src/main/radmin.c

   1 /*
   2  * radmin.c     RADIUS Administration tool.
   3  *
   4  * Version:     $Id$
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * Copyright 2012   The FreeRADIUS server project
  21  * Copyright 2012   Alan DeKok <aland@deployingradius.com>
  22  */
  23
  24 RCSID("$Id$")
  25
  26 #include <freeradius-devel/radiusd.h>
  27
  28 #ifdef HAVE_SYS_UN_H
  29 #include <sys/un.h>
  30 #ifndef SUN_LEN
  31 #define SUN_LEN(su)  (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
  32 #endif
  33 #endif
  34
  35 #ifdef HAVE_GETOPT_H
  36 #include <getopt.h>
  37 #endif
  38
  39 #ifdef HAVE_SYS_STAT_H
  40 #include <sys/stat.h>
  41 #endif
  42
  43 #ifdef HAVE_LIBREADLINE
  44
  45 #if defined(HAVE_READLINE_READLINE_H)
  46 #include <readline/readline.h>
  47 #define USE_READLINE (1)
  48 #elif defined(HAVE_READLINE_H)
  49 #include <readline.h>
  50 #define USE_READLINE (1)
  51 #endif /* !defined(HAVE_READLINE_H) */
  52
  53 #ifdef HAVE_READLINE_HISTORY
  54 #if defined(HAVE_READLINE_HISTORY_H)
  55 #include <readline/history.h>
  56 #define USE_READLINE_HISTORY (1)
  57 #elif defined(HAVE_HISTORY_H)
  58 #include <history.h>
  59 #define USE_READLINE_HISTORY (1)
  60 #endif /* defined(HAVE_READLINE_HISTORY_H) */
  61
  62 #endif /* HAVE_READLINE_HISTORY */
  63
  64 #endif /* HAVE_LIBREADLINE */
  65
  66 /*
  67  *      For configuration file stuff.
  68  */
  69 char const *progname = "radmin";
  70 char const *radmin_version = "radmin version " RADIUSD_VERSION_STRING
  71 #ifdef RADIUSD_VERSION_COMMIT
  72 " (git #" STRINGIFY(RADIUSD_VERSION_COMMIT) ")"
  73 #endif
  74 ", built on " __DATE__ " at " __TIME__;
  75
  76
  77 /*
  78  *      The rest of this is because the conffile.c, etc. assume
  79  *      they're running inside of the server.  And we don't (yet)
  80  *      have a "libfreeradius-server", or "libfreeradius-util".
  81  */
  82 log_debug_t debug_flag = 0;
  83 struct main_config_t mainconfig;
  84
  85 bool check_config = false;
  86
  87 static FILE *outputfp = NULL;
  88 static bool echo = false;
  89 static char const *secret = "testing123";
  90
  91 #include <sys/wait.h>
  92 pid_t rad_fork(void)
  93 {
  94         return fork();
  95 }
  96
  97 #ifdef HAVE_PTHREAD_H
  98 pid_t rad_waitpid(pid_t pid, int *status)
  99 {
 100         return waitpid(pid, status, 0);
 101 }
 102 #endif
 103
 104 static void NEVER_RETURNS usage(int status)
 105 {
 106         FILE *output = status ? stderr : stdout;
 107         fprintf(output, "Usage: %s [ args ]\n", progname);
 108         fprintf(output, "  -d raddb_dir    Configuration files are in \"raddbdir/*\".\n");
 109         fprintf(stderr, "  -D <dictdir>    Set main dictionary directory (defaults to " DICTDIR ").\n");
 110         fprintf(output, "  -e command      Execute 'command' and then exit.\n");
 111         fprintf(output, "  -E              Echo commands as they are being executed.\n");
 112         fprintf(output, "  -f socket_file  Open socket_file directly, without reading radius.conf\n");
 113         fprintf(output, "  -h              Print usage help information.\n");
 114         fprintf(output, "  -i input_file   Read commands from 'input_file'.\n");
 115         fprintf(output, "  -n name         Read raddb/name.conf instead of raddb/radiusd.conf\n");
 116         fprintf(output, "  -o output_file  Write commands to 'output_file'.\n");
 117         fprintf(output, "  -q              Quiet mode.\n");
 118
 119         exit(status);
 120 }
 121
 122 static int fr_domain_socket(char const *path)
 123 {
 124         int sockfd = -1;
 125 #ifdef HAVE_SYS_UN_H
 126         size_t len;
 127         socklen_t socklen;
 128         struct sockaddr_un saremote;
 129
 130         len = strlen(path);
 131         if (len >= sizeof(saremote.sun_path)) {
 132                 fprintf(stderr, "%s: Path too long in filename\n", progname);
 133                 return -1;
 134         }
 135
 136         if ((sockfd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
 137                 fprintf(stderr, "%s: Failed creating socket: %s\n",
 138                         progname, fr_syserror(errno));
 139                 return -1;
 140         }
 141
 142         saremote.sun_family = AF_UNIX;
 143         memcpy(saremote.sun_path, path, len + 1); /* SUN_LEN does strlen */
 144
 145         socklen = SUN_LEN(&saremote);
 146
 147         if (connect(sockfd, (struct sockaddr *)&saremote, socklen) < 0) {
 148                 struct stat buf;
 149
 150                 close(sockfd);
 151                 fprintf(stderr, "%s: Failed connecting to %s: %s\n",
 152                         progname, path, fr_syserror(errno));
 153
 154                 /*
 155                  *      The file doesn't exist.  Tell the user how to
 156                  *      fix it.
 157                  */
 158                 if ((stat(path, &buf) < 0) &&
 159                     (errno == ENOENT)) {
 160                         fprintf(stderr, "  Perhaps you need to run the commands:\n\tcd /etc/raddb\n\tln -s sites-available/control-socket sites-enabled/control-socket\n  and then re-start the server?\n");
 161                 }
 162
 163                 return -1;
 164         }
 165
 166 #ifdef O_NONBLOCK
 167         {
 168                 int flags;
 169
 170                 if ((flags = fcntl(sockfd, F_GETFL, NULL)) < 0)  {
 171                         fprintf(stderr, "%s: Failure getting socket flags: %s",
 172                                 progname, fr_syserror(errno));
 173                         close(sockfd);
 174                         return -1;
 175                 }
 176
 177                 flags |= O_NONBLOCK;
 178                 if( fcntl(sockfd, F_SETFL, flags) < 0) {
 179                         fprintf(stderr, "%s: Failure setting socket flags: %s",
 180                                 progname, fr_syserror(errno));
 181                         close(sockfd);
 182                         return -1;
 183                 }
 184         }
 185 #endif
 186 #endif
 187         return sockfd;
 188 }
 189
 190 static int client_socket(char const *server)
 191 {
 192         int sockfd, port;
 193         fr_ipaddr_t ipaddr;
 194         char *p, buffer[1024];
 195
 196         strlcpy(buffer, server, sizeof(buffer));
 197
 198         p = strchr(buffer, ':');
 199         if (!p) {
 200                 port = PW_RADMIN_PORT;
 201         } else {
 202                 port = atoi(p + 1);
 203                 *p = '\0';
 204         }
 205
 206         if (ip_hton(buffer, AF_INET, &ipaddr) < 0) {
 207                 fprintf(stderr, "%s: Failed looking up host %s: %s\n",
 208                         progname, buffer, fr_syserror(errno));
 209                 exit(1);
 210         }
 211
 212         sockfd = fr_tcp_client_socket(NULL, &ipaddr, port);
 213         if (sockfd < 0) {
 214                 fprintf(stderr, "%s: Failed opening socket %s: %s\n",
 215                         progname, server, fr_syserror(errno));
 216                 exit(1);
 217         }
 218
 219         return sockfd;
 220 }
 221
 222 static void do_challenge(int sockfd)
 223 {
 224         size_t total;
 225         ssize_t r;
 226         uint8_t challenge[16];
 227
 228         for (total = 0; total < sizeof(challenge); ) {
 229                 r = read(sockfd, challenge + total, sizeof(challenge) - total);
 230                 if (r == 0) exit(1);
 231
 232                 if (r < 0) {
 233 #ifdef ECONNRESET
 234                         if (errno == ECONNRESET) {
 235                                 fprintf(stderr, "%s: Connection reset",
 236                                         progname);
 237                                 exit(1);
 238                         }
 239 #endif
 240                         if (errno == EINTR) continue;
 241
 242                         fprintf(stderr, "%s: Failed reading data: %s\n",
 243                                 progname, fr_syserror(errno));
 244                         exit(1);
 245                 }
 246                 total += r;
 247                 fflush(stdout);
 248         }
 249
 250         fr_hmac_md5((uint8_t const *) secret, strlen(secret),
 251                     challenge, sizeof(challenge), challenge);
 252
 253         if (write(sockfd, challenge, sizeof(challenge)) < 0) {
 254                 fprintf(stderr, "%s: Failed writing challenge data: %s\n",
 255                         progname, fr_syserror(errno));
 256         }
 257 }
 258
 259 static ssize_t run_command(int sockfd, char const *command,
 260                            char *buffer, size_t bufsize)
 261 {
 262         char *p;
 263         ssize_t size, len;
 264
 265         if (echo) {
 266                 fprintf(outputfp, "%s\n", command);
 267         }
 268
 269         /*
 270          *      Write the text to the socket.
 271          */
 272         if (write(sockfd, command, strlen(command)) < 0) return -1;
 273         if (write(sockfd, "\r\n", 2) < 0) return -1;
 274
 275         /*
 276          *      Read the response
 277          */
 278         size = 0;
 279         buffer[0] = '\0';
 280
 281         memset(buffer, 0, bufsize);
 282
 283         while (1) {
 284                 int rcode;
 285                 fd_set readfds;
 286
 287                 FD_ZERO(&readfds);
 288                 FD_SET(sockfd, &readfds);
 289
 290                 rcode = select(sockfd + 1, &readfds, NULL, NULL, NULL);
 291                 if (rcode < 0) {
 292                         if (errno == EINTR) continue;
 293
 294                         fprintf(stderr, "%s: Failed selecting: %s\n",
 295                                 progname, fr_syserror(errno));
 296                         exit(1);
 297                 }
 298
 299                 if (rcode == 0) {
 300                         fprintf(stderr, "%s: Server closed the connection.\n",
 301                                 progname);
 302                         exit(1);
 303                 }
 304
 305 #ifdef MSG_DONTWAIT
 306                 len = recv(sockfd, buffer + size,
 307                            bufsize - size - 1, MSG_DONTWAIT);
 308 #else
 309                 /*
 310                  *      Read one byte at a time (ugh)
 311                  */
 312                 len = recv(sockfd, buffer + size, 1, 0);
 313 #endif
 314                 if (len < 0) {
 315                         /*
 316                          *      No data: keep looping
 317                          */
 318                         if ((errno == EAGAIN) || (errno == EINTR)) {
 319                                 continue;
 320                         }
 321
 322                         fprintf(stderr, "%s: Error reading socket: %s\n",
 323                                 progname, fr_syserror(errno));
 324                         exit(1);
 325                 }
 326                 if (len == 0) return 0; /* clean exit */
 327
 328                 size += len;
 329                 buffer[size] = '\0';
 330
 331                 /*
 332                  *      There really is a better way of doing this.
 333                  */
 334                 p = strstr(buffer, "radmin> ");
 335                 if (p &&
 336                     ((p == buffer) ||
 337                      (p[-1] == '\n') ||
 338                      (p[-1] == '\r'))) {
 339                         *p = '\0';
 340
 341                         if (p[-1] == '\n') p[-1] = '\0';
 342                         break;
 343                 }
 344         }
 345
 346         /*
 347          *      Blank prompt.  Go get another command.
 348          */
 349         if (!buffer[0]) return 1;
 350
 351         buffer[size] = '\0'; /* this is at least right */
 352
 353         return 2;
 354 }
 355
 356 #define MAX_COMMANDS (4)
 357
 358 int main(int argc, char **argv)
 359 {
 360         int             argval;
 361         bool            quiet = false;
 362         bool            done_license = false;
 363         int             sockfd;
 364         uint32_t        magic, needed;
 365         char            *line = NULL;
 366         ssize_t         len, size;
 367         char const      *file = NULL;
 368         char const      *name = "radiusd";
 369         char            *p, buffer[65536];
 370         char const      *input_file = NULL;
 371         FILE            *inputfp = stdin;
 372         char const      *output_file = NULL;
 373         char const      *server = NULL;
 374
 375         char const      *radius_dir = RADIUS_DIR;
 376         char const      *dict_dir = DICTDIR;
 377
 378         char *commands[MAX_COMMANDS];
 379         int num_commands = -1;
 380
 381 #ifndef NDEBUG
 382         fr_fault_setup(getenv("PANIC_ACTION"), argv[0]);
 383 #endif
 384
 385         talloc_set_log_stderr();
 386
 387         outputfp = stdout;      /* stdout is not a constant value... */
 388
 389         if ((progname = strrchr(argv[0], FR_DIR_SEP)) == NULL) {
 390                 progname = argv[0];
 391         } else {
 392                 progname++;
 393         }
 394
 395         while ((argval = getopt(argc, argv, "d:D:hi:e:Ef:n:o:qs:S")) != EOF) {
 396                 switch(argval) {
 397                 case 'd':
 398                         if (file) {
 399                                 fprintf(stderr, "%s: -d and -f cannot be used together.\n", progname);
 400                                 exit(1);
 401                         }
 402                         if (server) {
 403                                 fprintf(stderr, "%s: -d and -s cannot be used together.\n", progname);
 404                                 exit(1);
 405                         }
 406                         radius_dir = optarg;
 407                         break;
 408
 409                 case 'D':
 410                         dict_dir = optarg;
 411                         break;
 412
 413                 case 'e':
 414                         num_commands++; /* starts at -1 */
 415                         if (num_commands >= MAX_COMMANDS) {
 416                                 fprintf(stderr, "%s: Too many '-e'\n",
 417                                         progname);
 418                                 exit(1);
 419                         }
 420                         commands[num_commands] = optarg;
 421                         break;
 422
 423                 case 'E':
 424                         echo = true;
 425                         break;
 426
 427                 case 'f':
 428                         radius_dir = NULL;
 429                         file = optarg;
 430                         break;
 431
 432                 default:
 433                 case 'h':
 434                         usage(0);
 435                         break;
 436
 437                 case 'i':
 438                         if (strcmp(optarg, "-") != 0) {
 439                                 input_file = optarg;
 440                         }
 441                         quiet = true;
 442                         break;
 443
 444                 case 'n':
 445                         name = optarg;
 446                         break;
 447
 448                 case 'o':
 449                         if (strcmp(optarg, "-") != 0) {
 450                                 output_file = optarg;
 451                         }
 452                         quiet = true;
 453                         break;
 454
 455                 case 'q':
 456                         quiet = true;
 457                         break;
 458
 459                 case 's':
 460                         if (file) {
 461                                 fprintf(stderr, "%s: -s and -f cannot be used together.\n", progname);
 462                                 usage(1);
 463                         }
 464                         radius_dir = NULL;
 465                         server = optarg;
 466                         break;
 467
 468                 case 'S':
 469                         secret = NULL;
 470                         break;
 471                 }
 472         }
 473
 474         /*
 475          *      Mismatch between the binary and the libraries it depends on
 476          */
 477         if (fr_check_lib_magic(RADIUSD_MAGIC_NUMBER) < 0) {
 478                 fr_perror("radmin");
 479                 exit(1);
 480         }
 481
 482         if (radius_dir) {
 483                 int rcode;
 484                 CONF_SECTION *cs, *subcs;
 485
 486                 file = NULL;    /* MUST read it from the conffile now */
 487
 488                 snprintf(buffer, sizeof(buffer), "%s/%s.conf", radius_dir, name);
 489
 490                 /*
 491                  *      Need to read in the dictionaries, else we may get
 492                  *      validation errors when we try and parse the config.
 493                  */
 494                 if (dict_init(dict_dir, RADIUS_DICTIONARY) < 0) {
 495                         fr_perror("radmin");
 496                         exit(64);
 497                 }
 498
 499                 if (dict_read(radius_dir, RADIUS_DICTIONARY) == -1) {
 500                         fr_perror("radmin");
 501                         exit(64);
 502                 }
 503
 504                 cs = cf_file_read(buffer);
 505                 if (!cs) {
 506                         fprintf(stderr, "%s: Errors reading or parsing %s\n", progname, buffer);
 507                         usage(1);
 508                 }
 509
 510                 subcs = NULL;
 511                 while ((subcs = cf_subsection_find_next(cs, subcs, "listen")) != NULL) {
 512                         char const *value;
 513                         CONF_PAIR *cp = cf_pair_find(subcs, "type");
 514
 515                         if (!cp) continue;
 516
 517                         value = cf_pair_value(cp);
 518                         if (!value) continue;
 519
 520                         if (strcmp(value, "control") != 0) continue;
 521
 522                         /*
 523                          *      Now find the socket name (sigh)
 524                          */
 525                         rcode = cf_item_parse(subcs, "socket",
 526                                               PW_TYPE_STRING_PTR,
 527                                               &file, NULL);
 528                         if (rcode < 0) {
 529                                 fprintf(stderr, "%s: Failed parsing listen section\n", progname);
 530                                 exit(1);
 531                         }
 532
 533                         if (!file) {
 534                                 fprintf(stderr, "%s: No path given for socket\n", progname);
 535                                 usage(1);
 536                         }
 537                         break;
 538                 }
 539
 540                 if (!file) {
 541                         fprintf(stderr, "%s: Could not find control socket in %s\n", progname, buffer);
 542                         exit(1);
 543                 }
 544         }
 545
 546         if (input_file) {
 547                 inputfp = fopen(input_file, "r");
 548                 if (!inputfp) {
 549                         fprintf(stderr, "%s: Failed opening %s: %s\n", progname, input_file, fr_syserror(errno));
 550                         exit(1);
 551                 }
 552         }
 553
 554         if (output_file) {
 555                 outputfp = fopen(output_file, "w");
 556                 if (!outputfp) {
 557                         fprintf(stderr, "%s: Failed creating %s: %s\n", progname, output_file, fr_syserror(errno));
 558                         exit(1);
 559                 }
 560         }
 561
 562         if (!file && !server) {
 563                 fprintf(stderr, "%s: Must use one of '-d' or '-f' or '-s'\n",
 564                         progname);
 565                 exit(1);
 566         }
 567
 568         /*
 569          *      Check if stdin is a TTY only if input is from stdin
 570          */
 571         if (input_file && !quiet && !isatty(STDIN_FILENO)) quiet = true;
 572
 573 #ifdef USE_READLINE
 574         if (!quiet) {
 575 #ifdef USE_READLINE_HISTORY
 576                 using_history();
 577 #endif
 578                 rl_bind_key('\t', rl_insert);
 579         }
 580 #endif
 581
 582  reconnect:
 583         if (file) {
 584                 /*
 585                  *      FIXME: Get destination from command line, if possible?
 586                  */
 587                 sockfd = fr_domain_socket(file);
 588                 if (sockfd < 0) {
 589                         exit(1);
 590                 }
 591         } else {
 592                 sockfd = client_socket(server);
 593         }
 594
 595         /*
 596          *      Read initial magic && version information.
 597          */
 598         for (size = 0; size < 8; size += len) {
 599                 len = read(sockfd, buffer + size, 8 - size);
 600                 if (len < 0) {
 601                         fprintf(stderr, "%s: Error reading initial data from socket: %s\n",
 602                                 progname, fr_syserror(errno));
 603                         exit(1);
 604                 }
 605         }
 606
 607         memcpy(&magic, buffer, 4);
 608         magic = ntohl(magic);
 609         if (magic != 0xf7eead15) {
 610                 fprintf(stderr, "%s: Socket %s is not FreeRADIUS administration socket\n", progname, file);
 611                 exit(1);
 612         }
 613
 614         memcpy(&magic, buffer + 4, 4);
 615         magic = ntohl(magic);
 616
 617         if (!server) {
 618                 needed = 1;
 619         } else {
 620                 needed = 2;
 621         }
 622
 623         if (magic != needed) {
 624                 fprintf(stderr, "%s: Socket version mismatch: Need %d, got %d\n",
 625                         progname, needed, magic);
 626                 exit(1);
 627         }
 628
 629         if (server && secret) do_challenge(sockfd);
 630
 631         /*
 632          *      Run one command.
 633          */
 634         if (num_commands >= 0) {
 635                 int i;
 636
 637                 for (i = 0; i <= num_commands; i++) {
 638                         size = run_command(sockfd, commands[i],
 639                                            buffer, sizeof(buffer));
 640                         if (size < 0) exit(1);
 641
 642                         if (buffer[0]) {
 643                                 fputs(buffer, outputfp);
 644                                 fprintf(outputfp, "\n");
 645                                 fflush(outputfp);
 646                         }
 647                 }
 648                 exit(0);
 649         }
 650
 651         if (!done_license && !quiet) {
 652                 printf("%s - FreeRADIUS Server administration tool.\n", radmin_version);
 653                 printf("Copyright (C) 2008-2014 The FreeRADIUS server project and contributors.\n");
 654                 printf("There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A\n");
 655                 printf("PARTICULAR PURPOSE.\n");
 656                 printf("You may redistribute copies of FreeRADIUS under the terms of the\n");
 657                 printf("GNU General Public License v2.\n");
 658
 659                 done_license = true;
 660         }
 661
 662         /*
 663          *      FIXME: Do login?
 664          */
 665
 666         while (1) {
 667 #ifndef USE_READLINE
 668                 if (!quiet) {
 669                         printf("radmin> ");
 670                         fflush(stdout);
 671                 }
 672 #else
 673                 if (!quiet) {
 674                         line = readline("radmin> ");
 675
 676                         if (!line) break;
 677
 678                         if (!*line) {
 679                                 free(line);
 680                                 continue;
 681                         }
 682
 683 #ifdef USE_READLINE_HISTORY
 684                         add_history(line);
 685 #endif
 686                 } else          /* quiet, or no readline */
 687 #endif
 688                 {
 689                         line = fgets(buffer, sizeof(buffer), inputfp);
 690                         if (!line) break;
 691
 692                         p = strchr(buffer, '\n');
 693                         if (!p) {
 694                                 fprintf(stderr, "%s: Input line too long\n",
 695                                         progname);
 696                                 exit(1);
 697                         }
 698
 699                         *p = '\0';
 700
 701                         /*
 702                          *      Strip off leading spaces.
 703                          */
 704                         for (p = line; *p != '\0'; p++) {
 705                                 if ((p[0] == ' ') ||
 706                                     (p[0] == '\t')) {
 707                                         line = p + 1;
 708                                         continue;
 709                                 }
 710
 711                                 if (p[0] == '#') {
 712                                         line = NULL;
 713                                         break;
 714                                 }
 715
 716                                 break;
 717                         }
 718
 719                         /*
 720                          *      Comments: keep going.
 721                          */
 722                         if (!line) continue;
 723
 724                         /*
 725                          *      Strip off CR / LF
 726                          */
 727                         for (p = line; *p != '\0'; p++) {
 728                                 if ((p[0] == '\r') ||
 729                                     (p[0] == '\n')) {
 730                                         p[0] = '\0';
 731                                         break;
 732                                 }
 733                         }
 734                 }
 735
 736                 if (strcmp(line, "reconnect") == 0) {
 737                         close(sockfd);
 738                         line = NULL;
 739                         goto reconnect;
 740                 }
 741
 742                 if (memcmp(line, "secret ", 7) == 0) {
 743                         if (!secret) {
 744                                 secret = line + 7;
 745                                 do_challenge(sockfd);
 746                         }
 747                         line = NULL;
 748                         continue;
 749                 }
 750
 751                 /*
 752                  *      Exit, done, etc.
 753                  */
 754                 if ((strcmp(line, "exit") == 0) ||
 755                     (strcmp(line, "quit") == 0)) {
 756                         break;
 757                 }
 758
 759                 if (server && !secret) {
 760                         fprintf(stderr, "ERROR: You must enter 'secret <SECRET>' before running any commands\n");
 761                         line = NULL;
 762                         continue;
 763                 }
 764
 765                 size = run_command(sockfd, line, buffer, sizeof(buffer));
 766                 if (size <= 0) break; /* error, or clean exit */
 767
 768                 if (size == 1) continue; /* no output. */
 769
 770                 fputs(buffer, outputfp);
 771                 fflush(outputfp);
 772                 fprintf(outputfp, "\n");
 773         }
 774
 775         fprintf(outputfp, "\n");
 776
 777         return 0;
 778 }
 779