mirror of
https://github.com/s3fs-fuse/s3fs-fuse.git
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247 lines
8.4 KiB
C++
247 lines
8.4 KiB
C++
/*
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* s3fs - FUSE-based file system backed by Amazon S3
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*
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* Copyright(C) 2007 Randy Rizun <rrizun@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <cstdlib>
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#include <string>
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#include "common.h"
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#include "s3fs_logger.h"
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//-------------------------------------------------------------------
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// S3fsLog class : variables
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//-------------------------------------------------------------------
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const int S3fsLog::NEST_MAX;
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const char* S3fsLog::nest_spaces[S3fsLog::NEST_MAX] = {"", " ", " ", " "};
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const char* S3fsLog::LOGFILEENV = "S3FS_LOGFILE";
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const char* S3fsLog::MSGTIMESTAMP = "S3FS_MSGTIMESTAMP";
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S3fsLog* S3fsLog::pSingleton = NULL;
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S3fsLog::s3fs_log_level S3fsLog::debug_level = S3fsLog::LEVEL_CRIT;
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FILE* S3fsLog::logfp = NULL;
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std::string* S3fsLog::plogfile = NULL;
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char S3fsLog::current_time[64] = "";
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bool S3fsLog::time_stamp = true;
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//-------------------------------------------------------------------
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// S3fsLog class : class methods
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//-------------------------------------------------------------------
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bool S3fsLog::IsS3fsLogLevel(s3fs_log_level level)
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{
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return (level == (S3fsLog::debug_level & level));
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}
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bool S3fsLog::SetLogfile(const char* pfile)
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{
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if(!S3fsLog::pSingleton){
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S3FS_PRN_CRIT("S3fsLog::pSingleton is NULL.");
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return false;
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}
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return S3fsLog::pSingleton->LowSetLogfile(pfile);
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}
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bool S3fsLog::ReopenLogfile()
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{
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if(!S3fsLog::pSingleton){
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S3FS_PRN_CRIT("S3fsLog::pSingleton is NULL.");
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return false;
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}
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if(!S3fsLog::logfp){
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S3FS_PRN_INFO("Currently the log file is output to stdout/stderr.");
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return true;
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}
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if(!S3fsLog::plogfile){
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S3FS_PRN_ERR("There is a problem with the path to the log file being NULL.");
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return false;
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}
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std::string tmp = *(S3fsLog::plogfile);
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return S3fsLog::pSingleton->LowSetLogfile(tmp.c_str());
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}
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S3fsLog::s3fs_log_level S3fsLog::SetLogLevel(s3fs_log_level level)
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{
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if(!S3fsLog::pSingleton){
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S3FS_PRN_CRIT("S3fsLog::pSingleton is NULL.");
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return S3fsLog::debug_level; // Although it is an error, it returns the current value.
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}
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return S3fsLog::pSingleton->LowSetLogLevel(level);
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}
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S3fsLog::s3fs_log_level S3fsLog::BumpupLogLevel()
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{
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if(!S3fsLog::pSingleton){
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S3FS_PRN_CRIT("S3fsLog::pSingleton is NULL.");
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return S3fsLog::debug_level; // Although it is an error, it returns the current value.
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}
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return S3fsLog::pSingleton->LowBumpupLogLevel();
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}
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bool S3fsLog::SetTimeStamp(bool value)
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{
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bool old = S3fsLog::time_stamp;
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S3fsLog::time_stamp = value;
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return old;
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}
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//-------------------------------------------------------------------
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// S3fsLog class : methods
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//-------------------------------------------------------------------
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S3fsLog::S3fsLog()
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{
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if(!S3fsLog::pSingleton){
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S3fsLog::pSingleton = this;
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// init syslog(default CRIT)
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openlog("s3fs", LOG_PID | LOG_ODELAY | LOG_NOWAIT, LOG_USER);
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LowLoadEnv();
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}else{
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S3FS_PRN_ERR("Already set singleton object for S3fsLog.");
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}
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}
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S3fsLog::~S3fsLog()
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{
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if(S3fsLog::pSingleton == this){
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FILE* oldfp = S3fsLog::logfp;
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S3fsLog::logfp = NULL;
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if(oldfp && 0 != fclose(oldfp)){
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S3FS_PRN_ERR("Could not close old log file(%s), but continue...", (S3fsLog::plogfile ? S3fsLog::plogfile->c_str() : "null"));
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}
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if(S3fsLog::plogfile){
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delete S3fsLog::plogfile;
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S3fsLog::plogfile = NULL;
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}
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S3fsLog::pSingleton = NULL;
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S3fsLog::debug_level = S3fsLog::LEVEL_CRIT;
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closelog();
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}else{
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S3FS_PRN_ERR("This object is not singleton S3fsLog object.");
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}
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}
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bool S3fsLog::LowLoadEnv()
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{
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if(S3fsLog::pSingleton != this){
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S3FS_PRN_ERR("This object is not as same as S3fsLog::pSingleton.");
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return false;
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}
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char* pEnvVal;
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if(NULL != (pEnvVal = getenv(S3fsLog::LOGFILEENV))){
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if(!SetLogfile(pEnvVal)){
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return false;
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}
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}
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if(NULL != (pEnvVal = getenv(S3fsLog::MSGTIMESTAMP))){
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if(0 == strcasecmp(pEnvVal, "true") || 0 == strcasecmp(pEnvVal, "yes") || 0 == strcasecmp(pEnvVal, "1")){
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S3fsLog::time_stamp = true;
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}else if(0 == strcasecmp(pEnvVal, "false") || 0 == strcasecmp(pEnvVal, "no") || 0 == strcasecmp(pEnvVal, "0")){
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S3fsLog::time_stamp = false;
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}else{
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S3FS_PRN_WARN("Unknown %s environment value(%s) is specified, skip to set time stamp mode.", S3fsLog::MSGTIMESTAMP, pEnvVal);
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}
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}
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return true;
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}
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bool S3fsLog::LowSetLogfile(const char* pfile)
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{
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if(S3fsLog::pSingleton != this){
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S3FS_PRN_ERR("This object is not as same as S3fsLog::pSingleton.");
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return false;
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}
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if(!pfile){
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// close log file if it is opened
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if(S3fsLog::logfp && 0 != fclose(S3fsLog::logfp)){
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S3FS_PRN_ERR("Could not close log file(%s).", (S3fsLog::plogfile ? S3fsLog::plogfile->c_str() : "null"));
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return false;
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}
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S3fsLog::logfp = NULL;
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if(S3fsLog::plogfile){
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delete S3fsLog::plogfile;
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S3fsLog::plogfile = NULL;
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}
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}else{
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// open new log file
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//
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// [NOTE]
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// It will reopen even if it is the same file.
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//
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FILE* newfp;
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if(NULL == (newfp = fopen(pfile, "a+"))){
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S3FS_PRN_ERR("Could not open log file(%s).", pfile);
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return false;
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}
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// switch new log file and close old log file if it is opened
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FILE* oldfp = S3fsLog::logfp;
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S3fsLog::logfp = newfp;
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if(oldfp && 0 != fclose(oldfp)){
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S3FS_PRN_ERR("Could not close old log file(%s).", (S3fsLog::plogfile ? S3fsLog::plogfile->c_str() : "null"));
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S3fsLog::logfp = oldfp;
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fclose(newfp);
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return false;
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}
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delete S3fsLog::plogfile;
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S3fsLog::plogfile = new std::string(pfile);
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}
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return true;
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}
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S3fsLog::s3fs_log_level S3fsLog::LowSetLogLevel(s3fs_log_level level)
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{
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if(S3fsLog::pSingleton != this){
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S3FS_PRN_ERR("This object is not as same as S3fsLog::pSingleton.");
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return S3fsLog::debug_level; // Although it is an error, it returns the current value.
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}
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if(level == S3fsLog::debug_level){
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return S3fsLog::debug_level;
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}
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s3fs_log_level old = S3fsLog::debug_level;
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S3fsLog::debug_level = level;
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setlogmask(LOG_UPTO(GetSyslogLevel(S3fsLog::debug_level)));
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S3FS_PRN_CRIT("change debug level from %sto %s", GetLevelString(old), GetLevelString(S3fsLog::debug_level));
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return old;
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}
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S3fsLog::s3fs_log_level S3fsLog::LowBumpupLogLevel()
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{
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if(S3fsLog::pSingleton != this){
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S3FS_PRN_ERR("This object is not as same as S3fsLog::pSingleton.");
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return S3fsLog::debug_level; // Although it is an error, it returns the current value.
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}
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s3fs_log_level old = S3fsLog::debug_level;
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S3fsLog::debug_level = ( LEVEL_CRIT == S3fsLog::debug_level ? LEVEL_ERR :
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LEVEL_ERR == S3fsLog::debug_level ? LEVEL_WARN :
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LEVEL_WARN == S3fsLog::debug_level ? LEVEL_INFO :
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LEVEL_INFO == S3fsLog::debug_level ? LEVEL_DBG : LEVEL_CRIT );
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setlogmask(LOG_UPTO(GetSyslogLevel(S3fsLog::debug_level)));
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S3FS_PRN_CRIT("change debug level from %sto %s", GetLevelString(old), GetLevelString(S3fsLog::debug_level));
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return old;
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: expandtab sw=4 ts=4 fdm=marker
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* vim<600: expandtab sw=4 ts=4
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*/
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