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monitoring-plugins/plugins/check_overcr.c
Lorenz Kästle 2031a5aceb check_overcr: delare file local variables static
2024-11-08 12:20:03 +01:00

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/*****************************************************************************
*
* Monitoring check_overcr plugin
*
* License: GPL
* Copyright (c) 2000-2024 Monitoring Plugins Development Team
*
* Description:
*
* This file contains the check_overcr plugin
*
* This plugin attempts to contact the Over-CR collector daemon running on the
* remote UNIX server in order to gather the requested system information.
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
*****************************************************************************/
const char *progname = "check_overcr";
const char *copyright = "2000-2024";
const char *email = "devel@monitoring-plugins.org";
#include "common.h"
#include "netutils.h"
#include "utils.h"
enum checkvar {
NONE,
LOAD1,
LOAD5,
LOAD15,
DPU,
PROCS,
NETSTAT,
UPTIME
};
enum {
PORT = 2000
};
static char *server_address = NULL;
static int server_port = PORT;
static double warning_value = 0L;
static double critical_value = 0L;
static bool check_warning_value = false;
static bool check_critical_value = false;
static enum checkvar vars_to_check = NONE;
static int netstat_port = 0;
static char *disk_name = NULL;
static char *process_name = NULL;
static char send_buffer[MAX_INPUT_BUFFER];
static int process_arguments(int, char **);
void print_usage(void);
static void print_help(void);
int main(int argc, char **argv) {
int result = STATE_UNKNOWN;
char recv_buffer[MAX_INPUT_BUFFER];
char temp_buffer[MAX_INPUT_BUFFER];
char *temp_ptr = NULL;
bool found_disk = false;
unsigned long percent_used_disk_space = 100;
double load;
double load_1min;
double load_5min;
double load_15min;
int port_connections = 0;
int processes = 0;
double uptime_raw_hours;
int uptime_raw_minutes = 0;
int uptime_days = 0;
int uptime_hours = 0;
int uptime_minutes = 0;
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"));
/* initialize alarm signal handling */
signal(SIGALRM, socket_timeout_alarm_handler);
/* set socket timeout */
alarm(socket_timeout);
result = process_tcp_request2(server_address, server_port, send_buffer, recv_buffer, sizeof(recv_buffer));
switch (vars_to_check) {
case LOAD1:
case LOAD5:
case LOAD15:
if (result != STATE_OK)
die(result, _("Unknown error fetching load data\n"));
temp_ptr = (char *)strtok(recv_buffer, "\r\n");
if (temp_ptr == NULL)
die(STATE_CRITICAL, _("Invalid response from server - no load information\n"));
else
load_1min = strtod(temp_ptr, NULL);
temp_ptr = (char *)strtok(NULL, "\r\n");
if (temp_ptr == NULL)
die(STATE_CRITICAL, _("Invalid response from server after load 1\n"));
else
load_5min = strtod(temp_ptr, NULL);
temp_ptr = (char *)strtok(NULL, "\r\n");
if (temp_ptr == NULL)
die(STATE_CRITICAL, _("Invalid response from server after load 5\n"));
else
load_15min = strtod(temp_ptr, NULL);
switch (vars_to_check) {
case LOAD1:
strcpy(temp_buffer, "1");
load = load_1min;
break;
case LOAD5:
strcpy(temp_buffer, "5");
load = load_5min;
break;
default:
strcpy(temp_buffer, "15");
load = load_15min;
break;
}
if (check_critical_value && (load >= critical_value))
result = STATE_CRITICAL;
else if (check_warning_value && (load >= warning_value))
result = STATE_WARNING;
die(result, _("Load %s - %s-min load average = %0.2f"), state_text(result), temp_buffer, load);
break;
case DPU:
if (result != STATE_OK)
die(result, _("Unknown error fetching disk data\n"));
for (temp_ptr = (char *)strtok(recv_buffer, " "); temp_ptr != NULL; temp_ptr = (char *)strtok(NULL, " ")) {
if (!strcmp(temp_ptr, disk_name)) {
found_disk = true;
temp_ptr = (char *)strtok(NULL, "%");
if (temp_ptr == NULL)
die(STATE_CRITICAL, _("Invalid response from server\n"));
else
percent_used_disk_space = strtoul(temp_ptr, NULL, 10);
break;
}
temp_ptr = (char *)strtok(NULL, "\r\n");
}
/* error if we couldn't find the info for the disk */
if (!found_disk)
die(STATE_CRITICAL, "CRITICAL - Disk '%s' non-existent or not mounted", disk_name);
if (check_critical_value && (percent_used_disk_space >= critical_value))
result = STATE_CRITICAL;
else if (check_warning_value && (percent_used_disk_space >= warning_value))
result = STATE_WARNING;
die(result, "Disk %s - %lu%% used on %s", state_text(result), percent_used_disk_space, disk_name);
break;
case NETSTAT:
if (result != STATE_OK)
die(result, _("Unknown error fetching network status\n"));
else
port_connections = strtod(recv_buffer, NULL);
if (check_critical_value && (port_connections >= critical_value))
result = STATE_CRITICAL;
else if (check_warning_value && (port_connections >= warning_value))
result = STATE_WARNING;
die(result, _("Net %s - %d connection%s on port %d"), state_text(result), port_connections, (port_connections == 1) ? "" : "s",
netstat_port);
break;
case PROCS:
if (result != STATE_OK)
die(result, _("Unknown error fetching process status\n"));
temp_ptr = (char *)strtok(recv_buffer, "(");
if (temp_ptr == NULL)
die(STATE_CRITICAL, _("Invalid response from server\n"));
temp_ptr = (char *)strtok(NULL, ")");
if (temp_ptr == NULL)
die(STATE_CRITICAL, _("Invalid response from server\n"));
else
processes = strtod(temp_ptr, NULL);
if (check_critical_value && (processes >= critical_value))
result = STATE_CRITICAL;
else if (check_warning_value && (processes >= warning_value))
result = STATE_WARNING;
die(result, _("Process %s - %d instance%s of %s running"), state_text(result), processes, (processes == 1) ? "" : "s",
process_name);
break;
case UPTIME:
if (result != STATE_OK)
return result;
uptime_raw_hours = strtod(recv_buffer, NULL);
uptime_raw_minutes = (unsigned long)(uptime_raw_hours * 60.0);
if (check_critical_value && (uptime_raw_minutes <= critical_value))
result = STATE_CRITICAL;
else if (check_warning_value && (uptime_raw_minutes <= warning_value))
result = STATE_WARNING;
uptime_days = uptime_raw_minutes / 1440;
uptime_raw_minutes %= 1440;
uptime_hours = uptime_raw_minutes / 60;
uptime_raw_minutes %= 60;
uptime_minutes = uptime_raw_minutes;
die(result, _("Uptime %s - Up %d days %d hours %d minutes"), state_text(result), uptime_days, uptime_hours, uptime_minutes);
break;
default:
die(STATE_UNKNOWN, _("Nothing to check!\n"));
break;
}
}
/* process command-line arguments */
int process_arguments(int argc, char **argv) {
int c;
int option = 0;
static struct option longopts[] = {
{"port", required_argument, 0, 'p'}, {"timeout", required_argument, 0, 't'}, {"critical", required_argument, 0, 'c'},
{"warning", required_argument, 0, 'w'}, {"variable", required_argument, 0, 'v'}, {"hostname", required_argument, 0, 'H'},
{"version", no_argument, 0, 'V'}, {"help", no_argument, 0, 'h'}, {0, 0, 0, 0}};
/* no options were supplied */
if (argc < 2)
return ERROR;
/* backwards compatibility */
if (!is_option(argv[1])) {
server_address = argv[1];
argv[1] = argv[0];
argv = &argv[1];
argc--;
}
for (c = 1; c < argc; c++) {
if (strcmp("-to", argv[c]) == 0)
strcpy(argv[c], "-t");
else if (strcmp("-wv", argv[c]) == 0)
strcpy(argv[c], "-w");
else if (strcmp("-cv", argv[c]) == 0)
strcpy(argv[c], "-c");
}
while (1) {
c = getopt_long(argc, argv, "+hVH:t:c:w:p:v:", longopts, &option);
if (c == -1 || c == EOF || c == 1)
break;
switch (c) {
case '?': /* print short usage statement if args not parsable */
usage5();
case 'h': /* help */
print_help();
exit(STATE_UNKNOWN);
case 'V': /* version */
print_revision(progname, NP_VERSION);
exit(STATE_UNKNOWN);
case 'H': /* hostname */
server_address = optarg;
break;
case 'p': /* port */
if (is_intnonneg(optarg))
server_port = atoi(optarg);
else
die(STATE_UNKNOWN, _("Server port an integer\n"));
break;
case 'v': /* variable */
if (strcmp(optarg, "LOAD") == 0) {
strcpy(send_buffer, "LOAD\r\nQUIT\r\n");
if (strcmp(optarg, "LOAD1") == 0)
vars_to_check = LOAD1;
else if (strcmp(optarg, "LOAD5") == 0)
vars_to_check = LOAD5;
else if (strcmp(optarg, "LOAD15") == 0)
vars_to_check = LOAD15;
} else if (strcmp(optarg, "UPTIME") == 0) {
vars_to_check = UPTIME;
strcpy(send_buffer, "UPTIME\r\n");
} else if (strstr(optarg, "PROC") == optarg) {
vars_to_check = PROCS;
process_name = strscpy(process_name, optarg + 4);
sprintf(send_buffer, "PROCESS %s\r\n", process_name);
} else if (strstr(optarg, "NET") == optarg) {
vars_to_check = NETSTAT;
netstat_port = atoi(optarg + 3);
sprintf(send_buffer, "NETSTAT %d\r\n", netstat_port);
} else if (strstr(optarg, "DPU") == optarg) {
vars_to_check = DPU;
strcpy(send_buffer, "DISKSPACE\r\n");
disk_name = strscpy(disk_name, optarg + 3);
} else
return ERROR;
break;
case 'w': /* warning threshold */
warning_value = strtoul(optarg, NULL, 10);
check_warning_value = true;
break;
case 'c': /* critical threshold */
critical_value = strtoul(optarg, NULL, 10);
check_critical_value = true;
break;
case 't': /* timeout */
socket_timeout = atoi(optarg);
if (socket_timeout <= 0)
return ERROR;
}
}
return OK;
}
void print_help(void) {
char *myport;
xasprintf(&myport, "%d", PORT);
print_revision(progname, NP_VERSION);
printf("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n");
printf(COPYRIGHT, copyright, email);
printf("%s\n", _("This plugin attempts to contact the Over-CR collector daemon running on the"));
printf("%s\n", _("remote UNIX server in order to gather the requested system information."));
printf("\n\n");
print_usage();
printf(UT_HELP_VRSN);
printf(UT_EXTRA_OPTS);
printf(UT_HOST_PORT, 'p', myport);
printf(" %s\n", "-w, --warning=INTEGER");
printf(" %s\n", _("Threshold which will result in a warning status"));
printf(" %s\n", "-c, --critical=INTEGER");
printf(" %s\n", _("Threshold which will result in a critical status"));
printf(" %s\n", "-v, --variable=STRING");
printf(" %s\n", _("Variable to check. Valid variables include:"));
printf(" %s\n", _("LOAD1 = 1 minute average CPU load"));
printf(" %s\n", _("LOAD5 = 5 minute average CPU load"));
printf(" %s\n", _("LOAD15 = 15 minute average CPU load"));
printf(" %s\n", _("DPU<filesys> = percent used disk space on filesystem <filesys>"));
printf(" %s\n", _("PROC<process> = number of running processes with name <process>"));
printf(" %s\n", _("NET<port> = number of active connections on TCP port <port>"));
printf(" %s\n", _("UPTIME = system uptime in seconds"));
printf(UT_CONN_TIMEOUT, DEFAULT_SOCKET_TIMEOUT);
printf(UT_VERBOSE);
printf("\n");
printf("%s\n", _("This plugin requires that Eric Molitors' Over-CR collector daemon be"));
printf("%s\n", _("running on the remote server."));
printf("%s\n", _("Over-CR can be downloaded from http://www.molitor.org/overcr"));
printf("%s\n", _("This plugin was tested with version 0.99.53 of the Over-CR collector"));
printf("\n");
printf("%s\n", _("Notes:"));
printf(" %s\n", _("For the available options, the critical threshold value should always be"));
printf(" %s\n", _("higher than the warning threshold value, EXCEPT with the uptime variable"));
printf(UT_SUPPORT);
}
void print_usage(void) {
printf("%s\n", _("Usage:"));
printf("%s -H host [-p port] [-v variable] [-w warning] [-c critical] [-t timeout]\n", progname);
}
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