1 /**
2 * collectd - src/logfile.c
3 * Copyright (C) 2007 Sebastian Harl
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; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Sebastian Harl <sh at tokkee.org>
20 * Florian Forster <octo at verplant.org>
21 **/
23 #include "collectd.h"
24 #include "common.h"
25 #include "plugin.h"
27 #include <pthread.h>
29 #define DEFAULT_LOGFILE LOCALSTATEDIR"/log/collectd.log"
31 #if COLLECT_DEBUG
32 static int log_level = LOG_DEBUG;
33 #else
34 static int log_level = LOG_INFO;
35 #endif /* COLLECT_DEBUG */
37 static pthread_mutex_t file_lock = PTHREAD_MUTEX_INITIALIZER;
39 static char *log_file = NULL;
40 static int print_timestamp = 1;
42 static const char *config_keys[] =
43 {
44 "LogLevel",
45 "File",
46 "Timestamp"
47 };
48 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
50 static int logfile_config (const char *key, const char *value)
51 {
52 if (0 == strcasecmp (key, "LogLevel")) {
53 if ((0 == strcasecmp (value, "emerg"))
54 || (0 == strcasecmp (value, "alert"))
55 || (0 == strcasecmp (value, "crit"))
56 || (0 == strcasecmp (value, "err")))
57 log_level = LOG_ERR;
58 else if (0 == strcasecmp (value, "warning"))
59 log_level = LOG_WARNING;
60 else if (0 == strcasecmp (value, "notice"))
61 log_level = LOG_NOTICE;
62 else if (0 == strcasecmp (value, "info"))
63 log_level = LOG_INFO;
64 #if COLLECT_DEBUG
65 else if (0 == strcasecmp (value, "debug"))
66 log_level = LOG_DEBUG;
67 #endif /* COLLECT_DEBUG */
68 else
69 return 1;
70 }
71 else if (0 == strcasecmp (key, "File")) {
72 sfree (log_file);
73 log_file = strdup (value);
74 }
75 else if (0 == strcasecmp (key, "File")) {
76 if ((strcasecmp (value, "false") == 0)
77 || (strcasecmp (value, "no") == 0)
78 || (strcasecmp (value, "off") == 0))
79 print_timestamp = 0;
80 else
81 print_timestamp = 1;
82 }
83 else {
84 return -1;
85 }
86 return 0;
87 } /* int logfile_config (const char *, const char *) */
89 static void logfile_log (int severity, const char *msg)
90 {
91 FILE *fh;
92 int do_close = 0;
93 time_t timestamp_time;
94 struct tm timestamp_tm;
95 char timestamp_str[64];
97 if (severity > log_level)
98 return;
100 if (print_timestamp)
101 {
102 timestamp_time = time (NULL);
103 localtime_r (×tamp_time, ×tamp_tm);
105 strftime (timestamp_str, sizeof (timestamp_str), "%Y-%m-%d %H:%M:%S",
106 ×tamp_tm);
107 timestamp_str[sizeof (timestamp_str) - 1] = '\0';
108 }
110 pthread_mutex_lock (&file_lock);
112 if (log_file == NULL)
113 {
114 fh = fopen (DEFAULT_LOGFILE, "a");
115 do_close = 1;
116 }
117 else if (strcasecmp (log_file, "stderr") == 0)
118 fh = stderr;
119 else if (strcasecmp (log_file, "stdout") == 0)
120 fh = stdout;
121 else
122 {
123 fh = fopen (log_file, "a");
124 do_close = 1;
125 }
127 if (fh == NULL)
128 {
129 char errbuf[1024];
130 fprintf (stderr, "logfile plugin: fopen (%s) failed: %s\n",
131 (log_file == NULL) ? DEFAULT_LOGFILE : log_file,
132 sstrerror (errno, errbuf, sizeof (errbuf)));
133 }
134 else
135 {
136 if (print_timestamp)
137 fprintf (fh, "[%s] %s\n", timestamp_str, msg);
138 else
139 fprintf (fh, "%s\n", msg);
141 if (do_close != 0)
142 fclose (fh);
143 }
145 pthread_mutex_unlock (&file_lock);
147 return;
148 } /* void logfile_log (int, const char *) */
150 void module_register (void)
151 {
152 plugin_register_config ("logfile", logfile_config,
153 config_keys, config_keys_num);
154 plugin_register_log ("logfile", logfile_log);
155 } /* void module_register (void) */
157 /* vim: set sw=4 ts=4 tw=78 noexpandtab : */