| 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 | |
| 24 | time_t starttime = 0; |
| 25 | |
| 26 | extern struct stats stats; |
| 27 | extern int am_root; |
| 28 | extern int am_server; |
| 29 | extern int am_sender; |
| 30 | extern int am_generator; |
| 31 | extern int am_daemon; |
| 32 | extern int verbose; |
| 33 | extern int blocking_io; |
| 34 | extern int cvs_exclude; |
| 35 | extern int delete_mode; |
| 36 | extern int delete_excluded; |
| 37 | extern int delete_after; |
| 38 | extern int daemon_over_rsh; |
| 39 | extern int do_stats; |
| 40 | extern int dry_run; |
| 41 | extern int list_only; |
| 42 | extern int local_server; |
| 43 | extern int log_got_error; |
| 44 | extern int module_id; |
| 45 | extern int orig_umask; |
| 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 read_batch; |
| 52 | extern int write_batch; |
| 53 | extern int filesfrom_fd; |
| 54 | extern pid_t cleanup_child_pid; |
| 55 | extern char *files_from; |
| 56 | extern char *remote_filesfrom_file; |
| 57 | extern char *rsync_path; |
| 58 | extern char *shell_cmd; |
| 59 | extern struct file_list *batch_flist; |
| 60 | |
| 61 | |
| 62 | /* there's probably never more than at most 2 outstanding child processes, |
| 63 | * but set it higher just in case. |
| 64 | */ |
| 65 | #define MAXCHILDPROCS 5 |
| 66 | |
| 67 | struct pid_status { |
| 68 | pid_t pid; |
| 69 | int status; |
| 70 | } pid_stat_table[MAXCHILDPROCS]; |
| 71 | |
| 72 | static void show_malloc_stats(void); |
| 73 | |
| 74 | /**************************************************************************** |
| 75 | wait for a process to exit, calling io_flush while waiting |
| 76 | ****************************************************************************/ |
| 77 | void wait_process(pid_t pid, int *status) |
| 78 | { |
| 79 | pid_t waited_pid; |
| 80 | int cnt; |
| 81 | |
| 82 | while ((waited_pid = waitpid(pid, status, WNOHANG)) == 0) { |
| 83 | msleep(20); |
| 84 | io_flush(FULL_FLUSH); |
| 85 | } |
| 86 | |
| 87 | if ((waited_pid == -1) && (errno == ECHILD)) { |
| 88 | /* status of requested child no longer available. |
| 89 | * check to see if it was processed by the sigchld_handler. |
| 90 | */ |
| 91 | for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { |
| 92 | if (pid == pid_stat_table[cnt].pid) { |
| 93 | *status = pid_stat_table[cnt].status; |
| 94 | pid_stat_table[cnt].pid = 0; |
| 95 | break; |
| 96 | } |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | /* TODO: If the child exited on a signal, then log an |
| 101 | * appropriate error message. Perhaps we should also accept a |
| 102 | * message describing the purpose of the child. Also indicate |
| 103 | * this to the caller so that thhey know something went |
| 104 | * wrong. */ |
| 105 | *status = WEXITSTATUS(*status); |
| 106 | } |
| 107 | |
| 108 | static void report(int f) |
| 109 | { |
| 110 | time_t t = time(NULL); |
| 111 | int send_stats; |
| 112 | |
| 113 | if (do_stats && verbose > 1) { |
| 114 | /* These come out from every process */ |
| 115 | show_malloc_stats(); |
| 116 | show_flist_stats(); |
| 117 | } |
| 118 | |
| 119 | if (am_daemon) { |
| 120 | log_exit(0, __FILE__, __LINE__); |
| 121 | if (f == -1 || !am_sender) return; |
| 122 | } |
| 123 | |
| 124 | send_stats = verbose || protocol_version >= 20; |
| 125 | if (am_server) { |
| 126 | if (am_sender && send_stats) { |
| 127 | int64 w; |
| 128 | /* store total_written in a temporary |
| 129 | * because write_longint changes it */ |
| 130 | w = stats.total_written; |
| 131 | write_longint(f,stats.total_read); |
| 132 | write_longint(f,w); |
| 133 | write_longint(f,stats.total_size); |
| 134 | } |
| 135 | return; |
| 136 | } |
| 137 | |
| 138 | /* this is the client */ |
| 139 | |
| 140 | if (!am_sender && send_stats) { |
| 141 | int64 r; |
| 142 | stats.total_written = read_longint(f); |
| 143 | /* store total_read in a temporary, read_longint changes it */ |
| 144 | r = read_longint(f); |
| 145 | stats.total_size = read_longint(f); |
| 146 | stats.total_read = r; |
| 147 | } |
| 148 | |
| 149 | if (do_stats) { |
| 150 | if (!am_sender && !send_stats) { |
| 151 | /* missing the bytes written by the generator */ |
| 152 | rprintf(FINFO, "\nCannot show stats as receiver because remote protocol version is less than 20\n"); |
| 153 | rprintf(FINFO, "Use --stats -v to show stats\n"); |
| 154 | return; |
| 155 | } |
| 156 | rprintf(FINFO,"\nNumber of files: %d\n", stats.num_files); |
| 157 | rprintf(FINFO,"Number of files transferred: %d\n", |
| 158 | stats.num_transferred_files); |
| 159 | rprintf(FINFO,"Total file size: %.0f bytes\n", |
| 160 | (double)stats.total_size); |
| 161 | rprintf(FINFO,"Total transferred file size: %.0f bytes\n", |
| 162 | (double)stats.total_transferred_size); |
| 163 | rprintf(FINFO,"Literal data: %.0f bytes\n", |
| 164 | (double)stats.literal_data); |
| 165 | rprintf(FINFO,"Matched data: %.0f bytes\n", |
| 166 | (double)stats.matched_data); |
| 167 | rprintf(FINFO,"File list size: %d\n", stats.flist_size); |
| 168 | rprintf(FINFO,"Total bytes written: %.0f\n", |
| 169 | (double)stats.total_written); |
| 170 | rprintf(FINFO,"Total bytes read: %.0f\n", |
| 171 | (double)stats.total_read); |
| 172 | } |
| 173 | |
| 174 | if (verbose || do_stats) { |
| 175 | rprintf(FINFO,"\nwrote %.0f bytes read %.0f bytes %.2f bytes/sec\n", |
| 176 | (double)stats.total_written, |
| 177 | (double)stats.total_read, |
| 178 | (stats.total_written+stats.total_read)/(0.5 + (t-starttime))); |
| 179 | rprintf(FINFO,"total size is %.0f speedup is %.2f\n", |
| 180 | (double)stats.total_size, |
| 181 | (1.0*stats.total_size)/(stats.total_written+stats.total_read)); |
| 182 | } |
| 183 | |
| 184 | fflush(stdout); |
| 185 | fflush(stderr); |
| 186 | } |
| 187 | |
| 188 | |
| 189 | /** |
| 190 | * If our C library can get malloc statistics, then show them to FINFO |
| 191 | **/ |
| 192 | static void show_malloc_stats(void) |
| 193 | { |
| 194 | #ifdef HAVE_MALLINFO |
| 195 | struct mallinfo mi; |
| 196 | |
| 197 | mi = mallinfo(); |
| 198 | |
| 199 | rprintf(FINFO, "\n" RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n", |
| 200 | getpid(), |
| 201 | am_server ? "server " : "", |
| 202 | am_daemon ? "daemon " : "", |
| 203 | who_am_i()); |
| 204 | rprintf(FINFO, " arena: %10d (bytes from sbrk)\n", mi.arena); |
| 205 | rprintf(FINFO, " ordblks: %10d (chunks not in use)\n", mi.ordblks); |
| 206 | rprintf(FINFO, " smblks: %10d\n", mi.smblks); |
| 207 | rprintf(FINFO, " hblks: %10d (chunks from mmap)\n", mi.hblks); |
| 208 | rprintf(FINFO, " hblkhd: %10d (bytes from mmap)\n", mi.hblkhd); |
| 209 | rprintf(FINFO, " usmblks: %10d\n", mi.usmblks); |
| 210 | rprintf(FINFO, " fsmblks: %10d\n", mi.fsmblks); |
| 211 | rprintf(FINFO, " uordblks: %10d (bytes used)\n", mi.uordblks); |
| 212 | rprintf(FINFO, " fordblks: %10d (bytes free)\n", mi.fordblks); |
| 213 | rprintf(FINFO, " keepcost: %10d (bytes in releasable chunk)\n", mi.keepcost); |
| 214 | #endif /* HAVE_MALLINFO */ |
| 215 | } |
| 216 | |
| 217 | |
| 218 | /* Start the remote shell. cmd may be NULL to use the default. */ |
| 219 | static pid_t do_cmd(char *cmd,char *machine,char *user,char *path,int *f_in,int *f_out) |
| 220 | { |
| 221 | char *args[100]; |
| 222 | int i,argc=0; |
| 223 | pid_t ret; |
| 224 | char *tok,*dir=NULL; |
| 225 | int dash_l_set = 0; |
| 226 | |
| 227 | if (!read_batch && !local_server) { |
| 228 | char *rsh_env = getenv(RSYNC_RSH_ENV); |
| 229 | if (!cmd) |
| 230 | cmd = rsh_env; |
| 231 | if (!cmd) |
| 232 | cmd = RSYNC_RSH; |
| 233 | cmd = strdup(cmd); |
| 234 | if (!cmd) |
| 235 | goto oom; |
| 236 | |
| 237 | for (tok=strtok(cmd," ");tok;tok=strtok(NULL," ")) { |
| 238 | args[argc++] = tok; |
| 239 | } |
| 240 | |
| 241 | /* check to see if we've already been given '-l user' in |
| 242 | * the remote-shell command */ |
| 243 | for (i = 0; i < argc-1; i++) { |
| 244 | if (!strcmp(args[i], "-l") && args[i+1][0] != '-') |
| 245 | dash_l_set = 1; |
| 246 | } |
| 247 | |
| 248 | #if HAVE_REMSH |
| 249 | /* remsh (on HPUX) takes the arguments the other way around */ |
| 250 | args[argc++] = machine; |
| 251 | if (user && !(daemon_over_rsh && dash_l_set)) { |
| 252 | args[argc++] = "-l"; |
| 253 | args[argc++] = user; |
| 254 | } |
| 255 | #else |
| 256 | if (user && !(daemon_over_rsh && dash_l_set)) { |
| 257 | args[argc++] = "-l"; |
| 258 | args[argc++] = user; |
| 259 | } |
| 260 | args[argc++] = machine; |
| 261 | #endif |
| 262 | |
| 263 | args[argc++] = rsync_path; |
| 264 | |
| 265 | if (blocking_io < 0) { |
| 266 | char *cp; |
| 267 | if ((cp = strrchr(cmd, '/')) != NULL) |
| 268 | cp++; |
| 269 | else |
| 270 | cp = cmd; |
| 271 | if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0) |
| 272 | blocking_io = 1; |
| 273 | } |
| 274 | |
| 275 | server_options(args,&argc); |
| 276 | } |
| 277 | |
| 278 | args[argc++] = "."; |
| 279 | |
| 280 | if (!daemon_over_rsh && path && *path) |
| 281 | args[argc++] = path; |
| 282 | |
| 283 | args[argc] = NULL; |
| 284 | |
| 285 | if (verbose > 3) { |
| 286 | rprintf(FINFO,"cmd="); |
| 287 | for (i=0;i<argc;i++) |
| 288 | rprintf(FINFO,"%s ",args[i]); |
| 289 | rprintf(FINFO,"\n"); |
| 290 | } |
| 291 | |
| 292 | if (local_server) { |
| 293 | if (read_batch) |
| 294 | create_flist_from_batch(); /* sets batch_flist */ |
| 295 | ret = local_child(argc, args, f_in, f_out, child_main); |
| 296 | } else { |
| 297 | ret = piped_child(args,f_in,f_out); |
| 298 | } |
| 299 | |
| 300 | if (dir) free(dir); |
| 301 | |
| 302 | return ret; |
| 303 | |
| 304 | oom: |
| 305 | out_of_memory("do_cmd"); |
| 306 | return 0; /* not reached */ |
| 307 | } |
| 308 | |
| 309 | |
| 310 | static char *get_local_name(struct file_list *flist,char *name) |
| 311 | { |
| 312 | STRUCT_STAT st; |
| 313 | int e; |
| 314 | |
| 315 | if (verbose > 2) |
| 316 | rprintf(FINFO,"get_local_name count=%d %s\n", |
| 317 | flist->count, NS(name)); |
| 318 | |
| 319 | if (!name) |
| 320 | return NULL; |
| 321 | |
| 322 | if (do_stat(name,&st) == 0) { |
| 323 | if (S_ISDIR(st.st_mode)) { |
| 324 | if (!push_dir(name)) { |
| 325 | rprintf(FERROR, "push_dir %s failed: %s (1)\n", |
| 326 | full_fname(name), strerror(errno)); |
| 327 | exit_cleanup(RERR_FILESELECT); |
| 328 | } |
| 329 | return NULL; |
| 330 | } |
| 331 | if (flist->count > 1) { |
| 332 | rprintf(FERROR,"ERROR: destination must be a directory when copying more than 1 file\n"); |
| 333 | exit_cleanup(RERR_FILESELECT); |
| 334 | } |
| 335 | return name; |
| 336 | } |
| 337 | |
| 338 | if (flist->count <= 1 && ((e = strlen(name)) <= 1 || name[e-1] != '/')) |
| 339 | return name; |
| 340 | |
| 341 | if (do_mkdir(name,0777 & ~orig_umask) != 0) { |
| 342 | rprintf(FERROR, "mkdir %s failed: %s\n", |
| 343 | full_fname(name), strerror(errno)); |
| 344 | exit_cleanup(RERR_FILEIO); |
| 345 | } else { |
| 346 | if (verbose > 0) |
| 347 | rprintf(FINFO,"created directory %s\n",name); |
| 348 | } |
| 349 | |
| 350 | if (!push_dir(name)) { |
| 351 | rprintf(FERROR, "push_dir %s failed: %s (2)\n", |
| 352 | full_fname(name), strerror(errno)); |
| 353 | exit_cleanup(RERR_FILESELECT); |
| 354 | } |
| 355 | |
| 356 | return NULL; |
| 357 | } |
| 358 | |
| 359 | |
| 360 | static void do_server_sender(int f_in, int f_out, int argc,char *argv[]) |
| 361 | { |
| 362 | int i; |
| 363 | struct file_list *flist; |
| 364 | char *dir = argv[0]; |
| 365 | |
| 366 | if (verbose > 2) { |
| 367 | rprintf(FINFO, "server_sender starting pid=%ld\n", |
| 368 | (long)getpid()); |
| 369 | } |
| 370 | |
| 371 | if (!relative_paths && !push_dir(dir)) { |
| 372 | rprintf(FERROR, "push_dir %s failed: %s (3)\n", |
| 373 | full_fname(dir), strerror(errno)); |
| 374 | exit_cleanup(RERR_FILESELECT); |
| 375 | } |
| 376 | argc--; |
| 377 | argv++; |
| 378 | |
| 379 | if (strcmp(dir,".")) { |
| 380 | int l = strlen(dir); |
| 381 | if (strcmp(dir,"/") == 0) |
| 382 | l = 0; |
| 383 | for (i=0;i<argc;i++) |
| 384 | argv[i] += l+1; |
| 385 | } |
| 386 | |
| 387 | if (argc == 0 && recurse) { |
| 388 | argc=1; |
| 389 | argv--; |
| 390 | argv[0] = "."; |
| 391 | } |
| 392 | |
| 393 | flist = send_file_list(f_out,argc,argv); |
| 394 | if (!flist || flist->count == 0) { |
| 395 | exit_cleanup(0); |
| 396 | } |
| 397 | |
| 398 | io_start_buffering_in(f_in); |
| 399 | io_start_buffering_out(f_out); |
| 400 | send_files(flist,f_out,f_in); |
| 401 | io_flush(FULL_FLUSH); |
| 402 | report(f_out); |
| 403 | if (protocol_version >= 24) { |
| 404 | /* final goodbye message */ |
| 405 | read_int(f_in); |
| 406 | } |
| 407 | io_flush(FULL_FLUSH); |
| 408 | exit_cleanup(0); |
| 409 | } |
| 410 | |
| 411 | |
| 412 | static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name) |
| 413 | { |
| 414 | int pid; |
| 415 | int status=0; |
| 416 | int error_pipe[2]; |
| 417 | |
| 418 | if (preserve_hard_links) |
| 419 | init_hard_links(flist); |
| 420 | |
| 421 | if (!delete_after) { |
| 422 | /* I moved this here from recv_files() to prevent a race condition */ |
| 423 | if (recurse && delete_mode && !local_name && flist->count>0) { |
| 424 | delete_files(flist); |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | if (fd_pair(error_pipe) < 0) { |
| 429 | rprintf(FERROR,"error pipe failed in do_recv\n"); |
| 430 | exit_cleanup(RERR_SOCKETIO); |
| 431 | } |
| 432 | |
| 433 | io_flush(NORMAL_FLUSH); |
| 434 | |
| 435 | if ((pid=do_fork()) == 0) { |
| 436 | close(error_pipe[0]); |
| 437 | if (f_in != f_out) close(f_out); |
| 438 | |
| 439 | /* we can't let two processes write to the socket at one time */ |
| 440 | io_multiplexing_close(); |
| 441 | |
| 442 | /* set place to send errors */ |
| 443 | set_msg_fd_out(error_pipe[1]); |
| 444 | |
| 445 | recv_files(f_in,flist,local_name); |
| 446 | io_flush(FULL_FLUSH); |
| 447 | report(f_in); |
| 448 | |
| 449 | send_msg(MSG_DONE, "", 0); |
| 450 | io_flush(FULL_FLUSH); |
| 451 | /* finally we go to sleep until our parent kills us |
| 452 | * with a USR2 signal. We sleep for a short time as on |
| 453 | * some OSes a signal won't interrupt a sleep! */ |
| 454 | while (1) |
| 455 | msleep(20); |
| 456 | } |
| 457 | |
| 458 | am_generator = 1; |
| 459 | |
| 460 | close(error_pipe[1]); |
| 461 | if (f_in != f_out) close(f_in); |
| 462 | |
| 463 | io_start_buffering_out(f_out); |
| 464 | |
| 465 | set_msg_fd_in(error_pipe[0]); |
| 466 | |
| 467 | generate_files(f_out, flist, local_name); |
| 468 | |
| 469 | get_redo_num(); /* Read final MSG_DONE and any prior messages. */ |
| 470 | io_flush(FULL_FLUSH); |
| 471 | if (protocol_version >= 24) { |
| 472 | /* send a final goodbye message */ |
| 473 | write_int(f_out, -1); |
| 474 | } |
| 475 | io_flush(FULL_FLUSH); |
| 476 | |
| 477 | set_msg_fd_in(-1); |
| 478 | kill(pid, SIGUSR2); |
| 479 | wait_process(pid, &status); |
| 480 | return status; |
| 481 | } |
| 482 | |
| 483 | |
| 484 | static void do_server_recv(int f_in, int f_out, int argc,char *argv[]) |
| 485 | { |
| 486 | int status; |
| 487 | struct file_list *flist; |
| 488 | char *local_name=NULL; |
| 489 | char *dir = NULL; |
| 490 | |
| 491 | if (verbose > 2) { |
| 492 | rprintf(FINFO, "server_recv(%d) starting pid=%ld\n", |
| 493 | argc, (long)getpid()); |
| 494 | } |
| 495 | |
| 496 | if (am_daemon && lp_read_only(module_id) && !am_sender) { |
| 497 | rprintf(FERROR,"ERROR: module is read only\n"); |
| 498 | exit_cleanup(RERR_SYNTAX); |
| 499 | return; |
| 500 | } |
| 501 | |
| 502 | |
| 503 | if (argc > 0) { |
| 504 | dir = argv[0]; |
| 505 | argc--; |
| 506 | argv++; |
| 507 | if (!am_daemon && !push_dir(dir)) { |
| 508 | rprintf(FERROR, "push_dir %s failed: %s (4)\n", |
| 509 | full_fname(dir), strerror(errno)); |
| 510 | exit_cleanup(RERR_FILESELECT); |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | io_start_buffering_in(f_in); |
| 515 | if (delete_mode && !delete_excluded) |
| 516 | recv_exclude_list(f_in); |
| 517 | |
| 518 | if (filesfrom_fd >= 0) { |
| 519 | /* We're receiving the file info from the sender, so we need |
| 520 | * the IO routines to automatically write out the names onto |
| 521 | * our f_out socket as we read the list info from the sender. |
| 522 | * This avoids both deadlock and extra delays/buffers. */ |
| 523 | io_set_filesfrom_fds(filesfrom_fd, f_out); |
| 524 | filesfrom_fd = -1; |
| 525 | } |
| 526 | |
| 527 | if (read_batch) |
| 528 | flist = batch_flist; |
| 529 | else |
| 530 | flist = recv_file_list(f_in); |
| 531 | if (!flist) { |
| 532 | rprintf(FERROR,"server_recv: recv_file_list error\n"); |
| 533 | exit_cleanup(RERR_FILESELECT); |
| 534 | } |
| 535 | |
| 536 | if (argc > 0) { |
| 537 | if (strcmp(dir,".")) { |
| 538 | argv[0] += strlen(dir); |
| 539 | if (argv[0][0] == '/') argv[0]++; |
| 540 | } |
| 541 | local_name = get_local_name(flist,argv[0]); |
| 542 | } |
| 543 | |
| 544 | status = do_recv(f_in,f_out,flist,local_name); |
| 545 | exit_cleanup(status); |
| 546 | } |
| 547 | |
| 548 | |
| 549 | int child_main(int argc, char *argv[]) |
| 550 | { |
| 551 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
| 552 | return 0; |
| 553 | } |
| 554 | |
| 555 | |
| 556 | void start_server(int f_in, int f_out, int argc, char *argv[]) |
| 557 | { |
| 558 | setup_protocol(f_out, f_in); |
| 559 | |
| 560 | set_nonblocking(f_in); |
| 561 | set_nonblocking(f_out); |
| 562 | |
| 563 | if (protocol_version >= 23) |
| 564 | io_start_multiplex_out(f_out); |
| 565 | |
| 566 | if (am_sender) { |
| 567 | if (!read_batch) { |
| 568 | recv_exclude_list(f_in); |
| 569 | if (cvs_exclude) |
| 570 | add_cvs_excludes(); |
| 571 | } |
| 572 | do_server_sender(f_in, f_out, argc, argv); |
| 573 | } else { |
| 574 | do_server_recv(f_in, f_out, argc, argv); |
| 575 | } |
| 576 | exit_cleanup(0); |
| 577 | } |
| 578 | |
| 579 | |
| 580 | /* |
| 581 | * This is called once the connection has been negotiated. It is used |
| 582 | * for rsyncd, remote-shell, and local connections. |
| 583 | */ |
| 584 | int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[]) |
| 585 | { |
| 586 | struct file_list *flist = NULL; |
| 587 | int status = 0, status2 = 0; |
| 588 | char *local_name = NULL; |
| 589 | |
| 590 | cleanup_child_pid = pid; |
| 591 | if (read_batch) |
| 592 | flist = batch_flist; |
| 593 | |
| 594 | set_nonblocking(f_in); |
| 595 | set_nonblocking(f_out); |
| 596 | |
| 597 | setup_protocol(f_out,f_in); |
| 598 | |
| 599 | if (protocol_version >= 23) |
| 600 | io_start_multiplex_in(f_in); |
| 601 | |
| 602 | if (am_sender) { |
| 603 | io_start_buffering_out(f_out); |
| 604 | if (cvs_exclude) |
| 605 | add_cvs_excludes(); |
| 606 | if (delete_mode && !delete_excluded) |
| 607 | send_exclude_list(f_out); |
| 608 | if (remote_filesfrom_file) |
| 609 | filesfrom_fd = f_in; |
| 610 | if (!read_batch) /* don't write to pipe */ |
| 611 | flist = send_file_list(f_out,argc,argv); |
| 612 | if (verbose > 3) |
| 613 | rprintf(FINFO,"file list sent\n"); |
| 614 | |
| 615 | io_flush(NORMAL_FLUSH); |
| 616 | send_files(flist,f_out,f_in); |
| 617 | io_flush(FULL_FLUSH); |
| 618 | if (protocol_version >= 24) { |
| 619 | /* final goodbye message */ |
| 620 | read_int(f_in); |
| 621 | } |
| 622 | if (pid != -1) { |
| 623 | if (verbose > 3) |
| 624 | rprintf(FINFO,"client_run waiting on %d\n", (int) pid); |
| 625 | io_flush(FULL_FLUSH); |
| 626 | wait_process(pid, &status); |
| 627 | } |
| 628 | report(-1); |
| 629 | io_flush(FULL_FLUSH); |
| 630 | exit_cleanup(status); |
| 631 | } |
| 632 | |
| 633 | if (argc == 0) { |
| 634 | list_only = 1; |
| 635 | } |
| 636 | |
| 637 | if (!write_batch) |
| 638 | send_exclude_list(f_out); |
| 639 | |
| 640 | if (filesfrom_fd >= 0) { |
| 641 | io_set_filesfrom_fds(filesfrom_fd, f_out); |
| 642 | filesfrom_fd = -1; |
| 643 | } |
| 644 | |
| 645 | flist = recv_file_list(f_in); |
| 646 | if (!flist || flist->count == 0) { |
| 647 | rprintf(FINFO, "client: nothing to do: " |
| 648 | "perhaps you need to specify some filenames or " |
| 649 | "the --recursive option?\n"); |
| 650 | exit_cleanup(0); |
| 651 | } |
| 652 | |
| 653 | local_name = get_local_name(flist,argv[0]); |
| 654 | |
| 655 | status2 = do_recv(f_in,f_out,flist,local_name); |
| 656 | |
| 657 | if (pid != -1) { |
| 658 | if (verbose > 3) |
| 659 | rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid); |
| 660 | io_flush(FULL_FLUSH); |
| 661 | wait_process(pid, &status); |
| 662 | } |
| 663 | |
| 664 | return MAX(status, status2); |
| 665 | } |
| 666 | |
| 667 | static int copy_argv (char *argv[]) |
| 668 | { |
| 669 | int i; |
| 670 | |
| 671 | for (i = 0; argv[i]; i++) { |
| 672 | if (!(argv[i] = strdup(argv[i]))) { |
| 673 | rprintf (FERROR, "out of memory at %s(%d)\n", |
| 674 | __FILE__, __LINE__); |
| 675 | return RERR_MALLOC; |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | return 0; |
| 680 | } |
| 681 | |
| 682 | |
| 683 | /** |
| 684 | * Start a client for either type of remote connection. Work out |
| 685 | * whether the arguments request a remote shell or rsyncd connection, |
| 686 | * and call the appropriate connection function, then run_client. |
| 687 | * |
| 688 | * Calls either start_socket_client (for sockets) or do_cmd and |
| 689 | * client_run (for ssh). |
| 690 | **/ |
| 691 | static int start_client(int argc, char *argv[]) |
| 692 | { |
| 693 | char *p; |
| 694 | char *shell_machine = NULL; |
| 695 | char *shell_path = NULL; |
| 696 | char *shell_user = NULL; |
| 697 | int ret; |
| 698 | pid_t pid; |
| 699 | int f_in,f_out; |
| 700 | int rc; |
| 701 | |
| 702 | /* Don't clobber argv[] so that ps(1) can still show the right |
| 703 | * command line. */ |
| 704 | if ((rc = copy_argv(argv))) |
| 705 | return rc; |
| 706 | |
| 707 | /* rsync:// always uses rsync server over direct socket connection */ |
| 708 | if (strncasecmp(URL_PREFIX, argv[0], strlen(URL_PREFIX)) == 0) { |
| 709 | char *host, *path; |
| 710 | |
| 711 | host = argv[0] + strlen(URL_PREFIX); |
| 712 | p = strchr(host,'/'); |
| 713 | if (p) { |
| 714 | *p = 0; |
| 715 | path = p+1; |
| 716 | } else { |
| 717 | path = ""; |
| 718 | } |
| 719 | p = strchr(host,':'); |
| 720 | if (p) { |
| 721 | rsync_port = atoi(p+1); |
| 722 | *p = 0; |
| 723 | } |
| 724 | return start_socket_client(host, path, argc-1, argv+1); |
| 725 | } |
| 726 | |
| 727 | if (!read_batch) { |
| 728 | p = find_colon(argv[0]); |
| 729 | if (p) { |
| 730 | if (remote_filesfrom_file |
| 731 | && remote_filesfrom_file != files_from + 1 |
| 732 | && strncmp(files_from, argv[0], p-argv[0]+1) != 0) { |
| 733 | rprintf(FERROR, |
| 734 | "--files-from hostname is not transfer hostname\n"); |
| 735 | exit_cleanup(RERR_SYNTAX); |
| 736 | } |
| 737 | if (p[1] == ':') { /* double colon */ |
| 738 | *p = 0; |
| 739 | if (!shell_cmd) { |
| 740 | return start_socket_client(argv[0], p+2, |
| 741 | argc-1, argv+1); |
| 742 | } |
| 743 | p++; |
| 744 | daemon_over_rsh = 1; |
| 745 | } |
| 746 | |
| 747 | if (argc < 1) { |
| 748 | usage(FERROR); |
| 749 | exit_cleanup(RERR_SYNTAX); |
| 750 | } |
| 751 | |
| 752 | am_sender = 0; |
| 753 | *p = 0; |
| 754 | shell_machine = argv[0]; |
| 755 | shell_path = p+1; |
| 756 | argc--; |
| 757 | argv++; |
| 758 | } else { |
| 759 | am_sender = 1; |
| 760 | |
| 761 | /* rsync:// destination uses rsync server over direct socket */ |
| 762 | if (strncasecmp(URL_PREFIX, argv[argc-1], strlen(URL_PREFIX)) == 0) { |
| 763 | char *host, *path; |
| 764 | |
| 765 | host = argv[argc-1] + strlen(URL_PREFIX); |
| 766 | p = strchr(host,'/'); |
| 767 | if (p) { |
| 768 | *p = 0; |
| 769 | path = p+1; |
| 770 | } else { |
| 771 | path = ""; |
| 772 | } |
| 773 | p = strchr(host,':'); |
| 774 | if (p) { |
| 775 | rsync_port = atoi(p+1); |
| 776 | *p = 0; |
| 777 | } |
| 778 | return start_socket_client(host, path, argc-1, argv); |
| 779 | } |
| 780 | |
| 781 | p = find_colon(argv[argc-1]); |
| 782 | if (p && remote_filesfrom_file |
| 783 | && remote_filesfrom_file != files_from + 1 |
| 784 | && strncmp(files_from, argv[argc-1], p-argv[argc-1]+1) != 0) { |
| 785 | rprintf(FERROR, |
| 786 | "--files-from hostname is not transfer hostname\n"); |
| 787 | exit_cleanup(RERR_SYNTAX); |
| 788 | } |
| 789 | if (!p) { |
| 790 | local_server = 1; |
| 791 | if (remote_filesfrom_file) { |
| 792 | rprintf(FERROR, |
| 793 | "--files-from is remote but transfer is local\n"); |
| 794 | exit_cleanup(RERR_SYNTAX); |
| 795 | } |
| 796 | } else if (p[1] == ':') { /* double colon */ |
| 797 | *p = 0; |
| 798 | if (!shell_cmd) { |
| 799 | return start_socket_client(argv[argc-1], p+2, |
| 800 | argc-1, argv); |
| 801 | } |
| 802 | p++; |
| 803 | daemon_over_rsh = 1; |
| 804 | } |
| 805 | |
| 806 | if (argc < 2) { |
| 807 | usage(FERROR); |
| 808 | exit_cleanup(RERR_SYNTAX); |
| 809 | } |
| 810 | |
| 811 | if (local_server) { |
| 812 | shell_machine = NULL; |
| 813 | shell_path = argv[argc-1]; |
| 814 | } else { |
| 815 | *p = 0; |
| 816 | shell_machine = argv[argc-1]; |
| 817 | shell_path = p+1; |
| 818 | } |
| 819 | argc--; |
| 820 | } |
| 821 | } else { |
| 822 | am_sender = 1; |
| 823 | local_server = 1; |
| 824 | shell_path = argv[argc-1]; |
| 825 | } |
| 826 | |
| 827 | if (shell_machine) { |
| 828 | p = strrchr(shell_machine,'@'); |
| 829 | if (p) { |
| 830 | *p = 0; |
| 831 | shell_user = shell_machine; |
| 832 | shell_machine = p+1; |
| 833 | } |
| 834 | } |
| 835 | |
| 836 | if (verbose > 3) { |
| 837 | rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n", |
| 838 | shell_cmd?shell_cmd:"", |
| 839 | shell_machine?shell_machine:"", |
| 840 | shell_user?shell_user:"", |
| 841 | shell_path?shell_path:""); |
| 842 | } |
| 843 | |
| 844 | if (!am_sender && argc > 1) { |
| 845 | usage(FERROR); |
| 846 | exit_cleanup(RERR_SYNTAX); |
| 847 | } |
| 848 | |
| 849 | if (argc == 0 && !am_sender) { |
| 850 | list_only = 1; |
| 851 | } |
| 852 | |
| 853 | pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path, |
| 854 | &f_in,&f_out); |
| 855 | |
| 856 | /* if we're running an rsync server on the remote host over a |
| 857 | * remote shell command, we need to do the RSYNCD protocol first */ |
| 858 | if (daemon_over_rsh) { |
| 859 | int tmpret; |
| 860 | tmpret = start_inband_exchange(shell_user, shell_path, |
| 861 | f_in, f_out, argc); |
| 862 | if (tmpret < 0) |
| 863 | return tmpret; |
| 864 | } |
| 865 | |
| 866 | ret = client_run(f_in, f_out, pid, argc, argv); |
| 867 | |
| 868 | fflush(stdout); |
| 869 | fflush(stderr); |
| 870 | |
| 871 | return ret; |
| 872 | } |
| 873 | |
| 874 | |
| 875 | static RETSIGTYPE sigusr1_handler(UNUSED(int val)) |
| 876 | { |
| 877 | exit_cleanup(RERR_SIGNAL); |
| 878 | } |
| 879 | |
| 880 | static RETSIGTYPE sigusr2_handler(UNUSED(int val)) |
| 881 | { |
| 882 | if (log_got_error) _exit(RERR_PARTIAL); |
| 883 | _exit(0); |
| 884 | } |
| 885 | |
| 886 | static RETSIGTYPE sigchld_handler(UNUSED(int val)) |
| 887 | { |
| 888 | #ifdef WNOHANG |
| 889 | int cnt, status; |
| 890 | pid_t pid; |
| 891 | /* An empty waitpid() loop was put here by Tridge and we could never |
| 892 | * get him to explain why he put it in, so rather than taking it |
| 893 | * out we're instead saving the child exit statuses for later use. |
| 894 | * The waitpid() loop presumably eliminates all possibility of leaving |
| 895 | * zombie children, maybe that's why he did it. |
| 896 | */ |
| 897 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) { |
| 898 | /* save the child's exit status */ |
| 899 | for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) { |
| 900 | if (pid_stat_table[cnt].pid == 0) { |
| 901 | pid_stat_table[cnt].pid = pid; |
| 902 | pid_stat_table[cnt].status = status; |
| 903 | break; |
| 904 | } |
| 905 | } |
| 906 | } |
| 907 | #endif |
| 908 | } |
| 909 | |
| 910 | |
| 911 | /** |
| 912 | * This routine catches signals and tries to send them to gdb. |
| 913 | * |
| 914 | * Because it's called from inside a signal handler it ought not to |
| 915 | * use too many library routines. |
| 916 | * |
| 917 | * @todo Perhaps use "screen -X" instead/as well, to help people |
| 918 | * debugging without easy access to X. Perhaps use an environment |
| 919 | * variable, or just call a script? |
| 920 | * |
| 921 | * @todo The /proc/ magic probably only works on Linux (and |
| 922 | * Solaris?) Can we be more portable? |
| 923 | **/ |
| 924 | #ifdef MAINTAINER_MODE |
| 925 | const char *get_panic_action(void) |
| 926 | { |
| 927 | const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION"); |
| 928 | |
| 929 | if (cmd_fmt) |
| 930 | return cmd_fmt; |
| 931 | else |
| 932 | return "xterm -display :0 -T Panic -n Panic " |
| 933 | "-e gdb /proc/%d/exe %d"; |
| 934 | } |
| 935 | |
| 936 | |
| 937 | /** |
| 938 | * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION. |
| 939 | * |
| 940 | * This signal handler is only installed if we were configured with |
| 941 | * --enable-maintainer-mode. Perhaps it should always be on and we |
| 942 | * should just look at the environment variable, but I'm a bit leery |
| 943 | * of a signal sending us into a busy loop. |
| 944 | **/ |
| 945 | static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig)) |
| 946 | { |
| 947 | char cmd_buf[300]; |
| 948 | int ret; |
| 949 | |
| 950 | sprintf(cmd_buf, get_panic_action(), |
| 951 | getpid(), getpid()); |
| 952 | |
| 953 | /* Unless we failed to execute gdb, we allow the process to |
| 954 | * continue. I'm not sure if that's right. */ |
| 955 | ret = system(cmd_buf); |
| 956 | if (ret) |
| 957 | _exit(ret); |
| 958 | } |
| 959 | #endif |
| 960 | |
| 961 | |
| 962 | int main(int argc,char *argv[]) |
| 963 | { |
| 964 | int ret; |
| 965 | int orig_argc; |
| 966 | char **orig_argv; |
| 967 | |
| 968 | orig_argc = argc; |
| 969 | orig_argv = argv; |
| 970 | |
| 971 | signal(SIGUSR1, sigusr1_handler); |
| 972 | signal(SIGUSR2, sigusr2_handler); |
| 973 | signal(SIGCHLD, sigchld_handler); |
| 974 | #ifdef MAINTAINER_MODE |
| 975 | signal(SIGSEGV, rsync_panic_handler); |
| 976 | signal(SIGFPE, rsync_panic_handler); |
| 977 | signal(SIGABRT, rsync_panic_handler); |
| 978 | signal(SIGBUS, rsync_panic_handler); |
| 979 | #endif /* def MAINTAINER_MODE */ |
| 980 | |
| 981 | starttime = time(NULL); |
| 982 | am_root = (getuid() == 0); |
| 983 | |
| 984 | memset(&stats, 0, sizeof(stats)); |
| 985 | |
| 986 | if (argc < 2) { |
| 987 | usage(FERROR); |
| 988 | exit_cleanup(RERR_SYNTAX); |
| 989 | } |
| 990 | |
| 991 | /* we set a 0 umask so that correct file permissions can be |
| 992 | * carried across */ |
| 993 | orig_umask = (int)umask(0); |
| 994 | |
| 995 | if (!parse_arguments(&argc, (const char ***) &argv, 1)) { |
| 996 | /* FIXME: We ought to call the same error-handling |
| 997 | * code here, rather than relying on getopt. */ |
| 998 | option_error(); |
| 999 | exit_cleanup(RERR_SYNTAX); |
| 1000 | } |
| 1001 | |
| 1002 | signal(SIGINT,SIGNAL_CAST sig_int); |
| 1003 | signal(SIGHUP,SIGNAL_CAST sig_int); |
| 1004 | signal(SIGTERM,SIGNAL_CAST sig_int); |
| 1005 | |
| 1006 | /* Ignore SIGPIPE; we consistently check error codes and will |
| 1007 | * see the EPIPE. */ |
| 1008 | signal(SIGPIPE, SIG_IGN); |
| 1009 | |
| 1010 | /* Initialize push_dir here because on some old systems getcwd |
| 1011 | * (implemented by forking "pwd" and reading its output) doesn't |
| 1012 | * work when there are other child processes. Also, on all systems |
| 1013 | * that implement getcwd that way "pwd" can't be found after chroot. */ |
| 1014 | push_dir(NULL); |
| 1015 | |
| 1016 | init_flist(); |
| 1017 | |
| 1018 | if (write_batch && !am_server) { |
| 1019 | write_batch_argvs_file(orig_argc, orig_argv); |
| 1020 | } |
| 1021 | |
| 1022 | if (am_daemon && !am_server) |
| 1023 | return daemon_main(); |
| 1024 | |
| 1025 | if (argc < 1) { |
| 1026 | usage(FERROR); |
| 1027 | exit_cleanup(RERR_SYNTAX); |
| 1028 | } |
| 1029 | |
| 1030 | if (dry_run) |
| 1031 | verbose = MAX(verbose,1); |
| 1032 | |
| 1033 | if (am_server) { |
| 1034 | set_nonblocking(STDIN_FILENO); |
| 1035 | set_nonblocking(STDOUT_FILENO); |
| 1036 | if (am_daemon) |
| 1037 | return start_daemon(STDIN_FILENO, STDOUT_FILENO); |
| 1038 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
| 1039 | } |
| 1040 | |
| 1041 | ret = start_client(argc, argv); |
| 1042 | if (ret == -1) |
| 1043 | exit_cleanup(RERR_STARTCLIENT); |
| 1044 | else |
| 1045 | exit_cleanup(ret); |
| 1046 | |
| 1047 | return ret; |
| 1048 | } |