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/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "LogBackend.hxx"
#include "Log.hxx"
#include "util/Domain.hxx"
#include "util/CharUtil.hxx"
#ifdef HAVE_GLIB
#include <glib.h>
#endif
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#ifdef HAVE_SYSLOG
#include <syslog.h>
#endif
static LogLevel log_threshold = LogLevel::INFO;
#ifdef HAVE_GLIB
static const char *log_charset;
#endif
static bool enable_timestamp;
#ifdef HAVE_SYSLOG
static bool enable_syslog;
#endif
void
SetLogThreshold(LogLevel _threshold)
{
log_threshold = _threshold;
}
#ifdef HAVE_GLIB
void
SetLogCharset(const char *_charset)
{
log_charset = _charset;
}
#endif
void
EnableLogTimestamp()
{
#ifdef HAVE_SYSLOG
assert(!enable_syslog);
#endif
assert(!enable_timestamp);
enable_timestamp = true;
}
static const char *log_date(void)
{
static constexpr size_t LOG_DATE_BUF_SIZE = 16;
static char buf[LOG_DATE_BUF_SIZE];
time_t t = time(nullptr);
strftime(buf, LOG_DATE_BUF_SIZE, "%b %d %H:%M : ", localtime(&t));
return buf;
}
/**
* Determines the length of the string excluding trailing whitespace
* characters.
*/
static int
chomp_length(const char *p)
{
size_t length = strlen(p);
while (length > 0 && IsWhitespaceOrNull(p[length - 1]))
--length;
return (int)length;
}
#ifdef HAVE_SYSLOG
static int
ToSysLogLevel(LogLevel log_level)
{
switch (log_level) {
case LogLevel::DEBUG:
return LOG_DEBUG;
case LogLevel::INFO:
return LOG_INFO;
case LogLevel::DEFAULT:
return LOG_NOTICE;
case LogLevel::WARNING:
return LOG_WARNING;
case LogLevel::ERROR:
return LOG_ERR;
}
assert(false);
gcc_unreachable();
}
static void
SysLog(const Domain &domain, LogLevel log_level, const char *message)
{
syslog(ToSysLogLevel(log_level), "%s: %.*s",
domain.GetName(),
chomp_length(message), message);
}
void
LogInitSysLog()
{
openlog(PACKAGE, 0, LOG_DAEMON);
enable_syslog = true;
}
void
LogFinishSysLog()
{
if (enable_syslog)
closelog();
}
#endif
static void
FileLog(const Domain &domain, const char *message)
{
#ifdef HAVE_GLIB
char *converted;
if (log_charset != nullptr) {
converted = g_convert_with_fallback(message, -1,
log_charset, "utf-8",
nullptr, nullptr,
nullptr, nullptr);
if (converted != nullptr)
message = converted;
} else
converted = nullptr;
#endif
fprintf(stderr, "%s%s: %.*s\n",
enable_timestamp ? log_date() : "",
domain.GetName(),
chomp_length(message), message);
#ifdef HAVE_GLIB
g_free(converted);
#endif
}
void
Log(const Domain &domain, LogLevel level, const char *msg)
{
if (level < log_threshold)
return;
#ifdef HAVE_SYSLOG
if (enable_syslog) {
SysLog(domain, level, msg);
return;
}
#endif
FileLog(domain, msg);
}
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