| 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) 2003-2008 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 dry_run; |
| 31 | extern int list_only; |
| 32 | extern int am_root; |
| 33 | extern int am_server; |
| 34 | extern int am_sender; |
| 35 | extern int am_daemon; |
| 36 | extern int inc_recurse; |
| 37 | extern int blocking_io; |
| 38 | extern int human_readable; |
| 39 | extern int always_checksum; |
| 40 | extern int remove_source_files; |
| 41 | extern int output_needs_newline; |
| 42 | extern int need_messages_from_generator; |
| 43 | extern int kluge_around_eof; |
| 44 | extern int got_xfer_error; |
| 45 | extern int msgs2stderr; |
| 46 | extern int module_id; |
| 47 | extern int copy_links; |
| 48 | extern int copy_dirlinks; |
| 49 | extern int copy_unsafe_links; |
| 50 | extern int keep_dirlinks; |
| 51 | extern int preserve_hard_links; |
| 52 | extern int protocol_version; |
| 53 | extern int file_total; |
| 54 | extern int recurse; |
| 55 | extern int xfer_dirs; |
| 56 | extern int protect_args; |
| 57 | extern int relative_paths; |
| 58 | extern int sanitize_paths; |
| 59 | extern int curr_dir_depth; |
| 60 | extern int curr_dir_len; |
| 61 | extern int module_id; |
| 62 | extern int rsync_port; |
| 63 | extern int whole_file; |
| 64 | extern int read_batch; |
| 65 | extern int write_batch; |
| 66 | extern int batch_fd; |
| 67 | extern int filesfrom_fd; |
| 68 | extern int connect_timeout; |
| 69 | extern pid_t cleanup_child_pid; |
| 70 | extern unsigned int module_dirlen; |
| 71 | extern struct stats stats; |
| 72 | extern char *stdout_format; |
| 73 | extern char *logfile_format; |
| 74 | extern char *filesfrom_host; |
| 75 | extern char *partial_dir; |
| 76 | extern char *dest_option; |
| 77 | extern char *rsync_path; |
| 78 | extern char *shell_cmd; |
| 79 | extern char *batch_name; |
| 80 | extern char *password_file; |
| 81 | extern char curr_dir[MAXPATHLEN]; |
| 82 | extern char *basis_dir[MAX_BASIS_DIRS+1]; |
| 83 | extern struct file_list *first_flist; |
| 84 | extern struct filter_list_struct daemon_filter_list; |
| 85 | |
| 86 | uid_t our_uid; |
| 87 | int am_generator = 0; |
| 88 | int local_server = 0; |
| 89 | int daemon_over_rsh = 0; |
| 90 | mode_t orig_umask = 0; |
| 91 | int batch_gen_fd = -1; |
| 92 | int sender_keeps_checksum = 0; |
| 93 | |
| 94 | /* There's probably never more than at most 2 outstanding child processes, |
| 95 | * but set it higher, just in case. */ |
| 96 | #define MAXCHILDPROCS 7 |
| 97 | |
| 98 | #ifdef HAVE_SIGACTION |
| 99 | # ifdef HAVE_SIGPROCMASK |
| 100 | # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n)) |
| 101 | # else |
| 102 | # define SIGACTMASK(n,h) SIGACTION(n,h) |
| 103 | # endif |
| 104 | static struct sigaction sigact; |
| 105 | #endif |
| 106 | |
| 107 | struct pid_status { |
| 108 | pid_t pid; |
| 109 | int status; |
| 110 | } pid_stat_table[MAXCHILDPROCS]; |
| 111 | |
| 112 | static time_t starttime, endtime; |
| 113 | static int64 total_read, total_written; |
| 114 | |
| 115 | static void show_malloc_stats(void); |
| 116 | |
| 117 | /* Works like waitpid(), but if we already harvested the child pid in our |
| 118 | * remember_children(), we succeed instead of returning an error. */ |
| 119 | pid_t wait_process(pid_t pid, int *status_ptr, int flags) |
| 120 | { |
| 121 | pid_t waited_pid; |
| 122 | |
| 123 | do { |
| 124 | waited_pid = waitpid(pid, status_ptr, flags); |
| 125 | } while (waited_pid == -1 && errno == EINTR); |
| 126 | |
| 127 | if (waited_pid == -1 && errno == ECHILD) { |
| 128 | /* Status of requested child no longer available: check to |
| 129 | * see if it was processed by remember_children(). */ |
| 130 | int cnt; |
| 131 | for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { |
| 132 | if (pid == pid_stat_table[cnt].pid) { |
| 133 | *status_ptr = pid_stat_table[cnt].status; |
| 134 | pid_stat_table[cnt].pid = 0; |
| 135 | return pid; |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | return waited_pid; |
| 141 | } |
| 142 | |
| 143 | /* Wait for a process to exit, calling io_flush while waiting. */ |
| 144 | static void wait_process_with_flush(pid_t pid, int *exit_code_ptr) |
| 145 | { |
| 146 | pid_t waited_pid; |
| 147 | int status; |
| 148 | |
| 149 | while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) { |
| 150 | msleep(20); |
| 151 | io_flush(FULL_FLUSH); |
| 152 | } |
| 153 | |
| 154 | /* TODO: If the child exited on a signal, then log an |
| 155 | * appropriate error message. Perhaps we should also accept a |
| 156 | * message describing the purpose of the child. Also indicate |
| 157 | * this to the caller so that they know something went wrong. */ |
| 158 | if (waited_pid < 0) { |
| 159 | rsyserr(FERROR, errno, "waitpid"); |
| 160 | *exit_code_ptr = RERR_WAITCHILD; |
| 161 | } else if (!WIFEXITED(status)) { |
| 162 | #ifdef WCOREDUMP |
| 163 | if (WCOREDUMP(status)) |
| 164 | *exit_code_ptr = RERR_CRASHED; |
| 165 | else |
| 166 | #endif |
| 167 | if (WIFSIGNALED(status)) |
| 168 | *exit_code_ptr = RERR_TERMINATED; |
| 169 | else |
| 170 | *exit_code_ptr = RERR_WAITCHILD; |
| 171 | } else |
| 172 | *exit_code_ptr = WEXITSTATUS(status); |
| 173 | } |
| 174 | |
| 175 | /* This function gets called from all 3 processes. We want the client side |
| 176 | * to actually output the text, but the sender is the only process that has |
| 177 | * all the stats we need. So, if we're a client sender, we do the report. |
| 178 | * If we're a server sender, we write the stats on the supplied fd. If |
| 179 | * we're the client receiver we read the stats from the supplied fd and do |
| 180 | * the report. All processes might also generate a set of debug stats, if |
| 181 | * the verbose level is high enough (this is the only thing that the |
| 182 | * generator process and the server receiver ever do here). */ |
| 183 | static void handle_stats(int f) |
| 184 | { |
| 185 | endtime = time(NULL); |
| 186 | |
| 187 | /* Cache two stats because the read/write code can change it. */ |
| 188 | total_read = stats.total_read; |
| 189 | total_written = stats.total_written; |
| 190 | |
| 191 | if (INFO_GTE(STATS, 3)) { |
| 192 | /* These come out from every process */ |
| 193 | show_malloc_stats(); |
| 194 | show_flist_stats(); |
| 195 | } |
| 196 | |
| 197 | if (am_generator) |
| 198 | return; |
| 199 | |
| 200 | if (am_daemon) { |
| 201 | if (f == -1 || !am_sender) |
| 202 | return; |
| 203 | } |
| 204 | |
| 205 | if (am_server) { |
| 206 | if (am_sender) { |
| 207 | write_varlong30(f, total_read, 3); |
| 208 | write_varlong30(f, total_written, 3); |
| 209 | write_varlong30(f, stats.total_size, 3); |
| 210 | if (protocol_version >= 29) { |
| 211 | write_varlong30(f, stats.flist_buildtime, 3); |
| 212 | write_varlong30(f, stats.flist_xfertime, 3); |
| 213 | } |
| 214 | } |
| 215 | return; |
| 216 | } |
| 217 | |
| 218 | /* this is the client */ |
| 219 | |
| 220 | if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */ |
| 221 | ; |
| 222 | else if (!am_sender) { |
| 223 | /* Read the first two in opposite order because the meaning of |
| 224 | * read/write swaps when switching from sender to receiver. */ |
| 225 | total_written = read_varlong30(f, 3); |
| 226 | total_read = read_varlong30(f, 3); |
| 227 | stats.total_size = read_varlong30(f, 3); |
| 228 | if (protocol_version >= 29) { |
| 229 | stats.flist_buildtime = read_varlong30(f, 3); |
| 230 | stats.flist_xfertime = read_varlong30(f, 3); |
| 231 | } |
| 232 | } else if (write_batch) { |
| 233 | /* The --read-batch process is going to be a client |
| 234 | * receiver, so we need to give it the stats. */ |
| 235 | write_varlong30(batch_fd, total_read, 3); |
| 236 | write_varlong30(batch_fd, total_written, 3); |
| 237 | write_varlong30(batch_fd, stats.total_size, 3); |
| 238 | if (protocol_version >= 29) { |
| 239 | write_varlong30(batch_fd, stats.flist_buildtime, 3); |
| 240 | write_varlong30(batch_fd, stats.flist_xfertime, 3); |
| 241 | } |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | static void output_summary(void) |
| 246 | { |
| 247 | if (INFO_GTE(STATS, 2)) { |
| 248 | rprintf(FCLIENT, "\n"); |
| 249 | rprintf(FINFO,"Number of files: %d\n", stats.num_files); |
| 250 | rprintf(FINFO,"Number of files transferred: %d\n", |
| 251 | stats.num_transferred_files); |
| 252 | rprintf(FINFO,"Total file size: %s bytes\n", |
| 253 | big_num(stats.total_size, human_readable)); |
| 254 | rprintf(FINFO,"Total transferred file size: %s bytes\n", |
| 255 | big_num(stats.total_transferred_size, human_readable)); |
| 256 | rprintf(FINFO,"Literal data: %s bytes\n", |
| 257 | big_num(stats.literal_data, human_readable)); |
| 258 | rprintf(FINFO,"Matched data: %s bytes\n", |
| 259 | big_num(stats.matched_data, human_readable)); |
| 260 | rprintf(FINFO,"File list size: %s\n", |
| 261 | big_num(stats.flist_size, human_readable)); |
| 262 | if (stats.flist_buildtime) { |
| 263 | rprintf(FINFO, |
| 264 | "File list generation time: %.3f seconds\n", |
| 265 | (double)stats.flist_buildtime / 1000); |
| 266 | rprintf(FINFO, |
| 267 | "File list transfer time: %.3f seconds\n", |
| 268 | (double)stats.flist_xfertime / 1000); |
| 269 | } |
| 270 | rprintf(FINFO,"Total bytes sent: %s\n", |
| 271 | big_num(total_written, human_readable)); |
| 272 | rprintf(FINFO,"Total bytes received: %s\n", |
| 273 | big_num(total_read, human_readable)); |
| 274 | } |
| 275 | |
| 276 | if (INFO_GTE(STATS, 1)) { |
| 277 | rprintf(FCLIENT, "\n"); |
| 278 | rprintf(FINFO, |
| 279 | "sent %s bytes received %s bytes %s bytes/sec\n", |
| 280 | big_num(total_written, human_readable), |
| 281 | big_num(total_read, human_readable), |
| 282 | human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2)); |
| 283 | rprintf(FINFO, "total size is %s speedup is %.2f%s\n", |
| 284 | big_num(stats.total_size, human_readable), |
| 285 | (double)stats.total_size / (total_written+total_read), |
| 286 | write_batch < 0 ? " (BATCH ONLY)" : dry_run ? " (DRY RUN)" : ""); |
| 287 | } |
| 288 | |
| 289 | fflush(stdout); |
| 290 | fflush(stderr); |
| 291 | } |
| 292 | |
| 293 | |
| 294 | /** |
| 295 | * If our C library can get malloc statistics, then show them to FINFO |
| 296 | **/ |
| 297 | static void show_malloc_stats(void) |
| 298 | { |
| 299 | #ifdef HAVE_MALLINFO |
| 300 | struct mallinfo mi; |
| 301 | |
| 302 | mi = mallinfo(); |
| 303 | |
| 304 | rprintf(FCLIENT, "\n"); |
| 305 | rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n", |
| 306 | getpid(), am_server ? "server " : "", |
| 307 | am_daemon ? "daemon " : "", who_am_i()); |
| 308 | rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n", |
| 309 | (long)mi.arena); |
| 310 | rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n", |
| 311 | (long)mi.ordblks); |
| 312 | rprintf(FINFO, " smblks: %10ld\n", |
| 313 | (long)mi.smblks); |
| 314 | rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n", |
| 315 | (long)mi.hblks); |
| 316 | rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n", |
| 317 | (long)mi.hblkhd); |
| 318 | rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n", |
| 319 | (long)mi.arena + mi.hblkhd); |
| 320 | rprintf(FINFO, " usmblks: %10ld\n", |
| 321 | (long)mi.usmblks); |
| 322 | rprintf(FINFO, " fsmblks: %10ld\n", |
| 323 | (long)mi.fsmblks); |
| 324 | rprintf(FINFO, " uordblks: %10ld (bytes used)\n", |
| 325 | (long)mi.uordblks); |
| 326 | rprintf(FINFO, " fordblks: %10ld (bytes free)\n", |
| 327 | (long)mi.fordblks); |
| 328 | rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n", |
| 329 | (long)mi.keepcost); |
| 330 | #endif /* HAVE_MALLINFO */ |
| 331 | } |
| 332 | |
| 333 | |
| 334 | /* Start the remote shell. cmd may be NULL to use the default. */ |
| 335 | static pid_t do_cmd(char *cmd, char *machine, char *user, char **remote_argv, int remote_argc, |
| 336 | int *f_in_p, int *f_out_p) |
| 337 | { |
| 338 | int i, argc = 0; |
| 339 | char *args[MAX_ARGS]; |
| 340 | pid_t pid; |
| 341 | int dash_l_set = 0; |
| 342 | |
| 343 | if (!read_batch && !local_server) { |
| 344 | char *t, *f, in_quote = '\0'; |
| 345 | char *rsh_env = getenv(RSYNC_RSH_ENV); |
| 346 | if (!cmd) |
| 347 | cmd = rsh_env; |
| 348 | if (!cmd) |
| 349 | cmd = RSYNC_RSH; |
| 350 | cmd = strdup(cmd); /* MEMORY LEAK */ |
| 351 | if (!cmd) |
| 352 | goto oom; |
| 353 | |
| 354 | for (t = f = cmd; *f; f++) { |
| 355 | if (*f == ' ') |
| 356 | continue; |
| 357 | /* Comparison leaves rooms for server_options(). */ |
| 358 | if (argc >= MAX_ARGS - MAX_SERVER_ARGS) |
| 359 | goto arg_overflow; |
| 360 | args[argc++] = t; |
| 361 | while (*f != ' ' || in_quote) { |
| 362 | if (!*f) { |
| 363 | if (in_quote) { |
| 364 | rprintf(FERROR, |
| 365 | "Missing trailing-%c in remote-shell command.\n", |
| 366 | in_quote); |
| 367 | exit_cleanup(RERR_SYNTAX); |
| 368 | } |
| 369 | f--; |
| 370 | break; |
| 371 | } |
| 372 | if (*f == '\'' || *f == '"') { |
| 373 | if (!in_quote) { |
| 374 | in_quote = *f++; |
| 375 | continue; |
| 376 | } |
| 377 | if (*f == in_quote && *++f != in_quote) { |
| 378 | in_quote = '\0'; |
| 379 | continue; |
| 380 | } |
| 381 | } |
| 382 | *t++ = *f++; |
| 383 | } |
| 384 | *t++ = '\0'; |
| 385 | } |
| 386 | |
| 387 | /* check to see if we've already been given '-l user' in |
| 388 | * the remote-shell command */ |
| 389 | for (i = 0; i < argc-1; i++) { |
| 390 | if (!strcmp(args[i], "-l") && args[i+1][0] != '-') |
| 391 | dash_l_set = 1; |
| 392 | } |
| 393 | |
| 394 | #ifdef HAVE_REMSH |
| 395 | /* remsh (on HPUX) takes the arguments the other way around */ |
| 396 | args[argc++] = machine; |
| 397 | if (user && !(daemon_over_rsh && dash_l_set)) { |
| 398 | args[argc++] = "-l"; |
| 399 | args[argc++] = user; |
| 400 | } |
| 401 | #else |
| 402 | if (user && !(daemon_over_rsh && dash_l_set)) { |
| 403 | args[argc++] = "-l"; |
| 404 | args[argc++] = user; |
| 405 | } |
| 406 | args[argc++] = machine; |
| 407 | #endif |
| 408 | |
| 409 | args[argc++] = rsync_path; |
| 410 | |
| 411 | if (blocking_io < 0) { |
| 412 | char *cp; |
| 413 | if ((cp = strrchr(cmd, '/')) != NULL) |
| 414 | cp++; |
| 415 | else |
| 416 | cp = cmd; |
| 417 | if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0) |
| 418 | blocking_io = 1; |
| 419 | } |
| 420 | |
| 421 | server_options(args,&argc); |
| 422 | |
| 423 | if (argc >= MAX_ARGS - 2) |
| 424 | goto arg_overflow; |
| 425 | } |
| 426 | |
| 427 | args[argc++] = "."; |
| 428 | |
| 429 | if (!daemon_over_rsh) { |
| 430 | while (remote_argc > 0) { |
| 431 | if (argc >= MAX_ARGS - 1) { |
| 432 | arg_overflow: |
| 433 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); |
| 434 | exit_cleanup(RERR_SYNTAX); |
| 435 | } |
| 436 | args[argc++] = *remote_argv++; |
| 437 | remote_argc--; |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | args[argc] = NULL; |
| 442 | |
| 443 | if (DEBUG_GTE(CMD, 2)) { |
| 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) |
| 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 (DEBUG_GTE(RECV, 1)) { |
| 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 | if (daemon_filter_list.head) { |
| 517 | char *slash = strrchr(dest_path, '/'); |
| 518 | if (slash && (slash[1] == '\0' || (slash[1] == '.' && slash[2] == '\0'))) |
| 519 | *slash = '\0'; |
| 520 | else |
| 521 | slash = NULL; |
| 522 | if ((*dest_path != '.' || dest_path[1] != '\0') |
| 523 | && (check_filter(&daemon_filter_list, FLOG, dest_path, 0) < 0 |
| 524 | || check_filter(&daemon_filter_list, FLOG, dest_path, 1) < 0)) { |
| 525 | rprintf(FERROR, "skipping daemon-excluded destination \"%s\"\n", |
| 526 | dest_path); |
| 527 | exit_cleanup(RERR_FILESELECT); |
| 528 | } |
| 529 | if (slash) |
| 530 | *slash = '/'; |
| 531 | } |
| 532 | |
| 533 | /* See what currently exists at the destination. */ |
| 534 | if ((statret = do_stat(dest_path, &st)) == 0) { |
| 535 | /* If the destination is a dir, enter it and use mode 1. */ |
| 536 | if (S_ISDIR(st.st_mode)) { |
| 537 | if (!change_dir(dest_path, CD_NORMAL)) { |
| 538 | rsyserr(FERROR, errno, "change_dir#1 %s failed", |
| 539 | full_fname(dest_path)); |
| 540 | exit_cleanup(RERR_FILESELECT); |
| 541 | } |
| 542 | return NULL; |
| 543 | } |
| 544 | if (file_total > 1) { |
| 545 | rprintf(FERROR, |
| 546 | "ERROR: destination must be a directory when" |
| 547 | " copying more than 1 file\n"); |
| 548 | exit_cleanup(RERR_FILESELECT); |
| 549 | } |
| 550 | if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) { |
| 551 | rprintf(FERROR, |
| 552 | "ERROR: cannot overwrite non-directory" |
| 553 | " with a directory\n"); |
| 554 | exit_cleanup(RERR_FILESELECT); |
| 555 | } |
| 556 | } else if (errno != ENOENT) { |
| 557 | /* If we don't know what's at the destination, fail. */ |
| 558 | rsyserr(FERROR, errno, "ERROR: cannot stat destination %s", |
| 559 | full_fname(dest_path)); |
| 560 | exit_cleanup(RERR_FILESELECT); |
| 561 | } |
| 562 | |
| 563 | cp = strrchr(dest_path, '/'); |
| 564 | |
| 565 | /* If we need a destination directory because the transfer is not |
| 566 | * of a single non-directory or the user has requested one via a |
| 567 | * destination path ending in a slash, create one and use mode 1. */ |
| 568 | if (file_total > 1 || (cp && !cp[1])) { |
| 569 | /* Lop off the final slash (if any). */ |
| 570 | if (cp && !cp[1]) |
| 571 | *cp = '\0'; |
| 572 | |
| 573 | if (statret == 0) { |
| 574 | rprintf(FERROR, |
| 575 | "ERROR: destination path is not a directory\n"); |
| 576 | exit_cleanup(RERR_SYNTAX); |
| 577 | } |
| 578 | |
| 579 | if (mkdir_defmode(dest_path) != 0) { |
| 580 | rsyserr(FERROR, errno, "mkdir %s failed", |
| 581 | full_fname(dest_path)); |
| 582 | exit_cleanup(RERR_FILEIO); |
| 583 | } |
| 584 | |
| 585 | if (flist->high >= flist->low |
| 586 | && strcmp(flist->files[flist->low]->basename, ".") == 0) |
| 587 | flist->files[0]->flags |= FLAG_DIR_CREATED; |
| 588 | |
| 589 | if (INFO_GTE(NAME, 1)) |
| 590 | rprintf(FINFO, "created directory %s\n", dest_path); |
| 591 | |
| 592 | if (dry_run) { |
| 593 | /* Indicate that dest dir doesn't really exist. */ |
| 594 | dry_run++; |
| 595 | } |
| 596 | |
| 597 | if (!change_dir(dest_path, dry_run > 1 ? CD_SKIP_CHDIR : CD_NORMAL)) { |
| 598 | rsyserr(FERROR, errno, "change_dir#2 %s failed", |
| 599 | full_fname(dest_path)); |
| 600 | exit_cleanup(RERR_FILESELECT); |
| 601 | } |
| 602 | |
| 603 | return NULL; |
| 604 | } |
| 605 | |
| 606 | /* Otherwise, we are writing a single file, possibly on top of an |
| 607 | * existing non-directory. Change to the item's parent directory |
| 608 | * (if it has a path component), return the basename of the |
| 609 | * destination file as the local name, and use mode 2. */ |
| 610 | if (!cp) |
| 611 | return dest_path; |
| 612 | |
| 613 | if (cp == dest_path) |
| 614 | dest_path = "/"; |
| 615 | |
| 616 | *cp = '\0'; |
| 617 | if (!change_dir(dest_path, CD_NORMAL)) { |
| 618 | rsyserr(FERROR, errno, "change_dir#3 %s failed", |
| 619 | full_fname(dest_path)); |
| 620 | exit_cleanup(RERR_FILESELECT); |
| 621 | } |
| 622 | *cp = '/'; |
| 623 | |
| 624 | return cp + 1; |
| 625 | } |
| 626 | |
| 627 | /* This function checks on our alternate-basis directories. If we're in |
| 628 | * dry-run mode and the destination dir does not yet exist, we'll try to |
| 629 | * tweak any dest-relative paths to make them work for a dry-run (the |
| 630 | * destination dir must be in curr_dir[] when this function is called). |
| 631 | * We also warn about any arg that is non-existent or not a directory. */ |
| 632 | static void check_alt_basis_dirs(void) |
| 633 | { |
| 634 | STRUCT_STAT st; |
| 635 | char **dir_p, *slash = strrchr(curr_dir, '/'); |
| 636 | |
| 637 | for (dir_p = basis_dir; *dir_p; dir_p++) { |
| 638 | if (dry_run > 1 && **dir_p != '/') { |
| 639 | int len = curr_dir_len + 1 + strlen(*dir_p) + 1; |
| 640 | char *new = new_array(char, len); |
| 641 | if (!new) |
| 642 | out_of_memory("check_alt_basis_dirs"); |
| 643 | if (slash && strncmp(*dir_p, "../", 3) == 0) { |
| 644 | /* We want to remove only one leading "../" prefix for |
| 645 | * the directory we couldn't create in dry-run mode: |
| 646 | * this ensures that any other ".." references get |
| 647 | * evaluated the same as they would for a live copy. */ |
| 648 | *slash = '\0'; |
| 649 | pathjoin(new, len, curr_dir, *dir_p + 3); |
| 650 | *slash = '/'; |
| 651 | } else |
| 652 | pathjoin(new, len, curr_dir, *dir_p); |
| 653 | *dir_p = new; |
| 654 | } |
| 655 | if (do_stat(*dir_p, &st) < 0) { |
| 656 | rprintf(FWARNING, "%s arg does not exist: %s\n", |
| 657 | dest_option, *dir_p); |
| 658 | } else if (!S_ISDIR(st.st_mode)) { |
| 659 | rprintf(FWARNING, "%s arg is not a dir: %s\n", |
| 660 | dest_option, *dir_p); |
| 661 | } |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | /* This is only called by the sender. */ |
| 666 | static void read_final_goodbye(int f_in) |
| 667 | { |
| 668 | int i, iflags, xlen; |
| 669 | uchar fnamecmp_type; |
| 670 | char xname[MAXPATHLEN]; |
| 671 | |
| 672 | if (protocol_version < 29) |
| 673 | i = read_int(f_in); |
| 674 | else { |
| 675 | i = read_ndx_and_attrs(f_in, &iflags, &fnamecmp_type, |
| 676 | xname, &xlen); |
| 677 | } |
| 678 | |
| 679 | if (i != NDX_DONE) { |
| 680 | rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n", |
| 681 | i, who_am_i()); |
| 682 | exit_cleanup(RERR_PROTOCOL); |
| 683 | } |
| 684 | } |
| 685 | |
| 686 | static void do_server_sender(int f_in, int f_out, int argc, char *argv[]) |
| 687 | { |
| 688 | struct file_list *flist; |
| 689 | char *dir = argv[0]; |
| 690 | |
| 691 | if (DEBUG_GTE(SEND, 1)) { |
| 692 | rprintf(FINFO, "server_sender starting pid=%ld\n", |
| 693 | (long)getpid()); |
| 694 | } |
| 695 | |
| 696 | if (am_daemon && lp_write_only(module_id)) { |
| 697 | rprintf(FERROR, "ERROR: module is write only\n"); |
| 698 | exit_cleanup(RERR_SYNTAX); |
| 699 | return; |
| 700 | } |
| 701 | if (am_daemon && lp_read_only(module_id) && remove_source_files) { |
| 702 | rprintf(FERROR, |
| 703 | "ERROR: --remove-%s-files cannot be used with a read-only module\n", |
| 704 | remove_source_files == 1 ? "source" : "sent"); |
| 705 | exit_cleanup(RERR_SYNTAX); |
| 706 | return; |
| 707 | } |
| 708 | |
| 709 | if (!relative_paths) { |
| 710 | if (!change_dir(dir, CD_NORMAL)) { |
| 711 | rsyserr(FERROR, errno, "change_dir#3 %s failed", |
| 712 | full_fname(dir)); |
| 713 | exit_cleanup(RERR_FILESELECT); |
| 714 | } |
| 715 | } |
| 716 | argc--; |
| 717 | argv++; |
| 718 | |
| 719 | if (argc == 0 && (recurse || xfer_dirs || list_only)) { |
| 720 | argc = 1; |
| 721 | argv--; |
| 722 | argv[0] = "."; |
| 723 | } |
| 724 | |
| 725 | flist = send_file_list(f_out,argc,argv); |
| 726 | if (!flist || flist->used == 0) |
| 727 | exit_cleanup(0); |
| 728 | |
| 729 | io_start_buffering_in(f_in); |
| 730 | |
| 731 | send_files(f_in, f_out); |
| 732 | io_flush(FULL_FLUSH); |
| 733 | handle_stats(f_out); |
| 734 | if (protocol_version >= 24) |
| 735 | read_final_goodbye(f_in); |
| 736 | io_flush(FULL_FLUSH); |
| 737 | exit_cleanup(0); |
| 738 | } |
| 739 | |
| 740 | |
| 741 | static int do_recv(int f_in, int f_out, char *local_name) |
| 742 | { |
| 743 | int pid; |
| 744 | int exit_code = 0; |
| 745 | int error_pipe[2]; |
| 746 | |
| 747 | /* The receiving side mustn't obey this, or an existing symlink that |
| 748 | * points to an identical file won't be replaced by the referent. */ |
| 749 | copy_links = copy_dirlinks = copy_unsafe_links = 0; |
| 750 | |
| 751 | #ifdef SUPPORT_HARD_LINKS |
| 752 | if (preserve_hard_links && !inc_recurse) |
| 753 | match_hard_links(first_flist); |
| 754 | #endif |
| 755 | |
| 756 | if (fd_pair(error_pipe) < 0) { |
| 757 | rsyserr(FERROR, errno, "pipe failed in do_recv"); |
| 758 | exit_cleanup(RERR_IPC); |
| 759 | } |
| 760 | |
| 761 | io_flush(NORMAL_FLUSH); |
| 762 | |
| 763 | if ((pid = do_fork()) == -1) { |
| 764 | rsyserr(FERROR, errno, "fork failed in do_recv"); |
| 765 | exit_cleanup(RERR_IPC); |
| 766 | } |
| 767 | |
| 768 | if (pid == 0) { |
| 769 | close(error_pipe[0]); |
| 770 | if (f_in != f_out) |
| 771 | close(f_out); |
| 772 | |
| 773 | /* we can't let two processes write to the socket at one time */ |
| 774 | io_end_multiplex_out(); |
| 775 | |
| 776 | /* set place to send errors */ |
| 777 | set_msg_fd_out(error_pipe[1]); |
| 778 | io_start_buffering_out(error_pipe[1]); |
| 779 | |
| 780 | recv_files(f_in, local_name); |
| 781 | io_flush(FULL_FLUSH); |
| 782 | handle_stats(f_in); |
| 783 | |
| 784 | if (output_needs_newline) { |
| 785 | fputc('\n', stdout); |
| 786 | output_needs_newline = 0; |
| 787 | } |
| 788 | |
| 789 | send_msg(MSG_DONE, "", 1, 0); |
| 790 | write_varlong(error_pipe[1], stats.total_read, 3); |
| 791 | io_flush(FULL_FLUSH); |
| 792 | |
| 793 | /* Handle any keep-alive packets from the post-processing work |
| 794 | * that the generator does. */ |
| 795 | if (protocol_version >= 29) { |
| 796 | int iflags, xlen; |
| 797 | uchar fnamecmp_type; |
| 798 | char xname[MAXPATHLEN]; |
| 799 | |
| 800 | kluge_around_eof = -1; |
| 801 | |
| 802 | /* This should only get stopped via a USR2 signal. */ |
| 803 | read_ndx_and_attrs(f_in, &iflags, &fnamecmp_type, |
| 804 | xname, &xlen); |
| 805 | |
| 806 | rprintf(FERROR, "Invalid packet at end of run [%s]\n", |
| 807 | who_am_i()); |
| 808 | exit_cleanup(RERR_PROTOCOL); |
| 809 | } |
| 810 | |
| 811 | /* Finally, we go to sleep until our parent kills us with a |
| 812 | * USR2 signal. We sleep for a short time, as on some OSes |
| 813 | * a signal won't interrupt a sleep! */ |
| 814 | while (1) |
| 815 | msleep(20); |
| 816 | } |
| 817 | |
| 818 | am_generator = 1; |
| 819 | |
| 820 | io_end_multiplex_in(); |
| 821 | if (write_batch && !am_server) |
| 822 | stop_write_batch(); |
| 823 | |
| 824 | close(error_pipe[1]); |
| 825 | if (f_in != f_out) |
| 826 | close(f_in); |
| 827 | |
| 828 | io_start_buffering_out(f_out); |
| 829 | |
| 830 | set_msg_fd_in(error_pipe[0]); |
| 831 | io_start_buffering_in(error_pipe[0]); |
| 832 | |
| 833 | #ifdef SUPPORT_HARD_LINKS |
| 834 | if (preserve_hard_links && inc_recurse) { |
| 835 | struct file_list *flist; |
| 836 | for (flist = first_flist; flist; flist = flist->next) |
| 837 | match_hard_links(flist); |
| 838 | } |
| 839 | #endif |
| 840 | |
| 841 | generate_files(f_out, local_name); |
| 842 | |
| 843 | handle_stats(-1); |
| 844 | io_flush(FULL_FLUSH); |
| 845 | if (protocol_version >= 24) { |
| 846 | /* send a final goodbye message */ |
| 847 | write_ndx(f_out, NDX_DONE); |
| 848 | } |
| 849 | io_flush(FULL_FLUSH); |
| 850 | |
| 851 | set_msg_fd_in(-1); |
| 852 | kill(pid, SIGUSR2); |
| 853 | wait_process_with_flush(pid, &exit_code); |
| 854 | return exit_code; |
| 855 | } |
| 856 | |
| 857 | static void do_server_recv(int f_in, int f_out, int argc, char *argv[]) |
| 858 | { |
| 859 | int exit_code; |
| 860 | struct file_list *flist; |
| 861 | char *local_name = NULL; |
| 862 | int negated_levels; |
| 863 | |
| 864 | if (filesfrom_fd >= 0 && !msgs2stderr) { |
| 865 | /* We can't mix messages with files-from data on the socket, |
| 866 | * so temporarily turn off info/debug messages. */ |
| 867 | negate_output_levels(); |
| 868 | negated_levels = 1; |
| 869 | } else |
| 870 | negated_levels = 0; |
| 871 | |
| 872 | if (DEBUG_GTE(RECV, 1)) { |
| 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 | |
| 918 | if (negated_levels) |
| 919 | negate_output_levels(); |
| 920 | |
| 921 | if (argc > 0) |
| 922 | local_name = get_local_name(flist,argv[0]); |
| 923 | |
| 924 | /* Now that we know what our destination directory turned out to be, |
| 925 | * we can sanitize the --link-/copy-/compare-dest args correctly. */ |
| 926 | if (sanitize_paths) { |
| 927 | char **dir_p; |
| 928 | for (dir_p = basis_dir; *dir_p; dir_p++) |
| 929 | *dir_p = sanitize_path(NULL, *dir_p, NULL, curr_dir_depth, SP_DEFAULT); |
| 930 | if (partial_dir) |
| 931 | partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, SP_DEFAULT); |
| 932 | } |
| 933 | check_alt_basis_dirs(); |
| 934 | |
| 935 | if (daemon_filter_list.head) { |
| 936 | char **dir_p; |
| 937 | struct filter_list_struct *elp = &daemon_filter_list; |
| 938 | |
| 939 | for (dir_p = basis_dir; *dir_p; dir_p++) { |
| 940 | char *dir = *dir_p; |
| 941 | if (*dir == '/') |
| 942 | dir += module_dirlen; |
| 943 | if (check_filter(elp, FLOG, dir, 1) < 0) |
| 944 | goto options_rejected; |
| 945 | } |
| 946 | if (partial_dir && *partial_dir == '/' |
| 947 | && check_filter(elp, FLOG, partial_dir + module_dirlen, 1) < 0) { |
| 948 | options_rejected: |
| 949 | rprintf(FERROR, |
| 950 | "Your options have been rejected by the server.\n"); |
| 951 | exit_cleanup(RERR_SYNTAX); |
| 952 | } |
| 953 | } |
| 954 | |
| 955 | exit_code = do_recv(f_in, f_out, local_name); |
| 956 | exit_cleanup(exit_code); |
| 957 | } |
| 958 | |
| 959 | |
| 960 | int child_main(int argc, char *argv[]) |
| 961 | { |
| 962 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
| 963 | return 0; |
| 964 | } |
| 965 | |
| 966 | |
| 967 | void start_server(int f_in, int f_out, int argc, char *argv[]) |
| 968 | { |
| 969 | set_nonblocking(f_in); |
| 970 | set_nonblocking(f_out); |
| 971 | |
| 972 | io_set_sock_fds(f_in, f_out); |
| 973 | setup_protocol(f_out, f_in); |
| 974 | |
| 975 | if (protocol_version >= 23) |
| 976 | io_start_multiplex_out(); |
| 977 | |
| 978 | if (am_sender) { |
| 979 | keep_dirlinks = 0; /* Must be disabled on the sender. */ |
| 980 | if (need_messages_from_generator) |
| 981 | io_start_multiplex_in(); |
| 982 | recv_filter_list(f_in); |
| 983 | do_server_sender(f_in, f_out, argc, argv); |
| 984 | } else |
| 985 | do_server_recv(f_in, f_out, argc, argv); |
| 986 | exit_cleanup(0); |
| 987 | } |
| 988 | |
| 989 | |
| 990 | /* |
| 991 | * This is called once the connection has been negotiated. It is used |
| 992 | * for rsyncd, remote-shell, and local connections. |
| 993 | */ |
| 994 | int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[]) |
| 995 | { |
| 996 | struct file_list *flist = NULL; |
| 997 | int exit_code = 0, exit_code2 = 0; |
| 998 | char *local_name = NULL; |
| 999 | |
| 1000 | cleanup_child_pid = pid; |
| 1001 | if (!read_batch) { |
| 1002 | set_nonblocking(f_in); |
| 1003 | set_nonblocking(f_out); |
| 1004 | } |
| 1005 | |
| 1006 | io_set_sock_fds(f_in, f_out); |
| 1007 | setup_protocol(f_out,f_in); |
| 1008 | |
| 1009 | /* We set our stderr file handle to blocking because ssh might have |
| 1010 | * set it to non-blocking. This can be particularly troublesome if |
| 1011 | * stderr is a clone of stdout, because ssh would have set our stdout |
| 1012 | * to non-blocking at the same time (which can easily cause us to lose |
| 1013 | * output from our print statements). This kluge shouldn't cause ssh |
| 1014 | * any problems for how we use it. Note also that we delayed setting |
| 1015 | * this until after the above protocol setup so that we know for sure |
| 1016 | * that ssh is done twiddling its file descriptors. */ |
| 1017 | set_blocking(STDERR_FILENO); |
| 1018 | |
| 1019 | if (am_sender) { |
| 1020 | keep_dirlinks = 0; /* Must be disabled on the sender. */ |
| 1021 | |
| 1022 | if (always_checksum |
| 1023 | && (log_format_has(stdout_format, 'C') |
| 1024 | || log_format_has(logfile_format, 'C'))) |
| 1025 | sender_keeps_checksum = 1; |
| 1026 | |
| 1027 | if (protocol_version >= 30) |
| 1028 | io_start_multiplex_out(); |
| 1029 | else |
| 1030 | io_start_buffering_out(f_out); |
| 1031 | if (!filesfrom_host) |
| 1032 | set_msg_fd_in(f_in); |
| 1033 | send_filter_list(f_out); |
| 1034 | if (filesfrom_host) |
| 1035 | filesfrom_fd = f_in; |
| 1036 | |
| 1037 | if (write_batch && !am_server) |
| 1038 | start_write_batch(f_out); |
| 1039 | flist = send_file_list(f_out, argc, argv); |
| 1040 | set_msg_fd_in(-1); |
| 1041 | if (DEBUG_GTE(FLIST, 3)) |
| 1042 | rprintf(FINFO,"file list sent\n"); |
| 1043 | |
| 1044 | if (protocol_version >= 23) |
| 1045 | io_start_multiplex_in(); |
| 1046 | |
| 1047 | io_flush(NORMAL_FLUSH); |
| 1048 | send_files(f_in, f_out); |
| 1049 | io_flush(FULL_FLUSH); |
| 1050 | handle_stats(-1); |
| 1051 | if (protocol_version >= 24) |
| 1052 | read_final_goodbye(f_in); |
| 1053 | if (pid != -1) { |
| 1054 | if (DEBUG_GTE(EXIT, 2)) |
| 1055 | rprintf(FINFO,"client_run waiting on %d\n", (int) pid); |
| 1056 | io_flush(FULL_FLUSH); |
| 1057 | wait_process_with_flush(pid, &exit_code); |
| 1058 | } |
| 1059 | output_summary(); |
| 1060 | io_flush(FULL_FLUSH); |
| 1061 | exit_cleanup(exit_code); |
| 1062 | } |
| 1063 | |
| 1064 | if (!read_batch) { |
| 1065 | if (protocol_version >= 23) |
| 1066 | io_start_multiplex_in(); |
| 1067 | if (need_messages_from_generator) |
| 1068 | io_start_multiplex_out(); |
| 1069 | } |
| 1070 | |
| 1071 | send_filter_list(read_batch ? -1 : f_out); |
| 1072 | |
| 1073 | if (filesfrom_fd >= 0) { |
| 1074 | io_set_filesfrom_fds(filesfrom_fd, f_out); |
| 1075 | filesfrom_fd = -1; |
| 1076 | } |
| 1077 | |
| 1078 | if (write_batch && !am_server) |
| 1079 | start_write_batch(f_in); |
| 1080 | flist = recv_file_list(f_in); |
| 1081 | if (inc_recurse && file_total == 1) |
| 1082 | recv_additional_file_list(f_in); |
| 1083 | |
| 1084 | if (flist && flist->used > 0) { |
| 1085 | local_name = get_local_name(flist, argv[0]); |
| 1086 | |
| 1087 | check_alt_basis_dirs(); |
| 1088 | |
| 1089 | exit_code2 = do_recv(f_in, f_out, local_name); |
| 1090 | } else { |
| 1091 | handle_stats(-1); |
| 1092 | output_summary(); |
| 1093 | } |
| 1094 | |
| 1095 | if (pid != -1) { |
| 1096 | if (DEBUG_GTE(RECV, 1)) |
| 1097 | rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid); |
| 1098 | io_flush(FULL_FLUSH); |
| 1099 | wait_process_with_flush(pid, &exit_code); |
| 1100 | } |
| 1101 | |
| 1102 | return MAX(exit_code, exit_code2); |
| 1103 | } |
| 1104 | |
| 1105 | static int copy_argv(char *argv[]) |
| 1106 | { |
| 1107 | int i; |
| 1108 | |
| 1109 | for (i = 0; argv[i]; i++) { |
| 1110 | if (!(argv[i] = strdup(argv[i]))) { |
| 1111 | rprintf (FERROR, "out of memory at %s(%d)\n", |
| 1112 | __FILE__, __LINE__); |
| 1113 | return RERR_MALLOC; |
| 1114 | } |
| 1115 | } |
| 1116 | |
| 1117 | return 0; |
| 1118 | } |
| 1119 | |
| 1120 | |
| 1121 | /** |
| 1122 | * Start a client for either type of remote connection. Work out |
| 1123 | * whether the arguments request a remote shell or rsyncd connection, |
| 1124 | * and call the appropriate connection function, then run_client. |
| 1125 | * |
| 1126 | * Calls either start_socket_client (for sockets) or do_cmd and |
| 1127 | * client_run (for ssh). |
| 1128 | **/ |
| 1129 | static int start_client(int argc, char *argv[]) |
| 1130 | { |
| 1131 | char *p, *shell_machine = NULL, *shell_user = NULL; |
| 1132 | char **remote_argv; |
| 1133 | int remote_argc; |
| 1134 | int f_in, f_out; |
| 1135 | int ret; |
| 1136 | pid_t pid; |
| 1137 | |
| 1138 | /* Don't clobber argv[] so that ps(1) can still show the right |
| 1139 | * command line. */ |
| 1140 | if ((ret = copy_argv(argv)) != 0) |
| 1141 | return ret; |
| 1142 | |
| 1143 | if (!read_batch) { /* for read_batch, NO source is specified */ |
| 1144 | char *path = check_for_hostspec(argv[0], &shell_machine, &rsync_port); |
| 1145 | if (path) { /* source is remote */ |
| 1146 | char *dummy_host; |
| 1147 | int dummy_port = 0; |
| 1148 | *argv = path; |
| 1149 | remote_argv = argv; |
| 1150 | remote_argc = argc; |
| 1151 | argv += argc - 1; |
| 1152 | if (argc == 1 || **argv == ':') |
| 1153 | argc = 0; /* no dest arg */ |
| 1154 | else if (check_for_hostspec(*argv, &dummy_host, &dummy_port)) { |
| 1155 | rprintf(FERROR, |
| 1156 | "The source and destination cannot both be remote.\n"); |
| 1157 | exit_cleanup(RERR_SYNTAX); |
| 1158 | } else { |
| 1159 | remote_argc--; /* don't count dest */ |
| 1160 | argc = 1; |
| 1161 | } |
| 1162 | if (filesfrom_host && *filesfrom_host |
| 1163 | && strcmp(filesfrom_host, shell_machine) != 0) { |
| 1164 | rprintf(FERROR, |
| 1165 | "--files-from hostname is not the same as the transfer hostname\n"); |
| 1166 | exit_cleanup(RERR_SYNTAX); |
| 1167 | } |
| 1168 | am_sender = 0; |
| 1169 | if (rsync_port) |
| 1170 | daemon_over_rsh = shell_cmd ? 1 : -1; |
| 1171 | } else { /* source is local, check dest arg */ |
| 1172 | am_sender = 1; |
| 1173 | |
| 1174 | if (argc > 1) { |
| 1175 | p = argv[--argc]; |
| 1176 | remote_argv = argv + argc; |
| 1177 | } else { |
| 1178 | static char *dotarg[1] = { "." }; |
| 1179 | p = dotarg[0]; |
| 1180 | remote_argv = dotarg; |
| 1181 | } |
| 1182 | remote_argc = 1; |
| 1183 | |
| 1184 | path = check_for_hostspec(p, &shell_machine, &rsync_port); |
| 1185 | if (path && filesfrom_host && *filesfrom_host |
| 1186 | && strcmp(filesfrom_host, shell_machine) != 0) { |
| 1187 | rprintf(FERROR, |
| 1188 | "--files-from hostname is not the same as the transfer hostname\n"); |
| 1189 | exit_cleanup(RERR_SYNTAX); |
| 1190 | } |
| 1191 | if (!path) { /* no hostspec found, so src & dest are local */ |
| 1192 | local_server = 1; |
| 1193 | if (filesfrom_host) { |
| 1194 | rprintf(FERROR, |
| 1195 | "--files-from cannot be remote when the transfer is local\n"); |
| 1196 | exit_cleanup(RERR_SYNTAX); |
| 1197 | } |
| 1198 | shell_machine = NULL; |
| 1199 | } else { /* hostspec was found, so dest is remote */ |
| 1200 | argv[argc] = path; |
| 1201 | if (rsync_port) |
| 1202 | daemon_over_rsh = shell_cmd ? 1 : -1; |
| 1203 | } |
| 1204 | } |
| 1205 | } else { /* read_batch */ |
| 1206 | local_server = 1; |
| 1207 | if (check_for_hostspec(argv[argc-1], &shell_machine, &rsync_port)) { |
| 1208 | rprintf(FERROR, "remote destination is not allowed with --read-batch\n"); |
| 1209 | exit_cleanup(RERR_SYNTAX); |
| 1210 | } |
| 1211 | remote_argv = argv + argc - 1; |
| 1212 | remote_argc = 1; |
| 1213 | } |
| 1214 | |
| 1215 | if (am_sender) { |
| 1216 | char *dummy_host; |
| 1217 | int dummy_port = rsync_port; |
| 1218 | int i; |
| 1219 | /* For local source, extra source args must not have hostspec. */ |
| 1220 | for (i = 1; i < argc; i++) { |
| 1221 | if (check_for_hostspec(argv[i], &dummy_host, &dummy_port)) { |
| 1222 | rprintf(FERROR, "Unexpected remote arg: %s\n", argv[i]); |
| 1223 | exit_cleanup(RERR_SYNTAX); |
| 1224 | } |
| 1225 | } |
| 1226 | } else { |
| 1227 | char *dummy_host; |
| 1228 | int dummy_port = rsync_port; |
| 1229 | int i; |
| 1230 | /* For remote source, any extra source args must have either |
| 1231 | * the same hostname or an empty hostname. */ |
| 1232 | for (i = 1; i < remote_argc; i++) { |
| 1233 | char *arg = check_for_hostspec(remote_argv[i], &dummy_host, &dummy_port); |
| 1234 | if (!arg) { |
| 1235 | rprintf(FERROR, "Unexpected local arg: %s\n", remote_argv[i]); |
| 1236 | rprintf(FERROR, "If arg is a remote file/dir, prefix it with a colon (:).\n"); |
| 1237 | exit_cleanup(RERR_SYNTAX); |
| 1238 | } |
| 1239 | if (*dummy_host && strcmp(dummy_host, shell_machine) != 0) { |
| 1240 | rprintf(FERROR, "All source args must come from the same machine.\n"); |
| 1241 | exit_cleanup(RERR_SYNTAX); |
| 1242 | } |
| 1243 | if (rsync_port != dummy_port) { |
| 1244 | if (!rsync_port || !dummy_port) |
| 1245 | rprintf(FERROR, "All source args must use the same hostspec format.\n"); |
| 1246 | else |
| 1247 | rprintf(FERROR, "All source args must use the same port number.\n"); |
| 1248 | exit_cleanup(RERR_SYNTAX); |
| 1249 | } |
| 1250 | remote_argv[i] = arg; |
| 1251 | } |
| 1252 | } |
| 1253 | |
| 1254 | if (daemon_over_rsh < 0) |
| 1255 | return start_socket_client(shell_machine, remote_argc, remote_argv, argc, argv); |
| 1256 | |
| 1257 | if (password_file && !daemon_over_rsh) { |
| 1258 | rprintf(FERROR, "The --password-file option may only be " |
| 1259 | "used when accessing an rsync daemon.\n"); |
| 1260 | exit_cleanup(RERR_SYNTAX); |
| 1261 | } |
| 1262 | |
| 1263 | if (connect_timeout) { |
| 1264 | rprintf(FERROR, "The --contimeout option may only be " |
| 1265 | "used when connecting to an rsync daemon.\n"); |
| 1266 | exit_cleanup(RERR_SYNTAX); |
| 1267 | } |
| 1268 | |
| 1269 | if (shell_machine) { |
| 1270 | p = strrchr(shell_machine,'@'); |
| 1271 | if (p) { |
| 1272 | *p = 0; |
| 1273 | shell_user = shell_machine; |
| 1274 | shell_machine = p+1; |
| 1275 | } |
| 1276 | } |
| 1277 | |
| 1278 | if (DEBUG_GTE(CMD, 2)) { |
| 1279 | rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n", |
| 1280 | NS(shell_cmd), NS(shell_machine), NS(shell_user), |
| 1281 | remote_argv ? NS(remote_argv[0]) : ""); |
| 1282 | } |
| 1283 | |
| 1284 | pid = do_cmd(shell_cmd, shell_machine, shell_user, remote_argv, remote_argc, |
| 1285 | &f_in, &f_out); |
| 1286 | |
| 1287 | /* if we're running an rsync server on the remote host over a |
| 1288 | * remote shell command, we need to do the RSYNCD protocol first */ |
| 1289 | if (daemon_over_rsh) { |
| 1290 | int tmpret; |
| 1291 | tmpret = start_inband_exchange(f_in, f_out, shell_user, remote_argc, remote_argv); |
| 1292 | if (tmpret < 0) |
| 1293 | return tmpret; |
| 1294 | } |
| 1295 | |
| 1296 | ret = client_run(f_in, f_out, pid, argc, argv); |
| 1297 | |
| 1298 | fflush(stdout); |
| 1299 | fflush(stderr); |
| 1300 | |
| 1301 | return ret; |
| 1302 | } |
| 1303 | |
| 1304 | |
| 1305 | static RETSIGTYPE sigusr1_handler(UNUSED(int val)) |
| 1306 | { |
| 1307 | exit_cleanup(RERR_SIGNAL1); |
| 1308 | } |
| 1309 | |
| 1310 | static RETSIGTYPE sigusr2_handler(UNUSED(int val)) |
| 1311 | { |
| 1312 | if (!am_server) |
| 1313 | output_summary(); |
| 1314 | close_all(); |
| 1315 | if (got_xfer_error) |
| 1316 | _exit(RERR_PARTIAL); |
| 1317 | _exit(0); |
| 1318 | } |
| 1319 | |
| 1320 | RETSIGTYPE remember_children(UNUSED(int val)) |
| 1321 | { |
| 1322 | #ifdef WNOHANG |
| 1323 | int cnt, status; |
| 1324 | pid_t pid; |
| 1325 | /* An empty waitpid() loop was put here by Tridge and we could never |
| 1326 | * get him to explain why he put it in, so rather than taking it |
| 1327 | * out we're instead saving the child exit statuses for later use. |
| 1328 | * The waitpid() loop presumably eliminates all possibility of leaving |
| 1329 | * zombie children, maybe that's why he did it. */ |
| 1330 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) { |
| 1331 | /* save the child's exit status */ |
| 1332 | for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { |
| 1333 | if (pid_stat_table[cnt].pid == 0) { |
| 1334 | pid_stat_table[cnt].pid = pid; |
| 1335 | pid_stat_table[cnt].status = status; |
| 1336 | break; |
| 1337 | } |
| 1338 | } |
| 1339 | } |
| 1340 | #endif |
| 1341 | #ifndef HAVE_SIGACTION |
| 1342 | signal(SIGCHLD, remember_children); |
| 1343 | #endif |
| 1344 | } |
| 1345 | |
| 1346 | |
| 1347 | /** |
| 1348 | * This routine catches signals and tries to send them to gdb. |
| 1349 | * |
| 1350 | * Because it's called from inside a signal handler it ought not to |
| 1351 | * use too many library routines. |
| 1352 | * |
| 1353 | * @todo Perhaps use "screen -X" instead/as well, to help people |
| 1354 | * debugging without easy access to X. Perhaps use an environment |
| 1355 | * variable, or just call a script? |
| 1356 | * |
| 1357 | * @todo The /proc/ magic probably only works on Linux (and |
| 1358 | * Solaris?) Can we be more portable? |
| 1359 | **/ |
| 1360 | #ifdef MAINTAINER_MODE |
| 1361 | const char *get_panic_action(void) |
| 1362 | { |
| 1363 | const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION"); |
| 1364 | |
| 1365 | if (cmd_fmt) |
| 1366 | return cmd_fmt; |
| 1367 | else |
| 1368 | return "xterm -display :0 -T Panic -n Panic " |
| 1369 | "-e gdb /proc/%d/exe %d"; |
| 1370 | } |
| 1371 | |
| 1372 | |
| 1373 | /** |
| 1374 | * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION. |
| 1375 | * |
| 1376 | * This signal handler is only installed if we were configured with |
| 1377 | * --enable-maintainer-mode. Perhaps it should always be on and we |
| 1378 | * should just look at the environment variable, but I'm a bit leery |
| 1379 | * of a signal sending us into a busy loop. |
| 1380 | **/ |
| 1381 | static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig)) |
| 1382 | { |
| 1383 | char cmd_buf[300]; |
| 1384 | int ret; |
| 1385 | |
| 1386 | snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(), |
| 1387 | getpid(), getpid()); |
| 1388 | |
| 1389 | /* Unless we failed to execute gdb, we allow the process to |
| 1390 | * continue. I'm not sure if that's right. */ |
| 1391 | ret = system(cmd_buf); |
| 1392 | if (ret) |
| 1393 | _exit(ret); |
| 1394 | } |
| 1395 | #endif |
| 1396 | |
| 1397 | |
| 1398 | int main(int argc,char *argv[]) |
| 1399 | { |
| 1400 | int ret; |
| 1401 | int orig_argc = argc; |
| 1402 | char **orig_argv = argv; |
| 1403 | #ifdef HAVE_SIGACTION |
| 1404 | # ifdef HAVE_SIGPROCMASK |
| 1405 | sigset_t sigmask; |
| 1406 | |
| 1407 | sigemptyset(&sigmask); |
| 1408 | # endif |
| 1409 | sigact.sa_flags = SA_NOCLDSTOP; |
| 1410 | #endif |
| 1411 | SIGACTMASK(SIGUSR1, sigusr1_handler); |
| 1412 | SIGACTMASK(SIGUSR2, sigusr2_handler); |
| 1413 | SIGACTMASK(SIGCHLD, remember_children); |
| 1414 | #ifdef MAINTAINER_MODE |
| 1415 | SIGACTMASK(SIGSEGV, rsync_panic_handler); |
| 1416 | SIGACTMASK(SIGFPE, rsync_panic_handler); |
| 1417 | SIGACTMASK(SIGABRT, rsync_panic_handler); |
| 1418 | SIGACTMASK(SIGBUS, rsync_panic_handler); |
| 1419 | #endif |
| 1420 | |
| 1421 | starttime = time(NULL); |
| 1422 | our_uid = MY_UID(); |
| 1423 | am_root = our_uid == 0; |
| 1424 | |
| 1425 | memset(&stats, 0, sizeof(stats)); |
| 1426 | |
| 1427 | if (argc < 2) { |
| 1428 | usage(FERROR); |
| 1429 | exit_cleanup(RERR_SYNTAX); |
| 1430 | } |
| 1431 | |
| 1432 | /* we set a 0 umask so that correct file permissions can be |
| 1433 | * carried across */ |
| 1434 | orig_umask = umask(0); |
| 1435 | |
| 1436 | #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE |
| 1437 | setlocale(LC_CTYPE, ""); |
| 1438 | #endif |
| 1439 | |
| 1440 | if (!parse_arguments(&argc, (const char ***) &argv)) { |
| 1441 | /* FIXME: We ought to call the same error-handling |
| 1442 | * code here, rather than relying on getopt. */ |
| 1443 | option_error(); |
| 1444 | exit_cleanup(RERR_SYNTAX); |
| 1445 | } |
| 1446 | |
| 1447 | SIGACTMASK(SIGINT, sig_int); |
| 1448 | SIGACTMASK(SIGHUP, sig_int); |
| 1449 | SIGACTMASK(SIGTERM, sig_int); |
| 1450 | #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK |
| 1451 | sigprocmask(SIG_UNBLOCK, &sigmask, NULL); |
| 1452 | #endif |
| 1453 | |
| 1454 | /* Ignore SIGPIPE; we consistently check error codes and will |
| 1455 | * see the EPIPE. */ |
| 1456 | SIGACTION(SIGPIPE, SIG_IGN); |
| 1457 | #ifdef SIGXFSZ |
| 1458 | SIGACTION(SIGXFSZ, SIG_IGN); |
| 1459 | #endif |
| 1460 | |
| 1461 | /* Initialize change_dir() here because on some old systems getcwd |
| 1462 | * (implemented by forking "pwd" and reading its output) doesn't |
| 1463 | * work when there are other child processes. Also, on all systems |
| 1464 | * that implement getcwd that way "pwd" can't be found after chroot. */ |
| 1465 | change_dir(NULL, CD_NORMAL); |
| 1466 | |
| 1467 | init_flist(); |
| 1468 | |
| 1469 | if ((write_batch || read_batch) && !am_server) { |
| 1470 | if (write_batch) |
| 1471 | write_batch_shell_file(orig_argc, orig_argv, argc); |
| 1472 | |
| 1473 | if (read_batch && strcmp(batch_name, "-") == 0) |
| 1474 | batch_fd = STDIN_FILENO; |
| 1475 | else { |
| 1476 | batch_fd = do_open(batch_name, |
| 1477 | write_batch ? O_WRONLY | O_CREAT | O_TRUNC |
| 1478 | : O_RDONLY, S_IRUSR | S_IWUSR); |
| 1479 | } |
| 1480 | if (batch_fd < 0) { |
| 1481 | rsyserr(FERROR, errno, "Batch file %s open error", |
| 1482 | full_fname(batch_name)); |
| 1483 | exit_cleanup(RERR_FILEIO); |
| 1484 | } |
| 1485 | if (read_batch) |
| 1486 | read_stream_flags(batch_fd); |
| 1487 | else |
| 1488 | write_stream_flags(batch_fd); |
| 1489 | } |
| 1490 | if (write_batch < 0) |
| 1491 | dry_run = 1; |
| 1492 | |
| 1493 | if (am_server) { |
| 1494 | #ifdef ICONV_CONST |
| 1495 | setup_iconv(); |
| 1496 | #endif |
| 1497 | } else if (am_daemon) |
| 1498 | return daemon_main(); |
| 1499 | |
| 1500 | if (am_server && protect_args) { |
| 1501 | char buf[MAXPATHLEN]; |
| 1502 | protect_args = 2; |
| 1503 | read_args(STDIN_FILENO, NULL, buf, sizeof buf, 1, &argv, &argc, NULL); |
| 1504 | if (!parse_arguments(&argc, (const char ***) &argv)) { |
| 1505 | option_error(); |
| 1506 | exit_cleanup(RERR_SYNTAX); |
| 1507 | } |
| 1508 | } |
| 1509 | |
| 1510 | if (argc < 1) { |
| 1511 | usage(FERROR); |
| 1512 | exit_cleanup(RERR_SYNTAX); |
| 1513 | } |
| 1514 | |
| 1515 | if (am_server) { |
| 1516 | set_nonblocking(STDIN_FILENO); |
| 1517 | set_nonblocking(STDOUT_FILENO); |
| 1518 | if (am_daemon) |
| 1519 | return start_daemon(STDIN_FILENO, STDOUT_FILENO); |
| 1520 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
| 1521 | } |
| 1522 | |
| 1523 | ret = start_client(argc, argv); |
| 1524 | if (ret == -1) |
| 1525 | exit_cleanup(RERR_STARTCLIENT); |
| 1526 | else |
| 1527 | exit_cleanup(ret); |
| 1528 | |
| 1529 | return ret; |
| 1530 | } |