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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_MESSAGE
#define LOG_DATE_BUF_SIZE 16
#define LOG_DATE_LEN (LOG_DATE_BUF_SIZE - 1)
static unsigned int log_threshold = G_LOG_LEVEL_INFO;
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
mpd_log_func(G_GNUC_UNUSED const gchar *log_domain,
G_GNUC_UNUSED GLogLevelFlags log_level,
const gchar *message, G_GNUC_UNUSED gpointer user_data)
{
FILE *file = log_level <= G_LOG_LEVEL_WARNING
? stderr : stdout;
fprintf(file, "%s%s",
stdout_mode ? "" : log_date(),
message);
}
void initLog(const int verbose)
{
ConfigParam *param;
g_log_set_default_handler(mpd_log_func, NULL);
/* unbuffer stdout, stderr is unbuffered by default, leave it */
setvbuf(stdout, (char *)NULL, _IONBF, 0);
if (verbose) {
log_threshold = G_LOG_LEVEL_DEBUG;
return;
}
if (!(param = getConfigParam(CONF_LOG_LEVEL)))
return;
if (0 == strcmp(param->value, "default")) {
log_threshold = G_LOG_LEVEL_INFO;
} else if (0 == strcmp(param->value, "secure")) {
log_threshold = LOG_LEVEL_SECURE;
} else if (0 == strcmp(param->value, "verbose")) {
log_threshold = G_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) \
mpd_printf void func(const char *fmt, ...) \
{ \
if ((int)log_threshold <= level) { \
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
mpd_printf mpd_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)
{
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);
}
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