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/* 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_LEVEL_SECURE G_LOG_LEVEL_INFO
#define LOG_DATE_BUF_SIZE 16
#define LOG_DATE_LEN (LOG_DATE_BUF_SIZE - 1)
static GLogLevelFlags log_threshold = G_LOG_LEVEL_MESSAGE;
static const char *log_charset;
static bool stdout_mode = true;
static int out_fd = -1;
static const char *out_filename;
static void redirect_logs(void)
{
assert(out_fd >= 0);
if (dup2(out_fd, STDOUT_FILENO) < 0)
FATAL("problems dup2 stdout : %s\n", strerror(errno));
if (dup2(out_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
mpd_log_func(const gchar *log_domain,
G_GNUC_UNUSED GLogLevelFlags log_level,
const gchar *message, G_GNUC_UNUSED gpointer user_data)
{
char *converted;
if (log_level > log_threshold)
return;
if (log_charset != NULL) {
converted = g_convert_with_fallback(message, -1,
log_charset, "utf-8",
NULL, NULL, NULL, NULL);
if (converted != NULL)
message = converted;
} else
converted = NULL;
if (log_domain == NULL)
log_domain = "";
fprintf(stderr, "%s%s%s%s",
stdout_mode ? "" : log_date(),
log_domain, *log_domain == 0 ? "" : ": ",
message);
g_free(converted);
}
static int
open_log_file(void)
{
assert(out_filename != NULL);
return open(out_filename, O_CREAT | O_WRONLY | O_APPEND, 0666);
}
static inline GLogLevelFlags
parse_log_level(const char *value, unsigned line)
{
if (0 == strcmp(value, "default"))
return G_LOG_LEVEL_MESSAGE;
if (0 == strcmp(value, "secure"))
return LOG_LEVEL_SECURE;
else if (0 == strcmp(value, "verbose"))
return G_LOG_LEVEL_DEBUG;
else
FATAL("unknown log level \"%s\" at line %u\n",
value, line);
}
void log_init(bool verbose, bool use_stdout)
{
ConfigParam *param;
g_get_charset(&log_charset);
g_log_set_default_handler(mpd_log_func, NULL);
if (verbose)
log_threshold = G_LOG_LEVEL_DEBUG;
else if ((param = getConfigParam(CONF_LOG_LEVEL)) != NULL)
log_threshold = parse_log_level(param->value, param->line);
if (use_stdout)
return;
param = parseConfigFilePath(CONF_LOG_FILE, 1);
out_filename = param->value;
out_fd = open_log_file();
if (out_fd < 0)
FATAL("problem opening log file \"%s\" (config line %i) for "
"writing\n", param->value, param->line);
}
void setup_log_output(bool use_stdout)
{
fflush(NULL);
if (!use_stdout) {
redirect_logs();
stdout_mode = false;
log_charset = NULL;
}
}
#define log_func(func,level) \
G_GNUC_PRINTF(1, 2) void func(const char *fmt, ...) \
{ \
if (level <= log_threshold) { \
va_list args; \
va_start(args, fmt); \
g_logv(NULL, level, fmt, args); \
va_end(args); \
} \
}
log_func(ERROR, G_LOG_LEVEL_WARNING)
log_func(WARNING, G_LOG_LEVEL_WARNING)
log_func(LOG, G_LOG_LEVEL_MESSAGE)
log_func(SECURE, LOG_LEVEL_SECURE)
log_func(DEBUG, G_LOG_LEVEL_DEBUG)
#undef log_func
G_GNUC_PRINTF(1, 2) G_GNUC_NORETURN void FATAL(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
g_logv(NULL, G_LOG_LEVEL_ERROR, fmt, args);
va_end(args);
exit(EXIT_FAILURE);
}
int cycle_log_files(void)
{
if (stdout_mode)
return 0;
assert(out_filename);
DEBUG("Cycling log files...\n");
close_log_files();
out_fd = open_log_file();
if (out_fd < 0) {
ERROR("error re-opening log file: %s\n", out_filename);
return -1;
}
redirect_logs();
DEBUG("Done cycling log files\n");
return 0;
}
void close_log_files(void)
{
if (stdout_mode)
return;
assert(out_fd >= 0);
close(out_fd);
}
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