| 1 | /* -*- c-file-style: "linux" -*- |
| 2 | |
| 3 | Copyright (C) 1996-2001 by Andrew Tridgell <tridge@samba.org> |
| 4 | Copyright (C) Paul Mackerras 1996 |
| 5 | Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org> |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | #include "rsync.h" |
| 23 | #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H |
| 24 | #include <locale.h> |
| 25 | #endif |
| 26 | |
| 27 | extern int verbose; |
| 28 | extern int dry_run; |
| 29 | extern int list_only; |
| 30 | extern int am_root; |
| 31 | extern int am_server; |
| 32 | extern int am_sender; |
| 33 | extern int am_generator; |
| 34 | extern int am_daemon; |
| 35 | extern int blocking_io; |
| 36 | extern int remove_sent_files; |
| 37 | extern int daemon_over_rsh; |
| 38 | extern int need_messages_from_generator; |
| 39 | extern int kluge_around_eof; |
| 40 | extern int do_stats; |
| 41 | extern int log_got_error; |
| 42 | extern int module_id; |
| 43 | extern int orig_umask; |
| 44 | extern int copy_links; |
| 45 | extern int keep_dirlinks; |
| 46 | extern int preserve_hard_links; |
| 47 | extern int protocol_version; |
| 48 | extern int recurse; |
| 49 | extern int relative_paths; |
| 50 | extern int rsync_port; |
| 51 | extern int whole_file; |
| 52 | extern int read_batch; |
| 53 | extern int write_batch; |
| 54 | extern int batch_fd; |
| 55 | extern int batch_gen_fd; |
| 56 | extern int filesfrom_fd; |
| 57 | extern pid_t cleanup_child_pid; |
| 58 | extern struct stats stats; |
| 59 | extern char *filesfrom_host; |
| 60 | extern char *rsync_path; |
| 61 | extern char *shell_cmd; |
| 62 | extern char *batch_name; |
| 63 | |
| 64 | int local_server = 0; |
| 65 | struct file_list *the_file_list; |
| 66 | |
| 67 | /* There's probably never more than at most 2 outstanding child processes, |
| 68 | * but set it higher, just in case. */ |
| 69 | #define MAXCHILDPROCS 7 |
| 70 | |
| 71 | #if defined HAVE_SIGACTION && defined HAVE_SIGPROCMASK |
| 72 | #define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n)) |
| 73 | static struct sigaction sigact; |
| 74 | #endif |
| 75 | |
| 76 | struct pid_status { |
| 77 | pid_t pid; |
| 78 | int status; |
| 79 | } pid_stat_table[MAXCHILDPROCS]; |
| 80 | |
| 81 | static time_t starttime, endtime; |
| 82 | static int64 total_read, total_written; |
| 83 | |
| 84 | static void show_malloc_stats(void); |
| 85 | |
| 86 | /* Works like waitpid(), but if we already harvested the child pid in our |
| 87 | * sigchld_handler(), we succeed instead of returning an error. */ |
| 88 | pid_t wait_process(pid_t pid, int *status_ptr, int flags) |
| 89 | { |
| 90 | pid_t waited_pid = waitpid(pid, status_ptr, flags); |
| 91 | |
| 92 | if (waited_pid == -1 && errno == ECHILD) { |
| 93 | /* Status of requested child no longer available: check to |
| 94 | * see if it was processed by sigchld_handler(). */ |
| 95 | int cnt; |
| 96 | for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { |
| 97 | if (pid == pid_stat_table[cnt].pid) { |
| 98 | *status_ptr = pid_stat_table[cnt].status; |
| 99 | pid_stat_table[cnt].pid = 0; |
| 100 | return pid; |
| 101 | } |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | return waited_pid; |
| 106 | } |
| 107 | |
| 108 | /* Wait for a process to exit, calling io_flush while waiting. */ |
| 109 | static void wait_process_with_flush(pid_t pid, int *exit_code_ptr) |
| 110 | { |
| 111 | pid_t waited_pid; |
| 112 | int status; |
| 113 | |
| 114 | while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) { |
| 115 | msleep(20); |
| 116 | io_flush(FULL_FLUSH); |
| 117 | } |
| 118 | |
| 119 | /* TODO: If the child exited on a signal, then log an |
| 120 | * appropriate error message. Perhaps we should also accept a |
| 121 | * message describing the purpose of the child. Also indicate |
| 122 | * this to the caller so that they know something went wrong. */ |
| 123 | if (waited_pid < 0) { |
| 124 | rsyserr(FERROR, errno, "waitpid"); |
| 125 | *exit_code_ptr = RERR_WAITCHILD; |
| 126 | } else if (!WIFEXITED(status)) { |
| 127 | #ifdef WCOREDUMP |
| 128 | if (WCOREDUMP(status)) |
| 129 | *exit_code_ptr = RERR_CRASHED; |
| 130 | else |
| 131 | #endif |
| 132 | if (WIFSIGNALED(status)) |
| 133 | *exit_code_ptr = RERR_TERMINATED; |
| 134 | else |
| 135 | *exit_code_ptr = RERR_WAITCHILD; |
| 136 | } else |
| 137 | *exit_code_ptr = WEXITSTATUS(status); |
| 138 | } |
| 139 | |
| 140 | /* This function gets called from all 3 processes. We want the client side |
| 141 | * to actually output the text, but the sender is the only process that has |
| 142 | * all the stats we need. So, if we're a client sender, we do the report. |
| 143 | * If we're a server sender, we write the stats on the supplied fd. If |
| 144 | * we're the client receiver we read the stats from the supplied fd and do |
| 145 | * the report. All processes might also generate a set of debug stats, if |
| 146 | * the verbose level is high enough (this is the only thing that the |
| 147 | * generator process and the server receiver ever do here). */ |
| 148 | static void handle_stats(int f) |
| 149 | { |
| 150 | endtime = time(NULL); |
| 151 | |
| 152 | /* Cache two stats because the read/write code can change it. */ |
| 153 | total_read = stats.total_read; |
| 154 | total_written = stats.total_written; |
| 155 | |
| 156 | if (do_stats && verbose > 1) { |
| 157 | /* These come out from every process */ |
| 158 | show_malloc_stats(); |
| 159 | show_flist_stats(); |
| 160 | } |
| 161 | |
| 162 | if (am_generator) |
| 163 | return; |
| 164 | |
| 165 | if (am_daemon) { |
| 166 | log_exit(0, __FILE__, __LINE__); |
| 167 | if (f == -1 || !am_sender) |
| 168 | return; |
| 169 | } |
| 170 | |
| 171 | if (am_server) { |
| 172 | if (am_sender) { |
| 173 | write_longint(f, total_read); |
| 174 | write_longint(f, total_written); |
| 175 | write_longint(f, stats.total_size); |
| 176 | if (protocol_version >= 29) { |
| 177 | write_longint(f, stats.flist_buildtime); |
| 178 | write_longint(f, stats.flist_xfertime); |
| 179 | } |
| 180 | } |
| 181 | return; |
| 182 | } |
| 183 | |
| 184 | /* this is the client */ |
| 185 | |
| 186 | if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */ |
| 187 | ; |
| 188 | else if (!am_sender) { |
| 189 | /* Read the first two in opposite order because the meaning of |
| 190 | * read/write swaps when switching from sender to receiver. */ |
| 191 | total_written = read_longint(f); |
| 192 | total_read = read_longint(f); |
| 193 | stats.total_size = read_longint(f); |
| 194 | if (protocol_version >= 29) { |
| 195 | stats.flist_buildtime = read_longint(f); |
| 196 | stats.flist_xfertime = read_longint(f); |
| 197 | } |
| 198 | } else if (write_batch) { |
| 199 | /* The --read-batch process is going to be a client |
| 200 | * receiver, so we need to give it the stats. */ |
| 201 | write_longint(batch_fd, total_read); |
| 202 | write_longint(batch_fd, total_written); |
| 203 | write_longint(batch_fd, stats.total_size); |
| 204 | if (protocol_version >= 29) { |
| 205 | write_longint(batch_fd, stats.flist_buildtime); |
| 206 | write_longint(batch_fd, stats.flist_xfertime); |
| 207 | } |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | static void output_summary(void) |
| 212 | { |
| 213 | if (do_stats) { |
| 214 | rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files); |
| 215 | rprintf(FINFO,"Number of files transferred: %d\n", |
| 216 | stats.num_transferred_files); |
| 217 | rprintf(FINFO,"Total file size: %s bytes\n", |
| 218 | human_num(stats.total_size)); |
| 219 | rprintf(FINFO,"Total transferred file size: %s bytes\n", |
| 220 | human_num(stats.total_transferred_size)); |
| 221 | rprintf(FINFO,"Literal data: %s bytes\n", |
| 222 | human_num(stats.literal_data)); |
| 223 | rprintf(FINFO,"Matched data: %s bytes\n", |
| 224 | human_num(stats.matched_data)); |
| 225 | rprintf(FINFO,"File list size: %d\n", stats.flist_size); |
| 226 | if (stats.flist_buildtime) { |
| 227 | rprintf(FINFO, |
| 228 | "File list generation time: %.3f seconds\n", |
| 229 | (double)stats.flist_buildtime / 1000); |
| 230 | rprintf(FINFO, |
| 231 | "File list transfer time: %.3f seconds\n", |
| 232 | (double)stats.flist_xfertime / 1000); |
| 233 | } |
| 234 | rprintf(FINFO,"Total bytes sent: %s\n", |
| 235 | human_num(total_written)); |
| 236 | rprintf(FINFO,"Total bytes received: %s\n", |
| 237 | human_num(total_read)); |
| 238 | } |
| 239 | |
| 240 | if (verbose || do_stats) { |
| 241 | rprintf(FINFO, |
| 242 | "\nsent %s bytes received %s bytes %s bytes/sec\n", |
| 243 | human_num(total_written), human_num(total_read), |
| 244 | human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2)); |
| 245 | rprintf(FINFO, "total size is %s speedup is %.2f\n", |
| 246 | human_num(stats.total_size), |
| 247 | (double)stats.total_size / (total_written+total_read)); |
| 248 | } |
| 249 | |
| 250 | fflush(stdout); |
| 251 | fflush(stderr); |
| 252 | } |
| 253 | |
| 254 | |
| 255 | /** |
| 256 | * If our C library can get malloc statistics, then show them to FINFO |
| 257 | **/ |
| 258 | static void show_malloc_stats(void) |
| 259 | { |
| 260 | #ifdef HAVE_MALLINFO |
| 261 | struct mallinfo mi; |
| 262 | |
| 263 | mi = mallinfo(); |
| 264 | |
| 265 | rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n", |
| 266 | getpid(), am_server ? "server " : "", |
| 267 | am_daemon ? "daemon " : "", who_am_i()); |
| 268 | rprintf(FINFO, " arena: %10ld (bytes from sbrk)\n", |
| 269 | (long)mi.arena); |
| 270 | rprintf(FINFO, " ordblks: %10ld (chunks not in use)\n", |
| 271 | (long)mi.ordblks); |
| 272 | rprintf(FINFO, " smblks: %10ld\n", |
| 273 | (long)mi.smblks); |
| 274 | rprintf(FINFO, " hblks: %10ld (chunks from mmap)\n", |
| 275 | (long)mi.hblks); |
| 276 | rprintf(FINFO, " hblkhd: %10ld (bytes from mmap)\n", |
| 277 | (long)mi.hblkhd); |
| 278 | rprintf(FINFO, " allmem: %10ld (bytes from sbrk + mmap)\n", |
| 279 | (long)mi.arena + mi.hblkhd); |
| 280 | rprintf(FINFO, " usmblks: %10ld\n", |
| 281 | (long)mi.usmblks); |
| 282 | rprintf(FINFO, " fsmblks: %10ld\n", |
| 283 | (long)mi.fsmblks); |
| 284 | rprintf(FINFO, " uordblks: %10ld (bytes used)\n", |
| 285 | (long)mi.uordblks); |
| 286 | rprintf(FINFO, " fordblks: %10ld (bytes free)\n", |
| 287 | (long)mi.fordblks); |
| 288 | rprintf(FINFO, " keepcost: %10ld (bytes in releasable chunk)\n", |
| 289 | (long)mi.keepcost); |
| 290 | #endif /* HAVE_MALLINFO */ |
| 291 | } |
| 292 | |
| 293 | |
| 294 | /* Start the remote shell. cmd may be NULL to use the default. */ |
| 295 | static pid_t do_cmd(char *cmd, char *machine, char *user, char *path, |
| 296 | int *f_in, int *f_out) |
| 297 | { |
| 298 | int i, argc = 0; |
| 299 | char *args[MAX_ARGS]; |
| 300 | pid_t ret; |
| 301 | char *dir = NULL; |
| 302 | int dash_l_set = 0; |
| 303 | |
| 304 | if (!read_batch && !local_server) { |
| 305 | char *t, *f, in_quote = '\0'; |
| 306 | char *rsh_env = getenv(RSYNC_RSH_ENV); |
| 307 | if (!cmd) |
| 308 | cmd = rsh_env; |
| 309 | if (!cmd) |
| 310 | cmd = RSYNC_RSH; |
| 311 | cmd = strdup(cmd); |
| 312 | if (!cmd) |
| 313 | goto oom; |
| 314 | |
| 315 | for (t = f = cmd; *f; f++) { |
| 316 | if (*f == ' ') |
| 317 | continue; |
| 318 | /* Comparison leaves rooms for server_options(). */ |
| 319 | if (argc >= MAX_ARGS - MAX_SERVER_ARGS) { |
| 320 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); |
| 321 | exit_cleanup(RERR_SYNTAX); |
| 322 | } |
| 323 | args[argc++] = t; |
| 324 | while (*f != ' ' || in_quote) { |
| 325 | if (!*f) { |
| 326 | if (in_quote) { |
| 327 | rprintf(FERROR, |
| 328 | "Missing trailing-%c in remote-shell command.\n", |
| 329 | in_quote); |
| 330 | exit_cleanup(RERR_SYNTAX); |
| 331 | } |
| 332 | f--; |
| 333 | break; |
| 334 | } |
| 335 | if (*f == '\'' || *f == '"') { |
| 336 | if (!in_quote) { |
| 337 | in_quote = *f++; |
| 338 | continue; |
| 339 | } |
| 340 | if (*f == in_quote && *++f != in_quote) { |
| 341 | in_quote = '\0'; |
| 342 | continue; |
| 343 | } |
| 344 | } |
| 345 | *t++ = *f++; |
| 346 | } |
| 347 | *t++ = '\0'; |
| 348 | } |
| 349 | |
| 350 | /* check to see if we've already been given '-l user' in |
| 351 | * the remote-shell command */ |
| 352 | for (i = 0; i < argc-1; i++) { |
| 353 | if (!strcmp(args[i], "-l") && args[i+1][0] != '-') |
| 354 | dash_l_set = 1; |
| 355 | } |
| 356 | |
| 357 | #ifdef HAVE_REMSH |
| 358 | /* remsh (on HPUX) takes the arguments the other way around */ |
| 359 | args[argc++] = machine; |
| 360 | if (user && !(daemon_over_rsh && dash_l_set)) { |
| 361 | args[argc++] = "-l"; |
| 362 | args[argc++] = user; |
| 363 | } |
| 364 | #else |
| 365 | if (user && !(daemon_over_rsh && dash_l_set)) { |
| 366 | args[argc++] = "-l"; |
| 367 | args[argc++] = user; |
| 368 | } |
| 369 | args[argc++] = machine; |
| 370 | #endif |
| 371 | |
| 372 | args[argc++] = rsync_path; |
| 373 | |
| 374 | if (blocking_io < 0) { |
| 375 | char *cp; |
| 376 | if ((cp = strrchr(cmd, '/')) != NULL) |
| 377 | cp++; |
| 378 | else |
| 379 | cp = cmd; |
| 380 | if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0) |
| 381 | blocking_io = 1; |
| 382 | } |
| 383 | |
| 384 | server_options(args,&argc); |
| 385 | |
| 386 | if (argc >= MAX_ARGS - 2) { |
| 387 | rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n"); |
| 388 | exit_cleanup(RERR_SYNTAX); |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | args[argc++] = "."; |
| 393 | |
| 394 | if (!daemon_over_rsh && path && *path) |
| 395 | args[argc++] = path; |
| 396 | |
| 397 | args[argc] = NULL; |
| 398 | |
| 399 | if (verbose > 3) { |
| 400 | for (i = 0; i < argc; i++) |
| 401 | rprintf(FINFO, "cmd[%d]=%s ", i, args[i]); |
| 402 | rprintf(FINFO, "\n"); |
| 403 | } |
| 404 | |
| 405 | if (read_batch) { |
| 406 | int from_gen_pipe[2]; |
| 407 | if (fd_pair(from_gen_pipe) < 0) { |
| 408 | rsyserr(FERROR, errno, "pipe"); |
| 409 | exit_cleanup(RERR_IPC); |
| 410 | } |
| 411 | batch_gen_fd = from_gen_pipe[0]; |
| 412 | *f_out = from_gen_pipe[1]; |
| 413 | *f_in = batch_fd; |
| 414 | ret = -1; /* no child pid */ |
| 415 | } else if (local_server) { |
| 416 | /* If the user didn't request --[no-]whole-file, force |
| 417 | * it on, but only if we're not batch processing. */ |
| 418 | if (whole_file < 0 && !write_batch) |
| 419 | whole_file = 1; |
| 420 | ret = local_child(argc, args, f_in, f_out, child_main); |
| 421 | } else |
| 422 | ret = piped_child(args,f_in,f_out); |
| 423 | |
| 424 | if (dir) |
| 425 | free(dir); |
| 426 | |
| 427 | return ret; |
| 428 | |
| 429 | oom: |
| 430 | out_of_memory("do_cmd"); |
| 431 | return 0; /* not reached */ |
| 432 | } |
| 433 | |
| 434 | /* The receiving side operates in one of two modes: |
| 435 | * |
| 436 | * 1. it enters a directory and receives one or more files, placing them |
| 437 | * according to their names in the file-list. |
| 438 | * |
| 439 | * 2. it receives a single file and saves it using the name in the |
| 440 | * destination path instead of its file-list name. This requires a |
| 441 | * "local name" for writing out the destination file. |
| 442 | * |
| 443 | * So, our task is to figure out what mode/local-name we need and return |
| 444 | * either a NULL for mode 1, or the local-name for mode 2. We also |
| 445 | * change directory if there are any path components in dest_path. */ |
| 446 | static char *get_local_name(struct file_list *flist, char *dest_path) |
| 447 | { |
| 448 | STRUCT_STAT st; |
| 449 | char *cp; |
| 450 | |
| 451 | if (verbose > 2) { |
| 452 | rprintf(FINFO, "get_local_name count=%d %s\n", |
| 453 | flist->count, NS(dest_path)); |
| 454 | } |
| 455 | |
| 456 | if (!dest_path) |
| 457 | return NULL; |
| 458 | |
| 459 | /* If the destination path refers to an existing directory, enter |
| 460 | * it and use mode 1. If there is something other than a directory |
| 461 | * at the destination path, we must be transferring one file |
| 462 | * (anything at the destination will be overwritten). */ |
| 463 | if (do_stat(dest_path, &st) == 0) { |
| 464 | if (S_ISDIR(st.st_mode)) { |
| 465 | if (!push_dir(dest_path)) { |
| 466 | rsyserr(FERROR, errno, "push_dir#1 %s failed", |
| 467 | full_fname(dest_path)); |
| 468 | exit_cleanup(RERR_FILESELECT); |
| 469 | } |
| 470 | return NULL; |
| 471 | } |
| 472 | if (flist->count > 1) { |
| 473 | rprintf(FERROR, |
| 474 | "ERROR: destination must be a directory when" |
| 475 | " copying more than 1 file\n"); |
| 476 | exit_cleanup(RERR_FILESELECT); |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | cp = strrchr(dest_path, '/'); |
| 481 | |
| 482 | /* If the destination path ends in a slash or we are transferring |
| 483 | * multiple files, create a directory at the destination path, |
| 484 | * enter the new directory, and use mode 1. */ |
| 485 | if (flist->count > 1 || (cp && !cp[1])) { |
| 486 | /* Lop off the final slash (if any). */ |
| 487 | if (cp && !cp[1]) |
| 488 | *cp = '\0'; |
| 489 | |
| 490 | umask(orig_umask); |
| 491 | if (do_mkdir(dest_path, 0777) != 0) { |
| 492 | rsyserr(FERROR, errno, "mkdir %s failed", |
| 493 | full_fname(dest_path)); |
| 494 | exit_cleanup(RERR_FILEIO); |
| 495 | } |
| 496 | umask(0); |
| 497 | |
| 498 | if (verbose) |
| 499 | rprintf(FINFO, "created directory %s\n", dest_path); |
| 500 | |
| 501 | if (dry_run) { |
| 502 | /* Indicate that the destination directory doesn't |
| 503 | * really exist and return mode 1. */ |
| 504 | dry_run++; |
| 505 | return NULL; |
| 506 | } |
| 507 | |
| 508 | if (!push_dir(dest_path)) { |
| 509 | rsyserr(FERROR, errno, "push_dir#2 %s failed", |
| 510 | full_fname(dest_path)); |
| 511 | exit_cleanup(RERR_FILESELECT); |
| 512 | } |
| 513 | |
| 514 | return NULL; |
| 515 | } |
| 516 | |
| 517 | /* Otherwise, we are writing a single file, possibly on top of an |
| 518 | * existing non-directory. Change to the item's parent directory |
| 519 | * (if it has a path component), return the basename of the |
| 520 | * destination file as the local name, and use mode 2. */ |
| 521 | if (!cp) |
| 522 | return dest_path; |
| 523 | |
| 524 | if (cp == dest_path) |
| 525 | dest_path = "/"; |
| 526 | |
| 527 | *cp = '\0'; |
| 528 | if (!push_dir(dest_path)) { |
| 529 | rsyserr(FERROR, errno, "push_dir#3 %s failed", |
| 530 | full_fname(dest_path)); |
| 531 | exit_cleanup(RERR_FILESELECT); |
| 532 | } |
| 533 | *cp = '/'; |
| 534 | |
| 535 | return cp + 1; |
| 536 | } |
| 537 | |
| 538 | |
| 539 | /* This is only called by the sender. */ |
| 540 | static void read_final_goodbye(int f_in, int f_out) |
| 541 | { |
| 542 | int i; |
| 543 | |
| 544 | if (protocol_version < 29) |
| 545 | i = read_int(f_in); |
| 546 | else { |
| 547 | while ((i = read_int(f_in)) == the_file_list->count |
| 548 | && read_shortint(f_in) == ITEM_IS_NEW) { |
| 549 | /* Forward the keep-alive (no-op) to the receiver. */ |
| 550 | write_int(f_out, the_file_list->count); |
| 551 | write_shortint(f_out, ITEM_IS_NEW); |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | if (i != -1) { |
| 556 | rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n", |
| 557 | i, who_am_i()); |
| 558 | exit_cleanup(RERR_PROTOCOL); |
| 559 | } |
| 560 | } |
| 561 | |
| 562 | |
| 563 | static void do_server_sender(int f_in, int f_out, int argc, char *argv[]) |
| 564 | { |
| 565 | struct file_list *flist; |
| 566 | char *dir = argv[0]; |
| 567 | |
| 568 | if (verbose > 2) { |
| 569 | rprintf(FINFO, "server_sender starting pid=%ld\n", |
| 570 | (long)getpid()); |
| 571 | } |
| 572 | |
| 573 | if (am_daemon && lp_write_only(module_id)) { |
| 574 | rprintf(FERROR, "ERROR: module is write only\n"); |
| 575 | exit_cleanup(RERR_SYNTAX); |
| 576 | return; |
| 577 | } |
| 578 | if (am_daemon && lp_read_only(module_id) && remove_sent_files) { |
| 579 | rprintf(FERROR, |
| 580 | "ERROR: --remove-sent-files cannot be used with a read-only module\n"); |
| 581 | exit_cleanup(RERR_SYNTAX); |
| 582 | return; |
| 583 | } |
| 584 | |
| 585 | if (!relative_paths && !push_dir(dir)) { |
| 586 | rsyserr(FERROR, errno, "push_dir#3 %s failed", |
| 587 | full_fname(dir)); |
| 588 | exit_cleanup(RERR_FILESELECT); |
| 589 | } |
| 590 | argc--; |
| 591 | argv++; |
| 592 | |
| 593 | if (argc == 0 && (recurse || list_only)) { |
| 594 | argc = 1; |
| 595 | argv--; |
| 596 | argv[0] = "."; |
| 597 | } |
| 598 | |
| 599 | flist = send_file_list(f_out,argc,argv); |
| 600 | if (!flist || flist->count == 0) { |
| 601 | exit_cleanup(0); |
| 602 | } |
| 603 | the_file_list = flist; |
| 604 | |
| 605 | io_start_buffering_in(); |
| 606 | io_start_buffering_out(); |
| 607 | |
| 608 | send_files(flist,f_out,f_in); |
| 609 | io_flush(FULL_FLUSH); |
| 610 | handle_stats(f_out); |
| 611 | if (protocol_version >= 24) |
| 612 | read_final_goodbye(f_in, f_out); |
| 613 | io_flush(FULL_FLUSH); |
| 614 | exit_cleanup(0); |
| 615 | } |
| 616 | |
| 617 | |
| 618 | static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name) |
| 619 | { |
| 620 | int pid; |
| 621 | int exit_code = 0; |
| 622 | int error_pipe[2]; |
| 623 | |
| 624 | /* The receiving side mustn't obey this, or an existing symlink that |
| 625 | * points to an identical file won't be replaced by the referent. */ |
| 626 | copy_links = 0; |
| 627 | |
| 628 | if (preserve_hard_links) |
| 629 | init_hard_links(); |
| 630 | |
| 631 | if (fd_pair(error_pipe) < 0) { |
| 632 | rsyserr(FERROR, errno, "pipe failed in do_recv"); |
| 633 | exit_cleanup(RERR_IPC); |
| 634 | } |
| 635 | |
| 636 | io_flush(NORMAL_FLUSH); |
| 637 | |
| 638 | if ((pid = do_fork()) == -1) { |
| 639 | rsyserr(FERROR, errno, "fork failed in do_recv"); |
| 640 | exit_cleanup(RERR_IPC); |
| 641 | } |
| 642 | |
| 643 | if (pid == 0) { |
| 644 | close(error_pipe[0]); |
| 645 | if (f_in != f_out) |
| 646 | close(f_out); |
| 647 | |
| 648 | /* we can't let two processes write to the socket at one time */ |
| 649 | close_multiplexing_out(); |
| 650 | |
| 651 | /* set place to send errors */ |
| 652 | set_msg_fd_out(error_pipe[1]); |
| 653 | |
| 654 | recv_files(f_in, flist, local_name); |
| 655 | io_flush(FULL_FLUSH); |
| 656 | handle_stats(f_in); |
| 657 | |
| 658 | send_msg(MSG_DONE, "", 0); |
| 659 | io_flush(FULL_FLUSH); |
| 660 | |
| 661 | /* Handle any keep-alive packets from the post-processing work |
| 662 | * that the generator does. */ |
| 663 | if (protocol_version >= 29) { |
| 664 | kluge_around_eof = -1; |
| 665 | |
| 666 | /* This should only get stopped via a USR2 signal. */ |
| 667 | while (read_int(f_in) == flist->count |
| 668 | && read_shortint(f_in) == ITEM_IS_NEW) {} |
| 669 | |
| 670 | rprintf(FERROR, "Invalid packet at end of run [%s]\n", |
| 671 | who_am_i()); |
| 672 | exit_cleanup(RERR_PROTOCOL); |
| 673 | } |
| 674 | |
| 675 | /* Finally, we go to sleep until our parent kills us with a |
| 676 | * USR2 signal. We sleep for a short time, as on some OSes |
| 677 | * a signal won't interrupt a sleep! */ |
| 678 | while (1) |
| 679 | msleep(20); |
| 680 | } |
| 681 | |
| 682 | am_generator = 1; |
| 683 | close_multiplexing_in(); |
| 684 | if (write_batch && !am_server) |
| 685 | stop_write_batch(); |
| 686 | |
| 687 | close(error_pipe[1]); |
| 688 | if (f_in != f_out) |
| 689 | close(f_in); |
| 690 | |
| 691 | io_start_buffering_out(); |
| 692 | |
| 693 | set_msg_fd_in(error_pipe[0]); |
| 694 | |
| 695 | generate_files(f_out, flist, local_name); |
| 696 | |
| 697 | handle_stats(-1); |
| 698 | io_flush(FULL_FLUSH); |
| 699 | if (protocol_version >= 24) { |
| 700 | /* send a final goodbye message */ |
| 701 | write_int(f_out, -1); |
| 702 | } |
| 703 | io_flush(FULL_FLUSH); |
| 704 | |
| 705 | set_msg_fd_in(-1); |
| 706 | kill(pid, SIGUSR2); |
| 707 | wait_process_with_flush(pid, &exit_code); |
| 708 | return exit_code; |
| 709 | } |
| 710 | |
| 711 | |
| 712 | static void do_server_recv(int f_in, int f_out, int argc,char *argv[]) |
| 713 | { |
| 714 | int exit_code; |
| 715 | struct file_list *flist; |
| 716 | char *local_name = NULL; |
| 717 | char *dir = NULL; |
| 718 | int save_verbose = verbose; |
| 719 | |
| 720 | if (filesfrom_fd >= 0) { |
| 721 | /* We can't mix messages with files-from data on the socket, |
| 722 | * so temporarily turn off verbose messages. */ |
| 723 | verbose = 0; |
| 724 | } |
| 725 | |
| 726 | if (verbose > 2) { |
| 727 | rprintf(FINFO, "server_recv(%d) starting pid=%ld\n", |
| 728 | argc, (long)getpid()); |
| 729 | } |
| 730 | |
| 731 | if (am_daemon && lp_read_only(module_id)) { |
| 732 | rprintf(FERROR,"ERROR: module is read only\n"); |
| 733 | exit_cleanup(RERR_SYNTAX); |
| 734 | return; |
| 735 | } |
| 736 | |
| 737 | if (argc > 0) { |
| 738 | dir = argv[0]; |
| 739 | argc--; |
| 740 | argv++; |
| 741 | if (!am_daemon && !push_dir(dir)) { |
| 742 | rsyserr(FERROR, errno, "push_dir#4 %s failed", |
| 743 | full_fname(dir)); |
| 744 | exit_cleanup(RERR_FILESELECT); |
| 745 | } |
| 746 | } |
| 747 | |
| 748 | io_start_buffering_in(); |
| 749 | recv_filter_list(f_in); |
| 750 | |
| 751 | if (filesfrom_fd >= 0) { |
| 752 | /* We need to send the files-from names to the sender at the |
| 753 | * same time that we receive the file-list from them, so we |
| 754 | * need the IO routines to automatically write out the names |
| 755 | * onto our f_out socket as we read the file-list. This |
| 756 | * avoids both deadlock and extra delays/buffers. */ |
| 757 | io_set_filesfrom_fds(filesfrom_fd, f_out); |
| 758 | filesfrom_fd = -1; |
| 759 | } |
| 760 | |
| 761 | flist = recv_file_list(f_in); |
| 762 | verbose = save_verbose; |
| 763 | if (!flist) { |
| 764 | rprintf(FERROR,"server_recv: recv_file_list error\n"); |
| 765 | exit_cleanup(RERR_FILESELECT); |
| 766 | } |
| 767 | the_file_list = flist; |
| 768 | |
| 769 | if (argc > 0) |
| 770 | local_name = get_local_name(flist,argv[0]); |
| 771 | |
| 772 | exit_code = do_recv(f_in,f_out,flist,local_name); |
| 773 | exit_cleanup(exit_code); |
| 774 | } |
| 775 | |
| 776 | |
| 777 | int child_main(int argc, char *argv[]) |
| 778 | { |
| 779 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
| 780 | return 0; |
| 781 | } |
| 782 | |
| 783 | |
| 784 | void start_server(int f_in, int f_out, int argc, char *argv[]) |
| 785 | { |
| 786 | set_nonblocking(f_in); |
| 787 | set_nonblocking(f_out); |
| 788 | |
| 789 | io_set_sock_fds(f_in, f_out); |
| 790 | setup_protocol(f_out, f_in); |
| 791 | |
| 792 | if (protocol_version >= 23) |
| 793 | io_start_multiplex_out(); |
| 794 | |
| 795 | if (am_sender) { |
| 796 | keep_dirlinks = 0; /* Must be disabled on the sender. */ |
| 797 | if (need_messages_from_generator) |
| 798 | io_start_multiplex_in(); |
| 799 | |
| 800 | recv_filter_list(f_in); |
| 801 | do_server_sender(f_in, f_out, argc, argv); |
| 802 | } else { |
| 803 | do_server_recv(f_in, f_out, argc, argv); |
| 804 | } |
| 805 | exit_cleanup(0); |
| 806 | } |
| 807 | |
| 808 | |
| 809 | /* |
| 810 | * This is called once the connection has been negotiated. It is used |
| 811 | * for rsyncd, remote-shell, and local connections. |
| 812 | */ |
| 813 | int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[]) |
| 814 | { |
| 815 | struct file_list *flist = NULL; |
| 816 | int exit_code = 0, exit_code2 = 0; |
| 817 | char *local_name = NULL; |
| 818 | |
| 819 | cleanup_child_pid = pid; |
| 820 | if (!read_batch) { |
| 821 | set_nonblocking(f_in); |
| 822 | set_nonblocking(f_out); |
| 823 | } |
| 824 | |
| 825 | io_set_sock_fds(f_in, f_out); |
| 826 | setup_protocol(f_out,f_in); |
| 827 | |
| 828 | if (protocol_version >= 23 && !read_batch) |
| 829 | io_start_multiplex_in(); |
| 830 | |
| 831 | /* We set our stderr file handle to blocking because ssh might have |
| 832 | * set it to non-blocking. This can be particularly troublesome if |
| 833 | * stderr is a clone of stdout, because ssh would have set our stdout |
| 834 | * to non-blocking at the same time (which can easily cause us to lose |
| 835 | * output from our print statements). This kluge shouldn't cause ssh |
| 836 | * any problems for how we use it. Note also that we delayed setting |
| 837 | * this until after the above protocol setup so that we know for sure |
| 838 | * that ssh is done twiddling its file descriptors. */ |
| 839 | set_blocking(STDERR_FILENO); |
| 840 | |
| 841 | if (am_sender) { |
| 842 | keep_dirlinks = 0; /* Must be disabled on the sender. */ |
| 843 | io_start_buffering_out(); |
| 844 | if (!filesfrom_host) |
| 845 | set_msg_fd_in(f_in); |
| 846 | send_filter_list(f_out); |
| 847 | if (filesfrom_host) |
| 848 | filesfrom_fd = f_in; |
| 849 | |
| 850 | if (write_batch && !am_server) |
| 851 | start_write_batch(f_out); |
| 852 | flist = send_file_list(f_out, argc, argv); |
| 853 | set_msg_fd_in(-1); |
| 854 | if (verbose > 3) |
| 855 | rprintf(FINFO,"file list sent\n"); |
| 856 | the_file_list = flist; |
| 857 | |
| 858 | io_flush(NORMAL_FLUSH); |
| 859 | send_files(flist,f_out,f_in); |
| 860 | io_flush(FULL_FLUSH); |
| 861 | handle_stats(-1); |
| 862 | if (protocol_version >= 24) |
| 863 | read_final_goodbye(f_in, f_out); |
| 864 | if (pid != -1) { |
| 865 | if (verbose > 3) |
| 866 | rprintf(FINFO,"client_run waiting on %d\n", (int) pid); |
| 867 | io_flush(FULL_FLUSH); |
| 868 | wait_process_with_flush(pid, &exit_code); |
| 869 | } |
| 870 | output_summary(); |
| 871 | io_flush(FULL_FLUSH); |
| 872 | exit_cleanup(exit_code); |
| 873 | } |
| 874 | |
| 875 | if (need_messages_from_generator && !read_batch) |
| 876 | io_start_multiplex_out(); |
| 877 | |
| 878 | if (argc == 0) |
| 879 | list_only |= 1; |
| 880 | |
| 881 | send_filter_list(read_batch ? -1 : f_out); |
| 882 | |
| 883 | if (filesfrom_fd >= 0) { |
| 884 | io_set_filesfrom_fds(filesfrom_fd, f_out); |
| 885 | filesfrom_fd = -1; |
| 886 | } |
| 887 | |
| 888 | if (write_batch && !am_server) |
| 889 | start_write_batch(f_in); |
| 890 | flist = recv_file_list(f_in); |
| 891 | the_file_list = flist; |
| 892 | |
| 893 | if (flist && flist->count > 0) { |
| 894 | local_name = get_local_name(flist, argv[0]); |
| 895 | |
| 896 | exit_code2 = do_recv(f_in, f_out, flist, local_name); |
| 897 | } else { |
| 898 | handle_stats(-1); |
| 899 | output_summary(); |
| 900 | } |
| 901 | |
| 902 | if (pid != -1) { |
| 903 | if (verbose > 3) |
| 904 | rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid); |
| 905 | io_flush(FULL_FLUSH); |
| 906 | wait_process_with_flush(pid, &exit_code); |
| 907 | } |
| 908 | |
| 909 | return MAX(exit_code, exit_code2); |
| 910 | } |
| 911 | |
| 912 | static int copy_argv (char *argv[]) |
| 913 | { |
| 914 | int i; |
| 915 | |
| 916 | for (i = 0; argv[i]; i++) { |
| 917 | if (!(argv[i] = strdup(argv[i]))) { |
| 918 | rprintf (FERROR, "out of memory at %s(%d)\n", |
| 919 | __FILE__, __LINE__); |
| 920 | return RERR_MALLOC; |
| 921 | } |
| 922 | } |
| 923 | |
| 924 | return 0; |
| 925 | } |
| 926 | |
| 927 | |
| 928 | /** |
| 929 | * Start a client for either type of remote connection. Work out |
| 930 | * whether the arguments request a remote shell or rsyncd connection, |
| 931 | * and call the appropriate connection function, then run_client. |
| 932 | * |
| 933 | * Calls either start_socket_client (for sockets) or do_cmd and |
| 934 | * client_run (for ssh). |
| 935 | **/ |
| 936 | static int start_client(int argc, char *argv[]) |
| 937 | { |
| 938 | char *p; |
| 939 | char *shell_machine = NULL; |
| 940 | char *shell_path = NULL; |
| 941 | char *shell_user = NULL; |
| 942 | int ret; |
| 943 | pid_t pid; |
| 944 | int f_in,f_out; |
| 945 | int rc; |
| 946 | |
| 947 | /* Don't clobber argv[] so that ps(1) can still show the right |
| 948 | * command line. */ |
| 949 | if ((rc = copy_argv(argv))) |
| 950 | return rc; |
| 951 | |
| 952 | if (!read_batch) { /* for read_batch, NO source is specified */ |
| 953 | argc--; |
| 954 | shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port); |
| 955 | if (shell_path) { /* source is remote */ |
| 956 | char *dummy1; |
| 957 | int dummy2; |
| 958 | if (argc && check_for_hostspec(argv[argc], &dummy1, &dummy2)) { |
| 959 | rprintf(FERROR, |
| 960 | "The source and destination cannot both be remote.\n"); |
| 961 | exit_cleanup(RERR_SYNTAX); |
| 962 | } |
| 963 | argv++; |
| 964 | if (filesfrom_host && *filesfrom_host |
| 965 | && strcmp(filesfrom_host, shell_machine) != 0) { |
| 966 | rprintf(FERROR, |
| 967 | "--files-from hostname is not the same as the transfer hostname\n"); |
| 968 | exit_cleanup(RERR_SYNTAX); |
| 969 | } |
| 970 | if (rsync_port) { |
| 971 | if (!shell_cmd) { |
| 972 | return start_socket_client(shell_machine, |
| 973 | shell_path, |
| 974 | argc, argv); |
| 975 | } |
| 976 | daemon_over_rsh = 1; |
| 977 | } |
| 978 | |
| 979 | am_sender = 0; |
| 980 | } else { /* source is local, check dest arg */ |
| 981 | am_sender = 1; |
| 982 | |
| 983 | if (argc < 1) { /* destination required */ |
| 984 | usage(FERROR); |
| 985 | exit_cleanup(RERR_SYNTAX); |
| 986 | } |
| 987 | |
| 988 | shell_path = check_for_hostspec(argv[argc], &shell_machine, &rsync_port); |
| 989 | if (shell_path && filesfrom_host && *filesfrom_host |
| 990 | && strcmp(filesfrom_host, shell_machine) != 0) { |
| 991 | rprintf(FERROR, |
| 992 | "--files-from hostname is not the same as the transfer hostname\n"); |
| 993 | exit_cleanup(RERR_SYNTAX); |
| 994 | } |
| 995 | if (!shell_path) { /* no hostspec found, so src & dest are local */ |
| 996 | local_server = 1; |
| 997 | if (filesfrom_host) { |
| 998 | rprintf(FERROR, |
| 999 | "--files-from cannot be remote when the transfer is local\n"); |
| 1000 | exit_cleanup(RERR_SYNTAX); |
| 1001 | } |
| 1002 | shell_machine = NULL; |
| 1003 | shell_path = argv[argc]; |
| 1004 | } else if (rsync_port) { |
| 1005 | if (!shell_cmd) { |
| 1006 | return start_socket_client(shell_machine, |
| 1007 | shell_path, |
| 1008 | argc, argv); |
| 1009 | } |
| 1010 | daemon_over_rsh = 1; |
| 1011 | } |
| 1012 | } |
| 1013 | } else { /* read_batch */ |
| 1014 | local_server = 1; |
| 1015 | shell_path = argv[argc-1]; |
| 1016 | if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) { |
| 1017 | rprintf(FERROR, "remote destination is not allowed with --read-batch\n"); |
| 1018 | exit_cleanup(RERR_SYNTAX); |
| 1019 | } |
| 1020 | } |
| 1021 | |
| 1022 | if (shell_machine) { |
| 1023 | p = strrchr(shell_machine,'@'); |
| 1024 | if (p) { |
| 1025 | *p = 0; |
| 1026 | shell_user = shell_machine; |
| 1027 | shell_machine = p+1; |
| 1028 | } |
| 1029 | } |
| 1030 | |
| 1031 | if (verbose > 3) { |
| 1032 | rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n", |
| 1033 | shell_cmd ? shell_cmd : "", |
| 1034 | shell_machine ? shell_machine : "", |
| 1035 | shell_user ? shell_user : "", |
| 1036 | shell_path ? shell_path : ""); |
| 1037 | } |
| 1038 | |
| 1039 | /* for remote source, only single dest arg can remain ... */ |
| 1040 | if (!am_sender && argc > 1) { |
| 1041 | usage(FERROR); |
| 1042 | exit_cleanup(RERR_SYNTAX); |
| 1043 | } |
| 1044 | |
| 1045 | /* ... or no dest at all */ |
| 1046 | if (!am_sender && argc == 0) |
| 1047 | list_only |= 1; |
| 1048 | |
| 1049 | pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path, |
| 1050 | &f_in,&f_out); |
| 1051 | |
| 1052 | /* if we're running an rsync server on the remote host over a |
| 1053 | * remote shell command, we need to do the RSYNCD protocol first */ |
| 1054 | if (daemon_over_rsh) { |
| 1055 | int tmpret; |
| 1056 | tmpret = start_inband_exchange(shell_user, shell_path, |
| 1057 | f_in, f_out, argc); |
| 1058 | if (tmpret < 0) |
| 1059 | return tmpret; |
| 1060 | } |
| 1061 | |
| 1062 | ret = client_run(f_in, f_out, pid, argc, argv); |
| 1063 | |
| 1064 | fflush(stdout); |
| 1065 | fflush(stderr); |
| 1066 | |
| 1067 | return ret; |
| 1068 | } |
| 1069 | |
| 1070 | |
| 1071 | static RETSIGTYPE sigusr1_handler(UNUSED(int val)) |
| 1072 | { |
| 1073 | exit_cleanup(RERR_SIGNAL1); |
| 1074 | } |
| 1075 | |
| 1076 | static RETSIGTYPE sigusr2_handler(UNUSED(int val)) |
| 1077 | { |
| 1078 | if (!am_server) |
| 1079 | output_summary(); |
| 1080 | close_all(); |
| 1081 | if (log_got_error) |
| 1082 | _exit(RERR_PARTIAL); |
| 1083 | _exit(0); |
| 1084 | } |
| 1085 | |
| 1086 | static RETSIGTYPE sigchld_handler(UNUSED(int val)) |
| 1087 | { |
| 1088 | #ifdef WNOHANG |
| 1089 | int cnt, status; |
| 1090 | pid_t pid; |
| 1091 | /* An empty waitpid() loop was put here by Tridge and we could never |
| 1092 | * get him to explain why he put it in, so rather than taking it |
| 1093 | * out we're instead saving the child exit statuses for later use. |
| 1094 | * The waitpid() loop presumably eliminates all possibility of leaving |
| 1095 | * zombie children, maybe that's why he did it. */ |
| 1096 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) { |
| 1097 | /* save the child's exit status */ |
| 1098 | for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { |
| 1099 | if (pid_stat_table[cnt].pid == 0) { |
| 1100 | pid_stat_table[cnt].pid = pid; |
| 1101 | pid_stat_table[cnt].status = status; |
| 1102 | break; |
| 1103 | } |
| 1104 | } |
| 1105 | } |
| 1106 | #endif |
| 1107 | #if !defined HAVE_SIGACTION && !defined HAVE_SIGPROCMASK |
| 1108 | signal(SIGCHLD, sigchld_handler); |
| 1109 | #endif |
| 1110 | } |
| 1111 | |
| 1112 | |
| 1113 | /** |
| 1114 | * This routine catches signals and tries to send them to gdb. |
| 1115 | * |
| 1116 | * Because it's called from inside a signal handler it ought not to |
| 1117 | * use too many library routines. |
| 1118 | * |
| 1119 | * @todo Perhaps use "screen -X" instead/as well, to help people |
| 1120 | * debugging without easy access to X. Perhaps use an environment |
| 1121 | * variable, or just call a script? |
| 1122 | * |
| 1123 | * @todo The /proc/ magic probably only works on Linux (and |
| 1124 | * Solaris?) Can we be more portable? |
| 1125 | **/ |
| 1126 | #ifdef MAINTAINER_MODE |
| 1127 | const char *get_panic_action(void) |
| 1128 | { |
| 1129 | const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION"); |
| 1130 | |
| 1131 | if (cmd_fmt) |
| 1132 | return cmd_fmt; |
| 1133 | else |
| 1134 | return "xterm -display :0 -T Panic -n Panic " |
| 1135 | "-e gdb /proc/%d/exe %d"; |
| 1136 | } |
| 1137 | |
| 1138 | |
| 1139 | /** |
| 1140 | * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION. |
| 1141 | * |
| 1142 | * This signal handler is only installed if we were configured with |
| 1143 | * --enable-maintainer-mode. Perhaps it should always be on and we |
| 1144 | * should just look at the environment variable, but I'm a bit leery |
| 1145 | * of a signal sending us into a busy loop. |
| 1146 | **/ |
| 1147 | static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig)) |
| 1148 | { |
| 1149 | char cmd_buf[300]; |
| 1150 | int ret; |
| 1151 | |
| 1152 | sprintf(cmd_buf, get_panic_action(), |
| 1153 | getpid(), getpid()); |
| 1154 | |
| 1155 | /* Unless we failed to execute gdb, we allow the process to |
| 1156 | * continue. I'm not sure if that's right. */ |
| 1157 | ret = system(cmd_buf); |
| 1158 | if (ret) |
| 1159 | _exit(ret); |
| 1160 | } |
| 1161 | #endif |
| 1162 | |
| 1163 | |
| 1164 | int main(int argc,char *argv[]) |
| 1165 | { |
| 1166 | int ret; |
| 1167 | int orig_argc = argc; |
| 1168 | char **orig_argv = argv; |
| 1169 | #if defined HAVE_SIGACTION && defined HAVE_SIGPROCMASK |
| 1170 | sigset_t sigmask; |
| 1171 | |
| 1172 | sigemptyset(&sigmask); |
| 1173 | sigact.sa_flags = SA_NOCLDSTOP; |
| 1174 | #endif |
| 1175 | SIGACTMASK(SIGUSR1, sigusr1_handler); |
| 1176 | SIGACTMASK(SIGUSR2, sigusr2_handler); |
| 1177 | SIGACTMASK(SIGCHLD, sigchld_handler); |
| 1178 | #ifdef MAINTAINER_MODE |
| 1179 | SIGACTMASK(SIGSEGV, rsync_panic_handler); |
| 1180 | SIGACTMASK(SIGFPE, rsync_panic_handler); |
| 1181 | SIGACTMASK(SIGABRT, rsync_panic_handler); |
| 1182 | SIGACTMASK(SIGBUS, rsync_panic_handler); |
| 1183 | #endif |
| 1184 | |
| 1185 | starttime = time(NULL); |
| 1186 | am_root = (MY_UID() == 0); |
| 1187 | |
| 1188 | memset(&stats, 0, sizeof(stats)); |
| 1189 | |
| 1190 | if (argc < 2) { |
| 1191 | usage(FERROR); |
| 1192 | exit_cleanup(RERR_SYNTAX); |
| 1193 | } |
| 1194 | |
| 1195 | /* we set a 0 umask so that correct file permissions can be |
| 1196 | * carried across */ |
| 1197 | orig_umask = (int)umask(0); |
| 1198 | |
| 1199 | #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE |
| 1200 | setlocale(LC_CTYPE, ""); |
| 1201 | #endif |
| 1202 | |
| 1203 | if (!parse_arguments(&argc, (const char ***) &argv, 1)) { |
| 1204 | /* FIXME: We ought to call the same error-handling |
| 1205 | * code here, rather than relying on getopt. */ |
| 1206 | option_error(); |
| 1207 | exit_cleanup(RERR_SYNTAX); |
| 1208 | } |
| 1209 | |
| 1210 | SIGACTMASK(SIGINT, sig_int); |
| 1211 | SIGACTMASK(SIGHUP, sig_int); |
| 1212 | SIGACTMASK(SIGTERM, sig_int); |
| 1213 | #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK |
| 1214 | sigprocmask(SIG_UNBLOCK, &sigmask, NULL); |
| 1215 | #endif |
| 1216 | |
| 1217 | /* Ignore SIGPIPE; we consistently check error codes and will |
| 1218 | * see the EPIPE. */ |
| 1219 | SIGACTION(SIGPIPE, SIG_IGN); |
| 1220 | |
| 1221 | /* Initialize push_dir here because on some old systems getcwd |
| 1222 | * (implemented by forking "pwd" and reading its output) doesn't |
| 1223 | * work when there are other child processes. Also, on all systems |
| 1224 | * that implement getcwd that way "pwd" can't be found after chroot. */ |
| 1225 | push_dir(NULL); |
| 1226 | |
| 1227 | init_flist(); |
| 1228 | |
| 1229 | if ((write_batch || read_batch) && !am_server) { |
| 1230 | if (write_batch) |
| 1231 | write_batch_shell_file(orig_argc, orig_argv, argc); |
| 1232 | |
| 1233 | if (read_batch && strcmp(batch_name, "-") == 0) |
| 1234 | batch_fd = STDIN_FILENO; |
| 1235 | else { |
| 1236 | batch_fd = do_open(batch_name, |
| 1237 | write_batch ? O_WRONLY | O_CREAT | O_TRUNC |
| 1238 | : O_RDONLY, S_IRUSR | S_IWUSR); |
| 1239 | } |
| 1240 | if (batch_fd < 0) { |
| 1241 | rsyserr(FERROR, errno, "Batch file %s open error", |
| 1242 | full_fname(batch_name)); |
| 1243 | exit_cleanup(RERR_FILEIO); |
| 1244 | } |
| 1245 | if (read_batch) |
| 1246 | read_stream_flags(batch_fd); |
| 1247 | } |
| 1248 | if (write_batch < 0) |
| 1249 | dry_run = 1; |
| 1250 | |
| 1251 | if (am_daemon && !am_server) |
| 1252 | return daemon_main(); |
| 1253 | |
| 1254 | if (argc < 1) { |
| 1255 | usage(FERROR); |
| 1256 | exit_cleanup(RERR_SYNTAX); |
| 1257 | } |
| 1258 | |
| 1259 | if (am_server) { |
| 1260 | set_nonblocking(STDIN_FILENO); |
| 1261 | set_nonblocking(STDOUT_FILENO); |
| 1262 | if (am_daemon) |
| 1263 | return start_daemon(STDIN_FILENO, STDOUT_FILENO); |
| 1264 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
| 1265 | } |
| 1266 | |
| 1267 | ret = start_client(argc, argv); |
| 1268 | if (ret == -1) |
| 1269 | exit_cleanup(RERR_STARTCLIENT); |
| 1270 | else |
| 1271 | exit_cleanup(ret); |
| 1272 | |
| 1273 | return ret; |
| 1274 | } |