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 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
  22  */
  23
  24 #include "rsync.h"
  25 #if defined CONFIG_LOCALE && defined HAVE_LOCALE_H
  26 #include <locale.h>
  27 #endif
  28
  29 extern int verbose;
  30 extern int dry_run;
  31 extern int list_only;
  32 extern int am_root;
  33 extern int am_server;
  34 extern int am_sender;
  35 extern int am_generator;
  36 extern int am_daemon;
  37 extern int blocking_io;
  38 extern int remove_source_files;
  39 extern int daemon_over_rsh;
  40 extern int need_messages_from_generator;
  41 extern int kluge_around_eof;
  42 extern int do_stats;
  43 extern int log_got_error;
  44 extern int module_id;
  45 extern int copy_links;
  46 extern int copy_dirlinks;
  47 extern int keep_dirlinks;
  48 extern int preserve_hard_links;
  49 extern int protocol_version;
  50 extern int recurse;
  51 extern int relative_paths;
  52 extern int sanitize_paths;
  53 extern int curr_dir_depth;
  54 extern int curr_dir_len;
  55 extern int module_id;
  56 extern int rsync_port;
  57 extern int whole_file;
  58 extern int read_batch;
  59 extern int write_batch;
  60 extern int batch_fd;
  61 extern int batch_gen_fd;
  62 extern int filesfrom_fd;
  63 extern pid_t cleanup_child_pid;
  64 extern struct stats stats;
  65 extern char *filesfrom_host;
  66 extern char *partial_dir;
  67 extern char *basis_dir[];
  68 extern char *rsync_path;
  69 extern char *shell_cmd;
  70 extern char *batch_name;
  71 extern char curr_dir[MAXPATHLEN];
  72 extern struct filter_list_struct server_filter_list;
  73
  74 int local_server = 0;
  75 int new_root_dir = 0;
  76 mode_t orig_umask = 0;
  77 struct file_list *the_file_list;
  78
  79 /* There's probably never more than at most 2 outstanding child processes,
  80  * but set it higher, just in case. */
  81 #define MAXCHILDPROCS 7
  82
  83 #ifdef HAVE_SIGACTION
  84 # ifdef HAVE_SIGPROCMASK
  85 #  define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
  86 # else
  87 #  define SIGACTMASK(n,h) SIGACTION(n,h)
  88 # endif
  89 static struct sigaction sigact;
  90 #endif
  91
  92 struct pid_status {
  93         pid_t pid;
  94         int status;
  95 } pid_stat_table[MAXCHILDPROCS];
  96
  97 static time_t starttime, endtime;
  98 static int64 total_read, total_written;
  99
 100 static void show_malloc_stats(void);
 101
 102 /* Works like waitpid(), but if we already harvested the child pid in our
 103  * remember_children(), we succeed instead of returning an error. */
 104 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
 105 {
 106         pid_t waited_pid = waitpid(pid, status_ptr, flags);
 107
 108         if (waited_pid == -1 && errno == ECHILD) {
 109                 /* Status of requested child no longer available:  check to
 110                  * see if it was processed by remember_children(). */
 111                 int cnt;
 112                 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
 113                         if (pid == pid_stat_table[cnt].pid) {
 114                                 *status_ptr = pid_stat_table[cnt].status;
 115                                 pid_stat_table[cnt].pid = 0;
 116                                 return pid;
 117                         }
 118                 }
 119         }
 120
 121         return waited_pid;
 122 }
 123
 124 /* Wait for a process to exit, calling io_flush while waiting. */
 125 static void wait_process_with_flush(pid_t pid, int *exit_code_ptr)
 126 {
 127         pid_t waited_pid;
 128         int status;
 129
 130         while ((waited_pid = wait_process(pid, &status, WNOHANG)) == 0) {
 131                 msleep(20);
 132                 io_flush(FULL_FLUSH);
 133         }
 134
 135         /* TODO: If the child exited on a signal, then log an
 136          * appropriate error message.  Perhaps we should also accept a
 137          * message describing the purpose of the child.  Also indicate
 138          * this to the caller so that they know something went wrong. */
 139         if (waited_pid < 0) {
 140                 rsyserr(FERROR, errno, "waitpid");
 141                 *exit_code_ptr = RERR_WAITCHILD;
 142         } else if (!WIFEXITED(status)) {
 143 #ifdef WCOREDUMP
 144                 if (WCOREDUMP(status))
 145                         *exit_code_ptr = RERR_CRASHED;
 146                 else
 147 #endif
 148                 if (WIFSIGNALED(status))
 149                         *exit_code_ptr = RERR_TERMINATED;
 150                 else
 151                         *exit_code_ptr = RERR_WAITCHILD;
 152         } else
 153                 *exit_code_ptr = WEXITSTATUS(status);
 154 }
 155
 156 /* This function gets called from all 3 processes.  We want the client side
 157  * to actually output the text, but the sender is the only process that has
 158  * all the stats we need.  So, if we're a client sender, we do the report.
 159  * If we're a server sender, we write the stats on the supplied fd.  If
 160  * we're the client receiver we read the stats from the supplied fd and do
 161  * the report.  All processes might also generate a set of debug stats, if
 162  * the verbose level is high enough (this is the only thing that the
 163  * generator process and the server receiver ever do here). */
 164 static void handle_stats(int f)
 165 {
 166         endtime = time(NULL);
 167
 168         /* Cache two stats because the read/write code can change it. */
 169         total_read = stats.total_read;
 170         total_written = stats.total_written;
 171
 172         if (do_stats && verbose > 1) {
 173                 /* These come out from every process */
 174                 show_malloc_stats();
 175                 show_flist_stats();
 176         }
 177
 178         if (am_generator)
 179                 return;
 180
 181         if (am_daemon) {
 182                 if (f == -1 || !am_sender)
 183                         return;
 184         }
 185
 186         if (am_server) {
 187                 if (am_sender) {
 188                         write_longint(f, total_read);
 189                         write_longint(f, total_written);
 190                         write_longint(f, stats.total_size);
 191                         if (protocol_version >= 29) {
 192                                 write_longint(f, stats.flist_buildtime);
 193                                 write_longint(f, stats.flist_xfertime);
 194                         }
 195                 }
 196                 return;
 197         }
 198
 199         /* this is the client */
 200
 201         if (f < 0 && !am_sender) /* e.g. when we got an empty file list. */
 202                 ;
 203         else if (!am_sender) {
 204                 /* Read the first two in opposite order because the meaning of
 205                  * read/write swaps when switching from sender to receiver. */
 206                 total_written = read_longint(f);
 207                 total_read = read_longint(f);
 208                 stats.total_size = read_longint(f);
 209                 if (protocol_version >= 29) {
 210                         stats.flist_buildtime = read_longint(f);
 211                         stats.flist_xfertime = read_longint(f);
 212                 }
 213         } else if (write_batch) {
 214                 /* The --read-batch process is going to be a client
 215                  * receiver, so we need to give it the stats. */
 216                 write_longint(batch_fd, total_read);
 217                 write_longint(batch_fd, total_written);
 218                 write_longint(batch_fd, stats.total_size);
 219                 if (protocol_version >= 29) {
 220                         write_longint(batch_fd, stats.flist_buildtime);
 221                         write_longint(batch_fd, stats.flist_xfertime);
 222                 }
 223         }
 224 }
 225
 226 static void output_summary(void)
 227 {
 228         if (do_stats) {
 229                 rprintf(FCLIENT, "\n");
 230                 rprintf(FINFO,"Number of files: %d\n", stats.num_files);
 231                 rprintf(FINFO,"Number of files transferred: %d\n",
 232                         stats.num_transferred_files);
 233                 rprintf(FINFO,"Total file size: %s bytes\n",
 234                         human_num(stats.total_size));
 235                 rprintf(FINFO,"Total transferred file size: %s bytes\n",
 236                         human_num(stats.total_transferred_size));
 237                 rprintf(FINFO,"Literal data: %s bytes\n",
 238                         human_num(stats.literal_data));
 239                 rprintf(FINFO,"Matched data: %s bytes\n",
 240                         human_num(stats.matched_data));
 241                 rprintf(FINFO,"File list size: %d\n", stats.flist_size);
 242                 if (stats.flist_buildtime) {
 243                         rprintf(FINFO,
 244                                 "File list generation time: %.3f seconds\n",
 245                                 (double)stats.flist_buildtime / 1000);
 246                         rprintf(FINFO,
 247                                 "File list transfer time: %.3f seconds\n",
 248                                 (double)stats.flist_xfertime / 1000);
 249                 }
 250                 rprintf(FINFO,"Total bytes sent: %s\n",
 251                         human_num(total_written));
 252                 rprintf(FINFO,"Total bytes received: %s\n",
 253                         human_num(total_read));
 254         }
 255
 256         if (verbose || do_stats) {
 257                 rprintf(FCLIENT, "\n");
 258                 rprintf(FINFO,
 259                         "sent %s bytes  received %s bytes  %s bytes/sec\n",
 260                         human_num(total_written), human_num(total_read),
 261                         human_dnum((total_written + total_read)/(0.5 + (endtime - starttime)), 2));
 262                 rprintf(FINFO, "total size is %s  speedup is %.2f\n",
 263                         human_num(stats.total_size),
 264                         (double)stats.total_size / (total_written+total_read));
 265         }
 266
 267         fflush(stdout);
 268         fflush(stderr);
 269 }
 270
 271
 272 /**
 273  * If our C library can get malloc statistics, then show them to FINFO
 274  **/
 275 static void show_malloc_stats(void)
 276 {
 277 #ifdef HAVE_MALLINFO
 278         struct mallinfo mi;
 279
 280         mi = mallinfo();
 281
 282         rprintf(FCLIENT, "\n");
 283         rprintf(FINFO, RSYNC_NAME "[%d] (%s%s%s) heap statistics:\n",
 284                 getpid(), am_server ? "server " : "",
 285                 am_daemon ? "daemon " : "", who_am_i());
 286         rprintf(FINFO, "  arena:     %10ld   (bytes from sbrk)\n",
 287                 (long)mi.arena);
 288         rprintf(FINFO, "  ordblks:   %10ld   (chunks not in use)\n",
 289                 (long)mi.ordblks);
 290         rprintf(FINFO, "  smblks:    %10ld\n",
 291                 (long)mi.smblks);
 292         rprintf(FINFO, "  hblks:     %10ld   (chunks from mmap)\n",
 293                 (long)mi.hblks);
 294         rprintf(FINFO, "  hblkhd:    %10ld   (bytes from mmap)\n",
 295                 (long)mi.hblkhd);
 296         rprintf(FINFO, "  allmem:    %10ld   (bytes from sbrk + mmap)\n",
 297                 (long)mi.arena + mi.hblkhd);
 298         rprintf(FINFO, "  usmblks:   %10ld\n",
 299                 (long)mi.usmblks);
 300         rprintf(FINFO, "  fsmblks:   %10ld\n",
 301                 (long)mi.fsmblks);
 302         rprintf(FINFO, "  uordblks:  %10ld   (bytes used)\n",
 303                 (long)mi.uordblks);
 304         rprintf(FINFO, "  fordblks:  %10ld   (bytes free)\n",
 305                 (long)mi.fordblks);
 306         rprintf(FINFO, "  keepcost:  %10ld   (bytes in releasable chunk)\n",
 307                 (long)mi.keepcost);
 308 #endif /* HAVE_MALLINFO */
 309 }
 310
 311
 312 /* Start the remote shell.   cmd may be NULL to use the default. */
 313 static pid_t do_cmd(char *cmd, char *machine, char *user, char *path,
 314                     int *f_in, int *f_out)
 315 {
 316         int i, argc = 0;
 317         char *args[MAX_ARGS];
 318         pid_t ret;
 319         char *dir = NULL;
 320         int dash_l_set = 0;
 321
 322         if (!read_batch && !local_server) {
 323                 char *t, *f, in_quote = '\0';
 324                 char *rsh_env = getenv(RSYNC_RSH_ENV);
 325                 if (!cmd)
 326                         cmd = rsh_env;
 327                 if (!cmd)
 328                         cmd = RSYNC_RSH;
 329                 cmd = strdup(cmd);
 330                 if (!cmd)
 331                         goto oom;
 332
 333                 for (t = f = cmd; *f; f++) {
 334                         if (*f == ' ')
 335                                 continue;
 336                         /* Comparison leaves rooms for server_options(). */
 337                         if (argc >= MAX_ARGS - MAX_SERVER_ARGS) {
 338                                 rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
 339                                 exit_cleanup(RERR_SYNTAX);
 340                         }
 341                         args[argc++] = t;
 342                         while (*f != ' ' || in_quote) {
 343                                 if (!*f) {
 344                                         if (in_quote) {
 345                                                 rprintf(FERROR,
 346                                                     "Missing trailing-%c in remote-shell command.\n",
 347                                                     in_quote);
 348                                                 exit_cleanup(RERR_SYNTAX);
 349                                         }
 350                                         f--;
 351                                         break;
 352                                 }
 353                                 if (*f == '\'' || *f == '"') {
 354                                         if (!in_quote) {
 355                                                 in_quote = *f++;
 356                                                 continue;
 357                                         }
 358                                         if (*f == in_quote && *++f != in_quote) {
 359                                                 in_quote = '\0';
 360                                                 continue;
 361                                         }
 362                                 }
 363                                 *t++ = *f++;
 364                         }
 365                         *t++ = '\0';
 366                 }
 367
 368                 /* check to see if we've already been given '-l user' in
 369                  * the remote-shell command */
 370                 for (i = 0; i < argc-1; i++) {
 371                         if (!strcmp(args[i], "-l") && args[i+1][0] != '-')
 372                                 dash_l_set = 1;
 373                 }
 374
 375 #ifdef HAVE_REMSH
 376                 /* remsh (on HPUX) takes the arguments the other way around */
 377                 args[argc++] = machine;
 378                 if (user && !(daemon_over_rsh && dash_l_set)) {
 379                         args[argc++] = "-l";
 380                         args[argc++] = user;
 381                 }
 382 #else
 383                 if (user && !(daemon_over_rsh && dash_l_set)) {
 384                         args[argc++] = "-l";
 385                         args[argc++] = user;
 386                 }
 387                 args[argc++] = machine;
 388 #endif
 389
 390                 args[argc++] = rsync_path;
 391
 392                 if (blocking_io < 0) {
 393                         char *cp;
 394                         if ((cp = strrchr(cmd, '/')) != NULL)
 395                                 cp++;
 396                         else
 397                                 cp = cmd;
 398                         if (strcmp(cp, "rsh") == 0 || strcmp(cp, "remsh") == 0)
 399                                 blocking_io = 1;
 400                 }
 401
 402                 server_options(args,&argc);
 403
 404                 if (argc >= MAX_ARGS - 2) {
 405                         rprintf(FERROR, "internal: args[] overflowed in do_cmd()\n");
 406                         exit_cleanup(RERR_SYNTAX);
 407                 }
 408         }
 409
 410         args[argc++] = ".";
 411
 412         if (!daemon_over_rsh && path && *path)
 413                 args[argc++] = path;
 414
 415         args[argc] = NULL;
 416
 417         if (verbose > 3) {
 418                 for (i = 0; i < argc; i++)
 419                         rprintf(FCLIENT, "cmd[%d]=%s ", i, args[i]);
 420                 rprintf(FCLIENT, "\n");
 421         }
 422
 423         if (read_batch) {
 424                 int from_gen_pipe[2];
 425                 if (fd_pair(from_gen_pipe) < 0) {
 426                         rsyserr(FERROR, errno, "pipe");
 427                         exit_cleanup(RERR_IPC);
 428                 }
 429                 batch_gen_fd = from_gen_pipe[0];
 430                 *f_out = from_gen_pipe[1];
 431                 *f_in = batch_fd;
 432                 ret = -1; /* no child pid */
 433         } else if (local_server) {
 434                 /* If the user didn't request --[no-]whole-file, force
 435                  * it on, but only if we're not batch processing. */
 436                 if (whole_file < 0 && !write_batch)
 437                         whole_file = 1;
 438                 ret = local_child(argc, args, f_in, f_out, child_main);
 439         } else
 440                 ret = piped_child(args,f_in,f_out);
 441
 442         if (dir)
 443                 free(dir);
 444
 445         return ret;
 446
 447   oom:
 448         out_of_memory("do_cmd");
 449         return 0; /* not reached */
 450 }
 451
 452 /* The receiving side operates in one of two modes:
 453  *
 454  * 1. it receives any number of files into a destination directory,
 455  * placing them according to their names in the file-list.
 456  *
 457  * 2. it receives a single file and saves it using the name in the
 458  * destination path instead of its file-list name.  This requires a
 459  * "local name" for writing out the destination file.
 460  *
 461  * So, our task is to figure out what mode/local-name we need.
 462  * For mode 1, we change into the destination directory and return NULL.
 463  * For mode 2, we change into the directory containing the destination
 464  * file (if we aren't already there) and return the local-name. */
 465 static char *get_local_name(struct file_list *flist, char *dest_path)
 466 {
 467         STRUCT_STAT st;
 468         int statret;
 469         char *cp;
 470
 471         if (verbose > 2) {
 472                 rprintf(FINFO, "get_local_name count=%d %s\n",
 473                         flist->count, NS(dest_path));
 474         }
 475
 476         if (!dest_path || list_only)
 477                 return NULL;
 478
 479         /* See what currently exists at the destination. */
 480         if ((statret = safe_stat(dest_path, &st)) == 0) {
 481                 /* If the destination is a dir, enter it and use mode 1. */
 482                 if (S_ISDIR(st.st_mode)) {
 483                         if (sanitize_paths)
 484                                 die_on_unsafe_path(dest_path, 0);
 485                         if (!push_dir(dest_path, 0)) {
 486                                 rsyserr(FERROR, errno, "push_dir#1 %s failed",
 487                                         full_fname(dest_path));
 488                                 exit_cleanup(RERR_FILESELECT);
 489                         }
 490                         return NULL;
 491                 }
 492                 if (sanitize_paths && S_ISLNK(st.st_mode))
 493                         die_on_unsafe_path(dest_path, 0);
 494                 if (flist->count > 1) {
 495                         rprintf(FERROR,
 496                                 "ERROR: destination must be a directory when"
 497                                 " copying more than 1 file\n");
 498                         exit_cleanup(RERR_FILESELECT);
 499                 }
 500                 /* Caution: flist->count could be 0! */
 501                 if (flist->count == 1 && S_ISDIR(flist->files[0]->mode)) {
 502                         rprintf(FERROR,
 503                                 "ERROR: cannot overwrite non-directory"
 504                                 " with a directory\n");
 505                         exit_cleanup(RERR_FILESELECT);
 506                 }
 507         } else if (errno != ENOENT) {
 508                 /* If we don't know what's at the destination, fail. */
 509                 rsyserr(FERROR, errno, "ERROR: cannot stat destination %s",
 510                         full_fname(dest_path));
 511                 exit_cleanup(RERR_FILESELECT);
 512         }
 513
 514         cp = strrchr(dest_path, '/');
 515
 516         /* If we need a destination directory because the transfer is not
 517          * of a single non-directory or the user has requested one via a
 518          * destination path ending in a slash, create one and use mode 1. */
 519         if (flist->count > 1 || (cp && !cp[1])) {
 520                 /* Lop off the final slash (if any). */
 521                 if (cp && !cp[1])
 522                         *cp = '\0';
 523
 524                 if (statret == 0) {
 525                         rprintf(FERROR,
 526                             "ERROR: destination path is not a directory\n");
 527                         exit_cleanup(RERR_SYNTAX);
 528                 }
 529
 530                 if (mkdir_defmode(dest_path) != 0) {
 531                         rsyserr(FERROR, errno, "mkdir %s failed",
 532                                 full_fname(dest_path));
 533                         exit_cleanup(RERR_FILEIO);
 534                 }
 535
 536                 new_root_dir = 1;
 537
 538                 if (verbose)
 539                         rprintf(FINFO, "created directory %s\n", dest_path);
 540
 541                 if (dry_run) {
 542                         /* Indicate that dest dir doesn't really exist. */
 543                         dry_run++;
 544                 }
 545
 546                 if (sanitize_paths)
 547                         die_on_unsafe_path(dest_path, 0);
 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 (sanitize_paths)
 569                 die_on_unsafe_path(dest_path, 0);
 570         if (!push_dir(dest_path, 0)) {
 571                 rsyserr(FERROR, errno, "push_dir#3 %s failed",
 572                         full_fname(dest_path));
 573                 exit_cleanup(RERR_FILESELECT);
 574         }
 575         *cp = '/';
 576
 577         return cp + 1;
 578 }
 579
 580 /* Call this if the destination dir (which is assumed to be in curr_dir)
 581  * does not yet exist and we can't create it due to being in dry-run
 582  * mode.  We'll fix dirs that can be relative to the non-existent dir. */
 583 static void fix_basis_dirs(void)
 584 {
 585         char **dir, *new, *slash;
 586         int len;
 587
 588         if (dry_run <= 1)
 589                 return;
 590
 591         slash = strrchr(curr_dir, '/');
 592
 593         for (dir = basis_dir; *dir; dir++) {
 594                 if (**dir == '/')
 595                         continue;
 596                 len = curr_dir_len + 1 + strlen(*dir) + 1;
 597                 if (!(new = new_array(char, len)))
 598                         out_of_memory("fix_basis_dirs");
 599                 if (slash && strncmp(*dir, "../", 3) == 0) {
 600                     /* We want to remove only one leading "../" prefix for
 601                      * the directory we couldn't create in dry-run mode:
 602                      * this ensures that any other ".." references get
 603                      * evaluated the same as they would for a live copy. */
 604                     *slash = '\0';
 605                     pathjoin(new, len, curr_dir, *dir + 3);
 606                     *slash = '/';
 607                 } else
 608                     pathjoin(new, len, curr_dir, *dir);
 609                 *dir = new;
 610         }
 611 }
 612
 613 /* This is only called by the sender. */
 614 static void read_final_goodbye(int f_in, int f_out)
 615 {
 616         int i;
 617
 618         if (protocol_version < 29)
 619                 i = read_int(f_in);
 620         else {
 621                 while ((i = read_int(f_in)) == the_file_list->count
 622                     && read_shortint(f_in) == ITEM_IS_NEW) {
 623                         /* Forward the keep-alive (no-op) to the receiver. */
 624                         write_int(f_out, the_file_list->count);
 625                         write_shortint(f_out, ITEM_IS_NEW);
 626                 }
 627         }
 628
 629         if (i != -1) {
 630                 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
 631                         i, who_am_i());
 632                 exit_cleanup(RERR_PROTOCOL);
 633         }
 634 }
 635
 636
 637 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
 638 {
 639         struct file_list *flist;
 640         char *dir = argv[0];
 641
 642         if (verbose > 2) {
 643                 rprintf(FINFO, "server_sender starting pid=%ld\n",
 644                         (long)getpid());
 645         }
 646
 647         if (am_daemon && lp_write_only(module_id)) {
 648                 rprintf(FERROR, "ERROR: module is write only\n");
 649                 exit_cleanup(RERR_SYNTAX);
 650                 return;
 651         }
 652         if (am_daemon && lp_read_only(module_id) && remove_source_files) {
 653                 rprintf(FERROR,
 654                     "ERROR: --remove-%s-files cannot be used with a read-only module\n",
 655                     remove_source_files == 1 ? "source" : "sent");
 656                 exit_cleanup(RERR_SYNTAX);
 657                 return;
 658         }
 659
 660         if (!relative_paths) {
 661                 if (sanitize_paths)
 662                         die_on_unsafe_path(dir, 0);
 663                 if (!push_dir(dir, 0)) {
 664                         rsyserr(FERROR, errno, "push_dir#3 %s failed",
 665                                 full_fname(dir));
 666                         exit_cleanup(RERR_FILESELECT);
 667                 }
 668         }
 669         argc--;
 670         argv++;
 671
 672         if (argc == 0 && (recurse || list_only)) {
 673                 argc = 1;
 674                 argv--;
 675                 argv[0] = ".";
 676         }
 677
 678         flist = send_file_list(f_out,argc,argv);
 679         if (!flist || flist->count == 0) {
 680                 exit_cleanup(0);
 681         }
 682         the_file_list = flist;
 683
 684         io_start_buffering_in();
 685         io_start_buffering_out();
 686
 687         send_files(flist,f_out,f_in);
 688         io_flush(FULL_FLUSH);
 689         handle_stats(f_out);
 690         if (protocol_version >= 24)
 691                 read_final_goodbye(f_in, f_out);
 692         io_flush(FULL_FLUSH);
 693         exit_cleanup(0);
 694 }
 695
 696
 697 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
 698 {
 699         int pid;
 700         int exit_code = 0;
 701         int error_pipe[2];
 702
 703         /* The receiving side mustn't obey this, or an existing symlink that
 704          * points to an identical file won't be replaced by the referent. */
 705         copy_links = copy_dirlinks = 0;
 706
 707         if (preserve_hard_links)
 708                 init_hard_links();
 709
 710         if (fd_pair(error_pipe) < 0) {
 711                 rsyserr(FERROR, errno, "pipe failed in do_recv");
 712                 exit_cleanup(RERR_IPC);
 713         }
 714
 715         io_flush(NORMAL_FLUSH);
 716
 717         if ((pid = do_fork()) == -1) {
 718                 rsyserr(FERROR, errno, "fork failed in do_recv");
 719                 exit_cleanup(RERR_IPC);
 720         }
 721
 722         if (pid == 0) {
 723                 close(error_pipe[0]);
 724                 if (f_in != f_out)
 725                         close(f_out);
 726
 727                 /* we can't let two processes write to the socket at one time */
 728                 close_multiplexing_out();
 729
 730                 /* set place to send errors */
 731                 set_msg_fd_out(error_pipe[1]);
 732
 733                 recv_files(f_in, flist, local_name);
 734                 io_flush(FULL_FLUSH);
 735                 handle_stats(f_in);
 736
 737                 send_msg(MSG_DONE, "", 0);
 738                 io_flush(FULL_FLUSH);
 739
 740                 /* Handle any keep-alive packets from the post-processing work
 741                  * that the generator does. */
 742                 if (protocol_version >= 29) {
 743                         kluge_around_eof = -1;
 744
 745                         /* This should only get stopped via a USR2 signal. */
 746                         while (read_int(f_in) == flist->count
 747                             && read_shortint(f_in) == ITEM_IS_NEW) {}
 748
 749                         rprintf(FERROR, "Invalid packet at end of run [%s]\n",
 750                                 who_am_i());
 751                         exit_cleanup(RERR_PROTOCOL);
 752                 }
 753
 754                 /* Finally, we go to sleep until our parent kills us with a
 755                  * USR2 signal.  We sleep for a short time, as on some OSes
 756                  * a signal won't interrupt a sleep! */
 757                 while (1)
 758                         msleep(20);
 759         }
 760
 761         am_generator = 1;
 762         close_multiplexing_in();
 763         if (write_batch && !am_server)
 764                 stop_write_batch();
 765
 766         close(error_pipe[1]);
 767         if (f_in != f_out)
 768                 close(f_in);
 769
 770         io_start_buffering_out();
 771
 772         set_msg_fd_in(error_pipe[0]);
 773
 774         generate_files(f_out, flist, 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_int(f_out, -1);
 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
 791 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
 792 {
 793         int exit_code;
 794         struct file_list *flist;
 795         char *local_name = NULL;
 796         char *dir = NULL;
 797         int save_verbose = verbose;
 798
 799         if (filesfrom_fd >= 0) {
 800                 /* We can't mix messages with files-from data on the socket,
 801                  * so temporarily turn off verbose messages. */
 802                 verbose = 0;
 803         }
 804
 805         if (verbose > 2) {
 806                 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
 807                         argc, (long)getpid());
 808         }
 809
 810         if (am_daemon && lp_read_only(module_id)) {
 811                 rprintf(FERROR,"ERROR: module is read only\n");
 812                 exit_cleanup(RERR_SYNTAX);
 813                 return;
 814         }
 815
 816         if (argc > 0) {
 817                 dir = argv[0];
 818                 argc--;
 819                 argv++;
 820                 if (!am_daemon && !push_dir(dir, 0)) {
 821                         rsyserr(FERROR, errno, "push_dir#4 %s failed",
 822                                 full_fname(dir));
 823                         exit_cleanup(RERR_FILESELECT);
 824                 }
 825         }
 826
 827         io_start_buffering_in();
 828         recv_filter_list(f_in);
 829
 830         if (filesfrom_fd >= 0) {
 831                 /* We need to send the files-from names to the sender at the
 832                  * same time that we receive the file-list from them, so we
 833                  * need the IO routines to automatically write out the names
 834                  * onto our f_out socket as we read the file-list.  This
 835                  * avoids both deadlock and extra delays/buffers. */
 836                 io_set_filesfrom_fds(filesfrom_fd, f_out);
 837                 filesfrom_fd = -1;
 838         }
 839
 840         flist = recv_file_list(f_in);
 841         verbose = save_verbose;
 842         if (!flist) {
 843                 rprintf(FERROR,"server_recv: recv_file_list error\n");
 844                 exit_cleanup(RERR_FILESELECT);
 845         }
 846         the_file_list = flist;
 847
 848         if (argc > 0)
 849                 local_name = get_local_name(flist,argv[0]);
 850
 851         /* Now that we know what our destination directory turned out to be,
 852          * we can sanitize the --link-/copy-/compare-dest args correctly. */
 853         if (sanitize_paths) {
 854                 char **dir;
 855                 for (dir = basis_dir; *dir; dir++) {
 856                         *dir = sanitize_path(NULL, *dir, NULL, curr_dir_depth, NULL);
 857                         die_on_unsafe_path(*dir, 0);
 858                 }
 859                 if (partial_dir) {
 860                         partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, NULL);
 861                         /* A relative path gets this checked at every dir change. */
 862                         if (*partial_dir == '/')
 863                                 die_on_unsafe_path(partial_dir, 0);
 864                 }
 865         }
 866         fix_basis_dirs();
 867
 868         if (server_filter_list.head) {
 869                 char **dir;
 870                 struct filter_list_struct *elp = &server_filter_list;
 871
 872                 for (dir = basis_dir; *dir; dir++) {
 873                         if (check_filter(elp, *dir, 1) < 0)
 874                                 goto options_rejected;
 875                 }
 876                 if (partial_dir && *partial_dir == '/'
 877                  && check_filter(elp, partial_dir, 1) < 0) {
 878                     options_rejected:
 879                         rprintf(FERROR,
 880                                 "Your options have been rejected by the server.\n");
 881                         exit_cleanup(RERR_SYNTAX);
 882                 }
 883         }
 884
 885         exit_code = do_recv(f_in,f_out,flist,local_name);
 886         exit_cleanup(exit_code);
 887 }
 888
 889
 890 int child_main(int argc, char *argv[])
 891 {
 892         start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
 893         return 0;
 894 }
 895
 896
 897 void start_server(int f_in, int f_out, int argc, char *argv[])
 898 {
 899         set_nonblocking(f_in);
 900         set_nonblocking(f_out);
 901
 902         io_set_sock_fds(f_in, f_out);
 903         setup_protocol(f_out, f_in);
 904 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
 905         setup_iconv();
 906 #endif
 907
 908         if (protocol_version >= 23)
 909                 io_start_multiplex_out();
 910
 911         if (am_sender) {
 912                 keep_dirlinks = 0; /* Must be disabled on the sender. */
 913                 if (need_messages_from_generator)
 914                         io_start_multiplex_in();
 915
 916                 recv_filter_list(f_in);
 917                 do_server_sender(f_in, f_out, argc, argv);
 918         } else {
 919                 do_server_recv(f_in, f_out, argc, argv);
 920         }
 921         exit_cleanup(0);
 922 }
 923
 924
 925 /*
 926  * This is called once the connection has been negotiated.  It is used
 927  * for rsyncd, remote-shell, and local connections.
 928  */
 929 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
 930 {
 931         struct file_list *flist = NULL;
 932         int exit_code = 0, exit_code2 = 0;
 933         char *local_name = NULL;
 934
 935         cleanup_child_pid = pid;
 936         if (!read_batch) {
 937                 set_nonblocking(f_in);
 938                 set_nonblocking(f_out);
 939         }
 940
 941         io_set_sock_fds(f_in, f_out);
 942         setup_protocol(f_out,f_in);
 943 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
 944         setup_iconv();
 945 #endif
 946
 947         if (protocol_version >= 23 && !read_batch)
 948                 io_start_multiplex_in();
 949
 950         /* We set our stderr file handle to blocking because ssh might have
 951          * set it to non-blocking.  This can be particularly troublesome if
 952          * stderr is a clone of stdout, because ssh would have set our stdout
 953          * to non-blocking at the same time (which can easily cause us to lose
 954          * output from our print statements).  This kluge shouldn't cause ssh
 955          * any problems for how we use it.  Note also that we delayed setting
 956          * this until after the above protocol setup so that we know for sure
 957          * that ssh is done twiddling its file descriptors.  */
 958         set_blocking(STDERR_FILENO);
 959
 960         if (am_sender) {
 961                 keep_dirlinks = 0; /* Must be disabled on the sender. */
 962                 io_start_buffering_out();
 963                 if (!filesfrom_host)
 964                         set_msg_fd_in(f_in);
 965                 send_filter_list(f_out);
 966                 if (filesfrom_host)
 967                         filesfrom_fd = f_in;
 968
 969                 if (write_batch && !am_server)
 970                         start_write_batch(f_out);
 971                 flist = send_file_list(f_out, argc, argv);
 972                 set_msg_fd_in(-1);
 973                 if (verbose > 3)
 974                         rprintf(FINFO,"file list sent\n");
 975                 the_file_list = flist;
 976
 977                 io_flush(NORMAL_FLUSH);
 978                 send_files(flist,f_out,f_in);
 979                 io_flush(FULL_FLUSH);
 980                 handle_stats(-1);
 981                 if (protocol_version >= 24)
 982                         read_final_goodbye(f_in, f_out);
 983                 if (pid != -1) {
 984                         if (verbose > 3)
 985                                 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
 986                         io_flush(FULL_FLUSH);
 987                         wait_process_with_flush(pid, &exit_code);
 988                 }
 989                 output_summary();
 990                 io_flush(FULL_FLUSH);
 991                 exit_cleanup(exit_code);
 992         }
 993
 994         if (need_messages_from_generator && !read_batch)
 995                 io_start_multiplex_out();
 996
 997         if (argc == 0)
 998                 list_only |= 1;
 999
1000         send_filter_list(read_batch ? -1 : f_out);
1001
1002         if (filesfrom_fd >= 0) {
1003                 io_set_filesfrom_fds(filesfrom_fd, f_out);
1004                 filesfrom_fd = -1;
1005         }
1006
1007         if (write_batch && !am_server)
1008                 start_write_batch(f_in);
1009         flist = recv_file_list(f_in);
1010         the_file_list = flist;
1011
1012         if (flist && flist->count > 0) {
1013                 local_name = get_local_name(flist, argv[0]);
1014
1015                 fix_basis_dirs();
1016
1017                 exit_code2 = do_recv(f_in, f_out, flist, local_name);
1018         } else {
1019                 handle_stats(-1);
1020                 output_summary();
1021         }
1022
1023         if (pid != -1) {
1024                 if (verbose > 3)
1025                         rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
1026                 io_flush(FULL_FLUSH);
1027                 wait_process_with_flush(pid, &exit_code);
1028         }
1029
1030         return MAX(exit_code, exit_code2);
1031 }
1032
1033 static int copy_argv (char *argv[])
1034 {
1035         int i;
1036
1037         for (i = 0; argv[i]; i++) {
1038                 if (!(argv[i] = strdup(argv[i]))) {
1039                         rprintf (FERROR, "out of memory at %s(%d)\n",
1040                                  __FILE__, __LINE__);
1041                         return RERR_MALLOC;
1042                 }
1043         }
1044
1045         return 0;
1046 }
1047
1048
1049 /**
1050  * Start a client for either type of remote connection.  Work out
1051  * whether the arguments request a remote shell or rsyncd connection,
1052  * and call the appropriate connection function, then run_client.
1053  *
1054  * Calls either start_socket_client (for sockets) or do_cmd and
1055  * client_run (for ssh).
1056  **/
1057 static int start_client(int argc, char *argv[])
1058 {
1059         char *p;
1060         char *shell_machine = NULL;
1061         char *shell_path = NULL;
1062         char *shell_user = NULL;
1063         int ret;
1064         pid_t pid;
1065         int f_in,f_out;
1066         int rc;
1067
1068         /* Don't clobber argv[] so that ps(1) can still show the right
1069          * command line. */
1070         if ((rc = copy_argv(argv)))
1071                 return rc;
1072
1073         if (!read_batch) { /* for read_batch, NO source is specified */
1074                 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1075                 if (shell_path) { /* source is remote */
1076                         char *dummy1;
1077                         int dummy2;
1078                         if (--argc
1079                          && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
1080                                 rprintf(FERROR,
1081                                         "The source and destination cannot both be remote.\n");
1082                                 exit_cleanup(RERR_SYNTAX);
1083                         }
1084                         argv++;
1085                         if (filesfrom_host && *filesfrom_host
1086                             && strcmp(filesfrom_host, shell_machine) != 0) {
1087                                 rprintf(FERROR,
1088                                         "--files-from hostname is not the same as the transfer hostname\n");
1089                                 exit_cleanup(RERR_SYNTAX);
1090                         }
1091                         if (rsync_port) {
1092                                 if (!shell_cmd) {
1093                                         return start_socket_client(shell_machine,
1094                                                                    shell_path,
1095                                                                    argc, argv);
1096                                 }
1097                                 daemon_over_rsh = 1;
1098                         }
1099
1100                         am_sender = 0;
1101                 } else { /* source is local, check dest arg */
1102                         am_sender = 1;
1103
1104                         if (argc > 1)
1105                                 p = argv[--argc];
1106                         else {
1107                                 p = ".";
1108                                 list_only = 1;
1109                         }
1110
1111                         shell_path = check_for_hostspec(p, &shell_machine, &rsync_port);
1112                         if (shell_path && filesfrom_host && *filesfrom_host
1113                             && strcmp(filesfrom_host, shell_machine) != 0) {
1114                                 rprintf(FERROR,
1115                                         "--files-from hostname is not the same as the transfer hostname\n");
1116                                 exit_cleanup(RERR_SYNTAX);
1117                         }
1118                         if (!shell_path) { /* no hostspec found, so src & dest are local */
1119                                 local_server = 1;
1120                                 if (filesfrom_host) {
1121                                         rprintf(FERROR,
1122                                                 "--files-from cannot be remote when the transfer is local\n");
1123                                         exit_cleanup(RERR_SYNTAX);
1124                                 }
1125                                 shell_machine = NULL;
1126                                 shell_path = p;
1127                         } else if (rsync_port) {
1128                                 if (!shell_cmd) {
1129                                         return start_socket_client(shell_machine,
1130                                                                    shell_path,
1131                                                                    argc, argv);
1132                                 }
1133                                 daemon_over_rsh = 1;
1134                         }
1135                 }
1136         } else {  /* read_batch */
1137                 local_server = 1;
1138                 shell_path = argv[argc-1];
1139                 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
1140                         rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1141                         exit_cleanup(RERR_SYNTAX);
1142                 }
1143         }
1144
1145         if (shell_machine) {
1146                 p = strrchr(shell_machine,'@');
1147                 if (p) {
1148                         *p = 0;
1149                         shell_user = shell_machine;
1150                         shell_machine = p+1;
1151                 }
1152         }
1153
1154         if (verbose > 3) {
1155                 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1156                         shell_cmd ? shell_cmd : "",
1157                         shell_machine ? shell_machine : "",
1158                         shell_user ? shell_user : "",
1159                         shell_path ? shell_path : "");
1160         }
1161
1162         /* for remote source, only single dest arg can remain ... */
1163         if (!am_sender && argc > 1) {
1164                 usage(FERROR);
1165                 exit_cleanup(RERR_SYNTAX);
1166         }
1167
1168         /* ... or no dest at all */
1169         if (!am_sender && argc == 0)
1170                 list_only |= 1;
1171
1172         pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1173                      &f_in,&f_out);
1174
1175         /* if we're running an rsync server on the remote host over a
1176          * remote shell command, we need to do the RSYNCD protocol first */
1177         if (daemon_over_rsh) {
1178                 int tmpret;
1179                 tmpret = start_inband_exchange(shell_user, shell_path,
1180                                                f_in, f_out, argc);
1181                 if (tmpret < 0)
1182                         return tmpret;
1183         }
1184
1185         ret = client_run(f_in, f_out, pid, argc, argv);
1186
1187         fflush(stdout);
1188         fflush(stderr);
1189
1190         return ret;
1191 }
1192
1193
1194 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1195 {
1196         exit_cleanup(RERR_SIGNAL1);
1197 }
1198
1199 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1200 {
1201         if (!am_server)
1202                 output_summary();
1203         close_all();
1204         if (log_got_error)
1205                 _exit(RERR_PARTIAL);
1206         _exit(0);
1207 }
1208
1209 RETSIGTYPE remember_children(UNUSED(int val))
1210 {
1211 #ifdef WNOHANG
1212         int cnt, status;
1213         pid_t pid;
1214         /* An empty waitpid() loop was put here by Tridge and we could never
1215          * get him to explain why he put it in, so rather than taking it
1216          * out we're instead saving the child exit statuses for later use.
1217          * The waitpid() loop presumably eliminates all possibility of leaving
1218          * zombie children, maybe that's why he did it. */
1219         while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1220                 /* save the child's exit status */
1221                 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1222                         if (pid_stat_table[cnt].pid == 0) {
1223                                 pid_stat_table[cnt].pid = pid;
1224                                 pid_stat_table[cnt].status = status;
1225                                 break;
1226                         }
1227                 }
1228         }
1229 #endif
1230 #ifndef HAVE_SIGACTION
1231         signal(SIGCHLD, remember_children);
1232 #endif
1233 }
1234
1235
1236 /**
1237  * This routine catches signals and tries to send them to gdb.
1238  *
1239  * Because it's called from inside a signal handler it ought not to
1240  * use too many library routines.
1241  *
1242  * @todo Perhaps use "screen -X" instead/as well, to help people
1243  * debugging without easy access to X.  Perhaps use an environment
1244  * variable, or just call a script?
1245  *
1246  * @todo The /proc/ magic probably only works on Linux (and
1247  * Solaris?)  Can we be more portable?
1248  **/
1249 #ifdef MAINTAINER_MODE
1250 const char *get_panic_action(void)
1251 {
1252         const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1253
1254         if (cmd_fmt)
1255                 return cmd_fmt;
1256         else
1257                 return "xterm -display :0 -T Panic -n Panic "
1258                         "-e gdb /proc/%d/exe %d";
1259 }
1260
1261
1262 /**
1263  * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1264  *
1265  * This signal handler is only installed if we were configured with
1266  * --enable-maintainer-mode.  Perhaps it should always be on and we
1267  * should just look at the environment variable, but I'm a bit leery
1268  * of a signal sending us into a busy loop.
1269  **/
1270 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1271 {
1272         char cmd_buf[300];
1273         int ret;
1274
1275         sprintf(cmd_buf, get_panic_action(),
1276                 getpid(), getpid());
1277
1278         /* Unless we failed to execute gdb, we allow the process to
1279          * continue.  I'm not sure if that's right. */
1280         ret = system(cmd_buf);
1281         if (ret)
1282                 _exit(ret);
1283 }
1284 #endif
1285
1286
1287 int main(int argc,char *argv[])
1288 {
1289         int ret;
1290         int orig_argc = argc;
1291         char **orig_argv = argv;
1292 #ifdef HAVE_SIGACTION
1293 # ifdef HAVE_SIGPROCMASK
1294         sigset_t sigmask;
1295
1296         sigemptyset(&sigmask);
1297 # endif
1298         sigact.sa_flags = SA_NOCLDSTOP;
1299 #endif
1300         SIGACTMASK(SIGUSR1, sigusr1_handler);
1301         SIGACTMASK(SIGUSR2, sigusr2_handler);
1302         SIGACTMASK(SIGCHLD, remember_children);
1303 #ifdef MAINTAINER_MODE
1304         SIGACTMASK(SIGSEGV, rsync_panic_handler);
1305         SIGACTMASK(SIGFPE, rsync_panic_handler);
1306         SIGACTMASK(SIGABRT, rsync_panic_handler);
1307         SIGACTMASK(SIGBUS, rsync_panic_handler);
1308 #endif
1309
1310         starttime = time(NULL);
1311         am_root = (MY_UID() == 0);
1312
1313         memset(&stats, 0, sizeof(stats));
1314
1315         if (argc < 2) {
1316                 usage(FERROR);
1317                 exit_cleanup(RERR_SYNTAX);
1318         }
1319
1320         /* we set a 0 umask so that correct file permissions can be
1321          * carried across */
1322         orig_umask = umask(0);
1323
1324 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1325         setlocale(LC_CTYPE, "");
1326 #endif
1327
1328         if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1329                 /* FIXME: We ought to call the same error-handling
1330                  * code here, rather than relying on getopt. */
1331                 option_error();
1332                 exit_cleanup(RERR_SYNTAX);
1333         }
1334
1335         SIGACTMASK(SIGINT, sig_int);
1336         SIGACTMASK(SIGHUP, sig_int);
1337         SIGACTMASK(SIGTERM, sig_int);
1338 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1339         sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1340 #endif
1341
1342         /* Ignore SIGPIPE; we consistently check error codes and will
1343          * see the EPIPE. */
1344         SIGACTION(SIGPIPE, SIG_IGN);
1345 #ifdef SIGXFSZ
1346         SIGACTION(SIGXFSZ, SIG_IGN);
1347 #endif
1348
1349         /* Initialize push_dir here because on some old systems getcwd
1350          * (implemented by forking "pwd" and reading its output) doesn't
1351          * work when there are other child processes.  Also, on all systems
1352          * that implement getcwd that way "pwd" can't be found after chroot. */
1353         push_dir(NULL, 0);
1354
1355         init_flist();
1356
1357         if ((write_batch || read_batch) && !am_server) {
1358                 if (write_batch)
1359                         write_batch_shell_file(orig_argc, orig_argv, argc);
1360
1361                 if (read_batch && strcmp(batch_name, "-") == 0)
1362                         batch_fd = STDIN_FILENO;
1363                 else {
1364                         batch_fd = do_open(batch_name,
1365                                    write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1366                                    : O_RDONLY, S_IRUSR | S_IWUSR);
1367                 }
1368                 if (batch_fd < 0) {
1369                         rsyserr(FERROR, errno, "Batch file %s open error",
1370                                 full_fname(batch_name));
1371                         exit_cleanup(RERR_FILEIO);
1372                 }
1373                 if (read_batch)
1374                         read_stream_flags(batch_fd);
1375         }
1376         if (write_batch < 0)
1377                 dry_run = 1;
1378
1379         if (am_daemon && !am_server)
1380                 return daemon_main();
1381
1382         if (argc < 1) {
1383                 usage(FERROR);
1384                 exit_cleanup(RERR_SYNTAX);
1385         }
1386
1387         if (am_server) {
1388                 set_nonblocking(STDIN_FILENO);
1389                 set_nonblocking(STDOUT_FILENO);
1390                 if (am_daemon)
1391                         return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1392                 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1393         }
1394
1395         ret = start_client(argc, argv);
1396         if (ret == -1)
1397                 exit_cleanup(RERR_STARTCLIENT);
1398         else
1399                 exit_cleanup(ret);
1400
1401         return ret;
1402 }