1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/*****************************************************************************
*
* Nagios check_users plugin
*
* License: GPL
* Copyright (c) 2000-2007 Nagios Plugins Development Team
*
* Description:
*
* This file contains the check_users plugin
*
* This plugin checks the number of users currently logged in on the local
* system and generates an error if the number exceeds the thresholds
* specified.
*
*
* 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_users";
const char *copyright = "2000-2007";
const char *email = "nagiosplug-devel@lists.sourceforge.net";
#include "common.h"
#include "popen.h"
#include "utils.h"
#define possibly_set(a,b) ((a) == 0 ? (b) : 0)
int process_arguments (int, char **);
void print_help (void);
void print_usage (void);
int wusers = -1;
int cusers = -1;
int
main (int argc, char **argv)
{
int users = -1;
int result = STATE_UNKNOWN;
char input_buffer[MAX_INPUT_BUFFER];
char *perf;
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
perf = strdup("");
/* Parse extra opts if any */
argv=np_extra_opts (&argc, argv, progname);
if (process_arguments (argc, argv) == ERROR)
usage4 (_("Could not parse arguments"));
/* run the command */
child_process = spopen (WHO_COMMAND);
if (child_process == NULL) {
printf (_("Could not open pipe: %s\n"), WHO_COMMAND);
return STATE_UNKNOWN;
}
child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
if (child_stderr == NULL)
printf (_("Could not open stderr for %s\n"), WHO_COMMAND);
users = 0;
while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
/* increment 'users' on all lines except total user count */
if (input_buffer[0] != '#') {
users++;
continue;
}
/* get total logged in users */
if (sscanf (input_buffer, _("# users=%d"), &users) == 1)
break;
}
/* check STDERR */
if (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr))
result = possibly_set (result, STATE_UNKNOWN);
(void) fclose (child_stderr);
/* close the pipe */
if (spclose (child_process))
result = possibly_set (result, STATE_UNKNOWN);
/* else check the user count against warning and critical thresholds */
if (users > cusers)
result = STATE_CRITICAL;
else if (users > wusers)
result = STATE_WARNING;
else if (users >= 0)
result = STATE_OK;
if (result == STATE_UNKNOWN)
printf ("%s\n", _("Unable to read output"));
else {
asprintf(&perf, "%s", perfdata ("users", users, "",
TRUE, wusers,
TRUE, cusers,
TRUE, 0,
FALSE, 0));
printf (_("USERS %s - %d users currently logged in |%s\n"), state_text (result),
users, perf);
}
return result;
}
/* process command-line arguments */
int
process_arguments (int argc, char **argv)
{
int c;
int option = 0;
static struct option longopts[] = {
{"critical", required_argument, 0, 'c'},
{"warning", required_argument, 0, 'w'},
{"version", no_argument, 0, 'V'},
{"help", no_argument, 0, 'h'},
{0, 0, 0, 0}
};
if (argc < 2)
usage ("\n");
while (1) {
c = getopt_long (argc, argv, "+hVvc:w:", 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_OK);
case 'V': /* version */
print_revision (progname, NP_VERSION);
exit (STATE_OK);
case 'c': /* critical */
if (!is_intnonneg (optarg))
usage4 (_("Critical threshold must be a positive integer"));
else
cusers = atoi (optarg);
break;
case 'w': /* warning */
if (!is_intnonneg (optarg))
usage4 (_("Warning threshold must be a positive integer"));
else
wusers = atoi (optarg);
break;
}
}
c = optind;
if (wusers == -1 && argc > c) {
if (is_intnonneg (argv[c]) == FALSE)
usage4 (_("Warning threshold must be a positive integer"));
else
wusers = atoi (argv[c++]);
}
if (cusers == -1 && argc > c) {
if (is_intnonneg (argv[c]) == FALSE)
usage4 (_("Warning threshold must be a positive integer"));
else
cusers = atoi (argv[c]);
}
return OK;
}
void
print_help (void)
{
print_revision (progname, NP_VERSION);
printf ("Copyright (c) 1999 Ethan Galstad\n");
printf (COPYRIGHT, copyright, email);
printf ("%s\n", _("This plugin checks the number of users currently logged in on the local"));
printf ("%s\n", _("system and generates an error if the number exceeds the thresholds specified."));
printf ("\n\n");
print_usage ();
printf (UT_HELP_VRSN);
printf (UT_EXTRA_OPTS);
printf (" %s\n", "-w, --warning=INTEGER");
printf (" %s\n", _("Set WARNING status if more than INTEGER users are logged in"));
printf (" %s\n", "-c, --critical=INTEGER");
printf (" %s\n", _("Set CRITICAL status if more than INTEGER users are logged in"));
printf (UT_SUPPORT);
}
void
print_usage (void)
{
printf (_("Usage:"));
printf ("%s -w <users> -c <users>\n", progname);
}
|