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 int trust_sender_filter;
93 extern struct stats stats;
94 extern char *stdout_format;
95 extern char *logfile_format;
96 extern char *filesfrom_host;
97 extern char *partial_dir;
98 extern char *rsync_path;
99 extern char *shell_cmd;
100 extern char *password_file;
101 extern char *backup_dir;
102 extern char *copy_as;
104 extern char curr_dir[MAXPATHLEN];
105 extern char backup_dir_buf[MAXPATHLEN];
106 extern char *basis_dir[MAX_BASIS_DIRS+1];
107 extern struct file_list *first_flist;
108 extern filter_rule_list daemon_filter_list, implied_filter_list;
112 int am_receiver = 0; /* Only set to 1 after the receiver/generator fork. */
113 int am_generator = 0; /* Only set to 1 after the receiver/generator fork. */
114 int local_server = 0;
115 int daemon_connection = 0; /* 0 = no daemon, 1 = daemon via remote shell, -1 = daemon via socket */
116 mode_t orig_umask = 0;
117 int batch_gen_fd = -1;
118 int sender_keeps_checksum = 0;
119 int raw_argc, cooked_argc;
120 char **raw_argv, **cooked_argv;
122 /* There's probably never more than at most 2 outstanding child processes,
123 * but set it higher, just in case. */
124 #define MAXCHILDPROCS 7
126 #ifdef HAVE_SIGACTION
127 # ifdef HAVE_SIGPROCMASK
128 # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
130 # define SIGACTMASK(n,h) SIGACTION(n,h)
132 static struct sigaction sigact;
138 } pid_stat_table[MAXCHILDPROCS];
140 static time_t starttime, endtime;
141 static int64 total_read, total_written;
143 static void show_malloc_stats(void);
145 /* Works like waitpid(), but if we already harvested the child pid in our
146 * remember_children(), we succeed instead of returning an error. */
147 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
152 waited_pid = waitpid(pid, status_ptr, flags);
153 } while (waited_pid == -1 && errno == EINTR);
155 if (waited_pid == -1 && errno == ECHILD) {
156 /* Status of requested child no longer available: check to
157 * see if it was processed by remember_children(). */
159 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
160 if (pid == pid_stat_table[cnt].pid) {
161 *status_ptr = pid_stat_table[cnt].status;
162 pid_stat_table[cnt].pid = 0;
171 int shell_exec(const char *cmd)
173 char *shell = getenv("RSYNC_SHELL");
180 if ((pid = fork()) < 0)
184 execlp(shell, shell, "-c", cmd, NULL);
188 int ret = wait_process(pid, &status, 0);
189 return ret < 0 ? -1 : status;
192 /* Wait for a process to exit, calling io_flush while waiting. */
193 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
198 while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
200 io_flush(FULL_FLUSH);
203 /* TODO: If the child exited on a signal, then log an
204 * appropriate error message. Perhaps we should also accept a
205 * message describing the purpose of the child. Also indicate
206 * this to the caller so that they know something went wrong. */
207 if (waited_pid < 0) {
208 rsyserr(FERROR, errno, "waitpid");
209 *exit_code_ptr = RERR_WAITCHILD;
210 } else if (!WIFEXITED(status)) {
212 if (WCOREDUMP(status))
213 *exit_code_ptr = RERR_CRASHED;
216 if (WIFSIGNALED(status))
217 *exit_code_ptr = RERR_TERMINATED;
219 *exit_code_ptr = RERR_WAITCHILD;
221 *exit_code_ptr = WEXITSTATUS(status);
224 void write_del_stats(int f)
227 write_int(f, NDX_DEL_STATS);
229 write_ndx(f, NDX_DEL_STATS);
230 write_varint(f, stats.deleted_files - stats.deleted_dirs
231 - stats.deleted_symlinks - stats.deleted_devices
232 - stats.deleted_specials);
233 write_varint(f, stats.deleted_dirs);
234 write_varint(f, stats.deleted_symlinks);
235 write_varint(f, stats.deleted_devices);
236 write_varint(f, stats.deleted_specials);
239 void read_del_stats(int f)
241 stats.deleted_files = read_varint(f);
242 stats.deleted_files += stats.deleted_dirs = read_varint(f);
243 stats.deleted_files += stats.deleted_symlinks = read_varint(f);
244 stats.deleted_files += stats.deleted_devices = read_varint(f);
245 stats.deleted_files += stats.deleted_specials = read_varint(f);
248 static void become_copy_as_user()
257 if (DEBUG_GTE(CMD, 2))
258 rprintf(FINFO, "[%s] copy_as=%s\n", who_am_i(), copy_as);
260 if ((gname = strchr(copy_as, ':')) != NULL)
263 if (!user_to_uid(copy_as, &uid, True)) {
264 rprintf(FERROR, "Invalid copy-as user: %s\n", copy_as);
265 exit_cleanup(RERR_SYNTAX);
269 if (!group_to_gid(gname, &gid, True)) {
270 rprintf(FERROR, "Invalid copy-as group: %s\n", gname);
271 exit_cleanup(RERR_SYNTAX);
275 if ((pw = getpwuid(uid)) == NULL) {
276 rsyserr(FERROR, errno, "getpwuid failed");
277 exit_cleanup(RERR_SYNTAX);
282 if (setgid(gid) < 0) {
283 rsyserr(FERROR, errno, "setgid failed");
284 exit_cleanup(RERR_SYNTAX);
286 #ifdef HAVE_SETGROUPS
287 if (setgroups(1, &gid)) {
288 rsyserr(FERROR, errno, "setgroups failed");
289 exit_cleanup(RERR_SYNTAX);
292 #ifdef HAVE_INITGROUPS
293 if (!gname && initgroups(copy_as, gid) < 0) {
294 rsyserr(FERROR, errno, "initgroups failed");
295 exit_cleanup(RERR_SYNTAX);
304 rsyserr(FERROR, errno, "setuid failed");
305 exit_cleanup(RERR_SYNTAX);
310 am_root = (our_uid == ROOT_UID);
316 /* This function gets called from all 3 processes. We want the client side
317 * to actually output the text, but the sender is the only process that has
318 * all the stats we need. So, if we're a client sender, we do the report.
319 * If we're a server sender, we write the stats on the supplied fd. If
320 * we're the client receiver we read the stats from the supplied fd and do
321 * the report. All processes might also generate a set of debug stats, if
322 * the verbose level is high enough (this is the only thing that the
323 * generator process and the server receiver ever do here). */
324 static void handle_stats(int f)
326 endtime = time(NULL);
328 /* Cache two stats because the read/write code can change it. */
329 total_read = stats.total_read;
330 total_written = stats.total_written;
332 if (INFO_GTE(STATS, 3)) {
333 /* These come out from every process */
342 if (f == -1 || !am_sender)
348 write_varlong30(f, total_read, 3);
349 write_varlong30(f, total_written, 3);
350 write_varlong30(f, stats.total_size, 3);
351 if (protocol_version >= 29) {
352 write_varlong30(f, stats.flist_buildtime, 3);
353 write_varlong30(f, stats.flist_xfertime, 3);
359 /* this is the client */
361 if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
363 else if (!am_sender) {
364 /* Read the first two in opposite order because the meaning of
365 * read/write swaps when switching from sender to receiver. */
366 total_written = read_varlong30(f, 3);
367 total_read = read_varlong30(f, 3);
368 stats.total_size = read_varlong30(f, 3);
369 if (protocol_version >= 29) {
370 stats.flist_buildtime = read_varlong30(f, 3);
371 stats.flist_xfertime = read_varlong30(f, 3);
373 } else if (write_batch) {
374 /* The --read-batch process is going to be a client
375 * receiver, so we need to give it the stats. */
376 write_varlong30(batch_fd, total_read, 3);
377 write_varlong30(batch_fd, total_written, 3);
378 write_varlong30(batch_fd, stats.total_size, 3);
379 if (protocol_version >= 29) {
380 write_varlong30(batch_fd, stats.flist_buildtime, 3);
381 write_varlong30(batch_fd, stats.flist_xfertime, 3);
386 static void output_itemized_counts(const char *prefix, int *counts)
388 static char *labels[] = { "reg", "dir", "link", "dev", "special" };
389 char buf[1024], *pre = " (";
391 int total = counts[0];
393 counts[0] -= counts[1] + counts[2] + counts[3] + counts[4];
394 for (j = 0; j < 5; j++) {
396 len += snprintf(buf+len, sizeof buf - len - 2,
398 pre, labels[j], comma_num(counts[j]));
405 rprintf(FINFO, "%s: %s%s\n", prefix, comma_num(total), buf);
408 static const char *bytes_per_sec_human_dnum(void)
410 if (starttime == (time_t)-1 || endtime == (time_t)-1)
412 return human_dnum((total_written + total_read) / (0.5 + (endtime - starttime)), 2);
415 static void output_summary(void)
417 if (INFO_GTE(STATS, 2)) {
418 rprintf(FCLIENT, "\n");
419 output_itemized_counts("Number of files", &stats.num_files);
420 if (protocol_version >= 29)
421 output_itemized_counts("Number of created files", &stats.created_files);
422 if (protocol_version >= 31)
423 output_itemized_counts("Number of deleted files", &stats.deleted_files);
424 rprintf(FINFO,"Number of regular files transferred: %s\n",
425 comma_num(stats.xferred_files));
426 rprintf(FINFO,"Total file size: %s bytes\n",
427 human_num(stats.total_size));
428 rprintf(FINFO,"Total transferred file size: %s bytes\n",
429 human_num(stats.total_transferred_size));
430 rprintf(FINFO,"Literal data: %s bytes\n",
431 human_num(stats.literal_data));
432 rprintf(FINFO,"Matched data: %s bytes\n",
433 human_num(stats.matched_data));
434 rprintf(FINFO,"File list size: %s\n",
435 human_num(stats.flist_size));
436 if (stats.flist_buildtime) {
438 "File list generation time: %s seconds\n",
439 comma_dnum((double)stats.flist_buildtime / 1000, 3));
441 "File list transfer time: %s seconds\n",
442 comma_dnum((double)stats.flist_xfertime / 1000, 3));
444 rprintf(FINFO,"Total bytes sent: %s\n",
445 human_num(total_written));
446 rprintf(FINFO,"Total bytes received: %s\n",
447 human_num(total_read));
450 if (INFO_GTE(STATS, 1)) {
451 rprintf(FCLIENT, "\n");
453 "sent %s bytes received %s bytes %s bytes/sec\n",
454 human_num(total_written), human_num(total_read),
455 bytes_per_sec_human_dnum());
456 rprintf(FINFO, "total size is %s speedup is %s%s\n",
457 human_num(stats.total_size),
458 comma_dnum((double)stats.total_size / (total_written+total_read), 2),
459 write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : "");
468 * If our C library can get malloc statistics, then show them to FINFO
470 static void show_malloc_stats(void)
472 #ifdef MEM_ALLOC_INFO
473 struct MEM_ALLOC_INFO mi = MEM_ALLOC_INFO(); /* mallinfo or mallinfo2 */
475 rprintf(FCLIENT, "\n");
476 rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
477 (int)getpid(), am_server ? "server " : "",
478 am_daemon ? "daemon " : "", who_am_i());
480 #define PRINT_ALLOC_NUM(title, descr, num) \
481 rprintf(FINFO, " %-11s%10" SIZE_T_FMT_MOD "d (" descr ")\n", \
482 title ":", (SIZE_T_FMT_CAST)(num));
484 PRINT_ALLOC_NUM("arena", "bytes from sbrk", mi.arena);
485 PRINT_ALLOC_NUM("ordblks", "chunks not in use", mi.ordblks);
486 PRINT_ALLOC_NUM("smblks", "free fastbin blocks", mi.smblks);
487 PRINT_ALLOC_NUM("hblks", "chunks from mmap", mi.hblks);
488 PRINT_ALLOC_NUM("hblkhd", "bytes from mmap", mi.hblkhd);
489 PRINT_ALLOC_NUM("allmem", "bytes from sbrk + mmap", mi.arena + mi.hblkhd);
490 PRINT_ALLOC_NUM("usmblks", "always 0", mi.usmblks);
491 PRINT_ALLOC_NUM("fsmblks", "bytes in freed fastbin blocks", mi.fsmblks);
492 PRINT_ALLOC_NUM("uordblks", "bytes used", mi.uordblks);
493 PRINT_ALLOC_NUM("fordblks", "bytes free", mi.fordblks);
494 PRINT_ALLOC_NUM("keepcost", "bytes in releasable chunk", mi.keepcost);
496 #undef PRINT_ALLOC_NUM
498 #endif /* MEM_ALLOC_INFO */
502 /* Start the remote shell. cmd may be NULL to use the default. */
503 static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc,
504 int *f_in_p, int *f_out_p)
507 char *args[MAX_ARGS], *need_to_free = NULL;
511 if (!read_batch && !local_server) {
512 char *t, *f, in_quote = '\0';
513 char *rsh_env = getenv(RSYNC_RSH_ENV);
518 cmd = need_to_free = strdup(cmd);
520 for (t = f = cmd; *f; f++) {
523 /* Comparison leaves rooms for server_options(). */
524 if (argc >= MAX_ARGS - MAX_SERVER_ARGS)
527 while (*f != ' ' || in_quote) {
531 "Missing trailing-%c in remote-shell command.\n",
533 exit_cleanup(RERR_SYNTAX);
538 if (*f == '\'' || *f == '"') {
543 if (*f == in_quote && *++f != in_quote) {
553 /* NOTE: must preserve t == start of command name until the end of the args handling! */
554 if ((t = strrchr(cmd, '/')) != NULL)
559 /* Check to see if we've already been given '-l user' in the remote-shell command. */
560 for (i = 0; i < argc-1; i++) {
561 if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
566 /* remsh (on HPUX) takes the arguments the other way around */
567 args[argc++] = machine;
568 if (user && !(daemon_connection && dash_l_set)) {
573 if (user && !(daemon_connection && dash_l_set)) {
578 if (default_af_hint == AF_INET && strcmp(t, "ssh") == 0)
579 args[argc++] = "-4"; /* we're using ssh so we can add a -4 option */
582 if (default_af_hint == AF_INET6 && strcmp(t, "ssh") == 0)
583 args[argc++] = "-6"; /* we're using ssh so we can add a -6 option */
585 args[argc++] = machine;
588 args[argc++] = rsync_path;
590 if (blocking_io < 0 && (strcmp(t, "rsh") == 0 || strcmp(t, "remsh") == 0))
593 if (daemon_connection > 0) {
594 args[argc++] = "--server";
595 args[argc++] = "--daemon";
597 server_options(args, &argc);
599 if (argc >= MAX_ARGS - 2)
605 if (!daemon_connection) {
606 while (remote_argc > 0) {
607 if (argc >= MAX_ARGS - 1) {
609 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
610 exit_cleanup(RERR_SYNTAX);
612 args[argc++] = safe_arg(NULL, *remote_argv++);
619 if (DEBUG_GTE(CMD, 2)) {
620 for (i = 0; i < argc; i++)
621 rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]);
622 rprintf(FCLIENT, "\n");
626 int from_gen_pipe[2];
627 set_allow_inc_recurse();
628 if (fd_pair(from_gen_pipe) < 0) {
629 rsyserr(FERROR, errno, "pipe");
630 exit_cleanup(RERR_IPC);
632 batch_gen_fd = from_gen_pipe[0];
633 *f_out_p = from_gen_pipe[1];
635 pid = (pid_t)-1; /* no child pid */
639 trust_sender_filter = 1;
640 } else if (local_server) {
641 /* If the user didn't request --[no-]whole-file, force
642 * it on, but only if we're not batch processing. */
643 if (whole_file < 0 && !write_batch)
645 set_allow_inc_recurse();
646 pid = local_child(argc, args, f_in_p, f_out_p, child_main);
651 pid = piped_child(args, f_in_p, f_out_p);
655 if (protect_args && !daemon_connection)
656 send_protected_args(*f_out_p, args);
665 /* The receiving side operates in one of two modes:
667 * 1. it receives any number of files into a destination directory,
668 * placing them according to their names in the file-list.
670 * 2. it receives a single file and saves it using the name in the
671 * destination path instead of its file-list name. This requires a
672 * "local name" for writing out the destination file.
674 * So, our task is to figure out what mode/local-name we need.
675 * For mode 1, we change into the destination directory and return NULL.
676 * For mode 2, we change into the directory containing the destination
677 * file (if we aren't already there) and return the local-name. */
678 static char *get_local_name(struct file_list *flist, char *dest_path)
681 int statret, trailing_slash;
684 if (DEBUG_GTE(RECV, 1)) {
685 rprintf(FINFO, "get_local_name count=%d %s\n",
686 file_total, NS(dest_path));
689 if (!dest_path || list_only)
692 /* Treat an empty string as a copy into the current directory. */
696 if (daemon_filter_list.head) {
697 char *slash = strrchr(dest_path, '/');
698 if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0')))
702 if ((*dest_path != '.' || dest_path[1] != '\0')
703 && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0
704 || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) {
705 rprintf(FERROR, "ERROR: daemon has excluded destination \"%s\"\n",
707 exit_cleanup(RERR_FILESELECT);
713 /* See what currently exists at the destination. */
714 statret = do_stat(dest_path, &st);
715 cp = strrchr(dest_path, '/');
716 trailing_slash = cp && !cp[1];
718 if (mkpath_dest_arg && statret < 0 && (cp || file_total > 1)) {
719 int save_errno = errno;
720 int ret = make_path(dest_path, file_total > 1 && !trailing_slash ? 0 : MKP_DROP_NAME);
723 if (ret && (INFO_GTE(NAME, 1) || stdout_format_has_i)) {
724 if (file_total == 1 || trailing_slash)
726 rprintf(FINFO, "created %d director%s for %s\n", ret, ret == 1 ? "y" : "ies", dest_path);
727 if (file_total == 1 || trailing_slash)
731 statret = do_stat(dest_path, &st);
737 /* If the destination is a dir, enter it and use mode 1. */
738 if (S_ISDIR(st.st_mode)) {
739 if (!change_dir(dest_path, CD_NORMAL)) {
740 rsyserr(FERROR, errno, "change_dir#1 %s failed",
741 full_fname(dest_path));
742 exit_cleanup(RERR_FILESELECT);
744 filesystem_dev = st.st_dev; /* ensures --force works right w/-x */
747 if (file_total > 1) {
749 "ERROR: destination must be a directory when"
750 " copying more than 1 file\n");
751 exit_cleanup(RERR_FILESELECT);
753 if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) {
755 "ERROR: cannot overwrite non-directory"
756 " with a directory\n");
757 exit_cleanup(RERR_FILESELECT);
759 } else if (errno != ENOENT) {
760 /* If we don't know what's at the destination, fail. */
761 rsyserr(FERROR, errno, "ERROR: cannot stat destination %s",
762 full_fname(dest_path));
763 exit_cleanup(RERR_FILESELECT);
766 /* If we need a destination directory because the transfer is not
767 * of a single non-directory or the user has requested one via a
768 * destination path ending in a slash, create one and use mode 1. */
769 if (file_total > 1 || trailing_slash) {
771 *cp = '\0'; /* Lop off the final slash (if any). */
774 rprintf(FERROR, "ERROR: destination path is not a directory\n");
775 exit_cleanup(RERR_SYNTAX);
778 if (do_mkdir(dest_path, ACCESSPERMS) != 0) {
780 rsyserr(FERROR, errno, "mkdir %s failed",
781 full_fname(dest_path));
782 exit_cleanup(RERR_FILEIO);
785 if (flist->high >= flist->low
786 && strcmp(flist->files[flist->low]->basename, ".") == 0)
787 flist->files[0]->flags |= FLAG_DIR_CREATED;
789 if (INFO_GTE(NAME, 1) || stdout_format_has_i)
790 rprintf(FINFO, "created directory %s\n", dest_path);
793 /* Indicate that dest dir doesn't really exist. */
797 if (!change_dir(dest_path, dry_run > 1 ? CD_SKIP_CHDIR : CD_NORMAL)) {
798 rsyserr(FERROR, errno, "change_dir#2 %s failed",
799 full_fname(dest_path));
800 exit_cleanup(RERR_FILESELECT);
806 /* Otherwise, we are writing a single file, possibly on top of an
807 * existing non-directory. Change to the item's parent directory
808 * (if it has a path component), return the basename of the
809 * destination file as the local name, and use mode 2. */
817 if (!change_dir(dest_path, CD_NORMAL)) {
818 rsyserr(FERROR, errno, "change_dir#3 %s failed",
819 full_fname(dest_path));
820 exit_cleanup(RERR_FILESELECT);
827 /* This function checks on our alternate-basis directories. If we're in
828 * dry-run mode and the destination dir does not yet exist, we'll try to
829 * tweak any dest-relative paths to make them work for a dry-run (the
830 * destination dir must be in curr_dir[] when this function is called).
831 * We also warn about any arg that is non-existent or not a directory. */
832 static void check_alt_basis_dirs(void)
835 char *slash = strrchr(curr_dir, '/');
838 for (j = 0; j < basis_dir_cnt; j++) {
839 char *bdir = basis_dir[j];
840 int bd_len = strlen(bdir);
841 if (bd_len > 1 && bdir[bd_len-1] == '/')
842 bdir[--bd_len] = '\0';
843 if (dry_run > 1 && *bdir != '/') {
844 int len = curr_dir_len + 1 + bd_len + 1;
845 char *new = new_array(char, len);
846 if (slash && strncmp(bdir, "../", 3) == 0) {
847 /* We want to remove only one leading "../" prefix for
848 * the directory we couldn't create in dry-run mode:
849 * this ensures that any other ".." references get
850 * evaluated the same as they would for a live copy. */
852 pathjoin(new, len, curr_dir, bdir + 3);
855 pathjoin(new, len, curr_dir, bdir);
856 basis_dir[j] = bdir = new;
858 if (do_stat(bdir, &st) < 0)
859 rprintf(FWARNING, "%s arg does not exist: %s\n", alt_dest_opt(0), bdir);
860 else if (!S_ISDIR(st.st_mode))
861 rprintf(FWARNING, "%s arg is not a dir: %s\n", alt_dest_opt(0), bdir);
865 /* This is only called by the sender. */
866 static void read_final_goodbye(int f_in, int f_out)
870 char xname[MAXPATHLEN];
872 shutting_down = True;
874 if (protocol_version < 29)
877 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
878 if (protocol_version >= 31 && i == NDX_DONE) {
880 write_ndx(f_out, NDX_DONE);
882 if (batch_gen_fd >= 0) {
883 while (read_int(batch_gen_fd) != NDX_DEL_STATS) {}
884 read_del_stats(batch_gen_fd);
886 write_int(f_out, NDX_DONE);
888 i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
893 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
895 exit_cleanup(RERR_PROTOCOL);
899 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
901 struct file_list *flist;
904 if (DEBUG_GTE(SEND, 1))
905 rprintf(FINFO, "server_sender starting pid=%d\n", (int)getpid());
907 if (am_daemon && lp_write_only(module_id)) {
908 rprintf(FERROR, "ERROR: module is write only\n");
909 exit_cleanup(RERR_SYNTAX);
911 if (am_daemon && read_only && remove_source_files) {
913 "ERROR: --remove-%s-files cannot be used with a read-only module\n",
914 remove_source_files == 1 ? "source" : "sent");
915 exit_cleanup(RERR_SYNTAX);
918 rprintf(FERROR, "ERROR: do_server_sender called without args\n");
919 exit_cleanup(RERR_SYNTAX);
922 become_copy_as_user();
925 if (!relative_paths) {
926 if (!change_dir(dir, CD_NORMAL)) {
927 rsyserr(FERROR, errno, "change_dir#3 %s failed",
929 exit_cleanup(RERR_FILESELECT);
935 if (argc == 0 && (recurse || xfer_dirs || list_only)) {
941 flist = send_file_list(f_out,argc,argv);
942 if (!flist || flist->used == 0) {
943 /* Make sure input buffering is off so we can't hang in noop_io_until_death(). */
944 io_end_buffering_in(0);
945 /* TODO: we should really exit in a more controlled manner. */
949 io_start_buffering_in(f_in);
951 send_files(f_in, f_out);
952 io_flush(FULL_FLUSH);
954 if (protocol_version >= 24)
955 read_final_goodbye(f_in, f_out);
956 io_flush(FULL_FLUSH);
961 static int do_recv(int f_in, int f_out, char *local_name)
967 /* The receiving side mustn't obey this, or an existing symlink that
968 * points to an identical file won't be replaced by the referent. */
969 copy_links = copy_dirlinks = copy_unsafe_links = 0;
971 #ifdef SUPPORT_HARD_LINKS
972 if (preserve_hard_links && !inc_recurse)
973 match_hard_links(first_flist);
976 if (fd_pair(error_pipe) < 0) {
977 rsyserr(FERROR, errno, "pipe failed in do_recv");
978 exit_cleanup(RERR_IPC);
984 if (backup_dir_len > 1)
985 backup_dir_buf[backup_dir_len-1] = '\0';
986 ret = do_stat(backup_dir_buf, &st);
987 if (ret != 0 || !S_ISDIR(st.st_mode)) {
989 rprintf(FERROR, "The backup-dir is not a directory: %s\n", backup_dir_buf);
990 exit_cleanup(RERR_SYNTAX);
992 if (errno != ENOENT) {
993 rprintf(FERROR, "Failed to stat %s: %s\n", backup_dir_buf, strerror(errno));
994 exit_cleanup(RERR_FILEIO);
996 if (INFO_GTE(BACKUP, 1))
997 rprintf(FINFO, "(new) backup_dir is %s\n", backup_dir_buf);
998 } else if (INFO_GTE(BACKUP, 1))
999 rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
1000 if (backup_dir_len > 1)
1001 backup_dir_buf[backup_dir_len-1] = '/';
1006 int ret = do_stat(tmpdir, &st);
1007 if (ret < 0 || !S_ISDIR(st.st_mode)) {
1009 rprintf(FERROR, "The temp-dir is not a directory: %s\n", tmpdir);
1010 exit_cleanup(RERR_SYNTAX);
1012 if (errno == ENOENT) {
1013 rprintf(FERROR, "The temp-dir does not exist: %s\n", tmpdir);
1014 exit_cleanup(RERR_SYNTAX);
1016 rprintf(FERROR, "Failed to stat temp-dir %s: %s\n", tmpdir, strerror(errno));
1017 exit_cleanup(RERR_FILEIO);
1021 io_flush(FULL_FLUSH);
1023 if ((pid = do_fork()) == -1) {
1024 rsyserr(FERROR, errno, "fork failed in do_recv");
1025 exit_cleanup(RERR_IPC);
1030 send_msgs_to_gen = am_server;
1032 close(error_pipe[0]);
1034 /* We can't let two processes write to the socket at one time. */
1035 io_end_multiplex_out(MPLX_SWITCHING);
1039 f_out = error_pipe[1];
1041 bwlimit_writemax = 0; /* receiver doesn't need to do this */
1044 io_start_buffering_in(f_in);
1045 io_start_multiplex_out(f_out);
1047 recv_files(f_in, f_out, local_name);
1048 io_flush(FULL_FLUSH);
1051 if (output_needs_newline) {
1052 fputc('\n', stdout);
1053 output_needs_newline = 0;
1056 write_int(f_out, NDX_DONE);
1057 send_msg(MSG_STATS, (char*)&stats.total_read, sizeof stats.total_read, 0);
1058 io_flush(FULL_FLUSH);
1060 /* Handle any keep-alive packets from the post-processing work
1061 * that the generator does. */
1062 if (protocol_version >= 29) {
1063 kluge_around_eof = -1;
1065 /* This should only get stopped via a USR2 signal. */
1066 read_final_goodbye(f_in, f_out);
1068 rprintf(FERROR, "Invalid packet at end of run [%s]\n",
1070 exit_cleanup(RERR_PROTOCOL);
1073 /* Finally, we go to sleep until our parent kills us with a
1074 * USR2 signal. We sleep for a short time, as on some OSes
1075 * a signal won't interrupt a sleep! */
1081 flist_receiving_enabled = True;
1083 io_end_multiplex_in(MPLX_SWITCHING);
1084 if (write_batch && !am_server)
1087 close(error_pipe[1]);
1091 f_in = error_pipe[0];
1093 io_start_buffering_out(f_out);
1094 io_start_multiplex_in(f_in);
1096 #ifdef SUPPORT_HARD_LINKS
1097 if (preserve_hard_links && inc_recurse) {
1098 struct file_list *flist;
1099 for (flist = first_flist; flist; flist = flist->next)
1100 match_hard_links(flist);
1104 generate_files(f_out, local_name);
1107 io_flush(FULL_FLUSH);
1108 shutting_down = True;
1109 if (protocol_version >= 24) {
1110 /* send a final goodbye message */
1111 write_ndx(f_out, NDX_DONE);
1113 io_flush(FULL_FLUSH);
1116 wait_process_with_flush(pid, &exit_code);
1120 static void do_server_recv(int f_in, int f_out, int argc, char *argv[])
1123 struct file_list *flist;
1124 char *local_name = NULL;
1127 if (filesfrom_fd >= 0 && msgs2stderr != 1 && protocol_version < 31) {
1128 /* We can't mix messages with files-from data on the socket,
1129 * so temporarily turn off info/debug messages. */
1130 negate_output_levels();
1135 if (DEBUG_GTE(RECV, 1))
1136 rprintf(FINFO, "server_recv(%d) starting pid=%d\n", argc, (int)getpid());
1138 if (am_daemon && read_only) {
1139 rprintf(FERROR,"ERROR: module is read only\n");
1140 exit_cleanup(RERR_SYNTAX);
1144 become_copy_as_user();
1147 char *dir = argv[0];
1150 if (!am_daemon && !change_dir(dir, CD_NORMAL)) {
1151 rsyserr(FERROR, errno, "change_dir#4 %s failed",
1153 exit_cleanup(RERR_FILESELECT);
1157 if (protocol_version >= 30)
1158 io_start_multiplex_in(f_in);
1160 io_start_buffering_in(f_in);
1161 recv_filter_list(f_in);
1163 if (filesfrom_fd >= 0) {
1164 /* We need to send the files-from names to the sender at the
1165 * same time that we receive the file-list from them, so we
1166 * need the IO routines to automatically write out the names
1167 * onto our f_out socket as we read the file-list. This
1168 * avoids both deadlock and extra delays/buffers. */
1169 start_filesfrom_forwarding(filesfrom_fd);
1173 flist = recv_file_list(f_in, -1);
1175 rprintf(FERROR,"server_recv: recv_file_list error\n");
1176 exit_cleanup(RERR_FILESELECT);
1178 if (inc_recurse && file_total == 1)
1179 recv_additional_file_list(f_in);
1182 negate_output_levels();
1185 local_name = get_local_name(flist,argv[0]);
1187 /* Now that we know what our destination directory turned out to be,
1188 * we can sanitize the --link-/copy-/compare-dest args correctly. */
1189 if (sanitize_paths) {
1191 for (dir_p = basis_dir; *dir_p; dir_p++)
1192 *dir_p = sanitize_path(NULL, *dir_p, NULL, curr_dir_depth, SP_DEFAULT);
1194 partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, SP_DEFAULT);
1196 check_alt_basis_dirs();
1198 if (daemon_filter_list.head) {
1200 filter_rule_list *elp = &daemon_filter_list;
1202 for (dir_p = basis_dir; *dir_p; dir_p++) {
1205 dir += module_dirlen;
1206 if (check_filter(elp, FLOG, dir, 1) < 0)
1207 goto options_rejected;
1209 if (partial_dir && *partial_dir == '/'
1210 && check_filter(elp, FLOG, partial_dir + module_dirlen, 1) < 0) {
1212 rprintf(FERROR, "Your options have been rejected by the server.\n");
1213 exit_cleanup(RERR_SYNTAX);
1217 exit_code = do_recv(f_in, f_out, local_name);
1218 exit_cleanup(exit_code);
1222 int child_main(int argc, char *argv[])
1224 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1229 void start_server(int f_in, int f_out, int argc, char *argv[])
1231 set_nonblocking(f_in);
1232 set_nonblocking(f_out);
1234 io_set_sock_fds(f_in, f_out);
1235 setup_protocol(f_out, f_in);
1237 if (protocol_version >= 23)
1238 io_start_multiplex_out(f_out);
1239 if (am_daemon && io_timeout && protocol_version >= 31)
1240 send_msg_int(MSG_IO_TIMEOUT, io_timeout);
1243 keep_dirlinks = 0; /* Must be disabled on the sender. */
1244 if (need_messages_from_generator)
1245 io_start_multiplex_in(f_in);
1247 io_start_buffering_in(f_in);
1248 recv_filter_list(f_in);
1249 do_server_sender(f_in, f_out, argc, argv);
1251 do_server_recv(f_in, f_out, argc, argv);
1255 /* This is called once the connection has been negotiated. It is used
1256 * for rsyncd, remote-shell, and local connections. */
1257 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
1259 struct file_list *flist = NULL;
1260 int exit_code = 0, exit_code2 = 0;
1261 char *local_name = NULL;
1263 cleanup_child_pid = pid;
1265 set_nonblocking(f_in);
1266 set_nonblocking(f_out);
1269 io_set_sock_fds(f_in, f_out);
1270 setup_protocol(f_out,f_in);
1272 /* We set our stderr file handle to blocking because ssh might have
1273 * set it to non-blocking. This can be particularly troublesome if
1274 * stderr is a clone of stdout, because ssh would have set our stdout
1275 * to non-blocking at the same time (which can easily cause us to lose
1276 * output from our print statements). This kluge shouldn't cause ssh
1277 * any problems for how we use it. Note also that we delayed setting
1278 * this until after the above protocol setup so that we know for sure
1279 * that ssh is done twiddling its file descriptors. */
1280 set_blocking(STDERR_FILENO);
1283 keep_dirlinks = 0; /* Must be disabled on the sender. */
1286 && (log_format_has(stdout_format, 'C')
1287 || log_format_has(logfile_format, 'C')))
1288 sender_keeps_checksum = 1;
1290 if (protocol_version >= 30)
1291 io_start_multiplex_out(f_out);
1293 io_start_buffering_out(f_out);
1294 if (protocol_version >= 31 || (!filesfrom_host && protocol_version >= 23))
1295 io_start_multiplex_in(f_in);
1297 io_start_buffering_in(f_in);
1298 send_filter_list(f_out);
1300 filesfrom_fd = f_in;
1302 if (write_batch && !am_server)
1303 start_write_batch(f_out);
1305 become_copy_as_user();
1307 flist = send_file_list(f_out, argc, argv);
1308 if (DEBUG_GTE(FLIST, 3))
1309 rprintf(FINFO,"file list sent\n");
1311 if (protocol_version < 31 && filesfrom_host && protocol_version >= 23)
1312 io_start_multiplex_in(f_in);
1314 io_flush(NORMAL_FLUSH);
1315 send_files(f_in, f_out);
1316 io_flush(FULL_FLUSH);
1318 if (protocol_version >= 24)
1319 read_final_goodbye(f_in, f_out);
1321 if (DEBUG_GTE(EXIT, 2))
1322 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
1323 io_flush(FULL_FLUSH);
1324 wait_process_with_flush(pid, &exit_code);
1327 io_flush(FULL_FLUSH);
1328 exit_cleanup(exit_code);
1332 if (protocol_version >= 23)
1333 io_start_multiplex_in(f_in);
1334 if (need_messages_from_generator)
1335 io_start_multiplex_out(f_out);
1337 io_start_buffering_out(f_out);
1340 become_copy_as_user();
1342 send_filter_list(read_batch ? -1 : f_out);
1344 if (filesfrom_fd >= 0) {
1345 start_filesfrom_forwarding(filesfrom_fd);
1349 if (write_batch && !am_server)
1350 start_write_batch(f_in);
1351 flist = recv_file_list(f_in, -1);
1352 if (inc_recurse && file_total == 1)
1353 recv_additional_file_list(f_in);
1355 if (flist && flist->used > 0) {
1356 local_name = get_local_name(flist, argv[0]);
1358 check_alt_basis_dirs();
1360 exit_code2 = do_recv(f_in, f_out, local_name);
1367 if (DEBUG_GTE(RECV, 1))
1368 rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
1369 io_flush(FULL_FLUSH);
1370 wait_process_with_flush(pid, &exit_code);
1373 return MAX(exit_code, exit_code2);
1376 static void dup_argv(char *argv[])
1380 for (i = 0; argv[i]; i++)
1381 argv[i] = strdup(argv[i]);
1385 /* Start a client for either type of remote connection. Work out
1386 * whether the arguments request a remote shell or rsyncd connection,
1387 * and call the appropriate connection function, then run_client.
1389 * Calls either start_socket_client (for sockets) or do_cmd and
1390 * client_run (for ssh). */
1391 static int start_client(int argc, char *argv[])
1393 char *p, *shell_machine = NULL, *shell_user = NULL;
1395 int remote_argc, env_port = rsync_port;
1400 /* Don't clobber argv[] so that ps(1) can still show the right
1404 if (!read_batch) { /* for read_batch, NO source is specified */
1405 char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1406 if (path) { /* source is remote */
1413 if (argc == 1 || **argv == ':')
1414 argc = 0; /* no dest arg */
1415 else if (check_for_hostspec(*argv, &dummy_host, &dummy_port)) {
1417 "The source and destination cannot both be remote.\n");
1418 exit_cleanup(RERR_SYNTAX);
1420 remote_argc--; /* don't count dest */
1423 if (filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) {
1425 "--files-from hostname is not the same as the transfer hostname\n");
1426 exit_cleanup(RERR_SYNTAX);
1430 daemon_connection = shell_cmd ? 1 : -1;
1431 } else { /* source is local, check dest arg */
1436 remote_argv = argv + argc;
1438 static char *dotarg[1] = { "." };
1440 remote_argv = dotarg;
1444 path = check_for_hostspec(p, &shell_machine, &rsync_port);
1445 if (path && filesfrom_host && *filesfrom_host && strcmp(filesfrom_host, shell_machine) != 0) {
1447 "--files-from hostname is not the same as the transfer hostname\n");
1448 exit_cleanup(RERR_SYNTAX);
1450 if (!path) { /* no hostspec found, so src & dest are local */
1452 if (filesfrom_host) {
1454 "--files-from cannot be remote when the transfer is local\n");
1455 exit_cleanup(RERR_SYNTAX);
1457 shell_machine = NULL;
1459 } else { /* hostspec was found, so dest is remote */
1462 daemon_connection = shell_cmd ? 1 : -1;
1465 } else { /* read_batch */
1467 if (check_for_hostspec(argv[argc-1], &shell_machine, &rsync_port)) {
1468 rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1469 exit_cleanup(RERR_SYNTAX);
1471 remote_argv = argv += argc - 1;
1472 remote_argc = argc = 1;
1476 /* A local transfer doesn't unbackslash anything, so leave the args alone. */
1480 if (!rsync_port && remote_argc && !**remote_argv) /* Turn an empty arg into a dot dir. */
1485 int dummy_port = rsync_port;
1489 /* For local source, extra source args must not have hostspec. */
1490 for (i = 1; i < argc; i++) {
1493 rprintf(FERROR, "Empty source arg specified.\n");
1494 exit_cleanup(RERR_SYNTAX);
1496 if (check_for_hostspec(argv[i], &dummy_host, &dummy_port)) {
1497 rprintf(FERROR, "Unexpected remote arg: %s\n", argv[i]);
1498 exit_cleanup(RERR_SYNTAX);
1503 int dummy_port = rsync_port;
1505 if (filesfrom_fd < 0)
1506 add_implied_include(remote_argv[0]);
1507 /* For remote source, any extra source args must have either
1508 * the same hostname or an empty hostname. */
1509 for (i = 1; i < remote_argc; i++) {
1510 char *arg = check_for_hostspec(remote_argv[i], &dummy_host, &dummy_port);
1512 rprintf(FERROR, "Unexpected local arg: %s\n", remote_argv[i]);
1513 rprintf(FERROR, "If arg is a remote file/dir, prefix it with a colon (:).\n");
1514 exit_cleanup(RERR_SYNTAX);
1516 if (*dummy_host && strcmp(dummy_host, shell_machine) != 0) {
1517 rprintf(FERROR, "All source args must come from the same machine.\n");
1518 exit_cleanup(RERR_SYNTAX);
1520 if (rsync_port != dummy_port) {
1521 if (!rsync_port || !dummy_port)
1522 rprintf(FERROR, "All source args must use the same hostspec format.\n");
1524 rprintf(FERROR, "All source args must use the same port number.\n");
1525 exit_cleanup(RERR_SYNTAX);
1527 if (!rsync_port && !*arg) /* Turn an empty arg into a dot dir. */
1529 remote_argv[i] = arg;
1530 add_implied_include(arg);
1535 rsync_port = RSYNC_PORT;
1537 env_port = rsync_port;
1539 if (daemon_connection < 0)
1540 return start_socket_client(shell_machine, remote_argc, remote_argv, argc, argv);
1542 if (password_file && !daemon_connection) {
1543 rprintf(FERROR, "The --password-file option may only be "
1544 "used when accessing an rsync daemon.\n");
1545 exit_cleanup(RERR_SYNTAX);
1548 if (connect_timeout) {
1549 rprintf(FERROR, "The --contimeout option may only be "
1550 "used when connecting to an rsync daemon.\n");
1551 exit_cleanup(RERR_SYNTAX);
1554 if (shell_machine) {
1555 p = strrchr(shell_machine,'@');
1558 shell_user = shell_machine;
1559 shell_machine = p+1;
1563 if (DEBUG_GTE(CMD, 2)) {
1564 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1565 NS(shell_cmd), NS(shell_machine), NS(shell_user),
1566 NS(remote_argv[0]));
1570 if (daemon_connection)
1571 set_env_num("RSYNC_PORT", env_port);
1576 pid = do_cmd(shell_cmd, shell_machine, shell_user, remote_argv, remote_argc, &f_in, &f_out);
1578 /* if we're running an rsync server on the remote host over a
1579 * remote shell command, we need to do the RSYNCD protocol first */
1580 if (daemon_connection) {
1582 tmpret = start_inband_exchange(f_in, f_out, shell_user, remote_argc, remote_argv);
1587 ret = client_run(f_in, f_out, pid, argc, argv);
1596 static void sigusr1_handler(UNUSED(int val))
1598 called_from_signal_handler = 1;
1599 exit_cleanup(RERR_SIGNAL1);
1602 static void sigusr2_handler(UNUSED(int val))
1608 _exit(RERR_PARTIAL);
1612 #if defined SIGINFO || defined SIGVTALRM
1613 static void siginfo_handler(UNUSED(int val))
1615 if (!am_server && !INFO_GTE(PROGRESS, 1))
1616 want_progress_now = True;
1620 void remember_children(UNUSED(int val))
1625 /* An empty waitpid() loop was put here by Tridge and we could never
1626 * get him to explain why he put it in, so rather than taking it
1627 * out we're instead saving the child exit statuses for later use.
1628 * The waitpid() loop presumably eliminates all possibility of leaving
1629 * zombie children, maybe that's why he did it. */
1630 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1631 /* save the child's exit status */
1632 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1633 if (pid_stat_table[cnt].pid == 0) {
1634 pid_stat_table[cnt].pid = pid;
1635 pid_stat_table[cnt].status = status;
1641 #ifndef HAVE_SIGACTION
1642 signal(SIGCHLD, remember_children);
1647 * This routine catches signals and tries to send them to gdb.
1649 * Because it's called from inside a signal handler it ought not to
1650 * use too many library routines.
1652 * @todo Perhaps use "screen -X" instead/as well, to help people
1653 * debugging without easy access to X. Perhaps use an environment
1654 * variable, or just call a script?
1656 * @todo The /proc/ magic probably only works on Linux (and
1657 * Solaris?) Can we be more portable?
1659 #ifdef MAINTAINER_MODE
1660 const char *get_panic_action(void)
1662 const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1666 return "xterm -display :0 -T Panic -n Panic -e gdb /proc/%d/exe %d";
1670 * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1672 * This signal handler is only installed if we were configured with
1673 * --enable-maintainer-mode. Perhaps it should always be on and we
1674 * should just look at the environment variable, but I'm a bit leery
1675 * of a signal sending us into a busy loop.
1677 static void rsync_panic_handler(UNUSED(int whatsig))
1680 int ret, pid_int = getpid();
1682 snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(), pid_int, pid_int);
1684 /* Unless we failed to execute gdb, we allow the process to
1685 * continue. I'm not sure if that's right. */
1686 ret = shell_exec(cmd_buf);
1692 static void unset_env_var(const char *var)
1694 #ifdef HAVE_UNSETENV
1699 if (asprintf(&mem, "%s=", var) < 0)
1700 out_of_memory("unset_env_var");
1709 int main(int argc,char *argv[])
1716 #ifdef HAVE_SIGACTION
1717 # ifdef HAVE_SIGPROCMASK
1720 sigemptyset(&sigmask);
1722 sigact.sa_flags = SA_NOCLDSTOP;
1724 SIGACTMASK(SIGUSR1, sigusr1_handler);
1725 SIGACTMASK(SIGUSR2, sigusr2_handler);
1726 SIGACTMASK(SIGCHLD, remember_children);
1727 #ifdef MAINTAINER_MODE
1728 SIGACTMASK(SIGSEGV, rsync_panic_handler);
1729 SIGACTMASK(SIGFPE, rsync_panic_handler);
1730 SIGACTMASK(SIGABRT, rsync_panic_handler);
1731 SIGACTMASK(SIGBUS, rsync_panic_handler);
1734 SIGACTMASK(SIGINFO, siginfo_handler);
1737 SIGACTMASK(SIGVTALRM, siginfo_handler);
1740 starttime = time(NULL);
1743 am_root = our_uid == ROOT_UID;
1745 unset_env_var("DISPLAY");
1747 memset(&stats, 0, sizeof(stats));
1749 /* Even a non-daemon runs needs the default config values to be set, e.g.
1750 * lp_dont_compress() is queried when no --skip-compress option is set. */
1751 reset_daemon_vars();
1755 exit_cleanup(RERR_SYNTAX);
1758 /* Get the umask for use in permission calculations. We no longer set
1759 * it to zero; that is ugly and pointless now that all the callers that
1760 * relied on it have been reeducated to work with default ACLs. */
1761 umask(orig_umask = umask(0));
1763 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1764 setlocale(LC_CTYPE, "");
1765 setlocale(LC_NUMERIC, "");
1768 if (!parse_arguments(&argc, (const char ***) &argv)) {
1770 exit_cleanup(RERR_SYNTAX);
1773 && poptDupArgv(argc, (const char **)argv, &cooked_argc, (const char ***)&cooked_argv) != 0)
1774 out_of_memory("main");
1776 SIGACTMASK(SIGINT, sig_int);
1777 SIGACTMASK(SIGHUP, sig_int);
1778 SIGACTMASK(SIGTERM, sig_int);
1779 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1780 sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1783 /* Ignore SIGPIPE; we consistently check error codes and will
1785 SIGACTION(SIGPIPE, SIG_IGN);
1787 SIGACTION(SIGXFSZ, SIG_IGN);
1790 /* Initialize change_dir() here because on some old systems getcwd
1791 * (implemented by forking "pwd" and reading its output) doesn't
1792 * work when there are other child processes. Also, on all systems
1793 * that implement getcwd that way "pwd" can't be found after chroot. */
1794 change_dir(NULL, CD_NORMAL);
1796 if ((write_batch || read_batch) && !am_server) {
1797 open_batch_files(); /* sets batch_fd */
1799 read_stream_flags(batch_fd);
1801 write_stream_flags(batch_fd);
1803 if (write_batch < 0)
1810 } else if (am_daemon)
1811 return daemon_main();
1813 if (am_server && protect_args) {
1814 char buf[MAXPATHLEN];
1816 read_args(STDIN_FILENO, NULL, buf, sizeof buf, 1, &argv, &argc, NULL);
1817 if (!parse_arguments(&argc, (const char ***) &argv)) {
1819 exit_cleanup(RERR_SYNTAX);
1825 exit_cleanup(RERR_SYNTAX);
1829 set_nonblocking(STDIN_FILENO);
1830 set_nonblocking(STDOUT_FILENO);
1832 return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1833 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1836 ret = start_client(argc, argv);
1838 exit_cleanup(RERR_STARTCLIENT);