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"
29 #include "plugin.h"
30 #include "common.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 for (int i = 0; i < ci->children_num; i++)
46 {
47 oconfig_item_t *child = ci->children + i;
49 if (strcasecmp ("CommandFile", child->key) == 0)
50 cf_util_get_string (child, &nagios_command_file);
51 else
52 WARNING ("notify_nagios plugin: Ignoring unknown config option \"%s\".",
53 child->key);
54 }
56 return 0;
57 } /* }}} nagios_config */
59 static int nagios_print (char const *buffer) /* {{{ */
60 {
61 char const *file = NAGIOS_COMMAND_FILE;
62 int fd;
63 int status;
64 struct flock lock = { 0 };
66 if (nagios_command_file != NULL)
67 file = nagios_command_file;
69 fd = open (file, O_WRONLY | O_APPEND);
70 if (fd < 0)
71 {
72 char errbuf[1024];
73 status = errno;
74 ERROR ("notify_nagios plugin: Opening \"%s\" failed: %s",
75 file, sstrerror (status, errbuf, sizeof (errbuf)));
76 return status;
77 }
79 lock.l_type = F_WRLCK;
80 lock.l_whence = SEEK_END;
82 status = fcntl (fd, F_GETLK, &lock);
83 if (status != 0)
84 {
85 char errbuf[1024];
86 status = errno;
87 ERROR ("notify_nagios plugin: Failed to acquire write lock on \"%s\": %s",
88 file, sstrerror (status, errbuf, sizeof (errbuf)));
89 close (fd);
90 return status;
91 }
93 status = (int) lseek (fd, 0, SEEK_END);
94 if (status == -1)
95 {
96 char errbuf[1024];
97 status = errno;
98 ERROR ("notify_nagios plugin: Seeking to end of \"%s\" failed: %s",
99 file, sstrerror (status, errbuf, sizeof (errbuf)));
100 close (fd);
101 return status;
102 }
104 status = (int) swrite (fd, buffer, strlen (buffer));
105 if (status != 0)
106 {
107 char errbuf[1024];
108 status = errno;
109 ERROR ("notify_nagios plugin: Writing to \"%s\" failed: %s",
110 file, sstrerror (status, errbuf, sizeof (errbuf)));
111 close (fd);
112 return status;
113 }
115 close (fd);
116 return status;
117 } /* }}} int nagios_print */
119 static int nagios_notify (const notification_t *n, /* {{{ */
120 __attribute__((unused)) user_data_t *user_data)
121 {
122 char svc_description[4 * DATA_MAX_NAME_LEN];
123 char buffer[4096];
124 int code;
125 int status;
127 status = format_name (svc_description, (int) sizeof (svc_description),
128 /* host */ "", n->plugin, n->plugin_instance, n->type, n->type_instance);
129 if (status != 0)
130 {
131 ERROR ("notify_nagios plugin: Formatting service name failed.");
132 return status;
133 }
135 switch (n->severity)
136 {
137 case NOTIF_OKAY:
138 code = NAGIOS_OK;
139 break;
140 case NOTIF_WARNING:
141 code = NAGIOS_WARNING;
142 break;
143 case NOTIF_FAILURE:
144 code = NAGIOS_CRITICAL;
145 break;
146 default:
147 code = NAGIOS_UNKNOWN;
148 break;
149 }
151 ssnprintf (buffer, sizeof (buffer),
152 "[%.0f] PROCESS_SERVICE_CHECK_RESULT;%s;%s;%d;%s\n",
153 CDTIME_T_TO_DOUBLE (n->time), n->host, &svc_description[1], code,
154 n->message);
156 return nagios_print (buffer);
157 } /* }}} int nagios_notify */
159 void module_register (void)
160 {
161 plugin_register_complex_config ("notify_nagios", nagios_config);
162 plugin_register_notification ("notify_nagios", nagios_notify, NULL);
163 } /* void module_register (void) */
165 /* vim: set sw=2 sts=2 ts=8 et : */