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.
26 #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H
33 extern int io_timeout;
38 extern int inc_recurse;
39 extern int blocking_io;
40 extern int always_checksum;
41 extern int remove_source_files;
42 extern int output_needs_newline;
43 extern int called_from_signal_handler;
44 extern int need_messages_from_generator;
45 extern int kluge_around_eof;
46 extern int got_xfer_error;
47 extern int msgs2stderr;
50 extern int copy_links;
51 extern int copy_dirlinks;
52 extern int copy_unsafe_links;
53 extern int keep_dirlinks;
54 extern int preserve_hard_links;
55 extern int protocol_version;
56 extern int file_total;
59 extern int protect_args;
60 extern int relative_paths;
61 extern int sanitize_paths;
62 extern int curr_dir_depth;
63 extern int curr_dir_len;
65 extern int rsync_port;
66 extern int whole_file;
67 extern int read_batch;
68 extern int write_batch;
71 extern int sock_f_out;
72 extern int filesfrom_fd;
73 extern int connect_timeout;
74 extern int send_msgs_to_gen;
75 extern dev_t filesystem_dev;
76 extern pid_t cleanup_child_pid;
77 extern size_t bwlimit_writemax;
78 extern unsigned int module_dirlen;
79 extern BOOL flist_receiving_enabled;
80 extern BOOL want_progress_now;
81 extern BOOL shutting_down;
82 extern int backup_dir_len;
83 extern int basis_dir_cnt;
84 extern struct stats stats;
85 extern char *stdout_format;
86 extern char *logfile_format;
87 extern char *filesfrom_host;
88 extern char *partial_dir;
89 extern char *rsync_path;
90 extern char *shell_cmd;
91 extern char *password_file;
92 extern char *backup_dir;
94 extern char curr_dir[MAXPATHLEN];
95 extern char backup_dir_buf[MAXPATHLEN];
96 extern char *basis_dir[MAX_BASIS_DIRS+1];
97 extern struct file_list *first_flist;
98 extern filter_rule_list daemon_filter_list;
102 int am_receiver = 0; /* Only set to 1 after the receiver/generator fork. */
103 int am_generator = 0; /* Only set to 1 after the receiver/generator fork. */
104 int local_server = 0;
105 int daemon_over_rsh = 0;
106 mode_t orig_umask = 0;
107 int batch_gen_fd = -1;
108 int sender_keeps_checksum = 0;
109 int raw_argc, cooked_argc;
110 char **raw_argv, **cooked_argv;
112 /* There's probably never more than at most 2 outstanding child processes,
113 * but set it higher, just in case. */
114 #define MAXCHILDPROCS 7
116 #ifdef HAVE_SIGACTION
117 # ifdef HAVE_SIGPROCMASK
118 # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
120 # define SIGACTMASK(n,h) SIGACTION(n,h)
122 static struct sigaction sigact;
128 } pid_stat_table[MAXCHILDPROCS];
130 static time_t starttime, endtime;
131 static int64 total_read, total_written;
133 static void show_malloc_stats(void);
135 /* Works like waitpid(), but if we already harvested the child pid in our
136 * remember_children(), we succeed instead of returning an error. */
137 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
142 waited_pid = waitpid(pid, status_ptr, flags);
143 } while (waited_pid == -1 && errno == EINTR);
145 if (waited_pid == -1 && errno == ECHILD) {
146 /* Status of requested child no longer available: check to
147 * see if it was processed by remember_children(). */
149 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
150 if (pid == pid_stat_table[cnt].pid) {
151 *status_ptr = pid_stat_table[cnt].status;
152 pid_stat_table[cnt].pid = 0;
161 int shell_exec(const char *cmd)
163 char *shell = getenv("RSYNC_SHELL");
170 if ((pid = fork()) < 0)
174 execlp(shell, shell, "-c", cmd, NULL);
178 int ret = wait_process(pid, &status, 0);
179 return ret < 0 ? -1 : status;
182 /* Wait for a process to exit, calling io_flush while waiting. */
183 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
188 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
190 io_flush(FULL_FLUSH);
193 /* TODO: If the child exited on a signal, then log an
194 * appropriate error message. Perhaps we should also accept a
195 * message describing the purpose of the child. Also indicate
196 * this to the caller so that they know something went wrong. */
197 if (waited_pid < 0) {
198 rsyserr(FERROR, errno, "waitpid");
199 *exit_code_ptr = RERR_WAITCHILD;
200 } else if (!WIFEXITED(status)) {
202 if (WCOREDUMP(status))
203 *exit_code_ptr = RERR_CRASHED;
206 if (WIFSIGNALED(status))
207 *exit_code_ptr = RERR_TERMINATED;
209 *exit_code_ptr = RERR_WAITCHILD;
211 *exit_code_ptr = WEXITSTATUS(status);
214 void write_del_stats(int f)
217 write_int(f, NDX_DEL_STATS);
219 write_ndx(f, NDX_DEL_STATS);
220 write_varint(f, stats.deleted_files - stats.deleted_dirs
221 - stats.deleted_symlinks - stats.deleted_devices
222 - stats.deleted_specials);
223 write_varint(f, stats.deleted_dirs);
224 write_varint(f, stats.deleted_symlinks);
225 write_varint(f, stats.deleted_devices);
226 write_varint(f, stats.deleted_specials);
229 void read_del_stats(int f)
231 stats.deleted_files = read_varint(f);
232 stats.deleted_files += stats.deleted_dirs = read_varint(f);
233 stats.deleted_files += stats.deleted_symlinks = read_varint(f);
234 stats.deleted_files += stats.deleted_devices = read_varint(f);
235 stats.deleted_files += stats.deleted_specials = read_varint(f);
238 static void become_copy_as_user()
247 if (DEBUG_GTE(CMD, 2))
248 rprintf(FINFO, "[%s] copy_as=%s\n", who_am_i(), copy_as);
250 if ((gname = strchr(copy_as, ':')) != NULL)
253 if (!user_to_uid(copy_as, &uid, True)) {
254 rprintf(FERROR, "Invalid copy-as user: %s\n", copy_as);
255 exit_cleanup(RERR_SYNTAX);
259 if (!group_to_gid(gname, &gid, True)) {
260 rprintf(FERROR, "Invalid copy-as group: %s\n", gname);
261 exit_cleanup(RERR_SYNTAX);
265 if ((pw = getpwuid(uid)) == NULL) {
266 rsyserr(FERROR, errno, "getpwuid failed");
267 exit_cleanup(RERR_SYNTAX);
272 if (setgid(gid) < 0) {
273 rsyserr(FERROR, errno, "setgid failed");
274 exit_cleanup(RERR_SYNTAX);
276 #ifdef HAVE_SETGROUPS
277 if (setgroups(1, &gid)) {
278 rsyserr(FERROR, errno, "setgroups failed");
279 exit_cleanup(RERR_SYNTAX);
282 #ifdef HAVE_INITGROUPS
283 if (!gname && initgroups(copy_as, gid) < 0) {
284 rsyserr(FERROR, errno, "initgroups failed");
285 exit_cleanup(RERR_SYNTAX);
294 rsyserr(FERROR, errno, "setuid failed");
295 exit_cleanup(RERR_SYNTAX);
300 am_root = (our_uid == 0);
306 /* This function gets called from all 3 processes. We want the client side
307 * to actually output the text, but the sender is the only process that has
308 * all the stats we need. So, if we're a client sender, we do the report.
309 * If we're a server sender, we write the stats on the supplied fd. If
310 * we're the client receiver we read the stats from the supplied fd and do
311 * the report. All processes might also generate a set of debug stats, if
312 * the verbose level is high enough (this is the only thing that the
313 * generator process and the server receiver ever do here). */
314 static void handle_stats(int f)
316 endtime = time(NULL);
318 /* Cache two stats because the read/write code can change it. */
319 total_read = stats.total_read;
320 total_written = stats.total_written;
322 if (INFO_GTE(STATS, 3)) {
323 /* These come out from every process */
332 if (f == -1 || !am_sender)
338 write_varlong30(f, total_read, 3);
339 write_varlong30(f, total_written, 3);
340 write_varlong30(f, stats.total_size, 3);
341 if (protocol_version >= 29) {
342 write_varlong30(f, stats.flist_buildtime, 3);
343 write_varlong30(f, stats.flist_xfertime, 3);
349 /* this is the client */
351 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
353 else if (!am_sender) {
354 /* Read the first two in opposite order because the meaning of
355 * read/write swaps when switching from sender to receiver. */
356 total_written = read_varlong30(f, 3);
357 total_read = read_varlong30(f, 3);
358 stats.total_size = read_varlong30(f, 3);
359 if (protocol_version >= 29) {
360 stats.flist_buildtime = read_varlong30(f, 3);
361 stats.flist_xfertime = read_varlong30(f, 3);
363 } else if (write_batch) {
364 /* The --read-batch process is going to be a client
365 * receiver, so we need to give it the stats. */
366 write_varlong30(batch_fd, total_read, 3);
367 write_varlong30(batch_fd, total_written, 3);
368 write_varlong30(batch_fd, stats.total_size, 3);
369 if (protocol_version >= 29) {
370 write_varlong30(batch_fd, stats.flist_buildtime, 3);
371 write_varlong30(batch_fd, stats.flist_xfertime, 3);
376 static void output_itemized_counts(const char *prefix, int *counts)
378 static char *labels[] = { "reg", "dir", "link", "dev", "special" };
379 char buf[1024], *pre = " (";
381 int total = counts[0];
383 counts[0] -= counts[1] + counts[2] + counts[3] + counts[4];
384 for (j = 0; j < 5; j++) {
386 len += snprintf(buf+len, sizeof buf - len - 2,
388 pre, labels[j], comma_num(counts[j]));
395 rprintf(FINFO, "%s: %s%s\n", prefix, comma_num(total), buf);
398 static const char *bytes_per_sec_human_dnum(void)
400 if (starttime == (time_t)-1 || endtime == (time_t)-1)
402 return human_dnum((total_written + total_read) / (0.5 + (endtime - starttime)), 2);
405 static void output_summary(void)
407 if (INFO_GTE(STATS, 2)) {
408 rprintf(FCLIENT, "\n");
409 output_itemized_counts("Number of files", &stats.num_files);
410 if (protocol_version >= 29)
411 output_itemized_counts("Number of created files", &stats.created_files);
412 if (protocol_version >= 31)
413 output_itemized_counts("Number of deleted files", &stats.deleted_files);
414 rprintf(FINFO,"Number of regular files transferred: %s\n",
415 comma_num(stats.xferred_files));
416 rprintf(FINFO,"Total file size: %s bytes\n",
417 human_num(stats.total_size));
418 rprintf(FINFO,"Total transferred file size: %s bytes\n",
419 human_num(stats.total_transferred_size));
420 rprintf(FINFO,"Literal data: %s bytes\n",
421 human_num(stats.literal_data));
422 rprintf(FINFO,"Matched data: %s bytes\n",
423 human_num(stats.matched_data));
424 rprintf(FINFO,"File list size: %s\n",
425 human_num(stats.flist_size));
426 if (stats.flist_buildtime) {
428 "File list generation time: %s seconds\n",
429 comma_dnum((double)stats.flist_buildtime / 1000, 3));
431 "File list transfer time: %s seconds\n",
432 comma_dnum((double)stats.flist_xfertime / 1000, 3));
434 rprintf(FINFO,"Total bytes sent: %s\n",
435 human_num(total_written));
436 rprintf(FINFO,"Total bytes received: %s\n",
437 human_num(total_read));
440 if (INFO_GTE(STATS, 1)) {
441 rprintf(FCLIENT, "\n");
443 "sent %s bytes received %s bytes %s bytes/sec\n",
444 human_num(total_written), human_num(total_read),
445 bytes_per_sec_human_dnum());
446 rprintf(FINFO, "total size is %s speedup is %s%s\n",
447 human_num(stats.total_size),
448 comma_dnum((double)stats.total_size / (total_written+total_read), 2),
449 write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : "");
458 * If our C library can get malloc statistics, then show them to FINFO
460 static void show_malloc_stats(void)
467 rprintf(FCLIENT, "\n");
468 rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
469 (int)getpid(), am_server ? "server " : "",
470 am_daemon ? "daemon " : "", who_am_i());
471 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
473 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
475 rprintf(FINFO, " smblks: %10ld\n",
477 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
479 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
481 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
482 (long)mi.arena + mi.hblkhd);
483 rprintf(FINFO, " usmblks: %10ld\n",
485 rprintf(FINFO, " fsmblks: %10ld\n",
487 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
489 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
491 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
493 #endif /* HAVE_MALLINFO */
497 /* Start the remote shell. cmd may be NULL to use the default. */
498 static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc,
499 int *f_in_p, int *f_out_p)
502 char *args[MAX_ARGS], *need_to_free = NULL;
506 if (!read_batch && !local_server) {
507 char *t, *f, in_quote = '\0';
508 char *rsh_env = getenv(RSYNC_RSH_ENV);
513 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 /* check to see if we've already been given '-l user' in
551 * the remote-shell command */
552 for (i = 0; i < argc-1; i++) {
553 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
558 /* remsh (on HPUX) takes the arguments the other way around */
559 args[argc++] = machine;
560 if (user && !(daemon_over_rsh && dash_l_set)) {
565 if (user && !(daemon_over_rsh && dash_l_set)) {
569 args[argc++] = machine;
572 args[argc++] = rsync_path;
574 if (blocking_io < 0) {
576 if ((cp = strrchr(cmd, '/')) != NULL)
580 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
584 server_options(args,&argc);
586 if (argc >= MAX_ARGS - 2)
592 if (!daemon_over_rsh) {
593 while (remote_argc > 0) {
594 if (argc >= MAX_ARGS - 1) {
596 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
597 exit_cleanup(RERR_SYNTAX);
599 if (**remote_argv == '-') {
600 if (asprintf(args + argc++, "./%s", *remote_argv++) < 0)
601 out_of_memory("do_cmd");
603 args[argc++] = *remote_argv++;
610 if (DEBUG_GTE(CMD, 2)) {
611 for (i = 0; i < argc; i++)
612 rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]);
613 rprintf(FCLIENT, "\n");
617 int from_gen_pipe[2];
618 set_allow_inc_recurse();
619 if (fd_pair(from_gen_pipe) < 0) {
620 rsyserr(FERROR, errno, "pipe");
621 exit_cleanup(RERR_IPC);
623 batch_gen_fd = from_gen_pipe[0];
624 *f_out_p = from_gen_pipe[1];
626 pid = (pid_t)-1; /* no child pid */
630 } else if (local_server) {
631 /* If the user didn't request --[no-]whole-file, force
632 * it on, but only if we're not batch processing. */
633 if (whole_file < 0 && !write_batch)
635 set_allow_inc_recurse();
636 pid = local_child(argc, args, f_in_p, f_out_p, child_main);
641 pid = piped_child(args, f_in_p, f_out_p);
645 if (protect_args && !daemon_over_rsh)
646 send_protected_args(*f_out_p, args);
655 out_of_memory("do_cmd");
656 return 0; /* not reached */
659 /* The receiving side operates in one of two modes:
661 * 1. it receives any number of files into a destination directory,
662 * placing them according to their names in the file-list.
664 * 2. it receives a single file and saves it using the name in the
665 * destination path instead of its file-list name. This requires a
666 * "local name" for writing out the destination file.
668 * So, our task is to figure out what mode/local-name we need.
669 * For mode 1, we change into the destination directory and return NULL.
670 * For mode 2, we change into the directory containing the destination
671 * file (if we aren't already there) and return the local-name. */
672 static char *get_local_name(struct file_list *flist, char *dest_path)
678 if (DEBUG_GTE(RECV, 1)) {
679 rprintf(FINFO, "get_local_name count=%d %s\n",
680 file_total, NS(dest_path));
683 if (!dest_path || list_only)
686 /* Treat an empty string as a copy into the current directory. */
690 if (daemon_filter_list.head) {
691 char *slash = strrchr(dest_path, '/');
692 if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0')))
696 if ((*dest_path != '.' || dest_path[1] != '\0')
697 && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0
698 || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) {
699 rprintf(FERROR, "ERROR: daemon has excluded destination \"%s\"\n",
701 exit_cleanup(RERR_FILESELECT);
707 /* See what currently exists at the destination. */
708 if ((statret = do_stat(dest_path, &st)) == 0) {
709 /* If the destination is a dir, enter it and use mode 1. */
710 if (S_ISDIR(st.st_mode)) {
711 if (!change_dir(dest_path, CD_NORMAL)) {
712 rsyserr(FERROR, errno, "change_dir#1 %s failed",
713 full_fname(dest_path));
714 exit_cleanup(RERR_FILESELECT);
716 filesystem_dev = st.st_dev; /* ensures --force works right w/-x */
719 if (file_total > 1) {
721 "ERROR: destination must be a directory when"
722 " copying more than 1 file\n");
723 exit_cleanup(RERR_FILESELECT);
725 if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) {
727 "ERROR: cannot overwrite non-directory"
728 " with a directory\n");
729 exit_cleanup(RERR_FILESELECT);
731 } else if (errno != ENOENT) {
732 /* If we don't know what's at the destination, fail. */
733 rsyserr(FERROR, errno, "ERROR: cannot stat destination %s",
734 full_fname(dest_path));
735 exit_cleanup(RERR_FILESELECT);
738 cp = strrchr(dest_path, '/');
740 /* If we need a destination directory because the transfer is not
741 * of a single non-directory or the user has requested one via a
742 * destination path ending in a slash, create one and use mode 1. */
743 if (file_total > 1 || (cp && !cp[1])) {
744 /* Lop off the final slash (if any). */
750 "ERROR: destination path is not a directory\n");
751 exit_cleanup(RERR_SYNTAX);
754 if (do_mkdir(dest_path, ACCESSPERMS) != 0) {
755 rsyserr(FERROR, errno, "mkdir %s failed",
756 full_fname(dest_path));
757 exit_cleanup(RERR_FILEIO);
760 if (flist->high >= flist->low
761 && strcmp(flist->files[flist->low]->basename, ".") == 0)
762 flist->files[0]->flags |= FLAG_DIR_CREATED;
764 if (INFO_GTE(NAME, 1))
765 rprintf(FINFO, "created directory %s\n", dest_path);
768 /* Indicate that dest dir doesn't really exist. */
772 if (!change_dir(dest_path, dry_run > 1 ? CD_SKIP_CHDIR : CD_NORMAL)) {
773 rsyserr(FERROR, errno, "change_dir#2 %s failed",
774 full_fname(dest_path));
775 exit_cleanup(RERR_FILESELECT);
781 /* Otherwise, we are writing a single file, possibly on top of an
782 * existing non-directory. Change to the item's parent directory
783 * (if it has a path component), return the basename of the
784 * destination file as the local name, and use mode 2. */
792 if (!change_dir(dest_path, CD_NORMAL)) {
793 rsyserr(FERROR, errno, "change_dir#3 %s failed",
794 full_fname(dest_path));
795 exit_cleanup(RERR_FILESELECT);
802 /* This function checks on our alternate-basis directories. If we're in
803 * dry-run mode and the destination dir does not yet exist, we'll try to
804 * tweak any dest-relative paths to make them work for a dry-run (the
805 * destination dir must be in curr_dir[] when this function is called).
806 * We also warn about any arg that is non-existent or not a directory. */
807 static void check_alt_basis_dirs(void)
810 char *slash = strrchr(curr_dir, '/');
813 for (j = 0; j < basis_dir_cnt; j++) {
814 char *bdir = basis_dir[j];
815 int bd_len = strlen(bdir);
816 if (bd_len > 1 && bdir[bd_len-1] == '/')
817 bdir[--bd_len] = '\0';
818 if (dry_run > 1 && *bdir != '/') {
819 int len = curr_dir_len + 1 + bd_len + 1;
820 char *new = new_array(char, len);
822 out_of_memory("check_alt_basis_dirs");
823 if (slash && strncmp(bdir, "../", 3) == 0) {
824 /* We want to remove only one leading "../" prefix for
825 * the directory we couldn't create in dry-run mode:
826 * this ensures that any other ".." references get
827 * evaluated the same as they would for a live copy. */
829 pathjoin(new, len, curr_dir, bdir + 3);
832 pathjoin(new, len, curr_dir, bdir);
833 basis_dir[j] = bdir = new;
835 if (do_stat(bdir, &st) < 0)
836 rprintf(FWARNING, "%s arg does not exist: %s\n", alt_dest_opt(0), bdir);
837 else if (!S_ISDIR(st.st_mode))
838 rprintf(FWARNING, "%s arg is not a dir: %s\n", alt_dest_opt(0), bdir);
842 /* This is only called by the sender. */
843 static void read_final_goodbye(int f_in, int f_out)
847 char xname[MAXPATHLEN];
849 shutting_down = True;
851 if (protocol_version < 29)
854 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
855 if (protocol_version >= 31 && i == NDX_DONE) {
857 write_ndx(f_out, NDX_DONE);
859 if (batch_gen_fd >= 0) {
860 while (read_int(batch_gen_fd) != NDX_DEL_STATS) {}
861 read_del_stats(batch_gen_fd);
863 write_int(f_out, NDX_DONE);
865 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
870 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
872 exit_cleanup(RERR_PROTOCOL);
876 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
878 struct file_list *flist;
881 if (DEBUG_GTE(SEND, 1))
882 rprintf(FINFO, "server_sender starting pid=%d\n", (int)getpid());
884 if (am_daemon && lp_write_only(module_id)) {
885 rprintf(FERROR, "ERROR: module is write only\n");
886 exit_cleanup(RERR_SYNTAX);
888 if (am_daemon && read_only && remove_source_files) {
890 "ERROR: --remove-%s-files cannot be used with a read-only module\n",
891 remove_source_files == 1 ? "source" : "sent");
892 exit_cleanup(RERR_SYNTAX);
895 rprintf(FERROR, "ERROR: do_server_sender called without args\n");
896 exit_cleanup(RERR_SYNTAX);
899 become_copy_as_user();
902 if (!relative_paths) {
903 if (!change_dir(dir, CD_NORMAL)) {
904 rsyserr(FERROR, errno, "change_dir#3 %s failed",
906 exit_cleanup(RERR_FILESELECT);
912 if (argc == 0 && (recurse || xfer_dirs || list_only)) {
918 flist = send_file_list(f_out,argc,argv);
919 if (!flist || flist->used == 0) {
920 /* Make sure input buffering is off so we can't hang in noop_io_until_death(). */
921 io_end_buffering_in(0);
922 /* TODO: we should really exit in a more controlled manner. */
926 io_start_buffering_in(f_in);
928 send_files(f_in, f_out);
929 io_flush(FULL_FLUSH);
931 if (protocol_version >= 24)
932 read_final_goodbye(f_in, f_out);
933 io_flush(FULL_FLUSH);
938 static int do_recv(int f_in, int f_out, char *local_name)
944 /* The receiving side mustn't obey this, or an existing symlink that
945 * points to an identical file won't be replaced by the referent. */
946 copy_links = copy_dirlinks = copy_unsafe_links = 0;
948 #ifdef SUPPORT_HARD_LINKS
949 if (preserve_hard_links && !inc_recurse)
950 match_hard_links(first_flist);
953 if (fd_pair(error_pipe) < 0) {
954 rsyserr(FERROR, errno, "pipe failed in do_recv");
955 exit_cleanup(RERR_IPC);
961 if (backup_dir_len > 1)
962 backup_dir_buf[backup_dir_len-1] = '\0';
963 ret = do_stat(backup_dir_buf, &st);
964 if (ret != 0 || !S_ISDIR(st.st_mode)) {
966 rprintf(FERROR, "The backup-dir is not a directory: %s\n", backup_dir_buf);
967 exit_cleanup(RERR_SYNTAX);
969 if (errno != ENOENT) {
970 rprintf(FERROR, "Failed to stat %s: %s\n", backup_dir_buf, strerror(errno));
971 exit_cleanup(RERR_FILEIO);
973 if (INFO_GTE(BACKUP, 1))
974 rprintf(FINFO, "(new) backup_dir is %s\n", backup_dir_buf);
975 } else if (INFO_GTE(BACKUP, 1))
976 rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
977 if (backup_dir_len > 1)
978 backup_dir_buf[backup_dir_len-1] = '/';
981 io_flush(FULL_FLUSH);
983 if ((pid = do_fork()) == -1) {
984 rsyserr(FERROR, errno, "fork failed in do_recv");
985 exit_cleanup(RERR_IPC);
990 send_msgs_to_gen = am_server;
992 close(error_pipe[0]);
994 /* We can't let two processes write to the socket at one time. */
995 io_end_multiplex_out(MPLX_SWITCHING);
999 f_out = error_pipe[1];
1001 bwlimit_writemax = 0; /* receiver doesn't need to do this */
1004 io_start_buffering_in(f_in);
1005 io_start_multiplex_out(f_out);
1007 recv_files(f_in, f_out, local_name);
1008 io_flush(FULL_FLUSH);
1011 if (output_needs_newline) {
1012 fputc('\n', stdout);
1013 output_needs_newline = 0;
1016 write_int(f_out, NDX_DONE);
1017 send_msg(MSG_STATS, (char*)&stats.total_read, sizeof stats.total_read, 0);
1018 io_flush(FULL_FLUSH);
1020 /* Handle any keep-alive packets from the post-processing work
1021 * that the generator does. */
1022 if (protocol_version >= 29) {
1023 kluge_around_eof = -1;
1025 /* This should only get stopped via a USR2 signal. */
1026 read_final_goodbye(f_in, f_out);
1028 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
1030 exit_cleanup(RERR_PROTOCOL);
1033 /* Finally, we go to sleep until our parent kills us with a
1034 * USR2 signal. We sleep for a short time, as on some OSes
1035 * a signal won't interrupt a sleep! */
1041 flist_receiving_enabled = True;
1043 io_end_multiplex_in(MPLX_SWITCHING);
1044 if (write_batch && !am_server)
1047 close(error_pipe[1]);
1051 f_in = error_pipe[0];
1053 io_start_buffering_out(f_out);
1054 io_start_multiplex_in(f_in);
1056 #ifdef SUPPORT_HARD_LINKS
1057 if (preserve_hard_links && inc_recurse) {
1058 struct file_list *flist;
1059 for (flist = first_flist; flist; flist = flist->next)
1060 match_hard_links(flist);
1064 generate_files(f_out, local_name);
1067 io_flush(FULL_FLUSH);
1068 shutting_down = True;
1069 if (protocol_version >= 24) {
1070 /* send a final goodbye message */
1071 write_ndx(f_out, NDX_DONE);
1073 io_flush(FULL_FLUSH);
1076 wait_process_with_flush(pid, &exit_code);
1080 static void do_server_recv(int f_in, int f_out, int argc, char *argv[])
1083 struct file_list *flist;
1084 char *local_name = NULL;
1087 if (filesfrom_fd >= 0 && !msgs2stderr && protocol_version < 31) {
1088 /* We can't mix messages with files-from data on the socket,
1089 * so temporarily turn off info/debug messages. */
1090 negate_output_levels();
1095 if (DEBUG_GTE(RECV, 1))
1096 rprintf(FINFO, "server_recv(%d) starting pid=%d\n", argc, (int)getpid());
1098 if (am_daemon && read_only) {
1099 rprintf(FERROR,"ERROR: module is read only\n");
1100 exit_cleanup(RERR_SYNTAX);
1104 become_copy_as_user();
1107 char *dir = argv[0];
1110 if (!am_daemon && !change_dir(dir, CD_NORMAL)) {
1111 rsyserr(FERROR, errno, "change_dir#4 %s failed",
1113 exit_cleanup(RERR_FILESELECT);
1117 if (protocol_version >= 30)
1118 io_start_multiplex_in(f_in);
1120 io_start_buffering_in(f_in);
1121 recv_filter_list(f_in);
1123 if (filesfrom_fd >= 0) {
1124 /* We need to send the files-from names to the sender at the
1125 * same time that we receive the file-list from them, so we
1126 * need the IO routines to automatically write out the names
1127 * onto our f_out socket as we read the file-list. This
1128 * avoids both deadlock and extra delays/buffers. */
1129 start_filesfrom_forwarding(filesfrom_fd);
1133 flist = recv_file_list(f_in, -1);
1135 rprintf(FERROR,"server_recv: recv_file_list error\n");
1136 exit_cleanup(RERR_FILESELECT);
1138 if (inc_recurse && file_total == 1)
1139 recv_additional_file_list(f_in);
1142 negate_output_levels();
1145 local_name = get_local_name(flist,argv[0]);
1147 /* Now that we know what our destination directory turned out to be,
1148 * we can sanitize the --link-/copy-/compare-dest args correctly. */
1149 if (sanitize_paths) {
1151 for (dir_p = basis_dir; *dir_p; dir_p++)
1152 *dir_p = sanitize_path(NULL, *dir_p, NULL, curr_dir_depth, SP_DEFAULT);
1154 partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, SP_DEFAULT);
1156 check_alt_basis_dirs();
1158 if (daemon_filter_list.head) {
1160 filter_rule_list *elp = &daemon_filter_list;
1162 for (dir_p = basis_dir; *dir_p; dir_p++) {
1165 dir += module_dirlen;
1166 if (check_filter(elp, FLOG, dir, 1) < 0)
1167 goto options_rejected;
1169 if (partial_dir && *partial_dir == '/'
1170 && check_filter(elp, FLOG, partial_dir + module_dirlen, 1) < 0) {
1173 "Your options have been rejected by the server.\n");
1174 exit_cleanup(RERR_SYNTAX);
1178 exit_code = do_recv(f_in, f_out, local_name);
1179 exit_cleanup(exit_code);
1183 int child_main(int argc, char *argv[])
1185 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1190 void start_server(int f_in, int f_out, int argc, char *argv[])
1192 set_nonblocking(f_in);
1193 set_nonblocking(f_out);
1195 io_set_sock_fds(f_in, f_out);
1196 setup_protocol(f_out, f_in);
1198 if (protocol_version >= 23)
1199 io_start_multiplex_out(f_out);
1200 if (am_daemon && io_timeout && protocol_version >= 31)
1201 send_msg_int(MSG_IO_TIMEOUT, io_timeout);
1204 keep_dirlinks = 0; /* Must be disabled on the sender. */
1205 if (need_messages_from_generator)
1206 io_start_multiplex_in(f_in);
1208 io_start_buffering_in(f_in);
1209 recv_filter_list(f_in);
1210 do_server_sender(f_in, f_out, argc, argv);
1212 do_server_recv(f_in, f_out, argc, argv);
1216 /* This is called once the connection has been negotiated. It is used
1217 * for rsyncd, remote-shell, and local connections. */
1218 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
1220 struct file_list *flist = NULL;
1221 int exit_code = 0, exit_code2 = 0;
1222 char *local_name = NULL;
1224 cleanup_child_pid = pid;
1226 set_nonblocking(f_in);
1227 set_nonblocking(f_out);
1230 io_set_sock_fds(f_in, f_out);
1231 setup_protocol(f_out,f_in);
1233 /* We set our stderr file handle to blocking because ssh might have
1234 * set it to non-blocking. This can be particularly troublesome if
1235 * stderr is a clone of stdout, because ssh would have set our stdout
1236 * to non-blocking at the same time (which can easily cause us to lose
1237 * output from our print statements). This kluge shouldn't cause ssh
1238 * any problems for how we use it. Note also that we delayed setting
1239 * this until after the above protocol setup so that we know for sure
1240 * that ssh is done twiddling its file descriptors. */
1241 set_blocking(STDERR_FILENO);
1244 keep_dirlinks = 0; /* Must be disabled on the sender. */
1247 && (log_format_has(stdout_format, 'C')
1248 || log_format_has(logfile_format, 'C')))
1249 sender_keeps_checksum = 1;
1251 if (protocol_version >= 30)
1252 io_start_multiplex_out(f_out);
1254 io_start_buffering_out(f_out);
1255 if (protocol_version >= 31 || (!filesfrom_host && protocol_version >= 23))
1256 io_start_multiplex_in(f_in);
1258 io_start_buffering_in(f_in);
1259 send_filter_list(f_out);
1261 filesfrom_fd = f_in;
1263 if (write_batch && !am_server)
1264 start_write_batch(f_out);
1266 become_copy_as_user();
1268 flist = send_file_list(f_out, argc, argv);
1269 if (DEBUG_GTE(FLIST, 3))
1270 rprintf(FINFO,"file list sent\n");
1272 if (protocol_version < 31 && filesfrom_host && protocol_version >= 23)
1273 io_start_multiplex_in(f_in);
1275 io_flush(NORMAL_FLUSH);
1276 send_files(f_in, f_out);
1277 io_flush(FULL_FLUSH);
1279 if (protocol_version >= 24)
1280 read_final_goodbye(f_in, f_out);
1282 if (DEBUG_GTE(EXIT, 2))
1283 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
1284 io_flush(FULL_FLUSH);
1285 wait_process_with_flush(pid, &exit_code);
1288 io_flush(FULL_FLUSH);
1289 exit_cleanup(exit_code);
1293 if (protocol_version >= 23)
1294 io_start_multiplex_in(f_in);
1295 if (need_messages_from_generator)
1296 io_start_multiplex_out(f_out);
1298 io_start_buffering_out(f_out);
1301 become_copy_as_user();
1303 send_filter_list(read_batch ? -1 : f_out);
1305 if (filesfrom_fd >= 0) {
1306 start_filesfrom_forwarding(filesfrom_fd);
1310 if (write_batch && !am_server)
1311 start_write_batch(f_in);
1312 flist = recv_file_list(f_in, -1);
1313 if (inc_recurse && file_total == 1)
1314 recv_additional_file_list(f_in);
1316 if (flist && flist->used > 0) {
1317 local_name = get_local_name(flist, argv[0]);
1319 check_alt_basis_dirs();
1321 exit_code2 = do_recv(f_in, f_out, local_name);
1328 if (DEBUG_GTE(RECV, 1))
1329 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
1330 io_flush(FULL_FLUSH);
1331 wait_process_with_flush(pid, &exit_code);
1334 return MAX(exit_code, exit_code2);
1337 static int copy_argv(char *argv[])
1341 for (i = 0; argv[i]; i++) {
1342 if (!(argv[i] = strdup(argv[i]))) {
1343 rprintf (FERROR, "out of memory at %s(%d)\n",
1344 __FILE__, __LINE__);
1353 /* Start a client for either type of remote connection. Work out
1354 * whether the arguments request a remote shell or rsyncd connection,
1355 * and call the appropriate connection function, then run_client.
1357 * Calls either start_socket_client (for sockets) or do_cmd and
1358 * client_run (for ssh). */
1359 static int start_client(int argc, char *argv[])
1361 char *p, *shell_machine = NULL, *shell_user = NULL;
1363 int remote_argc, env_port = rsync_port;
1368 /* Don't clobber argv[] so that ps(1) can still show the right
1370 if ((ret = copy_argv(argv)) != 0)
1373 if (!read_batch) { /* for read_batch, NO source is specified */
1374 char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1375 if (path) { /* source is remote */
1382 if (argc == 1 || **argv == ':')
1383 argc = 0; /* no dest arg */
1384 else if (check_for_hostspec(*argv, &dummy_host, &dummy_port)) {
1386 "The source and destination cannot both be remote.\n");
1387 exit_cleanup(RERR_SYNTAX);
1389 remote_argc--; /* don't count dest */
1392 if (filesfrom_host && *filesfrom_host
1393 && strcmp(filesfrom_host, shell_machine) != 0) {
1395 "--files-from hostname is not the same as the transfer hostname\n");
1396 exit_cleanup(RERR_SYNTAX);
1400 daemon_over_rsh = shell_cmd ? 1 : -1;
1401 } else { /* source is local, check dest arg */
1406 remote_argv = argv + argc;
1408 static char *dotarg[1] = { "." };
1410 remote_argv = dotarg;
1414 path = check_for_hostspec(p, &shell_machine, &rsync_port);
1415 if (path && filesfrom_host && *filesfrom_host
1416 && strcmp(filesfrom_host, shell_machine) != 0) {
1418 "--files-from hostname is not the same as the transfer hostname\n");
1419 exit_cleanup(RERR_SYNTAX);
1421 if (!path) { /* no hostspec found, so src & dest are local */
1423 if (filesfrom_host) {
1425 "--files-from cannot be remote when the transfer is local\n");
1426 exit_cleanup(RERR_SYNTAX);
1428 shell_machine = NULL;
1430 } else { /* hostspec was found, so dest is remote */
1433 daemon_over_rsh = shell_cmd ? 1 : -1;
1436 } else { /* read_batch */
1438 if (check_for_hostspec(argv[argc-1], &shell_machine, &rsync_port)) {
1439 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1440 exit_cleanup(RERR_SYNTAX);
1442 remote_argv = argv += argc - 1;
1443 remote_argc = argc = 1;
1447 if (!rsync_port && remote_argc && !**remote_argv) /* Turn an empty arg into a dot dir. */
1452 int dummy_port = rsync_port;
1454 /* For local source, extra source args must not have hostspec. */
1455 for (i = 1; i < argc; i++) {
1456 if (check_for_hostspec(argv[i], &dummy_host, &dummy_port)) {
1457 rprintf(FERROR, "Unexpected remote arg: %s\n", argv[i]);
1458 exit_cleanup(RERR_SYNTAX);
1463 int dummy_port = rsync_port;
1465 /* For remote source, any extra source args must have either
1466 * the same hostname or an empty hostname. */
1467 for (i = 1; i < remote_argc; i++) {
1468 char *arg = check_for_hostspec(remote_argv[i], &dummy_host, &dummy_port);
1470 rprintf(FERROR, "Unexpected local arg: %s\n", remote_argv[i]);
1471 rprintf(FERROR, "If arg is a remote file/dir, prefix it with a colon (:).\n");
1472 exit_cleanup(RERR_SYNTAX);
1474 if (*dummy_host && strcmp(dummy_host, shell_machine) != 0) {
1475 rprintf(FERROR, "All source args must come from the same machine.\n");
1476 exit_cleanup(RERR_SYNTAX);
1478 if (rsync_port != dummy_port) {
1479 if (!rsync_port || !dummy_port)
1480 rprintf(FERROR, "All source args must use the same hostspec format.\n");
1482 rprintf(FERROR, "All source args must use the same port number.\n");
1483 exit_cleanup(RERR_SYNTAX);
1485 if (!rsync_port && !*arg) /* Turn an empty arg into a dot dir. */
1487 remote_argv[i] = arg;
1492 rsync_port = RSYNC_PORT;
1494 env_port = rsync_port;
1496 if (daemon_over_rsh < 0)
1497 return start_socket_client(shell_machine, remote_argc, remote_argv, argc, argv);
1499 if (password_file && !daemon_over_rsh) {
1500 rprintf(FERROR, "The --password-file option may only be "
1501 "used when accessing an rsync daemon.\n");
1502 exit_cleanup(RERR_SYNTAX);
1505 if (connect_timeout) {
1506 rprintf(FERROR, "The --contimeout option may only be "
1507 "used when connecting to an rsync daemon.\n");
1508 exit_cleanup(RERR_SYNTAX);
1511 if (shell_machine) {
1512 p = strrchr(shell_machine,'@');
1515 shell_user = shell_machine;
1516 shell_machine = p+1;
1520 if (DEBUG_GTE(CMD, 2)) {
1521 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1522 NS(shell_cmd), NS(shell_machine), NS(shell_user),
1523 NS(remote_argv[0]));
1527 if (daemon_over_rsh)
1528 set_env_num("RSYNC_PORT", env_port);
1531 pid = do_cmd(shell_cmd, shell_machine, shell_user, remote_argv, remote_argc,
1534 /* if we're running an rsync server on the remote host over a
1535 * remote shell command, we need to do the RSYNCD protocol first */
1536 if (daemon_over_rsh) {
1538 tmpret = start_inband_exchange(f_in, f_out, shell_user, remote_argc, remote_argv);
1543 ret = client_run(f_in, f_out, pid, argc, argv);
1552 static void sigusr1_handler(UNUSED(int val))
1554 called_from_signal_handler = 1;
1555 exit_cleanup(RERR_SIGNAL1);
1558 static void sigusr2_handler(UNUSED(int val))
1564 _exit(RERR_PARTIAL);
1568 static void siginfo_handler(UNUSED(int val))
1570 if (!am_server && !INFO_GTE(PROGRESS, 1))
1571 want_progress_now = True;
1574 void remember_children(UNUSED(int val))
1579 /* An empty waitpid() loop was put here by Tridge and we could never
1580 * get him to explain why he put it in, so rather than taking it
1581 * out we're instead saving the child exit statuses for later use.
1582 * The waitpid() loop presumably eliminates all possibility of leaving
1583 * zombie children, maybe that's why he did it. */
1584 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1585 /* save the child's exit status */
1586 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1587 if (pid_stat_table[cnt].pid == 0) {
1588 pid_stat_table[cnt].pid = pid;
1589 pid_stat_table[cnt].status = status;
1595 #ifndef HAVE_SIGACTION
1596 signal(SIGCHLD, remember_children);
1602 * This routine catches signals and tries to send them to gdb.
1604 * Because it's called from inside a signal handler it ought not to
1605 * use too many library routines.
1607 * @todo Perhaps use "screen -X" instead/as well, to help people
1608 * debugging without easy access to X. Perhaps use an environment
1609 * variable, or just call a script?
1611 * @todo The /proc/ magic probably only works on Linux (and
1612 * Solaris?) Can we be more portable?
1614 #ifdef MAINTAINER_MODE
1615 const char *get_panic_action(void)
1617 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1621 return "xterm -display :0 -T Panic -n Panic -e gdb /proc/%d/exe %d";
1626 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1628 * This signal handler is only installed if we were configured with
1629 * --enable-maintainer-mode. Perhaps it should always be on and we
1630 * should just look at the environment variable, but I'm a bit leery
1631 * of a signal sending us into a busy loop.
1633 static void rsync_panic_handler(UNUSED(int whatsig))
1636 int ret, pid_int = getpid();
1638 snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(), pid_int, pid_int);
1640 /* Unless we failed to execute gdb, we allow the process to
1641 * continue. I'm not sure if that's right. */
1642 ret = shell_exec(cmd_buf);
1649 int main(int argc,char *argv[])
1656 #ifdef HAVE_SIGACTION
1657 # ifdef HAVE_SIGPROCMASK
1660 sigemptyset(&sigmask);
1662 sigact.sa_flags = SA_NOCLDSTOP;
1664 SIGACTMASK(SIGUSR1, sigusr1_handler);
1665 SIGACTMASK(SIGUSR2, sigusr2_handler);
1666 SIGACTMASK(SIGCHLD, remember_children);
1667 #ifdef MAINTAINER_MODE
1668 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1669 SIGACTMASK(SIGFPE, rsync_panic_handler);
1670 SIGACTMASK(SIGABRT, rsync_panic_handler);
1671 SIGACTMASK(SIGBUS, rsync_panic_handler);
1674 SIGACTMASK(SIGINFO, siginfo_handler);
1677 SIGACTMASK(SIGVTALRM, siginfo_handler);
1680 starttime = time(NULL);
1683 am_root = our_uid == 0;
1685 memset(&stats, 0, sizeof(stats));
1687 /* Even a non-daemon runs needs the default config values to be set, e.g.
1688 * lp_dont_compress() is queried when no --skip-compress option is set. */
1689 reset_daemon_vars();
1693 exit_cleanup(RERR_SYNTAX);
1696 /* Get the umask for use in permission calculations. We no longer set
1697 * it to zero; that is ugly and pointless now that all the callers that
1698 * relied on it have been reeducated to work with default ACLs. */
1699 umask(orig_umask = umask(0));
1701 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1702 setlocale(LC_CTYPE, "");
1705 if (!parse_arguments(&argc, (const char ***) &argv)) {
1707 exit_cleanup(RERR_SYNTAX);
1710 && poptDupArgv(argc, (const char **)argv, &cooked_argc, (const char ***)&cooked_argv) != 0)
1711 out_of_memory("main");
1713 SIGACTMASK(SIGINT, sig_int);
1714 SIGACTMASK(SIGHUP, sig_int);
1715 SIGACTMASK(SIGTERM, sig_int);
1716 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1717 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1720 /* Ignore SIGPIPE; we consistently check error codes and will
1722 SIGACTION(SIGPIPE, SIG_IGN);
1724 SIGACTION(SIGXFSZ, SIG_IGN);
1727 /* Initialize change_dir() here because on some old systems getcwd
1728 * (implemented by forking "pwd" and reading its output) doesn't
1729 * work when there are other child processes. Also, on all systems
1730 * that implement getcwd that way "pwd" can't be found after chroot. */
1731 change_dir(NULL, CD_NORMAL);
1733 if ((write_batch || read_batch) && !am_server) {
1734 open_batch_files(); /* sets batch_fd */
1736 read_stream_flags(batch_fd);
1738 write_stream_flags(batch_fd);
1740 if (write_batch < 0)
1747 } else if (am_daemon)
1748 return daemon_main();
1750 if (am_server && protect_args) {
1751 char buf[MAXPATHLEN];
1753 read_args(STDIN_FILENO, NULL, buf, sizeof buf, 1, &argv, &argc, NULL);
1754 if (!parse_arguments(&argc, (const char ***) &argv)) {
1756 exit_cleanup(RERR_SYNTAX);
1762 exit_cleanup(RERR_SYNTAX);
1766 set_nonblocking(STDIN_FILENO);
1767 set_nonblocking(STDOUT_FILENO);
1769 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1770 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1773 ret = start_client(argc, argv);
1775 exit_cleanup(RERR_STARTCLIENT);