xrdp/common/log.c

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C
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/*
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., 675 Mass Ave, Cambridge, MA 02139, USA.
xrdp: A Remote Desktop Protocol server.
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Copyright (C) Jay Sorg 2005-2010
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*/
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#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <syslog.h>
#include <stdarg.h>
#include <stdio.h>
#include <time.h>
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#include "os_calls.h"
#include "log.h"
/**
*
* @brief Opens log file
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* @param fname log file name
* @return see open(2) return values
*
*/
static int DEFAULT_CC
log_file_open(const char* fname)
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{
return open(fname, O_WRONLY | O_CREAT | O_APPEND | O_SYNC, S_IRUSR |
S_IWUSR);
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}
/**
*
* @brief Converts xrdp log level to syslog logging level
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* @param xrdp logging level
* @return syslog equivalent logging level
*
*/
static int DEFAULT_CC
log_xrdp2syslog(const int lvl)
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{
switch (lvl)
{
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case LOG_LEVEL_ALWAYS:
return LOG_CRIT;
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case LOG_LEVEL_ERROR:
return LOG_ERR;
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case LOG_LEVEL_WARNING:
return LOG_WARNING;
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case LOG_LEVEL_INFO:
return LOG_INFO;
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/* case LOG_LEVEL_DEBUG: */
default:
return LOG_DEBUG;
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}
}
/**
*ring
* @brief Converts xrdp log level to syslog logging level
* @param lvl logging level
* @param str pointer to a st
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* @return syslog equivalent logging level
*
*/
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static void DEFAULT_CC
log_lvl2str(int lvl, char* str)
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{
switch (lvl)
{
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case LOG_LEVEL_ALWAYS:
snprintf(str, 9, "%s", "[CORE ] ");
break;
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case LOG_LEVEL_ERROR:
snprintf(str, 9, "%s", "[ERROR] ");
break;
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case LOG_LEVEL_WARNING:
snprintf(str, 9, "%s", "[WARN ] ");
break;
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case LOG_LEVEL_INFO:
snprintf(str, 9, "%s", "[INFO ] ");
break;
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/* case LOG_LEVEL_DEBUG: */
default:
snprintf(str, 9, "%s", "[DEBUG] ");
break;
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}
}
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/******************************************************************************/
int DEFAULT_CC
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log_message(struct log_config* l_cfg, const unsigned int lvl, const char* msg, ...)
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{
char buff[LOG_BUFFER_SIZE + 31]; /* 19 (datetime) 4 (space+cr+lf+\0) */
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va_list ap;
int len = 0;
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int rv;
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time_t now_t;
struct tm* now;
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rv = 0;
if (0 == l_cfg)
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{
return LOG_ERROR_NO_CFG;
}
if (0 > l_cfg->fd)
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{
return LOG_ERROR_FILE_NOT_OPEN;
}
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now_t = time(&now_t);
now = localtime(&now_t);
snprintf(buff, 21, "[%.4d%.2d%.2d-%.2d:%.2d:%.2d] ", (now->tm_year) + 1900,
(now->tm_mon) + 1, now->tm_mday, now->tm_hour, now->tm_min,
now->tm_sec);
log_lvl2str(lvl, buff + 20);
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va_start(ap, msg);
len = vsnprintf(buff + 28, LOG_BUFFER_SIZE, msg, ap);
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va_end(ap);
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/* checking for truncated messages */
if (len > LOG_BUFFER_SIZE)
{
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log_message(l_cfg, LOG_LEVEL_WARNING, "next message will be truncated");
}
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/* forcing the end of message string */
#ifdef _WIN32
buff[len + 28] = '\r';
buff[len + 29] = '\n';
buff[len + 30] = '\0';
#else
#ifdef _MACOS
buff[len + 28] = '\r';
buff[len + 29] = '\0';
#else
buff[len + 28] = '\n';
buff[len + 29] = '\0';
#endif
#endif
if (l_cfg->enable_syslog && (lvl <= l_cfg->log_level))
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{
/* log to syslog */
syslog(log_xrdp2syslog(lvl), buff + 20);
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}
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if (lvl <= l_cfg->log_level)
{
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/* log to console */
g_printf((char*)buff);
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/* log to application logfile */
#ifdef LOG_ENABLE_THREAD
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pthread_mutex_lock(&(l_cfg->log_lock));
#endif
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rv = g_file_write(l_cfg->fd, (char*)buff, g_strlen((char*)buff));
#ifdef LOG_ENABLE_THREAD
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pthread_mutex_unlock(&(l_cfg->log_lock));
#endif
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}
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return rv;
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}
/******************************************************************************/
int DEFAULT_CC
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log_start(struct log_config* l_cfg)
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{
if (0 == l_cfg)
{
return LOG_ERROR_MALLOC;
}
/* if logfile is NULL, we use a default logfile */
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if (0 == l_cfg->log_file)
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{
l_cfg->log_file = g_strdup("./myprogram.log");
}
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/* if progname is NULL, we use a default name */
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if (0 == l_cfg->program_name)
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{
l_cfg->program_name = g_strdup("myprogram");
}
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/* open file */
l_cfg->fd = log_file_open(l_cfg->log_file);
if (-1 == l_cfg->fd)
{
return LOG_ERROR_FILE_OPEN;
}
/* if syslog is enabled, open it */
if (l_cfg->enable_syslog)
{
openlog(l_cfg->program_name, LOG_CONS | LOG_PID, LOG_DAEMON);
}
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#ifdef LOG_ENABLE_THREAD
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pthread_mutexattr_init(&(l_cfg->log_lock_attr));
pthread_mutex_init(&(l_cfg->log_lock), &(l_cfg->log_lock_attr));
#endif
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return LOG_STARTUP_OK;
}
/******************************************************************************/
void DEFAULT_CC
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log_end(struct log_config* l_cfg)
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{
/* if log is closed, quit silently */
if (0 == l_cfg)
{
return;
}
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/* closing log file */
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log_message(l_cfg, LOG_LEVEL_ALWAYS, "shutting down log subsystem...");
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if (0 > l_cfg->fd)
{
/* if syslog is enabled, close it */
if (l_cfg->enable_syslog)
{
closelog();
}
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}
/* closing logfile... */
g_file_close(l_cfg->fd);
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/* if syslog is enabled, close it */
if (l_cfg->enable_syslog)
{
closelog();
}
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/* freeing allocated memory */
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if (0 != l_cfg->log_file)
{
g_free(l_cfg->log_file);
l_cfg->log_file = 0;
}
if (0 != l_cfg->program_name)
{
g_free(l_cfg->program_name);
l_cfg->program_name = 0;
}
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}
/******************************************************************************/
int DEFAULT_CC
log_text2level(char* buf)
{
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if (0 == g_strcasecmp(buf, "0") ||
0 == g_strcasecmp(buf, "core"))
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{
return LOG_LEVEL_ALWAYS;
}
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else if (0 == g_strcasecmp(buf, "1") ||
0 == g_strcasecmp(buf, "error"))
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{
return LOG_LEVEL_ERROR;
}
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else if (0 == g_strcasecmp(buf, "2") ||
0 == g_strcasecmp(buf, "warn") ||
0 == g_strcasecmp(buf, "warning"))
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{
return LOG_LEVEL_WARNING;
}
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else if (0 == g_strcasecmp(buf, "3") ||
0 == g_strcasecmp(buf, "info"))
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{
return LOG_LEVEL_INFO;
}
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return LOG_LEVEL_DEBUG;
}