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check_memcached_connections.c
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check_memcached_connections.c
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/* -*- mode: c -*-
*
* Nagios check_memcached_connections plugin
*
* License: New BSD License
* Copyright (c) HIROSE, Masaaki. All rights reserved.
*/
const char *progname = "check_memcached_connections";
const char *revision = "$Revision: 0.1 $";
#define MY_COPYRIGHT "Copyright (c) HIROSE, Masaaki. All rights reserved.\n\
\t<%s>\n\n"
const char *email = "hirose31 _at_ gmail.com";
#include <unistd.h>
#include "common.h"
#include "utils.h"
#include "utils_base.h"
#include "netutils.h"
#include <libmemcached/memcached.h>
#define MEMCACHED_PORT 11211
#define EXIT_OK 0
#define EXIT_WARNING 1
#define EXIT_CRITICAL 2
#define EXIT_UNKNOWN 3
char *mc_host = NULL;
in_port_t mc_port = MEMCACHED_PORT;
int process_arguments(int, char **);
int validate_arguments(void);
void print_help(void);
void print_usage(void);
int verbose = 0;
thresholds *my_thresholds = NULL;
#if DO_TRACE
#define TRACE(fmt, ...) \
{ \
struct tm tm; \
struct timeval tv; \
gettimeofday(&tv, NULL); \
localtime_r(&(tv.tv_sec), &tm); \
printf("%02d:%02d:%02d.%06lu %.12s.%4d: (trace ) "fmt"\n", \
tm.tm_hour,tm.tm_min,tm.tm_sec, \
tv.tv_usec, \
__FILE__, __LINE__, __VA_ARGS__); \
}
#else
#define TRACE(fmt, ...)
#endif
int main(int argc, char ** argv)
{
struct memcached_st *mc;
struct memcached_stat_st *stats;
memcached_return_t rc;
long cur_conn = -1;
int status;
char* status_msg;
struct timeval tv;
long microsec;
double elapsed_time;
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
/* Parse extra opts if any */
argv = np_extra_opts (&argc, argv, progname);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
TRACE("%s",">>main");
// initialize
gettimeofday(&tv, NULL);
mc = memcached_create(NULL);
if (mc == NULL) {
printf("MEMCACHED %s: failed to memcached_create\n", _("CRITICAL"));
exit(EXIT_CRITICAL);
}
TRACE("[server]%s:%s", mc_host, mc_port);
rc = memcached_server_add(mc, mc_host, (in_port_t)mc_port);
TRACE("[mc_server_add rv]%d", rc);
if (rc != MEMCACHED_SUCCESS) {
printf("MEMCACHED %s: failed to memcached_server_add (%d)\n", _("CRITICAL"), rc);
exit(EXIT_CRITICAL);
}
memcached_behavior_set(mc, MEMCACHED_BEHAVIOR_TCP_NODELAY, 1);
stats = memcached_stat(mc, NULL, &rc);
if (! stats) {
printf("MEMCACHED %s: failed to memcached_stats\n", _("CRITICAL"));
exit(EXIT_CRITICAL);
}
cur_conn = stats->curr_connections;
memcached_stat_free(mc, stats);
memcached_free(mc);
status = get_status(cur_conn, my_thresholds);
status_msg = _("CRITICAL");
if (status == STATE_OK) {
status_msg = _("OK");
} else if (status == STATE_WARNING) {
status_msg = _("WARNING");
} else if (status == STATE_CRITICAL) {
status_msg = _("CRITICAL");
}
microsec = deltime(tv);
elapsed_time = (double)microsec / 1.0e6;
printf("MEMCACHED %s: conn %ld, %.3f seconds\n", status_msg, cur_conn, elapsed_time);
return status;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c;
char *warning = NULL;
char *critical = NULL;
int option = 0;
static struct option longopts[] = {
{"hostname" ,required_argument, 0, 'H'},
{"port" ,required_argument, 0, 'P'},
{"verbose" ,no_argument, 0, 'v'},
{"version" ,no_argument, 0, 'V'},
{"help" ,no_argument, 0, 'h'},
{"warning" ,required_argument, 0, 'w'},
{"critical" ,required_argument, 0, 'c'},
{0, 0, 0, 0}
};
if (argc < 1)
return ERROR;
while (1) {
c = getopt_long (argc, argv, "H:P:vVhw:c:", longopts, &option);
if (c == -1 || c == EOF)
break;
switch (c) {
case 'H':
if (is_host(optarg)) {
mc_host = optarg;
}
else {
usage2(_("Invalid hostname/address"), optarg);
}
break;
case 'P':
mc_port = (in_port_t)atoi(optarg);
break;
case 'v':
verbose++;
break;
case 'V':
print_revision(progname, revision);
exit(STATE_OK);
case 'h':
print_help();
exit (STATE_OK);
case 'w':
warning = optarg;
break;
case 'c':
critical = optarg;
break;
case '?':
usage5();
}
}
c = optind;
set_thresholds(&my_thresholds, warning, critical);
return validate_arguments();
}
int validate_arguments(void)
{
if (mc_host == NULL)
usage("Must specify memcached server");
return OK;
}
void print_help(void)
{
char *mcport;
asprintf(&mcport, "%d", MEMCACHED_PORT);
print_revision (progname, revision);
printf (_(MY_COPYRIGHT), email);
printf ("%s\n", _("This program checks results of request sequentially: SET, GET, DELETE, GET"));
printf ("\n\n");
print_usage ();
printf (_(UT_HELP_VRSN));
printf ("%s",_(UT_EXTRA_OPTS));
printf (_(UT_WARN_CRIT_RANGE));
printf (_(UT_HOST_PORT), 'P', mcport);
#ifdef NP_EXTRA_OPTS
printf ("\n");
printf ("%s\n", _("Notes:"));
printf (_(UT_EXTRA_OPTS_NOTES));
#endif
/* printf (_(UT_SUPPORT)); */
puts("\nRepository:\n http://github.com/hirose31/nagios-check_memcached_connections/tree/master\n\n");
}
void print_usage(void)
{
printf (_("Usage:"));
printf (" %s -H host [-P port] [-E expire] [-w warn] [-c crit]\n", progname);
}