oping: Implement the "-Z" option.

[liboping.git] / src / oping.c

diff --git a/src/oping.c b/src/oping.c
index 5b75dae..0916788 100644 (file)
--- a/src/oping.c
+++ b/src/oping.c
@@ -121,6 +121,7 @@ static char   *opt_filename   = NULL;
 static int     opt_count      = -1;
 static int     opt_send_ttl   = 64;
 static uint8_t opt_send_qos   = 0;
+static double  opt_exit_status_threshold = 1.0;
 
 static int host_num = 0;
 
@@ -265,6 +266,8 @@ static void usage_exit (const char *name, int status) /* {{{ */
                        "  -I srcaddr   source address\n"
                        "  -D device    outgoing interface name\n"
                        "  -f filename  filename to read hosts from\n"
+                       "  -Z percent   Exit with non-zero exit status if more than this percentage of\n"
+                       "               probes timed out. (default: never)\n"
 
                        "\noping "PACKAGE_VERSION", http://verplant.org/liboping/\n"
                        "by Florian octo Forster <octo@verplant.org>\n"
@@ -467,7 +470,7 @@ static int read_options (int argc, char **argv) /* {{{ */
 
        while (1)
        {
-               optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:");
+               optchar = getopt (argc, argv, "46c:hi:I:t:Q:f:D:Z:");
 
                if (optchar == -1)
                        break;
@@ -538,6 +541,23 @@ static int read_options (int argc, char **argv) /* {{{ */
                                set_opt_send_qos (optarg);
                                break;
 
+                        case 'Z':
+                       {
+                               char *endptr = NULL;
+                               double tmp;
+
+                               errno = 0;
+                               tmp = strtod (optarg, &endptr);
+                               if ((errno != 0) || (endptr == NULL) || (*endptr != 0))
+                                       fprintf (stderr, "The \"-Z\" option requires a numeric argument.\n");
+                               else if ((tmp >= 0.0) && (tmp <= 100.0))
+                                       opt_exit_status_threshold = tmp / 100.0;
+                               else
+                                       fprintf (stderr, "The argument of the \"-Z\" option must be between 0 and 100.\n");
+
+                               break;
+                       }
+
                        case 'h':
                                usage_exit (argv[0], 0);
                                break;
@@ -979,10 +999,10 @@ static int post_loop_hook (pingobj_t *ping) /* {{{ */
                                context->latency_total);
 
                {
-                 /* threshold for counting failed returns is 50%, rounding up */
-                 int threshold = (context->req_sent + 1) / 2;
-                 if (context->req_rcvd < threshold)
-                   failure_count += threshold - context->req_rcvd;
+                       double pct_failed = 1.0 - (((double) context->req_rcvd)
+                                       / ((double) context->req_sent));
+                       if (pct_failed > opt_exit_status_threshold)
+                               failure_count++;
                }
 
                if (context->req_rcvd != 0)