1 /**
2 * collectd - src/logfile.c
3 * Copyright (C) 2007 Sebastian Harl
4 * Copyright (C) 2007,2008 Florian Forster
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
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 * Sebastian Harl <sh at tokkee.org>
21 * Florian Forster <octo at verplant.org>
22 **/
24 #include "collectd.h"
25 #include "common.h"
26 #include "plugin.h"
28 #include <pthread.h>
30 #define DEFAULT_LOGFILE LOCALSTATEDIR"/log/collectd.log"
32 #if COLLECT_DEBUG
33 static int log_level = LOG_DEBUG;
34 #else
35 static int log_level = LOG_INFO;
36 #endif /* COLLECT_DEBUG */
38 static pthread_mutex_t file_lock = PTHREAD_MUTEX_INITIALIZER;
40 static char *log_file = NULL;
41 static int print_timestamp = 1;
42 static int print_severity = 0;
44 static const char *config_keys[] =
45 {
46 "LogLevel",
47 "File",
48 "Timestamp",
49 "PrintSeverity"
50 };
51 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
53 static int logfile_config (const char *key, const char *value)
54 {
55 if (0 == strcasecmp (key, "LogLevel")) {
56 log_level = parse_log_severity(value);
57 if (log_level < 0) {
58 log_level = LOG_INFO;
59 ERROR ("logfile: invalid loglevel [%s] defaulting to 'info'", value);
60 return (1);
61 }
62 }
63 else if (0 == strcasecmp (key, "File")) {
64 sfree (log_file);
65 log_file = strdup (value);
66 }
67 else if (0 == strcasecmp (key, "Timestamp")) {
68 if (IS_FALSE (value))
69 print_timestamp = 0;
70 else
71 print_timestamp = 1;
72 } else if (0 == strcasecmp(key, "PrintSeverity")) {
73 if (IS_FALSE (value))
74 print_severity = 0;
75 else
76 print_severity = 1;
77 }
78 else {
79 return -1;
80 }
81 return 0;
82 } /* int logfile_config (const char *, const char *) */
84 static void logfile_print (const char *msg, int severity,
85 cdtime_t timestamp_time)
86 {
87 FILE *fh;
88 _Bool do_close = 0;
89 struct tm timestamp_tm;
90 char timestamp_str[64];
91 char level_str[16] = "";
93 if (print_severity)
94 {
95 switch (severity)
96 {
97 case LOG_ERR:
98 snprintf(level_str, sizeof (level_str), "[error] ");
99 break;
100 case LOG_WARNING:
101 snprintf(level_str, sizeof (level_str), "[warning] ");
102 break;
103 case LOG_NOTICE:
104 snprintf(level_str, sizeof (level_str), "[notice] ");
105 break;
106 case LOG_INFO:
107 snprintf(level_str, sizeof (level_str), "[info] ");
108 break;
109 case LOG_DEBUG:
110 snprintf(level_str, sizeof (level_str), "[debug] ");
111 break;
112 default:
113 break;
114 }
115 }
117 if (print_timestamp)
118 {
119 time_t tt = CDTIME_T_TO_TIME_T (timestamp_time);
120 localtime_r (&tt, ×tamp_tm);
122 strftime (timestamp_str, sizeof (timestamp_str), "%Y-%m-%d %H:%M:%S",
123 ×tamp_tm);
124 timestamp_str[sizeof (timestamp_str) - 1] = '\0';
125 }
127 pthread_mutex_lock (&file_lock);
129 if (log_file == NULL)
130 {
131 fh = fopen (DEFAULT_LOGFILE, "a");
132 do_close = 1;
133 }
134 else if (strcasecmp (log_file, "stderr") == 0)
135 fh = stderr;
136 else if (strcasecmp (log_file, "stdout") == 0)
137 fh = stdout;
138 else
139 {
140 fh = fopen (log_file, "a");
141 do_close = 1;
142 }
144 if (fh == NULL)
145 {
146 char errbuf[1024];
147 fprintf (stderr, "logfile plugin: fopen (%s) failed: %s\n",
148 (log_file == NULL) ? DEFAULT_LOGFILE : log_file,
149 sstrerror (errno, errbuf, sizeof (errbuf)));
150 }
151 else
152 {
153 if (print_timestamp)
154 fprintf (fh, "[%s] %s%s\n", timestamp_str, level_str, msg);
155 else
156 fprintf (fh, "%s%s\n", level_str, msg);
158 if (do_close) {
159 fclose (fh);
160 } else {
161 fflush(fh);
162 }
163 }
165 pthread_mutex_unlock (&file_lock);
167 return;
168 } /* void logfile_print */
170 static void logfile_log (int severity, const char *msg,
171 user_data_t __attribute__((unused)) *user_data)
172 {
173 if (severity > log_level)
174 return;
176 logfile_print (msg, severity, cdtime ());
177 } /* void logfile_log (int, const char *) */
179 static int logfile_notification (const notification_t *n,
180 user_data_t __attribute__((unused)) *user_data)
181 {
182 char buf[1024] = "";
183 char *buf_ptr = buf;
184 int buf_len = sizeof (buf);
185 int status;
187 status = ssnprintf (buf_ptr, buf_len, "Notification: severity = %s",
188 (n->severity == NOTIF_FAILURE) ? "FAILURE"
189 : ((n->severity == NOTIF_WARNING) ? "WARNING"
190 : ((n->severity == NOTIF_OKAY) ? "OKAY" : "UNKNOWN")));
191 if (status > 0)
192 {
193 buf_ptr += status;
194 buf_len -= status;
195 }
197 #define APPEND(bufptr, buflen, key, value) \
198 if ((buflen > 0) && (strlen (value) > 0)) { \
199 int status = ssnprintf (bufptr, buflen, ", %s = %s", key, value); \
200 if (status > 0) { \
201 bufptr += status; \
202 buflen -= status; \
203 } \
204 }
205 APPEND (buf_ptr, buf_len, "host", n->host);
206 APPEND (buf_ptr, buf_len, "plugin", n->plugin);
207 APPEND (buf_ptr, buf_len, "plugin_instance", n->plugin_instance);
208 APPEND (buf_ptr, buf_len, "type", n->type);
209 APPEND (buf_ptr, buf_len, "type_instance", n->type_instance);
210 APPEND (buf_ptr, buf_len, "message", n->message);
212 buf[sizeof (buf) - 1] = '\0';
214 logfile_print (buf, LOG_INFO,
215 (n->time != 0) ? n->time : cdtime ());
217 return (0);
218 } /* int logfile_notification */
220 void module_register (void)
221 {
222 plugin_register_config ("logfile", logfile_config,
223 config_keys, config_keys_num);
224 plugin_register_log ("logfile", logfile_log, /* user_data = */ NULL);
225 plugin_register_notification ("logfile", logfile_notification,
226 /* user_data = */ NULL);
227 } /* void module_register (void) */
229 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */