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 = { 0 };
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 lock.l_type = F_WRLCK;
82 lock.l_whence = SEEK_END;
84 status = fcntl (fd, F_GETLK, &lock);
85 if (status != 0)
86 {
87 char errbuf[1024];
88 status = errno;
89 ERROR ("notify_nagios plugin: Failed to acquire write lock on \"%s\": %s",
90 file, sstrerror (status, errbuf, sizeof (errbuf)));
91 close (fd);
92 return status;
93 }
95 status = (int) lseek (fd, 0, SEEK_END);
96 if (status == -1)
97 {
98 char errbuf[1024];
99 status = errno;
100 ERROR ("notify_nagios plugin: Seeking to end of \"%s\" failed: %s",
101 file, sstrerror (status, errbuf, sizeof (errbuf)));
102 close (fd);
103 return status;
104 }
106 status = (int) swrite (fd, buffer, strlen (buffer));
107 if (status != 0)
108 {
109 char errbuf[1024];
110 status = errno;
111 ERROR ("notify_nagios plugin: Writing to \"%s\" failed: %s",
112 file, sstrerror (status, errbuf, sizeof (errbuf)));
113 close (fd);
114 return status;
115 }
117 close (fd);
118 return status;
119 } /* }}} int nagios_print */
121 static int nagios_notify (const notification_t *n, /* {{{ */
122 __attribute__((unused)) user_data_t *user_data)
123 {
124 char svc_description[4 * DATA_MAX_NAME_LEN];
125 char buffer[4096];
126 int code;
127 int status;
129 status = format_name (svc_description, (int) sizeof (svc_description),
130 /* host */ "", n->plugin, n->plugin_instance, n->type, n->type_instance);
131 if (status != 0)
132 {
133 ERROR ("notify_nagios plugin: Formatting service name failed.");
134 return status;
135 }
137 switch (n->severity)
138 {
139 case NOTIF_OKAY:
140 code = NAGIOS_OK;
141 break;
142 case NOTIF_WARNING:
143 code = NAGIOS_WARNING;
144 break;
145 case NOTIF_FAILURE:
146 code = NAGIOS_CRITICAL;
147 break;
148 default:
149 code = NAGIOS_UNKNOWN;
150 break;
151 }
153 ssnprintf (buffer, sizeof (buffer),
154 "[%.0f] PROCESS_SERVICE_CHECK_RESULT;%s;%s;%d;%s\n",
155 CDTIME_T_TO_DOUBLE (n->time), n->host, &svc_description[1], code,
156 n->message);
158 return nagios_print (buffer);
159 } /* }}} int nagios_notify */
161 void module_register (void)
162 {
163 plugin_register_complex_config ("notify_nagios", nagios_config);
164 plugin_register_notification ("notify_nagios", nagios_notify, NULL);
165 } /* void module_register (void) */
167 /* vim: set sw=2 sts=2 ts=8 et : */