1: /*
2: * The startup routines, including main(), for rsync.
3: *
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) 2003-2009 Wayne Davison
8: *
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.
13: *
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.
18: *
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.
21: */
22:
23: #include "rsync.h"
24: #include "ifuncs.h"
25: #include "io.h"
26: #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H
27: #include <locale.h>
28: #endif
29:
30: extern int verbose;
31: extern int dry_run;
32: extern int list_only;
33: extern int am_root;
34: extern int am_server;
35: extern int am_sender;
36: extern int am_daemon;
37: extern int inc_recurse;
38: extern int blocking_io;
39: extern int remove_source_files;
40: extern int need_messages_from_generator;
41: extern int kluge_around_eof;
42: extern int do_stats;
43: extern int got_xfer_error;
44: extern int module_id;
45: extern int copy_links;
46: extern int copy_dirlinks;
47: extern int copy_unsafe_links;
48: extern int keep_dirlinks;
49: extern int preserve_hard_links;
50: extern int protocol_version;
51: extern int file_total;
52: extern int recurse;
53: extern int xfer_dirs;
54: extern int protect_args;
55: extern int relative_paths;
56: extern int sanitize_paths;
57: extern int curr_dir_depth;
58: extern int curr_dir_len;
59: extern int module_id;
60: extern int rsync_port;
61: extern int whole_file;
62: extern int read_batch;
63: extern int write_batch;
64: extern int batch_fd;
65: extern int filesfrom_fd;
66: extern int connect_timeout;
67: extern dev_t filesystem_dev;
68: extern pid_t cleanup_child_pid;
69: extern unsigned int module_dirlen;
70: extern struct stats stats;
71: extern char *filesfrom_host;
72: extern char *partial_dir;
73: extern char *dest_option;
74: extern char *basis_dir[MAX_BASIS_DIRS+1];
75: extern char *rsync_path;
76: extern char *shell_cmd;
77: extern char *batch_name;
78: extern char *password_file;
79: extern char curr_dir[MAXPATHLEN];
80: extern struct file_list *first_flist;
81: extern struct filter_list_struct daemon_filter_list;
82:
83: uid_t our_uid;
84: int am_receiver = 0; /* Only set to 1 after the receiver/generator fork. */
85: int am_generator = 0; /* Only set to 1 after the receiver/generator fork. */
86: int local_server = 0;
87: int daemon_over_rsh = 0;
88: mode_t orig_umask = 0;
89: int batch_gen_fd = -1;
90:
91: /* There's probably never more than at most 2 outstanding child processes,
92: * but set it higher, just in case. */
93: #define MAXCHILDPROCS 7
94:
95: #ifdef HAVE_SIGACTION
96: # ifdef HAVE_SIGPROCMASK
97: # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
98: # else
99: # define SIGACTMASK(n,h) SIGACTION(n,h)
100: # endif
101: static struct sigaction sigact;
102: #endif
103:
104: struct pid_status {
105: pid_t pid;
106: int status;
107: } pid_stat_table[MAXCHILDPROCS];
108:
109: static time_t starttime, endtime;
110: static int64 total_read, total_written;
111:
112: static void show_malloc_stats(void);
113:
114: /* Works like waitpid(), but if we already harvested the child pid in our
115: * remember_children(), we succeed instead of returning an error. */
116: pid_t wait_process(pid_t pid, int *status_ptr, int flags)
117: {
118: pid_t waited_pid;
119:
120: do {
121: waited_pid = waitpid(pid, status_ptr, flags);
122: } while (waited_pid == -1 && errno == EINTR);
123:
124: if (waited_pid == -1 && errno == ECHILD) {
125: /* Status of requested child no longer available: check to
126: * see if it was processed by remember_children(). */
127: int cnt;
128: for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
129: if (pid == pid_stat_table[cnt].pid) {
130: *status_ptr = pid_stat_table[cnt].status;
131: pid_stat_table[cnt].pid = 0;
132: return pid;
133: }
134: }
135: }
136:
137: return waited_pid;
138: }
139:
140: /* Wait for a process to exit, calling io_flush while waiting. */
141: static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
142: {
143: pid_t waited_pid;
144: int status;
145:
146: while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
147: msleep(20);
148: io_flush(FULL_FLUSH);
149: }
150:
151: /* TODO: If the child exited on a signal, then log an
152: * appropriate error message. Perhaps we should also accept a
153: * message describing the purpose of the child. Also indicate
154: * this to the caller so that they know something went wrong. */
155: if (waited_pid < 0) {
156: rsyserr(FERROR, errno, "waitpid");
157: *exit_code_ptr = RERR_WAITCHILD;
158: } else if (!WIFEXITED(status)) {
159: #ifdef WCOREDUMP
160: if (WCOREDUMP(status))
161: *exit_code_ptr = RERR_CRASHED;
162: else
163: #endif
164: if (WIFSIGNALED(status))
165: *exit_code_ptr = RERR_TERMINATED;
166: else
167: *exit_code_ptr = RERR_WAITCHILD;
168: } else
169: *exit_code_ptr = WEXITSTATUS(status);
170: }
171:
172: /* This function gets called from all 3 processes. We want the client side
173: * to actually output the text, but the sender is the only process that has
174: * all the stats we need. So, if we're a client sender, we do the report.
175: * If we're a server sender, we write the stats on the supplied fd. If
176: * we're the client receiver we read the stats from the supplied fd and do
177: * the report. All processes might also generate a set of debug stats, if
178: * the verbose level is high enough (this is the only thing that the
179: * generator process and the server receiver ever do here). */
180: static void handle_stats(int f)
181: {
182: endtime = time(NULL);
183:
184: /* Cache two stats because the read/write code can change it. */
185: total_read = stats.total_read;
186: total_written = stats.total_written;
187:
188: if (do_stats && verbose > 1) {
189: /* These come out from every process */
190: show_malloc_stats();
191: show_flist_stats();
192: }
193:
194: if (am_generator)
195: return;
196:
197: if (am_daemon) {
198: if (f == -1 || !am_sender)
199: return;
200: }
201:
202: if (am_server) {
203: if (am_sender) {
204: write_varlong30(f, total_read, 3);
205: write_varlong30(f, total_written, 3);
206: write_varlong30(f, stats.total_size, 3);
207: if (protocol_version >= 29) {
208: write_varlong30(f, stats.flist_buildtime, 3);
209: write_varlong30(f, stats.flist_xfertime, 3);
210: }
211: }
212: return;
213: }
214:
215: /* this is the client */
216:
217: if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
218: ;
219: else if (!am_sender) {
220: /* Read the first two in opposite order because the meaning of
221: * read/write swaps when switching from sender to receiver. */
222: total_written = read_varlong30(f, 3);
223: total_read = read_varlong30(f, 3);
224: stats.total_size = read_varlong30(f, 3);
225: if (protocol_version >= 29) {
226: stats.flist_buildtime = read_varlong30(f, 3);
227: stats.flist_xfertime = read_varlong30(f, 3);
228: }
229: } else if (write_batch) {
230: /* The --read-batch process is going to be a client
231: * receiver, so we need to give it the stats. */
232: write_varlong30(batch_fd, total_read, 3);
233: write_varlong30(batch_fd, total_written, 3);
234: write_varlong30(batch_fd, stats.total_size, 3);
235: if (protocol_version >= 29) {
236: write_varlong30(batch_fd, stats.flist_buildtime, 3);
237: write_varlong30(batch_fd, stats.flist_xfertime, 3);
238: }
239: }
240: }
241:
242: static void output_summary(void)
243: {
244: if (do_stats) {
245: rprintf(FCLIENT, "\n");
246: rprintf(FINFO,"Number of files: %d\n", stats.num_files);
247: rprintf(FINFO,"Number of files transferred: %d\n",
248: stats.num_transferred_files);
249: rprintf(FINFO,"Total file size: %s bytes\n",
250: human_num(stats.total_size));
251: rprintf(FINFO,"Total transferred file size: %s bytes\n",
252: human_num(stats.total_transferred_size));
253: rprintf(FINFO,"Literal data: %s bytes\n",
254: human_num(stats.literal_data));
255: rprintf(FINFO,"Matched data: %s bytes\n",
256: human_num(stats.matched_data));
257: rprintf(FINFO,"File list size: %s\n",
258: human_num(stats.flist_size));
259: if (stats.flist_buildtime) {
260: rprintf(FINFO,
261: "File list generation time: %.3f seconds\n",
262: (double)stats.flist_buildtime / 1000);
263: rprintf(FINFO,
264: "File list transfer time: %.3f seconds\n",
265: (double)stats.flist_xfertime / 1000);
266: }
267: rprintf(FINFO,"Total bytes sent: %s\n",
268: human_num(total_written));
269: rprintf(FINFO,"Total bytes received: %s\n",
270: human_num(total_read));
271: }
272:
273: if (verbose || do_stats) {
274: rprintf(FCLIENT, "\n");
275: rprintf(FINFO,
276: "sent %s bytes received %s bytes %s bytes/sec\n",
277: human_num(total_written), human_num(total_read),
278: human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2));
279: rprintf(FINFO, "total size is %s speedup is %.2f%s\n",
280: human_num(stats.total_size),
281: (double)stats.total_size / (total_written+total_read),
282: write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : "");
283: }
284:
285: fflush(stdout);
286: fflush(stderr);
287: }
288:
289:
290: /**
291: * If our C library can get malloc statistics, then show them to FINFO
292: **/
293: static void show_malloc_stats(void)
294: {
295: #ifdef HAVE_MALLINFO
296: struct mallinfo mi;
297:
298: mi = mallinfo();
299:
300: rprintf(FCLIENT, "\n");
301: rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
302: getpid(), am_server ? "server " : "",
303: am_daemon ? "daemon " : "", who_am_i());
304: rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
305: (long)mi.arena);
306: rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
307: (long)mi.ordblks);
308: rprintf(FINFO, " smblks: %10ld\n",
309: (long)mi.smblks);
310: rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
311: (long)mi.hblks);
312: rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
313: (long)mi.hblkhd);
314: rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
315: (long)mi.arena + mi.hblkhd);
316: rprintf(FINFO, " usmblks: %10ld\n",
317: (long)mi.usmblks);
318: rprintf(FINFO, " fsmblks: %10ld\n",
319: (long)mi.fsmblks);
320: rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
321: (long)mi.uordblks);
322: rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
323: (long)mi.fordblks);
324: rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
325: (long)mi.keepcost);
326: #endif /* HAVE_MALLINFO */
327: }
328:
329:
330: /* Start the remote shell. cmd may be NULL to use the default. */
331: static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc,
332: int *f_in_p, int *f_out_p)
333: {
334: int i, argc = 0;
335: char *args[MAX_ARGS];
336: pid_t pid;
337: int dash_l_set = 0;
338:
339: if (!read_batch && !local_server) {
340: char *t, *f, in_quote = '\0';
341: char *rsh_env = getenv(RSYNC_RSH_ENV);
342: if (!cmd)
343: cmd = rsh_env;
344: if (!cmd)
345: cmd = RSYNC_RSH;
346: cmd = strdup(cmd); /* MEMORY LEAK */
347: if (!cmd)
348: goto oom;
349:
350: for (t = f = cmd; *f; f++) {
351: if (*f == ' ')
352: continue;
353: /* Comparison leaves rooms for server_options(). */
354: if (argc >= MAX_ARGS - MAX_SERVER_ARGS)
355: goto arg_overflow;
356: args[argc++] = t;
357: while (*f != ' ' || in_quote) {
358: if (!*f) {
359: if (in_quote) {
360: rprintf(FERROR,
361: "Missing trailing-%c in remote-shell command.\n",
362: in_quote);
363: exit_cleanup(RERR_SYNTAX);
364: }
365: f--;
366: break;
367: }
368: if (*f == '\'' || *f == '"') {
369: if (!in_quote) {
370: in_quote = *f++;
371: continue;
372: }
373: if (*f == in_quote && *++f != in_quote) {
374: in_quote = '\0';
375: continue;
376: }
377: }
378: *t++ = *f++;
379: }
380: *t++ = '\0';
381: }
382:
383: /* check to see if we've already been given '-l user' in
384: * the remote-shell command */
385: for (i = 0; i < argc-1; i++) {
386: if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
387: dash_l_set = 1;
388: }
389:
390: #ifdef HAVE_REMSH
391: /* remsh (on HPUX) takes the arguments the other way around */
392: args[argc++] = machine;
393: if (user && !(daemon_over_rsh && dash_l_set)) {
394: args[argc++] = "-l";
395: args[argc++] = user;
396: }
397: #else
398: if (user && !(daemon_over_rsh && dash_l_set)) {
399: args[argc++] = "-l";
400: args[argc++] = user;
401: }
402: args[argc++] = machine;
403: #endif
404:
405: args[argc++] = rsync_path;
406:
407: if (blocking_io < 0) {
408: char *cp;
409: if ((cp = strrchr(cmd, '/')) != NULL)
410: cp++;
411: else
412: cp = cmd;
413: if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
414: blocking_io = 1;
415: }
416:
417: server_options(args,&argc);
418:
419: if (argc >= MAX_ARGS - 2)
420: goto arg_overflow;
421: }
422:
423: args[argc++] = ".";
424:
425: if (!daemon_over_rsh) {
426: while (remote_argc > 0) {
427: if (argc >= MAX_ARGS - 1) {
428: arg_overflow:
429: rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
430: exit_cleanup(RERR_SYNTAX);
431: }
432: if (**remote_argv == '-') {
433: if (asprintf(args + argc++, "./%s", *remote_argv++) < 0)
434: out_of_memory("do_cmd");
435: } else
436: args[argc++] = *remote_argv++;
437: remote_argc--;
438: }
439: }
440:
441: args[argc] = NULL;
442:
443: if (verbose > 3) {
444: for (i = 0; i < argc; i++)
445: rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]);
446: rprintf(FCLIENT, "\n");
447: }
448:
449: if (read_batch) {
450: int from_gen_pipe[2];
451: set_allow_inc_recurse();
452: if (fd_pair(from_gen_pipe) < 0) {
453: rsyserr(FERROR, errno, "pipe");
454: exit_cleanup(RERR_IPC);
455: }
456: batch_gen_fd = from_gen_pipe[0];
457: *f_out_p = from_gen_pipe[1];
458: *f_in_p = batch_fd;
459: pid = (pid_t)-1; /* no child pid */
460: #ifdef ICONV_CONST
461: setup_iconv();
462: #endif
463: } else if (local_server) {
464: /* If the user didn't request --[no-]whole-file, force
465: * it on, but only if we're not batch processing. */
466: if (whole_file < 0 && !write_batch)
467: whole_file = 1;
468: set_allow_inc_recurse();
469: pid = local_child(argc, args, f_in_p, f_out_p, child_main);
470: #ifdef ICONV_CONST
471: setup_iconv();
472: #endif
473: } else {
474: pid = piped_child(args, f_in_p, f_out_p);
475: #ifdef ICONV_CONST
476: setup_iconv();
477: #endif
478: if (protect_args && !daemon_over_rsh)
479: send_protected_args(*f_out_p, args);
480: }
481:
482: return pid;
483:
484: oom:
485: out_of_memory("do_cmd");
486: return 0; /* not reached */
487: }
488:
489: /* The receiving side operates in one of two modes:
490: *
491: * 1. it receives any number of files into a destination directory,
492: * placing them according to their names in the file-list.
493: *
494: * 2. it receives a single file and saves it using the name in the
495: * destination path instead of its file-list name. This requires a
496: * "local name" for writing out the destination file.
497: *
498: * So, our task is to figure out what mode/local-name we need.
499: * For mode 1, we change into the destination directory and return NULL.
500: * For mode 2, we change into the directory containing the destination
501: * file (if we aren't already there) and return the local-name. */
502: static char *get_local_name(struct file_list *flist, char *dest_path)
503: {
504: STRUCT_STAT st;
505: int statret;
506: char *cp;
507:
508: if (verbose > 2) {
509: rprintf(FINFO, "get_local_name count=%d %s\n",
510: file_total, NS(dest_path));
511: }
512:
513: if (!dest_path || list_only)
514: return NULL;
515:
516: /* Treat an empty string as a copy into the current directory. */
517: if (!*dest_path)
518: dest_path = ".";
519:
520: if (daemon_filter_list.head) {
521: char *slash = strrchr(dest_path, '/');
522: if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0')))
523: *slash = '\0';
524: else
525: slash = NULL;
526: if ((*dest_path != '.' || dest_path[1] != '\0')
527: && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0
528: || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) {
529: rprintf(FERROR, "ERROR: daemon has excluded destination \"%s\"\n",
530: dest_path);
531: exit_cleanup(RERR_FILESELECT);
532: }
533: if (slash)
534: *slash = '/';
535: }
536:
537: /* See what currently exists at the destination. */
538: if ((statret = do_stat(dest_path, &st)) == 0) {
539: /* If the destination is a dir, enter it and use mode 1. */
540: if (S_ISDIR(st.st_mode)) {
541: if (!change_dir(dest_path, CD_NORMAL)) {
542: rsyserr(FERROR, errno, "change_dir#1 %s failed",
543: full_fname(dest_path));
544: exit_cleanup(RERR_FILESELECT);
545: }
546: filesystem_dev = st.st_dev; /* ensures --force works right w/-x */
547: return NULL;
548: }
549: if (file_total > 1) {
550: rprintf(FERROR,
551: "ERROR: destination must be a directory when"
552: " copying more than 1 file\n");
553: exit_cleanup(RERR_FILESELECT);
554: }
555: if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) {
556: rprintf(FERROR,
557: "ERROR: cannot overwrite non-directory"
558: " with a directory\n");
559: exit_cleanup(RERR_FILESELECT);
560: }
561: } else if (errno != ENOENT) {
562: /* If we don't know what's at the destination, fail. */
563: rsyserr(FERROR, errno, "ERROR: cannot stat destination %s",
564: full_fname(dest_path));
565: exit_cleanup(RERR_FILESELECT);
566: }
567:
568: cp = strrchr(dest_path, '/');
569:
570: /* If we need a destination directory because the transfer is not
571: * of a single non-directory or the user has requested one via a
572: * destination path ending in a slash, create one and use mode 1. */
573: if (file_total > 1 || (cp && !cp[1])) {
574: /* Lop off the final slash (if any). */
575: if (cp && !cp[1])
576: *cp = '\0';
577:
578: if (statret == 0) {
579: rprintf(FERROR,
580: "ERROR: destination path is not a directory\n");
581: exit_cleanup(RERR_SYNTAX);
582: }
583:
584: if (mkdir_defmode(dest_path) != 0) {
585: rsyserr(FERROR, errno, "mkdir %s failed",
586: full_fname(dest_path));
587: exit_cleanup(RERR_FILEIO);
588: }
589:
590: if (flist->high >= flist->low
591: && strcmp(flist->files[flist->low]->basename, ".") == 0)
592: flist->files[0]->flags |= FLAG_DIR_CREATED;
593:
594: if (verbose)
595: rprintf(FINFO, "created directory %s\n", dest_path);
596:
597: if (dry_run) {
598: /* Indicate that dest dir doesn't really exist. */
599: dry_run++;
600: }
601:
602: if (!change_dir(dest_path, dry_run > 1 ? CD_SKIP_CHDIR : CD_NORMAL)) {
603: rsyserr(FERROR, errno, "change_dir#2 %s failed",
604: full_fname(dest_path));
605: exit_cleanup(RERR_FILESELECT);
606: }
607:
608: return NULL;
609: }
610:
611: /* Otherwise, we are writing a single file, possibly on top of an
612: * existing non-directory. Change to the item's parent directory
613: * (if it has a path component), return the basename of the
614: * destination file as the local name, and use mode 2. */
615: if (!cp)
616: return dest_path;
617:
618: if (cp == dest_path)
619: dest_path = "/";
620:
621: *cp = '\0';
622: if (!change_dir(dest_path, CD_NORMAL)) {
623: rsyserr(FERROR, errno, "change_dir#3 %s failed",
624: full_fname(dest_path));
625: exit_cleanup(RERR_FILESELECT);
626: }
627: *cp = '/';
628:
629: return cp + 1;
630: }
631:
632: /* This function checks on our alternate-basis directories. If we're in
633: * dry-run mode and the destination dir does not yet exist, we'll try to
634: * tweak any dest-relative paths to make them work for a dry-run (the
635: * destination dir must be in curr_dir[] when this function is called).
636: * We also warn about any arg that is non-existent or not a directory. */
637: static void check_alt_basis_dirs(void)
638: {
639: STRUCT_STAT st;
640: char **dir_p, *slash = strrchr(curr_dir, '/');
641:
642: for (dir_p = basis_dir; *dir_p; dir_p++) {
643: if (dry_run > 1 && **dir_p != '/') {
644: int len = curr_dir_len + 1 + strlen(*dir_p) + 1;
645: char *new = new_array(char, len);
646: if (!new)
647: out_of_memory("check_alt_basis_dirs");
648: if (slash && strncmp(*dir_p, "../", 3) == 0) {
649: /* We want to remove only one leading "../" prefix for
650: * the directory we couldn't create in dry-run mode:
651: * this ensures that any other ".." references get
652: * evaluated the same as they would for a live copy. */
653: *slash = '\0';
654: pathjoin(new, len, curr_dir, *dir_p + 3);
655: *slash = '/';
656: } else
657: pathjoin(new, len, curr_dir, *dir_p);
658: *dir_p = new;
659: }
660: if (do_stat(*dir_p, &st) < 0) {
661: rprintf(FWARNING, "%s arg does not exist: %s\n",
662: dest_option, *dir_p);
663: } else if (!S_ISDIR(st.st_mode)) {
664: rprintf(FWARNING, "%s arg is not a dir: %s\n",
665: dest_option, *dir_p);
666: }
667: }
668: }
669:
670: /* This is only called by the sender. */
671: static void read_final_goodbye(int f_in)
672: {
673: int i, iflags, xlen;
674: uchar fnamecmp_type;
675: char xname[MAXPATHLEN];
676:
677: if (protocol_version < 29)
678: i = read_int(f_in);
679: else {
680: i = read_ndx_and_attrs(f_in, &iflags, &fnamecmp_type,
681: xname, &xlen);
682: }
683:
684: if (i != NDX_DONE) {
685: rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
686: i, who_am_i());
687: exit_cleanup(RERR_PROTOCOL);
688: }
689: }
690:
691: static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
692: {
693: struct file_list *flist;
694: char *dir = argv[0];
695:
696: if (verbose > 2) {
697: rprintf(FINFO, "server_sender starting pid=%ld\n",
698: (long)getpid());
699: }
700:
701: if (am_daemon && lp_write_only(module_id)) {
702: rprintf(FERROR, "ERROR: module is write only\n");
703: exit_cleanup(RERR_SYNTAX);
704: return;
705: }
706: if (am_daemon && lp_read_only(module_id) && remove_source_files) {
707: rprintf(FERROR,
708: "ERROR: --remove-%s-files cannot be used with a read-only module\n",
709: remove_source_files == 1 ? "source" : "sent");
710: exit_cleanup(RERR_SYNTAX);
711: return;
712: }
713:
714: if (!relative_paths) {
715: if (!change_dir(dir, CD_NORMAL)) {
716: rsyserr(FERROR, errno, "change_dir#3 %s failed",
717: full_fname(dir));
718: exit_cleanup(RERR_FILESELECT);
719: }
720: }
721: argc--;
722: argv++;
723:
724: if (argc == 0 && (recurse || xfer_dirs || list_only)) {
725: argc = 1;
726: argv--;
727: argv[0] = ".";
728: }
729:
730: flist = send_file_list(f_out,argc,argv);
731: if (!flist || flist->used == 0)
732: exit_cleanup(0);
733:
734: io_start_buffering_in(f_in);
735:
736: send_files(f_in, f_out);
737: io_flush(FULL_FLUSH);
738: handle_stats(f_out);
739: if (protocol_version >= 24)
740: read_final_goodbye(f_in);
741: io_flush(FULL_FLUSH);
742: exit_cleanup(0);
743: }
744:
745:
746: static int do_recv(int f_in, int f_out, char *local_name)
747: {
748: int pid;
749: int exit_code = 0;
750: int error_pipe[2];
751:
752: /* The receiving side mustn't obey this, or an existing symlink that
753: * points to an identical file won't be replaced by the referent. */
754: copy_links = copy_dirlinks = copy_unsafe_links = 0;
755:
756: #ifdef SUPPORT_HARD_LINKS
757: if (preserve_hard_links && !inc_recurse)
758: match_hard_links(first_flist);
759: #endif
760:
761: if (fd_pair(error_pipe) < 0) {
762: rsyserr(FERROR, errno, "pipe failed in do_recv");
763: exit_cleanup(RERR_IPC);
764: }
765:
766: io_flush(NORMAL_FLUSH);
767:
768: if ((pid = do_fork()) == -1) {
769: rsyserr(FERROR, errno, "fork failed in do_recv");
770: exit_cleanup(RERR_IPC);
771: }
772:
773: if (pid == 0) {
774: am_receiver = 1;
775:
776: close(error_pipe[0]);
777: if (f_in != f_out)
778: close(f_out);
779:
780: /* we can't let two processes write to the socket at one time */
781: io_end_multiplex_out();
782:
783: /* set place to send errors */
784: set_msg_fd_out(error_pipe[1]);
785: io_start_buffering_out(error_pipe[1]);
786:
787: recv_files(f_in, local_name);
788: io_flush(FULL_FLUSH);
789: handle_stats(f_in);
790:
791: send_msg(MSG_DONE, "", 1, 0);
792: write_varlong(error_pipe[1], stats.total_read, 3);
793: io_flush(FULL_FLUSH);
794:
795: /* Handle any keep-alive packets from the post-processing work
796: * that the generator does. */
797: if (protocol_version >= 29) {
798: int iflags, xlen;
799: uchar fnamecmp_type;
800: char xname[MAXPATHLEN];
801:
802: kluge_around_eof = -1;
803:
804: /* This should only get stopped via a USR2 signal. */
805: read_ndx_and_attrs(f_in, &iflags, &fnamecmp_type,
806: xname, &xlen);
807:
808: rprintf(FERROR, "Invalid packet at end of run [%s]\n",
809: who_am_i());
810: exit_cleanup(RERR_PROTOCOL);
811: }
812:
813: /* Finally, we go to sleep until our parent kills us with a
814: * USR2 signal. We sleep for a short time, as on some OSes
815: * a signal won't interrupt a sleep! */
816: while (1)
817: msleep(20);
818: }
819:
820: am_generator = 1;
821:
822: io_end_multiplex_in();
823: if (write_batch && !am_server)
824: stop_write_batch();
825:
826: close(error_pipe[1]);
827: if (f_in != f_out)
828: close(f_in);
829:
830: io_start_buffering_out(f_out);
831:
832: set_msg_fd_in(error_pipe[0]);
833: io_start_buffering_in(error_pipe[0]);
834:
835: #ifdef SUPPORT_HARD_LINKS
836: if (preserve_hard_links && inc_recurse) {
837: struct file_list *flist;
838: for (flist = first_flist; flist; flist = flist->next)
839: match_hard_links(flist);
840: }
841: #endif
842:
843: generate_files(f_out, local_name);
844:
845: handle_stats(-1);
846: io_flush(FULL_FLUSH);
847: if (protocol_version >= 24) {
848: /* send a final goodbye message */
849: write_ndx(f_out, NDX_DONE);
850: }
851: io_flush(FULL_FLUSH);
852:
853: set_msg_fd_in(-1);
854: kill(pid, SIGUSR2);
855: wait_process_with_flush(pid, &exit_code);
856: return exit_code;
857: }
858:
859: static void do_server_recv(int f_in, int f_out, int argc, char *argv[])
860: {
861: int exit_code;
862: struct file_list *flist;
863: char *local_name = NULL;
864: int save_verbose = verbose;
865:
866: if (filesfrom_fd >= 0) {
867: /* We can't mix messages with files-from data on the socket,
868: * so temporarily turn off verbose messages. */
869: verbose = 0;
870: }
871:
872: if (verbose > 2) {
873: rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
874: argc, (long)getpid());
875: }
876:
877: if (am_daemon && lp_read_only(module_id)) {
878: rprintf(FERROR,"ERROR: module is read only\n");
879: exit_cleanup(RERR_SYNTAX);
880: return;
881: }
882:
883: if (argc > 0) {
884: char *dir = argv[0];
885: argc--;
886: argv++;
887: if (!am_daemon && !change_dir(dir, CD_NORMAL)) {
888: rsyserr(FERROR, errno, "change_dir#4 %s failed",
889: full_fname(dir));
890: exit_cleanup(RERR_FILESELECT);
891: }
892: }
893:
894: if (protocol_version >= 30)
895: io_start_multiplex_in();
896: else
897: io_start_buffering_in(f_in);
898: recv_filter_list(f_in);
899:
900: if (filesfrom_fd >= 0) {
901: /* We need to send the files-from names to the sender at the
902: * same time that we receive the file-list from them, so we
903: * need the IO routines to automatically write out the names
904: * onto our f_out socket as we read the file-list. This
905: * avoids both deadlock and extra delays/buffers. */
906: io_set_filesfrom_fds(filesfrom_fd, f_out);
907: filesfrom_fd = -1;
908: }
909:
910: flist = recv_file_list(f_in);
911: if (!flist) {
912: rprintf(FERROR,"server_recv: recv_file_list error\n");
913: exit_cleanup(RERR_FILESELECT);
914: }
915: if (inc_recurse && file_total == 1)
916: recv_additional_file_list(f_in);
917: verbose = save_verbose;
918:
919: if (argc > 0)
920: local_name = get_local_name(flist,argv[0]);
921:
922: /* Now that we know what our destination directory turned out to be,
923: * we can sanitize the --link-/copy-/compare-dest args correctly. */
924: if (sanitize_paths) {
925: char **dir_p;
926: for (dir_p = basis_dir; *dir_p; dir_p++)
927: *dir_p = sanitize_path(NULL, *dir_p, NULL, curr_dir_depth, SP_DEFAULT);
928: if (partial_dir)
929: partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, SP_DEFAULT);
930: }
931: check_alt_basis_dirs();
932:
933: if (daemon_filter_list.head) {
934: char **dir_p;
935: struct filter_list_struct *elp = &daemon_filter_list;
936:
937: for (dir_p = basis_dir; *dir_p; dir_p++) {
938: char *dir = *dir_p;
939: if (*dir == '/')
940: dir += module_dirlen;
941: if (check_filter(elp, FLOG, dir, 1) < 0)
942: goto options_rejected;
943: }
944: if (partial_dir && *partial_dir == '/'
945: && check_filter(elp, FLOG, partial_dir + module_dirlen, 1) < 0) {
946: options_rejected:
947: rprintf(FERROR,
948: "Your options have been rejected by the server.\n");
949: exit_cleanup(RERR_SYNTAX);
950: }
951: }
952:
953: exit_code = do_recv(f_in, f_out, local_name);
954: exit_cleanup(exit_code);
955: }
956:
957:
958: int child_main(int argc, char *argv[])
959: {
960: start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
961: return 0;
962: }
963:
964:
965: void start_server(int f_in, int f_out, int argc, char *argv[])
966: {
967: set_nonblocking(f_in);
968: set_nonblocking(f_out);
969:
970: io_set_sock_fds(f_in, f_out);
971: setup_protocol(f_out, f_in);
972:
973: if (protocol_version >= 23)
974: io_start_multiplex_out();
975:
976: if (am_sender) {
977: keep_dirlinks = 0; /* Must be disabled on the sender. */
978: if (need_messages_from_generator)
979: io_start_multiplex_in();
980: recv_filter_list(f_in);
981: do_server_sender(f_in, f_out, argc, argv);
982: } else
983: do_server_recv(f_in, f_out, argc, argv);
984: exit_cleanup(0);
985: }
986:
987:
988: /*
989: * This is called once the connection has been negotiated. It is used
990: * for rsyncd, remote-shell, and local connections.
991: */
992: int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
993: {
994: struct file_list *flist = NULL;
995: int exit_code = 0, exit_code2 = 0;
996: char *local_name = NULL;
997:
998: cleanup_child_pid = pid;
999: if (!read_batch) {
1000: set_nonblocking(f_in);
1001: set_nonblocking(f_out);
1002: }
1003:
1004: io_set_sock_fds(f_in, f_out);
1005: setup_protocol(f_out,f_in);
1006:
1007: /* We set our stderr file handle to blocking because ssh might have
1008: * set it to non-blocking. This can be particularly troublesome if
1009: * stderr is a clone of stdout, because ssh would have set our stdout
1010: * to non-blocking at the same time (which can easily cause us to lose
1011: * output from our print statements). This kluge shouldn't cause ssh
1012: * any problems for how we use it. Note also that we delayed setting
1013: * this until after the above protocol setup so that we know for sure
1014: * that ssh is done twiddling its file descriptors. */
1015: set_blocking(STDERR_FILENO);
1016:
1017: if (am_sender) {
1018: keep_dirlinks = 0; /* Must be disabled on the sender. */
1019: if (protocol_version >= 30)
1020: io_start_multiplex_out();
1021: else
1022: io_start_buffering_out(f_out);
1023: if (!filesfrom_host)
1024: set_msg_fd_in(f_in);
1025: send_filter_list(f_out);
1026: if (filesfrom_host)
1027: filesfrom_fd = f_in;
1028:
1029: if (write_batch && !am_server)
1030: start_write_batch(f_out);
1031: flist = send_file_list(f_out, argc, argv);
1032: if (verbose > 3)
1033: rprintf(FINFO,"file list sent\n");
1034:
1035: if (protocol_version >= 23)
1036: io_start_multiplex_in();
1037:
1038: io_flush(NORMAL_FLUSH);
1039: send_files(f_in, f_out);
1040: io_flush(FULL_FLUSH);
1041: handle_stats(-1);
1042: if (protocol_version >= 24)
1043: read_final_goodbye(f_in);
1044: if (pid != -1) {
1045: if (verbose > 3)
1046: rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
1047: io_flush(FULL_FLUSH);
1048: wait_process_with_flush(pid, &exit_code);
1049: }
1050: output_summary();
1051: io_flush(FULL_FLUSH);
1052: exit_cleanup(exit_code);
1053: }
1054:
1055: if (!read_batch) {
1056: if (protocol_version >= 23)
1057: io_start_multiplex_in();
1058: if (need_messages_from_generator)
1059: io_start_multiplex_out();
1060: }
1061:
1062: send_filter_list(read_batch ? -1 : f_out);
1063:
1064: if (filesfrom_fd >= 0) {
1065: io_set_filesfrom_fds(filesfrom_fd, f_out);
1066: filesfrom_fd = -1;
1067: }
1068:
1069: if (write_batch && !am_server)
1070: start_write_batch(f_in);
1071: flist = recv_file_list(f_in);
1072: if (inc_recurse && file_total == 1)
1073: recv_additional_file_list(f_in);
1074:
1075: if (flist && flist->used > 0) {
1076: local_name = get_local_name(flist, argv[0]);
1077:
1078: check_alt_basis_dirs();
1079:
1080: exit_code2 = do_recv(f_in, f_out, local_name);
1081: } else {
1082: handle_stats(-1);
1083: output_summary();
1084: }
1085:
1086: if (pid != -1) {
1087: if (verbose > 3)
1088: rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
1089: io_flush(FULL_FLUSH);
1090: wait_process_with_flush(pid, &exit_code);
1091: }
1092:
1093: return MAX(exit_code, exit_code2);
1094: }
1095:
1096: static int copy_argv(char *argv[])
1097: {
1098: int i;
1099:
1100: for (i = 0; argv[i]; i++) {
1101: if (!(argv[i] = strdup(argv[i]))) {
1102: rprintf (FERROR, "out of memory at %s(%d)\n",
1103: __FILE__, __LINE__);
1104: return RERR_MALLOC;
1105: }
1106: }
1107:
1108: return 0;
1109: }
1110:
1111:
1112: /**
1113: * Start a client for either type of remote connection. Work out
1114: * whether the arguments request a remote shell or rsyncd connection,
1115: * and call the appropriate connection function, then run_client.
1116: *
1117: * Calls either start_socket_client (for sockets) or do_cmd and
1118: * client_run (for ssh).
1119: **/
1120: static int start_client(int argc, char *argv[])
1121: {
1122: char *p, *shell_machine = NULL, *shell_user = NULL;
1123: char **remote_argv;
1124: int remote_argc;
1125: int f_in, f_out;
1126: int ret;
1127: pid_t pid;
1128:
1129: /* Don't clobber argv[] so that ps(1) can still show the right
1130: * command line. */
1131: if ((ret = copy_argv(argv)) != 0)
1132: return ret;
1133:
1134: if (!read_batch) { /* for read_batch, NO source is specified */
1135: char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1136: if (path) { /* source is remote */
1137: char *dummy_host;
1138: int dummy_port = 0;
1139: *argv = path;
1140: remote_argv = argv;
1141: remote_argc = argc;
1142: argv += argc - 1;
1143: if (argc == 1 || **argv == ':')
1144: argc = 0; /* no dest arg */
1145: else if (check_for_hostspec(*argv, &dummy_host, &dummy_port)) {
1146: rprintf(FERROR,
1147: "The source and destination cannot both be remote.\n");
1148: exit_cleanup(RERR_SYNTAX);
1149: } else {
1150: remote_argc--; /* don't count dest */
1151: argc = 1;
1152: }
1153: if (filesfrom_host && *filesfrom_host
1154: && strcmp(filesfrom_host, shell_machine) != 0) {
1155: rprintf(FERROR,
1156: "--files-from hostname is not the same as the transfer hostname\n");
1157: exit_cleanup(RERR_SYNTAX);
1158: }
1159: am_sender = 0;
1160: if (rsync_port)
1161: daemon_over_rsh = shell_cmd ? 1 : -1;
1162: } else { /* source is local, check dest arg */
1163: am_sender = 1;
1164:
1165: if (argc > 1) {
1166: p = argv[--argc];
1167: remote_argv = argv + argc;
1168: } else {
1169: static char *dotarg[1] = { "." };
1170: p = dotarg[0];
1171: remote_argv = dotarg;
1172: }
1173: remote_argc = 1;
1174:
1175: path = check_for_hostspec(p, &shell_machine, &rsync_port);
1176: if (path && filesfrom_host && *filesfrom_host
1177: && strcmp(filesfrom_host, shell_machine) != 0) {
1178: rprintf(FERROR,
1179: "--files-from hostname is not the same as the transfer hostname\n");
1180: exit_cleanup(RERR_SYNTAX);
1181: }
1182: if (!path) { /* no hostspec found, so src & dest are local */
1183: local_server = 1;
1184: if (filesfrom_host) {
1185: rprintf(FERROR,
1186: "--files-from cannot be remote when the transfer is local\n");
1187: exit_cleanup(RERR_SYNTAX);
1188: }
1189: shell_machine = NULL;
1190: } else { /* hostspec was found, so dest is remote */
1191: argv[argc] = path;
1192: if (rsync_port)
1193: daemon_over_rsh = shell_cmd ? 1 : -1;
1194: }
1195: }
1196: } else { /* read_batch */
1197: local_server = 1;
1198: if (check_for_hostspec(argv[argc-1], &shell_machine, &rsync_port)) {
1199: rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1200: exit_cleanup(RERR_SYNTAX);
1201: }
1202: remote_argv = argv += argc - 1;
1203: remote_argc = argc = 1;
1204: }
1205:
1206: if (am_sender) {
1207: char *dummy_host;
1208: int dummy_port = rsync_port;
1209: int i;
1210: /* For local source, extra source args must not have hostspec. */
1211: for (i = 1; i < argc; i++) {
1212: if (check_for_hostspec(argv[i], &dummy_host, &dummy_port)) {
1213: rprintf(FERROR, "Unexpected remote arg: %s\n", argv[i]);
1214: exit_cleanup(RERR_SYNTAX);
1215: }
1216: }
1217: } else {
1218: char *dummy_host;
1219: int dummy_port = rsync_port;
1220: int i;
1221: /* For remote source, any extra source args must have either
1222: * the same hostname or an empty hostname. */
1223: for (i = 1; i < remote_argc; i++) {
1224: char *arg = check_for_hostspec(remote_argv[i], &dummy_host, &dummy_port);
1225: if (!arg) {
1226: rprintf(FERROR, "Unexpected local arg: %s\n", remote_argv[i]);
1227: rprintf(FERROR, "If arg is a remote file/dir, prefix it with a colon (:).\n");
1228: exit_cleanup(RERR_SYNTAX);
1229: }
1230: if (*dummy_host && strcmp(dummy_host, shell_machine) != 0) {
1231: rprintf(FERROR, "All source args must come from the same machine.\n");
1232: exit_cleanup(RERR_SYNTAX);
1233: }
1234: if (rsync_port != dummy_port) {
1235: if (!rsync_port || !dummy_port)
1236: rprintf(FERROR, "All source args must use the same hostspec format.\n");
1237: else
1238: rprintf(FERROR, "All source args must use the same port number.\n");
1239: exit_cleanup(RERR_SYNTAX);
1240: }
1241: remote_argv[i] = arg;
1242: }
1243: }
1244:
1245: if (daemon_over_rsh < 0)
1246: return start_socket_client(shell_machine, remote_argc, remote_argv, argc, argv);
1247:
1248: if (password_file && !daemon_over_rsh) {
1249: rprintf(FERROR, "The --password-file option may only be "
1250: "used when accessing an rsync daemon.\n");
1251: exit_cleanup(RERR_SYNTAX);
1252: }
1253:
1254: if (connect_timeout) {
1255: rprintf(FERROR, "The --contimeout option may only be "
1256: "used when connecting to an rsync daemon.\n");
1257: exit_cleanup(RERR_SYNTAX);
1258: }
1259:
1260: if (shell_machine) {
1261: p = strrchr(shell_machine,'@');
1262: if (p) {
1263: *p = 0;
1264: shell_user = shell_machine;
1265: shell_machine = p+1;
1266: }
1267: }
1268:
1269: if (verbose > 3) {
1270: rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1271: NS(shell_cmd), NS(shell_machine), NS(shell_user),
1272: remote_argv ? NS(remote_argv[0]) : "");
1273: }
1274:
1275: pid = do_cmd(shell_cmd, shell_machine, shell_user, remote_argv, remote_argc,
1276: &f_in, &f_out);
1277:
1278: /* if we're running an rsync server on the remote host over a
1279: * remote shell command, we need to do the RSYNCD protocol first */
1280: if (daemon_over_rsh) {
1281: int tmpret;
1282: tmpret = start_inband_exchange(f_in, f_out, shell_user, remote_argc, remote_argv);
1283: if (tmpret < 0)
1284: return tmpret;
1285: }
1286:
1287: ret = client_run(f_in, f_out, pid, argc, argv);
1288:
1289: fflush(stdout);
1290: fflush(stderr);
1291:
1292: return ret;
1293: }
1294:
1295:
1296: static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1297: {
1298: exit_cleanup(RERR_SIGNAL1);
1299: }
1300:
1301: static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1302: {
1303: if (!am_server)
1304: output_summary();
1305: close_all();
1306: if (got_xfer_error)
1307: _exit(RERR_PARTIAL);
1308: _exit(0);
1309: }
1310:
1311: RETSIGTYPE remember_children(UNUSED(int val))
1312: {
1313: #ifdef WNOHANG
1314: int cnt, status;
1315: pid_t pid;
1316: /* An empty waitpid() loop was put here by Tridge and we could never
1317: * get him to explain why he put it in, so rather than taking it
1318: * out we're instead saving the child exit statuses for later use.
1319: * The waitpid() loop presumably eliminates all possibility of leaving
1320: * zombie children, maybe that's why he did it. */
1321: while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1322: /* save the child's exit status */
1323: for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1324: if (pid_stat_table[cnt].pid == 0) {
1325: pid_stat_table[cnt].pid = pid;
1326: pid_stat_table[cnt].status = status;
1327: break;
1328: }
1329: }
1330: }
1331: #endif
1332: #ifndef HAVE_SIGACTION
1333: signal(SIGCHLD, remember_children);
1334: #endif
1335: }
1336:
1337:
1338: /**
1339: * This routine catches signals and tries to send them to gdb.
1340: *
1341: * Because it's called from inside a signal handler it ought not to
1342: * use too many library routines.
1343: *
1344: * @todo Perhaps use "screen -X" instead/as well, to help people
1345: * debugging without easy access to X. Perhaps use an environment
1346: * variable, or just call a script?
1347: *
1348: * @todo The /proc/ magic probably only works on Linux (and
1349: * Solaris?) Can we be more portable?
1350: **/
1351: #ifdef MAINTAINER_MODE
1352: const char *get_panic_action(void)
1353: {
1354: const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1355:
1356: if (cmd_fmt)
1357: return cmd_fmt;
1358: else
1359: return "xterm -display :0 -T Panic -n Panic "
1360: "-e gdb /proc/%d/exe %d";
1361: }
1362:
1363:
1364: /**
1365: * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1366: *
1367: * This signal handler is only installed if we were configured with
1368: * --enable-maintainer-mode. Perhaps it should always be on and we
1369: * should just look at the environment variable, but I'm a bit leery
1370: * of a signal sending us into a busy loop.
1371: **/
1372: static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1373: {
1374: char cmd_buf[300];
1375: int ret;
1376:
1377: snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(),
1378: getpid(), getpid());
1379:
1380: /* Unless we failed to execute gdb, we allow the process to
1381: * continue. I'm not sure if that's right. */
1382: ret = system(cmd_buf);
1383: if (ret)
1384: _exit(ret);
1385: }
1386: #endif
1387:
1388:
1389: int main(int argc,char *argv[])
1390: {
1391: int ret;
1392: int orig_argc = argc;
1393: char **orig_argv = argv;
1394: #ifdef HAVE_SIGACTION
1395: # ifdef HAVE_SIGPROCMASK
1396: sigset_t sigmask;
1397:
1398: sigemptyset(&sigmask);
1399: # endif
1400: sigact.sa_flags = SA_NOCLDSTOP;
1401: #endif
1402: SIGACTMASK(SIGUSR1, sigusr1_handler);
1403: SIGACTMASK(SIGUSR2, sigusr2_handler);
1404: SIGACTMASK(SIGCHLD, remember_children);
1405: #ifdef MAINTAINER_MODE
1406: SIGACTMASK(SIGSEGV, rsync_panic_handler);
1407: SIGACTMASK(SIGFPE, rsync_panic_handler);
1408: SIGACTMASK(SIGABRT, rsync_panic_handler);
1409: SIGACTMASK(SIGBUS, rsync_panic_handler);
1410: #endif
1411:
1412: starttime = time(NULL);
1413: our_uid = MY_UID();
1414: am_root = our_uid == 0;
1415:
1416: memset(&stats, 0, sizeof(stats));
1417:
1418: if (argc < 2) {
1419: usage(FERROR);
1420: exit_cleanup(RERR_SYNTAX);
1421: }
1422:
1423: /* we set a 0 umask so that correct file permissions can be
1424: * carried across */
1425: orig_umask = umask(0);
1426:
1427: #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1428: setlocale(LC_CTYPE, "");
1429: #endif
1430:
1431: if (!parse_arguments(&argc, (const char ***) &argv)) {
1432: /* FIXME: We ought to call the same error-handling
1433: * code here, rather than relying on getopt. */
1434: option_error();
1435: exit_cleanup(RERR_SYNTAX);
1436: }
1437:
1438: SIGACTMASK(SIGINT, sig_int);
1439: SIGACTMASK(SIGHUP, sig_int);
1440: SIGACTMASK(SIGTERM, sig_int);
1441: #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1442: sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1443: #endif
1444:
1445: /* Ignore SIGPIPE; we consistently check error codes and will
1446: * see the EPIPE. */
1447: SIGACTION(SIGPIPE, SIG_IGN);
1448: #ifdef SIGXFSZ
1449: SIGACTION(SIGXFSZ, SIG_IGN);
1450: #endif
1451:
1452: /* Initialize change_dir() here because on some old systems getcwd
1453: * (implemented by forking "pwd" and reading its output) doesn't
1454: * work when there are other child processes. Also, on all systems
1455: * that implement getcwd that way "pwd" can't be found after chroot. */
1456: change_dir(NULL, CD_NORMAL);
1457:
1458: init_flist();
1459:
1460: if ((write_batch || read_batch) && !am_server) {
1461: if (write_batch)
1462: write_batch_shell_file(orig_argc, orig_argv, argc);
1463:
1464: if (read_batch && strcmp(batch_name, "-") == 0)
1465: batch_fd = STDIN_FILENO;
1466: else {
1467: batch_fd = do_open(batch_name,
1468: write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1469: : O_RDONLY, S_IRUSR | S_IWUSR);
1470: }
1471: if (batch_fd < 0) {
1472: rsyserr(FERROR, errno, "Batch file %s open error",
1473: full_fname(batch_name));
1474: exit_cleanup(RERR_FILEIO);
1475: }
1476: if (read_batch)
1477: read_stream_flags(batch_fd);
1478: else
1479: write_stream_flags(batch_fd);
1480: }
1481: if (write_batch < 0)
1482: dry_run = 1;
1483:
1484: if (am_server) {
1485: #ifdef ICONV_CONST
1486: setup_iconv();
1487: #endif
1488: } else if (am_daemon)
1489: return daemon_main();
1490:
1491: if (am_server && protect_args) {
1492: char buf[MAXPATHLEN];
1493: protect_args = 2;
1494: read_args(STDIN_FILENO, NULL, buf, sizeof buf, 1, &argv, &argc, NULL);
1495: if (!parse_arguments(&argc, (const char ***) &argv)) {
1496: option_error();
1497: exit_cleanup(RERR_SYNTAX);
1498: }
1499: }
1500:
1501: if (argc < 1) {
1502: usage(FERROR);
1503: exit_cleanup(RERR_SYNTAX);
1504: }
1505:
1506: if (am_server) {
1507: set_nonblocking(STDIN_FILENO);
1508: set_nonblocking(STDOUT_FILENO);
1509: if (am_daemon)
1510: return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1511: start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1512: }
1513:
1514: ret = start_client(argc, argv);
1515: if (ret == -1)
1516: exit_cleanup(RERR_STARTCLIENT);
1517: else
1518: exit_cleanup(ret);
1519:
1520: return ret;
1521: }
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