main.c

   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, 2007 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 inc_recurse;
  38 extern int blocking_io;
  39 extern int remove_source_files;
  40 extern int daemon_over_rsh;
  41 extern int need_messages_from_generator;
  42 extern int kluge_around_eof;
  43 extern int do_stats;
  44 extern int log_got_error;
  45 extern int module_id;
  46 extern int copy_links;
  47 extern int copy_dirlinks;
  48 extern int keep_dirlinks;
  49 extern int preserve_hard_links;
  50 extern int protocol_version;
  51 extern int file_total;
  52 extern int recurse;
  53 extern int relative_paths;
  54 extern int sanitize_paths;
  55 extern int curr_dir_depth;
  56 extern int curr_dir_len;
  57 extern int module_id;
  58 extern int rsync_port;
  59 extern int whole_file;
  60 extern int read_batch;
  61 extern int write_batch;
  62 extern int batch_fd;
  63 extern int filesfrom_fd;
  64 extern pid_t cleanup_child_pid;
  65 extern struct stats stats;
  66 extern char *filesfrom_host;
  67 extern char *partial_dir;
  68 extern char *basis_dir[];
  69 extern char *rsync_path;
  70 extern char *shell_cmd;
  71 extern char *batch_name;
  72 extern char *password_file;
  73 extern char curr_dir[MAXPATHLEN];
  74 extern struct filter_list_struct server_filter_list;
  75
  76 int local_server = 0;
  77 int new_root_dir = 0;
  78 mode_t orig_umask = 0;
  79 int batch_gen_fd = -1;
  80
  81 /* There's probably never more than at most 2 outstanding child processes,
  82  * but set it higher, just in case. */
  83 #define MAXCHILDPROCS 7
  84
  85 #ifdef HAVE_SIGACTION
  86 # ifdef HAVE_SIGPROCMASK
  87 #  define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
  88 # else
  89 #  define SIGACTMASK(n,h) SIGACTION(n,h)
  90 # endif
  91 static struct sigaction sigact;
  92 #endif
  93
  94 struct pid_status {
  95         pid_t pid;
  96         int status;
  97 } pid_stat_table[MAXCHILDPROCS];
  98
  99 static time_t starttime, endtime;
 100 static int64 total_read, total_written;
 101
 102 static void show_malloc_stats(void);
 103
 104 /* Works like waitpid(), but if we already harvested the child pid in our
 105  * remember_children(), we succeed instead of returning an error. */
 106 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
 107 {
 108         pid_t waited_pid;
 109
 110         do {
 111                 waited_pid = waitpid(pid, status_ptr, flags);
 112         } while (waited_pid == -1 && errno == EINTR);
 113
 114         if (waited_pid == -1 && errno == ECHILD) {
 115                 /* Status of requested child no longer available:  check to
 116                  * see if it was processed by remember_children(). */
 117                 int cnt;
 118                 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
 119                         if (pid == pid_stat_table[cnt].pid) {
 120                                 *status_ptr = pid_stat_table[cnt].status;
 121                                 pid_stat_table[cnt].pid = 0;
 122                                 return pid;
 123                         }
 124                 }
 125         }
 126
 127         return waited_pid;
 128 }
 129
 130 /* Wait for a process to exit, calling io_flush while waiting. */
 131 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
 132 {
 133         pid_t waited_pid;
 134         int status;
 135
 136         while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
 137                 msleep(20);
 138                 io_flush(FULL_FLUSH);
 139         }
 140
 141         /* TODO: If the child exited on a signal, then log an
 142          * appropriate error message.  Perhaps we should also accept a
 143          * message describing the purpose of the child.  Also indicate
 144          * this to the caller so that they know something went wrong. */
 145         if (waited_pid < 0) {
 146                 rsyserr(FERROR, errno, "waitpid");
 147                 *exit_code_ptr = RERR_WAITCHILD;
 148         } else if (!WIFEXITED(status)) {
 149 #ifdef WCOREDUMP
 150                 if (WCOREDUMP(status))
 151                         *exit_code_ptr = RERR_CRASHED;
 152                 else
 153 #endif
 154                 if (WIFSIGNALED(status))
 155                         *exit_code_ptr = RERR_TERMINATED;
 156                 else
 157                         *exit_code_ptr = RERR_WAITCHILD;
 158         } else
 159                 *exit_code_ptr = WEXITSTATUS(status);
 160 }
 161
 162 /* This function gets called from all 3 processes.  We want the client side
 163  * to actually output the text, but the sender is the only process that has
 164  * all the stats we need.  So, if we're a client sender, we do the report.
 165  * If we're a server sender, we write the stats on the supplied fd.  If
 166  * we're the client receiver we read the stats from the supplied fd and do
 167  * the report.  All processes might also generate a set of debug stats, if
 168  * the verbose level is high enough (this is the only thing that the
 169  * generator process and the server receiver ever do here). */
 170 static void handle_stats(int f)
 171 {
 172         endtime = time(NULL);
 173
 174         /* Cache two stats because the read/write code can change it. */
 175         total_read = stats.total_read;
 176         total_written = stats.total_written;
 177
 178         if (do_stats && verbose > 1) {
 179                 /* These come out from every process */
 180                 show_malloc_stats();
 181                 show_flist_stats();
 182         }
 183
 184         if (am_generator)
 185                 return;
 186
 187         if (am_daemon) {
 188                 if (f == -1 || !am_sender)
 189                         return;
 190         }
 191
 192         if (am_server) {
 193                 if (am_sender) {
 194                         write_longint(f, total_read);
 195                         write_longint(f, total_written);
 196                         write_longint(f, stats.total_size);
 197                         if (protocol_version >= 29) {
 198                                 write_longint(f, stats.flist_buildtime);
 199                                 write_longint(f, stats.flist_xfertime);
 200                         }
 201                 }
 202                 return;
 203         }
 204
 205         /* this is the client */
 206
 207         if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
 208                 ;
 209         else if (!am_sender) {
 210                 /* Read the first two in opposite order because the meaning of
 211                  * read/write swaps when switching from sender to receiver. */
 212                 total_written = read_longint(f);
 213                 total_read = read_longint(f);
 214                 stats.total_size = read_longint(f);
 215                 if (protocol_version >= 29) {
 216                         stats.flist_buildtime = read_longint(f);
 217                         stats.flist_xfertime = read_longint(f);
 218                 }
 219         } else if (write_batch) {
 220                 /* The --read-batch process is going to be a client
 221                  * receiver, so we need to give it the stats. */
 222                 write_longint(batch_fd, total_read);
 223                 write_longint(batch_fd, total_written);
 224                 write_longint(batch_fd, stats.total_size);
 225                 if (protocol_version >= 29) {
 226                         write_longint(batch_fd, stats.flist_buildtime);
 227                         write_longint(batch_fd, stats.flist_xfertime);
 228                 }
 229         }
 230 }
 231
 232 static void output_summary(void)
 233 {
 234         if (do_stats) {
 235                 rprintf(FCLIENT, "\n");
 236                 rprintf(FINFO,"Number of files: %d\n", stats.num_files);
 237                 rprintf(FINFO,"Number of files transferred: %d\n",
 238                         stats.num_transferred_files);
 239                 rprintf(FINFO,"Total file size: %s bytes\n",
 240                         human_num(stats.total_size));
 241                 rprintf(FINFO,"Total transferred file size: %s bytes\n",
 242                         human_num(stats.total_transferred_size));
 243                 rprintf(FINFO,"Literal data: %s bytes\n",
 244                         human_num(stats.literal_data));
 245                 rprintf(FINFO,"Matched data: %s bytes\n",
 246                         human_num(stats.matched_data));
 247                 rprintf(FINFO,"File list size: %s\n",
 248                         human_num(stats.flist_size));
 249                 if (stats.flist_buildtime) {
 250                         rprintf(FINFO,
 251                                 "File list generation time: %.3f seconds\n",
 252                                 (double)stats.flist_buildtime / 1000);
 253                         rprintf(FINFO,
 254                                 "File list transfer time: %.3f seconds\n",
 255                                 (double)stats.flist_xfertime / 1000);
 256                 }
 257                 rprintf(FINFO,"Total bytes sent: %s\n",
 258                         human_num(total_written));
 259                 rprintf(FINFO,"Total bytes received: %s\n",
 260                         human_num(total_read));
 261         }
 262
 263         if (verbose || do_stats) {
 264                 rprintf(FCLIENT, "\n");
 265                 rprintf(FINFO,
 266                         "sent %s bytes  received %s bytes  %s bytes/sec\n",
 267                         human_num(total_written), human_num(total_read),
 268                         human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2));
 269                 rprintf(FINFO, "total size is %s  speedup is %.2f\n",
 270                         human_num(stats.total_size),
 271                         (double)stats.total_size / (total_written+total_read));
 272         }
 273
 274         fflush(stdout);
 275         fflush(stderr);
 276 }
 277
 278
 279 /**
 280  * If our C library can get malloc statistics, then show them to FINFO
 281  **/
 282 static void show_malloc_stats(void)
 283 {
 284 #ifdef HAVE_MALLINFO
 285         struct mallinfo mi;
 286
 287         mi = mallinfo();
 288
 289         rprintf(FCLIENT, "\n");
 290         rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
 291                 getpid(), am_server ? "server " : "",
 292                 am_daemon ? "daemon " : "", who_am_i());
 293         rprintf(FINFO, "  arena:     %10ld   (bytes from sbrk)\n",
 294                 (long)mi.arena);
 295         rprintf(FINFO, "  ordblks:   %10ld   (chunks not in use)\n",
 296                 (long)mi.ordblks);
 297         rprintf(FINFO, "  smblks:    %10ld\n",
 298                 (long)mi.smblks);
 299         rprintf(FINFO, "  hblks:     %10ld   (chunks from mmap)\n",
 300                 (long)mi.hblks);
 301         rprintf(FINFO, "  hblkhd:    %10ld   (bytes from mmap)\n",
 302                 (long)mi.hblkhd);
 303         rprintf(FINFO, "  allmem:    %10ld   (bytes from sbrk + mmap)\n",
 304                 (long)mi.arena + mi.hblkhd);
 305         rprintf(FINFO, "  usmblks:   %10ld\n",
 306                 (long)mi.usmblks);
 307         rprintf(FINFO, "  fsmblks:   %10ld\n",
 308                 (long)mi.fsmblks);
 309         rprintf(FINFO, "  uordblks:  %10ld   (bytes used)\n",
 310                 (long)mi.uordblks);
 311         rprintf(FINFO, "  fordblks:  %10ld   (bytes free)\n",
 312                 (long)mi.fordblks);
 313         rprintf(FINFO, "  keepcost:  %10ld   (bytes in releasable chunk)\n",
 314                 (long)mi.keepcost);
 315 #endif /* HAVE_MALLINFO */
 316 }
 317
 318
 319 /* Start the remote shell.   cmd may be NULL to use the default. */
 320 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
 321                     int *f_in, int *f_out)
 322 {
 323         int i, argc = 0;
 324         char *args[MAX_ARGS];
 325         pid_t ret;
 326         char *dir = NULL;
 327         int dash_l_set = 0;
 328
 329         if (!read_batch && !local_server) {
 330                 char *t, *f, in_quote = '\0';
 331                 char *rsh_env = getenv(RSYNC_RSH_ENV);
 332                 if (!cmd)
 333                         cmd = rsh_env;
 334                 if (!cmd)
 335                         cmd = RSYNC_RSH;
 336                 cmd = strdup(cmd);
 337                 if (!cmd)
 338                         goto oom;
 339
 340                 for (t = f = cmd; *f; f++) {
 341                         if (*f == ' ')
 342                                 continue;
 343                         /* Comparison leaves rooms for server_options(). */
 344                         if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
 345                                 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
 346                                 exit_cleanup(RERR_SYNTAX);
 347                         }
 348                         args[argc++] = t;
 349                         while (*f != ' ' || in_quote) {
 350                                 if (!*f) {
 351                                         if (in_quote) {
 352                                                 rprintf(FERROR,
 353                                                     "Missing trailing-%c in remote-shell command.\n",
 354                                                     in_quote);
 355                                                 exit_cleanup(RERR_SYNTAX);
 356                                         }
 357                                         f--;
 358                                         break;
 359                                 }
 360                                 if (*f == '\'' || *f == '"') {
 361                                         if (!in_quote) {
 362                                                 in_quote = *f++;
 363                                                 continue;
 364                                         }
 365                                         if (*f == in_quote && *++f != in_quote) {
 366                                                 in_quote = '\0';
 367                                                 continue;
 368                                         }
 369                                 }
 370                                 *t++ = *f++;
 371                         }
 372                         *t++ = '\0';
 373                 }
 374
 375                 /* check to see if we've already been given '-l user' in
 376                  * the remote-shell command */
 377                 for (i = 0; i < argc-1; i++) {
 378                         if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
 379                                 dash_l_set = 1;
 380                 }
 381
 382 #ifdef HAVE_REMSH
 383                 /* remsh (on HPUX) takes the arguments the other way around */
 384                 args[argc++] = machine;
 385                 if (user && !(daemon_over_rsh && dash_l_set)) {
 386                         args[argc++] = "-l";
 387                         args[argc++] = user;
 388                 }
 389 #else
 390                 if (user && !(daemon_over_rsh && dash_l_set)) {
 391                         args[argc++] = "-l";
 392                         args[argc++] = user;
 393                 }
 394                 args[argc++] = machine;
 395 #endif
 396
 397                 args[argc++] = rsync_path;
 398
 399                 if (blocking_io < 0) {
 400                         char *cp;
 401                         if ((cp = strrchr(cmd, '/')) != NULL)
 402                                 cp++;
 403                         else
 404                                 cp = cmd;
 405                         if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
 406                                 blocking_io = 1;
 407                 }
 408
 409                 server_options(args,&argc);
 410
 411                 if (argc >= MAX_ARGS - 2) {
 412                         rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
 413                         exit_cleanup(RERR_SYNTAX);
 414                 }
 415         }
 416
 417         args[argc++] = ".";
 418
 419         if (!daemon_over_rsh && path && *path)
 420                 args[argc++] = path;
 421
 422         args[argc] = NULL;
 423
 424         if (verbose > 3) {
 425                 for (i = 0; i < argc; i++)
 426                         rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]);
 427                 rprintf(FCLIENT, "\n");
 428         }
 429
 430         if (read_batch) {
 431                 int from_gen_pipe[2];
 432                 if (fd_pair(from_gen_pipe) < 0) {
 433                         rsyserr(FERROR, errno, "pipe");
 434                         exit_cleanup(RERR_IPC);
 435                 }
 436                 batch_gen_fd = from_gen_pipe[0];
 437                 *f_out = from_gen_pipe[1];
 438                 *f_in = batch_fd;
 439                 ret = -1; /* no child pid */
 440         } else if (local_server) {
 441                 /* If the user didn't request --[no-]whole-file, force
 442                  * it on, but only if we're not batch processing. */
 443                 if (whole_file < 0 && !write_batch)
 444                         whole_file = 1;
 445                 ret = local_child(argc, args, f_in, f_out, child_main);
 446         } else
 447                 ret = piped_child(args,f_in,f_out);
 448
 449         if (dir)
 450                 free(dir);
 451
 452         return ret;
 453
 454   oom:
 455         out_of_memory("do_cmd");
 456         return 0; /* not reached */
 457 }
 458
 459 /* The receiving side operates in one of two modes:
 460  *
 461  * 1. it receives any number of files into a destination directory,
 462  * placing them according to their names in the file-list.
 463  *
 464  * 2. it receives a single file and saves it using the name in the
 465  * destination path instead of its file-list name.  This requires a
 466  * "local name" for writing out the destination file.
 467  *
 468  * So, our task is to figure out what mode/local-name we need.
 469  * For mode 1, we change into the destination directory and return NULL.
 470  * For mode 2, we change into the directory containing the destination
 471  * file (if we aren't already there) and return the local-name. */
 472 static char *get_local_name(struct file_list *flist, char *dest_path)
 473 {
 474         STRUCT_STAT st;
 475         int statret;
 476         char *cp;
 477
 478         if (verbose > 2) {
 479                 rprintf(FINFO, "get_local_name count=%d %s\n",
 480                         file_total, NS(dest_path));
 481         }
 482
 483         if (!dest_path || list_only)
 484                 return NULL;
 485
 486         /* See what currently exists at the destination. */
 487         if ((statret = do_stat(dest_path, &st)) == 0) {
 488                 /* If the destination is a dir, enter it and use mode 1. */
 489                 if (S_ISDIR(st.st_mode)) {
 490                         if (!push_dir(dest_path, 0)) {
 491                                 rsyserr(FERROR, errno, "push_dir#1 %s failed",
 492                                         full_fname(dest_path));
 493                                 exit_cleanup(RERR_FILESELECT);
 494                         }
 495                         return NULL;
 496                 }
 497                 if (file_total > 1) {
 498                         rprintf(FERROR,
 499                                 "ERROR: destination must be a directory when"
 500                                 " copying more than 1 file\n");
 501                         exit_cleanup(RERR_FILESELECT);
 502                 }
 503                 if (file_total == 1 && S_ISDIR(flist->files[0]->mode)) {
 504                         rprintf(FERROR,
 505                                 "ERROR: cannot overwrite non-directory"
 506                                 " with a directory\n");
 507                         exit_cleanup(RERR_FILESELECT);
 508                 }
 509         } else if (errno != ENOENT) {
 510                 /* If we don't know what's at the destination, fail. */
 511                 rsyserr(FERROR, errno, "ERROR: cannot stat destination %s",
 512                         full_fname(dest_path));
 513                 exit_cleanup(RERR_FILESELECT);
 514         }
 515
 516         cp = strrchr(dest_path, '/');
 517
 518         /* If we need a destination directory because the transfer is not
 519          * of a single non-directory or the user has requested one via a
 520          * destination path ending in a slash, create one and use mode 1. */
 521         if (file_total > 1 || (cp && !cp[1])) {
 522                 /* Lop off the final slash (if any). */
 523                 if (cp && !cp[1])
 524                         *cp = '\0';
 525
 526                 if (statret == 0) {
 527                         rprintf(FERROR,
 528                             "ERROR: destination path is not a directory\n");
 529                         exit_cleanup(RERR_SYNTAX);
 530                 }
 531
 532                 if (mkdir_defmode(dest_path) != 0) {
 533                         rsyserr(FERROR, errno, "mkdir %s failed",
 534                                 full_fname(dest_path));
 535                         exit_cleanup(RERR_FILEIO);
 536                 }
 537
 538                 new_root_dir = 1;
 539
 540                 if (verbose)
 541                         rprintf(FINFO, "created directory %s\n", dest_path);
 542
 543                 if (dry_run) {
 544                         /* Indicate that dest dir doesn't really exist. */
 545                         dry_run++;
 546                 }
 547
 548                 if (!push_dir(dest_path, dry_run > 1)) {
 549                         rsyserr(FERROR, errno, "push_dir#2 %s failed",
 550                                 full_fname(dest_path));
 551                         exit_cleanup(RERR_FILESELECT);
 552                 }
 553
 554                 return NULL;
 555         }
 556
 557         /* Otherwise, we are writing a single file, possibly on top of an
 558          * existing non-directory.  Change to the item's parent directory
 559          * (if it has a path component), return the basename of the
 560          * destination file as the local name, and use mode 2. */
 561         if (!cp)
 562                 return dest_path;
 563
 564         if (cp == dest_path)
 565                 dest_path = "/";
 566
 567         *cp = '\0';
 568         if (!push_dir(dest_path, 0)) {
 569                 rsyserr(FERROR, errno, "push_dir#3 %s failed",
 570                         full_fname(dest_path));
 571                 exit_cleanup(RERR_FILESELECT);
 572         }
 573         *cp = '/';
 574
 575         return cp + 1;
 576 }
 577
 578 /* Call this if the destination dir (which is assumed to be in curr_dir)
 579  * does not yet exist and we can't create it due to being in dry-run
 580  * mode.  We'll fix dirs that can be relative to the non-existent dir. */
 581 static void fix_basis_dirs(void)
 582 {
 583         char **dir, *new, *slash;
 584         int len;
 585
 586         if (dry_run <= 1)
 587                 return;
 588
 589         slash = strrchr(curr_dir, '/');
 590
 591         for (dir = basis_dir; *dir; dir++) {
 592                 if (**dir == '/')
 593                         continue;
 594                 len = curr_dir_len + 1 + strlen(*dir) + 1;
 595                 if (!(new = new_array(char, len)))
 596                         out_of_memory("fix_basis_dirs");
 597                 if (slash && strncmp(*dir, "../", 3) == 0) {
 598                     /* We want to remove only one leading "../" prefix for
 599                      * the directory we couldn't create in dry-run mode:
 600                      * this ensures that any other ".." references get
 601                      * evaluated the same as they would for a live copy. */
 602                     *slash = '\0';
 603                     pathjoin(new, len, curr_dir, *dir + 3);
 604                     *slash = '/';
 605                 } else
 606                     pathjoin(new, len, curr_dir, *dir);
 607                 *dir = new;
 608         }
 609 }
 610
 611 /* This is only called by the sender. */
 612 static void read_final_goodbye(int f_in, int f_out)
 613 {
 614         int i, iflags, xlen;
 615         uchar fnamecmp_type;
 616         char xname[MAXPATHLEN];
 617
 618         if (protocol_version < 29)
 619                 i = read_int(f_in);
 620         else {
 621                 i = read_ndx_and_attrs(f_in, f_out, &iflags,
 622                                        &fnamecmp_type, xname, &xlen);
 623         }
 624
 625         if (i != NDX_DONE) {
 626                 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
 627                         i, who_am_i());
 628                 exit_cleanup(RERR_PROTOCOL);
 629         }
 630 }
 631
 632 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
 633 {
 634         struct file_list *flist;
 635         char *dir = argv[0];
 636
 637         if (verbose > 2) {
 638                 rprintf(FINFO, "server_sender starting pid=%ld\n",
 639                         (long)getpid());
 640         }
 641
 642         if (am_daemon && lp_write_only(module_id)) {
 643                 rprintf(FERROR, "ERROR: module is write only\n");
 644                 exit_cleanup(RERR_SYNTAX);
 645                 return;
 646         }
 647         if (am_daemon && lp_read_only(module_id) && remove_source_files) {
 648                 rprintf(FERROR,
 649                     "ERROR: --remove-%s-files cannot be used with a read-only module\n",
 650                     remove_source_files == 1 ? "source" : "sent");
 651                 exit_cleanup(RERR_SYNTAX);
 652                 return;
 653         }
 654
 655         if (!relative_paths) {
 656                 if (!push_dir(dir, 0)) {
 657                         rsyserr(FERROR, errno, "push_dir#3 %s failed",
 658                                 full_fname(dir));
 659                         exit_cleanup(RERR_FILESELECT);
 660                 }
 661         }
 662         argc--;
 663         argv++;
 664
 665         if (argc == 0 && (recurse || list_only)) {
 666                 argc = 1;
 667                 argv--;
 668                 argv[0] = ".";
 669         }
 670
 671         flist = send_file_list(f_out,argc,argv);
 672         if (!flist || flist->count == 0)
 673                 exit_cleanup(0);
 674
 675         io_start_buffering_in(f_in);
 676
 677         send_files(f_in, f_out);
 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, 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 #ifdef SUPPORT_HARD_LINKS
 698         if (preserve_hard_links)
 699                 match_hard_links();
 700 #endif
 701
 702         if (fd_pair(error_pipe) < 0) {
 703                 rsyserr(FERROR, errno, "pipe failed in do_recv");
 704                 exit_cleanup(RERR_IPC);
 705         }
 706
 707         io_flush(NORMAL_FLUSH);
 708
 709         if ((pid = do_fork()) == -1) {
 710                 rsyserr(FERROR, errno, "fork failed in do_recv");
 711                 exit_cleanup(RERR_IPC);
 712         }
 713
 714         if (pid == 0) {
 715                 close(error_pipe[0]);
 716                 if (f_in != f_out)
 717                         close(f_out);
 718
 719                 /* we can't let two processes write to the socket at one time */
 720                 io_end_multiplex_out();
 721
 722                 /* set place to send errors */
 723                 set_msg_fd_out(error_pipe[1]);
 724                 io_start_buffering_out(error_pipe[1]);
 725
 726                 recv_files(f_in, local_name);
 727                 io_flush(FULL_FLUSH);
 728                 handle_stats(f_in);
 729
 730                 send_msg(MSG_DONE, "", 1);
 731                 write_longint(error_pipe[1], stats.total_read);
 732                 io_flush(FULL_FLUSH);
 733
 734                 /* Handle any keep-alive packets from the post-processing work
 735                  * that the generator does. */
 736                 if (protocol_version >= 29) {
 737                         int iflags, xlen;
 738                         uchar fnamecmp_type;
 739                         char xname[MAXPATHLEN];
 740
 741                         kluge_around_eof = -1;
 742
 743                         /* This should only get stopped via a USR2 signal. */
 744                         read_ndx_and_attrs(f_in, -1, &iflags, &fnamecmp_type,
 745                                            xname, &xlen);
 746
 747                         rprintf(FERROR, "Invalid packet at end of run [%s]\n",
 748                                 who_am_i());
 749                         exit_cleanup(RERR_PROTOCOL);
 750                 }
 751
 752                 /* Finally, we go to sleep until our parent kills us with a
 753                  * USR2 signal.  We sleep for a short time, as on some OSes
 754                  * a signal won't interrupt a sleep! */
 755                 while (1)
 756                         msleep(20);
 757         }
 758
 759         am_generator = 1;
 760
 761         io_end_multiplex_in();
 762         if (write_batch && !am_server)
 763                 stop_write_batch();
 764
 765         close(error_pipe[1]);
 766         if (f_in != f_out)
 767                 close(f_in);
 768
 769         io_start_buffering_out(f_out);
 770
 771         set_msg_fd_in(error_pipe[0]);
 772         io_start_buffering_in(error_pipe[0]);
 773
 774         generate_files(f_out, local_name);
 775
 776         handle_stats(-1);
 777         io_flush(FULL_FLUSH);
 778         if (protocol_version >= 24) {
 779                 /* send a final goodbye message */
 780                 write_ndx(f_out, NDX_DONE);
 781         }
 782         io_flush(FULL_FLUSH);
 783
 784         set_msg_fd_in(-1);
 785         kill(pid, SIGUSR2);
 786         wait_process_with_flush(pid, &exit_code);
 787         return exit_code;
 788 }
 789
 790 static void do_server_recv(int f_in, int f_out, int argc, char *argv[])
 791 {
 792         int exit_code;
 793         struct file_list *flist;
 794         char *local_name = NULL;
 795         char *dir = NULL;
 796         int save_verbose = verbose;
 797
 798         if (filesfrom_fd >= 0) {
 799                 /* We can't mix messages with files-from data on the socket,
 800                  * so temporarily turn off verbose messages. */
 801                 verbose = 0;
 802         }
 803
 804         if (verbose > 2) {
 805                 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
 806                         argc, (long)getpid());
 807         }
 808
 809         if (am_daemon && lp_read_only(module_id)) {
 810                 rprintf(FERROR,"ERROR: module is read only\n");
 811                 exit_cleanup(RERR_SYNTAX);
 812                 return;
 813         }
 814
 815         if (argc > 0) {
 816                 dir = argv[0];
 817                 argc--;
 818                 argv++;
 819                 if (!am_daemon && !push_dir(dir, 0)) {
 820                         rsyserr(FERROR, errno, "push_dir#4 %s failed",
 821                                 full_fname(dir));
 822                         exit_cleanup(RERR_FILESELECT);
 823                 }
 824         }
 825
 826         if (protocol_version >= 30)
 827                 io_start_multiplex_in();
 828         else
 829                 io_start_buffering_in(f_in);
 830         recv_filter_list(f_in);
 831
 832         if (filesfrom_fd >= 0) {
 833                 /* We need to send the files-from names to the sender at the
 834                  * same time that we receive the file-list from them, so we
 835                  * need the IO routines to automatically write out the names
 836                  * onto our f_out socket as we read the file-list.  This
 837                  * avoids both deadlock and extra delays/buffers. */
 838                 io_set_filesfrom_fds(filesfrom_fd, f_out);
 839                 filesfrom_fd = -1;
 840         }
 841
 842         flist = recv_file_list(f_in);
 843         if (!flist) {
 844                 rprintf(FERROR,"server_recv: recv_file_list error\n");
 845                 exit_cleanup(RERR_FILESELECT);
 846         }
 847         if (inc_recurse && file_total == 1)
 848                 recv_additional_file_list(f_in);
 849         verbose = save_verbose;
 850
 851         if (argc > 0)
 852                 local_name = get_local_name(flist,argv[0]);
 853
 854         /* Now that we know what our destination directory turned out to be,
 855          * we can sanitize the --link-/copy-/compare-dest args correctly. */
 856         if (sanitize_paths) {
 857                 char **dir;
 858                 for (dir = basis_dir; *dir; dir++) {
 859                         *dir = sanitize_path(NULL, *dir, NULL, curr_dir_depth, NULL);
 860                 }
 861                 if (partial_dir) {
 862                         partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, NULL);
 863                 }
 864         }
 865         fix_basis_dirs();
 866
 867         if (server_filter_list.head) {
 868                 char **dir;
 869                 struct filter_list_struct *elp = &server_filter_list;
 870
 871                 for (dir = basis_dir; *dir; dir++) {
 872                         if (check_filter(elp, *dir, 1) < 0)
 873                                 goto options_rejected;
 874                 }
 875                 if (partial_dir && *partial_dir == '/'
 876                  && check_filter(elp, partial_dir, 1) < 0) {
 877                     options_rejected:
 878                         rprintf(FERROR,
 879                                 "Your options have been rejected by the server.\n");
 880                         exit_cleanup(RERR_SYNTAX);
 881                 }
 882         }
 883
 884         exit_code = do_recv(f_in, f_out, local_name);
 885         exit_cleanup(exit_code);
 886 }
 887
 888
 889 int child_main(int argc, char *argv[])
 890 {
 891         start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
 892         return 0;
 893 }
 894
 895
 896 void start_server(int f_in, int f_out, int argc, char *argv[])
 897 {
 898         set_nonblocking(f_in);
 899         set_nonblocking(f_out);
 900
 901         io_set_sock_fds(f_in, f_out);
 902         setup_protocol(f_out, f_in);
 903 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
 904         setup_iconv();
 905 #endif
 906
 907         if (protocol_version >= 23)
 908                 io_start_multiplex_out();
 909
 910         if (am_sender) {
 911                 keep_dirlinks = 0; /* Must be disabled on the sender. */
 912                 if (need_messages_from_generator)
 913                         io_start_multiplex_in();
 914                 recv_filter_list(f_in);
 915                 do_server_sender(f_in, f_out, argc, argv);
 916         } else
 917                 do_server_recv(f_in, f_out, argc, argv);
 918         exit_cleanup(0);
 919 }
 920
 921
 922 /*
 923  * This is called once the connection has been negotiated.  It is used
 924  * for rsyncd, remote-shell, and local connections.
 925  */
 926 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
 927 {
 928         struct file_list *flist = NULL;
 929         int exit_code = 0, exit_code2 = 0;
 930         char *local_name = NULL;
 931
 932         cleanup_child_pid = pid;
 933         if (!read_batch) {
 934                 set_nonblocking(f_in);
 935                 set_nonblocking(f_out);
 936         }
 937
 938         io_set_sock_fds(f_in, f_out);
 939         setup_protocol(f_out,f_in);
 940 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
 941         setup_iconv();
 942 #endif
 943
 944         /* We set our stderr file handle to blocking because ssh might have
 945          * set it to non-blocking.  This can be particularly troublesome if
 946          * stderr is a clone of stdout, because ssh would have set our stdout
 947          * to non-blocking at the same time (which can easily cause us to lose
 948          * output from our print statements).  This kluge shouldn't cause ssh
 949          * any problems for how we use it.  Note also that we delayed setting
 950          * this until after the above protocol setup so that we know for sure
 951          * that ssh is done twiddling its file descriptors.  */
 952         set_blocking(STDERR_FILENO);
 953
 954         if (am_sender) {
 955                 keep_dirlinks = 0; /* Must be disabled on the sender. */
 956                 if (protocol_version >= 30)
 957                         io_start_multiplex_out();
 958                 else
 959                         io_start_buffering_out(f_out);
 960                 if (!filesfrom_host)
 961                         set_msg_fd_in(f_in);
 962                 send_filter_list(f_out);
 963                 if (filesfrom_host)
 964                         filesfrom_fd = f_in;
 965
 966                 if (write_batch && !am_server)
 967                         start_write_batch(f_out);
 968                 flist = send_file_list(f_out, argc, argv);
 969                 set_msg_fd_in(-1);
 970                 if (verbose > 3)
 971                         rprintf(FINFO,"file list sent\n");
 972
 973                 if (protocol_version >= 23)
 974                         io_start_multiplex_in();
 975
 976                 io_flush(NORMAL_FLUSH);
 977                 send_files(f_in, f_out);
 978                 io_flush(FULL_FLUSH);
 979                 handle_stats(-1);
 980                 if (protocol_version >= 24)
 981                         read_final_goodbye(f_in, f_out);
 982                 if (pid != -1) {
 983                         if (verbose > 3)
 984                                 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
 985                         io_flush(FULL_FLUSH);
 986                         wait_process_with_flush(pid, &exit_code);
 987                 }
 988                 output_summary();
 989                 io_flush(FULL_FLUSH);
 990                 exit_cleanup(exit_code);
 991         }
 992
 993         if (!read_batch) {
 994                 if (protocol_version >= 23)
 995                         io_start_multiplex_in();
 996                 if (need_messages_from_generator)
 997                         io_start_multiplex_out();
 998         }
 999
1000         if (argc == 0)
1001                 list_only |= 1;
1002
1003         send_filter_list(read_batch ? -1 : f_out);
1004
1005         if (filesfrom_fd >= 0) {
1006                 io_set_filesfrom_fds(filesfrom_fd, f_out);
1007                 filesfrom_fd = -1;
1008         }
1009
1010         if (write_batch && !am_server)
1011                 start_write_batch(f_in);
1012         flist = recv_file_list(f_in);
1013         if (inc_recurse && file_total == 1)
1014                 recv_additional_file_list(f_in);
1015
1016         if (flist && flist->count > 0) {
1017                 local_name = get_local_name(flist, argv[0]);
1018
1019                 fix_basis_dirs();
1020
1021                 exit_code2 = do_recv(f_in, f_out, local_name);
1022         } else {
1023                 handle_stats(-1);
1024                 output_summary();
1025         }
1026
1027         if (pid != -1) {
1028                 if (verbose > 3)
1029                         rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
1030                 io_flush(FULL_FLUSH);
1031                 wait_process_with_flush(pid, &exit_code);
1032         }
1033
1034         return MAX(exit_code, exit_code2);
1035 }
1036
1037 static int copy_argv(char *argv[])
1038 {
1039         int i;
1040
1041         for (i = 0; argv[i]; i++) {
1042                 if (!(argv[i] = strdup(argv[i]))) {
1043                         rprintf (FERROR, "out of memory at %s(%d)\n",
1044                                  __FILE__, __LINE__);
1045                         return RERR_MALLOC;
1046                 }
1047         }
1048
1049         return 0;
1050 }
1051
1052
1053 /**
1054  * Start a client for either type of remote connection.  Work out
1055  * whether the arguments request a remote shell or rsyncd connection,
1056  * and call the appropriate connection function, then run_client.
1057  *
1058  * Calls either start_socket_client (for sockets) or do_cmd and
1059  * client_run (for ssh).
1060  **/
1061 static int start_client(int argc, char *argv[])
1062 {
1063         char *p;
1064         char *shell_machine = NULL;
1065         char *shell_path = NULL;
1066         char *shell_user = NULL;
1067         int ret;
1068         pid_t pid;
1069         int f_in,f_out;
1070         int rc;
1071
1072         /* Don't clobber argv[] so that ps(1) can still show the right
1073          * command line. */
1074         if ((rc = copy_argv(argv)))
1075                 return rc;
1076
1077         if (!read_batch) { /* for read_batch, NO source is specified */
1078                 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1079                 if (shell_path) { /* source is remote */
1080                         char *dummy1;
1081                         int dummy2;
1082                         if (--argc
1083                          && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
1084                                 rprintf(FERROR,
1085                                         "The source and destination cannot both be remote.\n");
1086                                 exit_cleanup(RERR_SYNTAX);
1087                         }
1088                         argv++;
1089                         if (filesfrom_host && *filesfrom_host
1090                             && strcmp(filesfrom_host, shell_machine) != 0) {
1091                                 rprintf(FERROR,
1092                                         "--files-from hostname is not the same as the transfer hostname\n");
1093                                 exit_cleanup(RERR_SYNTAX);
1094                         }
1095                         if (rsync_port) {
1096                                 if (!shell_cmd) {
1097                                         return start_socket_client(shell_machine,
1098                                                                    shell_path,
1099                                                                    argc, argv);
1100                                 }
1101                                 daemon_over_rsh = 1;
1102                         }
1103
1104                         am_sender = 0;
1105                 } else { /* source is local, check dest arg */
1106                         am_sender = 1;
1107
1108                         if (argc > 1)
1109                                 p = argv[--argc];
1110                         else {
1111                                 p = ".";
1112                                 list_only = 1;
1113                         }
1114
1115                         shell_path = check_for_hostspec(p, &shell_machine, &rsync_port);
1116                         if (shell_path && filesfrom_host && *filesfrom_host
1117                             && strcmp(filesfrom_host, shell_machine) != 0) {
1118                                 rprintf(FERROR,
1119                                         "--files-from hostname is not the same as the transfer hostname\n");
1120                                 exit_cleanup(RERR_SYNTAX);
1121                         }
1122                         if (!shell_path) { /* no hostspec found, so src & dest are local */
1123                                 local_server = 1;
1124                                 if (filesfrom_host) {
1125                                         rprintf(FERROR,
1126                                                 "--files-from cannot be remote when the transfer is local\n");
1127                                         exit_cleanup(RERR_SYNTAX);
1128                                 }
1129                                 shell_machine = NULL;
1130                                 shell_path = p;
1131                         } else if (rsync_port) {
1132                                 if (!shell_cmd) {
1133                                         return start_socket_client(shell_machine,
1134                                                                    shell_path,
1135                                                                    argc, argv);
1136                                 }
1137                                 daemon_over_rsh = 1;
1138                         }
1139                 }
1140         } else {  /* read_batch */
1141                 local_server = 1;
1142                 shell_path = argv[argc-1];
1143                 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
1144                         rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1145                         exit_cleanup(RERR_SYNTAX);
1146                 }
1147         }
1148
1149         if (password_file && !daemon_over_rsh) {
1150                 rprintf(FERROR, "The --password-file option may only be "
1151                                 "used when accessing an rsync daemon.\n");
1152                 exit_cleanup(RERR_SYNTAX);
1153         }
1154
1155         if (shell_machine) {
1156                 p = strrchr(shell_machine,'@');
1157                 if (p) {
1158                         *p = 0;
1159                         shell_user = shell_machine;
1160                         shell_machine = p+1;
1161                 }
1162         }
1163
1164         if (verbose > 3) {
1165                 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1166                         shell_cmd ? shell_cmd : "",
1167                         shell_machine ? shell_machine : "",
1168                         shell_user ? shell_user : "",
1169                         shell_path ? shell_path : "");
1170         }
1171
1172         /* for remote source, only single dest arg can remain ... */
1173         if (!am_sender && argc > 1) {
1174                 usage(FERROR);
1175                 exit_cleanup(RERR_SYNTAX);
1176         }
1177
1178         /* ... or no dest at all */
1179         if (!am_sender && argc == 0)
1180                 list_only |= 1;
1181
1182         pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1183                      &f_in,&f_out);
1184
1185         /* if we're running an rsync server on the remote host over a
1186          * remote shell command, we need to do the RSYNCD protocol first */
1187         if (daemon_over_rsh) {
1188                 int tmpret;
1189                 tmpret = start_inband_exchange(shell_user, shell_path,
1190                                                f_in, f_out, argc);
1191                 if (tmpret < 0)
1192                         return tmpret;
1193         }
1194
1195         ret = client_run(f_in, f_out, pid, argc, argv);
1196
1197         fflush(stdout);
1198         fflush(stderr);
1199
1200         return ret;
1201 }
1202
1203
1204 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1205 {
1206         exit_cleanup(RERR_SIGNAL1);
1207 }
1208
1209 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1210 {
1211         if (!am_server)
1212                 output_summary();
1213         close_all();
1214         if (log_got_error)
1215                 _exit(RERR_PARTIAL);
1216         _exit(0);
1217 }
1218
1219 RETSIGTYPE remember_children(UNUSED(int val))
1220 {
1221 #ifdef WNOHANG
1222         int cnt, status;
1223         pid_t pid;
1224         /* An empty waitpid() loop was put here by Tridge and we could never
1225          * get him to explain why he put it in, so rather than taking it
1226          * out we're instead saving the child exit statuses for later use.
1227          * The waitpid() loop presumably eliminates all possibility of leaving
1228          * zombie children, maybe that's why he did it. */
1229         while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1230                 /* save the child's exit status */
1231                 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1232                         if (pid_stat_table[cnt].pid == 0) {
1233                                 pid_stat_table[cnt].pid = pid;
1234                                 pid_stat_table[cnt].status = status;
1235                                 break;
1236                         }
1237                 }
1238         }
1239 #endif
1240 #ifndef HAVE_SIGACTION
1241         signal(SIGCHLD, remember_children);
1242 #endif
1243 }
1244
1245
1246 /**
1247  * This routine catches signals and tries to send them to gdb.
1248  *
1249  * Because it's called from inside a signal handler it ought not to
1250  * use too many library routines.
1251  *
1252  * @todo Perhaps use "screen -X" instead/as well, to help people
1253  * debugging without easy access to X.  Perhaps use an environment
1254  * variable, or just call a script?
1255  *
1256  * @todo The /proc/ magic probably only works on Linux (and
1257  * Solaris?)  Can we be more portable?
1258  **/
1259 #ifdef MAINTAINER_MODE
1260 const char *get_panic_action(void)
1261 {
1262         const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1263
1264         if (cmd_fmt)
1265                 return cmd_fmt;
1266         else
1267                 return "xterm -display :0 -T Panic -n Panic "
1268                         "-e gdb /proc/%d/exe %d";
1269 }
1270
1271
1272 /**
1273  * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1274  *
1275  * This signal handler is only installed if we were configured with
1276  * --enable-maintainer-mode.  Perhaps it should always be on and we
1277  * should just look at the environment variable, but I'm a bit leery
1278  * of a signal sending us into a busy loop.
1279  **/
1280 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1281 {
1282         char cmd_buf[300];
1283         int ret;
1284
1285         snprintf(cmd_buf, sizeof cmd_buf, get_panic_action(),
1286                  getpid(), getpid());
1287
1288         /* Unless we failed to execute gdb, we allow the process to
1289          * continue.  I'm not sure if that's right. */
1290         ret = system(cmd_buf);
1291         if (ret)
1292                 _exit(ret);
1293 }
1294 #endif
1295
1296
1297 int main(int argc,char *argv[])
1298 {
1299         int ret;
1300         int orig_argc = argc;
1301         char **orig_argv = argv;
1302 #ifdef HAVE_SIGACTION
1303 # ifdef HAVE_SIGPROCMASK
1304         sigset_t sigmask;
1305
1306         sigemptyset(&sigmask);
1307 # endif
1308         sigact.sa_flags = SA_NOCLDSTOP;
1309 #endif
1310         SIGACTMASK(SIGUSR1, sigusr1_handler);
1311         SIGACTMASK(SIGUSR2, sigusr2_handler);
1312         SIGACTMASK(SIGCHLD, remember_children);
1313 #ifdef MAINTAINER_MODE
1314         SIGACTMASK(SIGSEGV, rsync_panic_handler);
1315         SIGACTMASK(SIGFPE, rsync_panic_handler);
1316         SIGACTMASK(SIGABRT, rsync_panic_handler);
1317         SIGACTMASK(SIGBUS, rsync_panic_handler);
1318 #endif
1319
1320         starttime = time(NULL);
1321         am_root = (MY_UID() == 0);
1322
1323         memset(&stats, 0, sizeof(stats));
1324
1325         if (argc < 2) {
1326                 usage(FERROR);
1327                 exit_cleanup(RERR_SYNTAX);
1328         }
1329
1330         /* we set a 0 umask so that correct file permissions can be
1331          * carried across */
1332         orig_umask = umask(0);
1333
1334 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1335         setlocale(LC_CTYPE, "");
1336 #endif
1337
1338         if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1339                 /* FIXME: We ought to call the same error-handling
1340                  * code here, rather than relying on getopt. */
1341                 option_error();
1342                 exit_cleanup(RERR_SYNTAX);
1343         }
1344
1345         SIGACTMASK(SIGINT, sig_int);
1346         SIGACTMASK(SIGHUP, sig_int);
1347         SIGACTMASK(SIGTERM, sig_int);
1348 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1349         sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1350 #endif
1351
1352         /* Ignore SIGPIPE; we consistently check error codes and will
1353          * see the EPIPE. */
1354         SIGACTION(SIGPIPE, SIG_IGN);
1355 #ifdef SIGXFSZ
1356         SIGACTION(SIGXFSZ, SIG_IGN);
1357 #endif
1358
1359         /* Initialize push_dir here because on some old systems getcwd
1360          * (implemented by forking "pwd" and reading its output) doesn't
1361          * work when there are other child processes.  Also, on all systems
1362          * that implement getcwd that way "pwd" can't be found after chroot. */
1363         push_dir(NULL, 0);
1364
1365         init_flist();
1366
1367         if ((write_batch || read_batch) && !am_server) {
1368                 if (write_batch)
1369                         write_batch_shell_file(orig_argc, orig_argv, argc);
1370
1371                 if (read_batch && strcmp(batch_name, "-") == 0)
1372                         batch_fd = STDIN_FILENO;
1373                 else {
1374                         batch_fd = do_open(batch_name,
1375                                    write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1376                                    : O_RDONLY, S_IRUSR | S_IWUSR);
1377                 }
1378                 if (batch_fd < 0) {
1379                         rsyserr(FERROR, errno, "Batch file %s open error",
1380                                 full_fname(batch_name));
1381                         exit_cleanup(RERR_FILEIO);
1382                 }
1383                 if (read_batch)
1384                         read_stream_flags(batch_fd);
1385                 else
1386                         write_stream_flags(batch_fd);
1387
1388         }
1389         if (write_batch < 0)
1390                 dry_run = 1;
1391
1392         if (am_daemon && !am_server)
1393                 return daemon_main();
1394
1395         if (argc < 1) {
1396                 usage(FERROR);
1397                 exit_cleanup(RERR_SYNTAX);
1398         }
1399
1400         if (am_server) {
1401                 set_nonblocking(STDIN_FILENO);
1402                 set_nonblocking(STDOUT_FILENO);
1403                 if (am_daemon)
1404                         return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1405                 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1406         }
1407
1408         ret = start_client(argc, argv);
1409         if (ret == -1)
1410                 exit_cleanup(RERR_STARTCLIENT);
1411         else
1412                 exit_cleanup(ret);
1413
1414         return ret;
1415 }