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) 2003-2022 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 mkpath_dest_arg;
61 extern int file_total;
64 extern int protect_args;
65 extern int relative_paths;
66 extern int sanitize_paths;
67 extern int curr_dir_depth;
68 extern int curr_dir_len;
70 extern int rsync_port;
71 extern int whole_file;
72 extern int read_batch;
73 extern int write_batch;
76 extern int sock_f_out;
77 extern int filesfrom_fd;
78 extern int connect_timeout;
79 extern int send_msgs_to_gen;
80 extern dev_t filesystem_dev;
81 extern pid_t cleanup_child_pid;
82 extern size_t bwlimit_writemax;
83 extern unsigned int module_dirlen;
84 extern BOOL flist_receiving_enabled;
85 extern BOOL want_progress_now;
86 extern BOOL shutting_down;
87 extern int backup_dir_len;
88 extern int basis_dir_cnt;
89 extern int default_af_hint;
90 extern int stdout_format_has_i;
91 extern struct stats stats;
92 extern char *stdout_format;
93 extern char *logfile_format;
94 extern char *filesfrom_host;
95 extern char *partial_dir;
96 extern char *rsync_path;
97 extern char *shell_cmd;
98 extern char *password_file;
99 extern char *backup_dir;
100 extern char *copy_as;
102 extern char curr_dir[MAXPATHLEN];
103 extern char backup_dir_buf[MAXPATHLEN];
104 extern char *basis_dir[MAX_BASIS_DIRS+1];
105 extern struct file_list *first_flist;
106 extern filter_rule_list daemon_filter_list;
110 int am_receiver = 0; /* Only set to 1 after the receiver/generator fork. */
111 int am_generator = 0; /* Only set to 1 after the receiver/generator fork. */
112 int local_server = 0;
113 int daemon_connection = 0; /* 0 = no daemon, 1 = daemon via remote shell, -1 = daemon via socket */
114 mode_t orig_umask = 0;
115 int batch_gen_fd = -1;
116 int sender_keeps_checksum = 0;
117 int raw_argc, cooked_argc;
118 char **raw_argv, **cooked_argv;
120 /* There's probably never more than at most 2 outstanding child processes,
121 * but set it higher, just in case. */
122 #define MAXCHILDPROCS 7
124 #ifdef HAVE_SIGACTION
125 # ifdef HAVE_SIGPROCMASK
126 # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
128 # define SIGACTMASK(n,h) SIGACTION(n,h)
130 static struct sigaction sigact;
136 } pid_stat_table[MAXCHILDPROCS];
138 static time_t starttime, endtime;
139 static int64 total_read, total_written;
141 static void show_malloc_stats(void);
143 /* Works like waitpid(), but if we already harvested the child pid in our
144 * remember_children(), we succeed instead of returning an error. */
145 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
150 waited_pid = waitpid(pid, status_ptr, flags);
151 } while (waited_pid == -1 && errno == EINTR);
153 if (waited_pid == -1 && errno == ECHILD) {
154 /* Status of requested child no longer available: check to
155 * see if it was processed by remember_children(). */
157 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
158 if (pid == pid_stat_table[cnt].pid) {
159 *status_ptr = pid_stat_table[cnt].status;
160 pid_stat_table[cnt].pid = 0;
169 int shell_exec(const char *cmd)
171 char *shell = getenv("RSYNC_SHELL");
178 if ((pid = fork()) < 0)
182 execlp(shell, shell, "-c", cmd, NULL);
186 int ret = wait_process(pid, &status, 0);
187 return ret < 0 ? -1 : status;
190 /* Wait for a process to exit, calling io_flush while waiting. */
191 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
196 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
198 io_flush(FULL_FLUSH);
201 /* TODO: If the child exited on a signal, then log an
202 * appropriate error message. Perhaps we should also accept a
203 * message describing the purpose of the child. Also indicate
204 * this to the caller so that they know something went wrong. */
205 if (waited_pid < 0) {
206 rsyserr(FERROR, errno, "waitpid");
207 *exit_code_ptr = RERR_WAITCHILD;
208 } else if (!WIFEXITED(status)) {
210 if (WCOREDUMP(status))
211 *exit_code_ptr = RERR_CRASHED;
214 if (WIFSIGNALED(status))
215 *exit_code_ptr = RERR_TERMINATED;
217 *exit_code_ptr = RERR_WAITCHILD;
219 *exit_code_ptr = WEXITSTATUS(status);
222 void write_del_stats(int f)
225 write_int(f, NDX_DEL_STATS);
227 write_ndx(f, NDX_DEL_STATS);
228 write_varint(f, stats.deleted_files - stats.deleted_dirs
229 - stats.deleted_symlinks - stats.deleted_devices
230 - stats.deleted_specials);
231 write_varint(f, stats.deleted_dirs);
232 write_varint(f, stats.deleted_symlinks);
233 write_varint(f, stats.deleted_devices);
234 write_varint(f, stats.deleted_specials);
237 void read_del_stats(int f)
239 stats.deleted_files = read_varint(f);
240 stats.deleted_files += stats.deleted_dirs = read_varint(f);
241 stats.deleted_files += stats.deleted_symlinks = read_varint(f);
242 stats.deleted_files += stats.deleted_devices = read_varint(f);
243 stats.deleted_files += stats.deleted_specials = read_varint(f);
246 static void become_copy_as_user()
255 if (DEBUG_GTE(CMD, 2))
256 rprintf(FINFO, "[%s] copy_as=%s\n", who_am_i(), copy_as);
258 if ((gname = strchr(copy_as, ':')) != NULL)
261 if (!user_to_uid(copy_as, &uid, True)) {
262 rprintf(FERROR, "Invalid copy-as user: %s\n", copy_as);
263 exit_cleanup(RERR_SYNTAX);
267 if (!group_to_gid(gname, &gid, True)) {
268 rprintf(FERROR, "Invalid copy-as group: %s\n", gname);
269 exit_cleanup(RERR_SYNTAX);
273 if ((pw = getpwuid(uid)) == NULL) {
274 rsyserr(FERROR, errno, "getpwuid failed");
275 exit_cleanup(RERR_SYNTAX);
280 if (setgid(gid) < 0) {
281 rsyserr(FERROR, errno, "setgid failed");
282 exit_cleanup(RERR_SYNTAX);
284 #ifdef HAVE_SETGROUPS
285 if (setgroups(1, &gid)) {
286 rsyserr(FERROR, errno, "setgroups failed");
287 exit_cleanup(RERR_SYNTAX);
290 #ifdef HAVE_INITGROUPS
291 if (!gname && initgroups(copy_as, gid) < 0) {
292 rsyserr(FERROR, errno, "initgroups failed");
293 exit_cleanup(RERR_SYNTAX);
302 rsyserr(FERROR, errno, "setuid failed");
303 exit_cleanup(RERR_SYNTAX);
308 am_root = (our_uid == ROOT_UID);
314 /* This function gets called from all 3 processes. We want the client side
315 * to actually output the text, but the sender is the only process that has
316 * all the stats we need. So, if we're a client sender, we do the report.
317 * If we're a server sender, we write the stats on the supplied fd. If
318 * we're the client receiver we read the stats from the supplied fd and do
319 * the report. All processes might also generate a set of debug stats, if
320 * the verbose level is high enough (this is the only thing that the
321 * generator process and the server receiver ever do here). */
322 static void handle_stats(int f)
324 endtime = time(NULL);
326 /* Cache two stats because the read/write code can change it. */
327 total_read = stats.total_read;
328 total_written = stats.total_written;
330 if (INFO_GTE(STATS, 3)) {
331 /* These come out from every process */
340 if (f == -1 || !am_sender)
346 write_varlong30(f, total_read, 3);
347 write_varlong30(f, total_written, 3);
348 write_varlong30(f, stats.total_size, 3);
349 if (protocol_version >= 29) {
350 write_varlong30(f, stats.flist_buildtime, 3);
351 write_varlong30(f, stats.flist_xfertime, 3);
357 /* this is the client */
359 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
361 else if (!am_sender) {
362 /* Read the first two in opposite order because the meaning of
363 * read/write swaps when switching from sender to receiver. */
364 total_written = read_varlong30(f, 3);
365 total_read = read_varlong30(f, 3);
366 stats.total_size = read_varlong30(f, 3);
367 if (protocol_version >= 29) {
368 stats.flist_buildtime = read_varlong30(f, 3);
369 stats.flist_xfertime = read_varlong30(f, 3);
371 } else if (write_batch) {
372 /* The --read-batch process is going to be a client
373 * receiver, so we need to give it the stats. */
374 write_varlong30(batch_fd, total_read, 3);
375 write_varlong30(batch_fd, total_written, 3);
376 write_varlong30(batch_fd, stats.total_size, 3);
377 if (protocol_version >= 29) {
378 write_varlong30(batch_fd, stats.flist_buildtime, 3);
379 write_varlong30(batch_fd, stats.flist_xfertime, 3);
384 static void output_itemized_counts(const char *prefix, int *counts)
386 static char *labels[] = { "reg", "dir", "link", "dev", "special" };
387 char buf[1024], *pre = " (";
389 int total = counts[0];
391 counts[0] -= counts[1] + counts[2] + counts[3] + counts[4];
392 for (j = 0; j < 5; j++) {
394 len += snprintf(buf+len, sizeof buf - len - 2,
396 pre, labels[j], comma_num(counts[j]));
403 rprintf(FINFO, "%s: %s%s\n", prefix, comma_num(total), buf);
406 static const char *bytes_per_sec_human_dnum(void)
408 if (starttime == (time_t)-1 || endtime == (time_t)-1)
410 return human_dnum((total_written + total_read) / (0.5 + (endtime - starttime)), 2);
413 static void output_summary(void)
415 if (INFO_GTE(STATS, 2)) {
416 rprintf(FCLIENT, "\n");
417 output_itemized_counts("Number of files", &stats.num_files);
418 if (protocol_version >= 29)
419 output_itemized_counts("Number of created files", &stats.created_files);
420 if (protocol_version >= 31)
421 output_itemized_counts("Number of deleted files", &stats.deleted_files);
422 rprintf(FINFO,"Number of regular files transferred: %s\n",
423 comma_num(stats.xferred_files));
424 rprintf(FINFO,"Total file size: %s bytes\n",
425 human_num(stats.total_size));
426 rprintf(FINFO,"Total transferred file size: %s bytes\n",
427 human_num(stats.total_transferred_size));
428 rprintf(FINFO,"Literal data: %s bytes\n",
429 human_num(stats.literal_data));
430 rprintf(FINFO,"Matched data: %s bytes\n",
431 human_num(stats.matched_data));
432 rprintf(FINFO,"File list size: %s\n",
433 human_num(stats.flist_size));
434 if (stats.flist_buildtime) {
436 "File list generation time: %s seconds\n",
437 comma_dnum((double)stats.flist_buildtime / 1000, 3));
439 "File list transfer time: %s seconds\n",
440 comma_dnum((double)stats.flist_xfertime / 1000, 3));
442 rprintf(FINFO,"Total bytes sent: %s\n",
443 human_num(total_written));
444 rprintf(FINFO,"Total bytes received: %s\n",
445 human_num(total_read));
448 if (INFO_GTE(STATS, 1)) {
449 rprintf(FCLIENT, "\n");
451 "sent %s bytes received %s bytes %s bytes/sec\n",
452 human_num(total_written), human_num(total_read),
453 bytes_per_sec_human_dnum());
454 rprintf(FINFO, "total size is %s speedup is %s%s\n",
455 human_num(stats.total_size),
456 comma_dnum((double)stats.total_size / (total_written+total_read), 2),
457 write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : "");
466 * If our C library can get malloc statistics, then show them to FINFO
468 static void show_malloc_stats(void)
470 #ifdef MEM_ALLOC_INFO
471 struct MEM_ALLOC_INFO mi = MEM_ALLOC_INFO(); /* mallinfo or mallinfo2 */
473 rprintf(FCLIENT, "\n");
474 rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
475 (int)getpid(), am_server ? "server " : "",
476 am_daemon ? "daemon " : "", who_am_i());
478 #define PRINT_ALLOC_NUM(title, descr, num) \
479 rprintf(FINFO, " %-11s%10" SIZE_T_FMT_MOD "d (" descr ")\n", \
480 title ":", (SIZE_T_FMT_CAST)(num));
482 PRINT_ALLOC_NUM("arena", "bytes from sbrk", mi.arena);
483 PRINT_ALLOC_NUM("ordblks", "chunks not in use", mi.ordblks);
484 PRINT_ALLOC_NUM("smblks", "free fastbin blocks", mi.smblks);
485 PRINT_ALLOC_NUM("hblks", "chunks from mmap", mi.hblks);
486 PRINT_ALLOC_NUM("hblkhd", "bytes from mmap", mi.hblkhd);
487 PRINT_ALLOC_NUM("allmem", "bytes from sbrk + mmap", mi.arena + mi.hblkhd);
488 PRINT_ALLOC_NUM("usmblks", "always 0", mi.usmblks);
489 PRINT_ALLOC_NUM("fsmblks", "bytes in freed fastbin blocks", mi.fsmblks);
490 PRINT_ALLOC_NUM("uordblks", "bytes used", mi.uordblks);
491 PRINT_ALLOC_NUM("fordblks", "bytes free", mi.fordblks);
492 PRINT_ALLOC_NUM("keepcost", "bytes in releasable chunk", mi.keepcost);
494 #undef PRINT_ALLOC_NUM
496 #endif /* MEM_ALLOC_INFO */
500 /* Start the remote shell. cmd may be NULL to use the default. */
501 static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc,
502 int *f_in_p, int *f_out_p)
505 char *args[MAX_ARGS], *need_to_free = NULL;
509 if (!read_batch && !local_server) {
510 char *t, *f, in_quote = '\0';
511 char *rsh_env = getenv(RSYNC_RSH_ENV);
516 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 /* NOTE: must preserve t == start of command name until the end of the args handling! */
552 if ((t = strrchr(cmd, '/')) != NULL)
557 /* Check to see if we've already been given '-l user' in the remote-shell command. */
558 for (i = 0; i < argc-1; i++) {
559 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
564 /* remsh (on HPUX) takes the arguments the other way around */
565 args[argc++] = machine;
566 if (user && !(daemon_connection && dash_l_set)) {
571 if (user && !(daemon_connection && dash_l_set)) {
576 if (default_af_hint == AF_INET && strcmp(t, "ssh") == 0)
577 args[argc++] = "-4"; /* we're using ssh so we can add a -4 option */
580 if (default_af_hint == AF_INET6 && strcmp(t, "ssh") == 0)
581 args[argc++] = "-6"; /* we're using ssh so we can add a -6 option */
583 args[argc++] = machine;
586 args[argc++] = rsync_path;
588 if (blocking_io < 0 && (strcmp(t, "rsh") == 0 || strcmp(t, "remsh") == 0))
591 if (daemon_connection > 0) {
592 args[argc++] = "--server";
593 args[argc++] = "--daemon";
595 server_options(args, &argc);
597 if (argc >= MAX_ARGS - 2)
603 if (!daemon_connection) {
604 while (remote_argc > 0) {
605 if (argc >= MAX_ARGS - 1) {
607 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
608 exit_cleanup(RERR_SYNTAX);
610 args[argc++] = safe_arg(NULL, *remote_argv++);
617 if (DEBUG_GTE(CMD, 2)) {
618 for (i = 0; i < argc; i++)
619 rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]);
620 rprintf(FCLIENT, "\n");
624 int from_gen_pipe[2];
625 set_allow_inc_recurse();
626 if (fd_pair(from_gen_pipe) < 0) {
627 rsyserr(FERROR, errno, "pipe");
628 exit_cleanup(RERR_IPC);
630 batch_gen_fd = from_gen_pipe[0];
631 *f_out_p = from_gen_pipe[1];
633 pid = (pid_t)-1; /* no child pid */
637 } else if (local_server) {
638 /* If the user didn't request --[no-]whole-file, force
639 * it on, but only if we're not batch processing. */
640 if (whole_file < 0 && !write_batch)
642 set_allow_inc_recurse();
643 pid = local_child(argc, args, f_in_p, f_out_p, child_main);
648 pid = piped_child(args, f_in_p, f_out_p);
652 if (protect_args && !daemon_connection)
653 send_protected_args(*f_out_p, args);
662 /* The receiving side operates in one of two modes:
664 * 1. it receives any number of files into a destination directory,
665 * placing them according to their names in the file-list.
667 * 2. it receives a single file and saves it using the name in the
668 * destination path instead of its file-list name. This requires a
669 * "local name" for writing out the destination file.
671 * So, our task is to figure out what mode/local-name we need.
672 * For mode 1, we change into the destination directory and return NULL.
673 * For mode 2, we change into the directory containing the destination
674 * file (if we aren't already there) and return the local-name. */
675 static char *get_local_name(struct file_list *flist, char *dest_path)
678 int statret, trailing_slash;
681 if (DEBUG_GTE(RECV, 1)) {
682 rprintf(FINFO, "get_local_name count=%d %s\n",
683 file_total, NS(dest_path));
686 if (!dest_path || list_only)
689 /* Treat an empty string as a copy into the current directory. */
693 if (daemon_filter_list.head) {
694 char *slash = strrchr(dest_path, '/');
695 if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0')))
699 if ((*dest_path != '.' || dest_path[1] != '\0')
700 && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0
701 || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) {
702 rprintf(FERROR, "ERROR: daemon has excluded destination \"%s\"\n",
704 exit_cleanup(RERR_FILESELECT);
710 /* See what currently exists at the destination. */
711 statret = do_stat(dest_path, &st);
712 cp = strrchr(dest_path, '/');
713 trailing_slash = cp && !cp[1];
715 if (mkpath_dest_arg && statret < 0 && (cp || file_total > 1)) {
716 int save_errno = errno;
717 int ret = make_path(dest_path, file_total > 1 && !trailing_slash ? 0 : MKP_DROP_NAME);
720 if (ret && (INFO_GTE(NAME, 1) || stdout_format_has_i)) {
721 if (file_total == 1 || trailing_slash)
723 rprintf(FINFO, "created %d director%s for %s\n", ret, ret == 1 ? "y" : "ies", dest_path);
724 if (file_total == 1 || trailing_slash)
728 statret = do_stat(dest_path, &st);
734 /* If the destination is a dir, enter it and use mode 1. */
735 if (S_ISDIR(st.st_mode)) {
736 if (!change_dir(dest_path, CD_NORMAL)) {
737 rsyserr(FERROR, errno, "change_dir#1 %s failed",
738 full_fname(dest_path));
739 exit_cleanup(RERR_FILESELECT);
741 filesystem_dev = st.st_dev; /* ensures --force works right w/-x */
744 if (file_total > 1) {
746 "ERROR: destination must be a directory when"
747 " copying more than 1 file\n");
748 exit_cleanup(RERR_FILESELECT);
750 if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) {
752 "ERROR: cannot overwrite non-directory"
753 " with a directory\n");
754 exit_cleanup(RERR_FILESELECT);
756 } else if (errno != ENOENT) {
757 /* If we don't know what's at the destination, fail. */
758 rsyserr(FERROR, errno, "ERROR: cannot stat destination %s",
759 full_fname(dest_path));
760 exit_cleanup(RERR_FILESELECT);
763 /* If we need a destination directory because the transfer is not
764 * of a single non-directory or the user has requested one via a
765 * destination path ending in a slash, create one and use mode 1. */
766 if (file_total > 1 || trailing_slash) {
768 *cp = '\0'; /* Lop off the final slash (if any). */
771 rprintf(FERROR, "ERROR: destination path is not a directory\n");
772 exit_cleanup(RERR_SYNTAX);
775 if (do_mkdir(dest_path, ACCESSPERMS) != 0) {
777 rsyserr(FERROR, errno, "mkdir %s failed",
778 full_fname(dest_path));
779 exit_cleanup(RERR_FILEIO);
782 if (flist->high >= flist->low
783 && strcmp(flist->files[flist->low]->basename, ".") == 0)
784 flist->files[0]->flags |= FLAG_DIR_CREATED;
786 if (INFO_GTE(NAME, 1) || stdout_format_has_i)
787 rprintf(FINFO, "created directory %s\n", dest_path);
790 /* Indicate that dest dir doesn't really exist. */
794 if (!change_dir(dest_path, dry_run > 1 ? CD_SKIP_CHDIR : CD_NORMAL)) {
795 rsyserr(FERROR, errno, "change_dir#2 %s failed",
796 full_fname(dest_path));
797 exit_cleanup(RERR_FILESELECT);
803 /* Otherwise, we are writing a single file, possibly on top of an
804 * existing non-directory. Change to the item's parent directory
805 * (if it has a path component), return the basename of the
806 * destination file as the local name, and use mode 2. */
814 if (!change_dir(dest_path, CD_NORMAL)) {
815 rsyserr(FERROR, errno, "change_dir#3 %s failed",
816 full_fname(dest_path));
817 exit_cleanup(RERR_FILESELECT);
824 /* This function checks on our alternate-basis directories. If we're in
825 * dry-run mode and the destination dir does not yet exist, we'll try to
826 * tweak any dest-relative paths to make them work for a dry-run (the
827 * destination dir must be in curr_dir[] when this function is called).
828 * We also warn about any arg that is non-existent or not a directory. */
829 static void check_alt_basis_dirs(void)
832 char *slash = strrchr(curr_dir, '/');
835 for (j = 0; j < basis_dir_cnt; j++) {
836 char *bdir = basis_dir[j];
837 int bd_len = strlen(bdir);
838 if (bd_len > 1 && bdir[bd_len-1] == '/')
839 bdir[--bd_len] = '\0';
840 if (dry_run > 1 && *bdir != '/') {
841 int len = curr_dir_len + 1 + bd_len + 1;
842 char *new = new_array(char, len);
843 if (slash && strncmp(bdir, "../", 3) == 0) {
844 /* We want to remove only one leading "../" prefix for
845 * the directory we couldn't create in dry-run mode:
846 * this ensures that any other ".." references get
847 * evaluated the same as they would for a live copy. */
849 pathjoin(new, len, curr_dir, bdir + 3);
852 pathjoin(new, len, curr_dir, bdir);
853 basis_dir[j] = bdir = new;
855 if (do_stat(bdir, &st) < 0)
856 rprintf(FWARNING, "%s arg does not exist: %s\n", alt_dest_opt(0), bdir);
857 else if (!S_ISDIR(st.st_mode))
858 rprintf(FWARNING, "%s arg is not a dir: %s\n", alt_dest_opt(0), bdir);
862 /* This is only called by the sender. */
863 static void read_final_goodbye(int f_in, int f_out)
867 char xname[MAXPATHLEN];
869 shutting_down = True;
871 if (protocol_version < 29)
874 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
875 if (protocol_version >= 31 && i == NDX_DONE) {
877 write_ndx(f_out, NDX_DONE);
879 if (batch_gen_fd >= 0) {
880 while (read_int(batch_gen_fd) != NDX_DEL_STATS) {}
881 read_del_stats(batch_gen_fd);
883 write_int(f_out, NDX_DONE);
885 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
890 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
892 exit_cleanup(RERR_PROTOCOL);
896 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
898 struct file_list *flist;
901 if (DEBUG_GTE(SEND, 1))
902 rprintf(FINFO, "server_sender starting pid=%d\n", (int)getpid());
904 if (am_daemon && lp_write_only(module_id)) {
905 rprintf(FERROR, "ERROR: module is write only\n");
906 exit_cleanup(RERR_SYNTAX);
908 if (am_daemon && read_only && remove_source_files) {
910 "ERROR: --remove-%s-files cannot be used with a read-only module\n",
911 remove_source_files == 1 ? "source" : "sent");
912 exit_cleanup(RERR_SYNTAX);
915 rprintf(FERROR, "ERROR: do_server_sender called without args\n");
916 exit_cleanup(RERR_SYNTAX);
919 become_copy_as_user();
922 if (!relative_paths) {
923 if (!change_dir(dir, CD_NORMAL)) {
924 rsyserr(FERROR, errno, "change_dir#3 %s failed",
926 exit_cleanup(RERR_FILESELECT);
932 if (argc == 0 && (recurse || xfer_dirs || list_only)) {
938 flist = send_file_list(f_out,argc,argv);
939 if (!flist || flist->used == 0) {
940 /* Make sure input buffering is off so we can't hang in noop_io_until_death(). */
941 io_end_buffering_in(0);
942 /* TODO: we should really exit in a more controlled manner. */
946 io_start_buffering_in(f_in);
948 send_files(f_in, f_out);
949 io_flush(FULL_FLUSH);
951 if (protocol_version >= 24)
952 read_final_goodbye(f_in, f_out);
953 io_flush(FULL_FLUSH);
958 static int do_recv(int f_in, int f_out, char *local_name)
964 /* The receiving side mustn't obey this, or an existing symlink that
965 * points to an identical file won't be replaced by the referent. */
966 copy_links = copy_dirlinks = copy_unsafe_links = 0;
968 #ifdef SUPPORT_HARD_LINKS
969 if (preserve_hard_links && !inc_recurse)
970 match_hard_links(first_flist);
973 if (fd_pair(error_pipe) < 0) {
974 rsyserr(FERROR, errno, "pipe failed in do_recv");
975 exit_cleanup(RERR_IPC);
981 if (backup_dir_len > 1)
982 backup_dir_buf[backup_dir_len-1] = '\0';
983 ret = do_stat(backup_dir_buf, &st);
984 if (ret != 0 || !S_ISDIR(st.st_mode)) {
986 rprintf(FERROR, "The backup-dir is not a directory: %s\n", backup_dir_buf);
987 exit_cleanup(RERR_SYNTAX);
989 if (errno != ENOENT) {
990 rprintf(FERROR, "Failed to stat %s: %s\n", backup_dir_buf, strerror(errno));
991 exit_cleanup(RERR_FILEIO);
993 if (INFO_GTE(BACKUP, 1))
994 rprintf(FINFO, "(new) backup_dir is %s\n", backup_dir_buf);
995 } else if (INFO_GTE(BACKUP, 1))
996 rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
997 if (backup_dir_len > 1)
998 backup_dir_buf[backup_dir_len-1] = '/';
1003 int ret = do_stat(tmpdir, &st);
1004 if (ret < 0 || !S_ISDIR(st.st_mode)) {
1006 rprintf(FERROR, "The temp-dir is not a directory: %s\n", tmpdir);
1007 exit_cleanup(RERR_SYNTAX);
1009 if (errno == ENOENT) {
1010 rprintf(FERROR, "The temp-dir does not exist: %s\n", tmpdir);
1011 exit_cleanup(RERR_SYNTAX);
1013 rprintf(FERROR, "Failed to stat temp-dir %s: %s\n", tmpdir, strerror(errno));
1014 exit_cleanup(RERR_FILEIO);
1018 io_flush(FULL_FLUSH);
1020 if ((pid = do_fork()) == -1) {
1021 rsyserr(FERROR, errno, "fork failed in do_recv");
1022 exit_cleanup(RERR_IPC);
1027 send_msgs_to_gen = am_server;
1029 close(error_pipe[0]);
1031 /* We can't let two processes write to the socket at one time. */
1032 io_end_multiplex_out(MPLX_SWITCHING);
1036 f_out = error_pipe[1];
1038 bwlimit_writemax = 0; /* receiver doesn't need to do this */
1041 io_start_buffering_in(f_in);
1042 io_start_multiplex_out(f_out);
1044 recv_files(f_in, f_out, local_name);
1045 io_flush(FULL_FLUSH);
1048 if (output_needs_newline) {
1049 fputc('\n', stdout);
1050 output_needs_newline = 0;
1053 write_int(f_out, NDX_DONE);
1054 send_msg(MSG_STATS, (char*)&stats.total_read, sizeof stats.total_read, 0);
1055 io_flush(FULL_FLUSH);
1057 /* Handle any keep-alive packets from the post-processing work
1058 * that the generator does. */
1059 if (protocol_version >= 29) {
1060 kluge_around_eof = -1;
1062 /* This should only get stopped via a USR2 signal. */
1063 read_final_goodbye(f_in, f_out);
1065 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
1067 exit_cleanup(RERR_PROTOCOL);
1070 /* Finally, we go to sleep until our parent kills us with a
1071 * USR2 signal. We sleep for a short time, as on some OSes
1072 * a signal won't interrupt a sleep! */
1078 flist_receiving_enabled = True;
1080 io_end_multiplex_in(MPLX_SWITCHING);
1081 if (write_batch && !am_server)
1084 close(error_pipe[1]);
1088 f_in = error_pipe[0];
1090 io_start_buffering_out(f_out);
1091 io_start_multiplex_in(f_in);
1093 #ifdef SUPPORT_HARD_LINKS
1094 if (preserve_hard_links && inc_recurse) {
1095 struct file_list *flist;
1096 for (flist = first_flist; flist; flist = flist->next)
1097 match_hard_links(flist);
1101 generate_files(f_out, local_name);
1104 io_flush(FULL_FLUSH);
1105 shutting_down = True;
1106 if (protocol_version >= 24) {
1107 /* send a final goodbye message */
1108 write_ndx(f_out, NDX_DONE);
1110 io_flush(FULL_FLUSH);
1113 wait_process_with_flush(pid, &exit_code);
1117 static void do_server_recv(int f_in, int f_out, int argc, char *argv[])
1120 struct file_list *flist;
1121 char *local_name = NULL;
1124 if (filesfrom_fd >= 0 && msgs2stderr != 1 && protocol_version < 31) {
1125 /* We can't mix messages with files-from data on the socket,
1126 * so temporarily turn off info/debug messages. */
1127 negate_output_levels();
1132 if (DEBUG_GTE(RECV, 1))
1133 rprintf(FINFO, "server_recv(%d) starting pid=%d\n", argc, (int)getpid());
1135 if (am_daemon && read_only) {
1136 rprintf(FERROR,"ERROR: module is read only\n");
1137 exit_cleanup(RERR_SYNTAX);
1141 become_copy_as_user();
1144 char *dir = argv[0];
1147 if (!am_daemon && !change_dir(dir, CD_NORMAL)) {
1148 rsyserr(FERROR, errno, "change_dir#4 %s failed",
1150 exit_cleanup(RERR_FILESELECT);
1154 if (protocol_version >= 30)
1155 io_start_multiplex_in(f_in);
1157 io_start_buffering_in(f_in);
1158 recv_filter_list(f_in);
1160 if (filesfrom_fd >= 0) {
1161 /* We need to send the files-from names to the sender at the
1162 * same time that we receive the file-list from them, so we
1163 * need the IO routines to automatically write out the names
1164 * onto our f_out socket as we read the file-list. This
1165 * avoids both deadlock and extra delays/buffers. */
1166 start_filesfrom_forwarding(filesfrom_fd);
1170 flist = recv_file_list(f_in, -1);
1172 rprintf(FERROR,"server_recv: recv_file_list error\n");
1173 exit_cleanup(RERR_FILESELECT);
1175 if (inc_recurse && file_total == 1)
1176 recv_additional_file_list(f_in);
1179 negate_output_levels();
1182 local_name = get_local_name(flist,argv[0]);
1184 /* Now that we know what our destination directory turned out to be,
1185 * we can sanitize the --link-/copy-/compare-dest args correctly. */
1186 if (sanitize_paths) {
1188 for (dir_p = basis_dir; *dir_p; dir_p++)
1189 *dir_p = sanitize_path(NULL, *dir_p, NULL, curr_dir_depth, SP_DEFAULT);
1191 partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, SP_DEFAULT);
1193 check_alt_basis_dirs();
1195 if (daemon_filter_list.head) {
1197 filter_rule_list *elp = &daemon_filter_list;
1199 for (dir_p = basis_dir; *dir_p; dir_p++) {
1202 dir += module_dirlen;
1203 if (check_filter(elp, FLOG, dir, 1) < 0)
1204 goto options_rejected;
1206 if (partial_dir && *partial_dir == '/'
1207 && check_filter(elp, FLOG, partial_dir + module_dirlen, 1) < 0) {
1209 rprintf(FERROR, "Your options have been rejected by the server.\n");
1210 exit_cleanup(RERR_SYNTAX);
1214 exit_code = do_recv(f_in, f_out, local_name);
1215 exit_cleanup(exit_code);
1219 int child_main(int argc, char *argv[])
1221 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1226 void start_server(int f_in, int f_out, int argc, char *argv[])
1228 set_nonblocking(f_in);
1229 set_nonblocking(f_out);
1231 io_set_sock_fds(f_in, f_out);
1232 setup_protocol(f_out, f_in);
1234 if (protocol_version >= 23)
1235 io_start_multiplex_out(f_out);
1236 if (am_daemon && io_timeout && protocol_version >= 31)
1237 send_msg_int(MSG_IO_TIMEOUT, io_timeout);
1240 keep_dirlinks = 0; /* Must be disabled on the sender. */
1241 if (need_messages_from_generator)
1242 io_start_multiplex_in(f_in);
1244 io_start_buffering_in(f_in);
1245 recv_filter_list(f_in);
1246 do_server_sender(f_in, f_out, argc, argv);
1248 do_server_recv(f_in, f_out, argc, argv);
1252 /* This is called once the connection has been negotiated. It is used
1253 * for rsyncd, remote-shell, and local connections. */
1254 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
1256 struct file_list *flist = NULL;
1257 int exit_code = 0, exit_code2 = 0;
1258 char *local_name = NULL;
1260 cleanup_child_pid = pid;
1262 set_nonblocking(f_in);
1263 set_nonblocking(f_out);
1266 io_set_sock_fds(f_in, f_out);
1267 setup_protocol(f_out,f_in);
1269 /* We set our stderr file handle to blocking because ssh might have
1270 * set it to non-blocking. This can be particularly troublesome if
1271 * stderr is a clone of stdout, because ssh would have set our stdout
1272 * to non-blocking at the same time (which can easily cause us to lose
1273 * output from our print statements). This kluge shouldn't cause ssh
1274 * any problems for how we use it. Note also that we delayed setting
1275 * this until after the above protocol setup so that we know for sure
1276 * that ssh is done twiddling its file descriptors. */
1277 set_blocking(STDERR_FILENO);
1280 keep_dirlinks = 0; /* Must be disabled on the sender. */
1283 && (log_format_has(stdout_format, 'C')
1284 || log_format_has(logfile_format, 'C')))
1285 sender_keeps_checksum = 1;
1287 if (protocol_version >= 30)
1288 io_start_multiplex_out(f_out);
1290 io_start_buffering_out(f_out);
1291 if (protocol_version >= 31 || (!filesfrom_host && protocol_version >= 23))
1292 io_start_multiplex_in(f_in);
1294 io_start_buffering_in(f_in);
1295 send_filter_list(f_out);
1297 filesfrom_fd = f_in;
1299 if (write_batch && !am_server)
1300 start_write_batch(f_out);
1302 become_copy_as_user();
1304 flist = send_file_list(f_out, argc, argv);
1305 if (DEBUG_GTE(FLIST, 3))
1306 rprintf(FINFO,"file list sent\n");
1308 if (protocol_version < 31 && filesfrom_host && protocol_version >= 23)
1309 io_start_multiplex_in(f_in);
1311 io_flush(NORMAL_FLUSH);
1312 send_files(f_in, f_out);
1313 io_flush(FULL_FLUSH);
1315 if (protocol_version >= 24)
1316 read_final_goodbye(f_in, f_out);
1318 if (DEBUG_GTE(EXIT, 2))
1319 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
1320 io_flush(FULL_FLUSH);
1321 wait_process_with_flush(pid, &exit_code);
1324 io_flush(FULL_FLUSH);
1325 exit_cleanup(exit_code);
1329 if (protocol_version >= 23)
1330 io_start_multiplex_in(f_in);
1331 if (need_messages_from_generator)
1332 io_start_multiplex_out(f_out);
1334 io_start_buffering_out(f_out);
1337 become_copy_as_user();
1339 send_filter_list(read_batch ? -1 : f_out);
1341 if (filesfrom_fd >= 0) {
1342 start_filesfrom_forwarding(filesfrom_fd);
1346 if (write_batch && !am_server)
1347 start_write_batch(f_in);
1348 flist = recv_file_list(f_in, -1);
1349 if (inc_recurse && file_total == 1)
1350 recv_additional_file_list(f_in);
1352 if (flist && flist->used > 0) {
1353 local_name = get_local_name(flist, argv[0]);
1355 check_alt_basis_dirs();
1357 exit_code2 = do_recv(f_in, f_out, local_name);
1364 if (DEBUG_GTE(RECV, 1))
1365 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
1366 io_flush(FULL_FLUSH);
1367 wait_process_with_flush(pid, &exit_code);
1370 return MAX(exit_code, exit_code2);
1373 static void dup_argv(char *argv[])
1377 for (i = 0; argv[i]; i++)
1378 argv[i] = strdup(argv[i]);
1382 /* Start a client for either type of remote connection. Work out
1383 * whether the arguments request a remote shell or rsyncd connection,
1384 * and call the appropriate connection function, then run_client.
1386 * Calls either start_socket_client (for sockets) or do_cmd and
1387 * client_run (for ssh). */
1388 static int start_client(int argc, char *argv[])
1390 char *p, *shell_machine = NULL, *shell_user = NULL;
1392 int remote_argc, env_port = rsync_port;
1397 /* Don't clobber argv[] so that ps(1) can still show the right
1401 if (!read_batch) { /* for read_batch, NO source is specified */
1402 char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1403 if (path) { /* source is remote */
1410 if (argc == 1 || **argv == ':')
1411 argc = 0; /* no dest arg */
1412 else if (check_for_hostspec(*argv, &dummy_host, &dummy_port)) {
1414 "The source and destination cannot both be remote.\n");
1415 exit_cleanup(RERR_SYNTAX);
1417 remote_argc--; /* don't count dest */
1420 if (filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) {
1422 "--files-from hostname is not the same as the transfer hostname\n");
1423 exit_cleanup(RERR_SYNTAX);
1427 daemon_connection = shell_cmd ? 1 : -1;
1428 } else { /* source is local, check dest arg */
1433 remote_argv = argv + argc;
1435 static char *dotarg[1] = { "." };
1437 remote_argv = dotarg;
1441 path = check_for_hostspec(p, &shell_machine, &rsync_port);
1442 if (path && filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) {
1444 "--files-from hostname is not the same as the transfer hostname\n");
1445 exit_cleanup(RERR_SYNTAX);
1447 if (!path) { /* no hostspec found, so src & dest are local */
1449 if (filesfrom_host) {
1451 "--files-from cannot be remote when the transfer is local\n");
1452 exit_cleanup(RERR_SYNTAX);
1454 shell_machine = NULL;
1456 } else { /* hostspec was found, so dest is remote */
1459 daemon_connection = shell_cmd ? 1 : -1;
1462 } else { /* read_batch */
1464 if (check_for_hostspec(argv[argc-1], &shell_machine, &rsync_port)) {
1465 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1466 exit_cleanup(RERR_SYNTAX);
1468 remote_argv = argv += argc - 1;
1469 remote_argc = argc = 1;
1473 if (!rsync_port && remote_argc && !**remote_argv) /* Turn an empty arg into a dot dir. */
1478 int dummy_port = rsync_port;
1482 /* For local source, extra source args must not have hostspec. */
1483 for (i = 1; i < argc; i++) {
1486 rprintf(FERROR, "Empty source arg specified.\n");
1487 exit_cleanup(RERR_SYNTAX);
1489 if (check_for_hostspec(argv[i], &dummy_host, &dummy_port)) {
1490 rprintf(FERROR, "Unexpected remote arg: %s\n", argv[i]);
1491 exit_cleanup(RERR_SYNTAX);
1496 int dummy_port = rsync_port;
1498 /* For remote source, any extra source args must have either
1499 * the same hostname or an empty hostname. */
1500 for (i = 1; i < remote_argc; i++) {
1501 char *arg = check_for_hostspec(remote_argv[i], &dummy_host, &dummy_port);
1503 rprintf(FERROR, "Unexpected local arg: %s\n", remote_argv[i]);
1504 rprintf(FERROR, "If arg is a remote file/dir, prefix it with a colon (:).\n");
1505 exit_cleanup(RERR_SYNTAX);
1507 if (*dummy_host && strcmp(dummy_host, shell_machine) != 0) {
1508 rprintf(FERROR, "All source args must come from the same machine.\n");
1509 exit_cleanup(RERR_SYNTAX);
1511 if (rsync_port != dummy_port) {
1512 if (!rsync_port || !dummy_port)
1513 rprintf(FERROR, "All source args must use the same hostspec format.\n");
1515 rprintf(FERROR, "All source args must use the same port number.\n");
1516 exit_cleanup(RERR_SYNTAX);
1518 if (!rsync_port && !*arg) /* Turn an empty arg into a dot dir. */
1520 remote_argv[i] = arg;
1525 rsync_port = RSYNC_PORT;
1527 env_port = rsync_port;
1529 if (daemon_connection < 0)
1530 return start_socket_client(shell_machine, remote_argc, remote_argv, argc, argv);
1532 if (password_file && !daemon_connection) {
1533 rprintf(FERROR, "The --password-file option may only be "
1534 "used when accessing an rsync daemon.\n");
1535 exit_cleanup(RERR_SYNTAX);
1538 if (connect_timeout) {
1539 rprintf(FERROR, "The --contimeout option may only be "
1540 "used when connecting to an rsync daemon.\n");
1541 exit_cleanup(RERR_SYNTAX);
1544 if (shell_machine) {
1545 p = strrchr(shell_machine,'@');
1548 shell_user = shell_machine;
1549 shell_machine = p+1;
1553 if (DEBUG_GTE(CMD, 2)) {
1554 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1555 NS(shell_cmd), NS(shell_machine), NS(shell_user),
1556 NS(remote_argv[0]));
1560 if (daemon_connection)
1561 set_env_num("RSYNC_PORT", env_port);
1566 pid = do_cmd(shell_cmd, shell_machine, shell_user, remote_argv, remote_argc, &f_in, &f_out);
1568 /* if we're running an rsync server on the remote host over a
1569 * remote shell command, we need to do the RSYNCD protocol first */
1570 if (daemon_connection) {
1572 tmpret = start_inband_exchange(f_in, f_out, shell_user, remote_argc, remote_argv);
1577 ret = client_run(f_in, f_out, pid, argc, argv);
1586 static void sigusr1_handler(UNUSED(int val))
1588 called_from_signal_handler = 1;
1589 exit_cleanup(RERR_SIGNAL1);
1592 static void sigusr2_handler(UNUSED(int val))
1598 _exit(RERR_PARTIAL);
1602 #if defined SIGINFO || defined SIGVTALRM
1603 static void siginfo_handler(UNUSED(int val))
1605 if (!am_server && !INFO_GTE(PROGRESS, 1))
1606 want_progress_now = True;
1610 void remember_children(UNUSED(int val))
1615 /* An empty waitpid() loop was put here by Tridge and we could never
1616 * get him to explain why he put it in, so rather than taking it
1617 * out we're instead saving the child exit statuses for later use.
1618 * The waitpid() loop presumably eliminates all possibility of leaving
1619 * zombie children, maybe that's why he did it. */
1620 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1621 /* save the child's exit status */
1622 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1623 if (pid_stat_table[cnt].pid == 0) {
1624 pid_stat_table[cnt].pid = pid;
1625 pid_stat_table[cnt].status = status;
1631 #ifndef HAVE_SIGACTION
1632 signal(SIGCHLD, remember_children);
1637 * This routine catches signals and tries to send them to gdb.
1639 * Because it's called from inside a signal handler it ought not to
1640 * use too many library routines.
1642 * @todo Perhaps use "screen -X" instead/as well, to help people
1643 * debugging without easy access to X. Perhaps use an environment
1644 * variable, or just call a script?
1646 * @todo The /proc/ magic probably only works on Linux (and
1647 * Solaris?) Can we be more portable?
1649 #ifdef MAINTAINER_MODE
1650 const char *get_panic_action(void)
1652 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1656 return "xterm -display :0 -T Panic -n Panic -e gdb /proc/%d/exe %d";
1660 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1662 * This signal handler is only installed if we were configured with
1663 * --enable-maintainer-mode. Perhaps it should always be on and we
1664 * should just look at the environment variable, but I'm a bit leery
1665 * of a signal sending us into a busy loop.
1667 static void rsync_panic_handler(UNUSED(int whatsig))
1670 int ret, pid_int = getpid();
1672 snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(), pid_int, pid_int);
1674 /* Unless we failed to execute gdb, we allow the process to
1675 * continue. I'm not sure if that's right. */
1676 ret = shell_exec(cmd_buf);
1682 static void unset_env_var(const char *var)
1684 #ifdef HAVE_UNSETENV
1689 if (asprintf(&mem, "%s=", var) < 0)
1690 out_of_memory("unset_env_var");
1699 int main(int argc,char *argv[])
1706 #ifdef HAVE_SIGACTION
1707 # ifdef HAVE_SIGPROCMASK
1710 sigemptyset(&sigmask);
1712 sigact.sa_flags = SA_NOCLDSTOP;
1714 SIGACTMASK(SIGUSR1, sigusr1_handler);
1715 SIGACTMASK(SIGUSR2, sigusr2_handler);
1716 SIGACTMASK(SIGCHLD, remember_children);
1717 #ifdef MAINTAINER_MODE
1718 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1719 SIGACTMASK(SIGFPE, rsync_panic_handler);
1720 SIGACTMASK(SIGABRT, rsync_panic_handler);
1721 SIGACTMASK(SIGBUS, rsync_panic_handler);
1724 SIGACTMASK(SIGINFO, siginfo_handler);
1727 SIGACTMASK(SIGVTALRM, siginfo_handler);
1730 starttime = time(NULL);
1733 am_root = our_uid == ROOT_UID;
1735 unset_env_var("DISPLAY");
1737 memset(&stats, 0, sizeof(stats));
1739 /* Even a non-daemon runs needs the default config values to be set, e.g.
1740 * lp_dont_compress() is queried when no --skip-compress option is set. */
1741 reset_daemon_vars();
1745 exit_cleanup(RERR_SYNTAX);
1748 /* Get the umask for use in permission calculations. We no longer set
1749 * it to zero; that is ugly and pointless now that all the callers that
1750 * relied on it have been reeducated to work with default ACLs. */
1751 umask(orig_umask = umask(0));
1753 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1754 setlocale(LC_CTYPE, "");
1755 setlocale(LC_NUMERIC, "");
1758 if (!parse_arguments(&argc, (const char ***) &argv)) {
1760 exit_cleanup(RERR_SYNTAX);
1763 && poptDupArgv(argc, (const char **)argv, &cooked_argc, (const char ***)&cooked_argv) != 0)
1764 out_of_memory("main");
1766 SIGACTMASK(SIGINT, sig_int);
1767 SIGACTMASK(SIGHUP, sig_int);
1768 SIGACTMASK(SIGTERM, sig_int);
1769 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1770 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1773 /* Ignore SIGPIPE; we consistently check error codes and will
1775 SIGACTION(SIGPIPE, SIG_IGN);
1777 SIGACTION(SIGXFSZ, SIG_IGN);
1780 /* Initialize change_dir() here because on some old systems getcwd
1781 * (implemented by forking "pwd" and reading its output) doesn't
1782 * work when there are other child processes. Also, on all systems
1783 * that implement getcwd that way "pwd" can't be found after chroot. */
1784 change_dir(NULL, CD_NORMAL);
1786 if ((write_batch || read_batch) && !am_server) {
1787 open_batch_files(); /* sets batch_fd */
1789 read_stream_flags(batch_fd);
1791 write_stream_flags(batch_fd);
1793 if (write_batch < 0)
1800 } else if (am_daemon)
1801 return daemon_main();
1803 if (am_server && protect_args) {
1804 char buf[MAXPATHLEN];
1806 read_args(STDIN_FILENO, NULL, buf, sizeof buf, 1, &argv, &argc, NULL);
1807 if (!parse_arguments(&argc, (const char ***) &argv)) {
1809 exit_cleanup(RERR_SYNTAX);
1815 exit_cleanup(RERR_SYNTAX);
1819 set_nonblocking(STDIN_FILENO);
1820 set_nonblocking(STDOUT_FILENO);
1822 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1823 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1826 ret = start_client(argc, argv);
1828 exit_cleanup(RERR_STARTCLIENT);