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authorJan Wagner <waja@cyconet.org>2014-01-30 08:35:41 (GMT)
committerJan Wagner <waja@cyconet.org>2014-01-30 10:07:22 (GMT)
commitdf53473d03783ef853465c80162758bb6ee403c7 (patch)
tree7cd67f0a582c6164546c4c187aa02c6f2800ed88
parent7310030ae7a30f61990641c5c1674531823f457f (diff)
downloadmonitoring-plugins-df53473d03783ef853465c80162758bb6ee403c7.tar.gz
check_dig: patch to make dig honor -t option
When a timeout value is specified with the -t option, dig will sometimes timeout before the timer is actually reached. The problem occurs because the check_dig plugin does not pass the specified timeout value to dig, leaving dig to timeout with it's default value which seems to be around 10-15seconds. To reproduce: time ./check_dig -H 127.0.0.2 -l www.google.com -t 30 It will not run for 30secs, which is the expected behaviour. The following will work, because the timeout is less than the default dig timeout, so the plugin cancels the dig command: time ./check_dig -H 127.0.0.2 -l www.google.com -t 2 This fix passes the timeout value to dig, and sets the number of retries which tends to vary from system to system by default. Closes #1168
-rw-r--r--THANKS.in1
-rw-r--r--plugins/check_dig.c11
2 files changed, 10 insertions, 2 deletions
diff --git a/THANKS.in b/THANKS.in
index aef787c..2cfa54e 100644
--- a/THANKS.in
+++ b/THANKS.in
@@ -305,3 +305,4 @@ Geoff Oakham
305Tim Laszlo 305Tim Laszlo
306Stéphane Bortzmeyer 306Stéphane Bortzmeyer
307Luca Corti 307Luca Corti
308Jethro Carr
diff --git a/plugins/check_dig.c b/plugins/check_dig.c
index 7575995..5638017 100644
--- a/plugins/check_dig.c
+++ b/plugins/check_dig.c
@@ -48,6 +48,8 @@ void print_usage (void);
48 48
49#define UNDEFINED 0 49#define UNDEFINED 0
50#define DEFAULT_PORT 53 50#define DEFAULT_PORT 53
51#define DEFAULT_TRIES 3
52#define DEFAULT_TIMEOUT 10
51 53
52char *query_address = NULL; 54char *query_address = NULL;
53char *record_type = "A"; 55char *record_type = "A";
@@ -57,6 +59,7 @@ char *dig_args = "";
57char *query_transport = ""; 59char *query_transport = "";
58int verbose = FALSE; 60int verbose = FALSE;
59int server_port = DEFAULT_PORT; 61int server_port = DEFAULT_PORT;
62int number_tries = DEFAULT_TRIES;
60double warning_interval = UNDEFINED; 63double warning_interval = UNDEFINED;
61double critical_interval = UNDEFINED; 64double critical_interval = UNDEFINED;
62struct timeval tv; 65struct timeval tv;
@@ -72,6 +75,7 @@ main (int argc, char **argv)
72 long microsec; 75 long microsec;
73 double elapsed_time; 76 double elapsed_time;
74 int result = STATE_UNKNOWN; 77 int result = STATE_UNKNOWN;
78 timeout_interval = DEFAULT_TIMEOUT;
75 79
76 setlocale (LC_ALL, ""); 80 setlocale (LC_ALL, "");
77 bindtextdomain (PACKAGE, LOCALEDIR); 81 bindtextdomain (PACKAGE, LOCALEDIR);
@@ -87,9 +91,12 @@ main (int argc, char **argv)
87 if (process_arguments (argc, argv) == ERROR) 91 if (process_arguments (argc, argv) == ERROR)
88 usage_va(_("Could not parse arguments")); 92 usage_va(_("Could not parse arguments"));
89 93
94 /* dig applies the timeout to each try, so we need to work around this */
95 int timeout_interval_dig = ceil((double) timeout_interval / (double) number_tries);
96
90 /* get the command to run */ 97 /* get the command to run */
91 xasprintf (&command_line, "%s %s @%s -p %d %s -t %s %s", 98 xasprintf (&command_line, "%s @%s -p %d %s -t %s %s %s +tries=%d +time=%d",
92 PATH_TO_DIG, query_transport, dns_server, server_port, query_address, record_type, dig_args); 99 PATH_TO_DIG, dns_server, server_port, query_address, record_type, dig_args, query_transport, number_tries, timeout_interval_dig);
93 100
94 alarm (timeout_interval); 101 alarm (timeout_interval);
95 gettimeofday (&tv, NULL); 102 gettimeofday (&tv, NULL);