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