1 /**
2 * collectd - src/syslog.c
3 * Copyright (C) 2007 Florian Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Florian Forster <octo at verplant.org>
21 **/
23 #include "collectd.h"
24 #include "common.h"
25 #include "plugin.h"
27 #if HAVE_SYSLOG_H
28 # include <syslog.h>
29 #endif
31 #if COLLECT_DEBUG
32 static int log_level = LOG_DEBUG;
33 #else
34 static int log_level = LOG_INFO;
35 #endif /* COLLECT_DEBUG */
36 static int notif_severity = -1;
38 static const char *config_keys[] =
39 {
40 "LogLevel",
41 "NotifyLevel",
42 };
43 static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
45 static int sl_config (const char *key, const char *value)
46 {
47 if (strcasecmp (key, "LogLevel") == 0)
48 {
49 log_level = parse_log_severity (value);
50 if (log_level == -1) return (1);
51 }
52 else if (strcasecmp (key, "NotifyLevel") == 0)
53 {
54 notif_severity = parse_notif_severity(key);
55 }
57 return (0);
58 } /* int sl_config */
60 static void sl_log (int severity, const char *msg,
61 user_data_t __attribute__((unused)) *user_data)
62 {
63 if (severity > log_level)
64 return;
66 syslog (severity, "%s", msg);
67 } /* void sl_log */
69 static int sl_shutdown (void)
70 {
71 closelog ();
73 return (0);
74 }
76 static int sl_notification (const notification_t *n,
77 user_data_t __attribute__((unused)) *user_data)
78 {
79 char buf[1024] = "";
80 char *buf_ptr = buf;
81 int buf_len = sizeof (buf);
82 int status;
83 int severity;
85 /* do nothing if parsing of NotifSeverity failed */
86 if (notif_severity == -1)
87 return 0;
88 /* do nothing if NotifSeverity is higer than notification
89 * note that OKAY notifs will always be displayed */
90 if ((notif_severity == NOTIF_FAILURE) && (n -> severity == NOTIF_WARNING))
91 return 0;
93 status = ssnprintf (buf_ptr, buf_len, "Notification: severity = %s",
94 (n->severity == NOTIF_FAILURE) ? "FAILURE"
95 : ((n->severity == NOTIF_WARNING) ? "WARNING"
96 : ((n->severity == NOTIF_OKAY) ? "OKAY" : "UNKNOWN")));
97 if (status > 0)
98 {
99 buf_ptr += status;
100 buf_len -= status;
101 }
103 #define APPEND(bufptr, buflen, key, value) \
104 if ((buflen > 0) && (strlen (value) > 0)) { \
105 int status = ssnprintf (bufptr, buflen, ", %s = %s", key, value); \
106 if (status > 0) { \
107 bufptr += status; \
108 buflen -= status; \
109 } \
110 }
111 APPEND (buf_ptr, buf_len, "host", n->host);
112 APPEND (buf_ptr, buf_len, "plugin", n->plugin);
113 APPEND (buf_ptr, buf_len, "plugin_instance", n->plugin_instance);
114 APPEND (buf_ptr, buf_len, "type", n->type);
115 APPEND (buf_ptr, buf_len, "type_instance", n->type_instance);
116 APPEND (buf_ptr, buf_len, "message", n->message);
118 buf[sizeof (buf) - 1] = '\0';
120 switch (n->severity)
121 {
122 case NOTIF_FAILURE:
123 severity = LOG_ERR;
124 break;
125 case NOTIF_WARNING:
126 severity = LOG_WARNING;
127 break;
128 case NOTIF_OKAY:
129 severity = LOG_WARNING;
130 break;
131 default: severity = LOG_INFO;
132 }
133 sl_log (severity, buf, NULL);
135 return (0);
136 } /* int sl_notification */
138 void module_register (void)
139 {
140 openlog ("collectd", LOG_CONS | LOG_PID, LOG_DAEMON);
142 plugin_register_config ("syslog", sl_config, config_keys, config_keys_num);
143 plugin_register_log ("syslog", sl_log, /* user_data = */ NULL);
144 plugin_register_notification ("syslog", sl_notification, NULL);
145 plugin_register_shutdown ("syslog", sl_shutdown);
146 } /* void module_register(void) */