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 and return
 459  * either a NULL for mode 1, or the local-name for mode 2.  We also
 460  * change directory if there are any path components in dest_path. */
 461 static char *get_local_name(struct file_list *flist, char *dest_path)
 462 {
 463         STRUCT_STAT st;
 464         char *cp;
 465
 466         if (verbose > 2) {
 467                 rprintf(FINFO, "get_local_name count=%d %s\n",
 468                         flist->count, NS(dest_path));
 469         }
 470
 471         if (!dest_path || list_only)
 472                 return NULL;
 473
 474         /* If the destination path refers to an existing directory, enter
 475          * it and use mode 1.  If there is something other than a directory
 476          * at the destination path, we must be transferring one file
 477          * (anything at the destination will be overwritten). */
 478         if (safe_stat(dest_path, &st) == 0) {
 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                 rsyserr(FERROR, errno, "cannot stat destination %s",
 506                         full_fname(dest_path));
 507                 exit_cleanup(RERR_FILESELECT);
 508         }
 509
 510         cp = strrchr(dest_path, '/');
 511
 512         /* If the destination path ends in a slash or we are transferring
 513          * multiple files, create a directory at the destination path,
 514          * enter the new directory, and use mode 1. */
 515         if (flist->count > 1 || (cp && !cp[1])) {
 516                 /* Lop off the final slash (if any). */
 517                 if (cp && !cp[1])
 518                         *cp = '\0';
 519
 520                 if (mkdir_defmode(dest_path) != 0) {
 521                         rsyserr(FERROR, errno, "mkdir %s failed",
 522                                 full_fname(dest_path));
 523                         exit_cleanup(RERR_FILEIO);
 524                 }
 525
 526                 if (verbose)
 527                         rprintf(FINFO, "created directory %s\n", dest_path);
 528
 529                 if (dry_run) {
 530                         /* Indicate that the destination directory doesn't
 531                          * really exist and return mode 1. */
 532                         dry_run++;
 533                         return NULL;
 534                 }
 535
 536                 if (sanitize_paths)
 537                         die_on_unsafe_path(dest_path, 0);
 538                 if (!push_dir(dest_path)) {
 539                         rsyserr(FERROR, errno, "push_dir#2 %s failed",
 540                                 full_fname(dest_path));
 541                         exit_cleanup(RERR_FILESELECT);
 542                 }
 543
 544                 return NULL;
 545         }
 546
 547         /* Otherwise, we are writing a single file, possibly on top of an
 548          * existing non-directory.  Change to the item's parent directory
 549          * (if it has a path component), return the basename of the
 550          * destination file as the local name, and use mode 2. */
 551         if (!cp)
 552                 return dest_path;
 553
 554         if (cp == dest_path)
 555                 dest_path = "/";
 556
 557         *cp = '\0';
 558         if (sanitize_paths)
 559                 die_on_unsafe_path(dest_path, 0);
 560         if (!push_dir(dest_path)) {
 561                 rsyserr(FERROR, errno, "push_dir#3 %s failed",
 562                         full_fname(dest_path));
 563                 exit_cleanup(RERR_FILESELECT);
 564         }
 565         *cp = '/';
 566
 567         return cp + 1;
 568 }
 569
 570
 571 /* This is only called by the sender. */
 572 static void read_final_goodbye(int f_in, int f_out)
 573 {
 574         int i;
 575
 576         if (protocol_version < 29)
 577                 i = read_int(f_in);
 578         else {
 579                 while ((i = read_int(f_in)) == the_file_list->count
 580                     && read_shortint(f_in) == ITEM_IS_NEW) {
 581                         /* Forward the keep-alive (no-op) to the receiver. */
 582                         write_int(f_out, the_file_list->count);
 583                         write_shortint(f_out, ITEM_IS_NEW);
 584                 }
 585         }
 586
 587         if (i != -1) {
 588                 rprintf(FERROR, "Invalid packet at end of run (%d) [%s]\n",
 589                         i, who_am_i());
 590                 exit_cleanup(RERR_PROTOCOL);
 591         }
 592 }
 593
 594
 595 static void do_server_sender(int f_in, int f_out, int argc, char *argv[])
 596 {
 597         struct file_list *flist;
 598         char *dir = argv[0];
 599
 600         if (verbose > 2) {
 601                 rprintf(FINFO, "server_sender starting pid=%ld\n",
 602                         (long)getpid());
 603         }
 604
 605         if (am_daemon && lp_write_only(module_id)) {
 606                 rprintf(FERROR, "ERROR: module is write only\n");
 607                 exit_cleanup(RERR_SYNTAX);
 608                 return;
 609         }
 610         if (am_daemon && lp_read_only(module_id) && remove_sent_files) {
 611                 rprintf(FERROR,
 612                     "ERROR: --remove-sent-files cannot be used with a read-only module\n");
 613                 exit_cleanup(RERR_SYNTAX);
 614                 return;
 615         }
 616
 617         if (!relative_paths) {
 618                 if (sanitize_paths)
 619                         die_on_unsafe_path(dir, 0);
 620                 if (!push_dir(dir)) {
 621                         rsyserr(FERROR, errno, "push_dir#3 %s failed",
 622                                 full_fname(dir));
 623                         exit_cleanup(RERR_FILESELECT);
 624                 }
 625         }
 626         argc--;
 627         argv++;
 628
 629         if (argc == 0 && (recurse || list_only)) {
 630                 argc = 1;
 631                 argv--;
 632                 argv[0] = ".";
 633         }
 634
 635         flist = send_file_list(f_out,argc,argv);
 636         if (!flist || flist->count == 0) {
 637                 exit_cleanup(0);
 638         }
 639         the_file_list = flist;
 640
 641         io_start_buffering_in();
 642         io_start_buffering_out();
 643
 644         send_files(flist,f_out,f_in);
 645         io_flush(FULL_FLUSH);
 646         handle_stats(f_out);
 647         if (protocol_version >= 24)
 648                 read_final_goodbye(f_in, f_out);
 649         io_flush(FULL_FLUSH);
 650         exit_cleanup(0);
 651 }
 652
 653
 654 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
 655 {
 656         int pid;
 657         int exit_code = 0;
 658         int error_pipe[2];
 659
 660         /* The receiving side mustn't obey this, or an existing symlink that
 661          * points to an identical file won't be replaced by the referent. */
 662         copy_links = copy_dirlinks = 0;
 663
 664         if (preserve_hard_links)
 665                 init_hard_links();
 666
 667         if (fd_pair(error_pipe) < 0) {
 668                 rsyserr(FERROR, errno, "pipe failed in do_recv");
 669                 exit_cleanup(RERR_IPC);
 670         }
 671
 672         io_flush(NORMAL_FLUSH);
 673
 674         if ((pid = do_fork()) == -1) {
 675                 rsyserr(FERROR, errno, "fork failed in do_recv");
 676                 exit_cleanup(RERR_IPC);
 677         }
 678
 679         if (pid == 0) {
 680                 close(error_pipe[0]);
 681                 if (f_in != f_out)
 682                         close(f_out);
 683
 684                 /* we can't let two processes write to the socket at one time */
 685                 close_multiplexing_out();
 686
 687                 /* set place to send errors */
 688                 set_msg_fd_out(error_pipe[1]);
 689
 690                 recv_files(f_in, flist, local_name);
 691                 io_flush(FULL_FLUSH);
 692                 handle_stats(f_in);
 693
 694                 send_msg(MSG_DONE, "", 0);
 695                 io_flush(FULL_FLUSH);
 696
 697                 /* Handle any keep-alive packets from the post-processing work
 698                  * that the generator does. */
 699                 if (protocol_version >= 29) {
 700                         kluge_around_eof = -1;
 701
 702                         /* This should only get stopped via a USR2 signal. */
 703                         while (read_int(f_in) == flist->count
 704                             && read_shortint(f_in) == ITEM_IS_NEW) {}
 705
 706                         rprintf(FERROR, "Invalid packet at end of run [%s]\n",
 707                                 who_am_i());
 708                         exit_cleanup(RERR_PROTOCOL);
 709                 }
 710
 711                 /* Finally, we go to sleep until our parent kills us with a
 712                  * USR2 signal.  We sleep for a short time, as on some OSes
 713                  * a signal won't interrupt a sleep! */
 714                 while (1)
 715                         msleep(20);
 716         }
 717
 718         am_generator = 1;
 719         close_multiplexing_in();
 720         if (write_batch && !am_server)
 721                 stop_write_batch();
 722
 723         close(error_pipe[1]);
 724         if (f_in != f_out)
 725                 close(f_in);
 726
 727         io_start_buffering_out();
 728
 729         set_msg_fd_in(error_pipe[0]);
 730
 731         generate_files(f_out, flist, local_name);
 732
 733         handle_stats(-1);
 734         io_flush(FULL_FLUSH);
 735         if (protocol_version >= 24) {
 736                 /* send a final goodbye message */
 737                 write_int(f_out, -1);
 738         }
 739         io_flush(FULL_FLUSH);
 740
 741         set_msg_fd_in(-1);
 742         kill(pid, SIGUSR2);
 743         wait_process_with_flush(pid, &exit_code);
 744         return exit_code;
 745 }
 746
 747
 748 static void do_server_recv(int f_in, int f_out, int argc,char *argv[])
 749 {
 750         int exit_code;
 751         struct file_list *flist;
 752         char *local_name = NULL;
 753         char *dir = NULL;
 754         int save_verbose = verbose;
 755
 756         if (filesfrom_fd >= 0) {
 757                 /* We can't mix messages with files-from data on the socket,
 758                  * so temporarily turn off verbose messages. */
 759                 verbose = 0;
 760         }
 761
 762         if (verbose > 2) {
 763                 rprintf(FINFO, "server_recv(%d) starting pid=%ld\n",
 764                         argc, (long)getpid());
 765         }
 766
 767         if (am_daemon && lp_read_only(module_id)) {
 768                 rprintf(FERROR,"ERROR: module is read only\n");
 769                 exit_cleanup(RERR_SYNTAX);
 770                 return;
 771         }
 772
 773         if (argc > 0) {
 774                 dir = argv[0];
 775                 argc--;
 776                 argv++;
 777                 if (!am_daemon && !push_dir(dir)) {
 778                         rsyserr(FERROR, errno, "push_dir#4 %s failed",
 779                                 full_fname(dir));
 780                         exit_cleanup(RERR_FILESELECT);
 781                 }
 782         }
 783
 784         io_start_buffering_in();
 785         recv_filter_list(f_in);
 786
 787         if (filesfrom_fd >= 0) {
 788                 /* We need to send the files-from names to the sender at the
 789                  * same time that we receive the file-list from them, so we
 790                  * need the IO routines to automatically write out the names
 791                  * onto our f_out socket as we read the file-list.  This
 792                  * avoids both deadlock and extra delays/buffers. */
 793                 io_set_filesfrom_fds(filesfrom_fd, f_out);
 794                 filesfrom_fd = -1;
 795         }
 796
 797         flist = recv_file_list(f_in);
 798         verbose = save_verbose;
 799         if (!flist) {
 800                 rprintf(FERROR,"server_recv: recv_file_list error\n");
 801                 exit_cleanup(RERR_FILESELECT);
 802         }
 803         the_file_list = flist;
 804
 805         if (argc > 0)
 806                 local_name = get_local_name(flist,argv[0]);
 807
 808         /* Now that we know what our destination directory turned out to be,
 809          * we can sanitize the --link-/copy-/compare-dest args correctly. */
 810         if (sanitize_paths) {
 811                 char **dir;
 812                 for (dir = basis_dir; *dir; dir++) {
 813                         *dir = sanitize_path(NULL, *dir, NULL, curr_dir_depth, NULL);
 814                         die_on_unsafe_path(*dir, 0);
 815                 }
 816                 if (partial_dir) {
 817                         partial_dir = sanitize_path(NULL, partial_dir, NULL, curr_dir_depth, NULL);
 818                         /* A relative path gets this checked at every dir change. */
 819                         if (*partial_dir == '/')
 820                                 die_on_unsafe_path(partial_dir, 0);
 821                 }
 822         }
 823         if (server_filter_list.head) {
 824                 char **dir;
 825                 struct filter_list_struct *elp = &server_filter_list;
 826
 827                 for (dir = basis_dir; *dir; dir++) {
 828                         if (check_filter(elp, *dir, 1) < 0)
 829                                 goto options_rejected;
 830                 }
 831                 if (partial_dir && *partial_dir == '/'
 832                  && check_filter(elp, partial_dir, 1) < 0) {
 833                     options_rejected:
 834                         rprintf(FERROR,
 835                                 "Your options have been rejected by the server.\n");
 836                         exit_cleanup(RERR_SYNTAX);
 837                 }
 838         }
 839
 840         exit_code = do_recv(f_in,f_out,flist,local_name);
 841         exit_cleanup(exit_code);
 842 }
 843
 844
 845 int child_main(int argc, char *argv[])
 846 {
 847         start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
 848         return 0;
 849 }
 850
 851
 852 void start_server(int f_in, int f_out, int argc, char *argv[])
 853 {
 854         set_nonblocking(f_in);
 855         set_nonblocking(f_out);
 856
 857         io_set_sock_fds(f_in, f_out);
 858         setup_protocol(f_out, f_in);
 859 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
 860         setup_iconv();
 861 #endif
 862
 863         if (protocol_version >= 23)
 864                 io_start_multiplex_out();
 865
 866         if (am_sender) {
 867                 keep_dirlinks = 0; /* Must be disabled on the sender. */
 868                 if (need_messages_from_generator)
 869                         io_start_multiplex_in();
 870
 871                 recv_filter_list(f_in);
 872                 do_server_sender(f_in, f_out, argc, argv);
 873         } else {
 874                 do_server_recv(f_in, f_out, argc, argv);
 875         }
 876         exit_cleanup(0);
 877 }
 878
 879
 880 /*
 881  * This is called once the connection has been negotiated.  It is used
 882  * for rsyncd, remote-shell, and local connections.
 883  */
 884 int client_run(int f_in, int f_out, pid_t pid, int argc, char *argv[])
 885 {
 886         struct file_list *flist = NULL;
 887         int exit_code = 0, exit_code2 = 0;
 888         char *local_name = NULL;
 889
 890         cleanup_child_pid = pid;
 891         if (!read_batch) {
 892                 set_nonblocking(f_in);
 893                 set_nonblocking(f_out);
 894         }
 895
 896         io_set_sock_fds(f_in, f_out);
 897         setup_protocol(f_out,f_in);
 898 #if defined HAVE_ICONV_OPEN && defined HAVE_ICONV_H
 899         setup_iconv();
 900 #endif
 901
 902         if (protocol_version >= 23 && !read_batch)
 903                 io_start_multiplex_in();
 904
 905         /* We set our stderr file handle to blocking because ssh might have
 906          * set it to non-blocking.  This can be particularly troublesome if
 907          * stderr is a clone of stdout, because ssh would have set our stdout
 908          * to non-blocking at the same time (which can easily cause us to lose
 909          * output from our print statements).  This kluge shouldn't cause ssh
 910          * any problems for how we use it.  Note also that we delayed setting
 911          * this until after the above protocol setup so that we know for sure
 912          * that ssh is done twiddling its file descriptors.  */
 913         set_blocking(STDERR_FILENO);
 914
 915         if (am_sender) {
 916                 keep_dirlinks = 0; /* Must be disabled on the sender. */
 917                 io_start_buffering_out();
 918                 if (!filesfrom_host)
 919                         set_msg_fd_in(f_in);
 920                 send_filter_list(f_out);
 921                 if (filesfrom_host)
 922                         filesfrom_fd = f_in;
 923
 924                 if (write_batch && !am_server)
 925                         start_write_batch(f_out);
 926                 flist = send_file_list(f_out, argc, argv);
 927                 set_msg_fd_in(-1);
 928                 if (verbose > 3)
 929                         rprintf(FINFO,"file list sent\n");
 930                 the_file_list = flist;
 931
 932                 io_flush(NORMAL_FLUSH);
 933                 send_files(flist,f_out,f_in);
 934                 io_flush(FULL_FLUSH);
 935                 handle_stats(-1);
 936                 if (protocol_version >= 24)
 937                         read_final_goodbye(f_in, f_out);
 938                 if (pid != -1) {
 939                         if (verbose > 3)
 940                                 rprintf(FINFO,"client_run waiting on %d\n", (int) pid);
 941                         io_flush(FULL_FLUSH);
 942                         wait_process_with_flush(pid, &exit_code);
 943                 }
 944                 output_summary();
 945                 io_flush(FULL_FLUSH);
 946                 exit_cleanup(exit_code);
 947         }
 948
 949         if (need_messages_from_generator && !read_batch)
 950                 io_start_multiplex_out();
 951
 952         if (argc == 0)
 953                 list_only |= 1;
 954
 955         send_filter_list(read_batch ? -1 : f_out);
 956
 957         if (filesfrom_fd >= 0) {
 958                 io_set_filesfrom_fds(filesfrom_fd, f_out);
 959                 filesfrom_fd = -1;
 960         }
 961
 962         if (write_batch && !am_server)
 963                 start_write_batch(f_in);
 964         flist = recv_file_list(f_in);
 965         the_file_list = flist;
 966
 967         if (flist && flist->count > 0) {
 968                 local_name = get_local_name(flist, argv[0]);
 969
 970                 exit_code2 = do_recv(f_in, f_out, flist, local_name);
 971         } else {
 972                 handle_stats(-1);
 973                 output_summary();
 974         }
 975
 976         if (pid != -1) {
 977                 if (verbose > 3)
 978                         rprintf(FINFO,"client_run2 waiting on %d\n", (int) pid);
 979                 io_flush(FULL_FLUSH);
 980                 wait_process_with_flush(pid, &exit_code);
 981         }
 982
 983         return MAX(exit_code, exit_code2);
 984 }
 985
 986 static int copy_argv (char *argv[])
 987 {
 988         int i;
 989
 990         for (i = 0; argv[i]; i++) {
 991                 if (!(argv[i] = strdup(argv[i]))) {
 992                         rprintf (FERROR, "out of memory at %s(%d)\n",
 993                                  __FILE__, __LINE__);
 994                         return RERR_MALLOC;
 995                 }
 996         }
 997
 998         return 0;
 999 }
1000
1001
1002 /**
1003  * Start a client for either type of remote connection.  Work out
1004  * whether the arguments request a remote shell or rsyncd connection,
1005  * and call the appropriate connection function, then run_client.
1006  *
1007  * Calls either start_socket_client (for sockets) or do_cmd and
1008  * client_run (for ssh).
1009  **/
1010 static int start_client(int argc, char *argv[])
1011 {
1012         char *p;
1013         char *shell_machine = NULL;
1014         char *shell_path = NULL;
1015         char *shell_user = NULL;
1016         int ret;
1017         pid_t pid;
1018         int f_in,f_out;
1019         int rc;
1020
1021         /* Don't clobber argv[] so that ps(1) can still show the right
1022          * command line. */
1023         if ((rc = copy_argv(argv)))
1024                 return rc;
1025
1026         if (!read_batch) { /* for read_batch, NO source is specified */
1027                 shell_path = check_for_hostspec(argv[0], &shell_machine, &rsync_port);
1028                 if (shell_path) { /* source is remote */
1029                         char *dummy1;
1030                         int dummy2;
1031                         if (--argc
1032                          && check_for_hostspec(argv[argc], &dummy1, &dummy2)) {
1033                                 rprintf(FERROR,
1034                                         "The source and destination cannot both be remote.\n");
1035                                 exit_cleanup(RERR_SYNTAX);
1036                         }
1037                         argv++;
1038                         if (filesfrom_host && *filesfrom_host
1039                             && strcmp(filesfrom_host, shell_machine) != 0) {
1040                                 rprintf(FERROR,
1041                                         "--files-from hostname is not the same as the transfer hostname\n");
1042                                 exit_cleanup(RERR_SYNTAX);
1043                         }
1044                         if (rsync_port) {
1045                                 if (!shell_cmd) {
1046                                         return start_socket_client(shell_machine,
1047                                                                    shell_path,
1048                                                                    argc, argv);
1049                                 }
1050                                 daemon_over_rsh = 1;
1051                         }
1052
1053                         am_sender = 0;
1054                 } else { /* source is local, check dest arg */
1055                         am_sender = 1;
1056
1057                         if (argc > 1)
1058                                 p = argv[--argc];
1059                         else {
1060                                 p = ".";
1061                                 list_only = 1;
1062                         }
1063
1064                         shell_path = check_for_hostspec(p, &shell_machine, &rsync_port);
1065                         if (shell_path && filesfrom_host && *filesfrom_host
1066                             && strcmp(filesfrom_host, shell_machine) != 0) {
1067                                 rprintf(FERROR,
1068                                         "--files-from hostname is not the same as the transfer hostname\n");
1069                                 exit_cleanup(RERR_SYNTAX);
1070                         }
1071                         if (!shell_path) { /* no hostspec found, so src & dest are local */
1072                                 local_server = 1;
1073                                 if (filesfrom_host) {
1074                                         rprintf(FERROR,
1075                                                 "--files-from cannot be remote when the transfer is local\n");
1076                                         exit_cleanup(RERR_SYNTAX);
1077                                 }
1078                                 shell_machine = NULL;
1079                                 shell_path = p;
1080                         } else if (rsync_port) {
1081                                 if (!shell_cmd) {
1082                                         return start_socket_client(shell_machine,
1083                                                                    shell_path,
1084                                                                    argc, argv);
1085                                 }
1086                                 daemon_over_rsh = 1;
1087                         }
1088                 }
1089         } else {  /* read_batch */
1090                 local_server = 1;
1091                 shell_path = argv[argc-1];
1092                 if (check_for_hostspec(shell_path, &shell_machine, &rsync_port)) {
1093                         rprintf(FERROR, "remote destination is not allowed with --read-batch\n");
1094                         exit_cleanup(RERR_SYNTAX);
1095                 }
1096         }
1097
1098         if (shell_machine) {
1099                 p = strrchr(shell_machine,'@');
1100                 if (p) {
1101                         *p = 0;
1102                         shell_user = shell_machine;
1103                         shell_machine = p+1;
1104                 }
1105         }
1106
1107         if (verbose > 3) {
1108                 rprintf(FINFO,"cmd=%s machine=%s user=%s path=%s\n",
1109                         shell_cmd ? shell_cmd : "",
1110                         shell_machine ? shell_machine : "",
1111                         shell_user ? shell_user : "",
1112                         shell_path ? shell_path : "");
1113         }
1114
1115         /* for remote source, only single dest arg can remain ... */
1116         if (!am_sender && argc > 1) {
1117                 usage(FERROR);
1118                 exit_cleanup(RERR_SYNTAX);
1119         }
1120
1121         /* ... or no dest at all */
1122         if (!am_sender && argc == 0)
1123                 list_only |= 1;
1124
1125         pid = do_cmd(shell_cmd,shell_machine,shell_user,shell_path,
1126                      &f_in,&f_out);
1127
1128         /* if we're running an rsync server on the remote host over a
1129          * remote shell command, we need to do the RSYNCD protocol first */
1130         if (daemon_over_rsh) {
1131                 int tmpret;
1132                 tmpret = start_inband_exchange(shell_user, shell_path,
1133                                                f_in, f_out, argc);
1134                 if (tmpret < 0)
1135                         return tmpret;
1136         }
1137
1138         ret = client_run(f_in, f_out, pid, argc, argv);
1139
1140         fflush(stdout);
1141         fflush(stderr);
1142
1143         return ret;
1144 }
1145
1146
1147 static RETSIGTYPE sigusr1_handler(UNUSED(int val))
1148 {
1149         exit_cleanup(RERR_SIGNAL1);
1150 }
1151
1152 static RETSIGTYPE sigusr2_handler(UNUSED(int val))
1153 {
1154         if (!am_server)
1155                 output_summary();
1156         close_all();
1157         if (log_got_error)
1158                 _exit(RERR_PARTIAL);
1159         _exit(0);
1160 }
1161
1162 RETSIGTYPE remember_children(UNUSED(int val))
1163 {
1164 #ifdef WNOHANG
1165         int cnt, status;
1166         pid_t pid;
1167         /* An empty waitpid() loop was put here by Tridge and we could never
1168          * get him to explain why he put it in, so rather than taking it
1169          * out we're instead saving the child exit statuses for later use.
1170          * The waitpid() loop presumably eliminates all possibility of leaving
1171          * zombie children, maybe that's why he did it. */
1172         while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
1173                 /* save the child's exit status */
1174                 for (cnt = 0; cnt < MAXCHILDPROCS; cnt++) {
1175                         if (pid_stat_table[cnt].pid == 0) {
1176                                 pid_stat_table[cnt].pid = pid;
1177                                 pid_stat_table[cnt].status = status;
1178                                 break;
1179                         }
1180                 }
1181         }
1182 #endif
1183 #ifndef HAVE_SIGACTION
1184         signal(SIGCHLD, remember_children);
1185 #endif
1186 }
1187
1188
1189 /**
1190  * This routine catches signals and tries to send them to gdb.
1191  *
1192  * Because it's called from inside a signal handler it ought not to
1193  * use too many library routines.
1194  *
1195  * @todo Perhaps use "screen -X" instead/as well, to help people
1196  * debugging without easy access to X.  Perhaps use an environment
1197  * variable, or just call a script?
1198  *
1199  * @todo The /proc/ magic probably only works on Linux (and
1200  * Solaris?)  Can we be more portable?
1201  **/
1202 #ifdef MAINTAINER_MODE
1203 const char *get_panic_action(void)
1204 {
1205         const char *cmd_fmt = getenv("RSYNC_PANIC_ACTION");
1206
1207         if (cmd_fmt)
1208                 return cmd_fmt;
1209         else
1210                 return "xterm -display :0 -T Panic -n Panic "
1211                         "-e gdb /proc/%d/exe %d";
1212 }
1213
1214
1215 /**
1216  * Handle a fatal signal by launching a debugger, controlled by $RSYNC_PANIC_ACTION.
1217  *
1218  * This signal handler is only installed if we were configured with
1219  * --enable-maintainer-mode.  Perhaps it should always be on and we
1220  * should just look at the environment variable, but I'm a bit leery
1221  * of a signal sending us into a busy loop.
1222  **/
1223 static RETSIGTYPE rsync_panic_handler(UNUSED(int whatsig))
1224 {
1225         char cmd_buf[300];
1226         int ret;
1227
1228         sprintf(cmd_buf, get_panic_action(),
1229                 getpid(), getpid());
1230
1231         /* Unless we failed to execute gdb, we allow the process to
1232          * continue.  I'm not sure if that's right. */
1233         ret = system(cmd_buf);
1234         if (ret)
1235                 _exit(ret);
1236 }
1237 #endif
1238
1239
1240 int main(int argc,char *argv[])
1241 {
1242         int ret;
1243         int orig_argc = argc;
1244         char **orig_argv = argv;
1245 #ifdef HAVE_SIGACTION
1246 # ifdef HAVE_SIGPROCMASK
1247         sigset_t sigmask;
1248
1249         sigemptyset(&sigmask);
1250 # endif
1251         sigact.sa_flags = SA_NOCLDSTOP;
1252 #endif
1253         SIGACTMASK(SIGUSR1, sigusr1_handler);
1254         SIGACTMASK(SIGUSR2, sigusr2_handler);
1255         SIGACTMASK(SIGCHLD, remember_children);
1256 #ifdef MAINTAINER_MODE
1257         SIGACTMASK(SIGSEGV, rsync_panic_handler);
1258         SIGACTMASK(SIGFPE, rsync_panic_handler);
1259         SIGACTMASK(SIGABRT, rsync_panic_handler);
1260         SIGACTMASK(SIGBUS, rsync_panic_handler);
1261 #endif
1262
1263         starttime = time(NULL);
1264         am_root = (MY_UID() == 0);
1265
1266         memset(&stats, 0, sizeof(stats));
1267
1268         if (argc < 2) {
1269                 usage(FERROR);
1270                 exit_cleanup(RERR_SYNTAX);
1271         }
1272
1273         /* we set a 0 umask so that correct file permissions can be
1274          * carried across */
1275         orig_umask = umask(0);
1276
1277 #if defined CONFIG_LOCALE && defined HAVE_SETLOCALE
1278         setlocale(LC_CTYPE, "");
1279 #endif
1280
1281         if (!parse_arguments(&argc, (const char ***) &argv, 1)) {
1282                 /* FIXME: We ought to call the same error-handling
1283                  * code here, rather than relying on getopt. */
1284                 option_error();
1285                 exit_cleanup(RERR_SYNTAX);
1286         }
1287
1288         SIGACTMASK(SIGINT, sig_int);
1289         SIGACTMASK(SIGHUP, sig_int);
1290         SIGACTMASK(SIGTERM, sig_int);
1291 #if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
1292         sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
1293 #endif
1294
1295         /* Ignore SIGPIPE; we consistently check error codes and will
1296          * see the EPIPE. */
1297         SIGACTION(SIGPIPE, SIG_IGN);
1298 #ifdef SIGXFSZ
1299         SIGACTION(SIGXFSZ, SIG_IGN);
1300 #endif
1301
1302         /* Initialize push_dir here because on some old systems getcwd
1303          * (implemented by forking "pwd" and reading its output) doesn't
1304          * work when there are other child processes.  Also, on all systems
1305          * that implement getcwd that way "pwd" can't be found after chroot. */
1306         push_dir(NULL);
1307
1308         init_flist();
1309
1310         if ((write_batch || read_batch) && !am_server) {
1311                 if (write_batch)
1312                         write_batch_shell_file(orig_argc, orig_argv, argc);
1313
1314                 if (read_batch && strcmp(batch_name, "-") == 0)
1315                         batch_fd = STDIN_FILENO;
1316                 else {
1317                         batch_fd = do_open(batch_name,
1318                                    write_batch ? O_WRONLY | O_CREAT | O_TRUNC
1319                                    : O_RDONLY, S_IRUSR | S_IWUSR);
1320                 }
1321                 if (batch_fd < 0) {
1322                         rsyserr(FERROR, errno, "Batch file %s open error",
1323                                 full_fname(batch_name));
1324                         exit_cleanup(RERR_FILEIO);
1325                 }
1326                 if (read_batch)
1327                         read_stream_flags(batch_fd);
1328         }
1329         if (write_batch < 0)
1330                 dry_run = 1;
1331
1332         if (am_daemon && !am_server)
1333                 return daemon_main();
1334
1335         if (argc < 1) {
1336                 usage(FERROR);
1337                 exit_cleanup(RERR_SYNTAX);
1338         }
1339
1340         if (am_server) {
1341                 set_nonblocking(STDIN_FILENO);
1342                 set_nonblocking(STDOUT_FILENO);
1343                 if (am_daemon)
1344                         return start_daemon(STDIN_FILENO, STDOUT_FILENO);
1345                 start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
1346         }
1347
1348         ret = start_client(argc, argv);
1349         if (ret == -1)
1350                 exit_cleanup(RERR_STARTCLIENT);
1351         else
1352                 exit_cleanup(ret);
1353
1354         return ret;
1355 }