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