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 == -1) return 1; /* to keep previous behaviour */
58 }
59 else if (0 == strcasecmp (key, "File")) {
60 sfree (log_file);
61 log_file = strdup (value);
62 }
63 else if (0 == strcasecmp (key, "Timestamp")) {
64 if (IS_FALSE (value))
65 print_timestamp = 0;
66 else
67 print_timestamp = 1;
68 } else if (0 == strcasecmp(key, "PrintSeverity")) {
69 if (IS_FALSE (value))
70 print_severity = 0;
71 else
72 print_severity = 1;
73 }
74 else {
75 return -1;
76 }
77 return 0;
78 } /* int logfile_config (const char *, const char *) */
80 static void logfile_print (const char *msg, int severity,
81 cdtime_t timestamp_time)
82 {
83 FILE *fh;
84 _Bool do_close = 0;
85 struct tm timestamp_tm;
86 char timestamp_str[64];
87 char level_str[16] = "";
89 if (print_severity)
90 {
91 switch (severity)
92 {
93 case LOG_ERR:
94 snprintf(level_str, sizeof (level_str), "[error] ");
95 break;
96 case LOG_WARNING:
97 snprintf(level_str, sizeof (level_str), "[warning] ");
98 break;
99 case LOG_NOTICE:
100 snprintf(level_str, sizeof (level_str), "[notice] ");
101 break;
102 case LOG_INFO:
103 snprintf(level_str, sizeof (level_str), "[info] ");
104 break;
105 case LOG_DEBUG:
106 snprintf(level_str, sizeof (level_str), "[debug] ");
107 break;
108 default:
109 break;
110 }
111 }
113 if (print_timestamp)
114 {
115 time_t tt = CDTIME_T_TO_TIME_T (timestamp_time);
116 localtime_r (&tt, ×tamp_tm);
118 strftime (timestamp_str, sizeof (timestamp_str), "%Y-%m-%d %H:%M:%S",
119 ×tamp_tm);
120 timestamp_str[sizeof (timestamp_str) - 1] = '\0';
121 }
123 pthread_mutex_lock (&file_lock);
125 if (log_file == NULL)
126 {
127 fh = fopen (DEFAULT_LOGFILE, "a");
128 do_close = 1;
129 }
130 else if (strcasecmp (log_file, "stderr") == 0)
131 fh = stderr;
132 else if (strcasecmp (log_file, "stdout") == 0)
133 fh = stdout;
134 else
135 {
136 fh = fopen (log_file, "a");
137 do_close = 1;
138 }
140 if (fh == NULL)
141 {
142 char errbuf[1024];
143 fprintf (stderr, "logfile plugin: fopen (%s) failed: %s\n",
144 (log_file == NULL) ? DEFAULT_LOGFILE : log_file,
145 sstrerror (errno, errbuf, sizeof (errbuf)));
146 }
147 else
148 {
149 if (print_timestamp)
150 fprintf (fh, "[%s] %s%s\n", timestamp_str, level_str, msg);
151 else
152 fprintf (fh, "%s%s\n", level_str, msg);
154 if (do_close) {
155 fclose (fh);
156 } else {
157 fflush(fh);
158 }
159 }
161 pthread_mutex_unlock (&file_lock);
163 return;
164 } /* void logfile_print */
166 static void logfile_log (int severity, const char *msg,
167 user_data_t __attribute__((unused)) *user_data)
168 {
169 if (severity > log_level)
170 return;
172 logfile_print (msg, severity, cdtime ());
173 } /* void logfile_log (int, const char *) */
175 static int logfile_notification (const notification_t *n,
176 user_data_t __attribute__((unused)) *user_data)
177 {
178 char buf[1024] = "";
179 char *buf_ptr = buf;
180 int buf_len = sizeof (buf);
181 int status;
183 status = ssnprintf (buf_ptr, buf_len, "Notification: severity = %s",
184 (n->severity == NOTIF_FAILURE) ? "FAILURE"
185 : ((n->severity == NOTIF_WARNING) ? "WARNING"
186 : ((n->severity == NOTIF_OKAY) ? "OKAY" : "UNKNOWN")));
187 if (status > 0)
188 {
189 buf_ptr += status;
190 buf_len -= status;
191 }
193 #define APPEND(bufptr, buflen, key, value) \
194 if ((buflen > 0) && (strlen (value) > 0)) { \
195 int status = ssnprintf (bufptr, buflen, ", %s = %s", key, value); \
196 if (status > 0) { \
197 bufptr += status; \
198 buflen -= status; \
199 } \
200 }
201 APPEND (buf_ptr, buf_len, "host", n->host);
202 APPEND (buf_ptr, buf_len, "plugin", n->plugin);
203 APPEND (buf_ptr, buf_len, "plugin_instance", n->plugin_instance);
204 APPEND (buf_ptr, buf_len, "type", n->type);
205 APPEND (buf_ptr, buf_len, "type_instance", n->type_instance);
206 APPEND (buf_ptr, buf_len, "message", n->message);
208 buf[sizeof (buf) - 1] = '\0';
210 logfile_print (buf, LOG_INFO,
211 (n->time != 0) ? n->time : cdtime ());
213 return (0);
214 } /* int logfile_notification */
216 void module_register (void)
217 {
218 plugin_register_config ("logfile", logfile_config,
219 config_keys, config_keys_num);
220 plugin_register_log ("logfile", logfile_log, /* user_data = */ NULL);
221 plugin_register_notification ("logfile", logfile_notification,
222 /* user_data = */ NULL);
223 } /* void module_register (void) */
225 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */