src/oping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2010  Florian octo Forster <octo at verplant.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; only version 2 of the License is
   8  * applicable.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if STDC_HEADERS
  25 # include <stdlib.h>
  26 # include <stdio.h>
  27 # include <string.h>
  28 # include <errno.h>
  29 # include <assert.h>
  30 #else
  31 # error "You don't have the standard C99 header files installed"
  32 #endif /* STDC_HEADERS */
  33
  34 #if HAVE_UNISTD_H
  35 # include <unistd.h>
  36 #endif
  37
  38 #if HAVE_MATH_H
  39 # include <math.h>
  40 #endif
  41
  42 #if TIME_WITH_SYS_TIME
  43 # include <sys/time.h>
  44 # include <time.h>
  45 #else
  46 # if HAVE_SYS_TIME_H
  47 #  include <sys/time.h>
  48 # else
  49 #  include <time.h>
  50 # endif
  51 #endif
  52
  53 #if HAVE_NETDB_H
  54 # include <netdb.h> /* NI_MAXHOST */
  55 #endif
  56
  57 #if HAVE_SIGNAL_H
  58 # include <signal.h>
  59 #endif
  60
  61 #if HAVE_SYS_TYPES_H
  62 #include <sys/types.h>
  63 #endif
  64
  65 #if USE_NCURSES
  66 # include <ncurses.h>
  67 #endif
  68
  69 #include "oping.h"
  70
  71 #ifndef _POSIX_SAVED_IDS
  72 # define _POSIX_SAVED_IDS 0
  73 #endif
  74
  75 typedef struct ping_context
  76 {
  77         char host[NI_MAXHOST];
  78         char addr[NI_MAXHOST];
  79
  80         int req_sent;
  81         int req_rcvd;
  82
  83         double latency_min;
  84         double latency_max;
  85         double latency_total;
  86         double latency_total_square;
  87
  88 #if USE_NCURSES
  89         WINDOW *window;
  90 #endif
  91 } ping_context_t;
  92
  93 static double  opt_interval   = 1.0;
  94 static int     opt_addrfamily = PING_DEF_AF;
  95 static char   *opt_srcaddr    = NULL;
  96 static char   *opt_device     = NULL;
  97 static char   *opt_filename   = NULL;
  98 static int     opt_count      = -1;
  99 static int     opt_send_ttl   = 64;
 100
 101 #if USE_NCURSES
 102 static WINDOW *main_win = NULL;
 103 #endif
 104
 105 static void sigint_handler (int signal)
 106 {
 107         /* Make compiler happy */
 108         signal = 0;
 109         /* Exit the loop */
 110         opt_count = 0;
 111 }
 112
 113 static ping_context_t *context_create (void)
 114 {
 115         ping_context_t *ret;
 116
 117         if ((ret = malloc (sizeof (ping_context_t))) == NULL)
 118                 return (NULL);
 119
 120         memset (ret, '\0', sizeof (ping_context_t));
 121
 122         ret->latency_min   = -1.0;
 123         ret->latency_max   = -1.0;
 124         ret->latency_total = 0.0;
 125         ret->latency_total_square = 0.0;
 126
 127 #if USE_NCURSES
 128         ret->window = NULL;
 129 #endif
 130
 131         return (ret);
 132 }
 133
 134 static void context_destroy (ping_context_t *context)
 135 {
 136         if (context == NULL)
 137                 return;
 138
 139 #if USE_NCURSES
 140         if (context->window != NULL)
 141         {
 142                 delwin (context->window);
 143                 context->window = NULL;
 144         }
 145 #endif
 146
 147         free (context);
 148 }
 149
 150 static void usage_exit (const char *name, int status)
 151 {
 152         int name_length;
 153
 154         name_length = (int) strlen (name);
 155
 156         fprintf (stderr, "Usage: %s [OPTIONS] "
 157                                 "-f filename | host [host [host ...]]\n"
 158
 159                         "\nAvailable options:\n"
 160                         "  -4|-6        force the use of IPv4 or IPv6\n"
 161                         "  -c count     number of ICMP packets to send\n"
 162                         "  -i interval  interval with which to send ICMP packets\n"
 163                         "  -t ttl       time to live for each ICMP packet\n"
 164                         "  -I srcaddr   source address\n"
 165                         "  -D device    outgoing interface name\n"
 166                         "  -f filename  filename to read hosts from\n"
 167
 168                         "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
 169                         "by Florian octo Forster <octo@verplant.org>\n"
 170                         "for contributions see `AUTHORS'\n",
 171                         name);
 172         exit (status);
 173 }
 174
 175 static int read_options (int argc, char **argv)
 176 {
 177         int optchar;
 178
 179         while (1)
 180         {
 181                 optchar = getopt (argc, argv, "46c:hi:I:t:f:D:");
 182
 183                 if (optchar == -1)
 184                         break;
 185
 186                 switch (optchar)
 187                 {
 188                         case '4':
 189                         case '6':
 190                                 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
 191                                 break;
 192
 193                         case 'c':
 194                                 {
 195                                         int new_count;
 196                                         new_count = atoi (optarg);
 197                                         if (new_count > 0)
 198                                                 opt_count = new_count;
 199                                         else
 200                                                 fprintf(stderr, "Ignoring invalid count: %s\n",
 201                                                                 optarg);
 202                                 }
 203                                 break;
 204
 205                         case 'f':
 206                                 {
 207                                         if (opt_filename != NULL)
 208                                                 free (opt_filename);
 209                                         opt_filename = strdup (optarg);
 210                                 }
 211                                 break;
 212
 213                         case 'i':
 214                                 {
 215                                         double new_interval;
 216                                         new_interval = atof (optarg);
 217                                         if (new_interval < 0.001)
 218                                                 fprintf (stderr, "Ignoring invalid interval: %s\n",
 219                                                                 optarg);
 220                                         else
 221                                                 opt_interval = new_interval;
 222                                 }
 223                                 break;
 224                         case 'I':
 225                                 {
 226                                         if (opt_srcaddr != NULL)
 227                                                 free (opt_srcaddr);
 228                                         opt_srcaddr = strdup (optarg);
 229                                 }
 230                                 break;
 231
 232                         case 'D':
 233                                 opt_device = optarg;
 234                                 break;
 235
 236                         case 't':
 237                         {
 238                                 int new_send_ttl;
 239                                 new_send_ttl = atoi (optarg);
 240                                 if ((new_send_ttl > 0) && (new_send_ttl < 256))
 241                                         opt_send_ttl = new_send_ttl;
 242                                 else
 243                                         fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
 244                                                         optarg);
 245                                 break;
 246                         }
 247
 248                         case 'h':
 249                                 usage_exit (argv[0], 0);
 250                                 break;
 251                         default:
 252                                 usage_exit (argv[0], 1);
 253                 }
 254         }
 255
 256         return (optind);
 257 }
 258
 259 static void print_host (pingobj_iter_t *iter)
 260 {
 261         double          latency;
 262         unsigned int    sequence;
 263         int             recv_ttl;
 264         size_t          buffer_len;
 265         size_t          data_len;
 266         ping_context_t *context;
 267
 268         latency = -1.0;
 269         buffer_len = sizeof (latency);
 270         ping_iterator_get_info (iter, PING_INFO_LATENCY,
 271                         &latency, &buffer_len);
 272
 273         sequence = 0;
 274         buffer_len = sizeof (sequence);
 275         ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
 276                         &sequence, &buffer_len);
 277
 278         recv_ttl = -1;
 279         buffer_len = sizeof (recv_ttl);
 280         ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
 281                         &recv_ttl, &buffer_len);
 282
 283         data_len = 0;
 284         ping_iterator_get_info (iter, PING_INFO_DATA,
 285                         NULL, &data_len);
 286
 287         context = (ping_context_t *) ping_iterator_get_context (iter);
 288
 289 #if USE_NCURSES
 290 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
 291 #else
 292 # define HOST_PRINTF(...) printf(__VA_ARGS__)
 293 #endif
 294
 295         context->req_sent++;
 296         if (latency > 0.0)
 297         {
 298                 context->req_rcvd++;
 299                 context->latency_total += latency;
 300                 context->latency_total_square += (latency * latency);
 301
 302                 if ((context->latency_max < 0.0) || (context->latency_max < latency))
 303                         context->latency_max = latency;
 304                 if ((context->latency_min < 0.0) || (context->latency_min > latency))
 305                         context->latency_min = latency;
 306
 307                 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i "
 308                                 "time=%.2f ms\n",
 309                                 data_len,
 310                                 context->host, context->addr,
 311                                 sequence, recv_ttl, latency);
 312         }
 313         else
 314         {
 315                 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
 316                                 context->host, context->addr,
 317                                 sequence);
 318         }
 319
 320 #if USE_NCURSES
 321         wrefresh (main_win);
 322         werase (context->window);
 323         box (context->window, 0, 0);
 324         mvwprintw (context->window, /* y = */ 0, /* x = */ 5,
 325                         " %s ping statistics ",
 326                         context->host);
 327         mvwprintw (context->window, /* y = */ 1, /* x = */ 2,
 328                         "%i packets transmitted, %i received, %.2f%% packet "
 329                         "loss, time %.1fms",
 330                         context->req_sent, context->req_rcvd,
 331                         100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
 332                         context->latency_total);
 333         if (context->req_rcvd != 0)
 334         {
 335                 double num_total;
 336                 double average;
 337                 double deviation;
 338
 339                 num_total = (double) context->req_rcvd;
 340
 341                 average = context->latency_total / num_total;
 342                 deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
 343                                 / (num_total * (num_total - 1.0)));
 344
 345                 mvwprintw (context->window, /* y = */ 2, /* x = */ 2,
 346                                 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
 347                                 context->latency_min,
 348                                 average,
 349                                 context->latency_max,
 350                                 deviation);
 351         }
 352         wrefresh (context->window);
 353 #endif
 354 }
 355
 356 static void time_normalize (struct timespec *ts)
 357 {
 358         while (ts->tv_nsec < 0)
 359         {
 360                 if (ts->tv_sec == 0)
 361                 {
 362                         ts->tv_nsec = 0;
 363                         return;
 364                 }
 365
 366                 ts->tv_sec  -= 1;
 367                 ts->tv_nsec += 1000000000;
 368         }
 369
 370         while (ts->tv_nsec >= 1000000000)
 371         {
 372                 ts->tv_sec  += 1;
 373                 ts->tv_nsec -= 1000000000;
 374         }
 375 }
 376
 377 static void time_calc (struct timespec *ts_dest, /* {{{ */
 378                 const struct timespec *ts_int,
 379                 const struct timeval  *tv_begin,
 380                 const struct timeval  *tv_end)
 381 {
 382         ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
 383         ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
 384         time_normalize (ts_dest);
 385
 386         /* Assure that `(begin + interval) > end'.
 387          * This may seem overly complicated, but `tv_sec' is of type `time_t'
 388          * which may be `unsigned. *sigh* */
 389         if ((tv_end->tv_sec > ts_dest->tv_sec)
 390                         || ((tv_end->tv_sec == ts_dest->tv_sec)
 391                                 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
 392         {
 393                 ts_dest->tv_sec  = 0;
 394                 ts_dest->tv_nsec = 0;
 395                 return;
 396         }
 397
 398         ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
 399         ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
 400         time_normalize (ts_dest);
 401 } /* }}} void time_calc */
 402
 403 static int print_header (pingobj_t *ping) /* {{{ */
 404 {
 405         pingobj_iter_t *iter;
 406         int i;
 407
 408 #if USE_NCURSES
 409         initscr ();
 410         cbreak ();
 411         noecho ();
 412 #endif
 413
 414         i = 0;
 415         for (iter = ping_iterator_get (ping);
 416                         iter != NULL;
 417                         iter = ping_iterator_next (iter))
 418         {
 419                 ping_context_t *context;
 420                 size_t buffer_size;
 421
 422                 context = context_create ();
 423
 424                 buffer_size = sizeof (context->host);
 425                 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
 426
 427                 buffer_size = sizeof (context->addr);
 428                 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
 429
 430                 buffer_size = 0;
 431                 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
 432
 433 #if USE_NCURSES
 434                 context->window = newwin (/* height = */ 4, COLS,
 435                                 /* start y = */ 4*i, /* start x = */ 0);
 436                 box (context->window, 0, 0);
 437                 mvwprintw (context->window, /* y = */ 0, /* x = */ 5,
 438                                 " %s ping statistics ",
 439                                 context->host);
 440                 wrefresh (context->window);
 441 #else /* !USE_NCURSES */
 442                 printf ("PING %s (%s) %zu bytes of data.\n",
 443                                 context->host, context->addr, buffer_size);
 444 #endif
 445
 446                 ping_iterator_set_context (iter, (void *) context);
 447
 448                 i++;
 449         }
 450
 451 #if USE_NCURSES
 452         delwin (main_win);
 453         main_win = newwin (LINES - 4*i, COLS, 4*i, 0);
 454         scrollok (main_win, TRUE);
 455 #endif
 456
 457         return (0);
 458 } /* }}} int print_header */
 459
 460 static int print_footer (pingobj_t *ping)
 461 {
 462         pingobj_iter_t *iter;
 463
 464 #if USE_NCURSES
 465         endwin ();
 466 #endif
 467
 468         for (iter = ping_iterator_get (ping);
 469                         iter != NULL;
 470                         iter = ping_iterator_next (iter))
 471         {
 472                 ping_context_t *context;
 473
 474                 context = ping_iterator_get_context (iter);
 475
 476                 printf ("\n--- %s ping statistics ---\n"
 477                                 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
 478                                 context->host, context->req_sent, context->req_rcvd,
 479                                 100.0 * (context->req_sent - context->req_rcvd) / ((double) context->req_sent),
 480                                 context->latency_total);
 481
 482                 if (context->req_rcvd != 0)
 483                 {
 484                         double num_total;
 485                         double average;
 486                         double deviation;
 487
 488                         num_total = (double) context->req_rcvd;
 489
 490                         average = context->latency_total / num_total;
 491                         deviation = sqrt (((num_total * context->latency_total_square) - (context->latency_total * context->latency_total))
 492                                         / (num_total * (num_total - 1.0)));
 493
 494                         printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
 495                                         context->latency_min,
 496                                         average,
 497                                         context->latency_max,
 498                                         deviation);
 499                 }
 500
 501                 ping_iterator_set_context (iter, NULL);
 502                 context_destroy (context);
 503         }
 504
 505         return (0);
 506 } /* }}} int print_footer */
 507
 508 int main (int argc, char **argv) /* {{{ */
 509 {
 510         pingobj_t      *ping;
 511         pingobj_iter_t *iter;
 512
 513         struct sigaction sigint_action;
 514
 515         struct timeval  tv_begin;
 516         struct timeval  tv_end;
 517         struct timespec ts_wait;
 518         struct timespec ts_int;
 519
 520         int optind;
 521         int i;
 522         int status;
 523 #if _POSIX_SAVED_IDS
 524         uid_t saved_set_uid;
 525
 526         /* Save the old effective user id */
 527         saved_set_uid = geteuid ();
 528         /* Set the effective user ID to the real user ID without changing the
 529          * saved set-user ID */
 530         status = seteuid (getuid ());
 531         if (status != 0)
 532         {
 533                 fprintf (stderr, "Temporarily dropping privileges "
 534                                 "failed: %s\n", strerror (errno));
 535                 exit (EXIT_FAILURE);
 536         }
 537 #endif
 538
 539         optind = read_options (argc, argv);
 540
 541 #if !_POSIX_SAVED_IDS
 542         /* Cannot temporarily drop privileges -> reject every file but "-". */
 543         if ((opt_filename != NULL)
 544                         && (strcmp ("-", opt_filename) != 0)
 545                         && (getuid () != geteuid ()))
 546         {
 547                 fprintf (stderr, "Your real and effective user IDs don't "
 548                                 "match. Reading from a file (option '-f')\n"
 549                                 "is therefore too risky. You can still read "
 550                                 "from STDIN using '-f -' if you like.\n"
 551                                 "Sorry.\n");
 552                 exit (EXIT_FAILURE);
 553         }
 554 #endif
 555
 556         if ((optind >= argc) && (opt_filename == NULL)) {
 557                 usage_exit (argv[0], 1);
 558         }
 559
 560         if ((ping = ping_construct ()) == NULL)
 561         {
 562                 fprintf (stderr, "ping_construct failed\n");
 563                 return (1);
 564         }
 565
 566         if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
 567         {
 568                 fprintf (stderr, "Setting TTL to %i failed: %s\n",
 569                                 opt_send_ttl, ping_get_error (ping));
 570         }
 571
 572         {
 573                 double temp_sec;
 574                 double temp_nsec;
 575
 576                 temp_nsec = modf (opt_interval, &temp_sec);
 577                 ts_int.tv_sec  = (time_t) temp_sec;
 578                 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
 579
 580                 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
 581         }
 582
 583         if (opt_addrfamily != PING_DEF_AF)
 584                 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
 585
 586         if (opt_srcaddr != NULL)
 587         {
 588                 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
 589                 {
 590                         fprintf (stderr, "Setting source address failed: %s\n",
 591                                         ping_get_error (ping));
 592                 }
 593         }
 594
 595         if (opt_device != NULL)
 596         {
 597                 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
 598                 {
 599                         fprintf (stderr, "Setting device failed: %s\n",
 600                                         ping_get_error (ping));
 601                 }
 602         }
 603
 604         if (opt_filename != NULL)
 605         {
 606                 FILE *infile;
 607                 char line[256];
 608                 char host[256];
 609
 610                 if (strcmp (opt_filename, "-") == 0)
 611                         /* Open STDIN */
 612                         infile = fdopen(0, "r");
 613                 else
 614                         infile = fopen(opt_filename, "r");
 615
 616                 if (infile == NULL)
 617                 {
 618                         fprintf (stderr, "Opening %s failed: %s\n",
 619                                         (strcmp (opt_filename, "-") == 0)
 620                                         ? "STDIN" : opt_filename,
 621                                         strerror(errno));
 622                         return (1);
 623                 }
 624
 625 #if _POSIX_SAVED_IDS
 626                 /* Regain privileges */
 627                 status = seteuid (saved_set_uid);
 628                 if (status != 0)
 629                 {
 630                         fprintf (stderr, "Temporarily re-gaining privileges "
 631                                         "failed: %s\n", strerror (errno));
 632                         exit (EXIT_FAILURE);
 633                 }
 634 #endif
 635
 636                 while (fgets(line, sizeof(line), infile))
 637                 {
 638                         /* Strip whitespace */
 639                         if (sscanf(line, "%s", host) != 1)
 640                                 continue;
 641
 642                         if ((host[0] == 0) || (host[0] == '#'))
 643                                 continue;
 644
 645                         if (ping_host_add(ping, host) < 0)
 646                         {
 647                                 const char *errmsg = ping_get_error (ping);
 648
 649                                 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
 650                                 continue;
 651                         }
 652                 }
 653
 654 #if _POSIX_SAVED_IDS
 655                 /* Drop privileges */
 656                 status = seteuid (getuid ());
 657                 if (status != 0)
 658                 {
 659                         fprintf (stderr, "Temporarily dropping privileges "
 660                                         "failed: %s\n", strerror (errno));
 661                         exit (EXIT_FAILURE);
 662                 }
 663 #endif
 664
 665                 fclose(infile);
 666         }
 667
 668 #if _POSIX_SAVED_IDS
 669         /* Regain privileges */
 670         status = seteuid (saved_set_uid);
 671         if (status != 0)
 672         {
 673                 fprintf (stderr, "Temporarily re-gaining privileges "
 674                                 "failed: %s\n", strerror (errno));
 675                 exit (EXIT_FAILURE);
 676         }
 677 #endif
 678
 679         for (i = optind; i < argc; i++)
 680         {
 681                 if (ping_host_add (ping, argv[i]) < 0)
 682                 {
 683                         const char *errmsg = ping_get_error (ping);
 684
 685                         fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
 686                         continue;
 687                 }
 688         }
 689
 690         /* Permanently drop root privileges if we're setuid-root. */
 691         status = setuid (getuid ());
 692         if (status != 0)
 693         {
 694                 fprintf (stderr, "Dropping privileges failed: %s\n",
 695                                 strerror (errno));
 696                 exit (EXIT_FAILURE);
 697         }
 698
 699 #if _POSIX_SAVED_IDS
 700         saved_set_uid = (uid_t) -1;
 701 #endif
 702
 703         print_header (ping);
 704
 705         if (i == 0)
 706                 return (1);
 707
 708         memset (&sigint_action, '\0', sizeof (sigint_action));
 709         sigint_action.sa_handler = sigint_handler;
 710         if (sigaction (SIGINT, &sigint_action, NULL) < 0)
 711         {
 712                 perror ("sigaction");
 713                 return (1);
 714         }
 715
 716         while (opt_count != 0)
 717         {
 718                 int status;
 719
 720                 if (gettimeofday (&tv_begin, NULL) < 0)
 721                 {
 722                         perror ("gettimeofday");
 723                         return (1);
 724                 }
 725
 726                 if (ping_send (ping) < 0)
 727                 {
 728                         fprintf (stderr, "ping_send failed: %s\n",
 729                                         ping_get_error (ping));
 730                         return (1);
 731                 }
 732
 733                 for (iter = ping_iterator_get (ping);
 734                                 iter != NULL;
 735                                 iter = ping_iterator_next (iter))
 736                 {
 737                         print_host (iter);
 738                 }
 739                 fflush (stdout);
 740
 741                 /* Don't sleep in the last iteration */
 742                 if (opt_count == 1)
 743                         break;
 744
 745                 if (gettimeofday (&tv_end, NULL) < 0)
 746                 {
 747                         perror ("gettimeofday");
 748                         return (1);
 749                 }
 750
 751                 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
 752
 753                 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
 754                 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
 755                 {
 756                         if (errno != EINTR)
 757                         {
 758                                 perror ("nanosleep");
 759                                 break;
 760                         }
 761                         else if (opt_count == 0)
 762                         {
 763                                 /* sigint */
 764                                 break;
 765                         }
 766                 }
 767
 768                 if (opt_count > 0)
 769                         opt_count--;
 770         } /* while (opt_count != 0) */
 771
 772         print_footer (ping);
 773
 774         ping_destroy (ping);
 775
 776         return (0);
 777 } /* }}} int main */
 778
 779 /* vim: set fdm=marker : */