Annotation of embedaddon/rsync/main.c, revision 1.1.1.2
1.1 misho 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>
1.1.1.2 ! misho 7: * Copyright (C) 2003-2013 Wayne Davison
1.1 misho 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"
1.1.1.2 ! misho 24: #include "inums.h"
1.1 misho 25: #include "io.h"
26: #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H
27: #include <locale.h>
28: #endif
29:
1.1.1.2 ! misho 30: extern int force_change;
1.1 misho 31: extern int dry_run;
32: extern int list_only;
1.1.1.2 ! misho 33: extern int io_timeout;
1.1 misho 34: extern int am_root;
35: extern int am_server;
36: extern int am_sender;
37: extern int am_daemon;
38: extern int inc_recurse;
39: extern int blocking_io;
1.1.1.2 ! misho 40: extern int always_checksum;
1.1 misho 41: extern int remove_source_files;
1.1.1.2 ! misho 42: extern int output_needs_newline;
1.1 misho 43: extern int need_messages_from_generator;
44: extern int kluge_around_eof;
45: extern int got_xfer_error;
1.1.1.2 ! misho 46: extern int msgs2stderr;
1.1 misho 47: extern int module_id;
1.1.1.2 ! misho 48: extern int read_only;
1.1 misho 49: extern int copy_links;
50: extern int copy_dirlinks;
51: extern int copy_unsafe_links;
52: extern int keep_dirlinks;
53: extern int preserve_hard_links;
54: extern int protocol_version;
55: extern int file_total;
56: extern int recurse;
57: extern int xfer_dirs;
58: extern int protect_args;
59: extern int relative_paths;
60: extern int sanitize_paths;
61: extern int curr_dir_depth;
62: extern int curr_dir_len;
63: extern int module_id;
64: extern int rsync_port;
65: extern int whole_file;
66: extern int read_batch;
67: extern int write_batch;
68: extern int batch_fd;
1.1.1.2 ! misho 69: extern int sock_f_in;
! 70: extern int sock_f_out;
1.1 misho 71: extern int filesfrom_fd;
72: extern int connect_timeout;
1.1.1.2 ! misho 73: extern int send_msgs_to_gen;
1.1 misho 74: extern dev_t filesystem_dev;
75: extern pid_t cleanup_child_pid;
1.1.1.2 ! misho 76: extern size_t bwlimit_writemax;
1.1 misho 77: extern unsigned int module_dirlen;
1.1.1.2 ! misho 78: extern BOOL flist_receiving_enabled;
! 79: extern BOOL shutting_down;
! 80: extern int basis_dir_cnt;
1.1 misho 81: extern struct stats stats;
1.1.1.2 ! misho 82: extern char *stdout_format;
! 83: extern char *logfile_format;
1.1 misho 84: extern char *filesfrom_host;
85: extern char *partial_dir;
86: extern char *dest_option;
87: extern char *rsync_path;
88: extern char *shell_cmd;
89: extern char *batch_name;
90: extern char *password_file;
1.1.1.2 ! misho 91: extern char *backup_dir;
1.1 misho 92: extern char curr_dir[MAXPATHLEN];
1.1.1.2 ! misho 93: extern char backup_dir_buf[MAXPATHLEN];
! 94: extern char *basis_dir[MAX_BASIS_DIRS+1];
1.1 misho 95: extern struct file_list *first_flist;
1.1.1.2 ! misho 96: extern filter_rule_list daemon_filter_list;
1.1 misho 97:
98: uid_t our_uid;
1.1.1.2 ! misho 99: gid_t our_gid;
1.1 misho 100: int am_receiver = 0; /* Only set to 1 after the receiver/generator fork. */
101: int am_generator = 0; /* Only set to 1 after the receiver/generator fork. */
102: int local_server = 0;
103: int daemon_over_rsh = 0;
104: mode_t orig_umask = 0;
105: int batch_gen_fd = -1;
1.1.1.2 ! misho 106: int sender_keeps_checksum = 0;
1.1 misho 107:
108: /* There's probably never more than at most 2 outstanding child processes,
109: * but set it higher, just in case. */
110: #define MAXCHILDPROCS 7
111:
112: #ifdef HAVE_SIGACTION
113: # ifdef HAVE_SIGPROCMASK
114: # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
115: # else
116: # define SIGACTMASK(n,h) SIGACTION(n,h)
117: # endif
118: static struct sigaction sigact;
119: #endif
120:
121: struct pid_status {
122: pid_t pid;
123: int status;
124: } pid_stat_table[MAXCHILDPROCS];
125:
126: static time_t starttime, endtime;
127: static int64 total_read, total_written;
128:
129: static void show_malloc_stats(void);
130:
131: /* Works like waitpid(), but if we already harvested the child pid in our
132: * remember_children(), we succeed instead of returning an error. */
133: pid_t wait_process(pid_t pid, int *status_ptr, int flags)
134: {
135: pid_t waited_pid;
1.1.1.2 ! misho 136:
1.1 misho 137: do {
138: waited_pid = waitpid(pid, status_ptr, flags);
139: } while (waited_pid == -1 && errno == EINTR);
140:
141: if (waited_pid == -1 && errno == ECHILD) {
142: /* Status of requested child no longer available: check to
143: * see if it was processed by remember_children(). */
144: int cnt;
145: for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
146: if (pid == pid_stat_table[cnt].pid) {
147: *status_ptr = pid_stat_table[cnt].status;
148: pid_stat_table[cnt].pid = 0;
149: return pid;
150: }
151: }
152: }
153:
154: return waited_pid;
155: }
156:
157: /* Wait for a process to exit, calling io_flush while waiting. */
158: static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
159: {
160: pid_t waited_pid;
161: int status;
162:
163: while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
164: msleep(20);
165: io_flush(FULL_FLUSH);
166: }
167:
168: /* TODO: If the child exited on a signal, then log an
169: * appropriate error message. Perhaps we should also accept a
170: * message describing the purpose of the child. Also indicate
171: * this to the caller so that they know something went wrong. */
172: if (waited_pid < 0) {
173: rsyserr(FERROR, errno, "waitpid");
174: *exit_code_ptr = RERR_WAITCHILD;
175: } else if (!WIFEXITED(status)) {
176: #ifdef WCOREDUMP
177: if (WCOREDUMP(status))
178: *exit_code_ptr = RERR_CRASHED;
179: else
180: #endif
181: if (WIFSIGNALED(status))
182: *exit_code_ptr = RERR_TERMINATED;
183: else
184: *exit_code_ptr = RERR_WAITCHILD;
185: } else
186: *exit_code_ptr = WEXITSTATUS(status);
187: }
188:
1.1.1.2 ! misho 189: void write_del_stats(int f)
! 190: {
! 191: if (read_batch)
! 192: write_int(f, NDX_DEL_STATS);
! 193: else
! 194: write_ndx(f, NDX_DEL_STATS);
! 195: write_varint(f, stats.deleted_files - stats.deleted_dirs
! 196: - stats.deleted_symlinks - stats.deleted_devices
! 197: - stats.deleted_specials);
! 198: write_varint(f, stats.deleted_dirs);
! 199: write_varint(f, stats.deleted_symlinks);
! 200: write_varint(f, stats.deleted_devices);
! 201: write_varint(f, stats.deleted_specials);
! 202: }
! 203:
! 204: void read_del_stats(int f)
! 205: {
! 206: stats.deleted_files = read_varint(f);
! 207: stats.deleted_files += stats.deleted_dirs = read_varint(f);
! 208: stats.deleted_files += stats.deleted_symlinks = read_varint(f);
! 209: stats.deleted_files += stats.deleted_devices = read_varint(f);
! 210: stats.deleted_files += stats.deleted_specials = read_varint(f);
! 211: }
! 212:
1.1 misho 213: /* This function gets called from all 3 processes. We want the client side
214: * to actually output the text, but the sender is the only process that has
215: * all the stats we need. So, if we're a client sender, we do the report.
216: * If we're a server sender, we write the stats on the supplied fd. If
217: * we're the client receiver we read the stats from the supplied fd and do
218: * the report. All processes might also generate a set of debug stats, if
219: * the verbose level is high enough (this is the only thing that the
220: * generator process and the server receiver ever do here). */
221: static void handle_stats(int f)
222: {
223: endtime = time(NULL);
224:
225: /* Cache two stats because the read/write code can change it. */
226: total_read = stats.total_read;
227: total_written = stats.total_written;
228:
1.1.1.2 ! misho 229: if (INFO_GTE(STATS, 3)) {
1.1 misho 230: /* These come out from every process */
231: show_malloc_stats();
232: show_flist_stats();
233: }
234:
235: if (am_generator)
236: return;
237:
238: if (am_daemon) {
239: if (f == -1 || !am_sender)
240: return;
241: }
242:
243: if (am_server) {
244: if (am_sender) {
245: write_varlong30(f, total_read, 3);
246: write_varlong30(f, total_written, 3);
247: write_varlong30(f, stats.total_size, 3);
248: if (protocol_version >= 29) {
249: write_varlong30(f, stats.flist_buildtime, 3);
250: write_varlong30(f, stats.flist_xfertime, 3);
251: }
252: }
253: return;
254: }
255:
256: /* this is the client */
257:
258: if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
259: ;
260: else if (!am_sender) {
261: /* Read the first two in opposite order because the meaning of
262: * read/write swaps when switching from sender to receiver. */
263: total_written = read_varlong30(f, 3);
264: total_read = read_varlong30(f, 3);
265: stats.total_size = read_varlong30(f, 3);
266: if (protocol_version >= 29) {
267: stats.flist_buildtime = read_varlong30(f, 3);
268: stats.flist_xfertime = read_varlong30(f, 3);
269: }
270: } else if (write_batch) {
271: /* The --read-batch process is going to be a client
272: * receiver, so we need to give it the stats. */
273: write_varlong30(batch_fd, total_read, 3);
274: write_varlong30(batch_fd, total_written, 3);
275: write_varlong30(batch_fd, stats.total_size, 3);
276: if (protocol_version >= 29) {
277: write_varlong30(batch_fd, stats.flist_buildtime, 3);
278: write_varlong30(batch_fd, stats.flist_xfertime, 3);
279: }
280: }
281: }
282:
1.1.1.2 ! misho 283: static void output_itemized_counts(const char *prefix, int *counts)
! 284: {
! 285: static char *labels[] = { "reg", "dir", "link", "dev", "special" };
! 286: char buf[1024], *pre = " (";
! 287: int j, len = 0;
! 288: int total = counts[0];
! 289: if (total) {
! 290: counts[0] -= counts[1] + counts[2] + counts[3] + counts[4];
! 291: for (j = 0; j < 5; j++) {
! 292: if (counts[j]) {
! 293: len += snprintf(buf+len, sizeof buf - len - 2,
! 294: "%s%s: %s",
! 295: pre, labels[j], comma_num(counts[j]));
! 296: pre = ", ";
! 297: }
! 298: }
! 299: buf[len++] = ')';
! 300: }
! 301: buf[len] = '\0';
! 302: rprintf(FINFO, "%s: %s%s\n", prefix, comma_num(total), buf);
! 303: }
! 304:
1.1 misho 305: static void output_summary(void)
306: {
1.1.1.2 ! misho 307: if (INFO_GTE(STATS, 2)) {
1.1 misho 308: rprintf(FCLIENT, "\n");
1.1.1.2 ! misho 309: output_itemized_counts("Number of files", &stats.num_files);
! 310: if (protocol_version >= 29)
! 311: output_itemized_counts("Number of created files", &stats.created_files);
! 312: if (protocol_version >= 31)
! 313: output_itemized_counts("Number of deleted files", &stats.deleted_files);
! 314: rprintf(FINFO,"Number of regular files transferred: %s\n",
! 315: comma_num(stats.xferred_files));
1.1 misho 316: rprintf(FINFO,"Total file size: %s bytes\n",
317: human_num(stats.total_size));
318: rprintf(FINFO,"Total transferred file size: %s bytes\n",
319: human_num(stats.total_transferred_size));
320: rprintf(FINFO,"Literal data: %s bytes\n",
321: human_num(stats.literal_data));
322: rprintf(FINFO,"Matched data: %s bytes\n",
323: human_num(stats.matched_data));
324: rprintf(FINFO,"File list size: %s\n",
325: human_num(stats.flist_size));
326: if (stats.flist_buildtime) {
327: rprintf(FINFO,
1.1.1.2 ! misho 328: "File list generation time: %s seconds\n",
! 329: comma_dnum((double)stats.flist_buildtime / 1000, 3));
1.1 misho 330: rprintf(FINFO,
1.1.1.2 ! misho 331: "File list transfer time: %s seconds\n",
! 332: comma_dnum((double)stats.flist_xfertime / 1000, 3));
1.1 misho 333: }
334: rprintf(FINFO,"Total bytes sent: %s\n",
335: human_num(total_written));
336: rprintf(FINFO,"Total bytes received: %s\n",
337: human_num(total_read));
338: }
339:
1.1.1.2 ! misho 340: if (INFO_GTE(STATS, 1)) {
1.1 misho 341: rprintf(FCLIENT, "\n");
342: rprintf(FINFO,
343: "sent %s bytes received %s bytes %s bytes/sec\n",
344: human_num(total_written), human_num(total_read),
345: human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2));
1.1.1.2 ! misho 346: rprintf(FINFO, "total size is %s speedup is %s%s\n",
1.1 misho 347: human_num(stats.total_size),
1.1.1.2 ! misho 348: comma_dnum((double)stats.total_size / (total_written+total_read), 2),
1.1 misho 349: write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : "");
350: }
351:
352: fflush(stdout);
353: fflush(stderr);
354: }
355:
356:
357: /**
358: * If our C library can get malloc statistics, then show them to FINFO
359: **/
360: static void show_malloc_stats(void)
361: {
362: #ifdef HAVE_MALLINFO
363: struct mallinfo mi;
364:
365: mi = mallinfo();
366:
367: rprintf(FCLIENT, "\n");
368: rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
1.1.1.2 ! misho 369: (int)getpid(), am_server ? "server " : "",
1.1 misho 370: am_daemon ? "daemon " : "", who_am_i());
371: rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n",
372: (long)mi.arena);
373: rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n",
374: (long)mi.ordblks);
375: rprintf(FINFO, " smblks: %10ld\n",
376: (long)mi.smblks);
377: rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n",
378: (long)mi.hblks);
379: rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n",
380: (long)mi.hblkhd);
381: rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n",
382: (long)mi.arena + mi.hblkhd);
383: rprintf(FINFO, " usmblks: %10ld\n",
384: (long)mi.usmblks);
385: rprintf(FINFO, " fsmblks: %10ld\n",
386: (long)mi.fsmblks);
387: rprintf(FINFO, " uordblks: %10ld (bytes used)\n",
388: (long)mi.uordblks);
389: rprintf(FINFO, " fordblks: %10ld (bytes free)\n",
390: (long)mi.fordblks);
391: rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n",
392: (long)mi.keepcost);
393: #endif /* HAVE_MALLINFO */
394: }
395:
396:
397: /* Start the remote shell. cmd may be NULL to use the default. */
398: static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc,
399: int *f_in_p, int *f_out_p)
400: {
401: int i, argc = 0;
1.1.1.2 ! misho 402: char *args[MAX_ARGS], *need_to_free = NULL;
1.1 misho 403: pid_t pid;
404: int dash_l_set = 0;
405:
406: if (!read_batch && !local_server) {
407: char *t, *f, in_quote = '\0';
408: char *rsh_env = getenv(RSYNC_RSH_ENV);
409: if (!cmd)
410: cmd = rsh_env;
411: if (!cmd)
412: cmd = RSYNC_RSH;
1.1.1.2 ! misho 413: cmd = need_to_free = strdup(cmd);
1.1 misho 414: if (!cmd)
415: goto oom;
416:
417: for (t = f = cmd; *f; f++) {
418: if (*f == ' ')
419: continue;
420: /* Comparison leaves rooms for server_options(). */
421: if (argc >= MAX_ARGS - MAX_SERVER_ARGS)
422: goto arg_overflow;
423: args[argc++] = t;
424: while (*f != ' ' || in_quote) {
425: if (!*f) {
426: if (in_quote) {
427: rprintf(FERROR,
428: "Missing trailing-%c in remote-shell command.\n",
429: in_quote);
430: exit_cleanup(RERR_SYNTAX);
431: }
432: f--;
433: break;
434: }
435: if (*f == '\'' || *f == '"') {
436: if (!in_quote) {
437: in_quote = *f++;
438: continue;
439: }
440: if (*f == in_quote && *++f != in_quote) {
441: in_quote = '\0';
442: continue;
443: }
444: }
445: *t++ = *f++;
446: }
447: *t++ = '\0';
448: }
449:
450: /* check to see if we've already been given '-l user' in
451: * the remote-shell command */
452: for (i = 0; i < argc-1; i++) {
453: if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
454: dash_l_set = 1;
455: }
456:
457: #ifdef HAVE_REMSH
458: /* remsh (on HPUX) takes the arguments the other way around */
459: args[argc++] = machine;
460: if (user && !(daemon_over_rsh && dash_l_set)) {
461: args[argc++] = "-l";
462: args[argc++] = user;
463: }
464: #else
465: if (user && !(daemon_over_rsh && dash_l_set)) {
466: args[argc++] = "-l";
467: args[argc++] = user;
468: }
469: args[argc++] = machine;
470: #endif
471:
472: args[argc++] = rsync_path;
473:
474: if (blocking_io < 0) {
475: char *cp;
476: if ((cp = strrchr(cmd, '/')) != NULL)
477: cp++;
478: else
479: cp = cmd;
480: if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
481: blocking_io = 1;
482: }
483:
484: server_options(args,&argc);
485:
486: if (argc >= MAX_ARGS - 2)
487: goto arg_overflow;
488: }
489:
490: args[argc++] = ".";
491:
492: if (!daemon_over_rsh) {
493: while (remote_argc > 0) {
494: if (argc >= MAX_ARGS - 1) {
495: arg_overflow:
496: rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
497: exit_cleanup(RERR_SYNTAX);
498: }
499: if (**remote_argv == '-') {
500: if (asprintf(args + argc++, "./%s", *remote_argv++) < 0)
501: out_of_memory("do_cmd");
502: } else
503: args[argc++] = *remote_argv++;
504: remote_argc--;
505: }
506: }
507:
508: args[argc] = NULL;
509:
1.1.1.2 ! misho 510: if (DEBUG_GTE(CMD, 2)) {
1.1 misho 511: for (i = 0; i < argc; i++)
512: rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]);
513: rprintf(FCLIENT, "\n");
514: }
515:
516: if (read_batch) {
517: int from_gen_pipe[2];
518: set_allow_inc_recurse();
519: if (fd_pair(from_gen_pipe) < 0) {
520: rsyserr(FERROR, errno, "pipe");
521: exit_cleanup(RERR_IPC);
522: }
523: batch_gen_fd = from_gen_pipe[0];
524: *f_out_p = from_gen_pipe[1];
525: *f_in_p = batch_fd;
526: pid = (pid_t)-1; /* no child pid */
527: #ifdef ICONV_CONST
528: setup_iconv();
529: #endif
530: } else if (local_server) {
531: /* If the user didn't request --[no-]whole-file, force
532: * it on, but only if we're not batch processing. */
533: if (whole_file < 0 && !write_batch)
534: whole_file = 1;
535: set_allow_inc_recurse();
536: pid = local_child(argc, args, f_in_p, f_out_p, child_main);
537: #ifdef ICONV_CONST
538: setup_iconv();
539: #endif
540: } else {
541: pid = piped_child(args, f_in_p, f_out_p);
542: #ifdef ICONV_CONST
543: setup_iconv();
544: #endif
545: if (protect_args && !daemon_over_rsh)
546: send_protected_args(*f_out_p, args);
547: }
548:
1.1.1.2 ! misho 549: if (need_to_free)
! 550: free(need_to_free);
! 551:
1.1 misho 552: return pid;
553:
554: oom:
555: out_of_memory("do_cmd");
556: return 0; /* not reached */
557: }
558:
559: /* The receiving side operates in one of two modes:
560: *
561: * 1. it receives any number of files into a destination directory,
562: * placing them according to their names in the file-list.
563: *
564: * 2. it receives a single file and saves it using the name in the
565: * destination path instead of its file-list name. This requires a
566: * "local name" for writing out the destination file.
567: *
568: * So, our task is to figure out what mode/local-name we need.
569: * For mode 1, we change into the destination directory and return NULL.
570: * For mode 2, we change into the directory containing the destination
571: * file (if we aren't already there) and return the local-name. */
572: static char *get_local_name(struct file_list *flist, char *dest_path)
573: {
574: STRUCT_STAT st;
575: int statret;
576: char *cp;
577:
1.1.1.2 ! misho 578: if (DEBUG_GTE(RECV, 1)) {
1.1 misho 579: rprintf(FINFO, "get_local_name count=%d %s\n",
580: file_total, NS(dest_path));
581: }
582:
583: if (!dest_path || list_only)
584: return NULL;
585:
586: /* Treat an empty string as a copy into the current directory. */
587: if (!*dest_path)
588: dest_path = ".";
589:
590: if (daemon_filter_list.head) {
591: char *slash = strrchr(dest_path, '/');
592: if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0')))
593: *slash = '\0';
594: else
595: slash = NULL;
596: if ((*dest_path != '.' || dest_path[1] != '\0')
597: && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0
598: || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) {
599: rprintf(FERROR, "ERROR: daemon has excluded destination \"%s\"\n",
600: dest_path);
601: exit_cleanup(RERR_FILESELECT);
602: }
603: if (slash)
604: *slash = '/';
605: }
606:
607: /* See what currently exists at the destination. */
608: if ((statret = do_stat(dest_path, &st)) == 0) {
609: /* If the destination is a dir, enter it and use mode 1. */
610: if (S_ISDIR(st.st_mode)) {
611: if (!change_dir(dest_path, CD_NORMAL)) {
612: rsyserr(FERROR, errno, "change_dir#1 %s failed",
613: full_fname(dest_path));
614: exit_cleanup(RERR_FILESELECT);
615: }
616: filesystem_dev = st.st_dev; /* ensures --force works right w/-x */
617: return NULL;
618: }
619: if (file_total > 1) {
620: rprintf(FERROR,
621: "ERROR: destination must be a directory when"
622: " copying more than 1 file\n");
623: exit_cleanup(RERR_FILESELECT);
624: }
625: if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) {
626: rprintf(FERROR,
627: "ERROR: cannot overwrite non-directory"
628: " with a directory\n");
629: exit_cleanup(RERR_FILESELECT);
630: }
631: } else if (errno != ENOENT) {
632: /* If we don't know what's at the destination, fail. */
633: rsyserr(FERROR, errno, "ERROR: cannot stat destination %s",
634: full_fname(dest_path));
635: exit_cleanup(RERR_FILESELECT);
636: }
637:
638: cp = strrchr(dest_path, '/');
639:
640: /* If we need a destination directory because the transfer is not
641: * of a single non-directory or the user has requested one via a
642: * destination path ending in a slash, create one and use mode 1. */
643: if (file_total > 1 || (cp && !cp[1])) {
644: /* Lop off the final slash (if any). */
645: if (cp && !cp[1])
646: *cp = '\0';
647:
648: if (statret == 0) {
649: rprintf(FERROR,
650: "ERROR: destination path is not a directory\n");
651: exit_cleanup(RERR_SYNTAX);
652: }
653:
1.1.1.2 ! misho 654: if (do_mkdir(dest_path, ACCESSPERMS) != 0) {
1.1 misho 655: rsyserr(FERROR, errno, "mkdir %s failed",
656: full_fname(dest_path));
657: exit_cleanup(RERR_FILEIO);
658: }
659:
660: if (flist->high >= flist->low
661: && strcmp(flist->files[flist->low]->basename, ".") == 0)
662: flist->files[0]->flags |= FLAG_DIR_CREATED;
663:
1.1.1.2 ! misho 664: if (INFO_GTE(NAME, 1))
1.1 misho 665: rprintf(FINFO, "created directory %s\n", dest_path);
666:
667: if (dry_run) {
668: /* Indicate that dest dir doesn't really exist. */
669: dry_run++;
670: }
671:
672: if (!change_dir(dest_path, dry_run > 1 ? CD_SKIP_CHDIR : CD_NORMAL)) {
673: rsyserr(FERROR, errno, "change_dir#2 %s failed",
674: full_fname(dest_path));
675: exit_cleanup(RERR_FILESELECT);
676: }
677:
678: return NULL;
679: }
680:
681: /* Otherwise, we are writing a single file, possibly on top of an
682: * existing non-directory. Change to the item's parent directory
683: * (if it has a path component), return the basename of the
684: * destination file as the local name, and use mode 2. */
685: if (!cp)
686: return dest_path;
687:
688: if (cp == dest_path)
689: dest_path = "/";
690:
691: *cp = '\0';
692: if (!change_dir(dest_path, CD_NORMAL)) {
693: rsyserr(FERROR, errno, "change_dir#3 %s failed",
694: full_fname(dest_path));
695: exit_cleanup(RERR_FILESELECT);
696: }
697: *cp = '/';
698:
699: return cp + 1;
700: }
701:
702: /* This function checks on our alternate-basis directories. If we're in
703: * dry-run mode and the destination dir does not yet exist, we'll try to
704: * tweak any dest-relative paths to make them work for a dry-run (the
705: * destination dir must be in curr_dir[] when this function is called).
706: * We also warn about any arg that is non-existent or not a directory. */
707: static void check_alt_basis_dirs(void)
708: {
709: STRUCT_STAT st;
1.1.1.2 ! misho 710: char *slash = strrchr(curr_dir, '/');
! 711: int j;
1.1 misho 712:
1.1.1.2 ! misho 713: for (j = 0; j < basis_dir_cnt; j++) {
! 714: char *bdir = basis_dir[j];
! 715: int bd_len = strlen(bdir);
! 716: if (bd_len > 1 && bdir[bd_len-1] == '/')
! 717: bdir[--bd_len] = '\0';
! 718: if (dry_run > 1 && *bdir != '/') {
! 719: int len = curr_dir_len + 1 + bd_len + 1;
1.1 misho 720: char *new = new_array(char, len);
721: if (!new)
722: out_of_memory("check_alt_basis_dirs");
1.1.1.2 ! misho 723: if (slash && strncmp(bdir, "../", 3) == 0) {
1.1 misho 724: /* We want to remove only one leading "../" prefix for
725: * the directory we couldn't create in dry-run mode:
726: * this ensures that any other ".." references get
727: * evaluated the same as they would for a live copy. */
728: *slash = '\0';
1.1.1.2 ! misho 729: pathjoin(new, len, curr_dir, bdir + 3);
1.1 misho 730: *slash = '/';
731: } else
1.1.1.2 ! misho 732: pathjoin(new, len, curr_dir, bdir);
! 733: basis_dir[j] = bdir = new;
1.1 misho 734: }
1.1.1.2 ! misho 735: if (do_stat(bdir, &st) < 0)
! 736: rprintf(FWARNING, "%s arg does not exist: %s\n", dest_option, bdir);
! 737: else if (!S_ISDIR(st.st_mode))
! 738: rprintf(FWARNING, "%s arg is not a dir: %s\n", dest_option, bdir);
1.1 misho 739: }
740: }
741:
742: /* This is only called by the sender. */
1.1.1.2 ! misho 743: static void read_final_goodbye(int f_in, int f_out)
1.1 misho 744: {
745: int i, iflags, xlen;
746: uchar fnamecmp_type;
747: char xname[MAXPATHLEN];
748:
1.1.1.2 ! misho 749: shutting_down = True;
! 750:
1.1 misho 751: if (protocol_version < 29)
752: i = read_int(f_in);
753: else {
1.1.1.2 ! misho 754: i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
! 755: if (protocol_version >= 31 && i == NDX_DONE) {
! 756: if (am_sender)
! 757: write_ndx(f_out, NDX_DONE);
! 758: else {
! 759: if (batch_gen_fd >= 0) {
! 760: while (read_int(batch_gen_fd) != NDX_DEL_STATS) {}
! 761: read_del_stats(batch_gen_fd);
! 762: }
! 763: write_int(f_out, NDX_DONE);
! 764: }
! 765: i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen);
! 766: }
1.1 misho 767: }
768:
769: if (i != NDX_DONE) {
770: rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
771: i, who_am_i());
772: exit_cleanup(RERR_PROTOCOL);
773: }
774: }
775:
776: static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
777: {
778: struct file_list *flist;
779: char *dir = argv[0];
780:
1.1.1.2 ! misho 781: if (DEBUG_GTE(SEND, 1))
! 782: rprintf(FINFO, "server_sender starting pid=%d\n", (int)getpid());
1.1 misho 783:
784: if (am_daemon && lp_write_only(module_id)) {
785: rprintf(FERROR, "ERROR: module is write only\n");
786: exit_cleanup(RERR_SYNTAX);
787: return;
788: }
1.1.1.2 ! misho 789: if (am_daemon && read_only && remove_source_files) {
1.1 misho 790: rprintf(FERROR,
791: "ERROR: --remove-%s-files cannot be used with a read-only module\n",
792: remove_source_files == 1 ? "source" : "sent");
793: exit_cleanup(RERR_SYNTAX);
794: return;
795: }
796:
797: if (!relative_paths) {
798: if (!change_dir(dir, CD_NORMAL)) {
799: rsyserr(FERROR, errno, "change_dir#3 %s failed",
800: full_fname(dir));
801: exit_cleanup(RERR_FILESELECT);
802: }
803: }
804: argc--;
805: argv++;
806:
807: if (argc == 0 && (recurse || xfer_dirs || list_only)) {
808: argc = 1;
809: argv--;
810: argv[0] = ".";
811: }
812:
813: flist = send_file_list(f_out,argc,argv);
1.1.1.2 ! misho 814: if (!flist || flist->used == 0) {
! 815: /* Make sure input buffering is off so we can't hang in noop_io_until_death(). */
! 816: io_end_buffering_in(0);
! 817: /* TODO: we should really exit in a more controlled manner. */
1.1 misho 818: exit_cleanup(0);
1.1.1.2 ! misho 819: }
1.1 misho 820:
821: io_start_buffering_in(f_in);
822:
823: send_files(f_in, f_out);
824: io_flush(FULL_FLUSH);
825: handle_stats(f_out);
826: if (protocol_version >= 24)
1.1.1.2 ! misho 827: read_final_goodbye(f_in, f_out);
1.1 misho 828: io_flush(FULL_FLUSH);
829: exit_cleanup(0);
830: }
831:
832:
833: static int do_recv(int f_in, int f_out, char *local_name)
834: {
835: int pid;
836: int exit_code = 0;
837: int error_pipe[2];
838:
839: /* The receiving side mustn't obey this, or an existing symlink that
840: * points to an identical file won't be replaced by the referent. */
841: copy_links = copy_dirlinks = copy_unsafe_links = 0;
842:
843: #ifdef SUPPORT_HARD_LINKS
844: if (preserve_hard_links && !inc_recurse)
845: match_hard_links(first_flist);
846: #endif
847:
848: if (fd_pair(error_pipe) < 0) {
849: rsyserr(FERROR, errno, "pipe failed in do_recv");
850: exit_cleanup(RERR_IPC);
851: }
852:
1.1.1.2 ! misho 853: if (backup_dir) {
! 854: int ret = make_path(backup_dir_buf, MKP_DROP_NAME); /* drops trailing slash */
! 855: if (ret < 0)
! 856: exit_cleanup(RERR_SYNTAX);
! 857: if (ret)
! 858: rprintf(FINFO, "Created backup_dir %s\n", backup_dir_buf);
! 859: else if (INFO_GTE(BACKUP, 1))
! 860: rprintf(FINFO, "backup_dir is %s\n", backup_dir_buf);
! 861: }
! 862:
! 863: io_flush(FULL_FLUSH);
1.1 misho 864:
865: if ((pid = do_fork()) == -1) {
866: rsyserr(FERROR, errno, "fork failed in do_recv");
867: exit_cleanup(RERR_IPC);
868: }
869:
870: if (pid == 0) {
871: am_receiver = 1;
1.1.1.2 ! misho 872: send_msgs_to_gen = am_server;
1.1 misho 873:
874: close(error_pipe[0]);
1.1.1.2 ! misho 875:
! 876: /* We can't let two processes write to the socket at one time. */
! 877: io_end_multiplex_out(MPLX_SWITCHING);
1.1 misho 878: if (f_in != f_out)
879: close(f_out);
1.1.1.2 ! misho 880: sock_f_out = -1;
! 881: f_out = error_pipe[1];
1.1 misho 882:
1.1.1.2 ! misho 883: bwlimit_writemax = 0; /* receiver doesn't need to do this */
1.1 misho 884:
1.1.1.2 ! misho 885: if (read_batch)
! 886: io_start_buffering_in(f_in);
! 887: io_start_multiplex_out(f_out);
1.1 misho 888:
1.1.1.2 ! misho 889: recv_files(f_in, f_out, local_name);
1.1 misho 890: io_flush(FULL_FLUSH);
891: handle_stats(f_in);
892:
1.1.1.2 ! misho 893: if (output_needs_newline) {
! 894: fputc('\n', stdout);
! 895: output_needs_newline = 0;
! 896: }
! 897:
! 898: write_int(f_out, NDX_DONE);
! 899: send_msg(MSG_STATS, (char*)&stats.total_read, sizeof stats.total_read, 0);
1.1 misho 900: io_flush(FULL_FLUSH);
901:
902: /* Handle any keep-alive packets from the post-processing work
903: * that the generator does. */
904: if (protocol_version >= 29) {
905: kluge_around_eof = -1;
906:
907: /* This should only get stopped via a USR2 signal. */
1.1.1.2 ! misho 908: read_final_goodbye(f_in, f_out);
1.1 misho 909:
910: rprintf(FERROR, "Invalid packet at end of run [%s]\n",
911: who_am_i());
912: exit_cleanup(RERR_PROTOCOL);
913: }
914:
915: /* Finally, we go to sleep until our parent kills us with a
916: * USR2 signal. We sleep for a short time, as on some OSes
917: * a signal won't interrupt a sleep! */
918: while (1)
919: msleep(20);
920: }
921:
922: am_generator = 1;
1.1.1.2 ! misho 923: flist_receiving_enabled = True;
1.1 misho 924:
1.1.1.2 ! misho 925: io_end_multiplex_in(MPLX_SWITCHING);
1.1 misho 926: if (write_batch && !am_server)
927: stop_write_batch();
928:
929: close(error_pipe[1]);
930: if (f_in != f_out)
931: close(f_in);
1.1.1.2 ! misho 932: sock_f_in = -1;
! 933: f_in = error_pipe[0];
1.1 misho 934:
935: io_start_buffering_out(f_out);
1.1.1.2 ! misho 936: io_start_multiplex_in(f_in);
1.1 misho 937:
938: #ifdef SUPPORT_HARD_LINKS
939: if (preserve_hard_links && inc_recurse) {
940: struct file_list *flist;
941: for (flist = first_flist; flist; flist = flist->next)
942: match_hard_links(flist);
943: }
944: #endif
945:
946: generate_files(f_out, local_name);
947:
948: handle_stats(-1);
949: io_flush(FULL_FLUSH);
1.1.1.2 ! misho 950: shutting_down = True;
1.1 misho 951: if (protocol_version >= 24) {
952: /* send a final goodbye message */
953: write_ndx(f_out, NDX_DONE);
954: }
955: io_flush(FULL_FLUSH);
956:
957: kill(pid, SIGUSR2);
958: wait_process_with_flush(pid, &exit_code);
959: return exit_code;
960: }
961:
962: static void do_server_recv(int f_in, int f_out, int argc, char *argv[])
963: {
964: int exit_code;
965: struct file_list *flist;
966: char *local_name = NULL;
1.1.1.2 ! misho 967: int negated_levels;
1.1 misho 968:
1.1.1.2 ! misho 969: if (filesfrom_fd >= 0 && !msgs2stderr && protocol_version < 31) {
1.1 misho 970: /* We can't mix messages with files-from data on the socket,
1.1.1.2 ! misho 971: * so temporarily turn off info/debug messages. */
! 972: negate_output_levels();
! 973: negated_levels = 1;
! 974: } else
! 975: negated_levels = 0;
1.1 misho 976:
1.1.1.2 ! misho 977: if (DEBUG_GTE(RECV, 1))
! 978: rprintf(FINFO, "server_recv(%d) starting pid=%d\n", argc, (int)getpid());
1.1 misho 979:
1.1.1.2 ! misho 980: if (am_daemon && read_only) {
1.1 misho 981: rprintf(FERROR,"ERROR: module is read only\n");
982: exit_cleanup(RERR_SYNTAX);
983: return;
984: }
985:
986: if (argc > 0) {
987: char *dir = argv[0];
988: argc--;
989: argv++;
990: if (!am_daemon && !change_dir(dir, CD_NORMAL)) {
991: rsyserr(FERROR, errno, "change_dir#4 %s failed",
992: full_fname(dir));
993: exit_cleanup(RERR_FILESELECT);
994: }
995: }
996:
997: if (protocol_version >= 30)
1.1.1.2 ! misho 998: io_start_multiplex_in(f_in);
1.1 misho 999: else
1000: io_start_buffering_in(f_in);
1001: recv_filter_list(f_in);
1002:
1003: if (filesfrom_fd >= 0) {
1004: /* We need to send the files-from names to the sender at the
1005: * same time that we receive the file-list from them, so we
1006: * need the IO routines to automatically write out the names
1007: * onto our f_out socket as we read the file-list. This
1008: * avoids both deadlock and extra delays/buffers. */
1.1.1.2 ! misho 1009: start_filesfrom_forwarding(filesfrom_fd);
1.1 misho 1010: filesfrom_fd = -1;
1011: }
1012:
1013: flist = recv_file_list(f_in);
1014: if (!flist) {
1015: rprintf(FERROR,"server_recv: recv_file_list error\n");
1016: exit_cleanup(RERR_FILESELECT);
1017: }
1018: if (inc_recurse && file_total == 1)
1019: recv_additional_file_list(f_in);
1.1.1.2 ! misho 1020:
! 1021: if (negated_levels)
! 1022: negate_output_levels();
1.1 misho 1023:
1024: if (argc > 0)
1025: local_name = get_local_name(flist,argv[0]);
1026:
1027: /* Now that we know what our destination directory turned out to be,
1028: * we can sanitize the --link-/copy-/compare-dest args correctly. */
1029: if (sanitize_paths) {
1030: char **dir_p;
1031: for (dir_p = basis_dir; *dir_p; dir_p++)
1032: *dir_p = sanitize_path(NULL, *dir_p, NULL, curr_dir_depth, SP_DEFAULT);
1033: if (partial_dir)
1034: partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, SP_DEFAULT);
1035: }
1036: check_alt_basis_dirs();
1037:
1038: if (daemon_filter_list.head) {
1039: char **dir_p;
1.1.1.2 ! misho 1040: filter_rule_list *elp = &daemon_filter_list;
1.1 misho 1041:
1042: for (dir_p = basis_dir; *dir_p; dir_p++) {
1043: char *dir = *dir_p;
1044: if (*dir == '/')
1045: dir += module_dirlen;
1046: if (check_filter(elp, FLOG, dir, 1) < 0)
1047: goto options_rejected;
1048: }
1049: if (partial_dir && *partial_dir == '/'
1050: && check_filter(elp, FLOG, partial_dir + module_dirlen, 1) < 0) {
1051: options_rejected:
1052: rprintf(FERROR,
1053: "Your options have been rejected by the server.\n");
1054: exit_cleanup(RERR_SYNTAX);
1055: }
1056: }
1057:
1058: exit_code = do_recv(f_in, f_out, local_name);
1059: exit_cleanup(exit_code);
1060: }
1061:
1062:
1063: int child_main(int argc, char *argv[])
1064: {
1065: start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1066: return 0;
1067: }
1068:
1069:
1070: void start_server(int f_in, int f_out, int argc, char *argv[])
1071: {
1072: set_nonblocking(f_in);
1073: set_nonblocking(f_out);
1074:
1075: io_set_sock_fds(f_in, f_out);
1076: setup_protocol(f_out, f_in);
1077:
1078: if (protocol_version >= 23)
1.1.1.2 ! misho 1079: io_start_multiplex_out(f_out);
! 1080: if (am_daemon && io_timeout && protocol_version >= 31)
! 1081: send_msg_int(MSG_IO_TIMEOUT, io_timeout);
1.1 misho 1082:
1083: if (am_sender) {
1084: keep_dirlinks = 0; /* Must be disabled on the sender. */
1085: if (need_messages_from_generator)
1.1.1.2 ! misho 1086: io_start_multiplex_in(f_in);
! 1087: else
! 1088: io_start_buffering_in(f_in);
1.1 misho 1089: recv_filter_list(f_in);
1090: do_server_sender(f_in, f_out, argc, argv);
1091: } else
1092: do_server_recv(f_in, f_out, argc, argv);
1093: exit_cleanup(0);
1094: }
1095:
1.1.1.2 ! misho 1096: /* This is called once the connection has been negotiated. It is used
! 1097: * for rsyncd, remote-shell, and local connections. */
1.1 misho 1098: int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
1099: {
1100: struct file_list *flist = NULL;
1101: int exit_code = 0, exit_code2 = 0;
1102: char *local_name = NULL;
1103:
1104: cleanup_child_pid = pid;
1105: if (!read_batch) {
1106: set_nonblocking(f_in);
1107: set_nonblocking(f_out);
1108: }
1109:
1110: io_set_sock_fds(f_in, f_out);
1111: setup_protocol(f_out,f_in);
1112:
1113: /* We set our stderr file handle to blocking because ssh might have
1114: * set it to non-blocking. This can be particularly troublesome if
1115: * stderr is a clone of stdout, because ssh would have set our stdout
1116: * to non-blocking at the same time (which can easily cause us to lose
1117: * output from our print statements). This kluge shouldn't cause ssh
1118: * any problems for how we use it. Note also that we delayed setting
1119: * this until after the above protocol setup so that we know for sure
1120: * that ssh is done twiddling its file descriptors. */
1121: set_blocking(STDERR_FILENO);
1122:
1123: if (am_sender) {
1124: keep_dirlinks = 0; /* Must be disabled on the sender. */
1.1.1.2 ! misho 1125:
! 1126: if (always_checksum
! 1127: && (log_format_has(stdout_format, 'C')
! 1128: || log_format_has(logfile_format, 'C')))
! 1129: sender_keeps_checksum = 1;
! 1130:
1.1 misho 1131: if (protocol_version >= 30)
1.1.1.2 ! misho 1132: io_start_multiplex_out(f_out);
1.1 misho 1133: else
1134: io_start_buffering_out(f_out);
1.1.1.2 ! misho 1135: if (protocol_version >= 31 || (!filesfrom_host && protocol_version >= 23))
! 1136: io_start_multiplex_in(f_in);
! 1137: else
! 1138: io_start_buffering_in(f_in);
1.1 misho 1139: send_filter_list(f_out);
1140: if (filesfrom_host)
1141: filesfrom_fd = f_in;
1142:
1143: if (write_batch && !am_server)
1144: start_write_batch(f_out);
1145: flist = send_file_list(f_out, argc, argv);
1.1.1.2 ! misho 1146: if (DEBUG_GTE(FLIST, 3))
1.1 misho 1147: rprintf(FINFO,"file list sent\n");
1148:
1.1.1.2 ! misho 1149: if (protocol_version < 31 && filesfrom_host && protocol_version >= 23)
! 1150: io_start_multiplex_in(f_in);
1.1 misho 1151:
1152: io_flush(NORMAL_FLUSH);
1153: send_files(f_in, f_out);
1154: io_flush(FULL_FLUSH);
1155: handle_stats(-1);
1156: if (protocol_version >= 24)
1.1.1.2 ! misho 1157: read_final_goodbye(f_in, f_out);
1.1 misho 1158: if (pid != -1) {
1.1.1.2 ! misho 1159: if (DEBUG_GTE(EXIT, 2))
1.1 misho 1160: rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
1161: io_flush(FULL_FLUSH);
1162: wait_process_with_flush(pid, &exit_code);
1163: }
1164: output_summary();
1165: io_flush(FULL_FLUSH);
1166: exit_cleanup(exit_code);
1167: }
1168:
1169: if (!read_batch) {
1170: if (protocol_version >= 23)
1.1.1.2 ! misho 1171: io_start_multiplex_in(f_in);
1.1 misho 1172: if (need_messages_from_generator)
1.1.1.2 ! misho 1173: io_start_multiplex_out(f_out);
! 1174: else
! 1175: io_start_buffering_out(f_out);
1.1 misho 1176: }
1177:
1178: send_filter_list(read_batch ? -1 : f_out);
1179:
1180: if (filesfrom_fd >= 0) {
1.1.1.2 ! misho 1181: start_filesfrom_forwarding(filesfrom_fd);
1.1 misho 1182: filesfrom_fd = -1;
1183: }
1184:
1185: if (write_batch && !am_server)
1186: start_write_batch(f_in);
1187: flist = recv_file_list(f_in);
1188: if (inc_recurse && file_total == 1)
1189: recv_additional_file_list(f_in);
1190:
1191: if (flist && flist->used > 0) {
1192: local_name = get_local_name(flist, argv[0]);
1193:
1194: check_alt_basis_dirs();
1195:
1196: exit_code2 = do_recv(f_in, f_out, local_name);
1197: } else {
1198: handle_stats(-1);
1199: output_summary();
1200: }
1201:
1202: if (pid != -1) {
1.1.1.2 ! misho 1203: if (DEBUG_GTE(RECV, 1))
1.1 misho 1204: rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
1205: io_flush(FULL_FLUSH);
1206: wait_process_with_flush(pid, &exit_code);
1207: }
1208:
1209: return MAX(exit_code, exit_code2);
1210: }
1211:
1212: static int copy_argv(char *argv[])
1213: {
1214: int i;
1215:
1216: for (i = 0; argv[i]; i++) {
1217: if (!(argv[i] = strdup(argv[i]))) {
1218: rprintf (FERROR, "out of memory at %s(%d)\n",
1219: __FILE__, __LINE__);
1220: return RERR_MALLOC;
1221: }
1222: }
1223:
1224: return 0;
1225: }
1226:
1227:
1.1.1.2 ! misho 1228: /* Start a client for either type of remote connection. Work out
1.1 misho 1229: * whether the arguments request a remote shell or rsyncd connection,
1230: * and call the appropriate connection function, then run_client.
1231: *
1232: * Calls either start_socket_client (for sockets) or do_cmd and
1.1.1.2 ! misho 1233: * client_run (for ssh). */
1.1 misho 1234: static int start_client(int argc, char *argv[])
1235: {
1236: char *p, *shell_machine = NULL, *shell_user = NULL;
1237: char **remote_argv;
1238: int remote_argc;
1239: int f_in, f_out;
1240: int ret;
1241: pid_t pid;
1242:
1243: /* Don't clobber argv[] so that ps(1) can still show the right
1244: * command line. */
1245: if ((ret = copy_argv(argv)) != 0)
1246: return ret;
1247:
1248: if (!read_batch) { /* for read_batch, NO source is specified */
1249: char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1250: if (path) { /* source is remote */
1251: char *dummy_host;
1252: int dummy_port = 0;
1253: *argv = path;
1254: remote_argv = argv;
1255: remote_argc = argc;
1256: argv += argc - 1;
1257: if (argc == 1 || **argv == ':')
1258: argc = 0; /* no dest arg */
1259: else if (check_for_hostspec(*argv, &dummy_host, &dummy_port)) {
1260: rprintf(FERROR,
1261: "The source and destination cannot both be remote.\n");
1262: exit_cleanup(RERR_SYNTAX);
1263: } else {
1264: remote_argc--; /* don't count dest */
1265: argc = 1;
1266: }
1267: if (filesfrom_host && *filesfrom_host
1268: && strcmp(filesfrom_host, shell_machine) != 0) {
1269: rprintf(FERROR,
1270: "--files-from hostname is not the same as the transfer hostname\n");
1271: exit_cleanup(RERR_SYNTAX);
1272: }
1273: am_sender = 0;
1274: if (rsync_port)
1275: daemon_over_rsh = shell_cmd ? 1 : -1;
1276: } else { /* source is local, check dest arg */
1277: am_sender = 1;
1278:
1279: if (argc > 1) {
1280: p = argv[--argc];
1281: remote_argv = argv + argc;
1282: } else {
1283: static char *dotarg[1] = { "." };
1284: p = dotarg[0];
1285: remote_argv = dotarg;
1286: }
1287: remote_argc = 1;
1288:
1289: path = check_for_hostspec(p, &shell_machine, &rsync_port);
1290: if (path && filesfrom_host && *filesfrom_host
1291: && strcmp(filesfrom_host, shell_machine) != 0) {
1292: rprintf(FERROR,
1293: "--files-from hostname is not the same as the transfer hostname\n");
1294: exit_cleanup(RERR_SYNTAX);
1295: }
1296: if (!path) { /* no hostspec found, so src & dest are local */
1297: local_server = 1;
1298: if (filesfrom_host) {
1299: rprintf(FERROR,
1300: "--files-from cannot be remote when the transfer is local\n");
1301: exit_cleanup(RERR_SYNTAX);
1302: }
1303: shell_machine = NULL;
1304: } else { /* hostspec was found, so dest is remote */
1305: argv[argc] = path;
1306: if (rsync_port)
1307: daemon_over_rsh = shell_cmd ? 1 : -1;
1308: }
1309: }
1310: } else { /* read_batch */
1311: local_server = 1;
1312: if (check_for_hostspec(argv[argc-1], &shell_machine, &rsync_port)) {
1313: rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1314: exit_cleanup(RERR_SYNTAX);
1315: }
1316: remote_argv = argv += argc - 1;
1317: remote_argc = argc = 1;
1318: }
1319:
1.1.1.2 ! misho 1320: if (!rsync_port && remote_argc && !**remote_argv) /* Turn an empty arg into a dot dir. */
! 1321: *remote_argv = ".";
! 1322:
1.1 misho 1323: if (am_sender) {
1324: char *dummy_host;
1325: int dummy_port = rsync_port;
1326: int i;
1327: /* For local source, extra source args must not have hostspec. */
1328: for (i = 1; i < argc; i++) {
1329: if (check_for_hostspec(argv[i], &dummy_host, &dummy_port)) {
1330: rprintf(FERROR, "Unexpected remote arg: %s\n", argv[i]);
1331: exit_cleanup(RERR_SYNTAX);
1332: }
1333: }
1334: } else {
1335: char *dummy_host;
1336: int dummy_port = rsync_port;
1337: int i;
1338: /* For remote source, any extra source args must have either
1339: * the same hostname or an empty hostname. */
1340: for (i = 1; i < remote_argc; i++) {
1341: char *arg = check_for_hostspec(remote_argv[i], &dummy_host, &dummy_port);
1342: if (!arg) {
1343: rprintf(FERROR, "Unexpected local arg: %s\n", remote_argv[i]);
1344: rprintf(FERROR, "If arg is a remote file/dir, prefix it with a colon (:).\n");
1345: exit_cleanup(RERR_SYNTAX);
1346: }
1347: if (*dummy_host && strcmp(dummy_host, shell_machine) != 0) {
1348: rprintf(FERROR, "All source args must come from the same machine.\n");
1349: exit_cleanup(RERR_SYNTAX);
1350: }
1351: if (rsync_port != dummy_port) {
1352: if (!rsync_port || !dummy_port)
1353: rprintf(FERROR, "All source args must use the same hostspec format.\n");
1354: else
1355: rprintf(FERROR, "All source args must use the same port number.\n");
1356: exit_cleanup(RERR_SYNTAX);
1357: }
1.1.1.2 ! misho 1358: if (!rsync_port && !*arg) /* Turn an empty arg into a dot dir. */
! 1359: arg = ".";
1.1 misho 1360: remote_argv[i] = arg;
1361: }
1362: }
1363:
1364: if (daemon_over_rsh < 0)
1365: return start_socket_client(shell_machine, remote_argc, remote_argv, argc, argv);
1366:
1367: if (password_file && !daemon_over_rsh) {
1368: rprintf(FERROR, "The --password-file option may only be "
1369: "used when accessing an rsync daemon.\n");
1370: exit_cleanup(RERR_SYNTAX);
1371: }
1372:
1373: if (connect_timeout) {
1374: rprintf(FERROR, "The --contimeout option may only be "
1375: "used when connecting to an rsync daemon.\n");
1376: exit_cleanup(RERR_SYNTAX);
1377: }
1378:
1379: if (shell_machine) {
1380: p = strrchr(shell_machine,'@');
1381: if (p) {
1382: *p = 0;
1383: shell_user = shell_machine;
1384: shell_machine = p+1;
1385: }
1386: }
1387:
1.1.1.2 ! misho 1388: if (DEBUG_GTE(CMD, 2)) {
1.1 misho 1389: rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1390: NS(shell_cmd), NS(shell_machine), NS(shell_user),
1.1.1.2 ! misho 1391: NS(remote_argv[0]));
1.1 misho 1392: }
1393:
1394: pid = do_cmd(shell_cmd, shell_machine, shell_user, remote_argv, remote_argc,
1395: &f_in, &f_out);
1396:
1397: /* if we're running an rsync server on the remote host over a
1398: * remote shell command, we need to do the RSYNCD protocol first */
1399: if (daemon_over_rsh) {
1400: int tmpret;
1401: tmpret = start_inband_exchange(f_in, f_out, shell_user, remote_argc, remote_argv);
1402: if (tmpret < 0)
1403: return tmpret;
1404: }
1405:
1406: ret = client_run(f_in, f_out, pid, argc, argv);
1407:
1408: fflush(stdout);
1409: fflush(stderr);
1410:
1411: return ret;
1412: }
1413:
1414:
1415: static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1416: {
1417: exit_cleanup(RERR_SIGNAL1);
1418: }
1419:
1420: static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1421: {
1422: if (!am_server)
1423: output_summary();
1424: close_all();
1425: if (got_xfer_error)
1426: _exit(RERR_PARTIAL);
1427: _exit(0);
1428: }
1429:
1430: RETSIGTYPE remember_children(UNUSED(int val))
1431: {
1432: #ifdef WNOHANG
1433: int cnt, status;
1434: pid_t pid;
1435: /* An empty waitpid() loop was put here by Tridge and we could never
1436: * get him to explain why he put it in, so rather than taking it
1437: * out we're instead saving the child exit statuses for later use.
1438: * The waitpid() loop presumably eliminates all possibility of leaving
1439: * zombie children, maybe that's why he did it. */
1440: while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1441: /* save the child's exit status */
1442: for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1443: if (pid_stat_table[cnt].pid == 0) {
1444: pid_stat_table[cnt].pid = pid;
1445: pid_stat_table[cnt].status = status;
1446: break;
1447: }
1448: }
1449: }
1450: #endif
1451: #ifndef HAVE_SIGACTION
1452: signal(SIGCHLD, remember_children);
1453: #endif
1454: }
1455:
1456:
1457: /**
1458: * This routine catches signals and tries to send them to gdb.
1459: *
1460: * Because it's called from inside a signal handler it ought not to
1461: * use too many library routines.
1462: *
1463: * @todo Perhaps use "screen -X" instead/as well, to help people
1464: * debugging without easy access to X. Perhaps use an environment
1465: * variable, or just call a script?
1466: *
1467: * @todo The /proc/ magic probably only works on Linux (and
1468: * Solaris?) Can we be more portable?
1469: **/
1470: #ifdef MAINTAINER_MODE
1471: const char *get_panic_action(void)
1472: {
1473: const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1474:
1475: if (cmd_fmt)
1476: return cmd_fmt;
1477: else
1478: return "xterm -display :0 -T Panic -n Panic "
1479: "-e gdb /proc/%d/exe %d";
1480: }
1481:
1482:
1483: /**
1484: * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1485: *
1486: * This signal handler is only installed if we were configured with
1487: * --enable-maintainer-mode. Perhaps it should always be on and we
1488: * should just look at the environment variable, but I'm a bit leery
1489: * of a signal sending us into a busy loop.
1490: **/
1491: static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1492: {
1493: char cmd_buf[300];
1.1.1.2 ! misho 1494: int ret, pid_int = getpid();
1.1 misho 1495:
1.1.1.2 ! misho 1496: snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(), pid_int, pid_int);
1.1 misho 1497:
1498: /* Unless we failed to execute gdb, we allow the process to
1499: * continue. I'm not sure if that's right. */
1500: ret = system(cmd_buf);
1501: if (ret)
1502: _exit(ret);
1503: }
1504: #endif
1505:
1506:
1507: int main(int argc,char *argv[])
1508: {
1509: int ret;
1510: int orig_argc = argc;
1511: char **orig_argv = argv;
1512: #ifdef HAVE_SIGACTION
1513: # ifdef HAVE_SIGPROCMASK
1514: sigset_t sigmask;
1515:
1516: sigemptyset(&sigmask);
1517: # endif
1518: sigact.sa_flags = SA_NOCLDSTOP;
1519: #endif
1520: SIGACTMASK(SIGUSR1, sigusr1_handler);
1521: SIGACTMASK(SIGUSR2, sigusr2_handler);
1522: SIGACTMASK(SIGCHLD, remember_children);
1523: #ifdef MAINTAINER_MODE
1524: SIGACTMASK(SIGSEGV, rsync_panic_handler);
1525: SIGACTMASK(SIGFPE, rsync_panic_handler);
1526: SIGACTMASK(SIGABRT, rsync_panic_handler);
1527: SIGACTMASK(SIGBUS, rsync_panic_handler);
1528: #endif
1529:
1530: starttime = time(NULL);
1531: our_uid = MY_UID();
1.1.1.2 ! misho 1532: our_gid = MY_GID();
1.1 misho 1533: am_root = our_uid == 0;
1534:
1535: memset(&stats, 0, sizeof(stats));
1536:
1537: if (argc < 2) {
1538: usage(FERROR);
1539: exit_cleanup(RERR_SYNTAX);
1540: }
1541:
1.1.1.2 ! misho 1542: /* Get the umask for use in permission calculations. We no longer set
! 1543: * it to zero; that is ugly and pointless now that all the callers that
! 1544: * relied on it have been reeducated to work with default ACLs. */
! 1545: umask(orig_umask = umask(0));
1.1 misho 1546:
1547: #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1548: setlocale(LC_CTYPE, "");
1549: #endif
1550:
1551: if (!parse_arguments(&argc, (const char ***) &argv)) {
1552: /* FIXME: We ought to call the same error-handling
1553: * code here, rather than relying on getopt. */
1554: option_error();
1555: exit_cleanup(RERR_SYNTAX);
1556: }
1557:
1558: SIGACTMASK(SIGINT, sig_int);
1559: SIGACTMASK(SIGHUP, sig_int);
1560: SIGACTMASK(SIGTERM, sig_int);
1561: #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1562: sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1563: #endif
1564:
1565: /* Ignore SIGPIPE; we consistently check error codes and will
1566: * see the EPIPE. */
1567: SIGACTION(SIGPIPE, SIG_IGN);
1568: #ifdef SIGXFSZ
1569: SIGACTION(SIGXFSZ, SIG_IGN);
1570: #endif
1571:
1572: /* Initialize change_dir() here because on some old systems getcwd
1573: * (implemented by forking "pwd" and reading its output) doesn't
1574: * work when there are other child processes. Also, on all systems
1575: * that implement getcwd that way "pwd" can't be found after chroot. */
1576: change_dir(NULL, CD_NORMAL);
1577:
1578: init_flist();
1579:
1580: if ((write_batch || read_batch) && !am_server) {
1581: if (write_batch)
1582: write_batch_shell_file(orig_argc, orig_argv, argc);
1583:
1584: if (read_batch && strcmp(batch_name, "-") == 0)
1585: batch_fd = STDIN_FILENO;
1586: else {
1587: batch_fd = do_open(batch_name,
1588: write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1589: : O_RDONLY, S_IRUSR | S_IWUSR);
1590: }
1591: if (batch_fd < 0) {
1592: rsyserr(FERROR, errno, "Batch file %s open error",
1593: full_fname(batch_name));
1594: exit_cleanup(RERR_FILEIO);
1595: }
1596: if (read_batch)
1597: read_stream_flags(batch_fd);
1598: else
1599: write_stream_flags(batch_fd);
1600: }
1601: if (write_batch < 0)
1602: dry_run = 1;
1603:
1604: if (am_server) {
1605: #ifdef ICONV_CONST
1606: setup_iconv();
1607: #endif
1608: } else if (am_daemon)
1609: return daemon_main();
1610:
1611: if (am_server && protect_args) {
1612: char buf[MAXPATHLEN];
1613: protect_args = 2;
1614: read_args(STDIN_FILENO, NULL, buf, sizeof buf, 1, &argv, &argc, NULL);
1615: if (!parse_arguments(&argc, (const char ***) &argv)) {
1616: option_error();
1617: exit_cleanup(RERR_SYNTAX);
1618: }
1619: }
1620:
1621: if (argc < 1) {
1622: usage(FERROR);
1623: exit_cleanup(RERR_SYNTAX);
1624: }
1625:
1626: if (am_server) {
1627: set_nonblocking(STDIN_FILENO);
1628: set_nonblocking(STDOUT_FILENO);
1629: if (am_daemon)
1630: return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1631: start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1632: }
1633:
1634: ret = start_client(argc, argv);
1635: if (ret == -1)
1636: exit_cleanup(RERR_STARTCLIENT);
1637: else
1638: exit_cleanup(ret);
1639:
1640: return ret;
1641: }
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