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 old_style_args;
52 extern int msgs2stderr;
55 extern int copy_links;
56 extern int copy_dirlinks;
57 extern int copy_unsafe_links;
58 extern int keep_dirlinks;
59 extern int preserve_hard_links;
60 extern int protocol_version;
61 extern int mkpath_dest_arg;
62 extern int file_total;
65 extern int protect_args;
66 extern int relative_paths;
67 extern int sanitize_paths;
68 extern int curr_dir_depth;
69 extern int curr_dir_len;
71 extern int rsync_port;
72 extern int whole_file;
73 extern int read_batch;
74 extern int write_batch;
77 extern int sock_f_out;
78 extern int filesfrom_fd;
79 extern int connect_timeout;
80 extern int send_msgs_to_gen;
81 extern dev_t filesystem_dev;
82 extern pid_t cleanup_child_pid;
83 extern size_t bwlimit_writemax;
84 extern unsigned int module_dirlen;
85 extern BOOL flist_receiving_enabled;
86 extern BOOL want_progress_now;
87 extern BOOL shutting_down;
88 extern int backup_dir_len;
89 extern int basis_dir_cnt;
90 extern int default_af_hint;
91 extern int stdout_format_has_i;
92 extern struct stats stats;
93 extern char *stdout_format;
94 extern char *logfile_format;
95 extern char *filesfrom_host;
96 extern char *partial_dir;
97 extern char *rsync_path;
98 extern char *shell_cmd;
99 extern char *password_file;
100 extern char *backup_dir;
101 extern char *copy_as;
103 extern char curr_dir[MAXPATHLEN];
104 extern char backup_dir_buf[MAXPATHLEN];
105 extern char *basis_dir[MAX_BASIS_DIRS+1];
106 extern struct file_list *first_flist;
107 extern filter_rule_list daemon_filter_list, implied_filter_list;
111 int am_receiver = 0; /* Only set to 1 after the receiver/generator fork. */
112 int am_generator = 0; /* Only set to 1 after the receiver/generator fork. */
113 int local_server = 0;
114 int daemon_connection = 0; /* 0 = no daemon, 1 = daemon via remote shell, -1 = daemon via socket */
115 mode_t orig_umask = 0;
116 int batch_gen_fd = -1;
117 int sender_keeps_checksum = 0;
118 int raw_argc, cooked_argc;
119 char **raw_argv, **cooked_argv;
121 /* There's probably never more than at most 2 outstanding child processes,
122 * but set it higher, just in case. */
123 #define MAXCHILDPROCS 7
125 #ifdef HAVE_SIGACTION
126 # ifdef HAVE_SIGPROCMASK
127 # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
129 # define SIGACTMASK(n,h) SIGACTION(n,h)
131 static struct sigaction sigact;
137 } pid_stat_table[MAXCHILDPROCS];
139 static time_t starttime, endtime;
140 static int64 total_read, total_written;
142 static void show_malloc_stats(void);
144 /* Works like waitpid(), but if we already harvested the child pid in our
145 * remember_children(), we succeed instead of returning an error. */
146 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
151 waited_pid = waitpid(pid, status_ptr, flags);
152 } while (waited_pid == -1 && errno == EINTR);
154 if (waited_pid == -1 && errno == ECHILD) {
155 /* Status of requested child no longer available: check to
156 * see if it was processed by remember_children(). */
158 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
159 if (pid == pid_stat_table[cnt].pid) {
160 *status_ptr = pid_stat_table[cnt].status;
161 pid_stat_table[cnt].pid = 0;
170 int shell_exec(const char *cmd)
172 char *shell = getenv("RSYNC_SHELL");
179 if ((pid = fork()) < 0)
183 execlp(shell, shell, "-c", cmd, NULL);
187 int ret = wait_process(pid, &status, 0);
188 return ret < 0 ? -1 : status;
191 /* Wait for a process to exit, calling io_flush while waiting. */
192 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
197 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
199 io_flush(FULL_FLUSH);
202 /* TODO: If the child exited on a signal, then log an
203 * appropriate error message. Perhaps we should also accept a
204 * message describing the purpose of the child. Also indicate
205 * this to the caller so that they know something went wrong. */
206 if (waited_pid < 0) {
207 rsyserr(FERROR, errno, "waitpid");
208 *exit_code_ptr = RERR_WAITCHILD;
209 } else if (!WIFEXITED(status)) {
211 if (WCOREDUMP(status))
212 *exit_code_ptr = RERR_CRASHED;
215 if (WIFSIGNALED(status))
216 *exit_code_ptr = RERR_TERMINATED;
218 *exit_code_ptr = RERR_WAITCHILD;
220 *exit_code_ptr = WEXITSTATUS(status);
223 void write_del_stats(int f)
226 write_int(f, NDX_DEL_STATS);
228 write_ndx(f, NDX_DEL_STATS);
229 write_varint(f, stats.deleted_files - stats.deleted_dirs
230 - stats.deleted_symlinks - stats.deleted_devices
231 - stats.deleted_specials);
232 write_varint(f, stats.deleted_dirs);
233 write_varint(f, stats.deleted_symlinks);
234 write_varint(f, stats.deleted_devices);
235 write_varint(f, stats.deleted_specials);
238 void read_del_stats(int f)
240 stats.deleted_files = read_varint(f);
241 stats.deleted_files += stats.deleted_dirs = read_varint(f);
242 stats.deleted_files += stats.deleted_symlinks = read_varint(f);
243 stats.deleted_files += stats.deleted_devices = read_varint(f);
244 stats.deleted_files += stats.deleted_specials = read_varint(f);
247 static void become_copy_as_user()
256 if (DEBUG_GTE(CMD, 2))
257 rprintf(FINFO, "[%s] copy_as=%s\n", who_am_i(), copy_as);
259 if ((gname = strchr(copy_as, ':')) != NULL)
262 if (!user_to_uid(copy_as, &uid, True)) {
263 rprintf(FERROR, "Invalid copy-as user: %s\n", copy_as);
264 exit_cleanup(RERR_SYNTAX);
268 if (!group_to_gid(gname, &gid, True)) {
269 rprintf(FERROR, "Invalid copy-as group: %s\n", gname);
270 exit_cleanup(RERR_SYNTAX);
274 if ((pw = getpwuid(uid)) == NULL) {
275 rsyserr(FERROR, errno, "getpwuid failed");
276 exit_cleanup(RERR_SYNTAX);
281 if (setgid(gid) < 0) {
282 rsyserr(FERROR, errno, "setgid failed");
283 exit_cleanup(RERR_SYNTAX);
285 #ifdef HAVE_SETGROUPS
286 if (setgroups(1, &gid)) {
287 rsyserr(FERROR, errno, "setgroups failed");
288 exit_cleanup(RERR_SYNTAX);
291 #ifdef HAVE_INITGROUPS
292 if (!gname && initgroups(copy_as, gid) < 0) {
293 rsyserr(FERROR, errno, "initgroups failed");
294 exit_cleanup(RERR_SYNTAX);
303 rsyserr(FERROR, errno, "setuid failed");
304 exit_cleanup(RERR_SYNTAX);
309 am_root = (our_uid == ROOT_UID);
315 /* This function gets called from all 3 processes. We want the client side
316 * to actually output the text, but the sender is the only process that has
317 * all the stats we need. So, if we're a client sender, we do the report.
318 * If we're a server sender, we write the stats on the supplied fd. If
319 * we're the client receiver we read the stats from the supplied fd and do
320 * the report. All processes might also generate a set of debug stats, if
321 * the verbose level is high enough (this is the only thing that the
322 * generator process and the server receiver ever do here). */
323 static void handle_stats(int f)
325 endtime = time(NULL);
327 /* Cache two stats because the read/write code can change it. */
328 total_read = stats.total_read;
329 total_written = stats.total_written;
331 if (INFO_GTE(STATS, 3)) {
332 /* These come out from every process */
341 if (f == -1 || !am_sender)
347 write_varlong30(f, total_read, 3);
348 write_varlong30(f, total_written, 3);
349 write_varlong30(f, stats.total_size, 3);
350 if (protocol_version >= 29) {
351 write_varlong30(f, stats.flist_buildtime, 3);
352 write_varlong30(f, stats.flist_xfertime, 3);
358 /* this is the client */
360 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
362 else if (!am_sender) {
363 /* Read the first two in opposite order because the meaning of
364 * read/write swaps when switching from sender to receiver. */
365 total_written = read_varlong30(f, 3);
366 total_read = read_varlong30(f, 3);
367 stats.total_size = read_varlong30(f, 3);
368 if (protocol_version >= 29) {
369 stats.flist_buildtime = read_varlong30(f, 3);
370 stats.flist_xfertime = read_varlong30(f, 3);
372 } else if (write_batch) {
373 /* The --read-batch process is going to be a client
374 * receiver, so we need to give it the stats. */
375 write_varlong30(batch_fd, total_read, 3);
376 write_varlong30(batch_fd, total_written, 3);
377 write_varlong30(batch_fd, stats.total_size, 3);
378 if (protocol_version >= 29) {
379 write_varlong30(batch_fd, stats.flist_buildtime, 3);
380 write_varlong30(batch_fd, stats.flist_xfertime, 3);
385 static void output_itemized_counts(const char *prefix, int *counts)
387 static char *labels[] = { "reg", "dir", "link", "dev", "special" };
388 char buf[1024], *pre = " (";
390 int total = counts[0];
392 counts[0] -= counts[1] + counts[2] + counts[3] + counts[4];
393 for (j = 0; j < 5; j++) {
395 len += snprintf(buf+len, sizeof buf - len - 2,
397 pre, labels[j], comma_num(counts[j]));
404 rprintf(FINFO, "%s: %s%s\n", prefix, comma_num(total), buf);
407 static const char *bytes_per_sec_human_dnum(void)
409 if (starttime == (time_t)-1 || endtime == (time_t)-1)
411 return human_dnum((total_written + total_read) / (0.5 + (endtime - starttime)), 2);
414 static void output_summary(void)
416 if (INFO_GTE(STATS, 2)) {
417 rprintf(FCLIENT, "\n");
418 output_itemized_counts("Number of files", &stats.num_files);
419 if (protocol_version >= 29)
420 output_itemized_counts("Number of created files", &stats.created_files);
421 if (protocol_version >= 31)
422 output_itemized_counts("Number of deleted files", &stats.deleted_files);
423 rprintf(FINFO,"Number of regular files transferred: %s\n",
424 comma_num(stats.xferred_files));
425 rprintf(FINFO,"Total file size: %s bytes\n",
426 human_num(stats.total_size));
427 rprintf(FINFO,"Total transferred file size: %s bytes\n",
428 human_num(stats.total_transferred_size));
429 rprintf(FINFO,"Literal data: %s bytes\n",
430 human_num(stats.literal_data));
431 rprintf(FINFO,"Matched data: %s bytes\n",
432 human_num(stats.matched_data));
433 rprintf(FINFO,"File list size: %s\n",
434 human_num(stats.flist_size));
435 if (stats.flist_buildtime) {
437 "File list generation time: %s seconds\n",
438 comma_dnum((double)stats.flist_buildtime / 1000, 3));
440 "File list transfer time: %s seconds\n",
441 comma_dnum((double)stats.flist_xfertime / 1000, 3));
443 rprintf(FINFO,"Total bytes sent: %s\n",
444 human_num(total_written));
445 rprintf(FINFO,"Total bytes received: %s\n",
446 human_num(total_read));
449 if (INFO_GTE(STATS, 1)) {
450 rprintf(FCLIENT, "\n");
452 "sent %s bytes received %s bytes %s bytes/sec\n",
453 human_num(total_written), human_num(total_read),
454 bytes_per_sec_human_dnum());
455 rprintf(FINFO, "total size is %s speedup is %s%s\n",
456 human_num(stats.total_size),
457 comma_dnum((double)stats.total_size / (total_written+total_read), 2),
458 write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : "");
467 * If our C library can get malloc statistics, then show them to FINFO
469 static void show_malloc_stats(void)
471 #ifdef MEM_ALLOC_INFO
472 struct MEM_ALLOC_INFO mi = MEM_ALLOC_INFO(); /* mallinfo or mallinfo2 */
474 rprintf(FCLIENT, "\n");
475 rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
476 (int)getpid(), am_server ? "server " : "",
477 am_daemon ? "daemon " : "", who_am_i());
479 #define PRINT_ALLOC_NUM(title, descr, num) \
480 rprintf(FINFO, " %-11s%10" SIZE_T_FMT_MOD "d (" descr ")\n", \
481 title ":", (SIZE_T_FMT_CAST)(num));
483 PRINT_ALLOC_NUM("arena", "bytes from sbrk", mi.arena);
484 PRINT_ALLOC_NUM("ordblks", "chunks not in use", mi.ordblks);
485 PRINT_ALLOC_NUM("smblks", "free fastbin blocks", mi.smblks);
486 PRINT_ALLOC_NUM("hblks", "chunks from mmap", mi.hblks);
487 PRINT_ALLOC_NUM("hblkhd", "bytes from mmap", mi.hblkhd);
488 PRINT_ALLOC_NUM("allmem", "bytes from sbrk + mmap", mi.arena + mi.hblkhd);
489 PRINT_ALLOC_NUM("usmblks", "always 0", mi.usmblks);
490 PRINT_ALLOC_NUM("fsmblks", "bytes in freed fastbin blocks", mi.fsmblks);
491 PRINT_ALLOC_NUM("uordblks", "bytes used", mi.uordblks);
492 PRINT_ALLOC_NUM("fordblks", "bytes free", mi.fordblks);
493 PRINT_ALLOC_NUM("keepcost", "bytes in releasable chunk", mi.keepcost);
495 #undef PRINT_ALLOC_NUM
497 #endif /* MEM_ALLOC_INFO */
501 /* Start the remote shell. cmd may be NULL to use the default. */
502 static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc,
503 int *f_in_p, int *f_out_p)
506 char *args[MAX_ARGS], *need_to_free = NULL;
510 if (!read_batch && !local_server) {
511 char *t, *f, in_quote = '\0';
512 char *rsh_env = getenv(RSYNC_RSH_ENV);
517 cmd = need_to_free = strdup(cmd);
519 for (t = f = cmd; *f; f++) {
522 /* Comparison leaves rooms for server_options(). */
523 if (argc >= MAX_ARGS - MAX_SERVER_ARGS)
526 while (*f != ' ' || in_quote) {
530 "Missing trailing-%c in remote-shell command.\n",
532 exit_cleanup(RERR_SYNTAX);
537 if (*f == '\'' || *f == '"') {
542 if (*f == in_quote && *++f != in_quote) {
552 /* NOTE: must preserve t == start of command name until the end of the args handling! */
553 if ((t = strrchr(cmd, '/')) != NULL)
558 /* Check to see if we've already been given '-l user' in the remote-shell command. */
559 for (i = 0; i < argc-1; i++) {
560 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
565 /* remsh (on HPUX) takes the arguments the other way around */
566 args[argc++] = machine;
567 if (user && !(daemon_connection && dash_l_set)) {
572 if (user && !(daemon_connection && dash_l_set)) {
577 if (default_af_hint == AF_INET && strcmp(t, "ssh") == 0)
578 args[argc++] = "-4"; /* we're using ssh so we can add a -4 option */
581 if (default_af_hint == AF_INET6 && strcmp(t, "ssh") == 0)
582 args[argc++] = "-6"; /* we're using ssh so we can add a -6 option */
584 args[argc++] = machine;
587 args[argc++] = rsync_path;
589 if (blocking_io < 0 && (strcmp(t, "rsh") == 0 || strcmp(t, "remsh") == 0))
592 if (daemon_connection > 0) {
593 args[argc++] = "--server";
594 args[argc++] = "--daemon";
596 server_options(args, &argc);
598 if (argc >= MAX_ARGS - 2)
604 if (!daemon_connection) {
605 while (remote_argc > 0) {
606 if (argc >= MAX_ARGS - 1) {
608 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
609 exit_cleanup(RERR_SYNTAX);
611 args[argc++] = safe_arg(NULL, *remote_argv++);
618 if (DEBUG_GTE(CMD, 2)) {
619 for (i = 0; i < argc; i++)
620 rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]);
621 rprintf(FCLIENT, "\n");
625 int from_gen_pipe[2];
626 set_allow_inc_recurse();
627 if (fd_pair(from_gen_pipe) < 0) {
628 rsyserr(FERROR, errno, "pipe");
629 exit_cleanup(RERR_IPC);
631 batch_gen_fd = from_gen_pipe[0];
632 *f_out_p = from_gen_pipe[1];
634 pid = (pid_t)-1; /* no child pid */
638 } else if (local_server) {
639 /* If the user didn't request --[no-]whole-file, force
640 * it on, but only if we're not batch processing. */
641 if (whole_file < 0 && !write_batch)
643 set_allow_inc_recurse();
644 pid = local_child(argc, args, f_in_p, f_out_p, child_main);
649 pid = piped_child(args, f_in_p, f_out_p);
653 if (protect_args && !daemon_connection)
654 send_protected_args(*f_out_p, args);
663 /* Older versions turn an empty string as a reference to the current directory.
664 * We now treat this as an error unless --old-args was used. */
665 static char *dot_dir_or_error()
667 if (old_style_args || am_server)
669 rprintf(FERROR, "Empty destination arg specified (use \".\" or see --old-args).\n");
670 exit_cleanup(RERR_SYNTAX);
673 /* The receiving side operates in one of two modes:
675 * 1. it receives any number of files into a destination directory,
676 * placing them according to their names in the file-list.
678 * 2. it receives a single file and saves it using the name in the
679 * destination path instead of its file-list name. This requires a
680 * "local name" for writing out the destination file.
682 * So, our task is to figure out what mode/local-name we need.
683 * For mode 1, we change into the destination directory and return NULL.
684 * For mode 2, we change into the directory containing the destination
685 * file (if we aren't already there) and return the local-name. */
686 static char *get_local_name(struct file_list *flist, char *dest_path)
689 int statret, trailing_slash;
692 if (DEBUG_GTE(RECV, 1)) {
693 rprintf(FINFO, "get_local_name count=%d %s\n",
694 file_total, NS(dest_path));
697 if (!dest_path || list_only)
701 dest_path = dot_dir_or_error();
703 if (daemon_filter_list.head) {
704 char *slash = strrchr(dest_path, '/');
705 if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0')))
709 if ((*dest_path != '.' || dest_path[1] != '\0')
710 && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0
711 || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) {
712 rprintf(FERROR, "ERROR: daemon has excluded destination \"%s\"\n",
714 exit_cleanup(RERR_FILESELECT);
720 /* See what currently exists at the destination. */
721 statret = do_stat(dest_path, &st);
722 cp = strrchr(dest_path, '/');
723 trailing_slash = cp && !cp[1];
725 if (mkpath_dest_arg && statret < 0 && (cp || file_total > 1)) {
726 int save_errno = errno;
727 int ret = make_path(dest_path, file_total > 1 && !trailing_slash ? 0 : MKP_DROP_NAME);
730 if (ret && (INFO_GTE(NAME, 1) || stdout_format_has_i)) {
731 if (file_total == 1 || trailing_slash)
733 rprintf(FINFO, "created %d director%s for %s\n", ret, ret == 1 ? "y" : "ies", dest_path);
734 if (file_total == 1 || trailing_slash)
738 statret = do_stat(dest_path, &st);
744 /* If the destination is a dir, enter it and use mode 1. */
745 if (S_ISDIR(st.st_mode)) {
746 if (!change_dir(dest_path, CD_NORMAL)) {
747 rsyserr(FERROR, errno, "change_dir#1 %s failed",
748 full_fname(dest_path));
749 exit_cleanup(RERR_FILESELECT);
751 filesystem_dev = st.st_dev; /* ensures --force works right w/-x */
754 if (file_total > 1) {
756 "ERROR: destination must be a directory when"
757 " copying more than 1 file\n");
758 exit_cleanup(RERR_FILESELECT);
760 if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) {
762 "ERROR: cannot overwrite non-directory"
763 " with a directory\n");
764 exit_cleanup(RERR_FILESELECT);
766 } else if (errno != ENOENT) {
767 /* If we don't know what's at the destination, fail. */
768 rsyserr(FERROR, errno, "ERROR: cannot stat destination %s",
769 full_fname(dest_path));
770 exit_cleanup(RERR_FILESELECT);
773 /* If we need a destination directory because the transfer is not
774 * of a single non-directory or the user has requested one via a
775 * destination path ending in a slash, create one and use mode 1. */
776 if (file_total > 1 || trailing_slash) {
778 *cp = '\0'; /* Lop off the final slash (if any). */
781 rprintf(FERROR, "ERROR: destination path is not a directory\n");
782 exit_cleanup(RERR_SYNTAX);
785 if (do_mkdir(dest_path, ACCESSPERMS) != 0) {
787 rsyserr(FERROR, errno, "mkdir %s failed",
788 full_fname(dest_path));
789 exit_cleanup(RERR_FILEIO);
792 if (flist->high >= flist->low
793 && strcmp(flist->files[flist->low]->basename, ".") == 0)
794 flist->files[0]->flags |= FLAG_DIR_CREATED;
796 if (INFO_GTE(NAME, 1) || stdout_format_has_i)
797 rprintf(FINFO, "created directory %s\n", dest_path);
800 /* Indicate that dest dir doesn't really exist. */
804 if (!change_dir(dest_path, dry_run > 1 ? CD_SKIP_CHDIR : CD_NORMAL)) {
805 rsyserr(FERROR, errno, "change_dir#2 %s failed",
806 full_fname(dest_path));
807 exit_cleanup(RERR_FILESELECT);
813 /* Otherwise, we are writing a single file, possibly on top of an
814 * existing non-directory. Change to the item's parent directory
815 * (if it has a path component), return the basename of the
816 * destination file as the local name, and use mode 2. */
824 if (!change_dir(dest_path, CD_NORMAL)) {
825 rsyserr(FERROR, errno, "change_dir#3 %s failed",
826 full_fname(dest_path));
827 exit_cleanup(RERR_FILESELECT);
834 /* This function checks on our alternate-basis directories. If we're in
835 * dry-run mode and the destination dir does not yet exist, we'll try to
836 * tweak any dest-relative paths to make them work for a dry-run (the
837 * destination dir must be in curr_dir[] when this function is called).
838 * We also warn about any arg that is non-existent or not a directory. */
839 static void check_alt_basis_dirs(void)
842 char *slash = strrchr(curr_dir, '/');
845 for (j = 0; j < basis_dir_cnt; j++) {
846 char *bdir = basis_dir[j];
847 int bd_len = strlen(bdir);
848 if (bd_len > 1 && bdir[bd_len-1] == '/')
849 bdir[--bd_len] = '\0';
850 if (dry_run > 1 && *bdir != '/') {
851 int len = curr_dir_len + 1 + bd_len + 1;
852 char *new = new_array(char, len);
853 if (slash && strncmp(bdir, "../", 3) == 0) {
854 /* We want to remove only one leading "../" prefix for
855 * the directory we couldn't create in dry-run mode:
856 * this ensures that any other ".." references get
857 * evaluated the same as they would for a live copy. */
859 pathjoin(new, len, curr_dir, bdir + 3);
862 pathjoin(new, len, curr_dir, bdir);
863 basis_dir[j] = bdir = new;
865 if (do_stat(bdir, &st) < 0)
866 rprintf(FWARNING, "%s arg does not exist: %s\n", alt_dest_opt(0), bdir);
867 else if (!S_ISDIR(st.st_mode))
868 rprintf(FWARNING, "%s arg is not a dir: %s\n", alt_dest_opt(0), bdir);
872 /* This is only called by the sender. */
873 static void read_final_goodbye(int f_in, int f_out)
877 char xname[MAXPATHLEN];
879 shutting_down = True;
881 if (protocol_version < 29)
884 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
885 if (protocol_version >= 31 && i == NDX_DONE) {
887 write_ndx(f_out, NDX_DONE);
889 if (batch_gen_fd >= 0) {
890 while (read_int(batch_gen_fd) != NDX_DEL_STATS) {}
891 read_del_stats(batch_gen_fd);
893 write_int(f_out, NDX_DONE);
895 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
900 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
902 exit_cleanup(RERR_PROTOCOL);
906 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
908 struct file_list *flist;
911 if (DEBUG_GTE(SEND, 1))
912 rprintf(FINFO, "server_sender starting pid=%d\n", (int)getpid());
914 if (am_daemon && lp_write_only(module_id)) {
915 rprintf(FERROR, "ERROR: module is write only\n");
916 exit_cleanup(RERR_SYNTAX);
918 if (am_daemon && read_only && remove_source_files) {
920 "ERROR: --remove-%s-files cannot be used with a read-only module\n",
921 remove_source_files == 1 ? "source" : "sent");
922 exit_cleanup(RERR_SYNTAX);
925 rprintf(FERROR, "ERROR: do_server_sender called without args\n");
926 exit_cleanup(RERR_SYNTAX);
929 become_copy_as_user();
932 if (!relative_paths) {
933 if (!change_dir(dir, CD_NORMAL)) {
934 rsyserr(FERROR, errno, "change_dir#3 %s failed",
936 exit_cleanup(RERR_FILESELECT);
942 if (argc == 0 && (recurse || xfer_dirs || list_only)) {
948 flist = send_file_list(f_out,argc,argv);
949 if (!flist || flist->used == 0) {
950 /* Make sure input buffering is off so we can't hang in noop_io_until_death(). */
951 io_end_buffering_in(0);
952 /* TODO: we should really exit in a more controlled manner. */
956 io_start_buffering_in(f_in);
958 send_files(f_in, f_out);
959 io_flush(FULL_FLUSH);
961 if (protocol_version >= 24)
962 read_final_goodbye(f_in, f_out);
963 io_flush(FULL_FLUSH);
968 static int do_recv(int f_in, int f_out, char *local_name)
974 /* The receiving side mustn't obey this, or an existing symlink that
975 * points to an identical file won't be replaced by the referent. */
976 copy_links = copy_dirlinks = copy_unsafe_links = 0;
978 #ifdef SUPPORT_HARD_LINKS
979 if (preserve_hard_links && !inc_recurse)
980 match_hard_links(first_flist);
983 if (fd_pair(error_pipe) < 0) {
984 rsyserr(FERROR, errno, "pipe failed in do_recv");
985 exit_cleanup(RERR_IPC);
991 if (backup_dir_len > 1)
992 backup_dir_buf[backup_dir_len-1] = '\0';
993 ret = do_stat(backup_dir_buf, &st);
994 if (ret != 0 || !S_ISDIR(st.st_mode)) {
996 rprintf(FERROR, "The backup-dir is not a directory: %s\n", backup_dir_buf);
997 exit_cleanup(RERR_SYNTAX);
999 if (errno != ENOENT) {
1000 rprintf(FERROR, "Failed to stat %s: %s\n", backup_dir_buf, strerror(errno));
1001 exit_cleanup(RERR_FILEIO);
1003 if (INFO_GTE(BACKUP, 1))
1004 rprintf(FINFO, "(new) backup_dir is %s\n", backup_dir_buf);
1005 } else if (INFO_GTE(BACKUP, 1))
1006 rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
1007 if (backup_dir_len > 1)
1008 backup_dir_buf[backup_dir_len-1] = '/';
1013 int ret = do_stat(tmpdir, &st);
1014 if (ret < 0 || !S_ISDIR(st.st_mode)) {
1016 rprintf(FERROR, "The temp-dir is not a directory: %s\n", tmpdir);
1017 exit_cleanup(RERR_SYNTAX);
1019 if (errno == ENOENT) {
1020 rprintf(FERROR, "The temp-dir does not exist: %s\n", tmpdir);
1021 exit_cleanup(RERR_SYNTAX);
1023 rprintf(FERROR, "Failed to stat temp-dir %s: %s\n", tmpdir, strerror(errno));
1024 exit_cleanup(RERR_FILEIO);
1028 io_flush(FULL_FLUSH);
1030 if ((pid = do_fork()) == -1) {
1031 rsyserr(FERROR, errno, "fork failed in do_recv");
1032 exit_cleanup(RERR_IPC);
1037 send_msgs_to_gen = am_server;
1039 close(error_pipe[0]);
1041 /* We can't let two processes write to the socket at one time. */
1042 io_end_multiplex_out(MPLX_SWITCHING);
1046 f_out = error_pipe[1];
1048 bwlimit_writemax = 0; /* receiver doesn't need to do this */
1051 io_start_buffering_in(f_in);
1052 io_start_multiplex_out(f_out);
1054 recv_files(f_in, f_out, local_name);
1055 io_flush(FULL_FLUSH);
1058 if (output_needs_newline) {
1059 fputc('\n', stdout);
1060 output_needs_newline = 0;
1063 write_int(f_out, NDX_DONE);
1064 send_msg(MSG_STATS, (char*)&stats.total_read, sizeof stats.total_read, 0);
1065 io_flush(FULL_FLUSH);
1067 /* Handle any keep-alive packets from the post-processing work
1068 * that the generator does. */
1069 if (protocol_version >= 29) {
1070 kluge_around_eof = -1;
1072 /* This should only get stopped via a USR2 signal. */
1073 read_final_goodbye(f_in, f_out);
1075 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
1077 exit_cleanup(RERR_PROTOCOL);
1080 /* Finally, we go to sleep until our parent kills us with a
1081 * USR2 signal. We sleep for a short time, as on some OSes
1082 * a signal won't interrupt a sleep! */
1088 implied_filter_list.head = implied_filter_list.tail = NULL;
1089 flist_receiving_enabled = True;
1091 io_end_multiplex_in(MPLX_SWITCHING);
1092 if (write_batch && !am_server)
1095 close(error_pipe[1]);
1099 f_in = error_pipe[0];
1101 io_start_buffering_out(f_out);
1102 io_start_multiplex_in(f_in);
1104 #ifdef SUPPORT_HARD_LINKS
1105 if (preserve_hard_links && inc_recurse) {
1106 struct file_list *flist;
1107 for (flist = first_flist; flist; flist = flist->next)
1108 match_hard_links(flist);
1112 generate_files(f_out, local_name);
1115 io_flush(FULL_FLUSH);
1116 shutting_down = True;
1117 if (protocol_version >= 24) {
1118 /* send a final goodbye message */
1119 write_ndx(f_out, NDX_DONE);
1121 io_flush(FULL_FLUSH);
1124 wait_process_with_flush(pid, &exit_code);
1128 static void do_server_recv(int f_in, int f_out, int argc, char *argv[])
1131 struct file_list *flist;
1132 char *local_name = NULL;
1135 if (filesfrom_fd >= 0 && msgs2stderr != 1 && protocol_version < 31) {
1136 /* We can't mix messages with files-from data on the socket,
1137 * so temporarily turn off info/debug messages. */
1138 negate_output_levels();
1143 if (DEBUG_GTE(RECV, 1))
1144 rprintf(FINFO, "server_recv(%d) starting pid=%d\n", argc, (int)getpid());
1146 if (am_daemon && read_only) {
1147 rprintf(FERROR,"ERROR: module is read only\n");
1148 exit_cleanup(RERR_SYNTAX);
1152 become_copy_as_user();
1155 char *dir = argv[0];
1158 if (!am_daemon && !change_dir(dir, CD_NORMAL)) {
1159 rsyserr(FERROR, errno, "change_dir#4 %s failed",
1161 exit_cleanup(RERR_FILESELECT);
1165 if (protocol_version >= 30)
1166 io_start_multiplex_in(f_in);
1168 io_start_buffering_in(f_in);
1169 recv_filter_list(f_in);
1171 if (filesfrom_fd >= 0) {
1172 /* We need to send the files-from names to the sender at the
1173 * same time that we receive the file-list from them, so we
1174 * need the IO routines to automatically write out the names
1175 * onto our f_out socket as we read the file-list. This
1176 * avoids both deadlock and extra delays/buffers. */
1177 start_filesfrom_forwarding(filesfrom_fd);
1181 flist = recv_file_list(f_in, -1);
1183 rprintf(FERROR,"server_recv: recv_file_list error\n");
1184 exit_cleanup(RERR_FILESELECT);
1186 if (inc_recurse && file_total == 1)
1187 recv_additional_file_list(f_in);
1190 negate_output_levels();
1193 local_name = get_local_name(flist,argv[0]);
1195 /* Now that we know what our destination directory turned out to be,
1196 * we can sanitize the --link-/copy-/compare-dest args correctly. */
1197 if (sanitize_paths) {
1199 for (dir_p = basis_dir; *dir_p; dir_p++)
1200 *dir_p = sanitize_path(NULL, *dir_p, NULL, curr_dir_depth, SP_DEFAULT);
1202 partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, SP_DEFAULT);
1204 check_alt_basis_dirs();
1206 if (daemon_filter_list.head) {
1208 filter_rule_list *elp = &daemon_filter_list;
1210 for (dir_p = basis_dir; *dir_p; dir_p++) {
1213 dir += module_dirlen;
1214 if (check_filter(elp, FLOG, dir, 1) < 0)
1215 goto options_rejected;
1217 if (partial_dir && *partial_dir == '/'
1218 && check_filter(elp, FLOG, partial_dir + module_dirlen, 1) < 0) {
1220 rprintf(FERROR, "Your options have been rejected by the server.\n");
1221 exit_cleanup(RERR_SYNTAX);
1225 exit_code = do_recv(f_in, f_out, local_name);
1226 exit_cleanup(exit_code);
1230 int child_main(int argc, char *argv[])
1232 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1237 void start_server(int f_in, int f_out, int argc, char *argv[])
1239 set_nonblocking(f_in);
1240 set_nonblocking(f_out);
1242 io_set_sock_fds(f_in, f_out);
1243 setup_protocol(f_out, f_in);
1245 if (protocol_version >= 23)
1246 io_start_multiplex_out(f_out);
1247 if (am_daemon && io_timeout && protocol_version >= 31)
1248 send_msg_int(MSG_IO_TIMEOUT, io_timeout);
1251 keep_dirlinks = 0; /* Must be disabled on the sender. */
1252 if (need_messages_from_generator)
1253 io_start_multiplex_in(f_in);
1255 io_start_buffering_in(f_in);
1256 recv_filter_list(f_in);
1257 do_server_sender(f_in, f_out, argc, argv);
1259 do_server_recv(f_in, f_out, argc, argv);
1263 /* This is called once the connection has been negotiated. It is used
1264 * for rsyncd, remote-shell, and local connections. */
1265 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
1267 struct file_list *flist = NULL;
1268 int exit_code = 0, exit_code2 = 0;
1269 char *local_name = NULL;
1271 cleanup_child_pid = pid;
1273 set_nonblocking(f_in);
1274 set_nonblocking(f_out);
1277 io_set_sock_fds(f_in, f_out);
1278 setup_protocol(f_out,f_in);
1280 /* We set our stderr file handle to blocking because ssh might have
1281 * set it to non-blocking. This can be particularly troublesome if
1282 * stderr is a clone of stdout, because ssh would have set our stdout
1283 * to non-blocking at the same time (which can easily cause us to lose
1284 * output from our print statements). This kluge shouldn't cause ssh
1285 * any problems for how we use it. Note also that we delayed setting
1286 * this until after the above protocol setup so that we know for sure
1287 * that ssh is done twiddling its file descriptors. */
1288 set_blocking(STDERR_FILENO);
1291 keep_dirlinks = 0; /* Must be disabled on the sender. */
1294 && (log_format_has(stdout_format, 'C')
1295 || log_format_has(logfile_format, 'C')))
1296 sender_keeps_checksum = 1;
1298 if (protocol_version >= 30)
1299 io_start_multiplex_out(f_out);
1301 io_start_buffering_out(f_out);
1302 if (protocol_version >= 31 || (!filesfrom_host && protocol_version >= 23))
1303 io_start_multiplex_in(f_in);
1305 io_start_buffering_in(f_in);
1306 send_filter_list(f_out);
1308 filesfrom_fd = f_in;
1310 if (write_batch && !am_server)
1311 start_write_batch(f_out);
1313 become_copy_as_user();
1315 flist = send_file_list(f_out, argc, argv);
1316 if (DEBUG_GTE(FLIST, 3))
1317 rprintf(FINFO,"file list sent\n");
1319 if (protocol_version < 31 && filesfrom_host && protocol_version >= 23)
1320 io_start_multiplex_in(f_in);
1322 io_flush(NORMAL_FLUSH);
1323 send_files(f_in, f_out);
1324 io_flush(FULL_FLUSH);
1326 if (protocol_version >= 24)
1327 read_final_goodbye(f_in, f_out);
1329 if (DEBUG_GTE(EXIT, 2))
1330 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
1331 io_flush(FULL_FLUSH);
1332 wait_process_with_flush(pid, &exit_code);
1335 io_flush(FULL_FLUSH);
1336 exit_cleanup(exit_code);
1340 if (protocol_version >= 23)
1341 io_start_multiplex_in(f_in);
1342 if (need_messages_from_generator)
1343 io_start_multiplex_out(f_out);
1345 io_start_buffering_out(f_out);
1348 become_copy_as_user();
1350 send_filter_list(read_batch ? -1 : f_out);
1352 if (filesfrom_fd >= 0) {
1353 start_filesfrom_forwarding(filesfrom_fd);
1357 if (write_batch && !am_server)
1358 start_write_batch(f_in);
1359 flist = recv_file_list(f_in, -1);
1360 if (inc_recurse && file_total == 1)
1361 recv_additional_file_list(f_in);
1363 if (flist && flist->used > 0) {
1364 local_name = get_local_name(flist, argv[0]);
1366 check_alt_basis_dirs();
1368 exit_code2 = do_recv(f_in, f_out, local_name);
1375 if (DEBUG_GTE(RECV, 1))
1376 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
1377 io_flush(FULL_FLUSH);
1378 wait_process_with_flush(pid, &exit_code);
1381 return MAX(exit_code, exit_code2);
1384 static void dup_argv(char *argv[])
1388 for (i = 0; argv[i]; i++)
1389 argv[i] = strdup(argv[i]);
1393 /* Start a client for either type of remote connection. Work out
1394 * whether the arguments request a remote shell or rsyncd connection,
1395 * and call the appropriate connection function, then run_client.
1397 * Calls either start_socket_client (for sockets) or do_cmd and
1398 * client_run (for ssh). */
1399 static int start_client(int argc, char *argv[])
1401 char *p, *shell_machine = NULL, *shell_user = NULL;
1403 int remote_argc, env_port = rsync_port;
1408 /* Don't clobber argv[] so that ps(1) can still show the right
1412 if (!read_batch) { /* for read_batch, NO source is specified */
1413 char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1414 if (path) { /* source is remote */
1421 if (argc == 1 || **argv == ':')
1422 argc = 0; /* no dest arg */
1423 else if (check_for_hostspec(*argv, &dummy_host, &dummy_port)) {
1425 "The source and destination cannot both be remote.\n");
1426 exit_cleanup(RERR_SYNTAX);
1428 remote_argc--; /* don't count dest */
1431 if (filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) {
1433 "--files-from hostname is not the same as the transfer hostname\n");
1434 exit_cleanup(RERR_SYNTAX);
1438 daemon_connection = shell_cmd ? 1 : -1;
1439 } else { /* source is local, check dest arg */
1445 p = dot_dir_or_error();
1446 remote_argv = argv + argc;
1448 static char *dotarg[1] = { "." };
1450 remote_argv = dotarg;
1454 path = check_for_hostspec(p, &shell_machine, &rsync_port);
1455 if (path && filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) {
1457 "--files-from hostname is not the same as the transfer hostname\n");
1458 exit_cleanup(RERR_SYNTAX);
1460 if (!path) { /* no hostspec found, so src & dest are local */
1462 if (filesfrom_host) {
1464 "--files-from cannot be remote when the transfer is local\n");
1465 exit_cleanup(RERR_SYNTAX);
1467 shell_machine = NULL;
1469 } else { /* hostspec was found, so dest is remote */
1472 daemon_connection = shell_cmd ? 1 : -1;
1475 } else { /* read_batch */
1477 if (check_for_hostspec(argv[argc-1], &shell_machine, &rsync_port)) {
1478 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1479 exit_cleanup(RERR_SYNTAX);
1481 remote_argv = argv += argc - 1;
1482 remote_argc = argc = 1;
1486 /* A local transfer doesn't unbackslash anything, so leave the args alone. */
1490 if (!rsync_port && remote_argc && !**remote_argv) /* Turn an empty arg into a dot dir. */
1495 int dummy_port = rsync_port;
1499 /* For local source, extra source args must not have hostspec. */
1500 for (i = 1; i < argc; i++) {
1503 rprintf(FERROR, "Empty source arg specified.\n");
1504 exit_cleanup(RERR_SYNTAX);
1506 if (check_for_hostspec(argv[i], &dummy_host, &dummy_port)) {
1507 rprintf(FERROR, "Unexpected remote arg: %s\n", argv[i]);
1508 exit_cleanup(RERR_SYNTAX);
1513 int dummy_port = rsync_port;
1515 if (filesfrom_fd < 0)
1516 add_implied_include(remote_argv[0], daemon_connection);
1517 /* For remote source, any extra source args must have either
1518 * the same hostname or an empty hostname. */
1519 for (i = 1; i < remote_argc; i++) {
1520 char *arg = check_for_hostspec(remote_argv[i], &dummy_host, &dummy_port);
1522 rprintf(FERROR, "Unexpected local arg: %s\n", remote_argv[i]);
1523 rprintf(FERROR, "If arg is a remote file/dir, prefix it with a colon (:).\n");
1524 exit_cleanup(RERR_SYNTAX);
1526 if (*dummy_host && strcmp(dummy_host, shell_machine) != 0) {
1527 rprintf(FERROR, "All source args must come from the same machine.\n");
1528 exit_cleanup(RERR_SYNTAX);
1530 if (rsync_port != dummy_port) {
1531 if (!rsync_port || !dummy_port)
1532 rprintf(FERROR, "All source args must use the same hostspec format.\n");
1534 rprintf(FERROR, "All source args must use the same port number.\n");
1535 exit_cleanup(RERR_SYNTAX);
1537 if (!rsync_port && !*arg) /* Turn an empty arg into a dot dir. */
1539 remote_argv[i] = arg;
1540 add_implied_include(arg, daemon_connection);
1545 rsync_port = RSYNC_PORT;
1547 env_port = rsync_port;
1549 if (daemon_connection < 0)
1550 return start_socket_client(shell_machine, remote_argc, remote_argv, argc, argv);
1552 if (password_file && !daemon_connection) {
1553 rprintf(FERROR, "The --password-file option may only be "
1554 "used when accessing an rsync daemon.\n");
1555 exit_cleanup(RERR_SYNTAX);
1558 if (connect_timeout) {
1559 rprintf(FERROR, "The --contimeout option may only be "
1560 "used when connecting to an rsync daemon.\n");
1561 exit_cleanup(RERR_SYNTAX);
1564 if (shell_machine) {
1565 p = strrchr(shell_machine,'@');
1568 shell_user = shell_machine;
1569 shell_machine = p+1;
1573 if (DEBUG_GTE(CMD, 2)) {
1574 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1575 NS(shell_cmd), NS(shell_machine), NS(shell_user),
1576 NS(remote_argv[0]));
1580 if (daemon_connection)
1581 set_env_num("RSYNC_PORT", env_port);
1586 pid = do_cmd(shell_cmd, shell_machine, shell_user, remote_argv, remote_argc, &f_in, &f_out);
1588 /* if we're running an rsync server on the remote host over a
1589 * remote shell command, we need to do the RSYNCD protocol first */
1590 if (daemon_connection) {
1592 tmpret = start_inband_exchange(f_in, f_out, shell_user, remote_argc, remote_argv);
1597 ret = client_run(f_in, f_out, pid, argc, argv);
1606 static void sigusr1_handler(UNUSED(int val))
1608 called_from_signal_handler = 1;
1609 exit_cleanup(RERR_SIGNAL1);
1612 static void sigusr2_handler(UNUSED(int val))
1618 _exit(RERR_PARTIAL);
1622 #if defined SIGINFO || defined SIGVTALRM
1623 static void siginfo_handler(UNUSED(int val))
1625 if (!am_server && !INFO_GTE(PROGRESS, 1))
1626 want_progress_now = True;
1630 void remember_children(UNUSED(int val))
1635 /* An empty waitpid() loop was put here by Tridge and we could never
1636 * get him to explain why he put it in, so rather than taking it
1637 * out we're instead saving the child exit statuses for later use.
1638 * The waitpid() loop presumably eliminates all possibility of leaving
1639 * zombie children, maybe that's why he did it. */
1640 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1641 /* save the child's exit status */
1642 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1643 if (pid_stat_table[cnt].pid == 0) {
1644 pid_stat_table[cnt].pid = pid;
1645 pid_stat_table[cnt].status = status;
1651 #ifndef HAVE_SIGACTION
1652 signal(SIGCHLD, remember_children);
1657 * This routine catches signals and tries to send them to gdb.
1659 * Because it's called from inside a signal handler it ought not to
1660 * use too many library routines.
1662 * @todo Perhaps use "screen -X" instead/as well, to help people
1663 * debugging without easy access to X. Perhaps use an environment
1664 * variable, or just call a script?
1666 * @todo The /proc/ magic probably only works on Linux (and
1667 * Solaris?) Can we be more portable?
1669 #ifdef MAINTAINER_MODE
1670 const char *get_panic_action(void)
1672 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1676 return "xterm -display :0 -T Panic -n Panic -e gdb /proc/%d/exe %d";
1680 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1682 * This signal handler is only installed if we were configured with
1683 * --enable-maintainer-mode. Perhaps it should always be on and we
1684 * should just look at the environment variable, but I'm a bit leery
1685 * of a signal sending us into a busy loop.
1687 static void rsync_panic_handler(UNUSED(int whatsig))
1690 int ret, pid_int = getpid();
1692 snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(), pid_int, pid_int);
1694 /* Unless we failed to execute gdb, we allow the process to
1695 * continue. I'm not sure if that's right. */
1696 ret = shell_exec(cmd_buf);
1702 static void unset_env_var(const char *var)
1704 #ifdef HAVE_UNSETENV
1709 if (asprintf(&mem, "%s=", var) < 0)
1710 out_of_memory("unset_env_var");
1719 int main(int argc,char *argv[])
1726 #ifdef HAVE_SIGACTION
1727 # ifdef HAVE_SIGPROCMASK
1730 sigemptyset(&sigmask);
1732 sigact.sa_flags = SA_NOCLDSTOP;
1734 SIGACTMASK(SIGUSR1, sigusr1_handler);
1735 SIGACTMASK(SIGUSR2, sigusr2_handler);
1736 SIGACTMASK(SIGCHLD, remember_children);
1737 #ifdef MAINTAINER_MODE
1738 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1739 SIGACTMASK(SIGFPE, rsync_panic_handler);
1740 SIGACTMASK(SIGABRT, rsync_panic_handler);
1741 SIGACTMASK(SIGBUS, rsync_panic_handler);
1744 SIGACTMASK(SIGINFO, siginfo_handler);
1747 SIGACTMASK(SIGVTALRM, siginfo_handler);
1750 starttime = time(NULL);
1753 am_root = our_uid == ROOT_UID;
1755 unset_env_var("DISPLAY");
1757 #if defined USE_OPENSSL && defined SET_OPENSSL_CONF
1758 #define TO_STR2(x) #x
1759 #define TO_STR(x) TO_STR2(x)
1760 /* ./configure --with-openssl-conf=/etc/ssl/openssl-rsync.cnf
1761 * defines SET_OPENSSL_CONF as that unquoted pathname. */
1762 if (!getenv("OPENSSL_CONF")) /* Don't override it if it's already set. */
1763 set_env_str("OPENSSL_CONF", TO_STR(SET_OPENSSL_CONF));
1768 memset(&stats, 0, sizeof(stats));
1770 /* Even a non-daemon runs needs the default config values to be set, e.g.
1771 * lp_dont_compress() is queried when no --skip-compress option is set. */
1772 reset_daemon_vars();
1776 exit_cleanup(RERR_SYNTAX);
1779 /* Get the umask for use in permission calculations. We no longer set
1780 * it to zero; that is ugly and pointless now that all the callers that
1781 * relied on it have been reeducated to work with default ACLs. */
1782 umask(orig_umask = umask(0));
1784 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1785 setlocale(LC_CTYPE, "");
1786 setlocale(LC_NUMERIC, "");
1789 if (!parse_arguments(&argc, (const char ***) &argv)) {
1791 exit_cleanup(RERR_SYNTAX);
1794 && poptDupArgv(argc, (const char **)argv, &cooked_argc, (const char ***)&cooked_argv) != 0)
1795 out_of_memory("main");
1797 SIGACTMASK(SIGINT, sig_int);
1798 SIGACTMASK(SIGHUP, sig_int);
1799 SIGACTMASK(SIGTERM, sig_int);
1800 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1801 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1804 /* Ignore SIGPIPE; we consistently check error codes and will
1806 SIGACTION(SIGPIPE, SIG_IGN);
1808 SIGACTION(SIGXFSZ, SIG_IGN);
1811 /* Initialize change_dir() here because on some old systems getcwd
1812 * (implemented by forking "pwd" and reading its output) doesn't
1813 * work when there are other child processes. Also, on all systems
1814 * that implement getcwd that way "pwd" can't be found after chroot. */
1815 change_dir(NULL, CD_NORMAL);
1817 if ((write_batch || read_batch) && !am_server) {
1818 open_batch_files(); /* sets batch_fd */
1820 read_stream_flags(batch_fd);
1822 write_stream_flags(batch_fd);
1824 if (write_batch < 0)
1831 } else if (am_daemon)
1832 return daemon_main();
1834 if (am_server && protect_args) {
1835 char buf[MAXPATHLEN];
1837 read_args(STDIN_FILENO, NULL, buf, sizeof buf, 1, &argv, &argc, NULL);
1838 if (!parse_arguments(&argc, (const char ***) &argv)) {
1840 exit_cleanup(RERR_SYNTAX);
1846 exit_cleanup(RERR_SYNTAX);
1850 set_nonblocking(STDIN_FILENO);
1851 set_nonblocking(STDOUT_FILENO);
1853 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1854 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1857 ret = start_client(argc, argv);
1859 exit_cleanup(RERR_STARTCLIENT);