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GeezerVison is showing github.com — rsync/main.c at master · nativeclass/rsync Expand file tree/ Copy pathmain.cMore file actions 1822 lines (1591 loc) · 48.4 KB / Copy pathmain.cFile metadata and controls1822 lines (1591 loc) · 48.4 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 /* * The startup routines, including main(), for rsync. * * Copyright (C) 1996-2001 Andrew Tridgell <[email protected]> * Copyright (C) 1996 Paul Mackerras * Copyright (C) 2001, 2002 Martin Pool <[email protected]> * Copyright (C) 2003-2020 Wayne Davison * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, visit the http://fsf.org website. */ #include "rsync.h" #include "inums.h" #include "ifuncs.h" #include "io.h" #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H #include <locale.h> #endif #include <popt.h> #ifdef __TANDEM #include <floss.h(floss_execlp)> #endif extern int dry_run; extern int list_only; extern int io_timeout; extern int am_root; extern int am_server; extern int am_sender; extern int am_daemon; extern int inc_recurse; extern int blocking_io; extern int always_checksum; extern int remove_source_files; extern int output_needs_newline; extern int called_from_signal_handler; extern int need_messages_from_generator; extern int kluge_around_eof; extern int got_xfer_error; extern int msgs2stderr; extern int module_id; extern int read_only; extern int copy_links; extern int copy_dirlinks; extern int copy_unsafe_links; extern int keep_dirlinks; extern int preserve_hard_links; extern int protocol_version; extern int mkpath_dest_arg; extern int file_total; extern int recurse; extern int xfer_dirs; extern int protect_args; extern int relative_paths; extern int sanitize_paths; extern int curr_dir_depth; extern int curr_dir_len; extern int module_id; extern int rsync_port; extern int whole_file; extern int read_batch; extern int write_batch; extern int batch_fd; extern int sock_f_in; extern int sock_f_out; extern int filesfrom_fd; extern int connect_timeout; extern int send_msgs_to_gen; extern dev_t filesystem_dev; extern pid_t cleanup_child_pid; extern size_t bwlimit_writemax; extern unsigned int module_dirlen; extern BOOL flist_receiving_enabled; extern BOOL want_progress_now; extern BOOL shutting_down; extern int backup_dir_len; extern int basis_dir_cnt; extern int default_af_hint; extern struct stats stats; extern char *stdout_format; extern char *logfile_format; extern char *filesfrom_host; extern char *partial_dir; extern char *rsync_path; extern char *shell_cmd; extern char *password_file; extern char *backup_dir; extern char *copy_as; extern char *tmpdir; extern char curr_dir[MAXPATHLEN]; extern char backup_dir_buf[MAXPATHLEN]; extern char *basis_dir[MAX_BASIS_DIRS+1]; extern struct file_list *first_flist; extern filter_rule_list daemon_filter_list; uid_t our_uid; gid_t our_gid; int am_receiver = 0; /* Only set to 1 after the receiver/generator fork. */ int am_generator = 0; /* Only set to 1 after the receiver/generator fork. */ int local_server = 0; int daemon_connection = 0; /* 0 = no daemon, 1 = daemon via remote shell, -1 = daemon via socket */ mode_t orig_umask = 0; int batch_gen_fd = -1; int sender_keeps_checksum = 0; int raw_argc, cooked_argc; char **raw_argv, **cooked_argv; /* There's probably never more than at most 2 outstanding child processes, * but set it higher, just in case. */ #define MAXCHILDPROCS 7 #ifdef HAVE_SIGACTION # ifdef HAVE_SIGPROCMASK # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n)) # else # define SIGACTMASK(n,h) SIGACTION(n,h) # endif static struct sigaction sigact; #endif struct pid_status { pid_t pid; int status; } pid_stat_table[MAXCHILDPROCS]; static time_t starttime, endtime; static int64 total_read, total_written; static void show_malloc_stats(void); /* Works like waitpid(), but if we already harvested the child pid in our * remember_children(), we succeed instead of returning an error. */ pid_t wait_process(pid_t pid, int *status_ptr, int flags) { pid_t waited_pid; do { waited_pid = waitpid(pid, status_ptr, flags); } while (waited_pid == -1 && errno == EINTR); if (waited_pid == -1 && errno == ECHILD) { /* Status of requested child no longer available: check to * see if it was processed by remember_children(). */ int cnt; for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { if (pid == pid_stat_table[cnt].pid) { *status_ptr = pid_stat_table[cnt].status; pid_stat_table[cnt].pid = 0; return pid; } } } return waited_pid; } int shell_exec(const char *cmd) { char *shell = getenv("RSYNC_SHELL"); int status; pid_t pid; if (!shell) return system(cmd); if ((pid = fork()) < 0) return -1; if (pid == 0) { execlp(shell, shell, "-c", cmd, NULL); _exit(1); } int ret = wait_process(pid, &status, 0); return ret < 0 ? -1 : status; } /* Wait for a process to exit, calling io_flush while waiting. */ static void wait_process_with_flush(pid_t pid, int *exit_code_ptr) { pid_t waited_pid; int status; while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) { msleep(20); io_flush(FULL_FLUSH); } /* TODO: If the child exited on a signal, then log an * appropriate error message. Perhaps we should also accept a * message describing the purpose of the child. Also indicate * this to the caller so that they know something went wrong. */ if (waited_pid < 0) { rsyserr(FERROR, errno, "waitpid"); *exit_code_ptr = RERR_WAITCHILD; } else if (!WIFEXITED(status)) { #ifdef WCOREDUMP if (WCOREDUMP(status)) *exit_code_ptr = RERR_CRASHED; else #endif if (WIFSIGNALED(status)) *exit_code_ptr = RERR_TERMINATED; else *exit_code_ptr = RERR_WAITCHILD; } else *exit_code_ptr = WEXITSTATUS(status); } void write_del_stats(int f) { if (read_batch) write_int(f, NDX_DEL_STATS); else write_ndx(f, NDX_DEL_STATS); write_varint(f, stats.deleted_files - stats.deleted_dirs - stats.deleted_symlinks - stats.deleted_devices - stats.deleted_specials); write_varint(f, stats.deleted_dirs); write_varint(f, stats.deleted_symlinks); write_varint(f, stats.deleted_devices); write_varint(f, stats.deleted_specials); } void read_del_stats(int f) { stats.deleted_files = read_varint(f); stats.deleted_files += stats.deleted_dirs = read_varint(f); stats.deleted_files += stats.deleted_symlinks = read_varint(f); stats.deleted_files += stats.deleted_devices = read_varint(f); stats.deleted_files += stats.deleted_specials = read_varint(f); } static void become_copy_as_user() { char *gname; uid_t uid; gid_t gid; if (!copy_as) return; if (DEBUG_GTE(CMD, 2)) rprintf(FINFO, "[%s] copy_as=%s\n", who_am_i(), copy_as); if ((gname = strchr(copy_as, ':')) != NULL) *gname++ = '\0'; if (!user_to_uid(copy_as, &uid, True)) { rprintf(FERROR, "Invalid copy-as user: %s\n", copy_as); exit_cleanup(RERR_SYNTAX); } if (gname) { if (!group_to_gid(gname, &gid, True)) { rprintf(FERROR, "Invalid copy-as group: %s\n", gname); exit_cleanup(RERR_SYNTAX); } } else { struct passwd *pw; if ((pw = getpwuid(uid)) == NULL) { rsyserr(FERROR, errno, "getpwuid failed"); exit_cleanup(RERR_SYNTAX); } gid = pw->pw_gid; } if (setgid(gid) < 0) { rsyserr(FERROR, errno, "setgid failed"); exit_cleanup(RERR_SYNTAX); } #ifdef HAVE_SETGROUPS if (setgroups(1, &gid)) { rsyserr(FERROR, errno, "setgroups failed"); exit_cleanup(RERR_SYNTAX); } #endif #ifdef HAVE_INITGROUPS if (!gname && initgroups(copy_as, gid) < 0) { rsyserr(FERROR, errno, "initgroups failed"); exit_cleanup(RERR_SYNTAX); } #endif if (setuid(uid) < 0 #ifdef HAVE_SETEUID || seteuid(uid) < 0 #endif ) { rsyserr(FERROR, errno, "setuid failed"); exit_cleanup(RERR_SYNTAX); } our_uid = MY_UID(); our_gid = MY_GID(); am_root = (our_uid == ROOT_UID); if (gname) gname[-1] = ':'; } /* This function gets called from all 3 processes. We want the client side * to actually output the text, but the sender is the only process that has * all the stats we need. So, if we're a client sender, we do the report. * If we're a server sender, we write the stats on the supplied fd. If * we're the client receiver we read the stats from the supplied fd and do * the report. All processes might also generate a set of debug stats, if * the verbose level is high enough (this is the only thing that the * generator process and the server receiver ever do here). */ static void handle_stats(int f) { endtime = time(NULL); /* Cache two stats because the read/write code can change it. */ total_read = stats.total_read; total_written = stats.total_written; if (INFO_GTE(STATS, 3)) { /* These come out from every process */ show_malloc_stats(); show_flist_stats(); } if (am_generator) return; if (am_daemon) { if (f == -1 || !am_sender) return; } if (am_server) { if (am_sender) { write_varlong30(f, total_read, 3); write_varlong30(f, total_written, 3); write_varlong30(f, stats.total_size, 3); if (protocol_version >= 29) { write_varlong30(f, stats.flist_buildtime, 3); write_varlong30(f, stats.flist_xfertime, 3); } } return; } /* this is the client */ if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */ ; else if (!am_sender) { /* Read the first two in opposite order because the meaning of * read/write swaps when switching from sender to receiver. */ total_written = read_varlong30(f, 3); total_read = read_varlong30(f, 3); stats.total_size = read_varlong30(f, 3); if (protocol_version >= 29) { stats.flist_buildtime = read_varlong30(f, 3); stats.flist_xfertime = read_varlong30(f, 3); } } else if (write_batch) { /* The --read-batch process is going to be a client * receiver, so we need to give it the stats. */ write_varlong30(batch_fd, total_read, 3); write_varlong30(batch_fd, total_written, 3); write_varlong30(batch_fd, stats.total_size, 3); if (protocol_version >= 29) { write_varlong30(batch_fd, stats.flist_buildtime, 3); write_varlong30(batch_fd, stats.flist_xfertime, 3); } } } static void output_itemized_counts(const char *prefix, int *counts) { static char *labels[] = { "reg", "dir", "link", "dev", "special" }; char buf[1024], *pre = " ("; int j, len = 0; int total = counts[0]; if (total) { counts[0] -= counts[1] + counts[2] + counts[3] + counts[4]; for (j = 0; j < 5; j++) { if (counts[j]) { len += snprintf(buf+len, sizeof buf - len - 2, "%s%s: %s", pre, labels[j], comma_num(counts[j])); pre = ", "; } } buf[len++] = ')'; } buf[len] = '\0'; rprintf(FINFO, "%s: %s%s\n", prefix, comma_num(total), buf); } static const char *bytes_per_sec_human_dnum(void) { if (starttime == (time_t)-1 || endtime == (time_t)-1) return "UNKNOWN"; return human_dnum((total_written + total_read) / (0.5 + (endtime - starttime)), 2); } static void output_summary(void) { if (INFO_GTE(STATS, 2)) { rprintf(FCLIENT, "\n"); output_itemized_counts("Number of files", &stats.num_files); if (protocol_version >= 29) output_itemized_counts("Number of created files", &stats.created_files); if (protocol_version >= 31) output_itemized_counts("Number of deleted files", &stats.deleted_files); rprintf(FINFO,"Number of regular files transferred: %s\n", comma_num(stats.xferred_files)); rprintf(FINFO,"Total file size: %s bytes\n", human_num(stats.total_size)); rprintf(FINFO,"Total transferred file size: %s bytes\n", human_num(stats.total_transferred_size)); rprintf(FINFO,"Literal data: %s bytes\n", human_num(stats.literal_data)); rprintf(FINFO,"Matched data: %s bytes\n", human_num(stats.matched_data)); rprintf(FINFO,"File list size: %s\n", human_num(stats.flist_size)); if (stats.flist_buildtime) { rprintf(FINFO, "File list generation time: %s seconds\n", comma_dnum((double)stats.flist_buildtime / 1000, 3)); rprintf(FINFO, "File list transfer time: %s seconds\n", comma_dnum((double)stats.flist_xfertime / 1000, 3)); } rprintf(FINFO,"Total bytes sent: %s\n", human_num(total_written)); rprintf(FINFO,"Total bytes received: %s\n", human_num(total_read)); } if (INFO_GTE(STATS, 1)) { rprintf(FCLIENT, "\n"); rprintf(FINFO, "sent %s bytes received %s bytes %s bytes/sec\n", human_num(total_written), human_num(total_read), bytes_per_sec_human_dnum()); rprintf(FINFO, "total size is %s speedup is %s%s\n", human_num(stats.total_size), comma_dnum((double)stats.total_size / (total_written+total_read), 2), write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : ""); } fflush(stdout); fflush(stderr); } /** * If our C library can get malloc statistics, then show them to FINFO **/ static void show_malloc_stats(void) { #ifdef HAVE_MALLINFO struct mallinfo mi; mi = mallinfo(); rprintf(FCLIENT, "\n"); rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n", (int)getpid(), am_server ? "server " : "", am_daemon ? "daemon " : "", who_am_i()); rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n", (long)mi.arena); rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n", (long)mi.ordblks); rprintf(FINFO, " smblks: %10ld\n", (long)mi.smblks); rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n", (long)mi.hblks); rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n", (long)mi.hblkhd); rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n", (long)mi.arena + mi.hblkhd); rprintf(FINFO, " usmblks: %10ld\n", (long)mi.usmblks); rprintf(FINFO, " fsmblks: %10ld\n", (long)mi.fsmblks); rprintf(FINFO, " uordblks: %10ld (bytes used)\n", (long)mi.uordblks); rprintf(FINFO, " fordblks: %10ld (bytes free)\n", (long)mi.fordblks); rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n", (long)mi.keepcost); #endif /* HAVE_MALLINFO */ } /* Start the remote shell. cmd may be NULL to use the default. */ static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc, int *f_in_p, int *f_out_p) { int i, argc = 0; char *args[MAX_ARGS], *need_to_free = NULL; pid_t pid; int dash_l_set = 0; if (!read_batch && !local_server) { char *t, *f, in_quote = '\0'; char *rsh_env = getenv(RSYNC_RSH_ENV); if (!cmd) cmd = rsh_env; if (!cmd) cmd = RSYNC_RSH; cmd = need_to_free = strdup(cmd); for (t = f = cmd; *f; f++) { if (*f == ' ') continue; /* Comparison leaves rooms for server_options(). */ if (argc >= MAX_ARGS - MAX_SERVER_ARGS) goto arg_overflow; args[argc++] = t; while (*f != ' ' || in_quote) { if (!*f) { if (in_quote) { rprintf(FERROR, "Missing trailing-%c in remote-shell command.\n", in_quote); exit_cleanup(RERR_SYNTAX); } f--; break; } if (*f == '\'' || *f == '"') { if (!in_quote) { in_quote = *f++; continue; } if (*f == in_quote && *++f != in_quote) { in_quote = '\0'; continue; } } *t++ = *f++; } *t++ = '\0'; } /* NOTE: must preserve t == start of command name until the end of the args handling! */ if ((t = strrchr(cmd, '/')) != NULL) t++; else t = cmd; /* Check to see if we've already been given '-l user' in the remote-shell command. */ for (i = 0; i < argc-1; i++) { if (!strcmp(args[i], "-l") && args[i+1][0] != '-') dash_l_set = 1; } #ifdef HAVE_REMSH /* remsh (on HPUX) takes the arguments the other way around */ args[argc++] = machine; if (user && !(daemon_connection && dash_l_set)) { args[argc++] = "-l"; args[argc++] = user; } #else if (user && !(daemon_connection && dash_l_set)) { args[argc++] = "-l"; args[argc++] = user; } #ifdef AF_INET if (default_af_hint == AF_INET && strcmp(t, "ssh") == 0) args[argc++] = "-4"; /* we're using ssh so we can add a -4 option */ #endif #ifdef AF_INET6 if (default_af_hint == AF_INET6 && strcmp(t, "ssh") == 0) args[argc++] = "-6"; /* we're using ssh so we can add a -6 option */ #endif args[argc++] = machine; #endif args[argc++] = rsync_path; if (blocking_io < 0 && (strcmp(t, "rsh") == 0 || strcmp(t, "remsh") == 0)) blocking_io = 1; if (daemon_connection > 0) { args[argc++] = "--server"; args[argc++] = "--daemon"; } else server_options(args, &argc); if (argc >= MAX_ARGS - 2) goto arg_overflow; } args[argc++] = "."; if (!daemon_connection) { while (remote_argc > 0) { if (argc >= MAX_ARGS - 1) { arg_overflow: rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); exit_cleanup(RERR_SYNTAX); } if (**remote_argv == '-') { if (asprintf(args + argc++, "./%s", *remote_argv++) < 0) out_of_memory("do_cmd"); } else args[argc++] = *remote_argv++; remote_argc--; } } args[argc] = NULL; if (DEBUG_GTE(CMD, 2)) { for (i = 0; i < argc; i++) rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]); rprintf(FCLIENT, "\n"); } if (read_batch) { int from_gen_pipe[2]; set_allow_inc_recurse(); if (fd_pair(from_gen_pipe) < 0) { rsyserr(FERROR, errno, "pipe"); exit_cleanup(RERR_IPC); } batch_gen_fd = from_gen_pipe[0]; *f_out_p = from_gen_pipe[1]; *f_in_p = batch_fd; pid = (pid_t)-1; /* no child pid */ #ifdef ICONV_CONST setup_iconv(); #endif } else if (local_server) { /* If the user didn't request --[no-]whole-file, force * it on, but only if we're not batch processing. */ if (whole_file < 0 && !write_batch) whole_file = 1; set_allow_inc_recurse(); pid = local_child(argc, args, f_in_p, f_out_p, child_main); #ifdef ICONV_CONST setup_iconv(); #endif } else { pid = piped_child(args, f_in_p, f_out_p); #ifdef ICONV_CONST setup_iconv(); #endif if (protect_args && !daemon_connection) send_protected_args(*f_out_p, args); } if (need_to_free) free(need_to_free); return pid; } /* The receiving side operates in one of two modes: * * 1. it receives any number of files into a destination directory, * placing them according to their names in the file-list. * * 2. it receives a single file and saves it using the name in the * destination path instead of its file-list name. This requires a * "local name" for writing out the destination file. * * So, our task is to figure out what mode/local-name we need. * For mode 1, we change into the destination directory and return NULL. * For mode 2, we change into the directory containing the destination * file (if we aren't already there) and return the local-name. */ static char *get_local_name(struct file_list *flist, char *dest_path) { STRUCT_STAT st; int statret, trailing_slash; char *cp; if (DEBUG_GTE(RECV, 1)) { rprintf(FINFO, "get_local_name count=%d %s\n", file_total, NS(dest_path)); } if (!dest_path || list_only) return NULL; /* Treat an empty string as a copy into the current directory. */ if (!*dest_path) dest_path = "."; if (daemon_filter_list.head) { char *slash = strrchr(dest_path, '/'); if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0'))) *slash = '\0'; else slash = NULL; if ((*dest_path != '.' || dest_path[1] != '\0') && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0 || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) { rprintf(FERROR, "ERROR: daemon has excluded destination \"%s\"\n", dest_path); exit_cleanup(RERR_FILESELECT); } if (slash) *slash = '/'; } /* See what currently exists at the destination. */ statret = do_stat(dest_path, &st); cp = strrchr(dest_path, '/'); trailing_slash = cp && !cp[1]; if (mkpath_dest_arg && statret < 0 && (cp || file_total > 1)) { int save_errno = errno; int ret = make_path(dest_path, file_total > 1 && !trailing_slash ? 0 : MKP_DROP_NAME); if (ret < 0) goto mkdir_error; if (ret && INFO_GTE(NAME, 1)) { if (file_total == 1 || trailing_slash) *cp = '\0'; rprintf(FINFO, "created %d director%s for %s\n", ret, ret == 1 ? "y" : "ies", dest_path); if (file_total == 1 || trailing_slash) *cp = '/'; } if (ret) statret = do_stat(dest_path, &st); else errno = save_errno; } if (statret == 0) { /* If the destination is a dir, enter it and use mode 1. */ if (S_ISDIR(st.st_mode)) { if (!change_dir(dest_path, CD_NORMAL)) { rsyserr(FERROR, errno, "change_dir#1 %s failed", full_fname(dest_path)); exit_cleanup(RERR_FILESELECT); } filesystem_dev = st.st_dev; /* ensures --force works right w/-x */ return NULL; } if (file_total > 1) { rprintf(FERROR, "ERROR: destination must be a directory when" " copying more than 1 file\n"); exit_cleanup(RERR_FILESELECT); } if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) { rprintf(FERROR, "ERROR: cannot overwrite non-directory" " with a directory\n"); exit_cleanup(RERR_FILESELECT); } } else if (errno != ENOENT) { /* If we don't know what's at the destination, fail. */ rsyserr(FERROR, errno, "ERROR: cannot stat destination %s", full_fname(dest_path)); exit_cleanup(RERR_FILESELECT); } /* If we need a destination directory because the transfer is not * of a single non-directory or the user has requested one via a * destination path ending in a slash, create one and use mode 1. */ if (file_total > 1 || trailing_slash) { if (trailing_slash) *cp = '\0'; /* Lop off the final slash (if any). */ if (statret == 0) { rprintf(FERROR, "ERROR: destination path is not a directory\n"); exit_cleanup(RERR_SYNTAX); } if (do_mkdir(dest_path, ACCESSPERMS) != 0) { mkdir_error: rsyserr(FERROR, errno, "mkdir %s failed", full_fname(dest_path)); exit_cleanup(RERR_FILEIO); } if (flist->high >= flist->low && strcmp(flist->files[flist->low]->basename, ".") == 0) flist->files[0]->flags |= FLAG_DIR_CREATED; if (INFO_GTE(NAME, 1)) rprintf(FINFO, "created directory %s\n", dest_path); if (dry_run) { /* Indicate that dest dir doesn't really exist. */ dry_run++; } if (!change_dir(dest_path, dry_run > 1 ? CD_SKIP_CHDIR : CD_NORMAL)) { rsyserr(FERROR, errno, "change_dir#2 %s failed", full_fname(dest_path)); exit_cleanup(RERR_FILESELECT); } return NULL; } /* Otherwise, we are writing a single file, possibly on top of an * existing non-directory. Change to the item's parent directory * (if it has a path component), return the basename of the * destination file as the local name, and use mode 2. */ if (!cp) return dest_path; if (cp == dest_path) dest_path = "/"; *cp = '\0'; if (!change_dir(dest_path, CD_NORMAL)) { rsyserr(FERROR, errno, "change_dir#3 %s failed", full_fname(dest_path)); exit_cleanup(RERR_FILESELECT); } *cp = '/'; return cp + 1; } /* This function checks on our alternate-basis directories. If we're in * dry-run mode and the destination dir does not yet exist, we'll try to * tweak any dest-relative paths to make them work for a dry-run (the * destination dir must be in curr_dir[] when this function is called). * We also warn about any arg that is non-existent or not a directory. */ static void check_alt_basis_dirs(void) { STRUCT_STAT st; char *slash = strrchr(curr_dir, '/'); int j; for (j = 0; j < basis_dir_cnt; j++) { char *bdir = basis_dir[j]; int bd_len = strlen(bdir); if (bd_len > 1 && bdir[bd_len-1] == '/') bdir[--bd_len] = '\0'; if (dry_run > 1 && *bdir != '/') { int len = curr_dir_len + 1 + bd_len + 1; char *new = new_array(char, len); if (slash && strncmp(bdir, "../", 3) == 0) { /* We want to remove only one leading "../" prefix for * the directory we couldn't create in dry-run mode: * this ensures that any other ".." references get * evaluated the same as they would for a live copy. */ *slash = '\0'; pathjoin(new, len, curr_dir, bdir + 3); *slash = '/'; } else pathjoin(new, len, curr_dir, bdir); basis_dir[j] = bdir = new; } if (do_stat(bdir, &st) < 0) rprintf(FWARNING, "%s arg does not exist: %s\n", alt_dest_opt(0), bdir); else if (!S_ISDIR(st.st_mode)) rprintf(FWARNING, "%s arg is not a dir: %s\n", alt_dest_opt(0), bdir); } } /* This is only called by the sender. */ static void read_final_goodbye(int f_in, int f_out) { int i, iflags, xlen; uchar fnamecmp_type; char xname[MAXPATHLEN]; shutting_down = True; if (protocol_version < 29) i = read_int(f_in); else { i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen); if (protocol_version >= 31 && i == NDX_DONE) { if (am_sender) write_ndx(f_out, NDX_DONE); else { if (batch_gen_fd >= 0) { while (read_int(batch_gen_fd) != NDX_DEL_STATS) {} read_del_stats(batch_gen_fd); } write_int(f_out, NDX_DONE); } i = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type, xname, &xlen); } } if (i != NDX_DONE) { rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n", i, who_am_i()); exit_cleanup(RERR_PROTOCOL); } } static void do_server_sender(int f_in, int f_out, int argc, char *argv[]) { struct file_list *flist; char *dir; if (DEBUG_GTE(SEND, 1)) rprintf(FINFO, "server_sender starting pid=%d\n", (int)getpid()); if (am_daemon && lp_write_only(module_id)) { rprintf(FERROR, "ERROR: module is write only\n"); exit_cleanup(RERR_SYNTAX); } if (am_daemon && read_only && remove_source_files) { rprintf(FERROR, "ERROR: --remove-%s-files cannot be used with a read-only module\n", remove_source_files == 1 ? "source" : "sent"); exit_cleanup(RERR_SYNTAX); } if (argc < 1) { rprintf(FERROR, "ERROR: do_server_sender called without args\n"); exit_cleanup(RERR_SYNTAX); } become_copy_as_user(); dir = argv[0]; if (!relative_paths) { if (!change_dir(dir, CD_NORMAL)) { rsyserr(FERROR, errno, "change_dir#3 %s failed", full_fname(dir)); exit_cleanup(RERR_FILESELECT); } } argc--; argv++; if (argc == 0 && (recurse || xfer_dirs || list_only)) { argc = 1; argv--; argv[0] = "."; } flist = send_file_list(f_out,argc,argv); if (!flist || flist->used == 0) { /* Make sure input buffering is off so we can't hang in noop_io_until_death(). */ io_end_buffering_in(0); /* TODO: we should really exit in a more controlled manner. */ exit_cleanup(0); } io_start_buffering_in(f_in); send_files(f_in, f_out); io_flush(FULL_FLUSH); handle_stats(f_out); if (protocol_version >= 24) read_final_goodbye(f_in, f_out); io_flush(FULL_FLUSH); exit_cleanup(0); } static int do_recv(int f_in, int f_out, char *local_name) { int pid; int exit_code = 0; int error_pipe[2]; /* The receiving side mustn't obey this, or an existing symlink that * points to an identical file won't be replaced by the referent. */ copy_links = copy_dirlinks = copy_unsafe_links = 0; #ifdef SUPPORT_HARD_LINKS if (preserve_hard_links && !inc_recurse) match_hard_links(first_flist); #endif if (fd_pair(error_pipe) < 0) { rsyserr(FERROR, errno, "pipe failed in do_recv"); exit_cleanup(RERR_IPC); } if (backup_dir) { STRUCT_STAT st; int ret; if (backup_dir_len > 1) backup_dir_buf[backup_dir_len-1] = '\0'; ret = do_stat(backup_dir_buf, &st); if (ret != 0 || !S_ISDIR(st.st_mode)) { if (ret == 0) { rprintf(FERROR, "The backup-dir is not a directory: %s\n", backup_dir_buf); exit_cleanup(RERR_SYNTAX); } if (errno != ENOENT) { rprintf(FERROR, "Failed to stat %s: %s\n", backup_dir_buf, strerror(errno)); exit_cleanup(RERR_FILEIO); } |
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