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diff --git a/plugins/check_mysql.c b/plugins/check_mysql.c
index 4f09e5f..216626b 100644
--- a/plugins/check_mysql.c
+++ b/plugins/check_mysql.c
@@ -42,6 +42,7 @@ const char *email = "devel@monitoring-plugins.org";
42#include "netutils.h" 42#include "netutils.h"
43 43
44#include <mysql.h> 44#include <mysql.h>
45#include <mysqld_error.h>
45#include <errmsg.h> 46#include <errmsg.h>
46 47
47char *db_user = NULL; 48char *db_user = NULL;
@@ -59,6 +60,7 @@ char *opt_file = NULL;
59char *opt_group = NULL; 60char *opt_group = NULL;
60unsigned int db_port = MYSQL_PORT; 61unsigned int db_port = MYSQL_PORT;
61int check_slave = 0, warn_sec = 0, crit_sec = 0; 62int check_slave = 0, warn_sec = 0, crit_sec = 0;
63int ignore_auth = 0;
62int verbose = 0; 64int verbose = 0;
63 65
64static double warning_time = 0; 66static double warning_time = 0;
@@ -136,7 +138,16 @@ main (int argc, char **argv)
136 mysql_ssl_set(&mysql,key,cert,ca_cert,ca_dir,ciphers); 138 mysql_ssl_set(&mysql,key,cert,ca_cert,ca_dir,ciphers);
137 /* establish a connection to the server and error checking */ 139 /* establish a connection to the server and error checking */
138 if (!mysql_real_connect(&mysql,db_host,db_user,db_pass,db,db_port,db_socket,0)) { 140 if (!mysql_real_connect(&mysql,db_host,db_user,db_pass,db,db_port,db_socket,0)) {
139 if (mysql_errno (&mysql) == CR_UNKNOWN_HOST) 141 if (ignore_auth && mysql_errno (&mysql) == ER_ACCESS_DENIED_ERROR)
142 {
143 printf("MySQL OK - Version: %s (protocol %d)\n",
144 mysql_get_server_info(&mysql),
145 mysql_get_proto_info(&mysql)
146 );
147 mysql_close (&mysql);
148 return STATE_OK;
149 }
150 else if (mysql_errno (&mysql) == CR_UNKNOWN_HOST)
140 die (STATE_WARNING, "%s\n", mysql_error (&mysql)); 151 die (STATE_WARNING, "%s\n", mysql_error (&mysql));
141 else if (mysql_errno (&mysql) == CR_VERSION_ERROR) 152 else if (mysql_errno (&mysql) == CR_VERSION_ERROR)
142 die (STATE_WARNING, "%s\n", mysql_error (&mysql)); 153 die (STATE_WARNING, "%s\n", mysql_error (&mysql));
@@ -341,6 +352,7 @@ process_arguments (int argc, char **argv)
341 {"critical", required_argument, 0, 'c'}, 352 {"critical", required_argument, 0, 'c'},
342 {"warning", required_argument, 0, 'w'}, 353 {"warning", required_argument, 0, 'w'},
343 {"check-slave", no_argument, 0, 'S'}, 354 {"check-slave", no_argument, 0, 'S'},
355 {"ignore-auth", no_argument, 0, 'n'},
344 {"verbose", no_argument, 0, 'v'}, 356 {"verbose", no_argument, 0, 'v'},
345 {"version", no_argument, 0, 'V'}, 357 {"version", no_argument, 0, 'V'},
346 {"help", no_argument, 0, 'h'}, 358 {"help", no_argument, 0, 'h'},
@@ -357,7 +369,7 @@ process_arguments (int argc, char **argv)
357 return ERROR; 369 return ERROR;
358 370
359 while (1) { 371 while (1) {
360 c = getopt_long (argc, argv, "hlvVSP:p:u:d:H:s:c:w:a:k:C:D:L:f:g:", longopts, &option); 372 c = getopt_long (argc, argv, "hlvVnSP:p:u:d:H:s:c:w:a:k:C:D:L:f:g:", longopts, &option);
361 373
362 if (c == -1 || c == EOF) 374 if (c == -1 || c == EOF)
363 break; 375 break;
@@ -419,6 +431,9 @@ process_arguments (int argc, char **argv)
419 case 'S': 431 case 'S':
420 check_slave = 1; /* check-slave */ 432 check_slave = 1; /* check-slave */
421 break; 433 break;
434 case 'n':
435 ignore_auth = 1; /* ignore-auth */
436 break;
422 case 'w': 437 case 'w':
423 warning = optarg; 438 warning = optarg;
424 warning_time = strtod (warning, NULL); 439 warning_time = strtod (warning, NULL);
@@ -506,6 +521,9 @@ print_help (void)
506 printf (UT_EXTRA_OPTS); 521 printf (UT_EXTRA_OPTS);
507 522
508 printf (UT_HOST_PORT, 'P', myport); 523 printf (UT_HOST_PORT, 'P', myport);
524 printf (" %s\n", "-n, --ignore-auth");
525 printf (" %s\n", _("Ignore authentication failure and check for mysql connectivity only"));
526
509 printf (" %s\n", "-s, --socket=STRING"); 527 printf (" %s\n", "-s, --socket=STRING");
510 printf (" %s\n", _("Use the specified socket (has no effect if -H is used)")); 528 printf (" %s\n", _("Use the specified socket (has no effect if -H is used)"));
511 529