1 /**
2 * collectd - src/notify_nagios.c
3 * Copyright (C) 2015 Florian octo Forster
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Florian octo Forster <octo at collectd.org>
25 */
27 #include "collectd.h"
28 #include "plugin.h"
29 #include "common.h"
30 #include "configfile.h"
32 #define NAGIOS_OK 0
33 #define NAGIOS_WARNING 1
34 #define NAGIOS_CRITICAL 2
35 #define NAGIOS_UNKNOWN 3
37 #ifndef NAGIOS_COMMAND_FILE
38 # define NAGIOS_COMMAND_FILE "/usr/local/nagios/var/rw/nagios.cmd"
39 #endif
41 static char *nagios_command_file;
43 static int nagios_config (oconfig_item_t *ci) /* {{{ */
44 {
45 int i;
47 for (i = 0; i < ci->children_num; i++)
48 {
49 oconfig_item_t *child = ci->children + i;
51 if (strcasecmp ("CommandFile", child->key) == 0)
52 cf_util_get_string (child, &nagios_command_file);
53 else
54 WARNING ("notify_nagios plugin: Ignoring unknown config option \"%s\".",
55 child->key);
56 }
58 return 0;
59 } /* }}} nagios_config */
61 static int nagios_print (char const *buffer) /* {{{ */
62 {
63 char const *file = NAGIOS_COMMAND_FILE;
64 int fd;
65 int status;
66 struct flock lock;
68 if (nagios_command_file != NULL)
69 file = nagios_command_file;
71 fd = open (file, O_WRONLY | O_APPEND);
72 if (fd < 0)
73 {
74 char errbuf[1024];
75 status = errno;
76 ERROR ("notify_nagios plugin: Opening \"%s\" failed: %s",
77 file, sstrerror (status, errbuf, sizeof (errbuf)));
78 return status;
79 }
81 memset (&lock, 0, sizeof (lock));
82 lock.l_type = F_WRLCK;
83 lock.l_whence = SEEK_END;
84 lock.l_start = 0;
85 lock.l_len = 0; /* to end of file */
87 status = fcntl (fd, F_GETLK, &lock);
88 if (status != 0)
89 {
90 char errbuf[1024];
91 status = errno;
92 ERROR ("notify_nagios plugin: Failed to acquire write lock on \"%s\": %s",
93 file, sstrerror (status, errbuf, sizeof (errbuf)));
94 close (fd);
95 return status;
96 }
98 status = (int) lseek (fd, 0, SEEK_END);
99 if (status == -1)
100 {
101 char errbuf[1024];
102 status = errno;
103 ERROR ("notify_nagios plugin: Seeking to end of \"%s\" failed: %s",
104 file, sstrerror (status, errbuf, sizeof (errbuf)));
105 close (fd);
106 return status;
107 }
109 status = (int) swrite (fd, buffer, strlen (buffer));
110 if (status != 0)
111 {
112 char errbuf[1024];
113 status = errno;
114 ERROR ("notify_nagios plugin: Writing to \"%s\" failed: %s",
115 file, sstrerror (status, errbuf, sizeof (errbuf)));
116 close (fd);
117 return status;
118 }
120 close (fd);
121 return status;
122 } /* }}} int nagios_print */
124 static int nagios_notify (const notification_t *n, /* {{{ */
125 __attribute__((unused)) user_data_t *user_data)
126 {
127 char svc_description[4 * DATA_MAX_NAME_LEN];
128 char buffer[4096];
129 int code;
130 int status;
132 status = format_name (svc_description, (int) sizeof (svc_description),
133 /* host */ "", n->plugin, n->plugin_instance, n->type, n->type_instance);
134 if (status != 0)
135 {
136 ERROR ("notify_nagios plugin: Formatting service name failed.");
137 return status;
138 }
140 switch (n->severity)
141 {
142 case NOTIF_OKAY:
143 code = NAGIOS_OK;
144 break;
145 case NOTIF_WARNING:
146 code = NAGIOS_WARNING;
147 break;
148 case NOTIF_FAILURE:
149 code = NAGIOS_CRITICAL;
150 break;
151 default:
152 code = NAGIOS_UNKNOWN;
153 break;
154 }
156 ssnprintf (buffer, sizeof (buffer),
157 "[%.0f] PROCESS_SERVICE_CHECK_RESULT;%s;%s;%d;%s\n",
158 CDTIME_T_TO_DOUBLE (n->time), n->host, &svc_description[1], code,
159 n->message);
161 return nagios_print (buffer);
162 } /* }}} int nagios_notify */
164 void module_register (void)
165 {
166 plugin_register_complex_config ("notify_nagios", nagios_config);
167 plugin_register_notification ("notify_nagios", nagios_notify, NULL);
168 } /* void module_register (void) */
170 /* vim: set sw=2 sts=2 ts=8 et : */