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 *dest_option;
90 extern char *rsync_path;
91 extern char *shell_cmd;
92 extern char *password_file;
93 extern char *backup_dir;
95 extern char curr_dir[MAXPATHLEN];
96 extern char backup_dir_buf[MAXPATHLEN];
97 extern char *basis_dir[MAX_BASIS_DIRS+1];
98 extern struct file_list *first_flist;
99 extern filter_rule_list daemon_filter_list;
103 int am_receiver = 0; /* Only set to 1 after the receiver/generator fork. */
104 int am_generator = 0; /* Only set to 1 after the receiver/generator fork. */
105 int local_server = 0;
106 int daemon_over_rsh = 0;
107 mode_t orig_umask = 0;
108 int batch_gen_fd = -1;
109 int sender_keeps_checksum = 0;
110 int raw_argc, cooked_argc;
111 char **raw_argv, **cooked_argv;
113 /* There's probably never more than at most 2 outstanding child processes,
114 * but set it higher, just in case. */
115 #define MAXCHILDPROCS 7
117 #ifdef HAVE_SIGACTION
118 # ifdef HAVE_SIGPROCMASK
119 # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
121 # define SIGACTMASK(n,h) SIGACTION(n,h)
123 static struct sigaction sigact;
129 } pid_stat_table[MAXCHILDPROCS];
131 static time_t starttime, endtime;
132 static int64 total_read, total_written;
134 static void show_malloc_stats(void);
136 /* Works like waitpid(), but if we already harvested the child pid in our
137 * remember_children(), we succeed instead of returning an error. */
138 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
143 waited_pid = waitpid(pid, status_ptr, flags);
144 } while (waited_pid == -1 && errno == EINTR);
146 if (waited_pid == -1 && errno == ECHILD) {
147 /* Status of requested child no longer available: check to
148 * see if it was processed by remember_children(). */
150 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
151 if (pid == pid_stat_table[cnt].pid) {
152 *status_ptr = pid_stat_table[cnt].status;
153 pid_stat_table[cnt].pid = 0;
162 int shell_exec(const char *cmd)
164 char *shell = getenv("RSYNC_SHELL");
171 if ((pid = fork()) < 0)
175 execlp(shell, shell, "-c", cmd, NULL);
179 int ret = wait_process(pid, &status, 0);
180 return ret < 0 ? -1 : status;
183 /* Wait for a process to exit, calling io_flush while waiting. */
184 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
189 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
191 io_flush(FULL_FLUSH);
194 /* TODO: If the child exited on a signal, then log an
195 * appropriate error message. Perhaps we should also accept a
196 * message describing the purpose of the child. Also indicate
197 * this to the caller so that they know something went wrong. */
198 if (waited_pid < 0) {
199 rsyserr(FERROR, errno, "waitpid");
200 *exit_code_ptr = RERR_WAITCHILD;
201 } else if (!WIFEXITED(status)) {
203 if (WCOREDUMP(status))
204 *exit_code_ptr = RERR_CRASHED;
207 if (WIFSIGNALED(status))
208 *exit_code_ptr = RERR_TERMINATED;
210 *exit_code_ptr = RERR_WAITCHILD;
212 *exit_code_ptr = WEXITSTATUS(status);
215 void write_del_stats(int f)
218 write_int(f, NDX_DEL_STATS);
220 write_ndx(f, NDX_DEL_STATS);
221 write_varint(f, stats.deleted_files - stats.deleted_dirs
222 - stats.deleted_symlinks - stats.deleted_devices
223 - stats.deleted_specials);
224 write_varint(f, stats.deleted_dirs);
225 write_varint(f, stats.deleted_symlinks);
226 write_varint(f, stats.deleted_devices);
227 write_varint(f, stats.deleted_specials);
230 void read_del_stats(int f)
232 stats.deleted_files = read_varint(f);
233 stats.deleted_files += stats.deleted_dirs = read_varint(f);
234 stats.deleted_files += stats.deleted_symlinks = read_varint(f);
235 stats.deleted_files += stats.deleted_devices = read_varint(f);
236 stats.deleted_files += stats.deleted_specials = read_varint(f);
239 static void become_copy_as_user()
248 if (DEBUG_GTE(CMD, 2))
249 rprintf(FINFO, "[%s] copy_as=%s\n", who_am_i(), copy_as);
251 if ((gname = strchr(copy_as, ':')) != NULL)
254 if (!user_to_uid(copy_as, &uid, True)) {
255 rprintf(FERROR, "Invalid copy-as user: %s\n", copy_as);
256 exit_cleanup(RERR_SYNTAX);
260 if (!group_to_gid(gname, &gid, True)) {
261 rprintf(FERROR, "Invalid copy-as group: %s\n", gname);
262 exit_cleanup(RERR_SYNTAX);
266 if ((pw = getpwuid(uid)) == NULL) {
267 rsyserr(FERROR, errno, "getpwuid failed");
268 exit_cleanup(RERR_SYNTAX);
273 if (setgid(gid) < 0) {
274 rsyserr(FERROR, errno, "setgid failed");
275 exit_cleanup(RERR_SYNTAX);
277 #ifdef HAVE_SETGROUPS
278 if (setgroups(1, &gid)) {
279 rsyserr(FERROR, errno, "setgroups failed");
280 exit_cleanup(RERR_SYNTAX);
283 #ifdef HAVE_INITGROUPS
284 if (!gname && initgroups(copy_as, gid) < 0) {
285 rsyserr(FERROR, errno, "initgroups failed");
286 exit_cleanup(RERR_SYNTAX);
295 rsyserr(FERROR, errno, "setuid failed");
296 exit_cleanup(RERR_SYNTAX);
301 am_root = (our_uid == 0);
307 /* This function gets called from all 3 processes. We want the client side
308 * to actually output the text, but the sender is the only process that has
309 * all the stats we need. So, if we're a client sender, we do the report.
310 * If we're a server sender, we write the stats on the supplied fd. If
311 * we're the client receiver we read the stats from the supplied fd and do
312 * the report. All processes might also generate a set of debug stats, if
313 * the verbose level is high enough (this is the only thing that the
314 * generator process and the server receiver ever do here). */
315 static void handle_stats(int f)
317 endtime = time(NULL);
319 /* Cache two stats because the read/write code can change it. */
320 total_read = stats.total_read;
321 total_written = stats.total_written;
323 if (INFO_GTE(STATS, 3)) {
324 /* These come out from every process */
333 if (f == -1 || !am_sender)
339 write_varlong30(f, total_read, 3);
340 write_varlong30(f, total_written, 3);
341 write_varlong30(f, stats.total_size, 3);
342 if (protocol_version >= 29) {
343 write_varlong30(f, stats.flist_buildtime, 3);
344 write_varlong30(f, stats.flist_xfertime, 3);
350 /* this is the client */
352 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
354 else if (!am_sender) {
355 /* Read the first two in opposite order because the meaning of
356 * read/write swaps when switching from sender to receiver. */
357 total_written = read_varlong30(f, 3);
358 total_read = read_varlong30(f, 3);
359 stats.total_size = read_varlong30(f, 3);
360 if (protocol_version >= 29) {
361 stats.flist_buildtime = read_varlong30(f, 3);
362 stats.flist_xfertime = read_varlong30(f, 3);
364 } else if (write_batch) {
365 /* The --read-batch process is going to be a client
366 * receiver, so we need to give it the stats. */
367 write_varlong30(batch_fd, total_read, 3);
368 write_varlong30(batch_fd, total_written, 3);
369 write_varlong30(batch_fd, stats.total_size, 3);
370 if (protocol_version >= 29) {
371 write_varlong30(batch_fd, stats.flist_buildtime, 3);
372 write_varlong30(batch_fd, stats.flist_xfertime, 3);
377 static void output_itemized_counts(const char *prefix, int *counts)
379 static char *labels[] = { "reg", "dir", "link", "dev", "special" };
380 char buf[1024], *pre = " (";
382 int total = counts[0];
384 counts[0] -= counts[1] + counts[2] + counts[3] + counts[4];
385 for (j = 0; j < 5; j++) {
387 len += snprintf(buf+len, sizeof buf - len - 2,
389 pre, labels[j], comma_num(counts[j]));
396 rprintf(FINFO, "%s: %s%s\n", prefix, comma_num(total), buf);
399 static const char *bytes_per_sec_human_dnum(void)
401 if (starttime == (time_t)-1 || endtime == (time_t)-1)
403 return human_dnum((total_written + total_read) / (0.5 + (endtime - starttime)), 2);
406 static void output_summary(void)
408 if (INFO_GTE(STATS, 2)) {
409 rprintf(FCLIENT, "\n");
410 output_itemized_counts("Number of files", &stats.num_files);
411 if (protocol_version >= 29)
412 output_itemized_counts("Number of created files", &stats.created_files);
413 if (protocol_version >= 31)
414 output_itemized_counts("Number of deleted files", &stats.deleted_files);
415 rprintf(FINFO,"Number of regular files transferred: %s\n",
416 comma_num(stats.xferred_files));
417 rprintf(FINFO,"Total file size: %s bytes\n",
418 human_num(stats.total_size));
419 rprintf(FINFO,"Total transferred file size: %s bytes\n",
420 human_num(stats.total_transferred_size));
421 rprintf(FINFO,"Literal data: %s bytes\n",
422 human_num(stats.literal_data));
423 rprintf(FINFO,"Matched data: %s bytes\n",
424 human_num(stats.matched_data));
425 rprintf(FINFO,"File list size: %s\n",
426 human_num(stats.flist_size));
427 if (stats.flist_buildtime) {
429 "File list generation time: %s seconds\n",
430 comma_dnum((double)stats.flist_buildtime / 1000, 3));
432 "File list transfer time: %s seconds\n",
433 comma_dnum((double)stats.flist_xfertime / 1000, 3));
435 rprintf(FINFO,"Total bytes sent: %s\n",
436 human_num(total_written));
437 rprintf(FINFO,"Total bytes received: %s\n",
438 human_num(total_read));
441 if (INFO_GTE(STATS, 1)) {
442 rprintf(FCLIENT, "\n");
444 "sent %s bytes received %s bytes %s bytes/sec\n",
445 human_num(total_written), human_num(total_read),
446 bytes_per_sec_human_dnum());
447 rprintf(FINFO, "total size is %s speedup is %s%s\n",
448 human_num(stats.total_size),
449 comma_dnum((double)stats.total_size / (total_written+total_read), 2),
450 write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : "");
459 * If our C library can get malloc statistics, then show them to FINFO
461 static void show_malloc_stats(void)
468 rprintf(FCLIENT, "\n");
469 rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
470 (int)getpid(), am_server ? "server " : "",
471 am_daemon ? "daemon " : "", who_am_i());
472 rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
474 rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
476 rprintf(FINFO, " smblks: %10ld\n",
478 rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
480 rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
482 rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
483 (long)mi.arena + mi.hblkhd);
484 rprintf(FINFO, " usmblks: %10ld\n",
486 rprintf(FINFO, " fsmblks: %10ld\n",
488 rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
490 rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
492 rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
494 #endif /* HAVE_MALLINFO */
498 /* Start the remote shell. cmd may be NULL to use the default. */
499 static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc,
500 int *f_in_p, int *f_out_p)
503 char *args[MAX_ARGS], *need_to_free = NULL;
507 if (!read_batch && !local_server) {
508 char *t, *f, in_quote = '\0';
509 char *rsh_env = getenv(RSYNC_RSH_ENV);
514 cmd = need_to_free = strdup(cmd);
518 for (t = f = cmd; *f; f++) {
521 /* Comparison leaves rooms for server_options(). */
522 if (argc >= MAX_ARGS - MAX_SERVER_ARGS)
525 while (*f != ' ' || in_quote) {
529 "Missing trailing-%c in remote-shell command.\n",
531 exit_cleanup(RERR_SYNTAX);
536 if (*f == '\'' || *f == '"') {
541 if (*f == in_quote && *++f != in_quote) {
551 /* check to see if we've already been given '-l user' in
552 * the remote-shell command */
553 for (i = 0; i < argc-1; i++) {
554 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
559 /* remsh (on HPUX) takes the arguments the other way around */
560 args[argc++] = machine;
561 if (user && !(daemon_over_rsh && dash_l_set)) {
566 if (user && !(daemon_over_rsh && dash_l_set)) {
570 args[argc++] = machine;
573 args[argc++] = rsync_path;
575 if (blocking_io < 0) {
577 if ((cp = strrchr(cmd, '/')) != NULL)
581 if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
585 server_options(args,&argc);
587 if (argc >= MAX_ARGS - 2)
593 if (!daemon_over_rsh) {
594 while (remote_argc > 0) {
595 if (argc >= MAX_ARGS - 1) {
597 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
598 exit_cleanup(RERR_SYNTAX);
600 if (**remote_argv == '-') {
601 if (asprintf(args + argc++, "./%s", *remote_argv++) < 0)
602 out_of_memory("do_cmd");
604 args[argc++] = *remote_argv++;
611 if (DEBUG_GTE(CMD, 2)) {
612 for (i = 0; i < argc; i++)
613 rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]);
614 rprintf(FCLIENT, "\n");
618 int from_gen_pipe[2];
619 set_allow_inc_recurse();
620 if (fd_pair(from_gen_pipe) < 0) {
621 rsyserr(FERROR, errno, "pipe");
622 exit_cleanup(RERR_IPC);
624 batch_gen_fd = from_gen_pipe[0];
625 *f_out_p = from_gen_pipe[1];
627 pid = (pid_t)-1; /* no child pid */
631 } else if (local_server) {
632 /* If the user didn't request --[no-]whole-file, force
633 * it on, but only if we're not batch processing. */
634 if (whole_file < 0 && !write_batch)
636 set_allow_inc_recurse();
637 pid = local_child(argc, args, f_in_p, f_out_p, child_main);
642 pid = piped_child(args, f_in_p, f_out_p);
646 if (protect_args && !daemon_over_rsh)
647 send_protected_args(*f_out_p, args);
656 out_of_memory("do_cmd");
657 return 0; /* not reached */
660 /* The receiving side operates in one of two modes:
662 * 1. it receives any number of files into a destination directory,
663 * placing them according to their names in the file-list.
665 * 2. it receives a single file and saves it using the name in the
666 * destination path instead of its file-list name. This requires a
667 * "local name" for writing out the destination file.
669 * So, our task is to figure out what mode/local-name we need.
670 * For mode 1, we change into the destination directory and return NULL.
671 * For mode 2, we change into the directory containing the destination
672 * file (if we aren't already there) and return the local-name. */
673 static char *get_local_name(struct file_list *flist, char *dest_path)
679 if (DEBUG_GTE(RECV, 1)) {
680 rprintf(FINFO, "get_local_name count=%d %s\n",
681 file_total, NS(dest_path));
684 if (!dest_path || list_only)
687 /* Treat an empty string as a copy into the current directory. */
691 if (daemon_filter_list.head) {
692 char *slash = strrchr(dest_path, '/');
693 if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0')))
697 if ((*dest_path != '.' || dest_path[1] != '\0')
698 && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0
699 || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) {
700 rprintf(FERROR, "ERROR: daemon has excluded destination \"%s\"\n",
702 exit_cleanup(RERR_FILESELECT);
708 /* See what currently exists at the destination. */
709 if ((statret = do_stat(dest_path, &st)) == 0) {
710 /* If the destination is a dir, enter it and use mode 1. */
711 if (S_ISDIR(st.st_mode)) {
712 if (!change_dir(dest_path, CD_NORMAL)) {
713 rsyserr(FERROR, errno, "change_dir#1 %s failed",
714 full_fname(dest_path));
715 exit_cleanup(RERR_FILESELECT);
717 filesystem_dev = st.st_dev; /* ensures --force works right w/-x */
720 if (file_total > 1) {
722 "ERROR: destination must be a directory when"
723 " copying more than 1 file\n");
724 exit_cleanup(RERR_FILESELECT);
726 if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) {
728 "ERROR: cannot overwrite non-directory"
729 " with a directory\n");
730 exit_cleanup(RERR_FILESELECT);
732 } else if (errno != ENOENT) {
733 /* If we don't know what's at the destination, fail. */
734 rsyserr(FERROR, errno, "ERROR: cannot stat destination %s",
735 full_fname(dest_path));
736 exit_cleanup(RERR_FILESELECT);
739 cp = strrchr(dest_path, '/');
741 /* If we need a destination directory because the transfer is not
742 * of a single non-directory or the user has requested one via a
743 * destination path ending in a slash, create one and use mode 1. */
744 if (file_total > 1 || (cp && !cp[1])) {
745 /* Lop off the final slash (if any). */
751 "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);
823 out_of_memory("check_alt_basis_dirs");
824 if (slash && strncmp(bdir, "../", 3) == 0) {
825 /* We want to remove only one leading "../" prefix for
826 * the directory we couldn't create in dry-run mode:
827 * this ensures that any other ".." references get
828 * evaluated the same as they would for a live copy. */
830 pathjoin(new, len, curr_dir, bdir + 3);
833 pathjoin(new, len, curr_dir, bdir);
834 basis_dir[j] = bdir = new;
836 if (do_stat(bdir, &st) < 0)
837 rprintf(FWARNING, "%s arg does not exist: %s\n", dest_option, bdir);
838 else if (!S_ISDIR(st.st_mode))
839 rprintf(FWARNING, "%s arg is not a dir: %s\n", dest_option, bdir);
843 /* This is only called by the sender. */
844 static void read_final_goodbye(int f_in, int f_out)
848 char xname[MAXPATHLEN];
850 shutting_down = True;
852 if (protocol_version < 29)
855 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
856 if (protocol_version >= 31 && i == NDX_DONE) {
858 write_ndx(f_out, NDX_DONE);
860 if (batch_gen_fd >= 0) {
861 while (read_int(batch_gen_fd) != NDX_DEL_STATS) {}
862 read_del_stats(batch_gen_fd);
864 write_int(f_out, NDX_DONE);
866 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
871 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
873 exit_cleanup(RERR_PROTOCOL);
877 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
879 struct file_list *flist;
882 if (DEBUG_GTE(SEND, 1))
883 rprintf(FINFO, "server_sender starting pid=%d\n", (int)getpid());
885 if (am_daemon && lp_write_only(module_id)) {
886 rprintf(FERROR, "ERROR: module is write only\n");
887 exit_cleanup(RERR_SYNTAX);
889 if (am_daemon && read_only && remove_source_files) {
891 "ERROR: --remove-%s-files cannot be used with a read-only module\n",
892 remove_source_files == 1 ? "source" : "sent");
893 exit_cleanup(RERR_SYNTAX);
896 rprintf(FERROR, "ERROR: do_server_sender called without args\n");
897 exit_cleanup(RERR_SYNTAX);
900 become_copy_as_user();
903 if (!relative_paths) {
904 if (!change_dir(dir, CD_NORMAL)) {
905 rsyserr(FERROR, errno, "change_dir#3 %s failed",
907 exit_cleanup(RERR_FILESELECT);
913 if (argc == 0 && (recurse || xfer_dirs || list_only)) {
919 flist = send_file_list(f_out,argc,argv);
920 if (!flist || flist->used == 0) {
921 /* Make sure input buffering is off so we can't hang in noop_io_until_death(). */
922 io_end_buffering_in(0);
923 /* TODO: we should really exit in a more controlled manner. */
927 io_start_buffering_in(f_in);
929 send_files(f_in, f_out);
930 io_flush(FULL_FLUSH);
932 if (protocol_version >= 24)
933 read_final_goodbye(f_in, f_out);
934 io_flush(FULL_FLUSH);
939 static int do_recv(int f_in, int f_out, char *local_name)
945 /* The receiving side mustn't obey this, or an existing symlink that
946 * points to an identical file won't be replaced by the referent. */
947 copy_links = copy_dirlinks = copy_unsafe_links = 0;
949 #ifdef SUPPORT_HARD_LINKS
950 if (preserve_hard_links && !inc_recurse)
951 match_hard_links(first_flist);
954 if (fd_pair(error_pipe) < 0) {
955 rsyserr(FERROR, errno, "pipe failed in do_recv");
956 exit_cleanup(RERR_IPC);
962 if (backup_dir_len > 1)
963 backup_dir_buf[backup_dir_len-1] = '\0';
964 ret = do_stat(backup_dir_buf, &st);
965 if (ret != 0 || !S_ISDIR(st.st_mode)) {
967 rprintf(FERROR, "The backup-dir is not a directory: %s\n", backup_dir_buf);
968 exit_cleanup(RERR_SYNTAX);
970 if (errno != ENOENT) {
971 rprintf(FERROR, "Failed to stat %s: %s\n", backup_dir_buf, strerror(errno));
972 exit_cleanup(RERR_FILEIO);
974 if (INFO_GTE(BACKUP, 1))
975 rprintf(FINFO, "(new) backup_dir is %s\n", backup_dir_buf);
976 } else if (INFO_GTE(BACKUP, 1))
977 rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
978 if (backup_dir_len > 1)
979 backup_dir_buf[backup_dir_len-1] = '/';
982 io_flush(FULL_FLUSH);
984 if ((pid = do_fork()) == -1) {
985 rsyserr(FERROR, errno, "fork failed in do_recv");
986 exit_cleanup(RERR_IPC);
991 send_msgs_to_gen = am_server;
993 close(error_pipe[0]);
995 /* We can't let two processes write to the socket at one time. */
996 io_end_multiplex_out(MPLX_SWITCHING);
1000 f_out = error_pipe[1];
1002 bwlimit_writemax = 0; /* receiver doesn't need to do this */
1005 io_start_buffering_in(f_in);
1006 io_start_multiplex_out(f_out);
1008 recv_files(f_in, f_out, local_name);
1009 io_flush(FULL_FLUSH);
1012 if (output_needs_newline) {
1013 fputc('\n', stdout);
1014 output_needs_newline = 0;
1017 write_int(f_out, NDX_DONE);
1018 send_msg(MSG_STATS, (char*)&stats.total_read, sizeof stats.total_read, 0);
1019 io_flush(FULL_FLUSH);
1021 /* Handle any keep-alive packets from the post-processing work
1022 * that the generator does. */
1023 if (protocol_version >= 29) {
1024 kluge_around_eof = -1;
1026 /* This should only get stopped via a USR2 signal. */
1027 read_final_goodbye(f_in, f_out);
1029 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
1031 exit_cleanup(RERR_PROTOCOL);
1034 /* Finally, we go to sleep until our parent kills us with a
1035 * USR2 signal. We sleep for a short time, as on some OSes
1036 * a signal won't interrupt a sleep! */
1042 flist_receiving_enabled = True;
1044 io_end_multiplex_in(MPLX_SWITCHING);
1045 if (write_batch && !am_server)
1048 close(error_pipe[1]);
1052 f_in = error_pipe[0];
1054 io_start_buffering_out(f_out);
1055 io_start_multiplex_in(f_in);
1057 #ifdef SUPPORT_HARD_LINKS
1058 if (preserve_hard_links && inc_recurse) {
1059 struct file_list *flist;
1060 for (flist = first_flist; flist; flist = flist->next)
1061 match_hard_links(flist);
1065 generate_files(f_out, local_name);
1068 io_flush(FULL_FLUSH);
1069 shutting_down = True;
1070 if (protocol_version >= 24) {
1071 /* send a final goodbye message */
1072 write_ndx(f_out, NDX_DONE);
1074 io_flush(FULL_FLUSH);
1077 wait_process_with_flush(pid, &exit_code);
1081 static void do_server_recv(int f_in, int f_out, int argc, char *argv[])
1084 struct file_list *flist;
1085 char *local_name = NULL;
1088 if (filesfrom_fd >= 0 && !msgs2stderr && protocol_version < 31) {
1089 /* We can't mix messages with files-from data on the socket,
1090 * so temporarily turn off info/debug messages. */
1091 negate_output_levels();
1096 if (DEBUG_GTE(RECV, 1))
1097 rprintf(FINFO, "server_recv(%d) starting pid=%d\n", argc, (int)getpid());
1099 if (am_daemon && read_only) {
1100 rprintf(FERROR,"ERROR: module is read only\n");
1101 exit_cleanup(RERR_SYNTAX);
1105 become_copy_as_user();
1108 char *dir = argv[0];
1111 if (!am_daemon && !change_dir(dir, CD_NORMAL)) {
1112 rsyserr(FERROR, errno, "change_dir#4 %s failed",
1114 exit_cleanup(RERR_FILESELECT);
1118 if (protocol_version >= 30)
1119 io_start_multiplex_in(f_in);
1121 io_start_buffering_in(f_in);
1122 recv_filter_list(f_in);
1124 if (filesfrom_fd >= 0) {
1125 /* We need to send the files-from names to the sender at the
1126 * same time that we receive the file-list from them, so we
1127 * need the IO routines to automatically write out the names
1128 * onto our f_out socket as we read the file-list. This
1129 * avoids both deadlock and extra delays/buffers. */
1130 start_filesfrom_forwarding(filesfrom_fd);
1134 flist = recv_file_list(f_in, -1);
1136 rprintf(FERROR,"server_recv: recv_file_list error\n");
1137 exit_cleanup(RERR_FILESELECT);
1139 if (inc_recurse && file_total == 1)
1140 recv_additional_file_list(f_in);
1143 negate_output_levels();
1146 local_name = get_local_name(flist,argv[0]);
1148 /* Now that we know what our destination directory turned out to be,
1149 * we can sanitize the --link-/copy-/compare-dest args correctly. */
1150 if (sanitize_paths) {
1152 for (dir_p = basis_dir; *dir_p; dir_p++)
1153 *dir_p = sanitize_path(NULL, *dir_p, NULL, curr_dir_depth, SP_DEFAULT);
1155 partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, SP_DEFAULT);
1157 check_alt_basis_dirs();
1159 if (daemon_filter_list.head) {
1161 filter_rule_list *elp = &daemon_filter_list;
1163 for (dir_p = basis_dir; *dir_p; dir_p++) {
1166 dir += module_dirlen;
1167 if (check_filter(elp, FLOG, dir, 1) < 0)
1168 goto options_rejected;
1170 if (partial_dir && *partial_dir == '/'
1171 && check_filter(elp, FLOG, partial_dir + module_dirlen, 1) < 0) {
1174 "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 int copy_argv(char *argv[])
1342 for (i = 0; argv[i]; i++) {
1343 if (!(argv[i] = strdup(argv[i]))) {
1344 rprintf (FERROR, "out of memory at %s(%d)\n",
1345 __FILE__, __LINE__);
1354 /* Start a client for either type of remote connection. Work out
1355 * whether the arguments request a remote shell or rsyncd connection,
1356 * and call the appropriate connection function, then run_client.
1358 * Calls either start_socket_client (for sockets) or do_cmd and
1359 * client_run (for ssh). */
1360 static int start_client(int argc, char *argv[])
1362 char *p, *shell_machine = NULL, *shell_user = NULL;
1364 int remote_argc, env_port = rsync_port;
1369 /* Don't clobber argv[] so that ps(1) can still show the right
1371 if ((ret = copy_argv(argv)) != 0)
1374 if (!read_batch) { /* for read_batch, NO source is specified */
1375 char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1376 if (path) { /* source is remote */
1383 if (argc == 1 || **argv == ':')
1384 argc = 0; /* no dest arg */
1385 else if (check_for_hostspec(*argv, &dummy_host, &dummy_port)) {
1387 "The source and destination cannot both be remote.\n");
1388 exit_cleanup(RERR_SYNTAX);
1390 remote_argc--; /* don't count dest */
1393 if (filesfrom_host && *filesfrom_host
1394 && strcmp(filesfrom_host, shell_machine) != 0) {
1396 "--files-from hostname is not the same as the transfer hostname\n");
1397 exit_cleanup(RERR_SYNTAX);
1401 daemon_over_rsh = shell_cmd ? 1 : -1;
1402 } else { /* source is local, check dest arg */
1407 remote_argv = argv + argc;
1409 static char *dotarg[1] = { "." };
1411 remote_argv = dotarg;
1415 path = check_for_hostspec(p, &shell_machine, &rsync_port);
1416 if (path && filesfrom_host && *filesfrom_host
1417 && strcmp(filesfrom_host, shell_machine) != 0) {
1419 "--files-from hostname is not the same as the transfer hostname\n");
1420 exit_cleanup(RERR_SYNTAX);
1422 if (!path) { /* no hostspec found, so src & dest are local */
1424 if (filesfrom_host) {
1426 "--files-from cannot be remote when the transfer is local\n");
1427 exit_cleanup(RERR_SYNTAX);
1429 shell_machine = NULL;
1431 } else { /* hostspec was found, so dest is remote */
1434 daemon_over_rsh = shell_cmd ? 1 : -1;
1437 } else { /* read_batch */
1439 if (check_for_hostspec(argv[argc-1], &shell_machine, &rsync_port)) {
1440 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1441 exit_cleanup(RERR_SYNTAX);
1443 remote_argv = argv += argc - 1;
1444 remote_argc = argc = 1;
1448 if (!rsync_port && remote_argc && !**remote_argv) /* Turn an empty arg into a dot dir. */
1453 int dummy_port = rsync_port;
1455 /* For local source, extra source args must not have hostspec. */
1456 for (i = 1; i < argc; i++) {
1457 if (check_for_hostspec(argv[i], &dummy_host, &dummy_port)) {
1458 rprintf(FERROR, "Unexpected remote arg: %s\n", argv[i]);
1459 exit_cleanup(RERR_SYNTAX);
1464 int dummy_port = rsync_port;
1466 /* For remote source, any extra source args must have either
1467 * the same hostname or an empty hostname. */
1468 for (i = 1; i < remote_argc; i++) {
1469 char *arg = check_for_hostspec(remote_argv[i], &dummy_host, &dummy_port);
1471 rprintf(FERROR, "Unexpected local arg: %s\n", remote_argv[i]);
1472 rprintf(FERROR, "If arg is a remote file/dir, prefix it with a colon (:).\n");
1473 exit_cleanup(RERR_SYNTAX);
1475 if (*dummy_host && strcmp(dummy_host, shell_machine) != 0) {
1476 rprintf(FERROR, "All source args must come from the same machine.\n");
1477 exit_cleanup(RERR_SYNTAX);
1479 if (rsync_port != dummy_port) {
1480 if (!rsync_port || !dummy_port)
1481 rprintf(FERROR, "All source args must use the same hostspec format.\n");
1483 rprintf(FERROR, "All source args must use the same port number.\n");
1484 exit_cleanup(RERR_SYNTAX);
1486 if (!rsync_port && !*arg) /* Turn an empty arg into a dot dir. */
1488 remote_argv[i] = arg;
1493 rsync_port = RSYNC_PORT;
1495 env_port = rsync_port;
1497 if (daemon_over_rsh < 0)
1498 return start_socket_client(shell_machine, remote_argc, remote_argv, argc, argv);
1500 if (password_file && !daemon_over_rsh) {
1501 rprintf(FERROR, "The --password-file option may only be "
1502 "used when accessing an rsync daemon.\n");
1503 exit_cleanup(RERR_SYNTAX);
1506 if (connect_timeout) {
1507 rprintf(FERROR, "The --contimeout option may only be "
1508 "used when connecting to an rsync daemon.\n");
1509 exit_cleanup(RERR_SYNTAX);
1512 if (shell_machine) {
1513 p = strrchr(shell_machine,'@');
1516 shell_user = shell_machine;
1517 shell_machine = p+1;
1521 if (DEBUG_GTE(CMD, 2)) {
1522 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1523 NS(shell_cmd), NS(shell_machine), NS(shell_user),
1524 NS(remote_argv[0]));
1528 if (daemon_over_rsh)
1529 set_env_num("RSYNC_PORT", env_port);
1532 pid = do_cmd(shell_cmd, shell_machine, shell_user, remote_argv, remote_argc,
1535 /* if we're running an rsync server on the remote host over a
1536 * remote shell command, we need to do the RSYNCD protocol first */
1537 if (daemon_over_rsh) {
1539 tmpret = start_inband_exchange(f_in, f_out, shell_user, remote_argc, remote_argv);
1544 ret = client_run(f_in, f_out, pid, argc, argv);
1553 static void sigusr1_handler(UNUSED(int val))
1555 called_from_signal_handler = 1;
1556 exit_cleanup(RERR_SIGNAL1);
1559 static void sigusr2_handler(UNUSED(int val))
1565 _exit(RERR_PARTIAL);
1569 static void siginfo_handler(UNUSED(int val))
1571 if (!am_server && !INFO_GTE(PROGRESS, 1))
1572 want_progress_now = True;
1575 void remember_children(UNUSED(int val))
1580 /* An empty waitpid() loop was put here by Tridge and we could never
1581 * get him to explain why he put it in, so rather than taking it
1582 * out we're instead saving the child exit statuses for later use.
1583 * The waitpid() loop presumably eliminates all possibility of leaving
1584 * zombie children, maybe that's why he did it. */
1585 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1586 /* save the child's exit status */
1587 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1588 if (pid_stat_table[cnt].pid == 0) {
1589 pid_stat_table[cnt].pid = pid;
1590 pid_stat_table[cnt].status = status;
1596 #ifndef HAVE_SIGACTION
1597 signal(SIGCHLD, remember_children);
1603 * This routine catches signals and tries to send them to gdb.
1605 * Because it's called from inside a signal handler it ought not to
1606 * use too many library routines.
1608 * @todo Perhaps use "screen -X" instead/as well, to help people
1609 * debugging without easy access to X. Perhaps use an environment
1610 * variable, or just call a script?
1612 * @todo The /proc/ magic probably only works on Linux (and
1613 * Solaris?) Can we be more portable?
1615 #ifdef MAINTAINER_MODE
1616 const char *get_panic_action(void)
1618 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1622 return "xterm -display :0 -T Panic -n Panic -e gdb /proc/%d/exe %d";
1627 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1629 * This signal handler is only installed if we were configured with
1630 * --enable-maintainer-mode. Perhaps it should always be on and we
1631 * should just look at the environment variable, but I'm a bit leery
1632 * of a signal sending us into a busy loop.
1634 static void rsync_panic_handler(UNUSED(int whatsig))
1637 int ret, pid_int = getpid();
1639 snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(), pid_int, pid_int);
1641 /* Unless we failed to execute gdb, we allow the process to
1642 * continue. I'm not sure if that's right. */
1643 ret = shell_exec(cmd_buf);
1650 int main(int argc,char *argv[])
1657 #ifdef HAVE_SIGACTION
1658 # ifdef HAVE_SIGPROCMASK
1661 sigemptyset(&sigmask);
1663 sigact.sa_flags = SA_NOCLDSTOP;
1665 SIGACTMASK(SIGUSR1, sigusr1_handler);
1666 SIGACTMASK(SIGUSR2, sigusr2_handler);
1667 SIGACTMASK(SIGCHLD, remember_children);
1668 #ifdef MAINTAINER_MODE
1669 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1670 SIGACTMASK(SIGFPE, rsync_panic_handler);
1671 SIGACTMASK(SIGABRT, rsync_panic_handler);
1672 SIGACTMASK(SIGBUS, rsync_panic_handler);
1675 SIGACTMASK(SIGINFO, siginfo_handler);
1678 SIGACTMASK(SIGVTALRM, siginfo_handler);
1681 starttime = time(NULL);
1684 am_root = our_uid == 0;
1686 memset(&stats, 0, sizeof(stats));
1688 /* Even a non-daemon runs needs the default config values to be set, e.g.
1689 * lp_dont_compress() is queried when no --skip-compress option is set. */
1690 reset_daemon_vars();
1694 exit_cleanup(RERR_SYNTAX);
1697 /* Get the umask for use in permission calculations. We no longer set
1698 * it to zero; that is ugly and pointless now that all the callers that
1699 * relied on it have been reeducated to work with default ACLs. */
1700 umask(orig_umask = umask(0));
1702 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1703 setlocale(LC_CTYPE, "");
1706 if (!parse_arguments(&argc, (const char ***) &argv)) {
1708 exit_cleanup(RERR_SYNTAX);
1711 && poptDupArgv(argc, (const char **)argv, &cooked_argc, (const char ***)&cooked_argv) != 0)
1712 out_of_memory("main");
1714 SIGACTMASK(SIGINT, sig_int);
1715 SIGACTMASK(SIGHUP, sig_int);
1716 SIGACTMASK(SIGTERM, sig_int);
1717 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1718 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1721 /* Ignore SIGPIPE; we consistently check error codes and will
1723 SIGACTION(SIGPIPE, SIG_IGN);
1725 SIGACTION(SIGXFSZ, SIG_IGN);
1728 /* Initialize change_dir() here because on some old systems getcwd
1729 * (implemented by forking "pwd" and reading its output) doesn't
1730 * work when there are other child processes. Also, on all systems
1731 * that implement getcwd that way "pwd" can't be found after chroot. */
1732 change_dir(NULL, CD_NORMAL);
1734 if ((write_batch || read_batch) && !am_server) {
1735 open_batch_files(); /* sets batch_fd */
1737 read_stream_flags(batch_fd);
1739 write_stream_flags(batch_fd);
1741 if (write_batch < 0)
1748 } else if (am_daemon)
1749 return daemon_main();
1751 if (am_server && protect_args) {
1752 char buf[MAXPATHLEN];
1754 read_args(STDIN_FILENO, NULL, buf, sizeof buf, 1, &argv, &argc, NULL);
1755 if (!parse_arguments(&argc, (const char ***) &argv)) {
1757 exit_cleanup(RERR_SYNTAX);
1763 exit_cleanup(RERR_SYNTAX);
1767 set_nonblocking(STDIN_FILENO);
1768 set_nonblocking(STDOUT_FILENO);
1770 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1771 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1774 ret = start_client(argc, argv);
1776 exit_cleanup(RERR_STARTCLIENT);