1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "log.h"
#include "conf.h"
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <stdarg.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>
#include <glib.h>
#define LOG_DATE_BUF_SIZE 16
#define LOG_DATE_LEN (LOG_DATE_BUF_SIZE - 1)
static unsigned int log_threshold = LOG_LEVEL_LOW;
static int stdout_mode = 1;
static int out_fd = -1;
static int err_fd = -1;
static const char *out_filename;
static const char *err_filename;
static void redirect_logs(void)
{
assert(out_fd >= 0);
assert(err_fd >= 0);
if (dup2(out_fd, STDOUT_FILENO) < 0)
FATAL("problems dup2 stdout : %s\n", strerror(errno));
if (dup2(err_fd, STDERR_FILENO) < 0)
FATAL("problems dup2 stderr : %s\n", strerror(errno));
}
static const char *log_date(void)
{
static char buf[LOG_DATE_BUF_SIZE];
time_t t = time(NULL);
strftime(buf, LOG_DATE_BUF_SIZE, "%b %d %H:%M : ", localtime(&t));
return buf;
}
static void do_log(FILE *fp, const char *fmt, va_list args)
{
if (!stdout_mode)
fwrite(log_date(), LOG_DATE_LEN, 1, fp);
vfprintf(fp, fmt, args);
}
void initLog(const int verbose)
{
ConfigParam *param;
/* unbuffer stdout, stderr is unbuffered by default, leave it */
setvbuf(stdout, (char *)NULL, _IONBF, 0);
if (verbose) {
log_threshold = LOG_LEVEL_DEBUG;
return;
}
if (!(param = getConfigParam(CONF_LOG_LEVEL)))
return;
if (0 == strcmp(param->value, "default")) {
log_threshold = LOG_LEVEL_LOW;
} else if (0 == strcmp(param->value, "secure")) {
log_threshold = LOG_LEVEL_SECURE;
} else if (0 == strcmp(param->value, "verbose")) {
log_threshold = LOG_LEVEL_DEBUG;
} else {
FATAL("unknown log level \"%s\" at line %i\n",
param->value, param->line);
}
}
void open_log_files(const int use_stdout)
{
mode_t prev;
ConfigParam *param;
if (use_stdout)
return;
prev = umask(0066);
param = parseConfigFilePath(CONF_LOG_FILE, 1);
out_filename = param->value;
out_fd = open(out_filename, O_CREAT | O_WRONLY | O_APPEND, 0666);
if (out_fd < 0)
FATAL("problem opening log file \"%s\" (config line %i) for "
"writing\n", param->value, param->line);
param = parseConfigFilePath(CONF_ERROR_FILE, 1);
err_filename = param->value;
err_fd = open(err_filename, O_CREAT | O_WRONLY | O_APPEND, 0666);
if (err_fd < 0)
FATAL("problem opening error file \"%s\" (config line %i) for "
"writing\n", param->value, param->line);
umask(prev);
}
void setup_log_output(const int use_stdout)
{
fflush(NULL);
if (!use_stdout) {
redirect_logs();
stdout_mode = 0;
}
}
#define log_func(func,level,fp) \
mpd_printf void func(const char *fmt, ...) \
{ \
if ((int)log_threshold >= level) { \
va_list args; \
va_start(args, fmt); \
do_log(fp, fmt, args); \
va_end(args); \
} \
}
log_func(ERROR, 0, stderr)
log_func(WARNING, 0, stderr)
log_func(LOG, 0, stdout)
log_func(SECURE, LOG_LEVEL_SECURE, stdout)
log_func(DEBUG, LOG_LEVEL_DEBUG, stdout)
#undef log_func
mpd_printf mpd_noreturn void FATAL(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
do_log(stderr, fmt, args);
va_end(args);
exit(EXIT_FAILURE);
}
int cycle_log_files(void)
{
mode_t prev;
if (stdout_mode)
return 0;
assert(out_filename);
assert(err_filename);
DEBUG("Cycling log files...\n");
close_log_files();
prev = umask(0066);
out_fd = open(out_filename, O_CREAT | O_WRONLY | O_APPEND, 0666);
if (out_fd < 0) {
ERROR("error re-opening log file: %s\n", out_filename);
return -1;
}
err_fd = open(err_filename, O_CREAT | O_WRONLY | O_APPEND, 0666);
if (err_fd < 0) {
ERROR("error re-opening error file: %s\n", err_filename);
return -1;
}
umask(prev);
redirect_logs();
DEBUG("Done cycling log files\n");
return 0;
}
void close_log_files(void)
{
if (stdout_mode)
return;
assert(out_fd >= 0);
assert(err_fd >= 0);
close(out_fd);
close(err_fd);
}
|
