client.c

   1 /*
   2  * Copyright (C) 1997 Andre Noll <maan@tuebingen.mpg.de>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file client.c The client program used to connect to para_server. */
   8
   9 #include <regex.h>
  10 #include <signal.h>
  11 #include <lopsub.h>
  12
  13 #include "client.lsg.h"
  14 #include "para.h"
  15 #include "list.h"
  16 #include "sched.h"
  17 #include "crypt.h"
  18 #include "string.h"
  19 #include "stdin.h"
  20 #include "stdout.h"
  21 #include "client.h"
  22 #include "buffer_tree.h"
  23 #include "error.h"
  24 #include "version.h"
  25
  26 /** Array of error strings. */
  27 DEFINE_PARA_ERRLIST;
  28
  29 static struct sched sched;
  30 static struct client_task *ct;
  31 static struct stdin_task sit;
  32 static struct stdout_task sot;
  33
  34 static int client_loglevel = LL_ERROR;
  35 DEFINE_STDERR_LOGGER(stderr_log, client_loglevel);
  36 __printf_2_3 void (*para_log)(int, const char*, ...) = stderr_log;
  37
  38 #ifdef HAVE_READLINE
  39 #include "interactive.h"
  40 #include "server_cmd.lsg.h"
  41
  42 struct exec_task {
  43         struct task *task;
  44         struct btr_node *btrn;
  45         char *result_buf;
  46         size_t result_size;
  47 };
  48
  49 static void exec_pre_select(struct sched *s, void *context)
  50 {
  51         struct exec_task *et = context;
  52         int ret = btr_node_status(et->btrn, 0, BTR_NT_LEAF);
  53
  54         if (ret != 0)
  55                 sched_min_delay(s);
  56 }
  57
  58 static int exec_post_select(__a_unused struct sched *s, void *context)
  59 {
  60         struct exec_task *et = context;
  61         struct btr_node *btrn = et->btrn;
  62         char *buf;
  63         size_t sz;
  64         int ret;
  65
  66         ret = btr_node_status(btrn, 0, BTR_NT_LEAF);
  67         if (ret <= 0)
  68                 return ret;
  69         sz = btr_next_buffer(btrn, &buf);
  70         if (sz <= 1)
  71                 goto out;
  72         et->result_buf = para_realloc(et->result_buf, et->result_size + sz - 1);
  73         memcpy(et->result_buf + et->result_size - 1, buf, sz -  1);
  74         et->result_size += sz - 1;
  75         et->result_buf[et->result_size - 1] = '\0';
  76 out:
  77         btr_consume(btrn, sz);
  78         return 0;
  79 }
  80
  81 /* Called from the line handler and the completers. This overwrites ct->lpr. */
  82 static int create_merged_lpr(const char *line)
  83 {
  84         const struct lls_command *cmd = CLIENT_CMD_PTR;
  85         int argc, ret;
  86         char *cmdline, **argv, *errctx;
  87         struct lls_parse_result *argv_lpr;
  88         static struct lls_parse_result *orig_lpr;
  89
  90         if (!orig_lpr)
  91                 orig_lpr = ct->lpr;
  92         ct->lpr = NULL;
  93         cmdline = make_message("-- %s", line);
  94         ret = create_shifted_argv(cmdline, " ", &argv);
  95         free(cmdline);
  96         if (ret < 0)
  97                 return ret;
  98         argc = ret;
  99         if (argc == 2) { /* no words (only blanks in line) */
 100                 free_argv(argv);
 101                 return 0;
 102         }
 103         argv[0] = para_strdup("--");
 104         /*
 105          * The original lpr for the interactive session has no non-option
 106          * arguments. We create a fresh lpr from the words in "line" and merge
 107          * it with the orignal lpr.
 108          */
 109         ret = lls(lls_parse(argc, argv, cmd, &argv_lpr, &errctx));
 110         free_argv(argv);
 111         if (ret < 0)
 112                 goto fail;
 113         ret = lls(lls_merge(orig_lpr, argv_lpr, cmd, &ct->lpr, &errctx));
 114         lls_free_parse_result(argv_lpr, cmd);
 115         if (ret < 0)
 116                 goto fail;
 117         return 1;
 118 fail:
 119         if (errctx)
 120                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 121         free(errctx);
 122         assert(ret < 0);
 123         return ret;
 124 }
 125
 126 /* called from completers */
 127 static int execute_client_command(const char *cmd, char **result)
 128 {
 129         int ret;
 130         struct sched command_sched = {.default_timeout = {.tv_sec = 1}};
 131         struct exec_task exec_task = {
 132                 .result_buf = para_strdup(""),
 133                 .result_size = 1,
 134         };
 135         struct lls_parse_result *old_lpr = ct->lpr;
 136
 137         *result = NULL;
 138         ret = create_merged_lpr(cmd);
 139         if (ret <= 0)
 140                 goto out;
 141         exec_task.btrn = btr_new_node(&(struct btr_node_description)
 142                 EMBRACE(.name = "exec_collect"));
 143         exec_task.task = task_register(&(struct task_info) {
 144                 .name = "client exec",
 145                 .pre_select = exec_pre_select,
 146                 .post_select = exec_post_select,
 147                 .context = &exec_task,
 148         }, &command_sched);
 149         ret = client_connect(ct, &command_sched, NULL, exec_task.btrn);
 150         if (ret < 0)
 151                 goto out;
 152         schedule(&command_sched);
 153         sched_shutdown(&command_sched);
 154         lls_free_parse_result(ct->lpr, CLIENT_CMD_PTR);
 155         ct->lpr = old_lpr;
 156         *result = exec_task.result_buf;
 157         btr_remove_node(&exec_task.btrn);
 158         ret = 1;
 159 out:
 160         btr_remove_node(&exec_task.btrn);
 161         if (ret < 0)
 162                 free(exec_task.result_buf);
 163         return ret;
 164 }
 165
 166 static int extract_matches_from_command(const char *word, char *cmd,
 167                 char ***matches)
 168 {
 169         char *buf, **sl;
 170         int ret;
 171
 172         ret = execute_client_command(cmd, &buf);
 173         if (ret < 0)
 174                 return ret;
 175         ret = create_argv(buf, "\n", &sl);
 176         free(buf);
 177         if (ret < 0)
 178                 return ret;
 179         ret = i9e_extract_completions(word, sl, matches);
 180         free_argv(sl);
 181         return ret;
 182 }
 183
 184 static int complete_attributes(const char *word, char ***matches)
 185 {
 186         return extract_matches_from_command(word, "lsatt", matches);
 187 }
 188
 189 static void complete_addblob(__a_unused const char *blob_type,
 190                 __a_unused struct i9e_completion_info *ci,
 191                 __a_unused struct i9e_completion_result *cr)
 192 {
 193         cr->filename_completion_desired = true;
 194 }
 195
 196 static void generic_blob_complete(const char *blob_type,
 197                 struct i9e_completion_info *ci,
 198                 struct i9e_completion_result *cr)
 199 {
 200         char cmd[20];
 201         sprintf(cmd, "ls%s", blob_type);
 202         extract_matches_from_command(ci->word, cmd, &cr->matches);
 203 }
 204
 205 static void complete_catblob(const char *blob_type,
 206                 struct i9e_completion_info *ci,
 207                 struct i9e_completion_result *cr)
 208 {
 209         generic_blob_complete(blob_type, ci, cr);
 210 }
 211
 212 static void complete_lsblob(const char *blob_type,
 213                 struct i9e_completion_info *ci,
 214                 struct i9e_completion_result *cr)
 215 {
 216         char *opts[] = {LSG_SERVER_CMD_LSIMG_OPTS, NULL};
 217
 218         if (ci->word[0] == '-')
 219                 return i9e_complete_option(opts, ci, cr);
 220         generic_blob_complete(blob_type, ci, cr);
 221 }
 222
 223 static void complete_rmblob(const char *blob_type,
 224                 struct i9e_completion_info *ci,
 225                 struct i9e_completion_result *cr)
 226 {
 227         generic_blob_complete(blob_type, ci, cr);
 228 }
 229
 230 static void complete_mvblob(const char *blob_type,
 231                 struct i9e_completion_info *ci,
 232                 struct i9e_completion_result *cr)
 233 {
 234         generic_blob_complete(blob_type, ci, cr);
 235 }
 236
 237 /* these don't need any completions */
 238 I9E_DUMMY_COMPLETER(ff);
 239 I9E_DUMMY_COMPLETER(hup);
 240 I9E_DUMMY_COMPLETER(jmp);
 241 I9E_DUMMY_COMPLETER(next);
 242 I9E_DUMMY_COMPLETER(nomore);
 243 I9E_DUMMY_COMPLETER(pause);
 244 I9E_DUMMY_COMPLETER(play);
 245 I9E_DUMMY_COMPLETER(si);
 246 I9E_DUMMY_COMPLETER(term);
 247 I9E_DUMMY_COMPLETER(stop);
 248 I9E_DUMMY_COMPLETER(addatt);
 249 I9E_DUMMY_COMPLETER(init);
 250 I9E_DUMMY_COMPLETER(tasks);
 251
 252 static struct i9e_completer completers[];
 253
 254 static void help_completer(struct i9e_completion_info *ci,
 255                 struct i9e_completion_result *result)
 256 {
 257         result->matches = i9e_complete_commands(ci->word, completers);
 258 }
 259
 260 static void stat_completer(struct i9e_completion_info *ci,
 261                 struct i9e_completion_result *cr)
 262 {
 263         char *opts[] = {LSG_SERVER_CMD_STAT_OPTS, NULL};
 264         i9e_complete_option(opts, ci, cr);
 265 }
 266
 267 static void version_completer(struct i9e_completion_info *ci,
 268                 struct i9e_completion_result *cr)
 269 {
 270         char *opts[] = {LSG_SERVER_CMD_VERSION_OPTS, NULL};
 271         i9e_complete_option(opts, ci, cr);
 272 }
 273
 274 static void sender_completer(struct i9e_completion_info *ci,
 275                 struct i9e_completion_result *cr)
 276 {
 277         char *senders[] = {"http", "dccp", "udp", NULL};
 278         char *http_cmds[] = {"on", "off", "allow", "deny", "help", NULL};
 279         char *dccp_cmds[] = {"on", "off", "allow", "deny", "help", NULL};
 280         char *udp_cmds[] ={"on", "off", "add", "delete", "help", NULL};
 281         char *sender;
 282         char **cmds;
 283
 284         //PARA_CRIT_LOG("wn: %d\n", ci->word_num);
 285         if (ci->word_num == 0 || ci->word_num > 3)
 286                 return;
 287         if (ci->word_num == 1 || (ci->word_num == 2 && *ci->word != '\0')) {
 288                 i9e_extract_completions(ci->word, senders, &cr->matches);
 289                 return;
 290         }
 291         sender = ci->argv[1];
 292         //PARA_CRIT_LOG("sender: %s\n", sender);
 293         if (strcmp(sender, "http") == 0)
 294                 cmds = http_cmds;
 295         else if (strcmp(sender, "dccp") == 0)
 296                 cmds = dccp_cmds;
 297         else if (strcmp(sender, "udp") == 0)
 298                 cmds = udp_cmds;
 299         else
 300                 return;
 301         i9e_extract_completions(ci->word, cmds, &cr->matches);
 302 }
 303
 304 static void add_completer(struct i9e_completion_info *ci,
 305                 struct i9e_completion_result *cr)
 306 {
 307         char *opts[] = {LSG_SERVER_CMD_ADD_OPTS, NULL};
 308
 309         if (ci->word[0] == '-')
 310                 i9e_complete_option(opts, ci, cr);
 311         cr->filename_completion_desired = true;
 312 }
 313
 314 static void ls_completer(struct i9e_completion_info *ci,
 315                 struct i9e_completion_result *cr)
 316 {
 317         char *opts[] = {LSG_SERVER_CMD_LS_OPTS, NULL};
 318         if (ci->word[0] == '-')
 319                 i9e_complete_option(opts, ci, cr);
 320         cr->filename_completion_desired = true;
 321 }
 322
 323 static void setatt_completer(struct i9e_completion_info *ci,
 324                 struct i9e_completion_result *cr)
 325 {
 326         char *buf, **sl;
 327         int i, ret, num_atts;
 328
 329         if (ci->word_num == 0)
 330                 return;
 331
 332         if (*ci->word == '/' || *ci->word == '\0')
 333                 cr->filename_completion_desired = true;
 334         if (*ci->word == '/')
 335                 return;
 336         ret = execute_client_command("lsatt", &buf);
 337         if (ret < 0)
 338                 return;
 339         ret = create_argv(buf, "\n", &sl);
 340         if (ret < 0)
 341                 goto out;
 342         num_atts = ret;
 343         sl = para_realloc(sl, (2 * num_atts + 1) * sizeof(char *));
 344         for (i = 0; i < num_atts; i++) {
 345                 char *orig = sl[i];
 346                 sl[i] = make_message("%s+", orig);
 347                 sl[num_atts + i] = make_message("%s-", orig);
 348                 free(orig);
 349         }
 350         sl[2 * num_atts] = NULL;
 351         i9e_extract_completions(ci->word, sl, &cr->matches);
 352 out:
 353         free(buf);
 354         free_argv(sl);
 355 }
 356
 357 static void lsatt_completer(struct i9e_completion_info *ci,
 358                 struct i9e_completion_result *cr)
 359 {
 360         char *opts[] = {LSG_SERVER_CMD_LSATT_OPTS, NULL};
 361         i9e_complete_option(opts, ci, cr);
 362 }
 363
 364 static void mvatt_completer(struct i9e_completion_info *ci,
 365                 struct i9e_completion_result *cr)
 366 {
 367         complete_attributes(ci->word, &cr->matches);
 368 }
 369
 370 static void rmatt_completer(struct i9e_completion_info *ci,
 371                 struct i9e_completion_result *cr)
 372 {
 373         complete_attributes(ci->word, &cr->matches);
 374 }
 375
 376 static void check_completer(struct i9e_completion_info *ci,
 377                 struct i9e_completion_result *cr)
 378 {
 379         char *opts[] = {LSG_SERVER_CMD_CHECK_OPTS, NULL};
 380         i9e_complete_option(opts, ci, cr);
 381 }
 382
 383 static void rm_completer(struct i9e_completion_info *ci,
 384                 struct i9e_completion_result *cr)
 385 {
 386         char *opts[] = {LSG_SERVER_CMD_RM_OPTS, NULL};
 387
 388         if (ci->word[0] == '-') {
 389                 i9e_complete_option(opts, ci, cr);
 390                 return;
 391         }
 392         cr->filename_completion_desired = true;
 393 }
 394
 395 static void touch_completer(struct i9e_completion_info *ci,
 396                 struct i9e_completion_result *cr)
 397 {
 398         char *opts[] = {LSG_SERVER_CMD_TOUCH_OPTS, NULL};
 399
 400         if (ci->word[0] == '-')
 401                 i9e_complete_option(opts, ci, cr);
 402         cr->filename_completion_desired = true;
 403 }
 404
 405 static void cpsi_completer(struct i9e_completion_info *ci,
 406                 struct i9e_completion_result *cr)
 407 {
 408         char *opts[] = {LSG_SERVER_CMD_CPSI_OPTS, NULL};
 409
 410         if (ci->word[0] == '-')
 411                 i9e_complete_option(opts, ci, cr);
 412         cr->filename_completion_desired = true;
 413 }
 414
 415 static void select_completer(struct i9e_completion_info *ci,
 416                 struct i9e_completion_result *cr)
 417 {
 418         char *mood_buf, *pl_buf, **moods, **playlists, **mops;
 419         int num_moods, num_pl, i, n, ret;
 420
 421         ret = execute_client_command("lsmood", &mood_buf);
 422         if (ret < 0)
 423                 return;
 424         ret = execute_client_command("lspl", &pl_buf);
 425         if (ret < 0)
 426                 goto free_mood_buf;
 427
 428         ret = create_argv(mood_buf, "\n", &moods);
 429         if (ret < 0)
 430                 goto free_pl_buf;
 431         num_moods = ret;
 432         ret = create_argv(pl_buf, "\n", &playlists);
 433         if (ret < 0)
 434                 goto free_moods;
 435         num_pl = ret;
 436         n = num_moods + num_pl;
 437         mops = para_malloc((n + 1) * sizeof(char *));
 438         for (i = 0; i < num_moods; i++)
 439                 mops[i] = make_message("m/%s", moods[i]);
 440         for (i = 0; i < num_pl; i++)
 441                 mops[num_moods + i] = make_message("p/%s", playlists[i]);
 442         mops[n] = NULL;
 443         i9e_extract_completions(ci->word, mops, &cr->matches);
 444         free_argv(mops);
 445         free_argv(playlists);
 446 free_moods:
 447         free_argv(moods);
 448 free_pl_buf:
 449         free(pl_buf);
 450 free_mood_buf:
 451         free(mood_buf);
 452 }
 453
 454 #define DEFINE_BLOB_COMPLETER(cmd, blob_type) \
 455         static void cmd ## blob_type ## _completer( \
 456                 struct i9e_completion_info *ci, \
 457                 struct i9e_completion_result *cr) \
 458         {complete_ ## cmd ## blob(#blob_type, ci, cr);}
 459
 460 DEFINE_BLOB_COMPLETER(add, mood)
 461 DEFINE_BLOB_COMPLETER(add, lyr)
 462 DEFINE_BLOB_COMPLETER(add, img)
 463 DEFINE_BLOB_COMPLETER(add, pl)
 464 DEFINE_BLOB_COMPLETER(cat, mood)
 465 DEFINE_BLOB_COMPLETER(cat, lyr)
 466 DEFINE_BLOB_COMPLETER(cat, img)
 467 DEFINE_BLOB_COMPLETER(cat, pl)
 468 DEFINE_BLOB_COMPLETER(ls, mood)
 469 DEFINE_BLOB_COMPLETER(ls, lyr)
 470 DEFINE_BLOB_COMPLETER(ls, img)
 471 DEFINE_BLOB_COMPLETER(ls, pl)
 472 DEFINE_BLOB_COMPLETER(rm, mood)
 473 DEFINE_BLOB_COMPLETER(rm, lyr)
 474 DEFINE_BLOB_COMPLETER(rm, img)
 475 DEFINE_BLOB_COMPLETER(rm, pl)
 476 DEFINE_BLOB_COMPLETER(mv, mood)
 477 DEFINE_BLOB_COMPLETER(mv, lyr)
 478 DEFINE_BLOB_COMPLETER(mv, img)
 479 DEFINE_BLOB_COMPLETER(mv, pl)
 480
 481 static int client_i9e_line_handler(char *line)
 482 {
 483         int ret;
 484         static bool first = true;
 485
 486         if (first)
 487                 first = false;
 488         else
 489                 lls_free_parse_result(ct->lpr, CLIENT_CMD_PTR);
 490         ret = create_merged_lpr(line);
 491         if (ret <= 0)
 492                 return ret;
 493         ret = client_connect(ct, &sched, NULL, NULL);
 494         if (ret < 0)
 495                 return ret;
 496         i9e_attach_to_stdout(ct->btrn[0]);
 497         return 1;
 498 }
 499
 500 I9E_DUMMY_COMPLETER(SUPERCOMMAND_UNAVAILABLE);
 501 static struct i9e_completer completers[] = {
 502 #define LSG_SERVER_CMD_CMD(_name) {.name = #_name, \
 503         .completer = _name ## _completer}
 504         LSG_SERVER_CMD_SUBCOMMANDS
 505 #undef LSG_SERVER_CMD_CMD
 506         {.name = NULL}
 507 };
 508
 509 __noreturn static void interactive_session(void)
 510 {
 511         int ret;
 512         struct sigaction act;
 513         struct i9e_client_info ici = {
 514                 .fds = {0, 1, 2},
 515                 .prompt = "para_client> ",
 516                 .line_handler = client_i9e_line_handler,
 517                 .loglevel = client_loglevel,
 518                 .completers = completers,
 519         };
 520
 521         PARA_NOTICE_LOG("\n%s\n", version_text("client"));
 522         if (CLIENT_OPT_GIVEN(HISTORY_FILE, ct->lpr))
 523                 ici.history_file = para_strdup(CLIENT_OPT_STRING_VAL(
 524                         HISTORY_FILE, ct->lpr));
 525         else {
 526                 char *home = para_homedir();
 527                 ici.history_file = make_message("%s/.paraslash/client.history",
 528                         home);
 529                 free(home);
 530         }
 531         act.sa_handler = i9e_signal_dispatch;
 532         sigemptyset(&act.sa_mask);
 533         act.sa_flags = 0;
 534         sigaction(SIGINT, &act, NULL);
 535         sched.select_function = i9e_select;
 536
 537         ret = i9e_open(&ici, &sched);
 538         if (ret < 0)
 539                 goto out;
 540         para_log = i9e_log;
 541         ret = schedule(&sched);
 542         sched_shutdown(&sched);
 543         i9e_close();
 544         para_log = stderr_log;
 545 out:
 546         if (ret < 0)
 547                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 548         exit(ret < 0? EXIT_FAILURE : EXIT_SUCCESS);
 549         //client_close(ct);
 550 }
 551
 552 __noreturn static void print_completions(void)
 553 {
 554         int ret;
 555
 556         ret = i9e_print_completions(completers);
 557         exit(ret <= 0? EXIT_FAILURE : EXIT_SUCCESS);
 558 }
 559
 560 #else /* HAVE_READLINE */
 561
 562 __noreturn static void interactive_session(void)
 563 {
 564         PARA_EMERG_LOG("interactive sessions not available\n");
 565         exit(EXIT_FAILURE);
 566 }
 567
 568 __noreturn static void print_completions(void)
 569 {
 570         PARA_EMERG_LOG("command completion not available\n");
 571         exit(EXIT_FAILURE);
 572 }
 573
 574 #endif /* HAVE_READLINE */
 575
 576 struct supervisor_task {
 577         bool stdout_task_started;
 578         struct task *task;
 579 };
 580
 581 static int supervisor_post_select(struct sched *s, void *context)
 582 {
 583         struct supervisor_task *svt = context;
 584         int ret = task_status(ct->task);
 585
 586         if (ret < 0)
 587                 return ret;
 588         if (!svt->stdout_task_started && ct->status == CL_EXECUTING) {
 589                 stdout_task_register(&sot, s);
 590                 svt->stdout_task_started = true;
 591                 return 1;
 592         }
 593         if (ct->status == CL_SENDING) {
 594                 stdin_task_register(&sit, s);
 595                 return -E_TASK_STARTED;
 596         }
 597         return 0;
 598 }
 599
 600 static struct supervisor_task supervisor_task;
 601
 602 /**
 603  * The client program to connect to para_server.
 604  *
 605  * \param argc Usual argument count.
 606  * \param argv Usual argument vector.
 607  *
 608  * When called without a paraslash command, an interactive session is started.
 609  * Otherwise, the client task and the supervisor task are started. The former
 610  * communicates with para_server while the latter monitors whether the client
 611  * task intends to read from stdin or write to stdout.
 612  *
 613  * Once it has been determined whether the client command corresponds to a
 614  * stdin command (addmood, addimg, ..), either the stdin task or the stdout
 615  * task is set up to replace the supervisor task.
 616  *
 617  * \return EXIT_SUCCESS or EXIT_FAILURE
 618  *
 619  * \sa client_open(), stdin.c, stdout.c, para_client(1), para_server(1)
 620  */
 621 int main(int argc, char *argv[])
 622 {
 623         int ret;
 624
 625         init_random_seed_or_die();
 626         sched.default_timeout.tv_sec = 1;
 627
 628         ret = client_parse_config(argc, argv, &ct, &client_loglevel);
 629         if (ret < 0)
 630                 goto out;
 631         if (CLIENT_OPT_GIVEN(COMPLETE, ct->lpr))
 632                 print_completions();
 633         if (ret == 0)
 634                 interactive_session(); /* does not return */
 635
 636         /*
 637          * We add buffer tree nodes for stdin and stdout even though
 638          * only one of them will be needed. This simplifies the code
 639          * a bit wrt. to the buffer tree setup.
 640          */
 641         sit.btrn = btr_new_node(&(struct btr_node_description)
 642                 EMBRACE(.name = "stdin"));
 643         ret = client_connect(ct, &sched, sit.btrn, NULL);
 644         if (ret < 0)
 645                 goto out;
 646         sot.btrn = btr_new_node(&(struct btr_node_description)
 647                 EMBRACE(.name = "stdout", .parent = ct->btrn[0]));
 648         supervisor_task.task = task_register(&(struct task_info) {
 649                 .name = "supervisor",
 650                 .post_select = supervisor_post_select,
 651                 .context = &supervisor_task,
 652         }, &sched);
 653
 654         ret = schedule(&sched);
 655         if (ret >= 0) {
 656                 ret = task_status(ct->task);
 657                 if (ret < 0) {
 658                         switch (ret) {
 659                         /* these are not errors */
 660                         case -E_SERVER_CMD_SUCCESS:
 661                         case -E_EOF:
 662                         case -E_SERVER_EOF:
 663                         case -E_BTR_EOF:
 664                                 ret = 0;
 665                                 break;
 666                         default: ret = -E_SERVER_CMD_FAILURE;
 667                         }
 668                 }
 669         }
 670         sched_shutdown(&sched);
 671 out:
 672         if (ret < 0)
 673                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 674         client_close(ct);
 675         btr_remove_node(&sit.btrn);
 676         btr_remove_node(&sot.btrn);
 677         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 678 }