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 */
26
27 #include "collectd.h"
28
29 #include "plugin.h"
30 #include "utils/common/common.h"
31
32 #define NAGIOS_OK 0
33 #define NAGIOS_WARNING 1
34 #define NAGIOS_CRITICAL 2
35 #define NAGIOS_UNKNOWN 3
36
37 #ifndef NAGIOS_COMMAND_FILE
38 #define NAGIOS_COMMAND_FILE "/usr/local/nagios/var/rw/nagios.cmd"
39 #endif
40
41 static char *nagios_command_file;
42
nagios_config(oconfig_item_t * ci)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;
47
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 }
54
55 return 0;
56 } /* }}} nagios_config */
57
nagios_print(char const * buffer)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};
64
65 if (nagios_command_file != NULL)
66 file = nagios_command_file;
67
68 fd = open(file, O_WRONLY | O_APPEND);
69 if (fd < 0) {
70 status = errno;
71 ERROR("notify_nagios plugin: Opening \"%s\" failed: %s", file, STRERRNO);
72 return status;
73 }
74
75 lock.l_type = F_WRLCK;
76 lock.l_whence = SEEK_END;
77
78 status = fcntl(fd, F_GETLK, &lock);
79 if (status != 0) {
80 status = errno;
81 ERROR("notify_nagios plugin: Failed to acquire write lock on \"%s\": %s",
82 file, STRERRNO);
83 close(fd);
84 return status;
85 }
86
87 status = (int)lseek(fd, 0, SEEK_END);
88 if (status == -1) {
89 status = errno;
90 ERROR("notify_nagios plugin: Seeking to end of \"%s\" failed: %s", file,
91 STRERRNO);
92 close(fd);
93 return status;
94 }
95
96 status = (int)swrite(fd, buffer, strlen(buffer));
97 if (status != 0) {
98 status = errno;
99 ERROR("notify_nagios plugin: Writing to \"%s\" failed: %s", file, STRERRNO);
100 close(fd);
101 return status;
102 }
103
104 close(fd);
105 return status;
106 } /* }}} int nagios_print */
107
nagios_notify(const notification_t * n,user_data_t * user_data)108 static int nagios_notify(const notification_t *n, /* {{{ */
109 __attribute__((unused)) user_data_t *user_data) {
110 char svc_description[4 * DATA_MAX_NAME_LEN];
111 char buffer[4096];
112 int code;
113 int status;
114
115 status = format_name(svc_description, (int)sizeof(svc_description),
116 /* host */ "", n->plugin, n->plugin_instance, n->type,
117 n->type_instance);
118 if (status != 0) {
119 ERROR("notify_nagios plugin: Formatting service name failed.");
120 return status;
121 }
122
123 switch (n->severity) {
124 case NOTIF_OKAY:
125 code = NAGIOS_OK;
126 break;
127 case NOTIF_WARNING:
128 code = NAGIOS_WARNING;
129 break;
130 case NOTIF_FAILURE:
131 code = NAGIOS_CRITICAL;
132 break;
133 default:
134 code = NAGIOS_UNKNOWN;
135 break;
136 }
137
138 snprintf(buffer, sizeof(buffer),
139 "[%.0f] PROCESS_SERVICE_CHECK_RESULT;%s;%s;%d;%s\n",
140 CDTIME_T_TO_DOUBLE(n->time), n->host, &svc_description[1], code,
141 n->message);
142
143 return nagios_print(buffer);
144 } /* }}} int nagios_notify */
145
module_register(void)146 void module_register(void) {
147 plugin_register_complex_config("notify_nagios", nagios_config);
148 plugin_register_notification("notify_nagios", nagios_notify, NULL);
149 } /* void module_register (void) */
150