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