| 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, 2004, 2005, 2006 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 2 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, write to the Free Software Foundation, Inc., |
| 21 | * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. |
| 22 | */ |
| 23 | |
| 24 | #include "rsync.h" |
| 25 | #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H |
| 26 | #include <locale.h> |
| 27 | #endif |
| 28 | |
| 29 | extern int verbose; |
| 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_generator; |
| 36 | extern int am_daemon; |
| 37 | extern int blocking_io; |
| 38 | extern int remove_source_files; |
| 39 | extern int daemon_over_rsh; |
| 40 | extern int need_messages_from_generator; |
| 41 | extern int kluge_around_eof; |
| 42 | extern int do_stats; |
| 43 | extern int log_got_error; |
| 44 | extern int module_id; |
| 45 | extern int copy_links; |
| 46 | extern int copy_dirlinks; |
| 47 | extern int keep_dirlinks; |
| 48 | extern int preserve_hard_links; |
| 49 | extern int protocol_version; |
| 50 | extern int recurse; |
| 51 | extern int relative_paths; |
| 52 | extern int sanitize_paths; |
| 53 | extern int curr_dir_depth; |
| 54 | extern int curr_dir_len; |
| 55 | extern int module_id; |
| 56 | extern int rsync_port; |
| 57 | extern int whole_file; |
| 58 | extern int read_batch; |
| 59 | extern int write_batch; |
| 60 | extern int batch_fd; |
| 61 | extern int batch_gen_fd; |
| 62 | extern int filesfrom_fd; |
| 63 | extern pid_t cleanup_child_pid; |
| 64 | extern struct stats stats; |
| 65 | extern char *filesfrom_host; |
| 66 | extern char *partial_dir; |
| 67 | extern char *basis_dir[]; |
| 68 | extern char *rsync_path; |
| 69 | extern char *shell_cmd; |
| 70 | extern char *batch_name; |
| 71 | extern char curr_dir[MAXPATHLEN]; |
| 72 | extern struct filter_list_struct server_filter_list; |
| 73 | |
| 74 | int local_server = 0; |
| 75 | int new_root_dir = 0; |
| 76 | mode_t orig_umask = 0; |
| 77 | struct file_list *the_file_list; |
| 78 | |
| 79 | /* There's probably never more than at most 2 outstanding child processes, |
| 80 | * but set it higher, just in case. */ |
| 81 | #define MAXCHILDPROCS 7 |
| 82 | |
| 83 | #ifdef HAVE_SIGACTION |
| 84 | # ifdef HAVE_SIGPROCMASK |
| 85 | # define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n)) |
| 86 | # else |
| 87 | # define SIGACTMASK(n,h) SIGACTION(n,h) |
| 88 | # endif |
| 89 | static struct sigaction sigact; |
| 90 | #endif |
| 91 | |
| 92 | struct pid_status { |
| 93 | pid_t pid; |
| 94 | int status; |
| 95 | } pid_stat_table[MAXCHILDPROCS]; |
| 96 | |
| 97 | static time_t starttime, endtime; |
| 98 | static int64 total_read, total_written; |
| 99 | |
| 100 | static void show_malloc_stats(void); |
| 101 | |
| 102 | /* Works like waitpid(), but if we already harvested the child pid in our |
| 103 | * remember_children(), we succeed instead of returning an error. */ |
| 104 | pid_t wait_process(pid_t pid, int *status_ptr, int flags) |
| 105 | { |
| 106 | pid_t waited_pid = waitpid(pid, status_ptr, flags); |
| 107 | |
| 108 | if (waited_pid == -1 && errno == ECHILD) { |
| 109 | /* Status of requested child no longer available: check to |
| 110 | * see if it was processed by remember_children(). */ |
| 111 | int cnt; |
| 112 | for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { |
| 113 | if (pid == pid_stat_table[cnt].pid) { |
| 114 | *status_ptr = pid_stat_table[cnt].status; |
| 115 | pid_stat_table[cnt].pid = 0; |
| 116 | return pid; |
| 117 | } |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | return waited_pid; |
| 122 | } |
| 123 | |
| 124 | /* Wait for a process to exit, calling io_flush while waiting. */ |
| 125 | static void wait_process_with_flush(pid_t pid, int *exit_code_ptr) |
| 126 | { |
| 127 | pid_t waited_pid; |
| 128 | int status; |
| 129 | |
| 130 | while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) { |
| 131 | msleep(20); |
| 132 | io_flush(FULL_FLUSH); |
| 133 | } |
| 134 | |
| 135 | /* TODO: If the child exited on a signal, then log an |
| 136 | * appropriate error message. Perhaps we should also accept a |
| 137 | * message describing the purpose of the child. Also indicate |
| 138 | * this to the caller so that they know something went wrong. */ |
| 139 | if (waited_pid < 0) { |
| 140 | rsyserr(FERROR, errno, "waitpid"); |
| 141 | *exit_code_ptr = RERR_WAITCHILD; |
| 142 | } else if (!WIFEXITED(status)) { |
| 143 | #ifdef WCOREDUMP |
| 144 | if (WCOREDUMP(status)) |
| 145 | *exit_code_ptr = RERR_CRASHED; |
| 146 | else |
| 147 | #endif |
| 148 | if (WIFSIGNALED(status)) |
| 149 | *exit_code_ptr = RERR_TERMINATED; |
| 150 | else |
| 151 | *exit_code_ptr = RERR_WAITCHILD; |
| 152 | } else |
| 153 | *exit_code_ptr = WEXITSTATUS(status); |
| 154 | } |
| 155 | |
| 156 | /* This function gets called from all 3 processes. We want the client side |
| 157 | * to actually output the text, but the sender is the only process that has |
| 158 | * all the stats we need. So, if we're a client sender, we do the report. |
| 159 | * If we're a server sender, we write the stats on the supplied fd. If |
| 160 | * we're the client receiver we read the stats from the supplied fd and do |
| 161 | * the report. All processes might also generate a set of debug stats, if |
| 162 | * the verbose level is high enough (this is the only thing that the |
| 163 | * generator process and the server receiver ever do here). */ |
| 164 | static void handle_stats(int f) |
| 165 | { |
| 166 | endtime = time(NULL); |
| 167 | |
| 168 | /* Cache two stats because the read/write code can change it. */ |
| 169 | total_read = stats.total_read; |
| 170 | total_written = stats.total_written; |
| 171 | |
| 172 | if (do_stats && verbose > 1) { |
| 173 | /* These come out from every process */ |
| 174 | show_malloc_stats(); |
| 175 | show_flist_stats(); |
| 176 | } |
| 177 | |
| 178 | if (am_generator) |
| 179 | return; |
| 180 | |
| 181 | if (am_daemon) { |
| 182 | if (f == -1 || !am_sender) |
| 183 | return; |
| 184 | } |
| 185 | |
| 186 | if (am_server) { |
| 187 | if (am_sender) { |
| 188 | write_longint(f, total_read); |
| 189 | write_longint(f, total_written); |
| 190 | write_longint(f, stats.total_size); |
| 191 | if (protocol_version >= 29) { |
| 192 | write_longint(f, stats.flist_buildtime); |
| 193 | write_longint(f, stats.flist_xfertime); |
| 194 | } |
| 195 | } |
| 196 | return; |
| 197 | } |
| 198 | |
| 199 | /* this is the client */ |
| 200 | |
| 201 | if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */ |
| 202 | ; |
| 203 | else if (!am_sender) { |
| 204 | /* Read the first two in opposite order because the meaning of |
| 205 | * read/write swaps when switching from sender to receiver. */ |
| 206 | total_written = read_longint(f); |
| 207 | total_read = read_longint(f); |
| 208 | stats.total_size = read_longint(f); |
| 209 | if (protocol_version >= 29) { |
| 210 | stats.flist_buildtime = read_longint(f); |
| 211 | stats.flist_xfertime = read_longint(f); |
| 212 | } |
| 213 | } else if (write_batch) { |
| 214 | /* The --read-batch process is going to be a client |
| 215 | * receiver, so we need to give it the stats. */ |
| 216 | write_longint(batch_fd, total_read); |
| 217 | write_longint(batch_fd, total_written); |
| 218 | write_longint(batch_fd, stats.total_size); |
| 219 | if (protocol_version >= 29) { |
| 220 | write_longint(batch_fd, stats.flist_buildtime); |
| 221 | write_longint(batch_fd, stats.flist_xfertime); |
| 222 | } |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | static void output_summary(void) |
| 227 | { |
| 228 | if (do_stats) { |
| 229 | rprintf(FCLIENT, "\n"); |
| 230 | rprintf(FINFO,"Number of files: %d\n", stats.num_files); |
| 231 | rprintf(FINFO,"Number of files transferred: %d\n", |
| 232 | stats.num_transferred_files); |
| 233 | rprintf(FINFO,"Total file size: %s bytes\n", |
| 234 | human_num(stats.total_size)); |
| 235 | rprintf(FINFO,"Total transferred file size: %s bytes\n", |
| 236 | human_num(stats.total_transferred_size)); |
| 237 | rprintf(FINFO,"Literal data: %s bytes\n", |
| 238 | human_num(stats.literal_data)); |
| 239 | rprintf(FINFO,"Matched data: %s bytes\n", |
| 240 | human_num(stats.matched_data)); |
| 241 | rprintf(FINFO,"File list size: %d\n", stats.flist_size); |
| 242 | if (stats.flist_buildtime) { |
| 243 | rprintf(FINFO, |
| 244 | "File list generation time: %.3f seconds\n", |
| 245 | (double)stats.flist_buildtime / 1000); |
| 246 | rprintf(FINFO, |
| 247 | "File list transfer time: %.3f seconds\n", |
| 248 | (double)stats.flist_xfertime / 1000); |
| 249 | } |
| 250 | rprintf(FINFO,"Total bytes sent: %s\n", |
| 251 | human_num(total_written)); |
| 252 | rprintf(FINFO,"Total bytes received: %s\n", |
| 253 | human_num(total_read)); |
| 254 | } |
| 255 | |
| 256 | if (verbose || do_stats) { |
| 257 | rprintf(FCLIENT, "\n"); |
| 258 | rprintf(FINFO, |
| 259 | "sent %s bytes received %s bytes %s bytes/sec\n", |
| 260 | human_num(total_written), human_num(total_read), |
| 261 | human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2)); |
| 262 | rprintf(FINFO, "total size is %s speedup is %.2f\n", |
| 263 | human_num(stats.total_size), |
| 264 | (double)stats.total_size / (total_written+total_read)); |
| 265 | } |
| 266 | |
| 267 | fflush(stdout); |
| 268 | fflush(stderr); |
| 269 | } |
| 270 | |
| 271 | |
| 272 | /** |
| 273 | * If our C library can get malloc statistics, then show them to FINFO |
| 274 | **/ |
| 275 | static void show_malloc_stats(void) |
| 276 | { |
| 277 | #ifdef HAVE_MALLINFO |
| 278 | struct mallinfo mi; |
| 279 | |
| 280 | mi = mallinfo(); |
| 281 | |
| 282 | rprintf(FCLIENT, "\n"); |
| 283 | rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n", |
| 284 | getpid(), am_server ? "server " : "", |
| 285 | am_daemon ? "daemon " : "", who_am_i()); |
| 286 | rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n", |
| 287 | (long)mi.arena); |
| 288 | rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n", |
| 289 | (long)mi.ordblks); |
| 290 | rprintf(FINFO, " smblks: %10ld\n", |
| 291 | (long)mi.smblks); |
| 292 | rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n", |
| 293 | (long)mi.hblks); |
| 294 | rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n", |
| 295 | (long)mi.hblkhd); |
| 296 | rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n", |
| 297 | (long)mi.arena + mi.hblkhd); |
| 298 | rprintf(FINFO, " usmblks: %10ld\n", |
| 299 | (long)mi.usmblks); |
| 300 | rprintf(FINFO, " fsmblks: %10ld\n", |
| 301 | (long)mi.fsmblks); |
| 302 | rprintf(FINFO, " uordblks: %10ld (bytes used)\n", |
| 303 | (long)mi.uordblks); |
| 304 | rprintf(FINFO, " fordblks: %10ld (bytes free)\n", |
| 305 | (long)mi.fordblks); |
| 306 | rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n", |
| 307 | (long)mi.keepcost); |
| 308 | #endif /* HAVE_MALLINFO */ |
| 309 | } |
| 310 | |
| 311 | |
| 312 | /* Start the remote shell. cmd may be NULL to use the default. */ |
| 313 | static pid_t do_cmd(char *cmd, char *machine, char *user, char *path, |
| 314 | int *f_in, int *f_out) |
| 315 | { |
| 316 | int i, argc = 0; |
| 317 | char *args[MAX_ARGS]; |
| 318 | pid_t ret; |
| 319 | char *dir = NULL; |
| 320 | int dash_l_set = 0; |
| 321 | |
| 322 | if (!read_batch && !local_server) { |
| 323 | char *t, *f, in_quote = '\0'; |
| 324 | char *rsh_env = getenv(RSYNC_RSH_ENV); |
| 325 | if (!cmd) |
| 326 | cmd = rsh_env; |
| 327 | if (!cmd) |
| 328 | cmd = RSYNC_RSH; |
| 329 | cmd = strdup(cmd); |
| 330 | if (!cmd) |
| 331 | goto oom; |
| 332 | |
| 333 | for (t = f = cmd; *f; f++) { |
| 334 | if (*f == ' ') |
| 335 | continue; |
| 336 | /* Comparison leaves rooms for server_options(). */ |
| 337 | if (argc >= MAX_ARGS - MAX_SERVER_ARGS) { |
| 338 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); |
| 339 | exit_cleanup(RERR_SYNTAX); |
| 340 | } |
| 341 | args[argc++] = t; |
| 342 | while (*f != ' ' || in_quote) { |
| 343 | if (!*f) { |
| 344 | if (in_quote) { |
| 345 | rprintf(FERROR, |
| 346 | "Missing trailing-%c in remote-shell command.\n", |
| 347 | in_quote); |
| 348 | exit_cleanup(RERR_SYNTAX); |
| 349 | } |
| 350 | f--; |
| 351 | break; |
| 352 | } |
| 353 | if (*f == '\'' || *f == '"') { |
| 354 | if (!in_quote) { |
| 355 | in_quote = *f++; |
| 356 | continue; |
| 357 | } |
| 358 | if (*f == in_quote && *++f != in_quote) { |
| 359 | in_quote = '\0'; |
| 360 | continue; |
| 361 | } |
| 362 | } |
| 363 | *t++ = *f++; |
| 364 | } |
| 365 | *t++ = '\0'; |
| 366 | } |
| 367 | |
| 368 | /* check to see if we've already been given '-l user' in |
| 369 | * the remote-shell command */ |
| 370 | for (i = 0; i < argc-1; i++) { |
| 371 | if (!strcmp(args[i], "-l") && args[i+1][0] != '-') |
| 372 | dash_l_set = 1; |
| 373 | } |
| 374 | |
| 375 | #ifdef HAVE_REMSH |
| 376 | /* remsh (on HPUX) takes the arguments the other way around */ |
| 377 | args[argc++] = machine; |
| 378 | if (user && !(daemon_over_rsh && dash_l_set)) { |
| 379 | args[argc++] = "-l"; |
| 380 | args[argc++] = user; |
| 381 | } |
| 382 | #else |
| 383 | if (user && !(daemon_over_rsh && dash_l_set)) { |
| 384 | args[argc++] = "-l"; |
| 385 | args[argc++] = user; |
| 386 | } |
| 387 | args[argc++] = machine; |
| 388 | #endif |
| 389 | |
| 390 | args[argc++] = rsync_path; |
| 391 | |
| 392 | if (blocking_io < 0) { |
| 393 | char *cp; |
| 394 | if ((cp = strrchr(cmd, '/')) != NULL) |
| 395 | cp++; |
| 396 | else |
| 397 | cp = cmd; |
| 398 | if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0) |
| 399 | blocking_io = 1; |
| 400 | } |
| 401 | |
| 402 | server_options(args,&argc); |
| 403 | |
| 404 | if (argc >= MAX_ARGS - 2) { |
| 405 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); |
| 406 | exit_cleanup(RERR_SYNTAX); |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | args[argc++] = "."; |
| 411 | |
| 412 | if (!daemon_over_rsh && path && *path) |
| 413 | args[argc++] = path; |
| 414 | |
| 415 | args[argc] = NULL; |
| 416 | |
| 417 | if (verbose > 3) { |
| 418 | for (i = 0; i < argc; i++) |
| 419 | rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]); |
| 420 | rprintf(FCLIENT, "\n"); |
| 421 | } |
| 422 | |
| 423 | if (read_batch) { |
| 424 | int from_gen_pipe[2]; |
| 425 | if (fd_pair(from_gen_pipe) < 0) { |
| 426 | rsyserr(FERROR, errno, "pipe"); |
| 427 | exit_cleanup(RERR_IPC); |
| 428 | } |
| 429 | batch_gen_fd = from_gen_pipe[0]; |
| 430 | *f_out = from_gen_pipe[1]; |
| 431 | *f_in = batch_fd; |
| 432 | ret = -1; /* no child pid */ |
| 433 | } else if (local_server) { |
| 434 | /* If the user didn't request --[no-]whole-file, force |
| 435 | * it on, but only if we're not batch processing. */ |
| 436 | if (whole_file < 0 && !write_batch) |
| 437 | whole_file = 1; |
| 438 | ret = local_child(argc, args, f_in, f_out, child_main); |
| 439 | } else |
| 440 | ret = piped_child(args,f_in,f_out); |
| 441 | |
| 442 | if (dir) |
| 443 | free(dir); |
| 444 | |
| 445 | return ret; |
| 446 | |
| 447 | oom: |
| 448 | out_of_memory("do_cmd"); |
| 449 | return 0; /* not reached */ |
| 450 | } |
| 451 | |
| 452 | /* The receiving side operates in one of two modes: |
| 453 | * |
| 454 | * 1. it receives any number of files into a destination directory, |
| 455 | * placing them according to their names in the file-list. |
| 456 | * |
| 457 | * 2. it receives a single file and saves it using the name in the |
| 458 | * destination path instead of its file-list name. This requires a |
| 459 | * "local name" for writing out the destination file. |
| 460 | * |
| 461 | * So, our task is to figure out what mode/local-name we need. |
| 462 | * For mode 1, we change into the destination directory and return NULL. |
| 463 | * For mode 2, we change into the directory containing the destination |
| 464 | * file (if we aren't already there) and return the local-name. */ |
| 465 | static char *get_local_name(struct file_list *flist, char *dest_path) |
| 466 | { |
| 467 | STRUCT_STAT st; |
| 468 | int statret; |
| 469 | char *cp; |
| 470 | |
| 471 | if (verbose > 2) { |
| 472 | rprintf(FINFO, "get_local_name count=%d %s\n", |
| 473 | flist->count, NS(dest_path)); |
| 474 | } |
| 475 | |
| 476 | if (!dest_path || list_only) |
| 477 | return NULL; |
| 478 | |
| 479 | /* See what currently exists at the destination. */ |
| 480 | if ((statret = do_stat(dest_path, &st)) == 0) { |
| 481 | /* If the destination is a dir, enter it and use mode 1. */ |
| 482 | if (S_ISDIR(st.st_mode)) { |
| 483 | if (!push_dir(dest_path, 0)) { |
| 484 | rsyserr(FERROR, errno, "push_dir#1 %s failed", |
| 485 | full_fname(dest_path)); |
| 486 | exit_cleanup(RERR_FILESELECT); |
| 487 | } |
| 488 | return NULL; |
| 489 | } |
| 490 | if (flist->count > 1) { |
| 491 | rprintf(FERROR, |
| 492 | "ERROR: destination must be a directory when" |
| 493 | " copying more than 1 file\n"); |
| 494 | exit_cleanup(RERR_FILESELECT); |
| 495 | } |
| 496 | /* Caution: flist->count could be 0! */ |
| 497 | if (flist->count == 1 && S_ISDIR(flist->files[0]->mode)) { |
| 498 | rprintf(FERROR, |
| 499 | "ERROR: cannot overwrite non-directory" |
| 500 | " with a directory\n"); |
| 501 | exit_cleanup(RERR_FILESELECT); |
| 502 | } |
| 503 | } else if (errno != ENOENT) { |
| 504 | /* If we don't know what's at the destination, fail. */ |
| 505 | rsyserr(FERROR, errno, "ERROR: cannot stat destination %s", |
| 506 | full_fname(dest_path)); |
| 507 | exit_cleanup(RERR_FILESELECT); |
| 508 | } |
| 509 | |
| 510 | cp = strrchr(dest_path, '/'); |
| 511 | |
| 512 | /* If we need a destination directory because the transfer is not |
| 513 | * of a single non-directory or the user has requested one via a |
| 514 | * destination path ending in a slash, create one and use mode 1. */ |
| 515 | if (flist->count > 1 || (cp && !cp[1])) { |
| 516 | /* Lop off the final slash (if any). */ |
| 517 | if (cp && !cp[1]) |
| 518 | *cp = '\0'; |
| 519 | |
| 520 | if (statret == 0) { |
| 521 | rprintf(FERROR, |
| 522 | "ERROR: destination path is not a directory\n"); |
| 523 | exit_cleanup(RERR_SYNTAX); |
| 524 | } |
| 525 | |
| 526 | if (mkdir_defmode(dest_path) != 0) { |
| 527 | rsyserr(FERROR, errno, "mkdir %s failed", |
| 528 | full_fname(dest_path)); |
| 529 | exit_cleanup(RERR_FILEIO); |
| 530 | } |
| 531 | |
| 532 | new_root_dir = 1; |
| 533 | |
| 534 | if (verbose) |
| 535 | rprintf(FINFO, "created directory %s\n", dest_path); |
| 536 | |
| 537 | if (dry_run) { |
| 538 | /* Indicate that dest dir doesn't really exist. */ |
| 539 | dry_run++; |
| 540 | } |
| 541 | |
| 542 | if (!push_dir(dest_path, dry_run > 1)) { |
| 543 | rsyserr(FERROR, errno, "push_dir#2 %s failed", |
| 544 | full_fname(dest_path)); |
| 545 | exit_cleanup(RERR_FILESELECT); |
| 546 | } |
| 547 | |
| 548 | return NULL; |
| 549 | } |
| 550 | |
| 551 | /* Otherwise, we are writing a single file, possibly on top of an |
| 552 | * existing non-directory. Change to the item's parent directory |
| 553 | * (if it has a path component), return the basename of the |
| 554 | * destination file as the local name, and use mode 2. */ |
| 555 | if (!cp) |
| 556 | return dest_path; |
| 557 | |
| 558 | if (cp == dest_path) |
| 559 | dest_path = "/"; |
| 560 | |
| 561 | *cp = '\0'; |
| 562 | if (!push_dir(dest_path, 0)) { |
| 563 | rsyserr(FERROR, errno, "push_dir#3 %s failed", |
| 564 | full_fname(dest_path)); |
| 565 | exit_cleanup(RERR_FILESELECT); |
| 566 | } |
| 567 | *cp = '/'; |
| 568 | |
| 569 | return cp + 1; |
| 570 | } |
| 571 | |
| 572 | /* Call this if the destination dir (which is assumed to be in curr_dir) |
| 573 | * does not yet exist and we can't create it due to being in dry-run |
| 574 | * mode. We'll fix dirs that can be relative to the non-existent dir. */ |
| 575 | static void fix_basis_dirs(void) |
| 576 | { |
| 577 | char **dir, *new, *slash; |
| 578 | int len; |
| 579 | |
| 580 | if (dry_run <= 1) |
| 581 | return; |
| 582 | |
| 583 | slash = strrchr(curr_dir, '/'); |
| 584 | |
| 585 | for (dir = basis_dir; *dir; dir++) { |
| 586 | if (**dir == '/') |
| 587 | continue; |
| 588 | len = curr_dir_len + 1 + strlen(*dir) + 1; |
| 589 | if (!(new = new_array(char, len))) |
| 590 | out_of_memory("fix_basis_dirs"); |
| 591 | if (slash && strncmp(*dir, "../", 3) == 0) { |
| 592 | /* We want to remove only one leading "../" prefix for |
| 593 | * the directory we couldn't create in dry-run mode: |
| 594 | * this ensures that any other ".." references get |
| 595 | * evaluated the same as they would for a live copy. */ |
| 596 | *slash = '\0'; |
| 597 | pathjoin(new, len, curr_dir, *dir + 3); |
| 598 | *slash = '/'; |
| 599 | } else |
| 600 | pathjoin(new, len, curr_dir, *dir); |
| 601 | *dir = new; |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | /* This is only called by the sender. */ |
| 606 | static void read_final_goodbye(int f_in, int f_out) |
| 607 | { |
| 608 | int i; |
| 609 | |
| 610 | if (protocol_version < 29) |
| 611 | i = read_int(f_in); |
| 612 | else { |
| 613 | while ((i = read_int(f_in)) == the_file_list->count |
| 614 | && read_shortint(f_in) == ITEM_IS_NEW) { |
| 615 | /* Forward the keep-alive (no-op) to the receiver. */ |
| 616 | write_int(f_out, the_file_list->count); |
| 617 | write_shortint(f_out, ITEM_IS_NEW); |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | if (i != -1) { |
| 622 | rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n", |
| 623 | i, who_am_i()); |
| 624 | exit_cleanup(RERR_PROTOCOL); |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | |
| 629 | static void do_server_sender(int f_in, int f_out, int argc, char *argv[]) |
| 630 | { |
| 631 | struct file_list *flist; |
| 632 | char *dir = argv[0]; |
| 633 | |
| 634 | if (verbose > 2) { |
| 635 | rprintf(FINFO, "server_sender starting pid=%ld\n", |
| 636 | (long)getpid()); |
| 637 | } |
| 638 | |
| 639 | if (am_daemon && lp_write_only(module_id)) { |
| 640 | rprintf(FERROR, "ERROR: module is write only\n"); |
| 641 | exit_cleanup(RERR_SYNTAX); |
| 642 | return; |
| 643 | } |
| 644 | if (am_daemon && lp_read_only(module_id) && remove_source_files) { |
| 645 | rprintf(FERROR, |
| 646 | "ERROR: --remove-%s-files cannot be used with a read-only module\n", |
| 647 | remove_source_files == 1 ? "source" : "sent"); |
| 648 | exit_cleanup(RERR_SYNTAX); |
| 649 | return; |
| 650 | } |
| 651 | |
| 652 | if (!relative_paths) { |
| 653 | if (!push_dir(dir, 0)) { |
| 654 | rsyserr(FERROR, errno, "push_dir#3 %s failed", |
| 655 | full_fname(dir)); |
| 656 | exit_cleanup(RERR_FILESELECT); |
| 657 | } |
| 658 | } |
| 659 | argc--; |
| 660 | argv++; |
| 661 | |
| 662 | if (argc == 0 && (recurse || list_only)) { |
| 663 | argc = 1; |
| 664 | argv--; |
| 665 | argv[0] = "."; |
| 666 | } |
| 667 | |
| 668 | flist = send_file_list(f_out,argc,argv); |
| 669 | if (!flist || flist->count == 0) { |
| 670 | exit_cleanup(0); |
| 671 | } |
| 672 | the_file_list = flist; |
| 673 | |
| 674 | io_start_buffering_in(); |
| 675 | io_start_buffering_out(); |
| 676 | |
| 677 | send_files(flist,f_out,f_in); |
| 678 | io_flush(FULL_FLUSH); |
| 679 | handle_stats(f_out); |
| 680 | if (protocol_version >= 24) |
| 681 | read_final_goodbye(f_in, f_out); |
| 682 | io_flush(FULL_FLUSH); |
| 683 | exit_cleanup(0); |
| 684 | } |
| 685 | |
| 686 | |
| 687 | static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name) |
| 688 | { |
| 689 | int pid; |
| 690 | int exit_code = 0; |
| 691 | int error_pipe[2]; |
| 692 | |
| 693 | /* The receiving side mustn't obey this, or an existing symlink that |
| 694 | * points to an identical file won't be replaced by the referent. */ |
| 695 | copy_links = copy_dirlinks = 0; |
| 696 | |
| 697 | if (preserve_hard_links) |
| 698 | init_hard_links(); |
| 699 | |
| 700 | if (fd_pair(error_pipe) < 0) { |
| 701 | rsyserr(FERROR, errno, "pipe failed in do_recv"); |
| 702 | exit_cleanup(RERR_IPC); |
| 703 | } |
| 704 | |
| 705 | io_flush(NORMAL_FLUSH); |
| 706 | |
| 707 | if ((pid = do_fork()) == -1) { |
| 708 | rsyserr(FERROR, errno, "fork failed in do_recv"); |
| 709 | exit_cleanup(RERR_IPC); |
| 710 | } |
| 711 | |
| 712 | if (pid == 0) { |
| 713 | close(error_pipe[0]); |
| 714 | if (f_in != f_out) |
| 715 | close(f_out); |
| 716 | |
| 717 | /* we can't let two processes write to the socket at one time */ |
| 718 | close_multiplexing_out(); |
| 719 | |
| 720 | /* set place to send errors */ |
| 721 | set_msg_fd_out(error_pipe[1]); |
| 722 | |
| 723 | recv_files(f_in, flist, local_name); |
| 724 | io_flush(FULL_FLUSH); |
| 725 | handle_stats(f_in); |
| 726 | |
| 727 | send_msg(MSG_DONE, "", 0); |
| 728 | io_flush(FULL_FLUSH); |
| 729 | |
| 730 | /* Handle any keep-alive packets from the post-processing work |
| 731 | * that the generator does. */ |
| 732 | if (protocol_version >= 29) { |
| 733 | kluge_around_eof = -1; |
| 734 | |
| 735 | /* This should only get stopped via a USR2 signal. */ |
| 736 | while (read_int(f_in) == flist->count |
| 737 | && read_shortint(f_in) == ITEM_IS_NEW) {} |
| 738 | |
| 739 | rprintf(FERROR, "Invalid packet at end of run [%s]\n", |
| 740 | who_am_i()); |
| 741 | exit_cleanup(RERR_PROTOCOL); |
| 742 | } |
| 743 | |
| 744 | /* Finally, we go to sleep until our parent kills us with a |
| 745 | * USR2 signal. We sleep for a short time, as on some OSes |
| 746 | * a signal won't interrupt a sleep! */ |
| 747 | while (1) |
| 748 | msleep(20); |
| 749 | } |
| 750 | |
| 751 | am_generator = 1; |
| 752 | close_multiplexing_in(); |
| 753 | if (write_batch && !am_server) |
| 754 | stop_write_batch(); |
| 755 | |
| 756 | close(error_pipe[1]); |
| 757 | if (f_in != f_out) |
| 758 | close(f_in); |
| 759 | |
| 760 | io_start_buffering_out(); |
| 761 | |
| 762 | set_msg_fd_in(error_pipe[0]); |
| 763 | |
| 764 | generate_files(f_out, flist, local_name); |
| 765 | |
| 766 | handle_stats(-1); |
| 767 | io_flush(FULL_FLUSH); |
| 768 | if (protocol_version >= 24) { |
| 769 | /* send a final goodbye message */ |
| 770 | write_int(f_out, -1); |
| 771 | } |
| 772 | io_flush(FULL_FLUSH); |
| 773 | |
| 774 | set_msg_fd_in(-1); |
| 775 | kill(pid, SIGUSR2); |
| 776 | wait_process_with_flush(pid, &exit_code); |
| 777 | return exit_code; |
| 778 | } |
| 779 | |
| 780 | |
| 781 | static void do_server_recv(int f_in, int f_out, int argc,char *argv[]) |
| 782 | { |
| 783 | int exit_code; |
| 784 | struct file_list *flist; |
| 785 | char *local_name = NULL; |
| 786 | char *dir = NULL; |
| 787 | int save_verbose = verbose; |
| 788 | |
| 789 | if (filesfrom_fd >= 0) { |
| 790 | /* We can't mix messages with files-from data on the socket, |
| 791 | * so temporarily turn off verbose messages. */ |
| 792 | verbose = 0; |
| 793 | } |
| 794 | |
| 795 | if (verbose > 2) { |
| 796 | rprintf(FINFO, "server_recv(%d) starting pid=%ld\n", |
| 797 | argc, (long)getpid()); |
| 798 | } |
| 799 | |
| 800 | if (am_daemon && lp_read_only(module_id)) { |
| 801 | rprintf(FERROR,"ERROR: module is read only\n"); |
| 802 | exit_cleanup(RERR_SYNTAX); |
| 803 | return; |
| 804 | } |
| 805 | |
| 806 | if (argc > 0) { |
| 807 | dir = argv[0]; |
| 808 | argc--; |
| 809 | argv++; |
| 810 | if (!am_daemon && !push_dir(dir, 0)) { |
| 811 | rsyserr(FERROR, errno, "push_dir#4 %s failed", |
| 812 | full_fname(dir)); |
| 813 | exit_cleanup(RERR_FILESELECT); |
| 814 | } |
| 815 | } |
| 816 | |
| 817 | io_start_buffering_in(); |
| 818 | recv_filter_list(f_in); |
| 819 | |
| 820 | if (filesfrom_fd >= 0) { |
| 821 | /* We need to send the files-from names to the sender at the |
| 822 | * same time that we receive the file-list from them, so we |
| 823 | * need the IO routines to automatically write out the names |
| 824 | * onto our f_out socket as we read the file-list. This |
| 825 | * avoids both deadlock and extra delays/buffers. */ |
| 826 | io_set_filesfrom_fds(filesfrom_fd, f_out); |
| 827 | filesfrom_fd = -1; |
| 828 | } |
| 829 | |
| 830 | flist = recv_file_list(f_in); |
| 831 | verbose = save_verbose; |
| 832 | if (!flist) { |
| 833 | rprintf(FERROR,"server_recv: recv_file_list error\n"); |
| 834 | exit_cleanup(RERR_FILESELECT); |
| 835 | } |
| 836 | the_file_list = flist; |
| 837 | |
| 838 | if (argc > 0) |
| 839 | local_name = get_local_name(flist,argv[0]); |
| 840 | |
| 841 | /* Now that we know what our destination directory turned out to be, |
| 842 | * we can sanitize the --link-/copy-/compare-dest args correctly. */ |
| 843 | if (sanitize_paths) { |
| 844 | char **dir; |
| 845 | for (dir = basis_dir; *dir; dir++) { |
| 846 | *dir = sanitize_path(NULL, *dir, NULL, curr_dir_depth, NULL); |
| 847 | } |
| 848 | if (partial_dir) { |
| 849 | partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, NULL); |
| 850 | } |
| 851 | } |
| 852 | fix_basis_dirs(); |
| 853 | |
| 854 | if (server_filter_list.head) { |
| 855 | char **dir; |
| 856 | struct filter_list_struct *elp = &server_filter_list; |
| 857 | |
| 858 | for (dir = basis_dir; *dir; dir++) { |
| 859 | if (check_filter(elp, *dir, 1) < 0) |
| 860 | goto options_rejected; |
| 861 | } |
| 862 | if (partial_dir && *partial_dir == '/' |
| 863 | && check_filter(elp, partial_dir, 1) < 0) { |
| 864 | options_rejected: |
| 865 | rprintf(FERROR, |
| 866 | "Your options have been rejected by the server.\n"); |
| 867 | exit_cleanup(RERR_SYNTAX); |
| 868 | } |
| 869 | } |
| 870 | |
| 871 | exit_code = do_recv(f_in,f_out,flist,local_name); |
| 872 | exit_cleanup(exit_code); |
| 873 | } |
| 874 | |
| 875 | |
| 876 | int child_main(int argc, char *argv[]) |
| 877 | { |
| 878 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
| 879 | return 0; |
| 880 | } |
| 881 | |
| 882 | |
| 883 | void start_server(int f_in, int f_out, int argc, char *argv[]) |
| 884 | { |
| 885 | set_nonblocking(f_in); |
| 886 | set_nonblocking(f_out); |
| 887 | |
| 888 | io_set_sock_fds(f_in, f_out); |
| 889 | setup_protocol(f_out, f_in); |
| 890 | #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H |
| 891 | setup_iconv(); |
| 892 | #endif |
| 893 | |
| 894 | if (protocol_version >= 23) |
| 895 | io_start_multiplex_out(); |
| 896 | |
| 897 | if (am_sender) { |
| 898 | keep_dirlinks = 0; /* Must be disabled on the sender. */ |
| 899 | if (need_messages_from_generator) |
| 900 | io_start_multiplex_in(); |
| 901 | |
| 902 | recv_filter_list(f_in); |
| 903 | do_server_sender(f_in, f_out, argc, argv); |
| 904 | } else { |
| 905 | do_server_recv(f_in, f_out, argc, argv); |
| 906 | } |
| 907 | exit_cleanup(0); |
| 908 | } |
| 909 | |
| 910 | |
| 911 | /* |
| 912 | * This is called once the connection has been negotiated. It is used |
| 913 | * for rsyncd, remote-shell, and local connections. |
| 914 | */ |
| 915 | int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[]) |
| 916 | { |
| 917 | struct file_list *flist = NULL; |
| 918 | int exit_code = 0, exit_code2 = 0; |
| 919 | char *local_name = NULL; |
| 920 | |
| 921 | cleanup_child_pid = pid; |
| 922 | if (!read_batch) { |
| 923 | set_nonblocking(f_in); |
| 924 | set_nonblocking(f_out); |
| 925 | } |
| 926 | |
| 927 | io_set_sock_fds(f_in, f_out); |
| 928 | setup_protocol(f_out,f_in); |
| 929 | #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H |
| 930 | setup_iconv(); |
| 931 | #endif |
| 932 | |
| 933 | if (protocol_version >= 23 && !read_batch) |
| 934 | io_start_multiplex_in(); |
| 935 | |
| 936 | /* We set our stderr file handle to blocking because ssh might have |
| 937 | * set it to non-blocking. This can be particularly troublesome if |
| 938 | * stderr is a clone of stdout, because ssh would have set our stdout |
| 939 | * to non-blocking at the same time (which can easily cause us to lose |
| 940 | * output from our print statements). This kluge shouldn't cause ssh |
| 941 | * any problems for how we use it. Note also that we delayed setting |
| 942 | * this until after the above protocol setup so that we know for sure |
| 943 | * that ssh is done twiddling its file descriptors. */ |
| 944 | set_blocking(STDERR_FILENO); |
| 945 | |
| 946 | if (am_sender) { |
| 947 | keep_dirlinks = 0; /* Must be disabled on the sender. */ |
| 948 | io_start_buffering_out(); |
| 949 | if (!filesfrom_host) |
| 950 | set_msg_fd_in(f_in); |
| 951 | send_filter_list(f_out); |
| 952 | if (filesfrom_host) |
| 953 | filesfrom_fd = f_in; |
| 954 | |
| 955 | if (write_batch && !am_server) |
| 956 | start_write_batch(f_out); |
| 957 | flist = send_file_list(f_out, argc, argv); |
| 958 | set_msg_fd_in(-1); |
| 959 | if (verbose > 3) |
| 960 | rprintf(FINFO,"file list sent\n"); |
| 961 | the_file_list = flist; |
| 962 | |
| 963 | io_flush(NORMAL_FLUSH); |
| 964 | send_files(flist,f_out,f_in); |
| 965 | io_flush(FULL_FLUSH); |
| 966 | handle_stats(-1); |
| 967 | if (protocol_version >= 24) |
| 968 | read_final_goodbye(f_in, f_out); |
| 969 | if (pid != -1) { |
| 970 | if (verbose > 3) |
| 971 | rprintf(FINFO,"client_run waiting on %d\n", (int) pid); |
| 972 | io_flush(FULL_FLUSH); |
| 973 | wait_process_with_flush(pid, &exit_code); |
| 974 | } |
| 975 | output_summary(); |
| 976 | io_flush(FULL_FLUSH); |
| 977 | exit_cleanup(exit_code); |
| 978 | } |
| 979 | |
| 980 | if (need_messages_from_generator && !read_batch) |
| 981 | io_start_multiplex_out(); |
| 982 | |
| 983 | if (argc == 0) |
| 984 | list_only |= 1; |
| 985 | |
| 986 | send_filter_list(read_batch ? -1 : f_out); |
| 987 | |
| 988 | if (filesfrom_fd >= 0) { |
| 989 | io_set_filesfrom_fds(filesfrom_fd, f_out); |
| 990 | filesfrom_fd = -1; |
| 991 | } |
| 992 | |
| 993 | if (write_batch && !am_server) |
| 994 | start_write_batch(f_in); |
| 995 | flist = recv_file_list(f_in); |
| 996 | the_file_list = flist; |
| 997 | |
| 998 | if (flist && flist->count > 0) { |
| 999 | local_name = get_local_name(flist, argv[0]); |
| 1000 | |
| 1001 | fix_basis_dirs(); |
| 1002 | |
| 1003 | exit_code2 = do_recv(f_in, f_out, flist, local_name); |
| 1004 | } else { |
| 1005 | handle_stats(-1); |
| 1006 | output_summary(); |
| 1007 | } |
| 1008 | |
| 1009 | if (pid != -1) { |
| 1010 | if (verbose > 3) |
| 1011 | rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid); |
| 1012 | io_flush(FULL_FLUSH); |
| 1013 | wait_process_with_flush(pid, &exit_code); |
| 1014 | } |
| 1015 | |
| 1016 | return MAX(exit_code, exit_code2); |
| 1017 | } |
| 1018 | |
| 1019 | static int copy_argv (char *argv[]) |
| 1020 | { |
| 1021 | int i; |
| 1022 | |
| 1023 | for (i = 0; argv[i]; i++) { |
| 1024 | if (!(argv[i] = strdup(argv[i]))) { |
| 1025 | rprintf (FERROR, "out of memory at %s(%d)\n", |
| 1026 | __FILE__, __LINE__); |
| 1027 | return RERR_MALLOC; |
| 1028 | } |
| 1029 | } |
| 1030 | |
| 1031 | return 0; |
| 1032 | } |
| 1033 | |
| 1034 | |
| 1035 | /** |
| 1036 | * Start a client for either type of remote connection. Work out |
| 1037 | * whether the arguments request a remote shell or rsyncd connection, |
| 1038 | * and call the appropriate connection function, then run_client. |
| 1039 | * |
| 1040 | * Calls either start_socket_client (for sockets) or do_cmd and |
| 1041 | * client_run (for ssh). |
| 1042 | **/ |
| 1043 | static int start_client(int argc, char *argv[]) |
| 1044 | { |
| 1045 | char *p; |
| 1046 | char *shell_machine = NULL; |
| 1047 | char *shell_path = NULL; |
| 1048 | char *shell_user = NULL; |
| 1049 | int ret; |
| 1050 | pid_t pid; |
| 1051 | int f_in,f_out; |
| 1052 | int rc; |
| 1053 | |
| 1054 | /* Don't clobber argv[] so that ps(1) can still show the right |
| 1055 | * command line. */ |
| 1056 | if ((rc = copy_argv(argv))) |
| 1057 | return rc; |
| 1058 | |
| 1059 | if (!read_batch) { /* for read_batch, NO source is specified */ |
| 1060 | shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port); |
| 1061 | if (shell_path) { /* source is remote */ |
| 1062 | char *dummy1; |
| 1063 | int dummy2; |
| 1064 | if (--argc |
| 1065 | && check_for_hostspec(argv[argc], &dummy1, &dummy2)) { |
| 1066 | rprintf(FERROR, |
| 1067 | "The source and destination cannot both be remote.\n"); |
| 1068 | exit_cleanup(RERR_SYNTAX); |
| 1069 | } |
| 1070 | argv++; |
| 1071 | if (filesfrom_host && *filesfrom_host |
| 1072 | && strcmp(filesfrom_host, shell_machine) != 0) { |
| 1073 | rprintf(FERROR, |
| 1074 | "--files-from hostname is not the same as the transfer hostname\n"); |
| 1075 | exit_cleanup(RERR_SYNTAX); |
| 1076 | } |
| 1077 | if (rsync_port) { |
| 1078 | if (!shell_cmd) { |
| 1079 | return start_socket_client(shell_machine, |
| 1080 | shell_path, |
| 1081 | argc, argv); |
| 1082 | } |
| 1083 | daemon_over_rsh = 1; |
| 1084 | } |
| 1085 | |
| 1086 | am_sender = 0; |
| 1087 | } else { /* source is local, check dest arg */ |
| 1088 | am_sender = 1; |
| 1089 | |
| 1090 | if (argc > 1) |
| 1091 | p = argv[--argc]; |
| 1092 | else { |
| 1093 | p = "."; |
| 1094 | list_only = 1; |
| 1095 | } |
| 1096 | |
| 1097 | shell_path = check_for_hostspec(p, &shell_machine, &rsync_port); |
| 1098 | if (shell_path && filesfrom_host && *filesfrom_host |
| 1099 | && strcmp(filesfrom_host, shell_machine) != 0) { |
| 1100 | rprintf(FERROR, |
| 1101 | "--files-from hostname is not the same as the transfer hostname\n"); |
| 1102 | exit_cleanup(RERR_SYNTAX); |
| 1103 | } |
| 1104 | if (!shell_path) { /* no hostspec found, so src & dest are local */ |
| 1105 | local_server = 1; |
| 1106 | if (filesfrom_host) { |
| 1107 | rprintf(FERROR, |
| 1108 | "--files-from cannot be remote when the transfer is local\n"); |
| 1109 | exit_cleanup(RERR_SYNTAX); |
| 1110 | } |
| 1111 | shell_machine = NULL; |
| 1112 | shell_path = p; |
| 1113 | } else if (rsync_port) { |
| 1114 | if (!shell_cmd) { |
| 1115 | return start_socket_client(shell_machine, |
| 1116 | shell_path, |
| 1117 | argc, argv); |
| 1118 | } |
| 1119 | daemon_over_rsh = 1; |
| 1120 | } |
| 1121 | } |
| 1122 | } else { /* read_batch */ |
| 1123 | local_server = 1; |
| 1124 | shell_path = argv[argc-1]; |
| 1125 | if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) { |
| 1126 | rprintf(FERROR, "remote destination is not allowed with --read-batch\n"); |
| 1127 | exit_cleanup(RERR_SYNTAX); |
| 1128 | } |
| 1129 | } |
| 1130 | |
| 1131 | if (shell_machine) { |
| 1132 | p = strrchr(shell_machine,'@'); |
| 1133 | if (p) { |
| 1134 | *p = 0; |
| 1135 | shell_user = shell_machine; |
| 1136 | shell_machine = p+1; |
| 1137 | } |
| 1138 | } |
| 1139 | |
| 1140 | if (verbose > 3) { |
| 1141 | rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n", |
| 1142 | shell_cmd ? shell_cmd : "", |
| 1143 | shell_machine ? shell_machine : "", |
| 1144 | shell_user ? shell_user : "", |
| 1145 | shell_path ? shell_path : ""); |
| 1146 | } |
| 1147 | |
| 1148 | /* for remote source, only single dest arg can remain ... */ |
| 1149 | if (!am_sender && argc > 1) { |
| 1150 | usage(FERROR); |
| 1151 | exit_cleanup(RERR_SYNTAX); |
| 1152 | } |
| 1153 | |
| 1154 | /* ... or no dest at all */ |
| 1155 | if (!am_sender && argc == 0) |
| 1156 | list_only |= 1; |
| 1157 | |
| 1158 | pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path, |
| 1159 | &f_in,&f_out); |
| 1160 | |
| 1161 | /* if we're running an rsync server on the remote host over a |
| 1162 | * remote shell command, we need to do the RSYNCD protocol first */ |
| 1163 | if (daemon_over_rsh) { |
| 1164 | int tmpret; |
| 1165 | tmpret = start_inband_exchange(shell_user, shell_path, |
| 1166 | f_in, f_out, argc); |
| 1167 | if (tmpret < 0) |
| 1168 | return tmpret; |
| 1169 | } |
| 1170 | |
| 1171 | ret = client_run(f_in, f_out, pid, argc, argv); |
| 1172 | |
| 1173 | fflush(stdout); |
| 1174 | fflush(stderr); |
| 1175 | |
| 1176 | return ret; |
| 1177 | } |
| 1178 | |
| 1179 | |
| 1180 | static RETSIGTYPE sigusr1_handler(UNUSED(int val)) |
| 1181 | { |
| 1182 | exit_cleanup(RERR_SIGNAL1); |
| 1183 | } |
| 1184 | |
| 1185 | static RETSIGTYPE sigusr2_handler(UNUSED(int val)) |
| 1186 | { |
| 1187 | if (!am_server) |
| 1188 | output_summary(); |
| 1189 | close_all(); |
| 1190 | if (log_got_error) |
| 1191 | _exit(RERR_PARTIAL); |
| 1192 | _exit(0); |
| 1193 | } |
| 1194 | |
| 1195 | RETSIGTYPE remember_children(UNUSED(int val)) |
| 1196 | { |
| 1197 | #ifdef WNOHANG |
| 1198 | int cnt, status; |
| 1199 | pid_t pid; |
| 1200 | /* An empty waitpid() loop was put here by Tridge and we could never |
| 1201 | * get him to explain why he put it in, so rather than taking it |
| 1202 | * out we're instead saving the child exit statuses for later use. |
| 1203 | * The waitpid() loop presumably eliminates all possibility of leaving |
| 1204 | * zombie children, maybe that's why he did it. */ |
| 1205 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) { |
| 1206 | /* save the child's exit status */ |
| 1207 | for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { |
| 1208 | if (pid_stat_table[cnt].pid == 0) { |
| 1209 | pid_stat_table[cnt].pid = pid; |
| 1210 | pid_stat_table[cnt].status = status; |
| 1211 | break; |
| 1212 | } |
| 1213 | } |
| 1214 | } |
| 1215 | #endif |
| 1216 | #ifndef HAVE_SIGACTION |
| 1217 | signal(SIGCHLD, remember_children); |
| 1218 | #endif |
| 1219 | } |
| 1220 | |
| 1221 | |
| 1222 | /** |
| 1223 | * This routine catches signals and tries to send them to gdb. |
| 1224 | * |
| 1225 | * Because it's called from inside a signal handler it ought not to |
| 1226 | * use too many library routines. |
| 1227 | * |
| 1228 | * @todo Perhaps use "screen -X" instead/as well, to help people |
| 1229 | * debugging without easy access to X. Perhaps use an environment |
| 1230 | * variable, or just call a script? |
| 1231 | * |
| 1232 | * @todo The /proc/ magic probably only works on Linux (and |
| 1233 | * Solaris?) Can we be more portable? |
| 1234 | **/ |
| 1235 | #ifdef MAINTAINER_MODE |
| 1236 | const char *get_panic_action(void) |
| 1237 | { |
| 1238 | const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION"); |
| 1239 | |
| 1240 | if (cmd_fmt) |
| 1241 | return cmd_fmt; |
| 1242 | else |
| 1243 | return "xterm -display :0 -T Panic -n Panic " |
| 1244 | "-e gdb /proc/%d/exe %d"; |
| 1245 | } |
| 1246 | |
| 1247 | |
| 1248 | /** |
| 1249 | * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION. |
| 1250 | * |
| 1251 | * This signal handler is only installed if we were configured with |
| 1252 | * --enable-maintainer-mode. Perhaps it should always be on and we |
| 1253 | * should just look at the environment variable, but I'm a bit leery |
| 1254 | * of a signal sending us into a busy loop. |
| 1255 | **/ |
| 1256 | static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig)) |
| 1257 | { |
| 1258 | char cmd_buf[300]; |
| 1259 | int ret; |
| 1260 | |
| 1261 | snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(), |
| 1262 | getpid(), getpid()); |
| 1263 | |
| 1264 | /* Unless we failed to execute gdb, we allow the process to |
| 1265 | * continue. I'm not sure if that's right. */ |
| 1266 | ret = system(cmd_buf); |
| 1267 | if (ret) |
| 1268 | _exit(ret); |
| 1269 | } |
| 1270 | #endif |
| 1271 | |
| 1272 | |
| 1273 | int main(int argc,char *argv[]) |
| 1274 | { |
| 1275 | int ret; |
| 1276 | int orig_argc = argc; |
| 1277 | char **orig_argv = argv; |
| 1278 | #ifdef HAVE_SIGACTION |
| 1279 | # ifdef HAVE_SIGPROCMASK |
| 1280 | sigset_t sigmask; |
| 1281 | |
| 1282 | sigemptyset(&sigmask); |
| 1283 | # endif |
| 1284 | sigact.sa_flags = SA_NOCLDSTOP; |
| 1285 | #endif |
| 1286 | SIGACTMASK(SIGUSR1, sigusr1_handler); |
| 1287 | SIGACTMASK(SIGUSR2, sigusr2_handler); |
| 1288 | SIGACTMASK(SIGCHLD, remember_children); |
| 1289 | #ifdef MAINTAINER_MODE |
| 1290 | SIGACTMASK(SIGSEGV, rsync_panic_handler); |
| 1291 | SIGACTMASK(SIGFPE, rsync_panic_handler); |
| 1292 | SIGACTMASK(SIGABRT, rsync_panic_handler); |
| 1293 | SIGACTMASK(SIGBUS, rsync_panic_handler); |
| 1294 | #endif |
| 1295 | |
| 1296 | starttime = time(NULL); |
| 1297 | am_root = (MY_UID() == 0); |
| 1298 | |
| 1299 | memset(&stats, 0, sizeof(stats)); |
| 1300 | |
| 1301 | if (argc < 2) { |
| 1302 | usage(FERROR); |
| 1303 | exit_cleanup(RERR_SYNTAX); |
| 1304 | } |
| 1305 | |
| 1306 | /* we set a 0 umask so that correct file permissions can be |
| 1307 | * carried across */ |
| 1308 | orig_umask = umask(0); |
| 1309 | |
| 1310 | #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE |
| 1311 | setlocale(LC_CTYPE, ""); |
| 1312 | #endif |
| 1313 | |
| 1314 | if (!parse_arguments(&argc, (const char ***) &argv, 1)) { |
| 1315 | /* FIXME: We ought to call the same error-handling |
| 1316 | * code here, rather than relying on getopt. */ |
| 1317 | option_error(); |
| 1318 | exit_cleanup(RERR_SYNTAX); |
| 1319 | } |
| 1320 | |
| 1321 | SIGACTMASK(SIGINT, sig_int); |
| 1322 | SIGACTMASK(SIGHUP, sig_int); |
| 1323 | SIGACTMASK(SIGTERM, sig_int); |
| 1324 | #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK |
| 1325 | sigprocmask(SIG_UNBLOCK, &sigmask, NULL); |
| 1326 | #endif |
| 1327 | |
| 1328 | /* Ignore SIGPIPE; we consistently check error codes and will |
| 1329 | * see the EPIPE. */ |
| 1330 | SIGACTION(SIGPIPE, SIG_IGN); |
| 1331 | #ifdef SIGXFSZ |
| 1332 | SIGACTION(SIGXFSZ, SIG_IGN); |
| 1333 | #endif |
| 1334 | |
| 1335 | /* Initialize push_dir here because on some old systems getcwd |
| 1336 | * (implemented by forking "pwd" and reading its output) doesn't |
| 1337 | * work when there are other child processes. Also, on all systems |
| 1338 | * that implement getcwd that way "pwd" can't be found after chroot. */ |
| 1339 | push_dir(NULL, 0); |
| 1340 | |
| 1341 | init_flist(); |
| 1342 | |
| 1343 | if ((write_batch || read_batch) && !am_server) { |
| 1344 | if (write_batch) |
| 1345 | write_batch_shell_file(orig_argc, orig_argv, argc); |
| 1346 | |
| 1347 | if (read_batch && strcmp(batch_name, "-") == 0) |
| 1348 | batch_fd = STDIN_FILENO; |
| 1349 | else { |
| 1350 | batch_fd = do_open(batch_name, |
| 1351 | write_batch ? O_WRONLY | O_CREAT | O_TRUNC |
| 1352 | : O_RDONLY, S_IRUSR | S_IWUSR); |
| 1353 | } |
| 1354 | if (batch_fd < 0) { |
| 1355 | rsyserr(FERROR, errno, "Batch file %s open error", |
| 1356 | full_fname(batch_name)); |
| 1357 | exit_cleanup(RERR_FILEIO); |
| 1358 | } |
| 1359 | if (read_batch) |
| 1360 | read_stream_flags(batch_fd); |
| 1361 | } |
| 1362 | if (write_batch < 0) |
| 1363 | dry_run = 1; |
| 1364 | |
| 1365 | if (am_daemon && !am_server) |
| 1366 | return daemon_main(); |
| 1367 | |
| 1368 | if (argc < 1) { |
| 1369 | usage(FERROR); |
| 1370 | exit_cleanup(RERR_SYNTAX); |
| 1371 | } |
| 1372 | |
| 1373 | if (am_server) { |
| 1374 | set_nonblocking(STDIN_FILENO); |
| 1375 | set_nonblocking(STDOUT_FILENO); |
| 1376 | if (am_daemon) |
| 1377 | return start_daemon(STDIN_FILENO, STDOUT_FILENO); |
| 1378 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
| 1379 | } |
| 1380 | |
| 1381 | ret = start_client(argc, argv); |
| 1382 | if (ret == -1) |
| 1383 | exit_cleanup(RERR_STARTCLIENT); |
| 1384 | else |
| 1385 | exit_cleanup(ret); |
| 1386 | |
| 1387 | return ret; |
| 1388 | } |