2 * Object oriented C module to send ICMP and ICMPv6 `echo's.
3 * Copyright (C) 2006-2010 Florian octo Forster <octo at verplant.org>
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
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.
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
29 # include <inttypes.h>
33 # error "You don't have the standard C99 header files installed"
34 #endif /* STDC_HEADERS */
44 #if TIME_WITH_SYS_TIME
45 # include <sys/time.h>
49 # include <sys/time.h>
56 # include <sys/socket.h>
59 # include <netinet/in.h>
62 # include <netinet/ip.h>
66 # include <netdb.h> /* NI_MAXHOST */
74 #include <sys/types.h>
78 # define NCURSES_OPAQUE 1
81 # define OPING_GREEN 1
82 # define OPING_YELLOW 2
88 #ifndef _POSIX_SAVED_IDS
89 # define _POSIX_SAVED_IDS 0
92 typedef struct ping_context
94 char host[NI_MAXHOST];
95 char addr[NI_MAXHOST];
103 double latency_total;
104 double latency_total_square;
111 static double opt_interval = 1.0;
112 static int opt_addrfamily = PING_DEF_AF;
113 static char *opt_srcaddr = NULL;
114 static char *opt_device = NULL;
115 static char *opt_filename = NULL;
116 static int opt_count = -1;
117 static int opt_send_ttl = 64;
118 static uint8_t opt_send_qos = 0;
120 static int host_num = 0;
123 static WINDOW *main_win = NULL;
126 static void sigint_handler (int signal) /* {{{ */
128 /* Make compiler happy */
132 } /* }}} void sigint_handler */
134 static ping_context_t *context_create (void) /* {{{ */
138 if ((ret = malloc (sizeof (ping_context_t))) == NULL)
141 memset (ret, '\0', sizeof (ping_context_t));
143 ret->latency_min = -1.0;
144 ret->latency_max = -1.0;
145 ret->latency_total = 0.0;
146 ret->latency_total_square = 0.0;
153 } /* }}} ping_context_t *context_create */
155 static void context_destroy (ping_context_t *context) /* {{{ */
161 if (context->window != NULL)
163 delwin (context->window);
164 context->window = NULL;
169 } /* }}} void context_destroy */
171 static double context_get_average (ping_context_t *ctx) /* {{{ */
178 if (ctx->req_rcvd < 1)
181 num_total = (double) ctx->req_rcvd;
182 return (ctx->latency_total / num_total);
183 } /* }}} double context_get_average */
185 static double context_get_stddev (ping_context_t *ctx) /* {{{ */
192 if (ctx->req_rcvd < 1)
194 else if (ctx->req_rcvd < 2)
197 num_total = (double) ctx->req_rcvd;
198 return (sqrt (((num_total * ctx->latency_total_square)
199 - (ctx->latency_total * ctx->latency_total))
200 / (num_total * (num_total - 1.0))));
201 } /* }}} double context_get_stddev */
203 static double context_get_packet_loss (const ping_context_t *ctx) /* {{{ */
208 if (ctx->req_sent < 1)
211 return (100.0 * (ctx->req_sent - ctx->req_rcvd)
212 / ((double) ctx->req_sent));
213 } /* }}} double context_get_packet_loss */
215 static int ping_initialize_contexts (pingobj_t *ping) /* {{{ */
217 pingobj_iter_t *iter;
224 for (iter = ping_iterator_get (ping);
226 iter = ping_iterator_next (iter))
228 ping_context_t *context;
231 context = context_create ();
232 context->index = index;
234 buffer_size = sizeof (context->host);
235 ping_iterator_get_info (iter, PING_INFO_HOSTNAME, context->host, &buffer_size);
237 buffer_size = sizeof (context->addr);
238 ping_iterator_get_info (iter, PING_INFO_ADDRESS, context->addr, &buffer_size);
240 ping_iterator_set_context (iter, (void *) context);
246 } /* }}} int ping_initialize_contexts */
248 static void usage_exit (const char *name, int status) /* {{{ */
252 name_length = (int) strlen (name);
254 fprintf (stderr, "Usage: %s [OPTIONS] "
255 "-f filename | host [host [host ...]]\n"
257 "\nAvailable options:\n"
258 " -4|-6 force the use of IPv4 or IPv6\n"
259 " -c count number of ICMP packets to send\n"
260 " -i interval interval with which to send ICMP packets\n"
261 " -t ttl time to live for each ICMP packet\n"
262 " -Q qos Quality of Service (QoS) of outgoing packets\n"
263 " Use \"-Q help\" for a list of valid options.\n"
264 " -I srcaddr source address\n"
265 " -D device outgoing interface name\n"
266 " -f filename filename to read hosts from\n"
268 "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
269 "by Florian octo Forster <octo@verplant.org>\n"
270 "for contributions see `AUTHORS'\n",
273 } /* }}} void usage_exit */
275 static void usage_tos_exit (const char *arg, int status) /* {{{ */
278 fprintf (stderr, "Invalid QoS argument: \"%s\"\n\n", arg);
280 fprintf (stderr, "Valid QoS arguments (option \"-Q\") are:\n"
282 " Differentiated Services (IPv4 and IPv6, RFC 2474)\n"
284 " be Best Effort (BE, default PHB).\n"
285 " ef Expedited Forwarding (EF) PHB group (RFC 3246).\n"
286 " (low delay, low loss, low jitter)\n"
287 " af[1-4][1-3] Assured Forwarding (AF) PHB group (RFC 2597).\n"
288 " For example: \"af12\" (class 1, precedence 2)\n"
289 " cs[0-7] Class Selector (CS) PHB group (RFC 2474).\n"
290 " For example: \"cs1\" (priority traffic)\n"
292 " Type of Service (IPv4, RFC 1349, obsolete)\n"
294 " lowdelay (%#04x) minimize delay\n"
295 " throughput (%#04x) maximize throughput\n"
296 " reliability (%#04x) maximize reliability\n"
297 " mincost (%#04x) minimize monetary cost\n"
299 " Specify manually\n"
301 " 0x00 - 0xff Hexadecimal numeric specification.\n"
302 " 0 - 255 Decimal numeric specification.\n"
304 (unsigned int) IPTOS_LOWDELAY,
305 (unsigned int) IPTOS_THROUGHPUT,
306 (unsigned int) IPTOS_RELIABILITY,
307 (unsigned int) IPTOS_MINCOST);
310 } /* }}} void usage_tos_exit */
312 static int set_opt_send_qos (const char *opt) /* {{{ */
317 if (strcasecmp ("help", opt) == 0)
318 usage_tos_exit (/* arg = */ NULL, /* status = */ EXIT_SUCCESS);
319 /* DiffServ (RFC 2474): */
320 /* - Best effort (BE) */
321 else if (strcasecmp ("be", opt) == 0)
323 /* - Expedited Forwarding (EF, RFC 3246) */
324 else if (strcasecmp ("ef", opt) == 0)
325 opt_send_qos = 0xB8; /* == 0x2E << 2 */
326 /* - Assured Forwarding (AF, RFC 2597) */
327 else if ((strncasecmp ("af", opt, strlen ("af")) == 0)
328 && (strlen (opt) == 4))
334 /* There are four classes, AF1x, AF2x, AF3x, and AF4x. */
337 else if (opt[2] == '2')
339 else if (opt[2] == '3')
341 else if (opt[2] == '4')
344 usage_tos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
346 /* In each class, there are three precedences, AFx1, AFx2, and AFx3 */
349 else if (opt[3] == '2')
351 else if (opt[3] == '3')
354 usage_tos_exit (/* arg = */ opt, /* status = */ EXIT_SUCCESS);
356 dscp = (8 * class) + (2 * prec);
357 /* The lower two bits are used for Explicit Congestion Notification (ECN) */
358 opt_send_qos = dscp << 2;
360 /* - Class Selector (CS) */
361 else if ((strncasecmp ("cs", opt, strlen ("cs")) == 0)
362 && (strlen (opt) == 3))
366 if ((opt[2] < '0') || (opt[2] > '7'))
367 usage_tos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
369 /* Not exactly legal by the C standard, but I don't know of any
370 * system not supporting this hack. */
371 class = ((uint8_t) opt[2]) - ((uint8_t) '0');
372 opt_send_qos = class << 5;
374 /* Type of Service (RFC 1349) */
375 else if (strcasecmp ("lowdelay", opt) == 0)
376 opt_send_qos = IPTOS_LOWDELAY;
377 else if (strcasecmp ("throughput", opt) == 0)
378 opt_send_qos = IPTOS_THROUGHPUT;
379 else if (strcasecmp ("reliability", opt) == 0)
380 opt_send_qos = IPTOS_RELIABILITY;
381 else if (strcasecmp ("mincost", opt) == 0)
382 opt_send_qos = IPTOS_MINCOST;
391 value = strtoul (opt, &endptr, /* base = */ 0);
392 if ((errno != 0) || (endptr == opt)
393 || (endptr == NULL) || (*endptr != 0)
395 usage_tos_exit (/* arg = */ opt, /* status = */ EXIT_FAILURE);
397 opt_send_qos = (uint8_t) value;
401 } /* }}} int set_opt_send_qos */
403 static int read_options (int argc, char **argv) /* {{{ */
409 optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:");
418 opt_addrfamily = (optchar == '4') ? AF_INET : AF_INET6;
424 new_count = atoi (optarg);
426 opt_count = new_count;
428 fprintf(stderr, "Ignoring invalid count: %s\n",
435 if (opt_filename != NULL)
437 opt_filename = strdup (optarg);
444 new_interval = atof (optarg);
445 if (new_interval < 0.001)
446 fprintf (stderr, "Ignoring invalid interval: %s\n",
449 opt_interval = new_interval;
454 if (opt_srcaddr != NULL)
456 opt_srcaddr = strdup (optarg);
467 new_send_ttl = atoi (optarg);
468 if ((new_send_ttl > 0) && (new_send_ttl < 256))
469 opt_send_ttl = new_send_ttl;
471 fprintf (stderr, "Ignoring invalid TTL argument: %s\n",
477 set_opt_send_qos (optarg);
481 usage_exit (argv[0], 0);
484 usage_exit (argv[0], 1);
489 } /* }}} read_options */
491 static void time_normalize (struct timespec *ts) /* {{{ */
493 while (ts->tv_nsec < 0)
502 ts->tv_nsec += 1000000000;
505 while (ts->tv_nsec >= 1000000000)
508 ts->tv_nsec -= 1000000000;
510 } /* }}} void time_normalize */
512 static void time_calc (struct timespec *ts_dest, /* {{{ */
513 const struct timespec *ts_int,
514 const struct timeval *tv_begin,
515 const struct timeval *tv_end)
517 ts_dest->tv_sec = tv_begin->tv_sec + ts_int->tv_sec;
518 ts_dest->tv_nsec = (tv_begin->tv_usec * 1000) + ts_int->tv_nsec;
519 time_normalize (ts_dest);
521 /* Assure that `(begin + interval) > end'.
522 * This may seem overly complicated, but `tv_sec' is of type `time_t'
523 * which may be `unsigned. *sigh* */
524 if ((tv_end->tv_sec > ts_dest->tv_sec)
525 || ((tv_end->tv_sec == ts_dest->tv_sec)
526 && ((tv_end->tv_usec * 1000) > ts_dest->tv_nsec)))
529 ts_dest->tv_nsec = 0;
533 ts_dest->tv_sec = ts_dest->tv_sec - tv_end->tv_sec;
534 ts_dest->tv_nsec = ts_dest->tv_nsec - (tv_end->tv_usec * 1000);
535 time_normalize (ts_dest);
536 } /* }}} void time_calc */
539 static int update_stats_from_context (ping_context_t *ctx) /* {{{ */
541 if ((ctx == NULL) || (ctx->window == NULL))
544 werase (ctx->window);
546 box (ctx->window, 0, 0);
547 wattron (ctx->window, A_BOLD);
548 mvwprintw (ctx->window, /* y = */ 0, /* x = */ 5,
550 wattroff (ctx->window, A_BOLD);
551 wprintw (ctx->window, "ping statistics ");
552 mvwprintw (ctx->window, /* y = */ 1, /* x = */ 2,
553 "%i packets transmitted, %i received, %.2f%% packet "
555 ctx->req_sent, ctx->req_rcvd,
556 context_get_packet_loss (ctx),
558 if (ctx->req_rcvd != 0)
563 average = context_get_average (ctx);
564 deviation = context_get_stddev (ctx);
566 mvwprintw (ctx->window, /* y = */ 2, /* x = */ 2,
567 "rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms",
574 wrefresh (ctx->window);
577 } /* }}} int update_stats_from_context */
579 static int on_resize (pingobj_t *ping) /* {{{ */
581 pingobj_iter_t *iter;
586 getmaxyx (stdscr, height, width);
587 if ((height < 1) || (width < 1))
590 main_win_height = height - (4 * host_num);
591 wresize (main_win, main_win_height, /* width = */ width);
592 /* Allow scrolling */
593 scrollok (main_win, TRUE);
594 /* wsetscrreg (main_win, 0, main_win_height - 1); */
595 /* Allow hardware accelerated scrolling. */
596 idlok (main_win, TRUE);
599 for (iter = ping_iterator_get (ping);
601 iter = ping_iterator_next (iter))
603 ping_context_t *context;
605 context = ping_iterator_get_context (iter);
609 if (context->window != NULL)
611 delwin (context->window);
612 context->window = NULL;
614 context->window = newwin (/* height = */ 4,
616 /* y = */ main_win_height + (4 * context->index),
623 static int check_resize (pingobj_t *ping) /* {{{ */
629 int key = wgetch (stdscr);
632 else if (key == KEY_RESIZE)
637 return (on_resize (ping));
640 } /* }}} int check_resize */
642 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
644 pingobj_iter_t *iter;
652 nodelay (stdscr, TRUE);
654 getmaxyx (stdscr, height, width);
655 if ((height < 1) || (width < 1))
658 if (has_colors () == TRUE)
661 init_pair (OPING_GREEN, COLOR_GREEN, /* default = */ 0);
662 init_pair (OPING_YELLOW, COLOR_YELLOW, /* default = */ 0);
663 init_pair (OPING_RED, COLOR_RED, /* default = */ 0);
666 main_win_height = height - (4 * host_num);
667 main_win = newwin (/* height = */ main_win_height,
669 /* y = */ 0, /* x = */ 0);
670 /* Allow scrolling */
671 scrollok (main_win, TRUE);
672 /* wsetscrreg (main_win, 0, main_win_height - 1); */
673 /* Allow hardware accelerated scrolling. */
674 idlok (main_win, TRUE);
675 wmove (main_win, /* y = */ main_win_height - 1, /* x = */ 0);
678 for (iter = ping_iterator_get (ping);
680 iter = ping_iterator_next (iter))
682 ping_context_t *context;
684 context = ping_iterator_get_context (iter);
688 if (context->window != NULL)
690 delwin (context->window);
691 context->window = NULL;
693 context->window = newwin (/* height = */ 4,
695 /* y = */ main_win_height + (4 * context->index),
700 /* Don't know what good this does exactly, but without this code
701 * "check_resize" will be called right after startup and *somehow*
702 * this leads to display errors. If we purge all initial characters
703 * here, the problem goes away. "wgetch" is non-blocking due to
704 * "nodelay" (see above). */
705 while (wgetch (stdscr) != ERR)
707 /* eat up characters */;
711 } /* }}} int pre_loop_hook */
713 static int pre_sleep_hook (pingobj_t *ping) /* {{{ */
715 return (check_resize (ping));
716 } /* }}} int pre_sleep_hook */
718 static int post_sleep_hook (pingobj_t *ping) /* {{{ */
720 return (check_resize (ping));
721 } /* }}} int pre_sleep_hook */
722 #else /* if !USE_NCURSES */
723 static int pre_loop_hook (pingobj_t *ping) /* {{{ */
725 pingobj_iter_t *iter;
727 for (iter = ping_iterator_get (ping);
729 iter = ping_iterator_next (iter))
734 ctx = ping_iterator_get_context (iter);
739 ping_iterator_get_info (iter, PING_INFO_DATA, NULL, &buffer_size);
741 printf ("PING %s (%s) %zu bytes of data.\n",
742 ctx->host, ctx->addr, buffer_size);
746 } /* }}} int pre_loop_hook */
748 static int pre_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
753 } /* }}} int pre_sleep_hook */
755 static int post_sleep_hook (__attribute__((unused)) pingobj_t *ping) /* {{{ */
758 } /* }}} int post_sleep_hook */
761 static void update_host_hook (pingobj_iter_t *iter, /* {{{ */
765 unsigned int sequence;
770 ping_context_t *context;
773 buffer_len = sizeof (latency);
774 ping_iterator_get_info (iter, PING_INFO_LATENCY,
775 &latency, &buffer_len);
778 buffer_len = sizeof (sequence);
779 ping_iterator_get_info (iter, PING_INFO_SEQUENCE,
780 &sequence, &buffer_len);
783 buffer_len = sizeof (recv_ttl);
784 ping_iterator_get_info (iter, PING_INFO_RECV_TTL,
785 &recv_ttl, &buffer_len);
788 buffer_len = sizeof (recv_tos);
789 ping_iterator_get_info (iter, PING_INFO_RECV_TOS,
790 &recv_tos, &buffer_len);
793 ping_iterator_get_info (iter, PING_INFO_DATA,
796 context = (ping_context_t *) ping_iterator_get_context (iter);
799 # define HOST_PRINTF(...) wprintw(main_win, __VA_ARGS__)
801 # define HOST_PRINTF(...) printf(__VA_ARGS__)
808 context->latency_total += latency;
809 context->latency_total_square += (latency * latency);
811 if ((context->latency_max < 0.0) || (context->latency_max < latency))
812 context->latency_max = latency;
813 if ((context->latency_min < 0.0) || (context->latency_min > latency))
814 context->latency_min = latency;
817 if (has_colors () == TRUE)
819 int color = OPING_GREEN;
820 double average = context_get_average (context);
821 double stddev = context_get_stddev (context);
823 if ((latency < (average - (2 * stddev)))
824 || (latency > (average + (2 * stddev))))
826 else if ((latency < (average - stddev))
827 || (latency > (average + stddev)))
828 color = OPING_YELLOW;
830 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i tos=0x%02"PRIx8
832 data_len, context->host, context->addr,
833 sequence, recv_ttl, recv_tos);
834 wattron (main_win, COLOR_PAIR(color));
835 HOST_PRINTF ("%.2f", latency);
836 wattroff (main_win, COLOR_PAIR(color));
837 HOST_PRINTF (" ms\n");
842 HOST_PRINTF ("%zu bytes from %s (%s): icmp_seq=%u ttl=%i tos=0x%02"PRIx8
845 context->host, context->addr,
846 sequence, recv_ttl, recv_tos, latency);
854 if (has_colors () == TRUE)
856 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u ",
857 context->host, context->addr,
859 wattron (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
860 HOST_PRINTF ("timeout");
861 wattroff (main_win, COLOR_PAIR(OPING_RED) | A_BOLD);
867 HOST_PRINTF ("echo reply from %s (%s): icmp_seq=%u timeout\n",
868 context->host, context->addr,
876 update_stats_from_context (context);
879 } /* }}} void update_host_hook */
881 static int post_loop_hook (pingobj_t *ping) /* {{{ */
883 pingobj_iter_t *iter;
889 for (iter = ping_iterator_get (ping);
891 iter = ping_iterator_next (iter))
893 ping_context_t *context;
895 context = ping_iterator_get_context (iter);
897 printf ("\n--- %s ping statistics ---\n"
898 "%i packets transmitted, %i received, %.2f%% packet loss, time %.1fms\n",
899 context->host, context->req_sent, context->req_rcvd,
900 context_get_packet_loss (context),
901 context->latency_total);
903 if (context->req_rcvd != 0)
908 average = context_get_average (context);
909 deviation = context_get_stddev (context);
911 printf ("rtt min/avg/max/sdev = %.3f/%.3f/%.3f/%.3f ms\n",
912 context->latency_min,
914 context->latency_max,
918 ping_iterator_set_context (iter, NULL);
919 context_destroy (context);
923 } /* }}} int post_loop_hook */
925 int main (int argc, char **argv) /* {{{ */
928 pingobj_iter_t *iter;
930 struct sigaction sigint_action;
932 struct timeval tv_begin;
933 struct timeval tv_end;
934 struct timespec ts_wait;
935 struct timespec ts_int;
943 /* Save the old effective user id */
944 saved_set_uid = geteuid ();
945 /* Set the effective user ID to the real user ID without changing the
946 * saved set-user ID */
947 status = seteuid (getuid ());
950 fprintf (stderr, "Temporarily dropping privileges "
951 "failed: %s\n", strerror (errno));
956 optind = read_options (argc, argv);
958 #if !_POSIX_SAVED_IDS
959 /* Cannot temporarily drop privileges -> reject every file but "-". */
960 if ((opt_filename != NULL)
961 && (strcmp ("-", opt_filename) != 0)
962 && (getuid () != geteuid ()))
964 fprintf (stderr, "Your real and effective user IDs don't "
965 "match. Reading from a file (option '-f')\n"
966 "is therefore too risky. You can still read "
967 "from STDIN using '-f -' if you like.\n"
973 if ((optind >= argc) && (opt_filename == NULL)) {
974 usage_exit (argv[0], 1);
977 if ((ping = ping_construct ()) == NULL)
979 fprintf (stderr, "ping_construct failed\n");
983 if (ping_setopt (ping, PING_OPT_TTL, &opt_send_ttl) != 0)
985 fprintf (stderr, "Setting TTL to %i failed: %s\n",
986 opt_send_ttl, ping_get_error (ping));
989 if (ping_setopt (ping, PING_OPT_TOS, &opt_send_qos) != 0)
991 fprintf (stderr, "Setting TOS to %i failed: %s\n",
992 opt_send_qos, ping_get_error (ping));
999 temp_nsec = modf (opt_interval, &temp_sec);
1000 ts_int.tv_sec = (time_t) temp_sec;
1001 ts_int.tv_nsec = (long) (temp_nsec * 1000000000L);
1003 /* printf ("ts_int = %i.%09li\n", (int) ts_int.tv_sec, ts_int.tv_nsec); */
1006 if (opt_addrfamily != PING_DEF_AF)
1007 ping_setopt (ping, PING_OPT_AF, (void *) &opt_addrfamily);
1009 if (opt_srcaddr != NULL)
1011 if (ping_setopt (ping, PING_OPT_SOURCE, (void *) opt_srcaddr) != 0)
1013 fprintf (stderr, "Setting source address failed: %s\n",
1014 ping_get_error (ping));
1018 if (opt_device != NULL)
1020 if (ping_setopt (ping, PING_OPT_DEVICE, (void *) opt_device) != 0)
1022 fprintf (stderr, "Setting device failed: %s\n",
1023 ping_get_error (ping));
1027 if (opt_filename != NULL)
1033 if (strcmp (opt_filename, "-") == 0)
1035 infile = fdopen(0, "r");
1037 infile = fopen(opt_filename, "r");
1041 fprintf (stderr, "Opening %s failed: %s\n",
1042 (strcmp (opt_filename, "-") == 0)
1043 ? "STDIN" : opt_filename,
1048 #if _POSIX_SAVED_IDS
1049 /* Regain privileges */
1050 status = seteuid (saved_set_uid);
1053 fprintf (stderr, "Temporarily re-gaining privileges "
1054 "failed: %s\n", strerror (errno));
1055 exit (EXIT_FAILURE);
1059 while (fgets(line, sizeof(line), infile))
1061 /* Strip whitespace */
1062 if (sscanf(line, "%s", host) != 1)
1065 if ((host[0] == 0) || (host[0] == '#'))
1068 if (ping_host_add(ping, host) < 0)
1070 const char *errmsg = ping_get_error (ping);
1072 fprintf (stderr, "Adding host `%s' failed: %s\n", host, errmsg);
1081 #if _POSIX_SAVED_IDS
1082 /* Drop privileges */
1083 status = seteuid (getuid ());
1086 fprintf (stderr, "Temporarily dropping privileges "
1087 "failed: %s\n", strerror (errno));
1088 exit (EXIT_FAILURE);
1095 #if _POSIX_SAVED_IDS
1096 /* Regain privileges */
1097 status = seteuid (saved_set_uid);
1100 fprintf (stderr, "Temporarily re-gaining privileges "
1101 "failed: %s\n", strerror (errno));
1102 exit (EXIT_FAILURE);
1106 for (i = optind; i < argc; i++)
1108 if (ping_host_add (ping, argv[i]) < 0)
1110 const char *errmsg = ping_get_error (ping);
1112 fprintf (stderr, "Adding host `%s' failed: %s\n", argv[i], errmsg);
1121 /* Permanently drop root privileges if we're setuid-root. */
1122 status = setuid (getuid ());
1125 fprintf (stderr, "Dropping privileges failed: %s\n",
1127 exit (EXIT_FAILURE);
1130 #if _POSIX_SAVED_IDS
1131 saved_set_uid = (uid_t) -1;
1134 ping_initialize_contexts (ping);
1139 memset (&sigint_action, '\0', sizeof (sigint_action));
1140 sigint_action.sa_handler = sigint_handler;
1141 if (sigaction (SIGINT, &sigint_action, NULL) < 0)
1143 perror ("sigaction");
1147 pre_loop_hook (ping);
1149 while (opt_count != 0)
1154 if (gettimeofday (&tv_begin, NULL) < 0)
1156 perror ("gettimeofday");
1160 if (ping_send (ping) < 0)
1162 fprintf (stderr, "ping_send failed: %s\n",
1163 ping_get_error (ping));
1168 for (iter = ping_iterator_get (ping);
1170 iter = ping_iterator_next (iter))
1172 update_host_hook (iter, index);
1176 pre_sleep_hook (ping);
1178 /* Don't sleep in the last iteration */
1182 if (gettimeofday (&tv_end, NULL) < 0)
1184 perror ("gettimeofday");
1188 time_calc (&ts_wait, &ts_int, &tv_begin, &tv_end);
1190 /* printf ("Sleeping for %i.%09li seconds\n", (int) ts_wait.tv_sec, ts_wait.tv_nsec); */
1191 while ((status = nanosleep (&ts_wait, &ts_wait)) != 0)
1195 perror ("nanosleep");
1198 else if (opt_count == 0)
1205 post_sleep_hook (ping);
1209 } /* while (opt_count != 0) */
1211 post_loop_hook (ping);
1213 ping_destroy (ping);
1216 } /* }}} int main */
1218 /* vim: set fdm=marker : */