO, "server_recv(%d) starting pid=%d\n", argc, (int)getpid());
1100 if (am_daemon && read_only) {
1101 rprintf(FERROR,"ERROR: module is read only\n");
1102 exit_cleanup(RERR_SYNTAX);
1106 become_copy_as_user();
1109 char *dir = argv[0];
1112 if (!am_daemon && !change_dir(dir, CD_NORMAL)) {
1113 rsyserr(FERROR, errno, "change_dir#4 %s failed",
1115 exit_cleanup(RERR_FILESELECT);
1119 if (protocol_version >= 30)
1120 io_start_multiplex_in(f_in);
1122 io_start_buffering_in(f_in);
1123 recv_filter_list(f_in);
1125 if (filesfrom_fd >= 0) {
1126 /* We need to send the files-from names to the sender at the
1127 * same time that we receive the file-list from them, so we
1128 * need the IO routines to automatically write out the names
1129 * onto our f_out socket as we read the file-list. This
1130 * avoids both deadlock and extra delays/buffers. */
1131 start_filesfrom_forwarding(filesfrom_fd);
1135 flist = recv_file_list(f_in, -1);
1137 rprintf(FERROR,"server_recv: recv_file_list error\n");
1138 exit_cleanup(RERR_FILESELECT);
1140 if (inc_recurse && file_total == 1)
1141 recv_additional_file_list(f_in);
1144 negate_output_levels();
1147 local_name = get_local_name(flist,argv[0]);
1149 /* Now that we know what our destination directory turned out to be,
1150 * we can sanitize the --link-/copy-/compare-dest args correctly. */
1151 if (sanitize_paths) {
1153 for (dir_p = basis_dir; *dir_p; dir_p++)
1154 *dir_p = sanitize_path(NULL, *dir_p, NULL, curr_dir_depth, SP_DEFAULT);
1156 partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, SP_DEFAULT);
1158 check_alt_basis_dirs();
1160 if (daemon_filter_list.head) {
1162 filter_rule_list *elp = &daemon_filter_list;
1164 for (dir_p = basis_dir; *dir_p; dir_p++) {
1167 dir += module_dirlen;
1168 if (check_filter(elp, FLOG, dir, 1) < 0)
1169 goto options_rejected;
1171 if (partial_dir && *partial_dir == '/'
1172 && check_filter(elp, FLOG, partial_dir + module_dirlen, 1) < 0) {
1174 rprintf(FERROR, "Your options have been rejected by the server.\n");
1175 exit_cleanup(RERR_SYNTAX);
1179 exit_code = do_recv(f_in, f_out, local_name);
1180 exit_cleanup(exit_code);
1184 int child_main(int argc, char *argv[])
1186 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1191 void start_server(int f_in, int f_out, int argc, char *argv[])
1193 set_nonblocking(f_in);
1194 set_nonblocking(f_out);
1196 io_set_sock_fds(f_in, f_out);
1197 setup_protocol(f_out, f_in);
1199 if (protocol_version >= 23)
1200 io_start_multiplex_out(f_out);
1201 if (am_daemon && io_timeout && protocol_version >= 31)
1202 send_msg_int(MSG_IO_TIMEOUT, io_timeout);
1205 keep_dirlinks = 0; /* Must be disabled on the sender. */
1206 if (need_messages_from_generator)
1207 io_start_multiplex_in(f_in);
1209 io_start_buffering_in(f_in);
1210 recv_filter_list(f_in);
1211 do_server_sender(f_in, f_out, argc, argv);
1213 do_server_recv(f_in, f_out, argc, argv);
1217 /* This is called once the connection has been negotiated. It is used
1218 * for rsyncd, remote-shell, and local connections. */
1219 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
1221 struct file_list *flist = NULL;
1222 int exit_code = 0, exit_code2 = 0;
1223 char *local_name = NULL;
1225 cleanup_child_pid = pid;
1227 set_nonblocking(f_in);
1228 set_nonblocking(f_out);
1231 io_set_sock_fds(f_in, f_out);
1232 setup_protocol(f_out,f_in);
1234 /* We set our stderr file handle to blocking because ssh might have
1235 * set it to non-blocking. This can be particularly troublesome if
1236 * stderr is a clone of stdout, because ssh would have set our stdout
1237 * to non-blocking at the same time (which can easily cause us to lose
1238 * output from our print statements). This kluge shouldn't cause ssh
1239 * any problems for how we use it. Note also that we delayed setting
1240 * this until after the above protocol setup so that we know for sure
1241 * that ssh is done twiddling its file descriptors. */
1242 set_blocking(STDERR_FILENO);
1245 keep_dirlinks = 0; /* Must be disabled on the sender. */
1248 && (log_format_has(stdout_format, 'C')
1249 || log_format_has(logfile_format, 'C')))
1250 sender_keeps_checksum = 1;
1252 if (protocol_version >= 30)
1253 io_start_multiplex_out(f_out);
1255 io_start_buffering_out(f_out);
1256 if (protocol_version >= 31 || (!filesfrom_host && protocol_version >= 23))
1257 io_start_multiplex_in(f_in);
1259 io_start_buffering_in(f_in);
1260 send_filter_list(f_out);
1262 filesfrom_fd = f_in;
1264 if (write_batch && !am_server)
1265 start_write_batch(f_out);
1267 become_copy_as_user();
1269 flist = send_file_list(f_out, argc, argv);
1270 if (DEBUG_GTE(FLIST, 3))
1271 rprintf(FINFO,"file list sent\n");
1273 if (protocol_version < 31 && filesfrom_host && protocol_version >= 23)
1274 io_start_multiplex_in(f_in);
1276 io_flush(NORMAL_FLUSH);
1277 send_files(f_in, f_out);
1278 io_flush(FULL_FLUSH);
1280 if (protocol_version >= 24)
1281 read_final_goodbye(f_in, f_out);
1283 if (DEBUG_GTE(EXIT, 2))
1284 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
1285 io_flush(FULL_FLUSH);
1286 wait_process_with_flush(pid, &exit_code);
1289 io_flush(FULL_FLUSH);
1290 exit_cleanup(exit_code);
1294 if (protocol_version >= 23)
1295 io_start_multiplex_in(f_in);
1296 if (need_messages_from_generator)
1297 io_start_multiplex_out(f_out);
1299 io_start_buffering_out(f_out);
1302 become_copy_as_user();
1304 send_filter_list(read_batch ? -1 : f_out);
1306 if (filesfrom_fd >= 0) {
1307 start_filesfrom_forwarding(filesfrom_fd);
1311 if (write_batch && !am_server)
1312 start_write_batch(f_in);
1313 flist = recv_file_list(f_in, -1);
1314 if (inc_recurse && file_total == 1)
1315 recv_additional_file_list(f_in);
1317 if (flist && flist->used > 0) {
1318 local_name = get_local_name(flist, argv[0]);
1320 check_alt_basis_dirs();
1322 exit_code2 = do_recv(f_in, f_out, local_name);
1329 if (DEBUG_GTE(RECV, 1))
1330 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
1331 io_flush(FULL_FLUSH);
1332 wait_process_with_flush(pid, &exit_code);
1335 return MAX(exit_code, exit_code2);
1338 static void dup_argv(char *argv[])
1342 for (i = 0; argv[i]; i++)
1343 argv[i] = strdup(argv[i]);
1347 /* Start a client for either type of remote connection. Work out
1348 * whether the arguments request a remote shell or rsyncd connection,
1349 * and call the appropriate connection function, then run_client.
1351 * Calls either start_socket_client (for sockets) or do_cmd and
1352 * client_run (for ssh). */
1353 static int start_client(int argc, char *argv[])
1355 char *p, *shell_machine = NULL, *shell_user = NULL;
1357 int remote_argc, env_port = rsync_port;
1362 /* Don't clobber argv[] so that ps(1) can still show the right
1366 if (!read_batch) { /* for read_batch, NO source is specified */
1367 char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1368 if (path) { /* source is remote */
1375 if (argc == 1 || **argv == ':')
1376 argc = 0; /* no dest arg */
1377 else if (check_for_hostspec(*argv, &dummy_host, &dummy_port)) {
1379 "The source and destination cannot both be remote.\n");
1380 exit_cleanup(RERR_SYNTAX);
1382 remote_argc--; /* don't count dest */
1385 if (filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) {
1387 "--files-from hostname is not the same as the transfer hostname\n");
1388 exit_cleanup(RERR_SYNTAX);
1392 daemon_over_rsh = shell_cmd ? 1 : -1;
1393 } else { /* source is local, check dest arg */
1398 remote_argv = argv + argc;
1400 static char *dotarg[1] = { "." };
1402 remote_argv = dotarg;
1406 path = check_for_hostspec(p, &shell_machine, &rsync_port);
1407 if (path && filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) {
1409 "--files-from hostname is not the same as the transfer hostname\n");
1410 exit_cleanup(RERR_SYNTAX);
1412 if (!path) { /* no hostspec found, so src & dest are local */
1414 if (filesfrom_host) {
1416 "--files-from cannot be remote when the transfer is local\n");
1417 exit_cleanup(RERR_SYNTAX);
1419 shell_machine = NULL;
1421 } else { /* hostspec was found, so dest is remote */
1424 daemon_over_rsh = shell_cmd ? 1 : -1;
1427 } else { /* read_batch */
1429 if (check_for_hostspec(argv[argc-1], &shell_machine, &rsync_port)) {
1430 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1431 exit_cleanup(RERR_SYNTAX);
1433 remote_argv = argv += argc - 1;
1434 remote_argc = argc = 1;
1438 if (!rsync_port && remote_argc && !**remote_argv) /* Turn an empty arg into a dot dir. */
1443 int dummy_port = rsync_port;
1445 /* For local source, extra source args must not have hostspec. */
1446 for (i = 1; i < argc; i++) {
1447 if (check_for_hostspec(argv[i], &dummy_host, &dummy_port)) {
1448 rprintf(FERROR, "Unexpected remote arg: %s\n", argv[i]);
1449 exit_cleanup(RERR_SYNTAX);
1454 int dummy_port = rsync_port;
1456 /* For remote source, any extra source args must have either
1457 * the same hostname or an empty hostname. */
1458 for (i = 1; i < remote_argc; i++) {
1459 char *arg = check_for_hostspec(remote_argv[i], &dummy_host, &dummy_port);
1461 rprintf(FERROR, "Unexpected local arg: %s\n", remote_argv[i]);
1462 rprintf(FERROR, "If arg is a remote file/dir, prefix it with a colon (:).\n");
1463 exit_cleanup(RERR_SYNTAX);
1465 if (*dummy_host && strcmp(dummy_host, shell_machine) != 0) {
1466 rprintf(FERROR, "All source args must come from the same machine.\n");
1467 exit_cleanup(RERR_SYNTAX);
1469 if (rsync_port != dummy_port) {
1470 if (!rsync_port || !dummy_port)
1471 rprintf(FERROR, "All source args must use the same hostspec format.\n");
1473 rprintf(FERROR, "All source args must use the same port number.\n");
1474 exit_cleanup(RERR_SYNTAX);
1476 if (!rsync_port && !*arg) /* Turn an empty arg into a dot dir. */
1478 remote_argv[i] = arg;
1483 rsync_port = RSYNC_PORT;
1485 env_port = rsync_port;
1487 if (daemon_over_rsh < 0)
1488 return start_socket_client(shell_machine, remote_argc, remote_argv, argc, argv);
1490 if (password_file && !daemon_over_rsh) {
1491 rprintf(FERROR, "The --password-file option may only be "
1492 "used when accessing an rsync daemon.\n");
1493 exit_cleanup(RERR_SYNTAX);
1496 if (connect_timeout) {
1497 rprintf(FERROR, "The --contimeout option may only be "
1498 "used when connecting to an rsync daemon.\n");
1499 exit_cleanup(RERR_SYNTAX);
1502 if (shell_machine) {
1503 p = strrchr(shell_machine,'@');
1506 shell_user = shell_machine;
1507 shell_machine = p+1;
1511 if (DEBUG_GTE(CMD, 2)) {
1512 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1513 NS(shell_cmd), NS(shell_machine), NS(shell_user),
1514 NS(remote_argv[0]));
1518 if (daemon_over_rsh)
1519 set_env_num("RSYNC_PORT", env_port);
1522 pid = do_cmd(shell_cmd, shell_machine, shell_user, remote_argv, remote_argc, &f_in, &f_out);
1524 /* if we're running an rsync server on the remote host over a
1525 * remote shell command, we need to do the RSYNCD protocol first */
1526 if (daemon_over_rsh) {
1528 tmpret = start_inband_exchange(f_in, f_out, shell_user, remote_argc, remote_argv);
1533 ret = client_run(f_in, f_out, pid, argc, argv);
1542 static void sigusr1_handler(UNUSED(int val))
1544 called_from_signal_handler = 1;
1545 exit_cleanup(RERR_SIGNAL1);
1548 static void sigusr2_handler(UNUSED(int val))
1554 _exit(RERR_PARTIAL);
1558 #if defined SIGINFO || defined SIGVTALRM
1559 static void siginfo_handler(UNUSED(int val))
1561 if (!am_server && !INFO_GTE(PROGRESS, 1))
1562 want_progress_now = True;
1566 void remember_children(UNUSED(int val))
1571 /* An empty waitpid() loop was put here by Tridge and we could never
1572 * get him to explain why he put it in, so rather than taking it
1573 * out we're instead saving the child exit statuses for later use.
1574 * The waitpid() loop presumably eliminates all possibility of leaving
1575 * zombie children, maybe that's why he did it. */
1576 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1577 /* save the child's exit status */
1578 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1579 if (pid_stat_table[cnt].pid == 0) {
1580 pid_stat_table[cnt].pid = pid;
1581 pid_stat_table[cnt].status = status;
1587 #ifndef HAVE_SIGACTION
1588 signal(SIGCHLD, remember_children);
1594 * This routine catches signals and tries to send them to gdb.
1596 * Because it's called from inside a signal handler it ought not to
1597 * use too many library routines.
1599 * @todo Perhaps use "screen -X" instead/as well, to help people
1600 * debugging without easy access to X. Perhaps use an environment
1601 * variable, or just call a script?
1603 * @todo The /proc/ magic probably only works on Linux (and
1604 * Solaris?) Can we be more portable?
1606 #ifdef MAINTAINER_MODE
1607 const char *get_panic_action(void)
1609 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1613 return "xterm -display :0 -T Panic -n Panic -e gdb /proc/%d/exe %d";
1618 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1620 * This signal handler is only installed if we were configured with
1621 * --enable-maintainer-mode. Perhaps it should always be on and we
1622 * should just look at the environment variable, but I'm a bit leery
1623 * of a signal sending us into a busy loop.
1625 static void rsync_panic_handler(UNUSED(int whatsig))
1628 int ret, pid_int = getpid();
1630 snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(), pid_int, pid_int);
1632 /* Unless we failed to execute gdb, we allow the process to
1633 * continue. I'm not sure if that's right. */
1634 ret = shell_exec(cmd_buf);
1641 int main(int argc,char *argv[])
1648 #ifdef HAVE_SIGACTION
1649 # ifdef HAVE_SIGPROCMASK
1652 sigemptyset(&sigmask);
1654 sigact.sa_flags = SA_NOCLDSTOP;
1656 SIGACTMASK(SIGUSR1, sigusr1_handler);
1657 SIGACTMASK(SIGUSR2, sigusr2_handler);
1658 SIGACTMASK(SIGCHLD, remember_children);
1659 #ifdef MAINTAINER_MODE
1660 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1661 SIGACTMASK(SIGFPE, rsync_panic_handler);
1662 SIGACTMASK(SIGABRT, rsync_panic_handler);
1663 SIGACTMASK(SIGBUS, rsync_panic_handler);
1666 SIGACTMASK(SIGINFO, siginfo_handler);
1669 SIGACTMASK(SIGVTALRM, siginfo_handler);
1672 starttime = time(NULL);
1675 am_root = our_uid == ROOT_UID;
1677 memset(&stats, 0, sizeof(stats));
1679 /* Even a non-daemon runs needs the default config values to be set, e.g.
1680 * lp_dont_compress() is queried when no --skip-compress option is set. */
1681 reset_daemon_vars();
1685 exit_cleanup(RERR_SYNTAX);
1688 /* Get the umask for use in permission calculations. We no longer set
1689 * it to zero; that is ugly and pointless now that all the callers that
1690 * relied on it have been reeducated to work with default ACLs. */
1691 umask(orig_umask = umask(0));
1693 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1694 setlocale(LC_CTYPE, "");
1697 if (!parse_arguments(&argc, (const char ***) &argv)) {
1699 exit_cleanup(RERR_SYNTAX);
1702 && poptDupArgv(argc, (const char **)argv, &cooked_argc, (const char ***)&cooked_argv) != 0)
1703 out_of_memory("main");
1705 SIGACTMASK(SIGINT, sig_int);
1706 SIGACTMASK(SIGHUP, sig_int);
1707 SIGACTMASK(SIGTERM, sig_int);
1708 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1709 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1712 /* Ignore SIGPIPE; we consistently check error codes and will
1714 SIGACTION(SIGPIPE, SIG_IGN);
1716 SIGACTION(SIGXFSZ, SIG_IGN);
1719 /* Initialize change_dir() here because on some old systems getcwd
1720 * (implemented by forking "pwd" and reading its output) doesn't
1721 * work when there are other child processes. Also, on all systems
1722 * that implement getcwd that way "pwd" can't be found after chroot. */
1723 change_dir(NULL, CD_NORMAL);
1725 if ((write_batch || read_batch) && !am_server) {
1726 open_batch_files(); /* sets batch_fd */
1728 read_stream_flags(batch_fd);
1730 write_stream_flags(batch_fd);
1732 if (write_batch < 0)
1739 } else if (am_daemon)
1740 return daemon_main();
1742 if (am_server && protect_args) {
1743 char buf[MAXPATHLEN];
1745 read_args(STDIN_FILENO, NULL, buf, sizeof buf, 1, &argv, &argc, NULL);
1746 if (!parse_arguments(&argc, (const char ***) &argv)) {
1748 exit_cleanup(RERR_SYNTAX);
1754 exit_cleanup(RERR_SYNTAX);
1758 set_nonblocking(STDIN_FILENO);
1759 set_nonblocking(STDOUT_FILENO);
1761 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1762 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1765 ret = start_client(argc, argv);
1767 exit_cleanup(RERR_STARTCLIENT);